diff options
Diffstat (limited to 'tk8.6/generic/tkImgBmap.c')
| -rw-r--r-- | tk8.6/generic/tkImgBmap.c | 1323 |
1 files changed, 0 insertions, 1323 deletions
diff --git a/tk8.6/generic/tkImgBmap.c b/tk8.6/generic/tkImgBmap.c deleted file mode 100644 index 0906673..0000000 --- a/tk8.6/generic/tkImgBmap.c +++ /dev/null @@ -1,1323 +0,0 @@ -/* - * tkImgBmap.c -- - * - * This procedure implements images of type "bitmap" for Tk. - * - * Copyright (c) 1994 The Regents of the University of California. - * Copyright (c) 1994-1997 Sun Microsystems, Inc. - * Copyright (c) 1999 by Scriptics Corporation. - * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. - */ - -#include "tkInt.h" - -/* - * The following data structure represents the master for a bitmap - * image: - */ - -typedef struct BitmapMaster { - Tk_ImageMaster tkMaster; /* Tk's token for image master. NULL means the - * image is being deleted. */ - Tcl_Interp *interp; /* Interpreter for application that is using - * 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 width, height; /* Dimensions of image. */ - char *data; /* Data comprising bitmap (suitable for input - * to XCreateBitmapFromData). May be NULL if - * no data. Malloc'ed. */ - char *maskData; /* Data for bitmap's mask (suitable for input - * to XCreateBitmapFromData). Malloc'ed. */ - Tk_Uid fgUid; /* Value of -foreground option (malloc'ed). */ - Tk_Uid bgUid; /* Value of -background option (malloc'ed). */ - char *fileString; /* Value of -file option (malloc'ed). */ - char *dataString; /* Value of -data option (malloc'ed). */ - char *maskFileString; /* Value of -maskfile option (malloc'ed). */ - char *maskDataString; /* Value of -maskdata option (malloc'ed). */ - struct BitmapInstance *instancePtr; - /* First in list of all instances associated - * with this master. */ -} BitmapMaster; - -/* - * The following data structure represents all of the instances of an image - * that lie within a particular window: - */ - -typedef struct BitmapInstance { - int refCount; /* Number of instances that share this data - * structure. */ - BitmapMaster *masterPtr; /* Pointer to master for image. */ - Tk_Window tkwin; /* Window in which the instances will be - * displayed. */ - XColor *fg; /* Foreground color for displaying image. */ - XColor *bg; /* Background color for displaying image. */ - Pixmap bitmap; /* The bitmap to display. */ - Pixmap mask; /* Mask: only display bitmap pixels where - * there are 1's here. */ - GC gc; /* Graphics context for displaying bitmap. - * None means there was an error while setting - * up the instance, so it cannot be - * displayed. */ - struct BitmapInstance *nextPtr; - /* Next in list of all instance structures - * associated with masterPtr (NULL means end - * of list). */ -} BitmapInstance; - -/* - * The type record for bitmap images: - */ - -static int GetByte(Tcl_Channel chan); -static int ImgBmapCreate(Tcl_Interp *interp, - const char *name, int argc, Tcl_Obj *const objv[], - const Tk_ImageType *typePtr, Tk_ImageMaster master, - ClientData *clientDataPtr); -static ClientData ImgBmapGet(Tk_Window tkwin, ClientData clientData); -static void ImgBmapDisplay(ClientData clientData, - Display *display, Drawable drawable, - int imageX, int imageY, int width, int height, - int drawableX, int drawableY); -static void ImgBmapFree(ClientData clientData, Display *display); -static void ImgBmapDelete(ClientData clientData); -static int ImgBmapPostscript(ClientData