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-rw-r--r--ChangeLog8
-rw-r--r--generic/tkImgPhInstance.c1962
-rw-r--r--generic/tkImgPhoto.c2234
-rw-r--r--generic/tkImgPhoto.h262
-rw-r--r--unix/Makefile.in13
-rw-r--r--win/Makefile.in3
-rw-r--r--win/makefile.bc3
-rw-r--r--win/makefile.vc3
8 files changed, 2311 insertions, 2177 deletions
diff --git a/ChangeLog b/ChangeLog
index a59c2fc..490b0b1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2008-08-25 Donal K. Fellows <dkf@users.sf.net>
+
+ * generic/tkImgPhoto.c: Split the implementation of the core of
+ * generic/tkImgPhoto.h: photo images into two pieces, the photo
+ * generic/tkImgPhInstance.c: master (which manages the data model and
+ the interaction with the script level) and the photo instances (which
+ handle display).
+
2008-08-22 Don Porter <dgp@users.sourceforge.net>
*** 8.6a2 TAGGED FOR RELEASE ***
diff --git a/generic/tkImgPhInstance.c b/generic/tkImgPhInstance.c
new file mode 100644
index 0000000..1b0395e
--- /dev/null
+++ b/generic/tkImgPhInstance.c
@@ -0,0 +1,1962 @@
+/*
+ * tkImgPhInstance.c --
+ *
+ * Implements the rendering of images of type "photo" for Tk. Photo
+ * images are stored in full color (32 bits per pixel including alpha
+ * channel) and displayed using dithering if necessary.
+ *
+ * Copyright (c) 1994 The Australian National University.
+ * Copyright (c) 1994-1997 Sun Microsystems, Inc.
+ * Copyright (c) 2002-2008 Donal K. Fellows
+ * Copyright (c) 2003 ActiveState Corporation.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * Author: Paul Mackerras (paulus@cs.anu.edu.au),
+ * Department of Computer Science,
+ * Australian National University.
+ *
+ * RCS: @(#) $Id: tkImgPhInstance.c,v 1.1 2008/08/25 11:44:04 dkf Exp $
+ */
+
+#include "tkImgPhoto.h"
+
+/*
+ * Declaration for internal Xlib function used here:
+ */
+
+extern int _XInitImageFuncPtrs(XImage *image);
+
+/*
+ * Forward declarations
+ */
+
+static void BlendComplexAlpha(XImage *bgImg, PhotoInstance *iPtr,
+ int xOffset, int yOffset, int width, int height);
+static int IsValidPalette(PhotoInstance *instancePtr,
+ const char *palette);
+static int CountBits(pixel mask);
+static void GetColorTable(PhotoInstance *instancePtr);
+static void FreeColorTable(ColorTable *colorPtr, int force);
+static void AllocateColors(ColorTable *colorPtr);
+static void DisposeColorTable(ClientData clientData);
+static int ReclaimColors(ColorTableId *id, int numColors);
+
+/*
+ * Hash table used to hash from (display, colormap, palette, gamma) to
+ * ColorTable address.
+ */
+
+static Tcl_HashTable imgPhotoColorHash;
+static int imgPhotoColorHashInitialized;
+#define N_COLOR_HASH (sizeof(ColorTableId) / sizeof(int))
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkImgPhotoConfigureInstance --
+ *
+ * This function is called to create displaying information for a photo
+ * image instance based on the configuration information in the master.
+ * It is invoked both when new instances are created and when the master
+ * is reconfigured.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Generates errors via Tcl_BackgroundError if there are problems in
+ * setting up the instance.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkImgPhotoConfigureInstance(
+ PhotoInstance *instancePtr) /* Instance to reconfigure. */
+{
+ PhotoMaster *masterPtr = instancePtr->masterPtr;
+ XImage *imagePtr;
+ int bitsPerPixel;
+ ColorTable *colorTablePtr;
+ XRectangle validBox;
+
+ /*
+ * If the -palette configuration option has been set for the master, use
+ * the value specified for our palette, but only if it is a valid palette
+ * for our windows. Use the gamma value specified the master.
+ */
+
+ if ((masterPtr->palette && masterPtr->palette[0])
+ && IsValidPalette(instancePtr, masterPtr->palette)) {
+ instancePtr->palette = masterPtr->palette;
+ } else {
+ instancePtr->palette = instancePtr->defaultPalette;
+ }
+ instancePtr->gamma = masterPtr->gamma;
+
+ /*
+ * If we don't currently have a color table, or if the one we have no
+ * longer applies (e.g. because our palette or gamma has changed), get a
+ * new one.
+ */
+
+ colorTablePtr = instancePtr->colorTablePtr;
+ if ((colorTablePtr == NULL)
+ || (instancePtr->colormap != colorTablePtr->id.colormap)
+ || (instancePtr->palette != colorTablePtr->id.palette)
+ || (instancePtr->gamma != colorTablePtr->id.gamma)) {
+ /*
+ * Free up our old color table, and get a new one.
+ */
+
+ if (colorTablePtr != NULL) {
+ colorTablePtr->liveRefCount -= 1;
+ FreeColorTable(colorTablePtr, 0);
+ }
+ GetColorTable(instancePtr);
+
+ /*
+ * Create a new XImage structure for sending data to the X server, if
+ * necessary.
+ */
+
+ if (instancePtr->colorTablePtr->flags & BLACK_AND_WHITE) {
+ bitsPerPixel = 1;
+ } else {
+ bitsPerPixel = instancePtr->visualInfo.depth;
+ }
+
+ if ((instancePtr->imagePtr == NULL)
+ || (instancePtr->imagePtr->bits_per_pixel != bitsPerPixel)) {
+ if (instancePtr->imagePtr != NULL) {
+ XDestroyImage(instancePtr->imagePtr);
+ }
+ imagePtr = XCreateImage(instancePtr->display,
+ instancePtr->visualInfo.visual, (unsigned) bitsPerPixel,
+ (bitsPerPixel > 1? ZPixmap: XYBitmap), 0, NULL,
+ 1, 1, 32, 0);
+ instancePtr->imagePtr = imagePtr;
+
+ /*
+ * We create images using the local host's endianness, rather than
+ * the endianness of the server; otherwise we would have to
+ * byte-swap any 16 or 32 bit values that we store in the image
+ * if the server's endianness is different from ours.
+ */
+
+ if (imagePtr != NULL) {
+#ifdef WORDS_BIGENDIAN
+ imagePtr->byte_order = MSBFirst;
+#else
+ imagePtr->byte_order = LSBFirst;
+#endif
+ _XInitImageFuncPtrs(imagePtr);
+ }
+ }
+ }
+
+ /*
+ * If the user has specified a width and/or height for the master which is
+ * different from our current width/height, set the size to the values
+ * specified by the user. If we have no pixmap, we do this also, since it
+ * has the side effect of allocating a pixmap for us.
+ */
+
+ if ((instancePtr->pixels == None) || (instancePtr->error == NULL)
+ || (instancePtr->width != masterPtr->width)
+ || (instancePtr->height != masterPtr->height)) {
+ TkImgPhotoInstanceSetSize(instancePtr);
+ }
+
+ /*
+ * Redither this instance if necessary.
+ */
+
+ if ((masterPtr->flags & IMAGE_CHANGED)
+ || (instancePtr->colorTablePtr != colorTablePtr)) {
+ TkClipBox(masterPtr->validRegion, &validBox);
+ if ((validBox.width > 0) && (validBox.height > 0)) {
+ TkImgDitherInstance(instancePtr, validBox.x, validBox.y,
+ validBox.width, validBox.height);
+ }
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkImgPhotoGet --
+ *
+ * This function is called for each use of a photo image in a widget.
+ *
+ * Results:
+ * The return value is a token for the instance, which is passed back to
+ * us in calls to TkImgPhotoDisplay and ImgPhotoFree.
+ *
+ * Side effects:
+ * A data structure is set up for the instance (or, an existing instance
+ * is re-used for the new one).
+ *
+ *----------------------------------------------------------------------
+ */
+
+ClientData
+TkImgPhotoGet(
+ Tk_Window tkwin, /* Window in which the instance will be
+ * used. */
+ ClientData masterData) /* Pointer to our master structure for the
+ * image. */
+{
+ PhotoMaster *masterPtr = masterData;
+ PhotoInstance *instancePtr;
+ Colormap colormap;
+ int mono, nRed, nGreen, nBlue, numVisuals;
+ XVisualInfo visualInfo, *visInfoPtr;
+ char buf[TCL_INTEGER_SPACE * 3];
+ XColor *white, *black;
+ XGCValues gcValues;
+
+ /*
+ * Table of "best" choices for palette for PseudoColor displays with
+ * between 3 and 15 bits/pixel.
+ */
+
+ static const int paletteChoice[13][3] = {
+ /* #red, #green, #blue */
+ {2, 2, 2, /* 3 bits, 8 colors */},
+ {2, 3, 2, /* 4 bits, 12 colors */},
+ {3, 4, 2, /* 5 bits, 24 colors */},
+ {4, 5, 3, /* 6 bits, 60 colors */},
+ {5, 6, 4, /* 7 bits, 120 colors */},
+ {7, 7, 4, /* 8 bits, 198 colors */},
+ {8, 10, 6, /* 9 bits, 480 colors */},
+ {10, 12, 8, /* 10 bits, 960 colors */},
+ {14, 15, 9, /* 11 bits, 1890 colors */},
+ {16, 20, 12, /* 12 bits, 3840 colors */},
+ {20, 24, 16, /* 13 bits, 7680 colors */},
+ {26, 30, 20, /* 14 bits, 15600 colors */},
+ {32, 32, 30, /* 15 bits, 30720 colors */}
+ };
+
+ /*
+ * See if there is already an instance for windows using the same
+ * colormap. If so then just re-use it.
+ */
+
+ colormap = Tk_Colormap(tkwin);
+ for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
+ instancePtr = instancePtr->nextPtr) {
+ if ((colormap == instancePtr->colormap)
+ && (Tk_Display(tkwin) == instancePtr->display)) {
+ /*
+ * Re-use this instance.
+ */
+
+ if (instancePtr->refCount == 0) {
+ /*
+ * We are resurrecting this instance.
+ */
+
+ Tcl_CancelIdleCall(TkImgDisposeInstance, instancePtr);
+ if (instancePtr->colorTablePtr != NULL) {
+ FreeColorTable(instancePtr->colorTablePtr, 0);
+ }
+ GetColorTable(instancePtr);
+ }
+ instancePtr->refCount++;
+ return instancePtr;
+ }
+ }
+
+ /*
+ * The image isn't already in use in a window with the same colormap. Make
+ * a new instance of the image.
+ */
+
+ instancePtr = (PhotoInstance *) ckalloc(sizeof(PhotoInstance));
+ instancePtr->masterPtr = masterPtr;
+ instancePtr->display = Tk_Display(tkwin);
+ instancePtr->colormap = Tk_Colormap(tkwin);
+ Tk_PreserveColormap(instancePtr->display, instancePtr->colormap);
+ instancePtr->refCount = 1;
+ instancePtr->colorTablePtr = NULL;
+ instancePtr->pixels = None;
+ instancePtr->error = NULL;
+ instancePtr->width = 0;
+ instancePtr->height = 0;
+ instancePtr->imagePtr = 0;
+ instancePtr->nextPtr = masterPtr->instancePtr;
+ masterPtr->instancePtr = instancePtr;
+
+ /*
+ * Obtain information about the visual and decide on the default palette.
+ */
+
+ visualInfo.screen = Tk_ScreenNumber(tkwin);
+ visualInfo.visualid = XVisualIDFromVisual(Tk_Visual(tkwin));
+ visInfoPtr = XGetVisualInfo(Tk_Display(tkwin),
+ VisualScreenMask | VisualIDMask, &visualInfo, &numVisuals);
+ if (visInfoPtr == NULL) {
+ Tcl_Panic("TkImgPhotoGet couldn't find visual for window");
+ }
+
+ nRed = 2;
+ nGreen = nBlue = 0;
+ mono = 1;
+ instancePtr->visualInfo = *visInfoPtr;
+ switch (visInfoPtr->class) {
+ case DirectColor:
+ case TrueColor:
+ nRed = 1 << CountBits(visInfoPtr->red_mask);
+ nGreen = 1 << CountBits(visInfoPtr->green_mask);
+ nBlue = 1 << CountBits(visInfoPtr->blue_mask);
+ mono = 0;
+ break;
+ case PseudoColor:
+ case StaticColor:
+ if (visInfoPtr->depth > 15) {
+ nRed = 32;
+ nGreen = 32;
+ nBlue = 32;
+ mono = 0;
+ } else if (visInfoPtr->depth >= 3) {
+ const int *ip = paletteChoice[visInfoPtr->depth - 3];
+
+ nRed = ip[0];
+ nGreen = ip[1];
+ nBlue = ip[2];
+ mono = 0;
+ }
+ break;
+ case GrayScale:
+ case StaticGray:
+ nRed = 1 << visInfoPtr->depth;
+ break;
+ }
+ XFree((char *) visInfoPtr);
+
+ sprintf(buf, ((mono) ? "%d": "%d/%d/%d"), nRed, nGreen, nBlue);
+ instancePtr->defaultPalette = Tk_GetUid(buf);
+
+ /*
+ * Make a GC with background = black and foreground = white.
+ */
+
+ white = Tk_GetColor(masterPtr->interp, tkwin, "white");
+ black = Tk_GetColor(masterPtr->interp, tkwin, "black");
+ gcValues.foreground = (white != NULL)? white->pixel:
+ WhitePixelOfScreen(Tk_Screen(tkwin));
+ gcValues.background = (black != NULL)? black->pixel:
+ BlackPixelOfScreen(Tk_Screen(tkwin));
+ gcValues.graphics_exposures = False;
+ instancePtr->gc = Tk_GetGC(tkwin,
+ GCForeground|GCBackground|GCGraphicsExposures, &gcValues);
+
+ /*
+ * Set configuration options and finish the initialization of the
+ * instance. This will also dither the image if necessary.
+ */
+
+ TkImgPhotoConfigureInstance(instancePtr);
+
+ /*
+ * If this is the first instance, must set the size of the image.
+ */
+
+ if (instancePtr->nextPtr == NULL) {
+ Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0,
+ masterPtr->width, masterPtr->height);
+ }
+
+ return instancePtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * BlendComplexAlpha --
+ *
+ * This function is called when an image with partially transparent
+ * pixels must be drawn over another image. It blends the photo data onto
+ * a local copy of the surface that we are drawing on, *including* the
+ * pixels drawn by everything that should be drawn underneath the image.
+ *
+ * Much of this code has hard-coded values in for speed because this
+ * routine is performance critical for complex image drawing.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Background image passed in gets drawn over with image data.
+ *
+ * Notes:
+ * This should work on all platforms that set mask and shift data
+ * properly from the visualInfo. RGB is really only a 24+ bpp version
+ * whereas RGB15 is the correct version and works for 15bpp+, but it
+ * slower, so it's only used for 15bpp+.
+ *
+ * Note that Win32 pre-defines those operations that we really need.
+ *
+ *----------------------------------------------------------------------
+ */
+
+#ifndef __WIN32__
+#define GetRValue(rgb) (UCHAR(((rgb) & red_mask) >> red_shift))
+#define GetGValue(rgb) (UCHAR(((rgb) & green_mask) >> green_shift))
+#define GetBValue(rgb) (UCHAR(((rgb) & blue_mask) >> blue_shift))
+#define RGB(r, g, b) ((unsigned)( \
+ (UCHAR(r) << red_shift) | \
+ (UCHAR(g) << green_shift) | \
+ (UCHAR(b) << blue_shift) ))
+#define RGB15(r, g, b) ((unsigned)( \
+ (((r) * red_mask / 255) & red_mask) | \
+ (((g) * green_mask / 255) & green_mask) | \
+ (((b) * blue_mask / 255) & blue_mask) ))
+#endif /* !__WIN32__ */
+
+static void
+BlendComplexAlpha(
+ XImage *bgImg, /* Background image to draw on. */
+ PhotoInstance *iPtr, /* Image instance to draw. */
+ int xOffset, int yOffset, /* X & Y offset into image instance to
+ * draw. */
+ int width, int height) /* Width & height of image to draw. */
+{
+ int x, y, line;
+ unsigned long pixel;
+ unsigned char r, g, b, alpha, unalpha, *masterPtr;
+ unsigned char *alphaAr = iPtr->masterPtr->pix32;
+
+ /*
+ * This blending is an integer version of the Source-Over compositing rule
+ * (see Porter&Duff, "Compositing Digital Images", proceedings of SIGGRAPH
+ * 1984) that has been hard-coded (for speed) to work with targetting a
+ * solid surface.
+ *
+ * The 'unalpha' field must be 255-alpha; it is separated out to encourage
+ * more efficient compilation.
+ */
+
+#define ALPHA_BLEND(bgPix, imgPix, alpha, unalpha) \
+ ((bgPix * unalpha + imgPix * alpha) / 255)
+
+ /*
+ * We have to get the mask and shift info from the visual on non-Win32 so
+ * that the macros Get*Value(), RGB() and RGB15() work correctly. This
+ * might be cached for better performance.
+ */
+
+#ifndef __WIN32__
+ unsigned long red_mask, green_mask, blue_mask;
+ unsigned long red_shift, green_shift, blue_shift;
+ Visual *visual = iPtr->visualInfo.visual;
+
+ red_mask = visual->red_mask;
+ green_mask = visual->green_mask;
+ blue_mask = visual->blue_mask;
+ red_shift = 0;
+ green_shift = 0;
+ blue_shift = 0;
+ while ((0x0001 & (red_mask >> red_shift)) == 0) {
+ red_shift++;
+ }
+ while ((0x0001 & (green_mask >> green_shift)) == 0) {
+ green_shift++;
+ }
+ while ((0x0001 & (blue_mask >> blue_shift)) == 0) {
+ blue_shift++;
+ }
+#endif /* !__WIN32__ */
+
+ /*
+ * Only UNIX requires the special case for <24bpp. It varies with 3 extra
+ * shifts and uses RGB15. The 24+bpp version could also then be further
+ * optimized.
+ */
+
+#if !(defined(__WIN32__) || defined(MAC_OSX_TK))
+ if (bgImg->depth < 24) {
+ unsigned char red_mlen, green_mlen, blue_mlen;
+
+ red_mlen = 8 - CountBits(red_mask >> red_shift);
+ green_mlen = 8 - CountBits(green_mask >> green_shift);
+ blue_mlen = 8 - CountBits(blue_mask >> blue_shift);
+ for (y = 0; y < height; y++) {
+ line = (y + yOffset) * iPtr->masterPtr->width;
+ for (x = 0; x < width; x++) {
+ masterPtr = alphaAr + ((line + x + xOffset) * 4);
+ alpha = masterPtr[3];
+
+ /*
+ * Ignore pixels that are fully transparent
+ */
+
+ if (alpha) {
+ /*
+ * We could perhaps be more efficient than XGetPixel for
+ * 24 and 32 bit displays, but this seems "fast enough".
+ */
+
+ r = masterPtr[0];
+ g = masterPtr[1];
+ b = masterPtr[2];
+ if (alpha != 255) {
+ /*
+ * Only blend pixels that have some transparency
+ */
+
+ unsigned char ra, ga, ba;
+
+ pixel = XGetPixel(bgImg, x, y);
+ ra = GetRValue(pixel) << red_mlen;
+ ga = GetGValue(pixel) << green_mlen;
+ ba = GetBValue(pixel) << blue_mlen;
+ unalpha = 255 - alpha; /* Calculate once. */
+ r = ALPHA_BLEND(ra, r, alpha, unalpha);
+ g = ALPHA_BLEND(ga, g, alpha, unalpha);
+ b = ALPHA_BLEND(ba, b, alpha, unalpha);
+ }
+ XPutPixel(bgImg, x, y, RGB15(r, g, b));
+ }
+ }
+ }
+ return;
+ }
+#endif /* !__WIN32__ && !MAC_OSX_TK */
+
+ for (y = 0; y < height; y++) {
+ line = (y + yOffset) * iPtr->masterPtr->width;
+ for (x = 0; x < width; x++) {
+ masterPtr = alphaAr + ((line + x + xOffset) * 4);
+ alpha = masterPtr[3];
+
+ /*
+ * Ignore pixels that are fully transparent
+ */
+
+ if (alpha) {
+ /*
+ * We could perhaps be more efficient than XGetPixel for 24
+ * and 32 bit displays, but this seems "fast enough".
