Initial revision

1 files changed, 329 insertions, 0 deletions

diff --git a/win/tkWinImage.c b/win/tkWinImage.c
new file mode 100644
index 0000000..388a58a
--- /dev/null
+++ b/win/tkWinImage.c
@@ -0,0 +1,329 @@
+/* 
+ * tkWinImage.c --
+ *
+ *	This file contains routines for manipulation full-color images.
+ *
+ * Copyright (c) 1995 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tkWinImage.c 1.13 97/07/07 11:19:45
+ */
+
+#include "tkWinInt.h"
+
+static int		DestroyImage _ANSI_ARGS_((XImage* data));
+static unsigned long	ImageGetPixel _ANSI_ARGS_((XImage *image, int x, int y));
+static int		PutPixel _ANSI_ARGS_((XImage *image, int x, int y,
+			    unsigned long pixel));
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * DestroyImage --
+ *
+ *	This is a trivial wrapper around ckfree to make it possible to
+ *	pass ckfree as a pointer.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Deallocates the image.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+DestroyImage(imagePtr)
+     XImage *imagePtr;		/* image to free */
+{
+    if (imagePtr) {
+	if (imagePtr->data) {
+	    ckfree((char*)imagePtr->data);
+	}
+	ckfree((char*)imagePtr);
+    }
+    return 0;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ImageGetPixel --
+ *
+ *	Get a single pixel from an image.
+ *
+ * Results:
+ *	Returns the 32 bit pixel value.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+unsigned long
+ImageGetPixel(image, x, y)
+    XImage *image;
+    int x, y;
+{
+    unsigned long pixel = 0;
+    unsigned char *srcPtr = &(image->data[(y * image->bytes_per_line)
+	    + ((x * image->bits_per_pixel) / NBBY)]);
+
+    switch (image->bits_per_pixel) {
+	case 32:
+	case 24:
+	    pixel = RGB(srcPtr[2], srcPtr[1], srcPtr[0]);
+	    break;
+	case 16:
+	    pixel = RGB(((((WORD*)srcPtr)[0]) >> 7) & 0xf8,
+		    ((((WORD*)srcPtr)[0]) >> 2) & 0xf8,
+		    ((((WORD*)srcPtr)[0]) << 3) & 0xf8);
+	    break;
+	case 8:
+	    pixel = srcPtr[0];
+	    break;
+	case 4:
+	    pixel = ((x%2) ? (*srcPtr) : ((*srcPtr) >> 4)) & 0x0f;
+	    break;
+	case 1:
+	    pixel = ((*srcPtr) & (0x80 >> (x%8))) ? 1 : 0;
+	    break;
+    }
+    return pixel;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * PutPixel --
+ *
+ *	Set a single pixel in an image.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+PutPixel(image, x, y, pixel)
+    XImage *image;
+    int x, y;
+    unsigned long pixel;
+{
+    unsigned char *destPtr = &(image->data[(y * image->bytes_per_line)
+	    + ((x * image->bits_per_pixel) / NBBY)]);
+
+    switch  (image->bits_per_pixel) {
+	case 32:
+	    /*
+	     * Pixel is DWORD: 0x00BBGGRR
+	     */
+
+	    destPtr[3] = 0;
+	case 24:
+	    /*
+	     * Pixel is triplet: 0xBBGGRR.
+	     */
+
+	    destPtr[0] = (unsigned char) GetBValue(pixel);
+	    destPtr[1] = (unsigned char) GetGValue(pixel);
+	    destPtr[2] = (unsigned char) GetRValue(pixel);
+	    break;
+	case 16:
+	    /*
+	     * Pixel is WORD: 5-5-5 (R-G-B)
+	     */
+
+	    (*(WORD*)destPtr) = 
+		((GetRValue(pixel) & 0xf8) << 7)
+		| ((GetGValue(pixel) & 0xf8) <<2)
+		| ((GetBValue(pixel) & 0xf8) >> 3);
+	    break;
+	case 8:
+	    /*
+	     * Pixel is 8-bit index into color table.
+	     */
+
+	    (*destPtr) = (unsigned char) pixel;
+	    break;
+	case 4:
+	    /*
+	     * Pixel is 4-bit index in MSBFirst order.
+	     */
+	    if (x%2) {
+		(*destPtr) = (unsigned char) (((*destPtr) & 0xf0)
+		    | (pixel & 0x0f));
+	    } else {
+		(*destPtr) = (unsigned char) (((*destPtr) & 0x0f)
+		    | ((pixel << 4) & 0xf0));
+	    }
+	    break;
+	case 1: {
+	    /*
+	     * Pixel is bit in MSBFirst order.