clientData, - Tcl_Interp *interp, Tk_Window tkwin, - Tk_PostscriptInfo psinfo, int x, int y, - int width, int height, int prepass); - -Tk_ImageType tkBitmapImageType = { - "bitmap", /* name */ - ImgBmapCreate, /* createProc */ - ImgBmapGet, /* getProc */ - ImgBmapDisplay, /* displayProc */ - ImgBmapFree, /* freeProc */ - ImgBmapDelete, /* deleteProc */ - ImgBmapPostscript, /* postscriptProc */ - NULL, /* nextPtr */ - NULL -}; - -/* - * Information used for parsing configuration specs: - */ - -static const Tk_ConfigSpec configSpecs[] = { - {TK_CONFIG_UID, "-background", NULL, NULL, - "", Tk_Offset(BitmapMaster, bgUid), 0, NULL}, - {TK_CONFIG_STRING, "-data", NULL, NULL, - NULL, Tk_Offset(BitmapMaster, dataString), TK_CONFIG_NULL_OK, NULL}, - {TK_CONFIG_STRING, "-file", NULL, NULL, - NULL, Tk_Offset(BitmapMaster, fileString), TK_CONFIG_NULL_OK, NULL}, - {TK_CONFIG_UID, "-foreground", NULL, NULL, - "#000000", Tk_Offset(BitmapMaster, fgUid), 0, NULL}, - {TK_CONFIG_STRING, "-maskdata", NULL, NULL, - NULL, Tk_Offset(BitmapMaster, maskDataString), TK_CONFIG_NULL_OK, NULL}, - {TK_CONFIG_STRING, "-maskfile", NULL, NULL, - NULL, Tk_Offset(BitmapMaster, maskFileString), TK_CONFIG_NULL_OK, NULL}, - {TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0, NULL} -}; - -/* - * The following data structure is used to describe the state of parsing a - * bitmap file or string. It is used for communication between TkGetBitmapData - * and NextBitmapWord. - */ - -#define MAX_WORD_LENGTH 100 -typedef struct ParseInfo { - const char *string; /* Next character of string data for bitmap, - * or NULL if bitmap is being read from - * file. */ - Tcl_Channel chan; /* File containing bitmap data, or NULL if no - * file. */ - char word[MAX_WORD_LENGTH+1]; - /* Current word of bitmap data, NULL - * terminated. */ - int wordLength; /* Number of non-NULL bytes in word. */ -} ParseInfo; - -/* - * Prototypes for procedures used only locally in this file: - */ - -static int ImgBmapCmd(ClientData clientData, Tcl_Interp *interp, - int argc, Tcl_Obj *const objv[]); -static void ImgBmapCmdDeletedProc(ClientData clientData); -static void ImgBmapConfigureInstance(BitmapInstance *instancePtr); -static int ImgBmapConfigureMaster(BitmapMaster *masterPtr, - int argc, Tcl_Obj *const objv[], int flags); -static int NextBitmapWord(ParseInfo *parseInfoPtr); - -/* - *---------------------------------------------------------------------- - * - * ImgBmapCreate -- - * - * This procedure is called by the Tk image code to create "test" images. - * - * Results: - * A standard Tcl result. - * - * Side effects: - * The data structure for a new image is allocated. - * - *---------------------------------------------------------------------- - */ - - /* ARGSUSED */ -static int -ImgBmapCreate( - Tcl_Interp *interp, /* Interpreter for application containing - * image. */ - const char *name, /* Name to use for image. */ - int argc, /* Number of arguments. */ - Tcl_Obj *const argv[], /* Argument objects for options (doesn't - * include image name or type). */ - const Tk_ImageType *typePtr,/* Pointer to our type record (not used). */ - Tk_ImageMaster master, /* Token for image, to be used by us in later - * callbacks. */ - ClientData *clientDataPtr) /* Store manager's token for image here; it - * will be returned in later callbacks. */ -{ - BitmapMaster *masterPtr = ckalloc(sizeof(BitmapMaster)); - - masterPtr->tkMaster = master; - masterPtr->interp = interp; - masterPtr->imageCmd = Tcl_CreateObjCommand(interp, name, ImgBmapCmd, - masterPtr, ImgBmapCmdDeletedProc); - masterPtr->width = masterPtr->height = 0; - masterPtr->data = NULL; - masterPtr->maskData = NULL; - masterPtr->fgUid = NULL; - masterPtr->bgUid = NULL; - masterPtr->fileString = NULL; - masterPtr->dataString = NULL; - masterPtr->maskFileString = NULL; - masterPtr->maskDataString = NULL; - masterPtr->instancePtr = NULL; - if (ImgBmapConfigureMaster(masterPtr, argc, argv, 0) != TCL_OK) { - ImgBmapDelete(masterPtr); - return TCL_ERROR; - } - *clientDataPtr = masterPtr; - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * ImgBmapConfigureMaster -- - * - * This procedure is called when a bitmap image is created or - * reconfigured. It process configuration options and resets any - * instances of the image. - * - * Results: - * A standard Tcl return value. If TCL_ERROR is returned then an error - * message is left in the masterPtr->interp's result. - * - * Side effects: - * Existing instances of the image will be redisplayed to match the new - * configuration options. - * - *---------------------------------------------------------------------- - */ - -static int -ImgBmapConfigureMaster( - BitmapMaster *masterPtr, /* Pointer to data structure describing - * overall bitmap image to (reconfigure). */ - int objc, /* Number of entries in objv. */ - Tcl_Obj *const objv[], /* Pairs of configuration options for image. */ - int flags) /* Flags to pass to Tk_ConfigureWidget, such - * as TK_CONFIG_ARGV_ONLY. */ -{ - BitmapInstance *instancePtr; - int maskWidth, maskHeight, dummy1, dummy2; - const char **argv = ckalloc((objc+1) * sizeof(char *)); - - for (dummy1 = 0; dummy1 < objc; dummy1++) { - argv[dummy1] = Tcl_GetString(objv[dummy1]); - } - argv[objc] = NULL; - - if (Tk_ConfigureWidget(masterPtr->interp, Tk_MainWindow(masterPtr->interp), - configSpecs, objc, argv, (char *) masterPtr, flags) != TCL_OK) { - ckfree(argv); - return TCL_ERROR; - } - ckfree(argv); - - /* - * Parse the bitmap and/or mask to create binary data. Make sure that the - * bitmap and mask have the same dimensions. - */ - - if (masterPtr->data != NULL) { - ckfree(masterPtr->data); - masterPtr->data = NULL; - } - if ((masterPtr->fileString != NULL) || (masterPtr->dataString != NULL)) { - masterPtr->data = TkGetBitmapData(masterPtr->interp, - masterPtr->dataString, masterPtr->fileString, - &masterPtr->width, &masterPtr->height, &dummy1, &dummy2); - if (masterPtr->data == NULL) { - return TCL_ERROR; - } - } - if (masterPtr->maskData != NULL) { - ckfree(masterPtr->maskData); - masterPtr->maskData = NULL; - } - if ((masterPtr->maskFileString != NULL) - || (masterPtr->maskDataString != NULL)) { - if (masterPtr->data == NULL) { - Tcl_SetObjResult(masterPtr->interp, Tcl_NewStringObj( - "can't have mask without bitmap", -1)); - Tcl_SetErrorCode(masterPtr->interp, "TK", "IMAGE", "BITMAP", - "NO_BITMAP", NULL); - return TCL_ERROR; - } - masterPtr->maskData = TkGetBitmapData(masterPtr->interp, - masterPtr->maskDataString, masterPtr->maskFileString, - &maskWidth, &maskHeight, &dummy1, &dummy2); - if (masterPtr->maskData == NULL) { - return TCL_ERROR; - } - if ((maskWidth != masterPtr->width) - || (maskHeight != masterPtr->height)) { - ckfree(masterPtr->maskData); - masterPtr->maskData = NULL; - Tcl_SetObjResult(masterPtr->interp, Tcl_NewStringObj( - "bitmap and mask have different sizes", -1)); - Tcl_SetErrorCode(masterPtr->interp, "TK", "IMAGE", "BITMAP", - "MASK_SIZE", NULL); - return