+ */
+
+ r = masterPtr[0];
+ g = masterPtr[1];
+ b = masterPtr[2];
+ if (alpha != 255) {
+ /*
+ * Only blend pixels that have some transparency
+ */
+
+ unsigned char ra, ga, ba;
+
+ pixel = XGetPixel(bgImg, x, y);
+ ra = GetRValue(pixel);
+ ga = GetGValue(pixel);
+ ba = GetBValue(pixel);
+ unalpha = 255 - alpha; /* Calculate once. */
+ r = ALPHA_BLEND(ra, r, alpha, unalpha);
+ g = ALPHA_BLEND(ga, g, alpha, unalpha);
+ b = ALPHA_BLEND(ba, b, alpha, unalpha);
+ }
+ XPutPixel(bgImg, x, y, RGB(r, g, b));
+ }
+ }
+ }
+#undef ALPHA_BLEND
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkImgPhotoDisplay --
+ *
+ * This function is invoked to draw a photo image.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * A portion of the image gets rendered in a pixmap or window.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkImgPhotoDisplay(
+ ClientData clientData, /* Pointer to PhotoInstance structure for
+ * instance to be displayed. */
+ Display *display, /* Display on which to draw image. */
+ Drawable drawable, /* Pixmap or window in which to draw image. */
+ int imageX, int imageY, /* Upper-left corner of region within image to
+ * draw. */
+ int width, int height, /* Dimensions of region within image to
+ * draw. */
+ int drawableX,int drawableY)/* Coordinates within drawable that correspond
+ * to imageX and imageY. */
+{
+ PhotoInstance *instancePtr = clientData;
+ XVisualInfo visInfo = instancePtr->visualInfo;
+
+ /*
+ * If there's no pixmap, it means that an error occurred while creating
+ * the image instance so it can't be displayed.
+ */
+
+ if (instancePtr->pixels == None) {
+ return;
+ }
+
+ if ((instancePtr->masterPtr->flags & COMPLEX_ALPHA)
+ && visInfo.depth >= 15
+ && (visInfo.class == DirectColor || visInfo.class == TrueColor)) {
+ Tk_ErrorHandler handler;
+ XImage *bgImg = NULL;
+
+ /*
+ * Create an error handler to suppress the case where the input was
+ * not properly constrained, which can cause an X error. [Bug 979239]
+ */
+
+ handler = Tk_CreateErrorHandler(display, -1, -1, -1, NULL, NULL);
+
+ /*
+ * Pull the current background from the display to blend with
+ */
+
+ bgImg = XGetImage(display, drawable, drawableX, drawableY,
+ (unsigned int)width, (unsigned int)height, AllPlanes, ZPixmap);
+ if (bgImg == NULL) {
+ Tk_DeleteErrorHandler(handler);
+ return;
+ }
+
+ BlendComplexAlpha(bgImg, instancePtr, imageX, imageY, width, height);
+
+ /*
+ * Color info is unimportant as we only do this operation for depth >=
+ * 15.
+ */
+
+ TkPutImage(NULL, 0, display, drawable, instancePtr->gc,
+ bgImg, 0, 0, drawableX, drawableY,
+ (unsigned int) width, (unsigned int) height);
+ XDestroyImage(bgImg);
+ Tk_DeleteErrorHandler(handler);
+ } else {
+ /*
+ * masterPtr->region describes which parts of the image contain valid
+ * data. We set this region as the clip mask for the gc, setting its
+ * origin appropriately, and use it when drawing the image.
+ */
+
+ TkSetRegion(display, instancePtr->gc,
+ instancePtr->masterPtr->validRegion);
+ XSetClipOrigin(display, instancePtr->gc, drawableX - imageX,
+ drawableY - imageY);
+ XCopyArea(display, instancePtr->pixels, drawable, instancePtr->gc,
+ imageX, imageY, (unsigned) width, (unsigned) height,
+ drawableX, drawableY);
+ XSetClipMask(display, instancePtr->gc, None);
+ XSetClipOrigin(display, instancePtr->gc, 0, 0);
+ }
+ XFlush(display);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkImgPhotoFree --
+ *
+ * This function is called when a widget ceases to use a particular
+ * instance of an image. We don't actually get rid of the instance until
+ * later because we may be about to get this instance again.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Internal data structures get cleaned up, later.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkImgPhotoFree(
+ ClientData clientData, /* Pointer to PhotoInstance structure for
+ * instance to be displayed. */
+ Display *display) /* Display containing window that used
+ * image. */
+{
+ PhotoInstance *instancePtr = clientData;
+ ColorTable *colorPtr;
+
+ instancePtr->refCount -= 1;
+ if (instancePtr->refCount > 0) {
+ return;
+ }
+
+ /*
+ * There are no more uses of the image within this widget. Decrement the
+ * count of live uses of its color table, so that its colors can be
+ * reclaimed if necessary, and set up an idle call to free the instance
+ * structure.
+ */
+
+ colorPtr = instancePtr->colorTablePtr;
+ if (colorPtr != NULL) {
+ colorPtr->liveRefCount -= 1;
+ }
+
+ Tcl_DoWhenIdle(TkImgDisposeInstance, instancePtr);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkImgPhotoInstanceSetSize --
+ *
+ * This function reallocates the instance pixmap and dithering error
+ * array for a photo instance, as necessary, to change the image's size
+ * to `width' x `height' pixels.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Storage gets reallocated, here and in the X server.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkImgPhotoInstanceSetSize(
+ PhotoInstance *instancePtr) /* Instance whose size is to be changed. */
+{
+ PhotoMaster *masterPtr;
+ schar *newError, *errSrcPtr, *errDestPtr;
+ int h, offset;
+ XRectangle validBox;
+ Pixmap newPixmap;
+
+ masterPtr = instancePtr->masterPtr;
+ TkClipBox(masterPtr->validRegion, &validBox);
+
+ if ((instancePtr->width != masterPtr->width)
+ || (instancePtr->height != masterPtr->height)
+ || (instancePtr->pixels == None)) {
+ newPixmap = Tk_GetPixmap(instancePtr->display,
+ RootWindow(instancePtr->display,
+ instancePtr->visualInfo.screen),
+ (masterPtr->width > 0) ? masterPtr->width: 1,
+ (masterPtr->height > 0) ? masterPtr->height: 1,
+ instancePtr->visualInfo.depth);
+ if (!newPixmap) {
+ Tcl_Panic("Fail to create pixmap with Tk_GetPixmap in TkImgPhotoInstanceSetSize.\n");
+ }
+
+ /*
+ * The following is a gross hack needed to properly support colormaps
+ * under Windows. Before the pixels can be copied to the pixmap, the
+ * relevent colormap must be associated with the drawable. Normally we
+ * can infer this association from the window that was used to create
+ * the pixmap. However, in this case we're using the root window, so
+ * we have to be more explicit.
+ */
+
+ TkSetPixmapColormap(newPixmap, instancePtr->colormap);
+
+ if (instancePtr->pixels != None) {
+ /*
+ * Copy any common pixels from the old pixmap and free it.
+ */
+
+ XCopyArea(instancePtr->display, instancePtr->pixels, newPixmap,
+ instancePtr->gc, validBox.x, validBox.y,
+ validBox.width, validBox.height, validBox.x, validBox.y);
+ Tk_FreePixmap(instancePtr->display, instancePtr->pixels);
+ }
+ instancePtr->pixels = newPixmap;
+ }
+
+ if ((instancePtr->width != masterPtr->width)
+ || (instancePtr->height != masterPtr->height)
+ || (instancePtr->error == NULL)) {
+ if (masterPtr->height > 0 && masterPtr->width > 0) {
+ /*
+ * TODO: use attemptckalloc() here once there is a strategy that
+ * will allow us to recover from failure. Right now, there's no
+ * such possibility.
+ */
+
+ newError = (schar *) ckalloc((unsigned)
+ masterPtr->height * masterPtr->width * 3 * sizeof(schar));
+
+ /*
+ * Zero the new array so that we don't get bogus error values
+ * propagating into areas we dither later.
+ */
+
+ if ((instancePtr->error != NULL)
+ && ((instancePtr->width == masterPtr->width)
+ || (validBox.width == masterPtr->width))) {
+ if (validBox.y > 0) {
+ memset(newError, 0, (size_t)
+ validBox.y * masterPtr->width * 3 * sizeof(schar));
+ }
+ h = validBox.y + validBox.height;
+ if (h < masterPtr->height) {
+ memset(newError + h*masterPtr->width*3, 0,
+ (size_t) (masterPtr->height - h)
+ * masterPtr->width * 3 * sizeof(schar));
+ }
+ } else {
+ memset(newError, 0, (size_t)
+ masterPtr->height * masterPtr->width *3*sizeof(schar));
+ }
+ } else {
+ newError = NULL;
+ }
+
+ if (instancePtr->error != NULL) {
+ /*
+ * Copy the common area over to the new array and free the old
+ * array.
+ */
+
+ if (masterPtr->width == instancePtr->width) {
+ offset = validBox.y * masterPtr->width * 3;
+ memcpy(newError + offset, instancePtr->error + offset,
+ (size_t) (validBox.height
+ * masterPtr->width * 3 * sizeof(schar)));
+
+ } else if (validBox.width > 0 && validBox.height > 0) {
+ errDestPtr = newError +
+ (validBox.y * masterPtr->width + validBox.x) * 3;
+ errSrcPtr = instancePtr->error +
+ (validBox.y * instancePtr->width + validBox.x) * 3;
+
+ for (h = validBox.height; h > 0; --h) {
+ memcpy(errDestPtr, errSrcPtr,
+ validBox.width * 3 * sizeof(schar));
+ errDestPtr += masterPtr->width * 3;
+ errSrcPtr += instancePtr->width * 3;
+ }
+ }
+ ckfree((char *) instancePtr->error);
+ }
+
+ instancePtr->error = newError;
+ }
+
+ instancePtr->width = masterPtr->width;
+ instancePtr->height = masterPtr->height;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * IsValidPalette --
+ *
+ * This function is called to check whether a value given for the
+ * -palette option is valid for a particular instance of a photo image.
+ *
+ * Results:
+ * A boolean value: 1 if the palette is acceptable, 0 otherwise.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+IsValidPalette(
+ PhotoInstance *instancePtr, /* Instance to which the palette specification
+ * is to be applied. */
+ const char *palette) /* Palette specification string. */
+{
+ int nRed, nGreen, nBlue, mono, numColors;
+ char *endp;
+
+ /*
+ * First parse the specification: it must be of the form %d or %d/%d/%d.
+ */
+
+ nRed = strtol(palette, &endp, 10);
+ if ((endp == palette) || ((*endp != 0) && (*endp != '/'))
+ || (nRed < 2) || (nRed > 256)) {
+ return 0;
+ }
+
+ if (*endp == 0) {
+ mono = 1;
+ nGreen = nBlue = nRed;
+ } else {
+ palette = endp + 1;
+ nGreen = strtol(palette, &endp, 10);
+ if ((endp == palette) || (*endp != '/') || (nGreen < 2)
+ || (nGreen > 256)) {
+ return 0;
+ }
+ palette = endp + 1;
+ nBlue = strtol(palette, &endp, 10);
+ if ((endp == palette) || (*endp != 0) || (nBlue < 2)
+ || (nBlue > 256)) {
+ return 0;
+ }
+ mono = 0;
+ }
+
+ switch (instancePtr->visualInfo.class) {
+ case DirectColor:
+ case TrueColor:
+ if ((nRed > (1 << CountBits(instancePtr->visualInfo.red_mask)))
+ || (nGreen>(1<<CountBits(instancePtr->visualInfo.green_mask)))
+ || (nBlue>(1<<CountBits(instancePtr->visualInfo.blue_mask)))) {
+ return 0;
+ }
+ break;
+ case PseudoColor:
+ case StaticColor:
+ numColors = nRed;
+ if (!mono) {
+ numColors *= nGreen * nBlue;
+ }
+ if (numColors > (1 << instancePtr->visualInfo.depth)) {
+ return 0;
+ }
+ break;
+ case GrayScale:
+ case StaticGray:
+ if (!mono || (nRed > (1 << instancePtr->visualInfo.depth))) {
+ return 0;
+ }
+ break;
+ }
+
+ return 1;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * CountBits --
+ *
+ * This function counts how many bits are set to 1 in `mask'.
+ *
+ * Results:
+ * The integer number of bits.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+CountBits(
+ pixel mask) /* Value to count the 1 bits in. */
+{
+ int n;
+
+ for (n=0 ; mask!=0 ; mask&=mask-1) {
+ n++;
+ }
+ return n;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * GetColorTable --
+ *
+ * This function is called to allocate a table of colormap information
+ * for an instance of a photo image. Only one such table is allocated for
+ * all photo instances using the same display, colormap, palette and
+ * gamma values, so that the application need only request a set of
+ * colors from the X server once for all such photo widgets. This
+ * function maintains a hash table to find previously-allocated
+ * ColorTables.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * A new ColorTable may be allocated and placed in the hash table, and
+ * have colors allocated for it.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+GetColorTable(
+ PhotoInstance *instancePtr) /* Instance needing a color table. */
+{
+ ColorTable *colorPtr;
+ Tcl_HashEntry *entry;
+ ColorTableId id;
+ int isNew;
+
+ /*
+ * Look for an existing ColorTable in the hash table.
+ */
+
+ memset(&id, 0, sizeof(id));
+ id.display = instancePtr->display;
+ id.colormap = instancePtr->colormap;
+ id.palette = instancePtr->palette;
+ id.gamma = instancePtr->gamma;
+ if (!imgPhotoColorHashInitialized) {
+ Tcl_InitHashTable(&imgPhotoColorHash, N_COLOR_HASH);
+ imgPhotoColorHashInitialized = 1;
+ }
+ entry = Tcl_CreateHashEntry(&imgPhotoColorHash, (char *) &id, &isNew);
+
+ if (!isNew) {
+ /*
+ * Re-use the existing entry.
+ */
+
+ colorPtr = Tcl_GetHashValue(entry);
+ } else {
+ /*
+ * No color table currently available; need to make one.
+ */
+
+ colorPtr = (ColorTable *) ckalloc(sizeof(ColorTable));
+
+ /*
+ * The following line of code should not normally be needed due to the
+ * assignment in the following line. However, it compensates for bugs
+ * in some compilers (HP, for example) where sizeof(ColorTable) is 24
+ * but the assignment only copies 20 bytes, leaving 4 bytes
+ * uninitialized; these cause problems when using the id for lookups
+ * in imgPhotoColorHash, and can result in core dumps.
+ */
+
+ memset(&colorPtr->id, 0, sizeof(ColorTableId));
+ colorPtr->id = id;
+ Tk_PreserveColormap(colorPtr->id.display, colorPtr->id.colormap);
+ colorPtr->flags = 0;
+ colorPtr->refCount = 0;
+ colorPtr->liveRefCount = 0;
+ colorPtr->numColors = 0;
+ colorPtr->visualInfo = instancePtr->visualInfo;
+ colorPtr->pixelMap = NULL;
+ Tcl_SetHashValue(entry, colorPtr);
+ }
+
+ colorPtr->refCount++;
+ colorPtr->liveRefCount++;
+ instancePtr->colorTablePtr = colorPtr;
+ if (colorPtr->flags & DISPOSE_PENDING) {
+ Tcl_CancelIdleCall(DisposeColorTable, colorPtr);
+ colorPtr->flags &= ~DISPOSE_PENDING;
+ }
+
+ /*
+ * Allocate colors for this color table if necessary.
+ */
+
+ if ((colorPtr->numColors == 0)
+ && ((colorPtr->flags & BLACK_AND_WHITE) == 0)) {
+ AllocateColors(colorPtr);
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * FreeColorTable --
+ *
+ * This function is called when an instance ceases using a color table.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * If no other instances are using this color table, a when-idle handler
+ * is registered to free up the color table and the colors allocated for
+ * it.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+FreeColorTable(
+ ColorTable *colorPtr, /* Pointer to the color table which is no
+ * longer required by an instance. */
+ int force) /* Force free to happen immediately. */
+{
+ colorPtr->refCount--;
+ if (colorPtr->refCount > 0) {
+ return;
+ }
+
+ if (force) {
+ if ((colorPtr->flags & DISPOSE_PENDING) != 0) {
+ Tcl_CancelIdleCall(DisposeColorTable, colorPtr);
+ colorPtr->flags &= ~DISPOSE_PENDING;
+ }
+ DisposeColorTable(colorPtr);
+ } else if ((colorPtr->flags & DISPOSE_PENDING) == 0) {
+ Tcl_DoWhenIdle(DisposeColorTable, colorPtr);
+ colorPtr->flags |= DISPOSE_PENDING;
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * AllocateColors --
+ *
+ * This function allocates the colors required by a color table, and sets
+ * up the fields in the color table data structure which are used in
+ * dithering.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Colors are allocated from the X server. Fields in the color table data
+ * structure are updated.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+AllocateColors(
+ ColorTable *colorPtr) /* Pointer to the color table requiring colors
+ * to be allocated. */
+{
+ int i, r, g, b, rMult, mono;
+ int numColors, nRed, nGreen, nBlue;
+ double fr, fg, fb, igam;
+ XColor *colors;
+ unsigned long *pixels;
+
+ /*
+ * 16-bit intensity value for i/n of full intensity.
+ */
+#define CFRAC(i, n) ((i) * 65535 / (n))
+
+ /* As for CFRAC, but apply exponent of g. */
+#define CGFRAC(i, n, g) ((int)(65535 * pow((double)(i) / (n), (g))))
+
+ /*
+ * First parse the palette specification to get the required number of
+ * shades of each primary.
+ */
+
+ mono = sscanf(colorPtr->id.palette, "%d/%d/%d", &nRed, &nGreen, &nBlue)
+ <= 1;
+ igam = 1.0 / colorPtr->id.gamma;
+
+ /*
+ * Each time around this loop, we reduce the number of colors we're trying
+ * to allocate until we succeed in allocating all of the colors we need.
+ */
+
+ for (;;) {
+ /*
+ * If we are using 1 bit/pixel, we don't need to allocate any colors
+ * (we just use the foreground and background colors in the GC).
+ */
+
+ if (mono && (nRed <= 2)) {
+ colorPtr->flags |= BLACK_AND_WHITE;
+ return;
+ }
+
+ /*
+ * Calculate the RGB coordinates of the colors we want to allocate and
+ * store them in *colors.
+ */
+
+ if ((colorPtr->visualInfo.class == DirectColor)
+ || (colorPtr->visualInfo.class == TrueColor)) {
+
+ /*
+ * Direct/True Color: allocate shades of red, green, blue
+ * independently.
+ */
+
+ if (mono) {
+ numColors = nGreen = nBlue = nRed;
+ } else {
+ numColors = MAX(MAX(nRed, nGreen), nBlue);
+ }
+ colors = (XColor *) ckalloc(numColors * sizeof(XColor));
+
+ for (i = 0; i < numColors; ++i) {
+ if (igam == 1.0) {
+ colors[i].red = CFRAC(i, nRed - 1);
+ colors[i].green = CFRAC(i, nGreen - 1);
+ colors[i].blue = CFRAC(i, nBlue - 1);
+ } else {
+ colors[i].red = CGFRAC(i, nRed - 1, igam);
+ colors[i].green = CGFRAC(i, nGreen - 1, igam);
+ colors[i].blue = CGFRAC(i, nBlue - 1, igam);
+ }
+ }
+ } else {
+ /*
+ * PseudoColor, StaticColor, GrayScale or StaticGray visual: we
+ * have to allocate each color in the color cube separately.
+ */
+
+ numColors = (mono) ? nRed: (nRed * nGreen * nBlue);
+ colors = (XColor *) ckalloc(numColors * sizeof(XColor));
+
+ if (!mono) {
+ /*
+ * Color display using a PseudoColor or StaticColor visual.
+ */
+
+ i = 0;
+ for (r = 0; r < nRed; ++r) {
+ for (g = 0; g < nGreen; ++g) {
+ for (b = 0; b < nBlue; ++b) {
+ if (igam == 1.0) {
+ colors[i].red = CFRAC(r, nRed - 1);
+ colors[i].green = CFRAC(g, nGreen - 1);
+ colors[i].blue = CFRAC(b, nBlue - 1);
+ } else {
+ colors[i].red = CGFRAC(r, nRed - 1, igam);
+ colors[i].green = CGFRAC(g, nGreen - 1, igam);
+ colors[i].blue = CGFRAC(b, nBlue - 1, igam);
+ }
+ i++;
+ }
+ }
+ }
+ } else {
+ /*
+ * Monochrome display - allocate the shades of grey we want.