+	     */
+
+	    int mask = (0x80 >> (x%8));
+	    if (pixel) {
+		(*destPtr) |= mask;
+	    } else {
+		(*destPtr) &= ~mask;
+	    }
+	}
+	break;
+    }
+    return 0;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XCreateImage --
+ *
+ *	Allocates storage for a new XImage.
+ *
+ * Results:
+ *	Returns a newly allocated XImage.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+XImage *
+XCreateImage(display, visual, depth, format, offset, data, width, height,
+	bitmap_pad, bytes_per_line)
+    Display* display;
+    Visual* visual;
+    unsigned int depth;
+    int format;
+    int offset;
+    char* data;
+    unsigned int width;
+    unsigned int height;
+    int bitmap_pad;
+    int bytes_per_line;
+{
+    XImage* imagePtr = (XImage *) ckalloc(sizeof(XImage));
+    imagePtr->width = width;
+    imagePtr->height = height;
+    imagePtr->xoffset = offset;
+    imagePtr->format = format;
+    imagePtr->data = data;
+    imagePtr->byte_order = LSBFirst;
+    imagePtr->bitmap_unit = 8;
+    imagePtr->bitmap_bit_order = MSBFirst;
+    imagePtr->bitmap_pad = bitmap_pad;
+    imagePtr->bits_per_pixel = depth;
+    imagePtr->depth = depth;
+
+    /*
+     * Under Windows, bitmap_pad must be on an LONG data-type boundary.
+     */
+
+#define LONGBITS    (sizeof(LONG) * 8)
+
+    bitmap_pad = (bitmap_pad + LONGBITS - 1) / LONGBITS * LONGBITS;
+
+    /*
+     * Round to the nearest bitmap_pad boundary.
+     */
+
+    if (bytes_per_line) {
+	imagePtr->bytes_per_line = bytes_per_line;
+    } else {
+	imagePtr->bytes_per_line = (((depth * width)
+		+ (bitmap_pad - 1)) >> 3) & ~((bitmap_pad >> 3) - 1);
+    }
+
+    imagePtr->red_mask = 0;
+    imagePtr->green_mask = 0;
+    imagePtr->blue_mask = 0;
+
+    imagePtr->f.put_pixel = PutPixel;
+    imagePtr->f.get_pixel = ImageGetPixel;
+    imagePtr->f.destroy_image = DestroyImage;
+    imagePtr->f.create_image = NULL;
+    imagePtr->f.sub_image = NULL;
+    imagePtr->f.add_pixel = NULL;
+    
+    return imagePtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * XGetImage --
+ *
+ *	This function copies data from a pixmap or window into an
+ *	XImage.
+ *
+ * Results:
+ *	Returns a newly allocated image containing the data from the
+ *	given rectangle of the given drawable.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+XImage *
+XGetImage(display, d, x, y, width, height, plane_mask, format)
+    Display* display;
+    Drawable d;
+    int x;
+    int y;
+    unsigned int width;
+    unsigned int height;
+    unsigned long plane_mask;
+    int	format;
+{
+    TkWinDrawable *twdPtr = (TkWinDrawable *)d;
+    XImage *imagePtr;
+    HDC dc;
+    char infoBuf[sizeof(BITMAPINFO) + sizeof(RGBQUAD)];
+    BITMAPINFO *infoPtr = (BITMAPINFO*)infoBuf;
+
+    if ((twdPtr->type != TWD_BITMAP) || (twdPtr->bitmap.handle == NULL)
+	    || (format != XYPixmap) || (plane_mask != 1)) {
+	panic("XGetImage: not implemented");
+    }
+
+
+    imagePtr = XCreateImage(display, NULL, 1, XYBitmap, 0, NULL,
+	    width, height, 32, 0);
+    imagePtr->data = ckalloc(imagePtr->bytes_per_line * imagePtr->height);
+
+    dc = GetDC(NULL);
+
+    GetDIBits(dc, twdPtr->bitmap.handle, 0, height, NULL,
+	    infoPtr, DIB_RGB_COLORS);
+
+    infoPtr->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+    infoPtr->bmiHeader.biWidth = width;
+    infoPtr->bmiHeader.biHeight = -(LONG)height;
+    infoPtr->bmiHeader.biPlanes = 1;
+    infoPtr->bmiHeader.biBitCount = 1;
+    infoPtr->bmiHeader.biCompression = BI_RGB;
+    infoPtr->bmiHeader.biCompression = 0;
+    infoPtr->bmiHeader.biXPelsPerMeter = 0;
+    infoPtr->bmiHeader.biYPelsPerMeter = 0;
+    infoPtr->bmiHeader.biClrUsed = 0;
+    infoPtr->bmiHeader.biClrImportant = 0;
+
+    GetDIBits(dc, twdPtr->bitmap.handle, 0, height, imagePtr->data,
+	    infoPtr, DIB_RGB_COLORS);
+    ReleaseDC(NULL, dc);
+
+    return imagePtr;
+}