TCL_ERROR; - } - } - - /* - * Cycle through all of the instances of this image, regenerating the - * information for each instance. Then force the image to be redisplayed - * everywhere that it is used. - */ - - for (instancePtr = masterPtr->instancePtr; instancePtr != NULL; - instancePtr = instancePtr->nextPtr) { - ImgBmapConfigureInstance(instancePtr); - } - Tk_ImageChanged(masterPtr->tkMaster, 0, 0, masterPtr->width, - masterPtr->height, masterPtr->width, masterPtr->height); - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * ImgBmapConfigureInstance -- - * - * This procedure is called to create displaying information for a bitmap - * 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_BackgroundException if there are problems in - * setting up the instance. - * - *---------------------------------------------------------------------- - */ - -static void -ImgBmapConfigureInstance( - BitmapInstance *instancePtr)/* Instance to reconfigure. */ -{ - BitmapMaster *masterPtr = instancePtr->masterPtr; - XColor *colorPtr; - XGCValues gcValues; - GC gc; - unsigned int mask; - Pixmap oldBitmap, oldMask; - - /* - * For each of the options in masterPtr, translate the string form into an - * internal form appropriate for instancePtr. - */ - - if (*masterPtr->bgUid != 0) { - colorPtr = Tk_GetColor(masterPtr->interp, instancePtr->tkwin, - masterPtr->bgUid); - if (colorPtr == NULL) { - goto error; - } - } else { - colorPtr = NULL; - } - if (instancePtr->bg != NULL) { - Tk_FreeColor(instancePtr->bg); - } - instancePtr->bg = colorPtr; - - colorPtr = Tk_GetColor(masterPtr->interp, instancePtr->tkwin, - masterPtr->fgUid); - if (colorPtr == NULL) { - goto error; - } - if (instancePtr->fg != NULL) { - Tk_FreeColor(instancePtr->fg); - } - instancePtr->fg = colorPtr; - - /* - * Careful: We have to allocate new Pixmaps before deleting the old ones. - * Otherwise, The XID allocator will always return the same XID for the - * new Pixmaps as was used for the old Pixmaps. And that will prevent the - * data and/or mask from changing in the GC below. - */ - - oldBitmap = instancePtr->bitmap; - instancePtr->bitmap = None; - oldMask = instancePtr->mask; - instancePtr->mask = None; - - if (masterPtr->data != NULL) { - instancePtr->bitmap = XCreateBitmapFromData( - Tk_Display(instancePtr->tkwin), - RootWindowOfScreen(Tk_Screen(instancePtr->tkwin)), - masterPtr->data, (unsigned) masterPtr->width, - (unsigned) masterPtr->height); - } - if (masterPtr->maskData != NULL) { - instancePtr->mask = XCreateBitmapFromData( - Tk_Display(instancePtr->tkwin), - RootWindowOfScreen(Tk_Screen(instancePtr->tkwin)), - masterPtr->maskData, (unsigned) masterPtr->width, - (unsigned) masterPtr->height); - } - - if (oldMask != None) { - Tk_FreePixmap(Tk_Display(instancePtr->tkwin), oldMask); - } - if (oldBitmap != None) { - Tk_FreePixmap(Tk_Display(instancePtr->tkwin), oldBitmap); - } - - if (masterPtr->data != NULL) { - gcValues.foreground = instancePtr->fg->pixel; - gcValues.graphics_exposures = False; - mask = GCForeground|GCGraphicsExposures; - if (instancePtr->bg != NULL) { - gcValues.background = instancePtr->bg->pixel; - mask |= GCBackground; - if (instancePtr->mask != None) { - gcValues.clip_mask = instancePtr->mask; - mask |= GCClipMask; - } - } else { - gcValues.clip_mask = instancePtr->bitmap; - mask |= GCClipMask; - } - gc = Tk_GetGC(instancePtr->tkwin, mask, &gcValues); - } else { - gc = None; - } - if (instancePtr->gc != None) { - Tk_FreeGC(Tk_Display(instancePtr->tkwin), instancePtr->gc); - } - instancePtr->gc = gc; - return; - - error: - /* - * An error occurred: clear the graphics context in the instance to make - * it clear that this instance cannot be displayed. Then report the error. - */ - - if (instancePtr->gc != None) { - Tk_FreeGC(Tk_Display(instancePtr->tkwin), instancePtr->gc); - } - instancePtr->gc = None; - Tcl_AppendObjToErrorInfo(masterPtr->interp, Tcl_ObjPrintf( - "\n (while configuring image \"%s\")", Tk_NameOfImage( - masterPtr->tkMaster))); - Tcl_BackgroundException(masterPtr->interp, TCL_ERROR); -} - -/* - *---------------------------------------------------------------------- - * - * TkGetBitmapData -- - * - * Given a file name or ASCII string, this procedure parses the file or - * string contents to produce binary data for a bitmap. - * - * Results: - * If the bitmap description was parsed successfully then the return - * value is a malloc-ed array containing the bitmap data. The dimensions - * of the data are stored in *widthPtr and *heightPtr. *hotXPtr and - * *hotYPtr are set to the bitmap hotspot if one is defined, otherwise - * they are set to -1, -1. If an error occurred, NULL is returned and an - * error message is left in the interp's result. - * - * Side effects: - * A bitmap is created. - * - *---------------------------------------------------------------------- - */ - -char * -TkGetBitmapData( - Tcl_Interp *interp, /* For reporting errors, or NULL. */ - const char *string, /* String describing bitmap. May be NULL. */ - const char *fileName, /* Name of file containing bitmap description. - * Used only if string is NULL. Must not be - * NULL if string is NULL. */ - int *widthPtr, int *heightPtr, - /* Dimensions of bitmap get returned here. */ - int *hotXPtr, int *hotYPtr) /* Position of hot spot or -1,-1. */ -{ - int width, height, numBytes, hotX, hotY; - const char *expandedFileName; - char *p, *end; - ParseInfo pi; - char *data = NULL; - Tcl_DString buffer; - - pi.string = string; - if (string == NULL) { - if ((interp != NULL) && Tcl_IsSafe(interp)) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "can't get bitmap data from a file in a safe interpreter", - -1)); - Tcl_SetErrorCode(interp, "TK", "SAFE", "BITMAP_FILE", NULL); - return NULL; - } - expandedFileName = Tcl_TranslateFileName(interp, fileName, &buffer); - if (expandedFileName == NULL) { - return NULL; - } - pi.chan = Tcl_OpenFileChannel(interp, expandedFileName, "r", 0); - Tcl_DStringFree(&buffer); - if (pi.chan == NULL) { - if (interp != NULL) { - Tcl_ResetResult(interp); - Tcl_SetObjResult(interp, Tcl_ObjPrintf( - "couldn't read bitmap file \"%s\": %s", - fileName, Tcl_PosixError(interp))); - } - return NULL; - } - - if (Tcl_SetChannelOption(interp, pi.chan, "-translation", "binary") - != TCL_OK) { - return NULL; - } - if (Tcl_SetChannelOption(interp, pi.chan, "-encoding", "binary") - != TCL_OK) { - return NULL; - } - } else { - pi.chan = NULL; - } - - /* - * Parse the lines that define the dimensions of the bitmap, plus the - * first line that defines the bitmap data (it declares the name of a data - * variable but doesn't include any actual data). These lines look - * something like the following: - * - * #define foo_width 16 - * #define foo_height 16 - * #define foo_x_hot 3 - * #define foo_y_hot 3 - * static char foo_bits[] = { - * - * The x_hot and y_hot lines may or may not be present. It's important to - * check for "char" in the last line, in order to reject old X10-style - * bitmaps that used shorts. - */ - - width = 0; - height = 0; - hotX = -1; - hotY = -1; - while (1) { - if (NextBitmapWord(&pi) != TCL_OK) { - goto error; - } - if ((pi.wordLength >= 6) && (pi.word[pi.wordLength-6] == '_') - && (strcmp(pi.word+pi.wordLength-6, "_width") == 0)) { - if (NextBitmapWord(&pi) != TCL_OK) { - goto error; - } - width = strtol(pi.word, &end, 0); - if ((end == pi.word) || (*end != 0)) { - goto error; - } - } else if ((pi.wordLength >= 7) && (pi.word[pi.wordLength-7] == '_') - && (strcmp(pi.word+pi.wordLength-7, "_height") == 0)) { - if (NextBitmapWord(&pi) != TCL_OK) { - goto error; - } - height = strtol(pi.word, &end, 0); - if ((end == pi.word) || (*end != 0)) { - goto error; - } - } else if ((pi.wordLength >= 6) && (pi.word[pi.wordLength-6] == '_') - && (strcmp(pi.word+pi.wordLength-6, "_x_hot") == 0)) { - if (NextBitmapWord(&pi) != TCL_OK) { - goto error; - } - hotX = strtol(pi.word, &end, 0); - if ((end == pi.word) || (*end != 0)) { - goto error; - } - } else if ((pi.wordLength >= 6) && (pi.word[pi.wordLength-6] == '_') - && (strcmp(pi.word+pi.wordLength-6, "_y_hot") == 0)) { - if (NextBitmapWord(&pi) != TCL_OK) { - goto error; - } - hotY = strtol(pi.word, &end, 0); - if ((end == pi.word) || (*end != 0)) { - goto error; - } - } else if ((pi.word[0] == 'c') && (strcmp(pi.word, "char") == 0)) { - while (1) { - if (NextBitmapWord(&pi) != TCL_OK) { - goto error; - } - if ((pi.word[0] == '{') && (pi.word[1] == 0)) { - goto getData; - } - } - } else if ((pi.word[0] == '{') && (pi.word[1] == 0)) { - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "format error in bitmap data; looks like it's an" - " obsolete X10 bitmap file", -1)); - Tcl_SetErrorCode(interp, "TK", "IMAGE", "BITMAP", "OBSOLETE", - NULL); - } - goto errorCleanup; - } - } - - /* - * Now we've read everything but the data. Allocate an array and read in - * the data. - */ - - getData: - if ((width <= 0) || (height <= 0)) { - goto error; - } - numBytes = ((width+7)/8) * height; - data = ckalloc(numBytes); - for (p = data; numBytes > 0; p++, numBytes--) { - if (NextBitmapWord(&pi) != TCL_OK) { - goto error; - } - *p = (char) strtol(pi.word, &end, 0); - if (end == pi.word) { - goto error; - } - } - - /* - * All done. Clean up and return. - */ - - if (pi.chan != NULL) { - Tcl_Close(NULL, pi.chan); - } - *widthPtr = width; - *heightPtr = height; - *hotXPtr = hotX; - *hotYPtr = hotY; - return data; - - error: - if (interp != NULL) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "format error in bitmap data", -1)); - Tcl_SetErrorCode(interp, "TK", "IMAGE", "BITMAP", "FORMAT", NULL); - } - - errorCleanup: - if (data != NULL) { - ckfree(data); - } - if (pi.chan != NULL) { - Tcl_Close(NULL, pi.chan); - } - return NULL; -} - -/* - *---------------------------------------------------------------------- - * - * NextBitmapWord -- - * - * This procedure retrieves the next word of information (stuff between - * commas or white space) from a bitmap description. - * - * Results: - * Returns TCL_OK if all went well. In this case the next word, and its - * length, will be availble in *parseInfoPtr. If the end of the bitmap - * description was reached then TCL_ERROR is returned. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static int -NextBitmapWord( - ParseInfo *parseInfoPtr) /* Describes what we're reading and where we - * are in it. */ -{ - const char *src; - char *dst; - int c; - - parseInfoPtr->wordLength = 0; - dst = parseInfoPtr->word; - if (parseInfoPtr->string != NULL) { - for (src = parseInfoPtr->string; isspace(UCHAR(*src)) || (*src == ','); - src++) { - if (*src == 0) { - return TCL_ERROR; - } - } - for ( ; !isspace(UCHAR(*src)) && (*src != ',') && (*src != 0); src++) { - *dst = *src; - dst++; - parseInfoPtr->wordLength++; - if (parseInfoPtr->wordLength > MAX_WORD_LENGTH) { - return TCL_ERROR; - } - } - parseInfoPtr->string = src; - } else { - for (c = GetByte(parseInfoPtr->chan); isspace(UCHAR(c)) || (c == ','); - c = GetByte(parseInfoPtr->chan)) { - if (c == EOF) { - return TCL_ERROR; - } - } - for ( ; !isspace(UCHAR(c)) && (c != ',') && (c != EOF); - c = GetByte(parseInfoPtr->chan)) { - *dst = c; - dst++; - parseInfoPtr->wordLength++; - if (parseInfoPtr->wordLength > MAX_WORD_LENGTH) { - return TCL_ERROR; - } - } - } - if (parseInfoPtr->wordLength == 0) { - return TCL_ERROR; - } - parseInfoPtr->word[parseInfoPtr->wordLength] = 0; - return TCL_OK; -} - -/* - *-------------------------------------------------------------- - * - * ImgBmapCmd -- - * - * This procedure is invoked to process the Tcl command that corresponds - * to an image managed by this module. See the user documentation for - * details on what it does. - * - * Results: - * A standard Tcl result. - * - * Side effects: - * See the user documentation. - * - *-------------------------------------------------------------- - */ - -static int -ImgBmapCmd( - ClientData clientData, /* Information about the image master. */ - Tcl_Interp *interp, /* Current interpreter. */ - int objc, /* Number of arguments. */ - Tcl_Obj *const objv[]) /* Argument objects. */ -{ - static const char *const bmapOptions[] = {"cget", "configure", NULL}; - BitmapMaster *masterPtr = clientData; - int index; - - if (objc < 2) { - Tcl_WrongNumArgs(interp, 1, objv, "option ?arg ...?"); - return TCL_ERROR; - } - if (Tcl_GetIndexFromObjStruct(interp, objv[1], bmapOptions, - sizeof(char *), "option", 0, &index) != TCL_OK) { - return TCL_ERROR; - } - switch (index) { - case 0: /* cget */ - if (objc != 3) { - Tcl_WrongNumArgs(interp, 2, objv, "option"); - return TCL_ERROR; - } - return Tk_ConfigureValue(interp, Tk_MainWindow(interp), configSpecs, - (char *) masterPtr, Tcl_GetString(objv[2]), 0); - case 1: /* configure */ - if (objc == 2) { - return Tk_ConfigureInfo(interp, Tk_MainWindow(interp), - configSpecs, (char *) masterPtr, NULL, 0); - } else if (objc == 3) { - return Tk_ConfigureInfo(interp, Tk_MainWindow(interp), - configSpecs, (char *) masterPtr, - Tcl_GetString(objv[2]), 0); - } else { - return ImgBmapConfigureMaster(masterPtr, objc-2, objv+2, - TK_CONFIG_ARGV_ONLY); - } - default: - Tcl_Panic("bad const entries to bmapOptions in ImgBmapCmd"); - return TCL_OK; - } -} - -/* - *---------------------------------------------------------------------- - * - * ImgBmapGet -- - * - * This procedure is called for each use of a bitmap image in a widget. - * - * Results: - * The return value is a token for the instance, which is passed back to - * us in calls to ImgBmapDisplay and ImgBmapFree. - * - * Side effects: - * A data structure is set up for the instance (or, an existing instance - * is re-used for the new one). - * - *---------------------------------------------------------------------- - */ - -static ClientData -ImgBmapGet( - Tk_Window tkwin, /* Window in which the instance will be - * used. */ - ClientData masterData) /* Pointer