+ */
+
+ for (i = 0; i < numColors; ++i) {
+ if (igam == 1.0) {
+ r = CFRAC(i, numColors - 1);
+ } else {
+ r = CGFRAC(i, numColors - 1, igam);
+ }
+ colors[i].red = colors[i].green = colors[i].blue = r;
+ }
+ }
+ }
+
+ /*
+ * Now try to allocate the colors we've calculated.
+ */
+
+ pixels = (unsigned long *) ckalloc(numColors * sizeof(unsigned long));
+ for (i = 0; i < numColors; ++i) {
+ if (!XAllocColor(colorPtr->id.display, colorPtr->id.colormap,
+ &colors[i])) {
+ /*
+ * Can't get all the colors we want in the default colormap;
+ * first try freeing colors from other unused color tables.
+ */
+
+ if (!ReclaimColors(&colorPtr->id, numColors - i)
+ || !XAllocColor(colorPtr->id.display,
+ colorPtr->id.colormap, &colors[i])) {
+ /*
+ * Still can't allocate the color.
+ */
+
+ break;
+ }
+ }
+ pixels[i] = colors[i].pixel;
+ }
+
+ /*
+ * If we didn't get all of the colors, reduce the resolution of the
+ * color cube, free the ones we got, and try again.
+ */
+
+ if (i >= numColors) {
+ break;
+ }
+ XFreeColors(colorPtr->id.display, colorPtr->id.colormap, pixels, i, 0);
+ ckfree((char *) colors);
+ ckfree((char *) pixels);
+
+ if (!mono) {
+ if ((nRed == 2) && (nGreen == 2) && (nBlue == 2)) {
+ /*
+ * Fall back to 1-bit monochrome display.
+ */
+
+ mono = 1;
+ } else {
+ /*
+ * Reduce the number of shades of each primary to about 3/4 of
+ * the previous value. This should reduce the total number of
+ * colors required to about half the previous value for
+ * PseudoColor displays.
+ */
+
+ nRed = (nRed * 3 + 2) / 4;
+ nGreen = (nGreen * 3 + 2) / 4;
+ nBlue = (nBlue * 3 + 2) / 4;
+ }
+ } else {
+ /*
+ * Reduce the number of shades of gray to about 1/2.
+ */
+
+ nRed = nRed / 2;
+ }
+ }
+
+ /*
+ * We have allocated all of the necessary colors: fill in various fields
+ * of the ColorTable record.
+ */
+
+ if (!mono) {
+ colorPtr->flags |= COLOR_WINDOW;
+
+ /*
+ * The following is a hairy hack. We only want to index into the
+ * pixelMap on colormap displays. However, if the display is on
+ * Windows, then we actually want to store the index not the value
+ * since we will be passing the color table into the TkPutImage call.
+ */
+
+#ifndef __WIN32__
+ if ((colorPtr->visualInfo.class != DirectColor)
+ && (colorPtr->visualInfo.class != TrueColor)) {
+ colorPtr->flags |= MAP_COLORS;
+ }
+#endif /* __WIN32__ */
+ }
+
+ colorPtr->numColors = numColors;
+ colorPtr->pixelMap = pixels;
+
+ /*
+ * Set up quantization tables for dithering.
+ */
+
+ rMult = nGreen * nBlue;
+ for (i = 0; i < 256; ++i) {
+ r = (i * (nRed - 1) + 127) / 255;
+ if (mono) {
+ fr = (double) colors[r].red / 65535.0;
+ if (colorPtr->id.gamma != 1.0 ) {
+ fr = pow(fr, colorPtr->id.gamma);
+ }
+ colorPtr->colorQuant[0][i] = (int)(fr * 255.99);
+ colorPtr->redValues[i] = colors[r].pixel;
+ } else {
+ g = (i * (nGreen - 1) + 127) / 255;
+ b = (i * (nBlue - 1) + 127) / 255;
+ if ((colorPtr->visualInfo.class == DirectColor)
+ || (colorPtr->visualInfo.class == TrueColor)) {
+ colorPtr->redValues[i] =
+ colors[r].pixel & colorPtr->visualInfo.red_mask;
+ colorPtr->greenValues[i] =
+ colors[g].pixel & colorPtr->visualInfo.green_mask;
+ colorPtr->blueValues[i] =
+ colors[b].pixel & colorPtr->visualInfo.blue_mask;
+ } else {
+ r *= rMult;
+ g *= nBlue;
+ colorPtr->redValues[i] = r;
+ colorPtr->greenValues[i] = g;
+ colorPtr->blueValues[i] = b;
+ }
+ fr = (double) colors[r].red / 65535.0;
+ fg = (double) colors[g].green / 65535.0;
+ fb = (double) colors[b].blue / 65535.0;
+ if (colorPtr->id.gamma != 1.0) {
+ fr = pow(fr, colorPtr->id.gamma);
+ fg = pow(fg, colorPtr->id.gamma);
+ fb = pow(fb, colorPtr->id.gamma);
+ }
+ colorPtr->colorQuant[0][i] = (int)(fr * 255.99);
+ colorPtr->colorQuant[1][i] = (int)(fg * 255.99);
+ colorPtr->colorQuant[2][i] = (int)(fb * 255.99);
+ }
+ }
+
+ ckfree((char *) colors);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * DisposeColorTable --
+ *
+ * Release a color table and its associated resources.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The colors in the argument color table are freed, as is the color
+ * table structure itself. The color table is removed from the hash table
+ * which is used to locate color tables.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+DisposeColorTable(
+ ClientData clientData) /* Pointer to the ColorTable whose
+ * colors are to be released. */
+{
+ ColorTable *colorPtr = clientData;
+ Tcl_HashEntry *entry;
+
+ if (colorPtr->pixelMap != NULL) {
+ if (colorPtr->numColors > 0) {
+ XFreeColors(colorPtr->id.display, colorPtr->id.colormap,
+ colorPtr->pixelMap, colorPtr->numColors, 0);
+ Tk_FreeColormap(colorPtr->id.display, colorPtr->id.colormap);
+ }
+ ckfree((char *) colorPtr->pixelMap);
+ }
+
+ entry = Tcl_FindHashEntry(&imgPhotoColorHash, (char *) &colorPtr->id);
+ if (entry == NULL) {
+ Tcl_Panic("DisposeColorTable couldn't find hash entry");
+ }
+ Tcl_DeleteHashEntry(entry);
+
+ ckfree((char *) colorPtr);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ReclaimColors --
+ *
+ * This function is called to try to free up colors in the colormap used
+ * by a color table. It looks for other color tables with the same
+ * colormap and with a zero live reference count, and frees their colors.
+ * It only does so if there is the possibility of freeing up at least
+ * `numColors' colors.
+ *
+ * Results:
+ * The return value is TRUE if any colors were freed, FALSE otherwise.
+ *
+ * Side effects:
+ * ColorTables which are not currently in use may lose their color
+ * allocations.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+ReclaimColors(
+ ColorTableId *id, /* Pointer to information identifying
+ * the color table which needs more colors. */
+ int numColors) /* Number of colors required. */
+{
+ Tcl_HashSearch srch;
+ Tcl_HashEntry *entry;
+ ColorTable *colorPtr;
+ int nAvail = 0;
+
+ /*
+ * First scan through the color hash table to get an upper bound on how
+ * many colors we might be able to free.
+ */
+
+ entry = Tcl_FirstHashEntry(&imgPhotoColorHash, &srch);
+ while (entry != NULL) {
+ colorPtr = Tcl_GetHashValue(entry);
+ if ((colorPtr->id.display == id->display)
+ && (colorPtr->id.colormap == id->colormap)
+ && (colorPtr->liveRefCount == 0 )&& (colorPtr->numColors != 0)
+ && ((colorPtr->id.palette != id->palette)
+ || (colorPtr->id.gamma != id->gamma))) {
+ /*
+ * We could take this guy's colors off him.
+ */
+
+ nAvail += colorPtr->numColors;
+ }
+ entry = Tcl_NextHashEntry(&srch);
+ }
+
+ /*
+ * nAvail is an (over)estimate of the number of colors we could free.
+ */
+
+ if (nAvail < numColors) {
+ return 0;
+ }
+
+ /*
+ * Scan through a second time freeing colors.
+ */
+
+ entry = Tcl_FirstHashEntry(&imgPhotoColorHash, &srch);
+ while ((entry != NULL) && (numColors > 0)) {
+ colorPtr = Tcl_GetHashValue(entry);
+ if ((colorPtr->id.display == id->display)
+ && (colorPtr->id.colormap == id->colormap)
+ && (colorPtr->liveRefCount == 0) && (colorPtr->numColors != 0)
+ && ((colorPtr->id.palette != id->palette)
+ || (colorPtr->id.gamma != id->gamma))) {
+ /*
+ * Free the colors that this ColorTable has.
+ */
+
+ XFreeColors(colorPtr->id.display, colorPtr->id.colormap,
+ colorPtr->pixelMap, colorPtr->numColors, 0);
+ numColors -= colorPtr->numColors;
+ colorPtr->numColors = 0;
+ ckfree((char *) colorPtr->pixelMap);
+ colorPtr->pixelMap = NULL;
+ }
+
+ entry = Tcl_NextHashEntry(&srch);
+ }
+ return 1; /* We freed some colors. */
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkImgDisposeInstance --
+ *
+ * This function is called to finally free up an instance of a photo
+ * image which is no longer required.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The instance data structure and the resources it references are freed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkImgDisposeInstance(
+ ClientData clientData) /* Pointer to the instance whose resources are
+ * to be released. */
+{
+ PhotoInstance *instancePtr = clientData;
+ PhotoInstance *prevPtr;
+
+ if (instancePtr->pixels != None) {
+ Tk_FreePixmap(instancePtr->display, instancePtr->pixels);
+ }
+ if (instancePtr->gc != None) {
+ Tk_FreeGC(instancePtr->display, instancePtr->gc);
+ }
+ if (instancePtr->imagePtr != NULL) {
+ XDestroyImage(instancePtr->imagePtr);
+ }
+ if (instancePtr->error != NULL) {
+ ckfree((char *) instancePtr->error);
+ }
+ if (instancePtr->colorTablePtr != NULL) {
+ FreeColorTable(instancePtr->colorTablePtr, 1);
+ }
+
+ if (instancePtr->masterPtr->instancePtr == instancePtr) {
+ instancePtr->masterPtr->instancePtr = instancePtr->nextPtr;
+ } else {
+ for (prevPtr = instancePtr->masterPtr->instancePtr;
+ prevPtr->nextPtr != instancePtr; prevPtr = prevPtr->nextPtr) {
+ /* Empty loop body. */
+ }
+ prevPtr->nextPtr = instancePtr->nextPtr;
+ }
+ Tk_FreeColormap(instancePtr->display, instancePtr->colormap);
+ ckfree((char *) instancePtr);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkImgDitherInstance --
+ *
+ * This function is called to update an area of an instance's pixmap by
+ * dithering the corresponding area of the master.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The instance's pixmap gets updated.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkImgDitherInstance(
+ PhotoInstance *instancePtr, /* The instance to be updated. */
+ int xStart, int yStart, /* Coordinates of the top-left pixel in the
+ * block to be dithered. */
+ int width, int height) /* Dimensions of the block to be dithered. */
+{
+ PhotoMaster *masterPtr = instancePtr->masterPtr;
+ ColorTable *colorPtr = instancePtr->colorTablePtr;
+ XImage *imagePtr;
+ int nLines, bigEndian, i, c, x, y, xEnd, doDithering = 1;
+ int bitsPerPixel, bytesPerLine, lineLength;
+ unsigned char *srcLinePtr;
+ schar *errLinePtr;
+ pixel firstBit, word, mask;
+
+ /*
+ * Turn dithering off in certain cases where it is not needed (TrueColor,
+ * DirectColor with many colors).
+ */
+
+ if ((colorPtr->visualInfo.class == DirectColor)
+ || (colorPtr->visualInfo.class == TrueColor)) {
+ int nRed, nGreen, nBlue, result;
+
+ result = sscanf(colorPtr->id.palette, "%d/%d/%d", &nRed,
+ &nGreen, &nBlue);
+ if ((nRed >= 256)
+ && ((result == 1) || ((nGreen >= 256) && (nBlue >= 256)))) {
+ doDithering = 0;
+ }
+ }
+
+ /*
+ * First work out how many lines to do at a time, then how many bytes
+ * we'll need for pixel storage, and allocate it.
+ */
+
+ nLines = (MAX_PIXELS + width - 1) / width;
+ if (nLines < 1) {
+ nLines = 1;
+ }
+ if (nLines > height ) {
+ nLines = height;
+ }
+
+ imagePtr = instancePtr->imagePtr;
+ if (imagePtr == NULL) {
+ return; /* We must be really tight on memory. */
+ }
+ bitsPerPixel = imagePtr->bits_per_pixel;
+ bytesPerLine = ((bitsPerPixel * width + 31) >> 3) & ~3;
+ imagePtr->width = width;
+ imagePtr->height = nLines;
+ imagePtr->bytes_per_line = bytesPerLine;
+
+ /*
+ * TODO: use attemptckalloc() here once we have some strategy for
+ * recovering from the failure.
+ */
+
+ imagePtr->data =
+ ckalloc((unsigned) (imagePtr->bytes_per_line * nLines));
+ bigEndian = imagePtr->bitmap_bit_order == MSBFirst;
+ firstBit = bigEndian? (1 << (imagePtr->bitmap_unit - 1)): 1;
+
+ lineLength = masterPtr->width * 3;
+ srcLinePtr = masterPtr->pix32 + (yStart * masterPtr->width + xStart) * 4;
+ errLinePtr = instancePtr->error + yStart * lineLength + xStart * 3;
+ xEnd = xStart + width;
+
+ /*
+ * Loop over the image, doing at most nLines lines before updating the
+ * screen image.
+ */
+
+ for (; height > 0; height -= nLines) {
+ unsigned char *dstLinePtr = (unsigned char *) imagePtr->data;
+ int yEnd;
+
+ if (nLines > height) {
+ nLines = height;
+ }
+ yEnd = yStart + nLines;
+ for (y = yStart; y < yEnd; ++y) {
+ unsigned char *srcPtr = srcLinePtr;
+ schar *errPtr = errLinePtr;
+ unsigned char *destBytePtr = dstLinePtr;
+ pixel *destLongPtr = (pixel *) dstLinePtr;
+
+ if (colorPtr->flags & COLOR_WINDOW) {
+ /*
+ * Color window. We dither the three components independently,
+ * using Floyd-Steinberg dithering, which propagates errors
+ * from the quantization of pixels to the pixels below and to
+ * the right.
+ */
+
+ for (x = xStart; x < xEnd; ++x) {
+ int col[3];
+
+ if (doDithering) {
+ for (i = 0; i < 3; ++i) {
+ /*
+ * Compute the error propagated into this pixel
+ * for this component. If e[x,y] is the array of
+ * quantization error values, we compute
+ * 7/16 * e[x-1,y] + 1/16 * e[x-1,y-1]
+ * + 5/16 * e[x,y-1] + 3/16 * e[x+1,y-1]
+ * and round it to an integer.
+ *
+ * The expression ((c + 2056) >> 4) - 128 computes
+ * round(c / 16), and works correctly on machines
+ * without a sign-extending right shift.
+ */
+
+ c = (x > 0) ? errPtr[-3] * 7: 0;
+ if (y > 0) {
+ if (x > 0) {
+ c += errPtr[-lineLength-3];
+ }
+ c += errPtr[-lineLength] * 5;
+ if ((x + 1) < masterPtr->width) {
+ c += errPtr[-lineLength+3] * 3;
+ }
+ }
+
+ /*
+ * Add the propagated error to the value of this
+ * component, quantize it, and store the
+ * quantization error.
+ */
+
+ c = ((c + 2056) >> 4) - 128 + *srcPtr++;
+ if (c < 0) {
+ c = 0;
+ } else if (c > 255) {
+ c = 255;
+ }
+ col[i] = colorPtr->colorQuant[i][c];
+ *errPtr++ = c - col[i];
+ }
+ } else {
+ /*
+ * Output is virtually continuous in this case, so
+ * don't bother dithering.
+ */
+
+ col[0] = *srcPtr++;
+ col[1] = *srcPtr++;
+ col[2] = *srcPtr++;
+ }
+ srcPtr++;
+
+ /*
+ * Translate the quantized component values into an X
+ * pixel value, and store it in the image.
+ */
+
+ i = colorPtr->redValues[col[0]]
+ + colorPtr->greenValues[col[1]]
+ + colorPtr->blueValues[col[2]];
+ if (colorPtr->flags & MAP_COLORS) {
+ i = colorPtr->pixelMap[i];
+ }
+ switch (bitsPerPixel) {
+ case NBBY:
+ *destBytePtr++ = i;
+ break;
+#ifndef __WIN32__
+ /*
+ * This case is not valid for Windows because the
+ * image format is different from the pixel format in
+ * Win32. Eventually we need to fix the image code in
+ * Tk to use the Windows native image ordering. This
+ * would speed up the image code for all of the common
+ * sizes.
+ */
+
+ case NBBY * sizeof(pixel):
+ *destLongPtr++ = i;
+ break;
+#endif
+ default:
+ XPutPixel(imagePtr, x - xStart, y - yStart,
+ (unsigned) i);
+ }
+ }
+
+ } else if (bitsPerPixel > 1) {
+ /*
+ * Multibit monochrome window. The operation here is similar
+ * to the color window case above, except that there is only
+ * one component. If the master image is in color, use the
+ * luminance computed as
+ * 0.344 * red + 0.5 * green + 0.156 * blue.
+ */
+
+ for (x = xStart; x < xEnd; ++x) {
+ c = (x > 0) ? errPtr[-1] * 7: 0;
+ if (y > 0) {
+ if (x > 0) {
+ c += errPtr[-lineLength-1];
+ }
+ c += errPtr[-lineLength] * 5;
+ if (x + 1 < masterPtr->width) {
+ c += errPtr[-lineLength+1] * 3;
+ }
+ }
+ c = ((c + 2056) >> 4) - 128;
+
+ if ((masterPtr->flags & COLOR_IMAGE) == 0) {
+ c += srcPtr[0];
+ } else {
+ c += (unsigned) (srcPtr[0] * 11 + srcPtr[1] * 16
+ + srcPtr[2] * 5 + 16) >> 5;
+ }
+ srcPtr += 4;
+
+ if (c < 0) {
+ c = 0;
+ } else if (c > 255) {
+ c = 255;
+ }
+ i = colorPtr->colorQuant[0][c];
+ *errPtr++ = c - i;
+ i = colorPtr->redValues[i];
+ switch (bitsPerPixel) {
+ case NBBY:
+ *destBytePtr++ = i;
+ break;
+#ifndef __WIN32__
+ /*
+ * This case is not valid for Windows because the
+ * image format is different from the pixel format in
+ * Win32. Eventually we need to fix the image code in
+ * Tk to use the Windows native image ordering. This
+ * would speed up the image code for all of the common
+ * sizes.
+ */
+
+ case NBBY * sizeof(pixel):
+ *destLongPtr++ = i;
+ break;
+#endif
+ default:
+ XPutPixel(imagePtr, x - xStart, y - yStart,
+ (unsigned) i);
+ }
+ }
+ } else {
+ /*
+ * 1-bit monochrome window. This is similar to the multibit
+ * monochrome case above, except that the quantization is
+ * simpler (we only have black = 0 and white = 255), and we
+ * produce an XY-Bitmap.
+ */
+
+ word = 0;
+ mask = firstBit;
+ for (x = xStart; x < xEnd; ++x) {
+ /*
+ * If we have accumulated a whole word, store it in the
+ * image and start a new word.
+ */
+
+ if (mask == 0) {
+ *destLongPtr++ = word;
+ mask = firstBit;
+ word = 0;
+ }
+
+ c = (x > 0) ? errPtr[-1] * 7: 0;
+ if (y > 0) {
+ if (x > 0) {
+ c += errPtr[-lineLength-1];
+ }
+ c += errPtr[-lineLength] * 5;
+ if (x + 1 < masterPtr->width) {
+ c += errPtr[-lineLength+1] * 3;
+ }
+ }
+ c = ((c + 2056) >> 4) - 128;
+
+ if ((masterPtr->flags & COLOR_IMAGE) == 0) {
+ c += srcPtr[0];
+ } else {
+ c += (unsigned)(srcPtr[0] * 11 + srcPtr[1] * 16
+ + srcPtr[2] * 5 + 16) >> 5;
+ }
+ srcPtr += 4;
+
+ if (c < 0) {
+ c = 0;
+ } else if (c > 255) {
+ c = 255;
+ }
+ if (c >= 128) {
+ word |= mask;
+ *errPtr++ = c - 255;
+ } else {
+ *errPtr++ = c;
+ }
+ mask = bigEndian? (mask >> 1): (mask << 1);
+ }
+ *destLongPtr = word;
+ }
+ srcLinePtr += masterPtr->width * 4;
+ errLinePtr += lineLength;
+ dstLinePtr += bytesPerLine;
+ }
+
+ /*
+ * Update the pixmap for this instance with the block of pixels that
+ * we have just computed.
+ */
+
+ TkPutImage(colorPtr->pixelMap, colorPtr->numColors,
+ instancePtr->display, instancePtr->pixels,
+ instancePtr->gc, imagePtr, 0, 0, xStart, yStart,
+ (unsigned) width, (unsigned) nLines);
+ yStart = yEnd;
+ }
+
+ ckfree(imagePtr->data);
+ imagePtr->data = NULL;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkImgResetDither --
+ *
+ * This function is called to eliminate the content of a photo instance's
+ * dither error buffer. It's called when the overall image is blanked.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The instance's dither buffer gets cleared.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkImgResetDither(
+ PhotoInstance *instancePtr)
+{
+ if (instancePtr->error) {
+ memset(instancePtr->error, 0,
+ /*(size_t)*/ (instancePtr->masterPtr->width
+ * instancePtr->masterPtr->height * 3 * sizeof(schar)));
+ }
+}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */
diff --git a/generic/tkImgPhoto.c b/generic/tkImgPhoto.c
index 13b3a4c..74bc6f0 100644
--- a/generic/tkImgPhoto.c
+++ b/generic/tkImgPhoto.c
@@ -17,211 +17,13 @@
* Department of Computer Science,
* Australian National University.
*
- * RCS: @(#) $Id: tkImgPhoto.c,v 1.78 2008/07/23 23:24:21 nijtmans Exp $
+ * RCS: @(#) $Id: tkImgPhoto.c,v 1.79 2008/08/25 11:44:04 dkf Exp $
*/
-#include "tkInt.h"
+#include "tclInt.h"
+#include "tkImgPhoto.h"
#include <ctype.h>
-#ifdef __WIN32__
-#include "tkWinInt.h"
-#endif
-
-/*
- * Declaration for internal Xlib function used here:
- */
-
-extern int _XInitImageFuncPtrs(XImage *image);
-
-/*
- * A signed 8-bit integral type. If chars are unsigned and the compiler isn't
- * an ANSI one, then we have to use short instead (which wastes space) to get
- * signed behavior.
- */
-
-#if defined(__STDC__) || defined(_AIX)
- typedef signed char schar;
-#else
-# ifndef __CHAR_UNSIGNED__
- typedef char schar;
-# else
- typedef short schar;
-# endif
-#endif
-
-/*
- * An unsigned 32-bit integral type, used for pixel values. We use int rather
- * than long here to accommodate those systems where longs are 64 bits.
- */
-
-typedef unsigned int pixel;
-
-/*
- * The maximum number of pixels to transmit to the server in a single
- * XPutImage call.
- */
-
-#define MAX_PIXELS 65536
-
-/*
- * The set of colors required to display a photo image in a window depends on:
- * - the visual used by the window
- * - the palette, which specifies how many levels of each primary color to
- * use, and
- * - the gamma value for the image.
- *
- * Pixel values allocated for specific colors are valid only for the colormap
- * in which they were allocated. Sets of pixel values allocated for displaying
- * photos are re-used in other windows if possible, that is, if the display,
- * colormap, palette and gamma values match. A hash table is used to locate
- * these sets of pixel values, using the following data structure as key:
- */
-
-typedef struct {
- Display *display; /* Qualifies the colormap resource ID. */
- Colormap colormap; /* Colormap that the windows are using. */
- double gamma; /* Gamma exponent value for images. */
- Tk_Uid palette; /* Specifies how many shades of each primary
- * we want to allocate. */
-} ColorTableId;
-
-/*
- * For a particular (display, colormap, palette, gamma) combination, a data
- * structure of the following type is used to store the allocated pixel values
- * and other information:
- */
-
-typedef struct ColorTable {
- ColorTableId id; /* Information used in selecting this color
- * table. */
- int flags; /* See below. */
- int refCount; /* Number of instances using this map. */
- int liveRefCount; /* Number of instances which are actually in
- * use, using this map. */
- int numColors; /* Number of colors allocated for this map. */
-
- XVisualInfo visualInfo; /* Information about the visual for windows
- * using this color table. */
-
- pixel redValues[256]; /* Maps 8-bit values of red intensity to a
- * pixel value or index in pixelMap. */
- pixel greenValues[256]; /* Ditto for green intensity. */
- pixel blueValues[256]; /* Ditto for blue intensity. */
- unsigned long *pixelMap; /* Actual pixel values allocated. */
-
- unsigned char colorQuant[3][256];
- /* Maps 8-bit intensities to quantized
- * intensities. The first index is 0 for red,
- * 1 for green, 2 for blue. */
-} ColorTable;
-
-/*
- * Bit definitions for the flags field of a ColorTable.
- * BLACK_AND_WHITE: 1 means only black and white colors are
- * available.
- * COLOR_WINDOW: 1 means a full 3-D color cube has been
- * allocated.
- * DISPOSE_PENDING: 1 means a call to DisposeColorTable has been
- * scheduled as an idle handler, but it hasn't
- * been invoked yet.
- * MAP_COLORS: 1 means pixel values should be mapped through
- * pixelMap.
- */
-
-#ifdef COLOR_WINDOW
-#undef COLOR_WINDOW
-#endif
-
-#define BLACK_AND_WHITE 1
-#define COLOR_WINDOW 2
-#define DISPOSE_PENDING 4
-#define MAP_COLORS 8
-
-/*
- * Definition of the data associated with each photo image master.
- */
-
-typedef struct PhotoMaster {
- Tk_ImageMaster tkMaster; /* Tk's token for image master. NULL means the
- * image is being deleted. */
- Tcl_Interp *interp; /* Interpreter associated with the application
- * using this image. */
- Tcl_Command imageCmd; /* Token for image command (used to delete it
- * when the image goes away). NULL means the
- * image command has already been deleted. */
- int flags; /* Sundry flags, defined below. */
- int width, height; /* Dimensions of image. */
- int userWidth, userHeight; /* User-declared image dimensions. */
- Tk_Uid palette; /* User-specified default palette for
- * instances of this image. */
- double gamma; /* Display gamma value to correct for. */
- char *fileString; /* Name of file to read into image. */
- Tcl_Obj *dataString; /* Object to use as contents of image. */
- Tcl_Obj *format; /* User-specified format of data in image file
- * or string value. */
- unsigned char *pix32; /* Local storage for 32-bit image. */
- int ditherX, ditherY; /* Location of first incorrectly dithered
- * pixel in image. */
- TkRegion validRegion; /* Tk region indicating which parts of the
- * image have valid image data. */
- struct PhotoInstance *instancePtr;
- /* First in the list of instances associated
- * with this master. */
-} PhotoMaster;
-
-/*
- * Bit definitions for the flags field of a PhotoMaster.
- * COLOR_IMAGE: 1 means that the image has different color
- * components.
- * IMAGE_CHANGED: 1 means that the instances of this image need
- * to be redithered.
- * COMPLEX_ALPHA: 1 means that the instances of this image have
- * alpha values that aren't 0 or 255, and so need
- * the copy-merge-replace renderer .
- */
-
-#define COLOR_IMAGE 1
-#define IMAGE_CHANGED 2
-#define COMPLEX_ALPHA 4
-
-/*
- * Flag to OR with the compositing rule to indicate that the source, despite
- * having an alpha channel, has simple alpha.
- */
-
-#define SOURCE_IS_SIMPLE_ALPHA_PHOTO 0x10000000
-
-/*
- * The following data structure represents all of the instances of a photo
- * image in windows on a given screen that are using the same colormap.
- */
-
-typedef struct PhotoInstance {
- PhotoMaster *masterPtr; /* Pointer to master for image. */
- Display *display; /* Display for windows using this instance. */
- Colormap colormap; /* The image may only be used in windows with
- * this particular colormap. */
- struct PhotoInstance *nextPtr;
- /* Pointer to the next instance in the list of
- * instances associated with this master. */
- int refCount; /* Number of instances using this structure. */
- Tk_Uid palette; /* Palette for these particular instances. */
- double gamma; /* Gamma value for these instances. */
- Tk_Uid defaultPalette; /* Default palette to use if a palette is not
- * specified for the master. */
- ColorTable *colorTablePtr; /* Pointer to information about colors
- * allocated for image display in windows like
- * this one. */
- Pixmap pixels; /* X pixmap containing dithered image. */
- int width, height; /* Dimensions of the pixmap. */
- schar *error; /* Error image, used in dithering. */
- XImage *imagePtr; /* Image structure for converted pixels. */
- XVisualInfo visualInfo; /* Information about the visual that these
- * windows are using. */
- GC gc; /* Graphics context for writing images to the
- * pixmap. */
-} PhotoInstance;
-
/*
* The following data structure is used to return information from
* ParseSubcommandOptions:
@@ -305,12 +107,6 @@ static int ImgPhotoCreate(Tcl_Interp *interp, char *name,
int objc, Tcl_Obj *const objv[],
Tk_ImageType *typePtr, Tk_ImageMaster master,
ClientData *clientDataPtr);
-static ClientData ImgPhotoGet(Tk_Window tkwin, ClientData clientData);
-static void ImgPhotoDisplay(ClientData clientData,
- Display *display, Drawable drawable,
- int imageX, int imageY, int width, int height,
- int drawableX, int drawableY);
-static void ImgPhotoFree(ClientData clientData, Display *display);
static void ImgPhotoDelete(ClientData clientData);
static int ImgPhotoPostscript(ClientData clientData,
Tcl_Interp *interp, Tk_Window tkwin,
@@ -324,9 +120,9 @@ static int ImgPhotoPostscript(ClientData clientData,
Tk_ImageType tkPhotoImageType = {
"photo", /* name */
ImgPhotoCreate, /* createProc */
- ImgPhotoGet, /* getProc */
- ImgPhotoDisplay, /* displayProc */
- ImgPhotoFree, /* freeProc */
+ TkImgPhotoGet, /* getProc */
+ TkImgPhotoDisplay, /* displayProc */
+ TkImgPhotoFree, /* freeProc */
ImgPhotoDelete, /* deleteProc */
ImgPhotoPostscript, /* postscriptProc */
NULL /* nextPtr */
@@ -372,24 +168,6 @@ static Tk_ConfigSpec configSpecs[] = {
};
/*
- * Hash table used to hash from (display, colormap, palette, gamma) to
- * ColorTable address.
- */
-
-static Tcl_HashTable imgPhotoColorHash;
-static int imgPhotoColorHashInitialized;
-#define N_COLOR_HASH (sizeof(ColorTableId) / sizeof(int))
-
-/*
- * Implementation of the Porter-Duff Source-Over compositing rule.
- */
-
-#define PD_SRC_OVER(srcColor,srcAlpha,dstColor,dstAlpha) \
- (srcColor*srcAlpha/255) + dstAlpha*(255-srcAlpha)/255*dstColor/255
-#define PD_SRC_OVER_ALPHA(srcAlpha,dstAlpha) \
- (srcAlpha + (255-srcAlpha)*dstAlpha/255)
-
-/*
* Forward declarations
*/
@@ -404,29 +182,15 @@ static void ImgPhotoCmdDeletedProc(ClientData clientData);
static int ImgPhotoConfigureMaster(Tcl_Interp *interp,
PhotoMaster *masterPtr, int objc,
Tcl_Obj *const objv[], int flags);
-static void ImgPhotoConfigureInstance(PhotoInstance *instancePtr);
static int ToggleComplexAlphaIfNeeded(PhotoMaster *mPtr);
-static void ImgPhotoBlendComplexAlpha(XImage *bgImg,
- PhotoInstance *iPtr, int xOffset, int yOffset,
- int width, int height);
static int ImgPhotoSetSize(PhotoMaster *masterPtr, int width,
int height);
-static void ImgPhotoInstanceSetSize(PhotoInstance *instancePtr);
static int ImgStringWrite(Tcl_Interp *interp,
Tcl_Obj *formatString,
Tk_PhotoImageBlock *blockPtr);
static char * ImgGetPhoto(PhotoMaster *masterPtr,
Tk_PhotoImageBlock *blockPtr,
struct SubcommandOptions *optPtr);
-static int IsValidPalette(PhotoInstance *instancePtr,
- const char *palette);
-static int CountBits(pixel mask);
-static void GetColorTable(PhotoInstance *instancePtr);
-static void FreeColorTable(ColorTable *colorPtr, int force);
-static void AllocateColors(ColorTable *colorPtr);
-static void DisposeColorTable(ClientData clientData);
-static void DisposeInstance(ClientData clientData);
-static int ReclaimColors(ColorTableId *id, int numColors);
static int MatchFileFormat(Tcl_Interp *interp, Tcl_Channel chan,
char *fileName, Tcl_Obj *formatString,
Tk_PhotoImageFormat **imageFormatPtr,
@@ -436,15 +200,8 @@ static int MatchStringFormat(Tcl_Interp *interp, Tcl_Obj *data,
Tk_PhotoImageFormat **imageFormatPtr,
int *widthPtr, int *heightPtr, int *oldformat);
static Tcl_ObjCmdProc * PhotoOptionFind(Tcl_Interp *interp, Tcl_Obj *obj);
-static void DitherInstance(PhotoInstance *instancePtr, int x,
- int y, int width, int height);
static void PhotoOptionCleanupProc(ClientData clientData,
Tcl_Interp *interp);
-
-#undef MIN
-#define MIN(a, b) ((a) < (b)? (a): (b))
-#undef MAX
-#define MAX(a, b) ((a) > (b)? (a): (b))
/*
*----------------------------------------------------------------------
@@ -467,19 +224,19 @@ PhotoFormatThreadExitProc(
ClientData clientData) /* not used */
{
Tk_PhotoImageFormat *freePtr;
- ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
+ ThreadSpecificData *tsdPtr =
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
while (tsdPtr->oldFormatList != NULL) {
freePtr = tsdPtr->oldFormatList;
tsdPtr->oldFormatList = tsdPtr->oldFormatList->nextPtr;
- ckfree((char *) freePtr->name);
+ ckfree(freePtr->name);
ckfree((char *) freePtr);
}
while (tsdPtr->formatList != NULL) {
freePtr = tsdPtr->formatList;
tsdPtr->formatList = tsdPtr->formatList->nextPtr;
- ckfree((char *) freePtr->name);
+ ckfree(freePtr->name);
ckfree((char *) freePtr);
}
}
@@ -512,7 +269,7 @@ Tk_CreateOldPhotoImageFormat(
* Tk_CreatePhotoImageFormat previously. */
{
Tk_PhotoImageFormat *copyPtr;
- ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
+ ThreadSpecificData *tsdPtr =
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
if (!tsdPtr->initialized) {
@@ -521,7 +278,7 @@ Tk_CreateOldPhotoImageFormat(
}
copyPtr = (Tk_PhotoImageFormat *) ckalloc(sizeof(Tk_PhotoImageFormat));
*copyPtr = *formatPtr;
- copyPtr->name = (char *) ckalloc((unsigned) (strlen(formatPtr->name) + 1));
+ copyPtr->name = ckalloc((unsigned) (strlen(formatPtr->name) + 1));
strcpy(copyPtr->name, formatPtr->name);
copyPtr->nextPtr = tsdPtr->oldFormatList;
tsdPtr->oldFormatList = copyPtr;
@@ -536,7 +293,7 @@ Tk_CreatePhotoImageFormat(
* Tk_CreatePhotoImageFormat previously. */
{
Tk_PhotoImageFormat *copyPtr;
- ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
+ ThreadSpecificData *tsdPtr =
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
if (!tsdPtr->initialized) {
@@ -545,7 +302,7 @@ Tk_CreatePhotoImageFormat(
}
copyPtr = (Tk_PhotoImageFormat *) ckalloc(sizeof(Tk_PhotoImageFormat));
*copyPtr = *formatPtr;
- copyPtr->name = (char *) ckalloc((unsigned) (strlen(formatPtr->name) + 1));
+ copyPtr->name = ckalloc((unsigned) (strlen(formatPtr->name) + 1));
strcpy(copyPtr->name, formatPtr->name);
if (isupper((unsigned char) *formatPtr->name)) {
copyPtr->nextPtr = tsdPtr->oldFormatList;
@@ -663,7 +420,7 @@ ImgPhotoCmd(
int imageWidth, imageHeight, matched, length, oldformat = 0;
Tcl_Channel chan;
Tk_PhotoHandle srcHandle;
- ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
+ ThreadSpecificData *tsdPtr =
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
if (objc < 2) {
@@ -673,8 +430,8 @@ ImgPhotoCmd(
if (Tcl_GetIndexFromObj(interp, objv[1], photoOptions, "option", 0,
&index) != TCL_OK) {
- Tcl_ObjCmdProc *proc;
- proc = PhotoOptionFind(interp, objv[1]);
+ Tcl_ObjCmdProc *proc = PhotoOptionFind(interp, objv[1]);
+
if (proc == NULL) {
return TCL_ERROR;
}
@@ -983,23 +740,25 @@ ImgPhotoCmd(
if (oldformat) {
Tcl_DString buffer;
+ typedef int (*OldStringWriteProc)(Tcl_Interp *interp,
+ Tcl_DString *dataPtr, char *formatString,
+ Tk_PhotoImageBlock *blockPtr);
Tcl_DStringInit(&buffer);
- result = ((int (*) (Tcl_Interp *interp,
- Tcl_DString *dataPtr, char *formatString,
- Tk_PhotoImageBlock *blockPtr)) stringWriteProc)
- (interp, &buffer, Tcl_GetString(options.format), &block);
+ result = ((OldStringWriteProc) stringWriteProc)(interp, &buffer,
+ Tcl_GetString(options.format), &block);
if (result == TCL_OK) {
Tcl_DStringResult(interp, &buffer);
} else {
Tcl_DStringFree(&buffer);
}
} else {
-
- result = ((int (*) (Tcl_Interp *interp,
+ typedef int (*NewStringWriteProc)(Tcl_Interp *interp,
Tcl_Obj *formatString, Tk_PhotoImageBlock *blockPtr,
- void *dummy)) stringWriteProc)
- (interp, options.format, &block, NULL);
+ void *dummy);
+
+ result = ((NewStringWriteProc) stringWriteProc)(interp,
+ options.format, &block, NULL);
}
if (options.background) {
Tk_FreeColor(options.background);
@@ -1083,10 +842,9 @@ ImgPhotoCmd(
}
data = (Tcl_Obj *) Tcl_GetString(data);
}
- if ((*imageFormat->stringReadProc)(interp, data,
- format, (Tk_PhotoHandle) masterPtr,
- options.toX, options.toY, imageWidth, imageHeight,
- 0, 0) != TCL_OK) {
+ if (imageFormat->stringReadProc(interp, data, format,
+ (Tk_PhotoHandle) masterPtr, options.toX, options.toY,
+ imageWidth, imageHeight, 0, 0) != TCL_OK) {
return TCL_ERROR;
}
masterPtr->flags |= IMAGE_CHANGED;
@@ -1313,7 +1071,7 @@ ImgPhotoCmd(
if (oldformat && format) {
format = (Tcl_Obj *) Tcl_GetString(format);
}
- result = (*imageFormat->fileReadProc)(interp, chan,
+ result = imageFormat->fileReadProc(interp, chan,
Tcl_GetString(options.name),
format, (Tk_PhotoHandle) masterPtr, options.toX,
options.toY, width, height, options.fromX, options.fromY);
@@ -1585,7 +1343,7 @@ ImgPhotoCmd(
if (oldformat && format) {
format = (Tcl_Obj *) Tcl_GetString(options.format);
}
- result = (*imageFormat->fileWriteProc)(interp,
+ result = imageFormat->fileWriteProc(interp,
Tcl_GetString(options.name), format, &block);
if (options.background) {
Tk_FreeColor(options.background);
@@ -1910,7 +1668,7 @@ ImgPhotoConfigureMaster(
Tk_PhotoImageFormat *imageFormat;
const char **args;
- args = (const char **) ckalloc((objc + 1) * sizeof(char *));
+ args = TclStackAlloc(interp, (objc + 1) * sizeof(char *));
for (i = 0, j = 0; i < objc; i++,j++) {
args[j] = Tcl_GetStringFromObj(objv[i], &length);
if ((length > 1) && (args[j][0] == '-')) {
@@ -1967,10 +1725,10 @@ ImgPhotoConfigureMaster(
if (Tk_ConfigureWidget(interp, Tk_MainWindow(interp), configSpecs,
j, args, (char *) masterPtr, flags) != TCL_OK) {
- ckfree((char *) args);
+ TclStackFree(interp, args);
goto errorExit;
}
- ckfree((char *) args);
+ TclStackFree(interp, args);
/*
* Regard the empty string for -file, -data or -format as the null value.
@@ -2034,7 +1792,6 @@ ImgPhotoConfigureMaster(
if ((masterPtr->fileString != NULL)
&& ((masterPtr->fileString != oldFileString)
|| (masterPtr->format != oldFormat))) {
-
/*
* Prevent file system access in a safe interpreter.
*/
@@ -2074,7 +1831,7 @@ ImgPhotoConfigureMaster(
if (oldformat && tempformat) {
tempformat = (Tcl_Obj *) Tcl_GetString(tempformat);
}
- result = (*imageFormat->fileReadProc)(interp, chan,
+ result = imageFormat->fileReadProc(interp, chan,
masterPtr->fileString, tempformat, (Tk_PhotoHandle) masterPtr,
0, 0, imageWidth, imageHeight, 0, 0);
Tcl_Close(NULL, chan);
@@ -2108,9 +1865,9 @@ ImgPhotoConfigureMaster(
}
tempdata = (Tcl_Obj *) Tcl_GetString(tempdata);
}
- if ((*imageFormat->stringReadProc)(interp, tempdata,
- tempformat, (Tk_PhotoHandle) masterPtr,
- 0, 0, imageWidth, imageHeight, 0, 0) != TCL_OK) {
+ if (imageFormat->stringReadProc(interp, tempdata, tempformat,
+ (Tk_PhotoHandle) masterPtr, 0, 0, imageWidth, imageHeight,
+ 0, 0) != TCL_OK) {
goto errorExit;
}
@@ -2139,7 +1896,7 @@ ImgPhotoConfigureMaster(
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
instancePtr = instancePtr->nextPtr) {
- ImgPhotoConfigureInstance(instancePtr);
+ TkImgPhotoConfigureInstance(instancePtr);
}
/*
@@ -2174,327 +1931,6 @@ ImgPhotoConfigureMaster(
/*
*----------------------------------------------------------------------
*
- * ImgPhotoConfigureInstance --
- *
- * This function is called to create displaying information for a photo
- * image instance based on the configuration information in the master.
- * It is invoked both when new instances are created and when the master
- * is reconfigured.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Generates errors via Tcl_BackgroundError if there are problems in
- * setting up the instance.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-ImgPhotoConfigureInstance(
- PhotoInstance *instancePtr) /* Instance to reconfigure. */
-{
- PhotoMaster *masterPtr = instancePtr->masterPtr;
- XImage *imagePtr;
- int bitsPerPixel;
- ColorTable *colorTablePtr;
- XRectangle validBox;
-
- /*
- * If the -palette configuration option has been set for the master, use
- * the value specified for our palette, but only if it is a valid palette
- * for our windows. Use the gamma value specified the master.
- */
-
- if ((masterPtr->palette && masterPtr->palette[0])
- && IsValidPalette(instancePtr, masterPtr->palette)) {
- instancePtr->palette = masterPtr->palette;
- } else {
- instancePtr->palette = instancePtr->defaultPalette;
- }
- instancePtr->gamma = masterPtr->gamma;
-
- /*
- * If we don't currently have a color table, or if the one we have no
- * longer applies (e.g. because our palette or gamma has changed), get a
- * new one.
- */
-
- colorTablePtr = instancePtr->colorTablePtr;
- if ((colorTablePtr == NULL)
- || (instancePtr->colormap != colorTablePtr->id.colormap)
- || (instancePtr->palette != colorTablePtr->id.palette)
- || (instancePtr->gamma != colorTablePtr->id.gamma)) {
- /*
- * Free up our old color table, and get a new one.
- */
-
- if (colorTablePtr != NULL) {
- colorTablePtr->liveRefCount -= 1;
- FreeColorTable(colorTablePtr, 0);
- }
- GetColorTable(instancePtr);
-
- /*
- * Create a new XImage structure for sending data to the X server, if
- * necessary.
- */
-
- if (instancePtr->colorTablePtr->flags & BLACK_AND_WHITE) {
- bitsPerPixel = 1;
- } else {
- bitsPerPixel = instancePtr->visualInfo.depth;
- }
-
- if ((instancePtr->imagePtr == NULL)
- || (instancePtr->imagePtr->bits_per_pixel != bitsPerPixel)) {
- if (instancePtr->imagePtr != NULL) {
- XDestroyImage(instancePtr->imagePtr);
- }
- imagePtr = XCreateImage(instancePtr->display,
- instancePtr->visualInfo.visual, (unsigned) bitsPerPixel,
- (bitsPerPixel > 1? ZPixmap: XYBitmap), 0, NULL,
- 1, 1, 32, 0);
- instancePtr->imagePtr = imagePtr;
-
- /*
- * We create images using the local host's endianness, rather than
- * the endianness of the server; otherwise we would have to
- * byte-swap any 16 or 32 bit values that we store in the image
- * if the server's endianness is different from ours.
- */
-
- if (imagePtr != NULL) {
-#ifdef WORDS_BIGENDIAN
- imagePtr->byte_order = MSBFirst;
-#else
- imagePtr->byte_order = LSBFirst;
-#endif
- _XInitImageFuncPtrs(imagePtr);
- }
- }
- }
-
- /*
- * If the user has specified a width and/or height for the master which is
- * different from our current width/height, set the size to the values
- * specified by the user. If we have no pixmap, we do this also, since it
- * has the side effect of allocating a pixmap for us.
- */
-
- if ((instancePtr->pixels == None) || (instancePtr->error == NULL)
- || (instancePtr->width != masterPtr->width)
- || (instancePtr->height != masterPtr->height)) {
- ImgPhotoInstanceSetSize(instancePtr);
- }
-
- /*
- * Redither this instance if necessary.
- */
-
- if ((masterPtr->flags & IMAGE_CHANGED)
- || (instancePtr->colorTablePtr != colorTablePtr)) {
- TkClipBox(masterPtr->validRegion, &validBox);
- if ((validBox.width > 0) && (validBox.height > 0)) {
- DitherInstance(instancePtr, validBox.x, validBox.y,
- validBox.width, validBox.height);
- }
- }
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * ImgPhotoGet --
- *
- * This function is called for each use of a photo image in a widget.
- *
- * Results:
- * The return value is a token for the instance, which is passed back to
- * us in calls to ImgPhotoDisplay and ImgPhotoFree.
- *
- * Side effects:
- * A data structure is set up for the instance (or, an existing instance
- * is re-used for the new one).
- *
- *----------------------------------------------------------------------
- */
-
-static ClientData
-ImgPhotoGet(
- Tk_Window tkwin, /* Window in which the instance will be
- * used. */
- ClientData masterData) /* Pointer to our master structure for the
- * image. */
-{
- PhotoMaster *masterPtr = masterData;
- PhotoInstance *instancePtr;
- Colormap colormap;
- int mono, nRed, nGreen, nBlue, numVisuals;
- XVisualInfo visualInfo, *visInfoPtr;
- char buf[TCL_INTEGER_SPACE * 3];
- XColor *white, *black;
- XGCValues gcValues;
-
- /*
- * Table of "best" choices for palette for PseudoColor displays with
- * between 3 and 15 bits/pixel.
- */
-
- static const int paletteChoice[13][3] = {
- /* #red, #green, #blue */
- {2, 2, 2, /* 3 bits, 8 colors */},
- {2, 3, 2, /* 4 bits, 12 colors */},
- {3, 4, 2, /* 5 bits, 24 colors */},
- {4, 5, 3, /* 6 bits, 60 colors */},
- {5, 6, 4, /* 7 bits, 120 colors */},
- {7, 7, 4, /* 8 bits, 198 colors */},
- {8, 10, 6, /* 9 bits, 480 colors */},
- {10, 12, 8, /* 10 bits, 960 colors */},
- {14, 15, 9, /* 11 bits, 1890 colors */},
- {16, 20, 12, /* 12 bits, 3840 colors */},
- {20, 24, 16, /* 13 bits, 7680 colors */},
- {26, 30, 20, /* 14 bits, 15600 colors */},
- {32, 32, 30, /* 15 bits, 30720 colors */}
- };
-
- /*
- * See if there is already an instance for windows using the same
- * colormap. If so then just re-use it.
- */
-
- colormap = Tk_Colormap(tkwin);
- for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
- instancePtr = instancePtr->nextPtr) {
- if ((colormap == instancePtr->colormap)
- && (Tk_Display(tkwin) == instancePtr->display)) {
- /*
- * Re-use this instance.
- */
-
- if (instancePtr->refCount == 0) {
- /*
- * We are resurrecting this instance.
- */
-
- Tcl_CancelIdleCall(DisposeInstance, instancePtr);
- if (instancePtr->colorTablePtr != NULL) {
- FreeColorTable(instancePtr->colorTablePtr, 0);
- }
- GetColorTable(instancePtr);
- }
- instancePtr->refCount++;
- return instancePtr;
- }
- }
-
- /*
- * The image isn't already in use in a window with the same colormap. Make
- * a new instance of the image.
- */
-
- instancePtr = (PhotoInstance *) ckalloc(sizeof(PhotoInstance));
- instancePtr->masterPtr = masterPtr;
- instancePtr->display = Tk_Display(tkwin);
- instancePtr->colormap = Tk_Colormap(tkwin);
- Tk_PreserveColormap(instancePtr->display, instancePtr->colormap);
- instancePtr->refCount = 1;
- instancePtr->colorTablePtr = NULL;
- instancePtr->pixels = None;
- instancePtr->error = NULL;
- instancePtr->width = 0;
- instancePtr->height = 0;
- instancePtr->imagePtr = 0;
- instancePtr->nextPtr = masterPtr->instancePtr;
- masterPtr->instancePtr = instancePtr;
-
- /*
- * Obtain information about the visual and decide on the default palette.
- */
-
- visualInfo.screen = Tk_ScreenNumber(tkwin);
- visualInfo.visualid = XVisualIDFromVisual(Tk_Visual(tkwin));
- visInfoPtr = XGetVisualInfo(Tk_Display(tkwin),
- VisualScreenMask | VisualIDMask, &visualInfo, &numVisuals);
- if (visInfoPtr == NULL) {
- Tcl_Panic("ImgPhotoGet couldn't find visual for window");
- }
-
- nRed = 2;
- nGreen = nBlue = 0;
- mono = 1;
- instancePtr->visualInfo = *visInfoPtr;
- switch (visInfoPtr->class) {
- case DirectColor:
- case TrueColor:
- nRed = 1 << CountBits(visInfoPtr->red_mask);
- nGreen = 1 << CountBits(visInfoPtr->green_mask);
- nBlue = 1 << CountBits(visInfoPtr->blue_mask);
- mono = 0;
- break;
- case PseudoColor:
- case StaticColor:
- if (visInfoPtr->depth > 15) {
- nRed = 32;
- nGreen = 32;
- nBlue = 32;
- mono = 0;
- } else if (visInfoPtr->depth >= 3) {
- const int *ip = paletteChoice[visInfoPtr->depth - 3];
-
- nRed = ip[0];
- nGreen = ip[1];
- nBlue = ip[2];
- mono = 0;
- }
- break;
- case GrayScale:
- case StaticGray:
- nRed = 1 << visInfoPtr->depth;
- break;
- }
- XFree((char *) visInfoPtr);
-
- sprintf(buf, ((mono) ? "%d": "%d/%d/%d"), nRed, nGreen, nBlue);
- instancePtr->defaultPalette = Tk_GetUid(buf);
-
- /*
- * Make a GC with background = black and foreground = white.
- */
-
- white = Tk_GetColor(masterPtr->interp, tkwin, "white");
- black = Tk_GetColor(masterPtr->interp, tkwin, "black");
- gcValues.foreground = (white != NULL)? white->pixel:
- WhitePixelOfScreen(Tk_Screen(tkwin));
- gcValues.background = (black != NULL)? black->pixel:
- BlackPixelOfScreen(Tk_Screen(tkwin));
- gcValues.graphics_exposures = False;
- instancePtr->gc = Tk_GetGC(tkwin,
- GCForeground|GCBackground|GCGraphicsExposures, &gcValues);
-
- /*
- * Set configuration options and finish the initialization of the
- * instance. This will also dither the image if necessary.
- */
-
- ImgPhotoConfigureInstance(instancePtr);
-
- /*
- * If this is the first instance, must set the size of the image.
- */
-
- if (instancePtr->nextPtr == NULL) {
- Tk_ImageChanged(masterPtr->tkMaster, 0, 0, 0, 0,
- masterPtr->width, masterPtr->height);
- }
-
- return instancePtr;
-}
-
-/*
- *----------------------------------------------------------------------
- *
* ToggleComplexAlphaIfNeeded --
*
* This function is called when an image is modified to check if any
@@ -2538,348 +1974,6 @@ ToggleComplexAlphaIfNeeded(
/*
*----------------------------------------------------------------------
*
- * ImgPhotoBlendComplexAlpha --
- *
- * This function is called when an image with partially transparent
- * pixels must be drawn over another image. It blends the photo data onto
- * a local copy of the surface that we are drawing on, *including* the
- * pixels drawn by everything that should be drawn underneath the image.
- *
- * Much of this code has hard-coded values in for speed because this
- * routine is performance critical for complex image drawing.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Background image passed in gets drawn over with image data.
- *
- * Notes:
- * This should work on all platforms that set mask and shift data
- * properly from the visualInfo. RGB is really only a 24+ bpp version
- * whereas RGB15 is the correct version and works for 15bpp+, but it
- * slower, so it's only used for 15bpp+.
- *
- * Note that Win32 pre-defines those operations that we really need.
- *
- *----------------------------------------------------------------------
- */
-
-#ifndef __WIN32__
-#define GetRValue(rgb) (UCHAR(((rgb) & red_mask) >> red_shift))
-#define GetGValue(rgb) (UCHAR(((rgb) & green_mask) >> green_shift))
-#define GetBValue(rgb) (UCHAR(((rgb) & blue_mask) >> blue_shift))
-#define RGB(r, g, b) ((unsigned)( \
- (UCHAR(r) << red_shift) | \
- (UCHAR(g) << green_shift) | \
- (UCHAR(b) << blue_shift) ))
-#define RGB15(r, g, b) ((unsigned)( \
- (((r) * red_mask / 255) & red_mask) | \
- (((g) * green_mask / 255) & green_mask) | \
- (((b) * blue_mask / 255) & blue_mask) ))
-#endif /* !__WIN32__ */
-
-static void
-ImgPhotoBlendComplexAlpha(
- XImage *bgImg, /* Background image to draw on. */
- PhotoInstance *iPtr, /* Image instance to draw. */
- int xOffset, int yOffset, /* X & Y offset into image instance to
- * draw. */
- int width, int height) /* Width & height of image to draw. */
-{
- int x, y, line;
- unsigned long pixel;
- unsigned char r, g, b, alpha, unalpha, *masterPtr;
- unsigned char *alphaAr = iPtr->masterPtr->pix32;
-
- /*
- * This blending is an integer version of the Source-Over compositing rule
- * (see Porter&Duff, "Compositing Digital Images", proceedings of SIGGRAPH
- * 1984) that has been hard-coded (for speed) to work with targetting a
- * solid surface.
- *
- * The 'unalpha' field must be 255-alpha; it is separated out to encourage
- * more efficient compilation.
- */
-
-#define ALPHA_BLEND(bgPix, imgPix, alpha, unalpha) \
- ((bgPix * unalpha + imgPix * alpha) / 255)
-
- /*
- * We have to get the mask and shift info from the visual on non-Win32 so
- * that the macros Get*Value(), RGB() and RGB15() work correctly. This
- * might be cached for better performance.
- */
-
-#ifndef __WIN32__
- unsigned long red_mask, green_mask, blue_mask;
- unsigned long red_shift, green_shift, blue_shift;
- Visual *visual = iPtr->visualInfo.visual;
-
- red_mask = visual->red_mask;
- green_mask = visual->green_mask;
- blue_mask = visual->blue_mask;
- red_shift = 0;
- green_shift = 0;
- blue_shift = 0;
- while ((0x0001 & (red_mask >> red_shift)) == 0) {
- red_shift++;
- }
- while ((0x0001 & (green_mask >> green_shift)) == 0) {
- green_shift++;
- }
- while ((0x0001 & (blue_mask >> blue_shift)) == 0) {
- blue_shift++;
- }
-#endif /* !__WIN32__ */
-
- /*
- * Only UNIX requires the special case for <24bpp. It varies with 3 extra
- * shifts and uses RGB15. The 24+bpp version could also then be further
- * optimized.
- */
-
-#if !(defined(__WIN32__) || defined(MAC_OSX_TK))
- if (bgImg->depth < 24) {
- unsigned char red_mlen, green_mlen, blue_mlen;
-
- red_mlen = 8 - CountBits(red_mask >> red_shift);
- green_mlen = 8 - CountBits(green_mask >> green_shift);
- blue_mlen = 8 - CountBits(blue_mask >> blue_shift);
- for (y = 0; y < height; y++) {
- line = (y + yOffset) * iPtr->masterPtr->width;
- for (x = 0; x < width; x++) {
- masterPtr = alphaAr + ((line + x + xOffset) * 4);
- alpha = masterPtr[3];
-
- /*
- * Ignore pixels that are fully transparent
- */
-
- if (alpha) {
- /*
- * We could perhaps be more efficient than XGetPixel for
- * 24 and 32 bit displays, but this seems "fast enough".
- */
-
- r = masterPtr[0];
- g = masterPtr[1];
- b = masterPtr[2];
- if (alpha != 255) {
- /*
- * Only blend pixels that have some transparency
- */
-
- unsigned char ra, ga, ba;
-
- pixel = XGetPixel(bgImg, x, y);
- ra = GetRValue(pixel) << red_mlen;
- ga = GetGValue(pixel) << green_mlen;
- ba = GetBValue(pixel) << blue_mlen;
- unalpha = 255 - alpha; /* Calculate once. */
- r = ALPHA_BLEND(ra, r, alpha, unalpha);
- g = ALPHA_BLEND(ga, g, alpha, unalpha);
- b = ALPHA_BLEND(ba, b, alpha, unalpha);
- }
- XPutPixel(bgImg, x, y, RGB15(r, g, b));
- }
- }
- }
- return;
- }
-#endif /* !__WIN32__ && !MAC_OSX_TK */
-
- for (y = 0; y < height; y++) {
- line = (y + yOffset) * iPtr->masterPtr->width;
- for (x = 0; x < width; x++) {
- masterPtr = alphaAr + ((line + x + xOffset) * 4);
- alpha = masterPtr[3];
-
- /*
- * Ignore pixels that are fully transparent
- */
-
- if (alpha) {
- /*
- * We could perhaps be more efficient than XGetPixel for 24
- * and 32 bit displays, but this seems "fast enough".
- */
-
- r = masterPtr[0];
- g = masterPtr[1];
- b = masterPtr[2];
- if (alpha != 255) {
- /*
- * Only blend pixels that have some transparency
- */
-
- unsigned char ra, ga, ba;
-
- pixel = XGetPixel(bgImg, x, y);
- ra = GetRValue(pixel);
- ga = GetGValue(pixel);
- ba = GetBValue(pixel);
- unalpha = 255 - alpha; /* Calculate once. */
- r = ALPHA_BLEND(ra, r, alpha, unalpha);
- g = ALPHA_BLEND(ga, g, alpha, unalpha);
- b = ALPHA_BLEND(ba, b, alpha, unalpha);
- }
- XPutPixel(bgImg, x, y, RGB(r, g, b));
- }
- }
- }
-#undef ALPHA_BLEND
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * ImgPhotoDisplay --
- *
- * This function is invoked to draw a photo image.
- *
- * Results:
- * None.
- *
- * Side effects:
- * A portion of the image gets rendered in a pixmap or window.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-ImgPhotoDisplay(
- ClientData clientData, /* Pointer to PhotoInstance structure for
- * instance to be displayed. */
- Display *display, /* Display on which to draw image. */
- Drawable drawable, /* Pixmap or window in which to draw image. */
- int imageX, int imageY, /* Upper-left corner of region within image to
- * draw. */
- int width, int height, /* Dimensions of region within image to
- * draw. */
- int drawableX,int drawableY)/* Coordinates within drawable that correspond
- * to imageX and imageY. */
-{
- PhotoInstance *instancePtr = clientData;
- XVisualInfo visInfo = instancePtr->visualInfo;
-
- /*
- * If there's no pixmap, it means that an error occurred while creating
- * the image instance so it can't be displayed.
- */
-
- if (instancePtr->pixels == None) {
- return;
- }
-
- if ((instancePtr->masterPtr->flags & COMPLEX_ALPHA)
- && visInfo.depth >= 15
- && (visInfo.class == DirectColor || visInfo.class == TrueColor)) {
- Tk_ErrorHandler handler;
- XImage *bgImg = NULL;
-
- /*
- * Create an error handler to suppress the case where the input was
- * not properly constrained, which can cause an X error. [Bug 979239]
- */
-
- handler = Tk_CreateErrorHandler(display, -1, -1, -1, NULL, NULL);
-
- /*
- * Pull the current background from the display to blend with
- */
-
- bgImg = XGetImage(display, drawable, drawableX, drawableY,
- (unsigned int)width, (unsigned int)height, AllPlanes, ZPixmap);
- if (bgImg == NULL) {
- Tk_DeleteErrorHandler(handler);
- return;
- }
-
- ImgPhotoBlendComplexAlpha(bgImg, instancePtr, imageX, imageY, width,
- height);
-
- /*
- * Color info is unimportant as we only do this operation for depth >=
- * 15.
- */
-
- TkPutImage(NULL, 0, display, drawable, instancePtr->gc,
- bgImg, 0, 0, drawableX, drawableY,
- (unsigned int) width, (unsigned int) height);
- XDestroyImage(bgImg);
- Tk_DeleteErrorHandler(handler);
- } else {
- /*
- * masterPtr->region describes which parts of the image contain valid
- * data. We set this region as the clip mask for the gc, setting its
- * origin appropriately, and use it when drawing the image.
- */
-
- TkSetRegion(display, instancePtr->gc,
- instancePtr->masterPtr->validRegion);
- XSetClipOrigin(display, instancePtr->gc, drawableX - imageX,
- drawableY - imageY);
- XCopyArea(display, instancePtr->pixels, drawable, instancePtr->gc,
- imageX, imageY, (unsigned) width, (unsigned) height,
- drawableX, drawableY);
- XSetClipMask(display, instancePtr->gc, None);
- XSetClipOrigin(display, instancePtr->gc, 0, 0);
- }
- XFlush(display);
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * ImgPhotoFree --
- *
- * This function is called when a widget ceases to use a particular
- * instance of an image. We don't actually get rid of the instance until
- * later because we may be about to get this instance again.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Internal data structures get cleaned up, later.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-ImgPhotoFree(
- ClientData clientData, /* Pointer to PhotoInstance structure for
- * instance to be displayed. */
- Display *display) /* Display containing window that used
- * image. */
-{
- PhotoInstance *instancePtr = clientData;
- ColorTable *colorPtr;
-
- instancePtr->refCount -= 1;
- if (instancePtr->refCount > 0) {
- return;
- }
-
- /*
- * There are no more uses of the image within this widget. Decrement the
- * count of live uses of its color table, so that its colors can be
- * reclaimed if necessary, and set up an idle call to free the instance
- * structure.
- */
-
- colorPtr = instancePtr->colorTablePtr;
- if (colorPtr != NULL) {
- colorPtr->liveRefCount -= 1;
- }
-
- Tcl_DoWhenIdle(DisposeInstance, instancePtr);
-}
-
-/*
- *----------------------------------------------------------------------
- *
* ImgPhotoDelete --
*
* This function is called by the image code to delete the master
@@ -2906,8 +2000,8 @@ ImgPhotoDelete(
if (instancePtr->refCount > 0) {
Tcl_Panic("tried to delete photo image when instances still exist");
}
- Tcl_CancelIdleCall(DisposeInstance, instancePtr);
- DisposeInstance(instancePtr);
+ Tcl_CancelIdleCall(TkImgDisposeInstance, instancePtr);
+ TkImgDisposeInstance(instancePtr);
}
masterPtr->tkMaster = NULL;
if (masterPtr->imageCmd != NULL) {
@@ -3138,7 +2232,7 @@ ImgPhotoSetSize(
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
instancePtr = instancePtr->nextPtr) {
- ImgPhotoInstanceSetSize(instancePtr);
+ TkImgPhotoInstanceSetSize(instancePtr);
}
return TCL_OK;
@@ -3147,867 +2241,6 @@ ImgPhotoSetSize(
/*
*----------------------------------------------------------------------
*
- * ImgPhotoInstanceSetSize --
- *
- * This function reallocates the instance pixmap and dithering error
- * array for a photo instance, as necessary, to change the image's size
- * to `width' x `height' pixels.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Storage gets reallocated, here and in the X server.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-ImgPhotoInstanceSetSize(
- PhotoInstance *instancePtr) /* Instance whose size is to be changed. */
-{
- PhotoMaster *masterPtr;
- schar *newError, *errSrcPtr, *errDestPtr;
- int h, offset;
- XRectangle validBox;
- Pixmap newPixmap;
-
- masterPtr = instancePtr->masterPtr;
- TkClipBox(masterPtr->validRegion, &validBox);
-
- if ((instancePtr->width != masterPtr->width)
- || (instancePtr->height != masterPtr->height)
- || (instancePtr->pixels == None)) {
- newPixmap = Tk_GetPixmap(instancePtr->display,
- RootWindow(instancePtr->display,
- instancePtr->visualInfo.screen),
- (masterPtr->width > 0) ? masterPtr->width: 1,
- (masterPtr->height > 0) ? masterPtr->height: 1,
- instancePtr->visualInfo.depth);
- if (!newPixmap) {
- Tcl_Panic("Fail to create pixmap with Tk_GetPixmap in ImgPhotoInstanceSetSize.\n");
- }
-
- /*
- * The following is a gross hack needed to properly support colormaps
- * under Windows. Before the pixels can be copied to the pixmap, the
- * relevent colormap must be associated with the drawable. Normally we
- * can infer this association from the window that was used to create
- * the pixmap. However, in this case we're using the root window, so
- * we have to be more explicit.
- */
-
- TkSetPixmapColormap(newPixmap, instancePtr->colormap);
-
- if (instancePtr->pixels != None) {
- /*
- * Copy any common pixels from the old pixmap and free it.
- */
-
- XCopyArea(instancePtr->display, instancePtr->pixels, newPixmap,
- instancePtr->gc, validBox.x, validBox.y,
- validBox.width, validBox.height, validBox.x, validBox.y);
- Tk_FreePixmap(instancePtr->display, instancePtr->pixels);
- }
- instancePtr->pixels = newPixmap;
- }
-
- if ((instancePtr->width != masterPtr->width)
- || (instancePtr->height != masterPtr->height)
- || (instancePtr->error == NULL)) {
-
- if (masterPtr->height > 0 && masterPtr->width > 0) {
- newError = (schar *) ckalloc((unsigned)
- masterPtr->height * masterPtr->width * 3 * sizeof(schar));
-
- /*
- * Zero the new array so that we don't get bogus error values
- * propagating into areas we dither later.
- */
-
- if ((instancePtr->error != NULL)
- && ((instancePtr->width == masterPtr->width)
- || (validBox.width == masterPtr->width))) {
- if (validBox.y > 0) {
- memset(newError, 0, (size_t)
- validBox.y * masterPtr->width * 3 * sizeof(schar));
- }
- h = validBox.y + validBox.height;
- if (h < masterPtr->height) {
- memset(newError + h*masterPtr->width*3, 0,
- (size_t) (masterPtr->height - h)
- * masterPtr->width * 3 * sizeof(schar));
- }
- } else {
- memset(newError, 0, (size_t)
- masterPtr->height * masterPtr->width *3*sizeof(schar));
- }
- } else {
- newError = NULL;
- }
-
- if (instancePtr->error != NULL) {
- /*
- * Copy the common area over to the new array and free the old
- * array.
- */
-
- if (masterPtr->width == instancePtr->width) {
- offset = validBox.y * masterPtr->width * 3;
- memcpy(newError + offset, instancePtr->error + offset,
- (size_t) (validBox.height
- * masterPtr->width * 3 * sizeof(schar)));
-
- } else if (validBox.width > 0 && validBox.height > 0) {
- errDestPtr = newError +
- (validBox.y * masterPtr->width + validBox.x) * 3;
- errSrcPtr = instancePtr->error +
- (validBox.y * instancePtr->width + validBox.x) * 3;
-
- for (h = validBox.height; h > 0; --h) {
- memcpy(errDestPtr, errSrcPtr,
- validBox.width * 3 * sizeof(schar));
- errDestPtr += masterPtr->width * 3;
- errSrcPtr += instancePtr->width * 3;
- }
- }
- ckfree((char *) instancePtr->error);
- }
-
- instancePtr->error = newError;
- }
-
- instancePtr->width = masterPtr->width;
- instancePtr->height = masterPtr->height;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * IsValidPalette --
- *
- * This function is called to check whether a value given for the
- * -palette option is valid for a particular instance of a photo image.
- *
- * Results:
- * A boolean value: 1 if the palette is acceptable, 0 otherwise.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
-static int
-IsValidPalette(
- PhotoInstance *instancePtr, /* Instance to which the palette specification
- * is to be applied. */
- const char *palette) /* Palette specification string. */
-{
- int nRed, nGreen, nBlue, mono, numColors;
- char *endp;
-
- /*
- * First parse the specification: it must be of the form %d or %d/%d/%d.
- */
-
- nRed = strtol(palette, &endp, 10);
- if ((endp == palette) || ((*endp != 0) && (*endp != '/'))
- || (nRed < 2) || (nRed > 256)) {
- return 0;
- }
-
- if (*endp == 0) {
- mono = 1;
- nGreen = nBlue = nRed;
- } else {
- palette = endp + 1;
- nGreen = strtol(palette, &endp, 10);
- if ((endp == palette) || (*endp != '/') || (nGreen < 2)
- || (nGreen > 256)) {
- return 0;
- }
- palette = endp + 1;
- nBlue = strtol(palette, &endp, 10);
- if ((endp == palette) || (*endp != 0) || (nBlue < 2)
- || (nBlue > 256)) {
- return 0;
- }
- mono = 0;
- }
-
- switch (instancePtr->visualInfo.class) {
- case DirectColor:
- case TrueColor:
- if ((nRed > (1 << CountBits(instancePtr->visualInfo.red_mask)))
- || (nGreen>(1<<CountBits(instancePtr->visualInfo.green_mask)))
- || (nBlue>(1<<CountBits(instancePtr->visualInfo.blue_mask)))) {
- return 0;
- }
- break;
- case PseudoColor:
- case StaticColor:
- numColors = nRed;
- if (!mono) {
- numColors *= nGreen * nBlue;
- }
- if (numColors > (1 << instancePtr->visualInfo.depth)) {
- return 0;
- }
- break;
- case GrayScale:
- case StaticGray:
- if (!mono || (nRed > (1 << instancePtr->visualInfo.depth))) {
- return 0;
- }
- break;
- }
-
- return 1;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * CountBits --
- *
- * This function counts how many bits are set to 1 in `mask'.
- *
- * Results:
- * The integer number of bits.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
-static int
-CountBits(
- pixel mask) /* Value to count the 1 bits in. */
-{
- int n;
-
- for (n=0 ; mask!=0 ; mask&=mask-1) {
- n++;
- }
- return n;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * GetColorTable --
- *
- * This function is called to allocate a table of colormap information
- * for an instance of a photo image. Only one such table is allocated for
- * all photo instances using the same display, colormap, palette and
- * gamma values, so that the application need only request a set of
- * colors from the X server once for all such photo widgets. This
- * function maintains a hash table to find previously-allocated
- * ColorTables.
- *
- * Results:
- * None.
- *
- * Side effects:
- * A new ColorTable may be allocated and placed in the hash table, and
- * have colors allocated for it.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-GetColorTable(
- PhotoInstance *instancePtr) /* Instance needing a color table. */
-{
- ColorTable *colorPtr;
- Tcl_HashEntry *entry;
- ColorTableId id;
- int isNew;
-
- /*
- * Look for an existing ColorTable in the hash table.
- */
-
- memset(&id, 0, sizeof(id));
- id.display = instancePtr->display;
- id.colormap = instancePtr->colormap;
- id.palette = instancePtr->palette;
- id.gamma = instancePtr->gamma;
- if (!imgPhotoColorHashInitialized) {
- Tcl_InitHashTable(&imgPhotoColorHash, N_COLOR_HASH);
- imgPhotoColorHashInitialized = 1;
- }
- entry = Tcl_CreateHashEntry(&imgPhotoColorHash, (char *) &id, &isNew);
-
- if (!isNew) {
- /*
- * Re-use the existing entry.
- */
-
- colorPtr = Tcl_GetHashValue(entry);
- } else {
- /*
- * No color table currently available; need to make one.
- */
-
- colorPtr = (ColorTable *) ckalloc(sizeof(ColorTable));
-
- /*
- * The following line of code should not normally be needed due to the
- * assignment in the following line. However, it compensates for bugs
- * in some compilers (HP, for example) where sizeof(ColorTable) is 24
- * but the assignment only copies 20 bytes, leaving 4 bytes
- * uninitialized; these cause problems when using the id for lookups
- * in imgPhotoColorHash, and can result in core dumps.
- */
-
- memset(&colorPtr->id, 0, sizeof(ColorTableId));
- colorPtr->id = id;
- Tk_PreserveColormap(colorPtr->id.display, colorPtr->id.colormap);
- colorPtr->flags = 0;
- colorPtr->refCount = 0;
- colorPtr->liveRefCount = 0;
- colorPtr->numColors = 0;
- colorPtr->visualInfo = instancePtr->visualInfo;
- colorPtr->pixelMap = NULL;
- Tcl_SetHashValue(entry, colorPtr);
- }
-
- colorPtr->refCount++;
- colorPtr->liveRefCount++;
- instancePtr->colorTablePtr = colorPtr;
- if (colorPtr->flags & DISPOSE_PENDING) {
- Tcl_CancelIdleCall(DisposeColorTable, colorPtr);
- colorPtr->flags &= ~DISPOSE_PENDING;
- }
-
- /*
- * Allocate colors for this color table if necessary.
- */
-
- if ((colorPtr->numColors == 0)
- && ((colorPtr->flags & BLACK_AND_WHITE) == 0)) {
- AllocateColors(colorPtr);
- }
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * FreeColorTable --
- *
- * This function is called when an instance ceases using a color table.
- *
- * Results:
- * None.
- *
- * Side effects:
- * If no other instances are using this color table, a when-idle handler
- * is registered to free up the color table and the colors allocated for
- * it.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-FreeColorTable(
- ColorTable *colorPtr, /* Pointer to the color table which is no
- * longer required by an instance. */
- int force) /* Force free to happen immediately. */
-{
- colorPtr->refCount--;
- if (colorPtr->refCount > 0) {
- return;
- }
-
- if (force) {
- if ((colorPtr->flags & DISPOSE_PENDING) != 0) {
- Tcl_CancelIdleCall(DisposeColorTable, colorPtr);
- colorPtr->flags &= ~DISPOSE_PENDING;
- }
- DisposeColorTable(colorPtr);
- } else if ((colorPtr->flags & DISPOSE_PENDING) == 0) {
- Tcl_DoWhenIdle(DisposeColorTable, colorPtr);
- colorPtr->flags |= DISPOSE_PENDING;
- }
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * AllocateColors --
- *
- * This function allocates the colors required by a color table, and sets
- * up the fields in the color table data structure which are used in
- * dithering.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Colors are allocated from the X server. Fields in the color table data
- * structure are updated.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-AllocateColors(
- ColorTable *colorPtr) /* Pointer to the color table requiring colors
- * to be allocated. */
-{
- int i, r, g, b, rMult, mono;
- int numColors, nRed, nGreen, nBlue;
- double fr, fg, fb, igam;
- XColor *colors;
- unsigned long *pixels;
-
- /*
- * 16-bit intensity value for i/n of full intensity.
- */
-#define CFRAC(i, n) ((i) * 65535 / (n))
-
- /* As for CFRAC, but apply exponent of g. */
-#define CGFRAC(i, n, g) ((int)(65535 * pow((double)(i) / (n), (g))))
-
- /*
- * First parse the palette specification to get the required number of
- * shades of each primary.
- */
-
- mono = sscanf(colorPtr->id.palette, "%d/%d/%d", &nRed, &nGreen, &nBlue)
- <= 1;
- igam = 1.0 / colorPtr->id.gamma;
-
- /*
- * Each time around this loop, we reduce the number of colors we're trying
- * to allocate until we succeed in allocating all of the colors we need.
- */
-
- for (;;) {
- /*
- * If we are using 1 bit/pixel, we don't need to allocate any colors
- * (we just use the foreground and background colors in the GC).
- */
-
- if (mono && (nRed <= 2)) {
- colorPtr->flags |= BLACK_AND_WHITE;
- return;
- }
-
- /*
- * Calculate the RGB coordinates of the colors we want to allocate and
- * store them in *colors.
- */
-
- if ((colorPtr->visualInfo.class == DirectColor)
- || (colorPtr->visualInfo.class == TrueColor)) {
-
- /*
- * Direct/True Color: allocate shades of red, green, blue
- * independently.
- */
-
- if (mono) {
- numColors = nGreen = nBlue = nRed;
- } else {
- numColors = MAX(MAX(nRed, nGreen), nBlue);
- }
- colors = (XColor *) ckalloc(numColors * sizeof(XColor));
-
- for (i = 0; i < numColors; ++i) {
- if (igam == 1.0) {
- colors[i].red = CFRAC(i, nRed - 1);
- colors[i].green = CFRAC(i, nGreen - 1);
- colors[i].blue = CFRAC(i, nBlue - 1);
- } else {
- colors[i].red = CGFRAC(i, nRed - 1, igam);
- colors[i].green = CGFRAC(i, nGreen - 1, igam);
- colors[i].blue = CGFRAC(i, nBlue - 1, igam);
- }
- }
- } else {
- /*
- * PseudoColor, StaticColor, GrayScale or StaticGray visual: we
- * have to allocate each color in the color cube separately.
- */
-
- numColors = (mono) ? nRed: (nRed * nGreen * nBlue);
- colors = (XColor *) ckalloc(numColors * sizeof(XColor));
-
- if (!mono) {
- /*
- * Color display using a PseudoColor or StaticColor visual.
- */
-
- i = 0;
- for (r = 0; r < nRed; ++r) {
- for (g = 0; g < nGreen; ++g) {
- for (b = 0; b < nBlue; ++b) {
- if (igam == 1.0) {
- colors[i].red = CFRAC(r, nRed - 1);
- colors[i].green = CFRAC(g, nGreen - 1);
- colors[i].blue = CFRAC(b, nBlue - 1);
- } else {
- colors[i].red = CGFRAC(r, nRed - 1, igam);
- colors[i].green = CGFRAC(g, nGreen - 1, igam);
- colors[i].blue = CGFRAC(b, nBlue - 1, igam);
- }
- i++;
- }
- }
- }
- } else {
- /*
- * Monochrome display - allocate the shades of grey we want.
- */
-
- for (i = 0; i < numColors; ++i) {
- if (igam == 1.0) {
- r = CFRAC(i, numColors - 1);
- } else {
- r = CGFRAC(i, numColors - 1, igam);
- }
- colors[i].red = colors[i].green = colors[i].blue = r;
- }
- }
- }
-
- /*
- * Now try to allocate the colors we've calculated.
- */
-
- pixels = (unsigned long *) ckalloc(numColors * sizeof(unsigned long));
- for (i = 0; i < numColors; ++i) {
- if (!XAllocColor(colorPtr->id.display, colorPtr->id.colormap,
- &colors[i])) {
- /*
- * Can't get all the colors we want in the default colormap;
- * first try freeing colors from other unused color tables.
- */
-
- if (!ReclaimColors(&colorPtr->id, numColors - i)
- || !XAllocColor(colorPtr->id.display,
- colorPtr->id.colormap, &colors[i])) {
- /*
- * Still can't allocate the color.
- */
-
- break;
- }
- }
- pixels[i] = colors[i].pixel;
- }
-
- /*
- * If we didn't get all of the colors, reduce the resolution of the
- * color cube, free the ones we got, and try again.
- */
-
- if (i >= numColors) {
- break;
- }
- XFreeColors(colorPtr->id.display, colorPtr->id.colormap, pixels, i, 0);
- ckfree((char *) colors);
- ckfree((char *) pixels);
-
- if (!mono) {
- if ((nRed == 2) && (nGreen == 2) && (nBlue == 2)) {
- /*
- * Fall back to 1-bit monochrome display.
- */
-
- mono = 1;
- } else {
- /*
- * Reduce the number of shades of each primary to about 3/4 of
- * the previous value. This should reduce the total number of
- * colors required to about half the previous value for
- * PseudoColor displays.
- */
-
- nRed = (nRed * 3 + 2) / 4;
- nGreen = (nGreen * 3 + 2) / 4;
- nBlue = (nBlue * 3 + 2) / 4;
- }
- } else {
- /*
- * Reduce the number of shades of gray to about 1/2.
- */
-
- nRed = nRed / 2;
- }
- }
-
- /*
- * We have allocated all of the necessary colors: fill in various fields
- * of the ColorTable record.
- */
-
- if (!mono) {
- colorPtr->flags |= COLOR_WINDOW;
-
- /*
- * The following is a hairy hack. We only want to index into the
- * pixelMap on colormap displays. However, if the display is on
- * Windows, then we actually want to store the index not the value
- * since we will be passing the color table into the TkPutImage call.
- */
-
-#ifndef __WIN32__
- if ((colorPtr->visualInfo.class != DirectColor)
- && (colorPtr->visualInfo.class != TrueColor)) {
- colorPtr->flags |= MAP_COLORS;
- }
-#endif /* __WIN32__ */
- }
-
- colorPtr->numColors = numColors;
- colorPtr->pixelMap = pixels;
-
- /*
- * Set up quantization tables for dithering.
- */
-
- rMult = nGreen * nBlue;
- for (i = 0; i < 256; ++i) {
- r = (i * (nRed - 1) + 127) / 255;
- if (mono) {
- fr = (double) colors[r].red / 65535.0;
- if (colorPtr->id.gamma != 1.0 ) {
- fr = pow(fr, colorPtr->id.gamma);
- }
- colorPtr->colorQuant[0][i] = (int)(fr * 255.99);
- colorPtr->redValues[i] = colors[r].pixel;
- } else {
- g = (i * (nGreen - 1) + 127) / 255;
- b = (i * (nBlue - 1) + 127) / 255;
- if ((colorPtr->visualInfo.class == DirectColor)
- || (colorPtr->visualInfo.class == TrueColor)) {
- colorPtr->redValues[i] =
- colors[r].pixel & colorPtr->visualInfo.red_mask;
- colorPtr->greenValues[i] =
- colors[g].pixel & colorPtr->visualInfo.green_mask;
- colorPtr->blueValues[i] =
- colors[b].pixel & colorPtr->visualInfo.blue_mask;
- } else {
- r *= rMult;
- g *= nBlue;
- colorPtr->redValues[i] = r;
- colorPtr->greenValues[i] = g;
- colorPtr->blueValues[i] = b;
- }
- fr = (double) colors[r].red / 65535.0;
- fg = (double) colors[g].green / 65535.0;
- fb = (double) colors[b].blue / 65535.0;
- if (colorPtr->id.gamma != 1.0) {
- fr = pow(fr, colorPtr->id.gamma);
- fg = pow(fg, colorPtr->id.gamma);
- fb = pow(fb, colorPtr->id.gamma);
- }
- colorPtr->colorQuant[0][i] = (int)(fr * 255.99);
- colorPtr->colorQuant[1][i] = (int)(fg * 255.99);
- colorPtr->colorQuant[2][i] = (int)(fb * 255.99);
- }
- }
-
- ckfree((char *) colors);
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * DisposeColorTable --
- *
- * Release a color table and its associated resources.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The colors in the argument color table are freed, as is the color
- * table structure itself. The color table is removed from the hash table
- * which is used to locate color tables.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-DisposeColorTable(
- ClientData clientData) /* Pointer to the ColorTable whose
- * colors are to be released. */
-{
- ColorTable *colorPtr = clientData;
- Tcl_HashEntry *entry;
-
- if (colorPtr->pixelMap != NULL) {
- if (colorPtr->numColors > 0) {
- XFreeColors(colorPtr->id.display, colorPtr->id.colormap,
- colorPtr->pixelMap, colorPtr->numColors, 0);
- Tk_FreeColormap(colorPtr->id.display, colorPtr->id.colormap);
- }
- ckfree((char *) colorPtr->pixelMap);
- }
-
- entry = Tcl_FindHashEntry(&imgPhotoColorHash, (char *) &colorPtr->id);
- if (entry == NULL) {
- Tcl_Panic("DisposeColorTable couldn't find hash entry");
- }
- Tcl_DeleteHashEntry(entry);
-
- ckfree((char *) colorPtr);
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * ReclaimColors --
- *
- * This function is called to try to free up colors in the colormap used
- * by a color table. It looks for other color tables with the same
- * colormap and with a zero live reference count, and frees their colors.
- * It only does so if there is the possibility of freeing up at least
- * `numColors' colors.
- *
- * Results:
- * The return value is TRUE if any colors were freed, FALSE otherwise.
- *
- * Side effects:
- * ColorTables which are not currently in use may lose their color
- * allocations.
- *
- *----------------------------------------------------------------------
- */
-
-static int
-ReclaimColors(
- ColorTableId *id, /* Pointer to information identifying
- * the color table which needs more colors. */
- int numColors) /* Number of colors required. */
-{
- Tcl_HashSearch srch;
- Tcl_HashEntry *entry;
- ColorTable *colorPtr;
- int nAvail = 0;
-
- /*
- * First scan through the color hash table to get an upper bound on how
- * many colors we might be able to free.
- */
-
- entry = Tcl_FirstHashEntry(&imgPhotoColorHash, &srch);
- while (entry != NULL) {
- colorPtr = Tcl_GetHashValue(entry);
- if ((colorPtr->id.display == id->display)
- && (colorPtr->id.colormap == id->colormap)
- && (colorPtr->liveRefCount == 0 )&& (colorPtr->numColors != 0)
- && ((colorPtr->id.palette != id->palette)
- || (colorPtr->id.gamma != id->gamma))) {
- /*
- * We could take this guy's colors off him.
- */
-
- nAvail += colorPtr->numColors;
- }
- entry = Tcl_NextHashEntry(&srch);
- }
-
- /*
- * nAvail is an (over)estimate of the number of colors we could free.
- */
-
- if (nAvail < numColors) {
- return 0;
- }
-
- /*
- * Scan through a second time freeing colors.
- */
-
- entry = Tcl_FirstHashEntry(&imgPhotoColorHash, &srch);
- while ((entry != NULL) && (numColors > 0)) {
- colorPtr = Tcl_GetHashValue(entry);
- if ((colorPtr->id.display == id->display)
- && (colorPtr->id.colormap == id->colormap)
- && (colorPtr->liveRefCount == 0) && (colorPtr->numColors != 0)
- && ((colorPtr->id.palette != id->palette)
- || (colorPtr->id.gamma != id->gamma))) {
- /*
- * Free the colors that this ColorTable has.
- */
-
- XFreeColors(colorPtr->id.display, colorPtr->id.colormap,
- colorPtr->pixelMap, colorPtr->numColors, 0);
- numColors -= colorPtr->numColors;
- colorPtr->numColors = 0;
- ckfree((char *) colorPtr->pixelMap);
- colorPtr->pixelMap = NULL;
- }
-
- entry = Tcl_NextHashEntry(&srch);
- }
- return 1; /* We freed some colors. */
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * DisposeInstance --
- *
- * This function is called to finally free up an instance of a photo
- * image which is no longer required.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The instance data structure and the resources it references are freed.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-DisposeInstance(
- ClientData clientData) /* Pointer to the instance whose resources are
- * to be released. */
-{
- PhotoInstance *instancePtr = clientData;
- PhotoInstance *prevPtr;
-
- if (instancePtr->pixels != None) {
- Tk_FreePixmap(instancePtr->display, instancePtr->pixels);
- }
- if (instancePtr->gc != None) {
- Tk_FreeGC(instancePtr->display, instancePtr->gc);
- }
- if (instancePtr->imagePtr != NULL) {
- XDestroyImage(instancePtr->imagePtr);
- }
- if (instancePtr->error != NULL) {
- ckfree((char *) instancePtr->error);
- }
- if (instancePtr->colorTablePtr != NULL) {
- FreeColorTable(instancePtr->colorTablePtr, 1);
- }
-
- if (instancePtr->masterPtr->instancePtr == instancePtr) {
- instancePtr->masterPtr->instancePtr = instancePtr->nextPtr;
- } else {
- for (prevPtr = instancePtr->masterPtr->instancePtr;
- prevPtr->nextPtr != instancePtr; prevPtr = prevPtr->nextPtr) {
- /* Empty loop body. */
- }
- prevPtr->nextPtr = instancePtr->nextPtr;
- }
- Tk_FreeColormap(instancePtr->display, instancePtr->colormap);
- ckfree((char *) instancePtr);
-}
-
-/*
- *----------------------------------------------------------------------
- *
* MatchFileFormat --
*
* This function is called to find a photo image file format handler
@@ -4043,7 +2276,7 @@ MatchFileFormat(
{
int matched = 0, useoldformat = 0;
Tk_PhotoImageFormat *formatPtr;
- ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
+ ThreadSpecificData *tsdPtr =
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
char *formatString = NULL;
@@ -4073,7 +2306,7 @@ MatchFileFormat(
if (formatPtr->fileMatchProc != NULL) {
(void) Tcl_Seek(chan, Tcl_LongAsWide(0L), SEEK_SET);
- if ((*formatPtr->fileMatchProc)(chan, fileName, formatObj,
+ if (formatPtr->fileMatchProc(chan, fileName, formatObj,
widthPtr, heightPtr, interp)) {
if (*widthPtr < 1) {
*widthPtr = 1;
@@ -4103,7 +2336,7 @@ MatchFileFormat(
}
if (formatPtr->fileMatchProc != NULL) {
(void) Tcl_Seek(chan, Tcl_LongAsWide(0L), SEEK_SET);
- if ((*formatPtr->fileMatchProc)(chan, fileName, (Tcl_Obj *)
+ if (formatPtr->fileMatchProc(chan, fileName, (Tcl_Obj *)
formatString, widthPtr, heightPtr, interp)) {
if (*widthPtr < 1) {
*widthPtr = 1;
@@ -4172,7 +2405,7 @@ MatchStringFormat(
{
int matched = 0, useoldformat = 0;
Tk_PhotoImageFormat *formatPtr;
- ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
+ ThreadSpecificData *tsdPtr =
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
char *formatString = NULL;
@@ -4201,8 +2434,8 @@ MatchStringFormat(
}
if ((formatPtr->stringMatchProc != NULL)
&& (formatPtr->stringReadProc != NULL)
- && (*formatPtr->stringMatchProc)(data, formatObj,
- widthPtr, heightPtr, interp)) {
+ && formatPtr->stringMatchProc(data, formatObj,
+ widthPtr, heightPtr, interp)) {
break;
}
}
@@ -4225,7 +2458,7 @@ MatchStringFormat(
}
if ((formatPtr->stringMatchProc != NULL)
&& (formatPtr->stringReadProc != NULL)
- && (*formatPtr->stringMatchProc)(
+ && formatPtr->stringMatchProc(
(Tcl_Obj *) Tcl_GetString(data),
(Tcl_Obj *) formatString,
widthPtr, heightPtr, interp)) {
@@ -4990,7 +3223,7 @@ Tk_DitherPhoto(
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
instancePtr = instancePtr->nextPtr) {
- DitherInstance(instancePtr, x, y, width, height);
+ TkImgDitherInstance(instancePtr, x, y, width, height);
}
/*
@@ -5036,345 +3269,6 @@ Tk_DitherPhoto(
/*
*----------------------------------------------------------------------
*
- * DitherInstance --
- *
- * This function is called to update an area of an instance's pixmap by
- * dithering the corresponding area of the master.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The instance's pixmap gets updated.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-DitherInstance(
- PhotoInstance *instancePtr, /* The instance to be updated. */
- int xStart, int yStart, /* Coordinates of the top-left pixel in the
- * block to be dithered. */
- int width, int height) /* Dimensions of the block to be dithered. */
-{
- PhotoMaster *masterPtr = instancePtr->masterPtr;
- ColorTable *colorPtr = instancePtr->colorTablePtr;
- XImage *imagePtr;
- int nLines, bigEndian, i, c, x, y, xEnd, doDithering = 1;
- int bitsPerPixel, bytesPerLine, lineLength;
- unsigned char *srcLinePtr;
- schar *errLinePtr;
- pixel firstBit, word, mask;
-
- /*
- * Turn dithering off in certain cases where it is not needed (TrueColor,
- * DirectColor with many colors).
- */
-
- if ((colorPtr->visualInfo.class == DirectColor)
- || (colorPtr->visualInfo.class == TrueColor)) {
- int nRed, nGreen, nBlue, result;
-
- result = sscanf(colorPtr->id.palette, "%d/%d/%d", &nRed,
- &nGreen, &nBlue);
- if ((nRed >= 256)
- && ((result == 1) || ((nGreen >= 256) && (nBlue >= 256)))) {
- doDithering = 0;
- }
- }
-
- /*
- * First work out how many lines to do at a time, then how many bytes
- * we'll need for pixel storage, and allocate it.
- */
-
- nLines = (MAX_PIXELS + width - 1) / width;
- if (nLines < 1) {
- nLines = 1;
- }
- if (nLines > height ) {
- nLines = height;
- }
-
- imagePtr = instancePtr->imagePtr;
- if (imagePtr == NULL) {
- return; /* We must be really tight on memory. */
- }
- bitsPerPixel = imagePtr->bits_per_pixel;
- bytesPerLine = ((bitsPerPixel * width + 31) >> 3) & ~3;
- imagePtr->width = width;
- imagePtr->height = nLines;
- imagePtr->bytes_per_line = bytesPerLine;
- imagePtr->data = (char *)
- ckalloc((unsigned) (imagePtr->bytes_per_line * nLines));
- bigEndian = imagePtr->bitmap_bit_order == MSBFirst;
- firstBit = bigEndian? (1 << (imagePtr->bitmap_unit - 1)): 1;
-
- lineLength = masterPtr->width * 3;
- srcLinePtr = masterPtr->pix32 + (yStart * masterPtr->width + xStart) * 4;
- errLinePtr = instancePtr->error + yStart * lineLength + xStart * 3;
- xEnd = xStart + width;
-
- /*
- * Loop over the image, doing at most nLines lines before updating the
- * screen image.
- */
-
- for (; height > 0; height -= nLines) {
- unsigned char *dstLinePtr = (unsigned char *) imagePtr->data;
- int yEnd;
-
- if (nLines > height) {
- nLines = height;
- }
- yEnd = yStart + nLines;
- for (y = yStart; y < yEnd; ++y) {
- unsigned char *srcPtr = srcLinePtr;
- schar *errPtr = errLinePtr;
- unsigned char *destBytePtr = dstLinePtr;
- pixel *destLongPtr = (pixel *) dstLinePtr;
-
- if (colorPtr->flags & COLOR_WINDOW) {
- /*
- * Color window. We dither the three components independently,
- * using Floyd-Steinberg dithering, which propagates errors
- * from the quantization of pixels to the pixels below and to
- * the right.
- */
-
- for (x = xStart; x < xEnd; ++x) {
- int col[3];
-
- if (doDithering) {
- for (i = 0; i < 3; ++i) {
- /*
- * Compute the error propagated into this pixel
- * for this component. If e[x,y] is the array of
- * quantization error values, we compute
- * 7/16 * e[x-1,y] + 1/16 * e[x-1,y-1]
- * + 5/16 * e[x,y-1] + 3/16 * e[x+1,y-1]
- * and round it to an integer.
- *
- * The expression ((c + 2056) >> 4) - 128 computes
- * round(c / 16), and works correctly on machines
- * without a sign-extending right shift.
- */
-
- c = (x > 0) ? errPtr[-3] * 7: 0;
- if (y > 0) {
- if (x > 0) {
- c += errPtr[-lineLength-3];
- }
- c += errPtr[-lineLength] * 5;
- if ((x + 1) < masterPtr->width) {
- c += errPtr[-lineLength+3] * 3;
- }
- }
-
- /*
- * Add the propagated error to the value of this
- * component, quantize it, and store the
- * quantization error.
- */
-
- c = ((c + 2056) >> 4) - 128 + *srcPtr++;
- if (c < 0) {
- c = 0;
- } else if (c > 255) {
- c = 255;
- }
- col[i] = colorPtr->colorQuant[i][c];
- *errPtr++ = c - col[i];
- }
- } else {
- /*
- * Output is virtually continuous in this case, so
- * don't bother dithering.
- */
-
- col[0] = *srcPtr++;
- col[1] = *srcPtr++;
- col[2] = *srcPtr++;
- }
- srcPtr++;
-
- /*
- * Translate the quantized component values into an X
- * pixel value, and store it in the image.
- */
-
- i = colorPtr->redValues[col[0]]
- + colorPtr->greenValues[col[1]]
- + colorPtr->blueValues[col[2]];
- if (colorPtr->flags & MAP_COLORS) {
- i = colorPtr->pixelMap[i];
- }
- switch (bitsPerPixel) {
- case NBBY:
- *destBytePtr++ = i;
- break;
-#ifndef __WIN32__
- /*
- * This case is not valid for Windows because the
- * image format is different from the pixel format in
- * Win32. Eventually we need to fix the image code in
- * Tk to use the Windows native image ordering. This
- * would speed up the image code for all of the common
- * sizes.
- */
-
- case NBBY * sizeof(pixel):
- *destLongPtr++ = i;
- break;
-#endif
- default:
- XPutPixel(imagePtr, x - xStart, y - yStart,
- (unsigned) i);
- }
- }
-
- } else if (bitsPerPixel > 1) {
- /*
- * Multibit monochrome window. The operation here is similar
- * to the color window case above, except that there is only
- * one component. If the master image is in color, use the
- * luminance computed as
- * 0.344 * red + 0.5 * green + 0.156 * blue.
- */
-
- for (x = xStart; x < xEnd; ++x) {
- c = (x > 0) ? errPtr[-1] * 7: 0;
- if (y > 0) {
- if (x > 0) {
- c += errPtr[-lineLength-1];
- }
- c += errPtr[-lineLength] * 5;
- if (x + 1 < masterPtr->width) {
- c += errPtr[-lineLength+1] * 3;
- }
- }
- c = ((c + 2056) >> 4) - 128;
-
- if ((masterPtr->flags & COLOR_IMAGE) == 0) {
- c += srcPtr[0];
- } else {
- c += (unsigned) (srcPtr[0] * 11 + srcPtr[1] * 16
- + srcPtr[2] * 5 + 16) >> 5;
- }
- srcPtr += 4;
-
- if (c < 0) {
- c = 0;
- } else if (c > 255) {
- c = 255;
- }
- i = colorPtr->colorQuant[0][c];
- *errPtr++ = c - i;
- i = colorPtr->redValues[i];
- switch (bitsPerPixel) {
- case NBBY:
- *destBytePtr++ = i;
- break;
-#ifndef __WIN32__
- /*
- * This case is not valid for Windows because the
- * image format is different from the pixel format in
- * Win32. Eventually we need to fix the image code in
- * Tk to use the Windows native image ordering. This
- * would speed up the image code for all of the common
- * sizes.
- */
-
- case NBBY * sizeof(pixel):
- *destLongPtr++ = i;
- break;
-#endif
- default:
- XPutPixel(imagePtr, x - xStart, y - yStart,
- (unsigned) i);
- }
- }
- } else {
- /*
- * 1-bit monochrome window. This is similar to the multibit
- * monochrome case above, except that the quantization is
- * simpler (we only have black = 0 and white = 255), and we
- * produce an XY-Bitmap.
- */
-
- word = 0;
- mask = firstBit;
- for (x = xStart; x < xEnd; ++x) {
- /*
- * If we have accumulated a whole word, store it in the
- * image and start a new word.
- */
-
- if (mask == 0) {
- *destLongPtr++ = word;
- mask = firstBit;
- word = 0;
- }
-
- c = (x > 0) ? errPtr[-1] * 7: 0;
- if (y > 0) {
- if (x > 0) {
- c += errPtr[-lineLength-1];
- }
- c += errPtr[-lineLength] * 5;
- if (x + 1 < masterPtr->width) {
- c += errPtr[-lineLength+1] * 3;
- }
- }
- c = ((c + 2056) >> 4) - 128;
-
- if ((masterPtr->flags & COLOR_IMAGE) == 0) {
- c += srcPtr[0];
- } else {
- c += (unsigned)(srcPtr[0] * 11 + srcPtr[1] * 16
- + srcPtr[2] * 5 + 16) >> 5;
- }
- srcPtr += 4;
-
- if (c < 0) {
- c = 0;
- } else if (c > 255) {
- c = 255;
- }
- if (c >= 128) {
- word |= mask;
- *errPtr++ = c - 255;
- } else {
- *errPtr++ = c;
- }
- mask = bigEndian? (mask >> 1): (mask << 1);
- }
- *destLongPtr = word;
- }
- srcLinePtr += masterPtr->width * 4;
- errLinePtr += lineLength;
- dstLinePtr += bytesPerLine;
- }
-
- /*
- * Update the pixmap for this instance with the block of pixels that
- * we have just computed.
- */
-
- TkPutImage(colorPtr->pixelMap, colorPtr->numColors,
- instancePtr->display, instancePtr->pixels,
- instancePtr->gc, imagePtr, 0, 0, xStart, yStart,
- (unsigned) width, (unsigned) nLines);
- yStart = yEnd;
- }
-
- ckfree(imagePtr->data);
- imagePtr->data = NULL;
-}
-
-/*
- *----------------------------------------------------------------------
- *
* Tk_PhotoBlank --
*
* This function is called to clear an entire photo image.
@@ -5417,11 +3311,7 @@ Tk_PhotoBlank(
(size_t) (masterPtr->width * masterPtr->height * 4));
for (instancePtr = masterPtr->instancePtr; instancePtr != NULL;
instancePtr = instancePtr->nextPtr) {
- if (instancePtr->error) {
- memset(instancePtr->error, 0,
- (size_t) (masterPtr->width * masterPtr->height
- * 3 * sizeof(schar)));
- }
+ TkImgResetDither(instancePtr);
}
/*
@@ -5664,8 +3554,11 @@ ImgGetPhoto(
if ((greenOffset||blueOffset) && !(optPtr->options & OPT_GRAYSCALE)) {
newPixelSize += 2;
}
- data = ckalloc((unsigned int) (newPixelSize *
+ data = attemptckalloc((unsigned int) (newPixelSize *
blockPtr->width * blockPtr->height));
+ if (data == NULL) {
+ return NULL;
+ }
srcPtr = blockPtr->pixelPtr + blockPtr->offset[0];
destPtr = (unsigned char *) data;
if (!greenOffset && !blueOffset) {
@@ -5795,9 +3688,6 @@ ImgStringWrite(
Tcl_Obj *formatString,
Tk_PhotoImageBlock *blockPtr)
{
- int row, col;
- char *line, *linePtr;
- unsigned char *pixelPtr;
int greenOffset, blueOffset;
Tcl_DString data;
@@ -5806,11 +3696,15 @@ ImgStringWrite(
Tcl_DStringInit(&data);
if ((blockPtr->width > 0) && (blockPtr->height > 0)) {
- line = (char *) ckalloc((unsigned int) ((8 * blockPtr->width) + 2));
+ char *line = TclStackAlloc(interp,
+ (unsigned) ((8 * blockPtr->width) + 2));
+ int row, col;
+
for (row=0; row<blockPtr->height; row++) {
- pixelPtr = blockPtr->pixelPtr + blockPtr->offset[0] +
- row * blockPtr->pitch;
- linePtr = line;
+ unsigned char *pixelPtr = blockPtr->pixelPtr + blockPtr->offset[0]
+ + row * blockPtr->pitch;
+ char *linePtr = line;
+
for (col=0; col<blockPtr->width; col++) {
sprintf(linePtr, " #%02x%02x%02x", *pixelPtr,
pixelPtr[greenOffset], pixelPtr[blueOffset]);
@@ -5819,7 +3713,7 @@ ImgStringWrite(
}
Tcl_DStringAppendElement(&data, line+1);
}
- ckfree (line);
+ TclStackFree(interp, line);
}
Tcl_DStringResult(interp, &data);
return TCL_OK;
diff --git a/generic/tkImgPhoto.h b/generic/tkImgPhoto.h
new file mode 100644
index 0000000..fc1a444
--- /dev/null
+++ b/generic/tkImgPhoto.h
@@ -0,0 +1,262 @@
+/*
+ * tkImgPhoto.h --
+ *
+ * Declarations for images of type "photo" for Tk.
+ *
+ * Copyright (c) 1994 The Australian National University.
+ * Copyright (c) 1994-1997 Sun Microsystems, Inc.
+ * Copyright (c) 2002-2008 Donal K. Fellows
+ * Copyright (c) 2003 ActiveState Corporation.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * Author: Paul Mackerras (paulus@cs.anu.edu.au),
+ * Department of Computer Science,
+ * Australian National University.
+ *
+ * RCS: @(#) $Id: tkImgPhoto.h,v 1.1 2008/08/25 11:44:04 dkf Exp $
+ */
+
+#include "tkInt.h"
+#ifdef __WIN32__
+#include "tkWinInt.h"
+#endif
+
+/*
+ * Forward declarations of the structures we define.
+ */
+
+typedef struct ColorTableId ColorTableId;
+typedef struct ColorTable ColorTable;
+typedef struct PhotoInstance PhotoInstance;
+typedef struct PhotoMaster PhotoMaster;
+
+/*
+ * A signed 8-bit integral type. If chars are unsigned and the compiler isn't
+ * an ANSI one, then we have to use short instead (which wastes space) to get
+ * signed behavior.
+ */
+
+#if defined(__STDC__) || defined(_AIX)
+ typedef signed char schar;
+#else
+# ifndef __CHAR_UNSIGNED__
+ typedef char schar;
+# else
+ typedef short schar;
+# endif
+#endif
+
+/*
+ * An unsigned 32-bit integral type, used for pixel values. We use int rather
+ * than long here to accommodate those systems where longs are 64 bits.
+ */
+
+typedef unsigned int pixel;
+
+/*
+ * The maximum number of pixels to transmit to the server in a single
+ * XPutImage call.
+ */
+
+#define MAX_PIXELS 65536
+
+/*
+ * The set of colors required to display a photo image in a window depends on:
+ * - the visual used by the window
+ * - the palette, which specifies how many levels of each primary color to
+ * use, and
+ * - the gamma value for the image.
+ *
+ * Pixel values allocated for specific colors are valid only for the colormap
+ * in which they were allocated. Sets of pixel values allocated for displaying
+ * photos are re-used in other windows if possible, that is, if the display,
+ * colormap, palette and gamma values match. A hash table is used to locate
+ * these sets of pixel values, using the following data structure as key:
+ */
+
+struct ColorTableId {
+ Display *display; /* Qualifies the colormap resource ID. */
+ Colormap colormap; /* Colormap that the windows are using. */
+ double gamma; /* Gamma exponent value for images. */
+ Tk_Uid palette; /* Specifies how many shades of each primary
+ * we want to allocate. */
+};
+
+/*
+ * For a particular (display, colormap, palette, gamma) combination, a data
+ * structure of the following type is used to store the allocated pixel values
+ * and other information:
+ */
+
+struct ColorTable {
+ ColorTableId id; /* Information used in selecting this color
+ * table. */
+ int flags; /* See below. */
+ int refCount; /* Number of instances using this map. */
+ int liveRefCount; /* Number of instances which are actually in
+ * use, using this map. */
+ int numColors; /* Number of colors allocated for this map. */
+
+ XVisualInfo visualInfo; /* Information about the visual for windows
+ * using this color table. */
+
+ pixel redValues[256]; /* Maps 8-bit values of red intensity to a
+ * pixel value or index in pixelMap. */
+ pixel greenValues[256]; /* Ditto for green intensity. */
+ pixel blueValues[256]; /* Ditto for blue intensity. */
+ unsigned long *pixelMap; /* Actual pixel values allocated. */
+
+ unsigned char colorQuant[3][256];
+ /* Maps 8-bit intensities to quantized
+ * intensities. The first index is 0 for red,
+ * 1 for green, 2 for blue. */
+};
+
+/*
+ * Bit definitions for the flags field of a ColorTable.
+ * BLACK_AND_WHITE: 1 means only black and white colors are
+ * available.
+ * COLOR_WINDOW: 1 means a full 3-D color cube has been
+ * allocated.
+ * DISPOSE_PENDING: 1 means a call to DisposeColorTable has been
+ * scheduled as an idle handler, but it hasn't
+ * been invoked yet.
+ * MAP_COLORS: 1 means pixel values should be mapped through
+ * pixelMap.
+ */
+
+#ifdef COLOR_WINDOW
+#undef COLOR_WINDOW
+#endif
+
+#define BLACK_AND_WHITE 1
+#define COLOR_WINDOW 2
+#define DISPOSE_PENDING 4
+#define MAP_COLORS 8
+
+/*
+ * Definition of the data associated with each photo image master.
+ */
+
+struct PhotoMaster {
+ Tk_ImageMaster tkMaster; /* Tk's token for image master. NULL means the
+ * image is being deleted. */
+ Tcl_Interp *interp; /* Interpreter associated with the application
+ * using this image. */
+ Tcl_Command imageCmd; /* Token for image command (used to delete it
+ * when the image goes away). NULL means the
+ * image command has already been deleted. */
+ int flags; /* Sundry flags, defined below. */
+ int width, height; /* Dimensions of image. */
+ int userWidth, userHeight; /* User-declared image dimensions. */
+ Tk_Uid palette; /* User-specified default palette for
+ * instances of this image. */
+ double gamma; /* Display gamma value to correct for. */
+ char *fileString; /* Name of file to read into image. */
+ Tcl_Obj *dataString; /* Object to use as contents of image. */
+ Tcl_Obj *format; /* User-specified format of data in image file
+ * or string value. */
+ unsigned char *pix32; /* Local storage for 32-bit image. */
+ int ditherX, ditherY; /* Location of first incorrectly dithered
+ * pixel in image. */
+ TkRegion validRegion; /* Tk region indicating which parts of the
+ * image have valid image data. */
+ PhotoInstance *instancePtr; /* First in the list of instances associated
+ * with this master. */
+};
+
+/*
+ * Bit definitions for the flags field of a PhotoMaster.
+ * COLOR_IMAGE: 1 means that the image has different color
+ * components.
+ * IMAGE_CHANGED: 1 means that the instances of this image need
+ * to be redithered.
+ * COMPLEX_ALPHA: 1 means that the instances of this image have
+ * alpha values that aren't 0 or 255, and so need
+ * the copy-merge-replace renderer .
+ */
+
+#define COLOR_IMAGE 1
+#define IMAGE_CHANGED 2
+#define COMPLEX_ALPHA 4
+
+/*
+ * Flag to OR with the compositing rule to indicate that the source, despite
+ * having an alpha channel, has simple alpha.
+ */
+
+#define SOURCE_IS_SIMPLE_ALPHA_PHOTO 0x10000000
+
+/*
+ * The following data structure represents all of the instances of a photo
+ * image in windows on a given screen that are using the same colormap.
+ */
+
+struct PhotoInstance {
+ PhotoMaster *masterPtr; /* Pointer to master for image. */
+ Display *display; /* Display for windows using this instance. */
+ Colormap colormap; /* The image may only be used in windows with
+ * this particular colormap. */
+ PhotoInstance *nextPtr; /* Pointer to the next instance in the list of
+ * instances associated with this master. */
+ int refCount; /* Number of instances using this structure. */
+ Tk_Uid palette; /* Palette for these particular instances. */
+ double gamma; /* Gamma value for these instances. */
+ Tk_Uid defaultPalette; /* Default palette to use if a palette is not
+ * specified for the master. */
+ ColorTable *colorTablePtr; /* Pointer to information about colors
+ * allocated for image display in windows like
+ * this one. */
+ Pixmap pixels; /* X pixmap containing dithered image. */
+ int width, height; /* Dimensions of the pixmap. */
+ schar *error; /* Error image, used in dithering. */
+ XImage *imagePtr; /* Image structure for converted pixels. */
+ XVisualInfo visualInfo; /* Information about the visual that these
+ * windows are using. */
+ GC gc; /* Graphics context for writing images to the
+ * pixmap. */
+};
+
+/*
+ * Implementation of the Porter-Duff Source-Over compositing rule.
+ */
+
+#define PD_SRC_OVER(srcColor,srcAlpha,dstColor,dstAlpha) \
+ (srcColor*srcAlpha/255) + dstAlpha*(255-srcAlpha)/255*dstColor/255
+#define PD_SRC_OVER_ALPHA(srcAlpha,dstAlpha) \
+ (srcAlpha + (255-srcAlpha)*dstAlpha/255)
+
+#undef MIN
+#define MIN(a, b) ((a) < (b)? (a): (b))
+#undef MAX
+#define MAX(a, b) ((a) > (b)? (a): (b))
+
+/*
+ * Declarations of functions shared between the different parts of the
+ * photo image implementation.
+ */
+
+MODULE_SCOPE void TkImgPhotoConfigureInstance(
+ PhotoInstance *instancePtr);
+MODULE_SCOPE void TkImgDisposeInstance(ClientData clientData);
+MODULE_SCOPE void TkImgPhotoInstanceSetSize(PhotoInstance *instancePtr);
+MODULE_SCOPE ClientData TkImgPhotoGet(Tk_Window tkwin, ClientData clientData);
+MODULE_SCOPE void TkImgDitherInstance(PhotoInstance *instancePtr, int x,
+ int y, int width, int height);
+MODULE_SCOPE void TkImgPhotoDisplay(ClientData clientData,
+ Display *display, Drawable drawable,
+ int imageX, int imageY, int width, int height,
+ int drawableX, int drawableY);
+MODULE_SCOPE void TkImgPhotoFree(ClientData clientData,
+ Display *display);
+MODULE_SCOPE void TkImgResetDither(PhotoInstance *instancePtr);
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */
diff --git a/unix/Makefile.in b/unix/Makefile.in
index ee34dec..da7d245 100644
--- a/unix/Makefile.in
+++ b/unix/Makefile.in
@@ -5,7 +5,7 @@
# "autoconf" program (constructs like "@foo@" will get replaced in the
# actual Makefile.
#
-# RCS: @(#) $Id: Makefile.in,v 1.144 2008/04/02 03:55:39 dgp Exp $
+# RCS: @(#) $Id: Makefile.in,v 1.145 2008/08/25 11:44:03 dkf Exp $
# Current Tk version; used in various names.
@@ -348,7 +348,8 @@ CANV_OBJS = tkCanvas.o tkCanvArc.o tkCanvBmap.o tkCanvImg.o \
tkCanvLine.o tkCanvPoly.o tkCanvPs.o tkCanvText.o \
tkCanvUtil.o tkCanvWind.o tkRectOval.o tkTrig.o
-IMAGE_OBJS = tkImage.o tkImgBmap.o tkImgGIF.o tkImgPPM.o tkImgPhoto.o
+IMAGE_OBJS = tkImage.o tkImgBmap.o tkImgGIF.o tkImgPPM.o tkImgPhoto.o \
+ tkImgPhInstance.o
TEXT_OBJS = tkText.o tkTextBTree.o tkTextDisp.o tkTextImage.o tkTextIndex.o \
tkTextMark.o tkTextTag.o tkTextWind.o
@@ -439,7 +440,8 @@ GENERIC_SRCS = \
$(GENERIC_DIR)/tkTrig.c $(GENERIC_DIR)/tkImage.c \
$(GENERIC_DIR)/tkImgBmap.c $(GENERIC_DIR)/tkImgGIF.c \
$(GENERIC_DIR)/tkImgPPM.c \
- $(GENERIC_DIR)/tkImgPhoto.c $(GENERIC_DIR)/tkText.c \
+ $(GENERIC_DIR)/tkImgPhoto.c $(GENERIC_DIR)/tkImgPhInstance.c \
+ $(GENERIC_DIR)/tkText.c \
$(GENERIC_DIR)/tkTextBTree.c $(GENERIC_DIR)/tkTextDisp.c \
$(GENERIC_DIR)/tkTextImage.c \
$(GENERIC_DIR)/tkTextIndex.c $(GENERIC_DIR)/tkTextMark.c \
@@ -1082,9 +1084,12 @@ tkImgGIF.o: $(GENERIC_DIR)/tkImgGIF.c
tkImgPPM.o: $(GENERIC_DIR)/tkImgPPM.c
$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tkImgPPM.c
-tkImgPhoto.o: $(GENERIC_DIR)/tkImgPhoto.c
+tkImgPhoto.o: $(GENERIC_DIR)/tkImgPhoto.c $(GENERIC_DIR)/tkImgPhoto.h
$(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tkImgPhoto.c
+tkImgPhInstance.o: $(GENERIC_DIR)/tkImgPhInstance.c $(GENERIC_DIR)/tkImgPhoto.h
+ $(CC) -c $(CC_SWITCHES) $(GENERIC_DIR)/tkImgPhInstance.c
+
tkOldTest.o: $(GENERIC_DIR)/tkOldTest.c
$(CC) -c $(APP_CC_SWITCHES) $(GENERIC_DIR)/tkOldTest.c
diff --git a/win/Makefile.in b/win/Makefile.in
index 96343c3..4d94162 100644
--- a/win/Makefile.in
+++ b/win/Makefile.in
@@ -4,7 +4,7 @@
# "autoconf" program (constructs like "@foo@" will get replaced in the
# actual Makefile.
#
-# RCS: @(#) $Id: Makefile.in,v 1.79 2008/04/02 04:30:42 dgp Exp $
+# RCS: @(#) $Id: Makefile.in,v 1.80 2008/08/25 11:44:04 dkf Exp $
TCLVERSION = @TCL_VERSION@
TCLPATCHL = @TCL_PATCH_LEVEL@
@@ -315,6 +315,7 @@ TK_OBJS = \
tkImgGIF.$(OBJEXT) \
tkImgPPM.$(OBJEXT) \
tkImgPhoto.$(OBJEXT) \
+ tkImgPhInstance.$(OBJEXT) \
tkImgUtil.$(OBJEXT) \
tkListbox.$(OBJEXT) \
tkMacWinMenu.$(OBJEXT) \
diff --git a/win/makefile.bc b/win/makefile.bc
index 3575582..cf490f2 100644
--- a/win/makefile.bc
+++ b/win/makefile.bc
@@ -13,7 +13,7 @@
# Copyright (c) 1995-1997 Sun Microsystems, Inc.
# Copyright (c) 1998-2000 Ajuba Solutions.
#
-# RCS: @(#) $Id: makefile.bc,v 1.15 2008/04/02 04:30:44 dgp Exp $
+# RCS: @(#) $Id: makefile.bc,v 1.16 2008/08/25 11:44:04 dkf Exp $
# Does not depend on the presence of any environment variables in
# order to compile tcl; all needed information is derived from
@@ -196,6 +196,7 @@ TKOBJS = \
$(TMPDIR)\tkImgGIF.obj \
$(TMPDIR)\tkImgPPM.obj \
$(TMPDIR)\tkImgPhoto.obj \
+ $(TMPDIR)\tkImgPhInstance.obj \
$(TMPDIR)\tkImgUtil.obj \
$(TMPDIR)\tkListbox.obj \
$(TMPDIR)\tkMacWinMenu.obj \
diff --git a/win/makefile.vc b/win/makefile.vc
index 9c1509e..32d353f 100644
--- a/win/makefile.vc
+++ b/win/makefile.vc
@@ -13,7 +13,7 @@
# Copyright (c) 2003-2008 Pat Thoyts.
#
#------------------------------------------------------------------------------
-# RCS: @(#) $Id: makefile.vc,v 1.123 2008/06/13 05:46:09 mistachkin Exp $
+# RCS: @(#) $Id: makefile.vc,v 1.124 2008/08/25 11:44:04 dkf Exp $
#------------------------------------------------------------------------------
# Check to see we are configured to build with MSVC (MSDEVDIR or MSVCDIR)
@@ -323,6 +323,7 @@ TKOBJS = \
$(TMP_DIR)\tkImgGIF.obj \
$(TMP_DIR)\tkImgPPM.obj \
$(TMP_DIR)\tkImgPhoto.obj \
+ $(TMP_DIR)\tkImgPhInstance.obj \
$(TMP_DIR)\tkImgUtil.obj \
$(TMP_DIR)\tkListbox.obj \
$(TMP_DIR)\tkMacWinMenu.obj \