to our master structure for the - * image. */ -{ - BitmapMaster *masterPtr = masterData; - BitmapInstance *instancePtr; - - /* - * See if there is already an instance for this window. If so then just - * re-use it. - */ - - for (instancePtr = masterPtr->instancePtr; instancePtr != NULL; - instancePtr = instancePtr->nextPtr) { - if (instancePtr->tkwin == tkwin) { - instancePtr->refCount++; - return instancePtr; - } - } - - /* - * The image isn't already in use in this window. Make a new instance of - * the image. - */ - - instancePtr = ckalloc(sizeof(BitmapInstance)); - instancePtr->refCount = 1; - instancePtr->masterPtr = masterPtr; - instancePtr->tkwin = tkwin; - instancePtr->fg = NULL; - instancePtr->bg = NULL; - instancePtr->bitmap = None; - instancePtr->mask = None; - instancePtr->gc = None; - instancePtr->nextPtr = masterPtr->instancePtr; - masterPtr->instancePtr = instancePtr; - ImgBmapConfigureInstance(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; -} - -/* - *---------------------------------------------------------------------- - * - * ImgBmapDisplay -- - * - * This procedure is invoked to draw a bitmap image. - * - * Results: - * None. - * - * Side effects: - * A portion of the image gets rendered in a pixmap or window. - * - *---------------------------------------------------------------------- - */ - -static void -ImgBmapDisplay( - ClientData clientData, /* Pointer to BitmapInstance 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. */ -{ - BitmapInstance *instancePtr = clientData; - int masking; - - /* - * If there's no graphics context, it means that an error occurred while - * creating the image instance so it can't be displayed. - */ - - if (instancePtr->gc == None) { - return; - } - - /* - * If masking is in effect, must modify the mask origin within the - * graphics context to line up with the image's origin. Then draw the - * image and reset the clip origin, if there's a mask. - */ - - masking = (instancePtr->mask != None) || (instancePtr->bg == NULL); - if (masking) { - XSetClipOrigin(display, instancePtr->gc, drawableX - imageX, - drawableY - imageY); - } - XCopyPlane(display, instancePtr->bitmap, drawable, instancePtr->gc, - imageX, imageY, (unsigned) width, (unsigned) height, - drawableX, drawableY, 1); - if (masking) { - XSetClipOrigin(display, instancePtr->gc, 0, 0); - } -} - -/* - *---------------------------------------------------------------------- - * - * ImgBmapFree -- - * - * This procedure is called when a widget ceases to use a particular - * instance of an image. - * - * Results: - * None. - * - * Side effects: - * Internal data structures get cleaned up. - * - *---------------------------------------------------------------------- - */ - -static void -ImgBmapFree( - ClientData clientData, /* Pointer to BitmapInstance structure for - * instance to be displayed. */ - Display *display) /* Display containing window that used image. */ -{ - BitmapInstance *instancePtr = clientData; - BitmapInstance *prevPtr; - - instancePtr->refCount--; - if (instancePtr->refCount > 0) { - return; - } - - /* - * There are no more uses of the image within this widget. Free the - * instance structure. - */ - - if (instancePtr->fg != NULL) { - Tk_FreeColor(instancePtr->fg); - } - if (instancePtr->bg != NULL) { - Tk_FreeColor(instancePtr->bg); - } - if (instancePtr->bitmap != None) { - Tk_FreePixmap(display, instancePtr->bitmap); - } - if (instancePtr->mask != None) { - Tk_FreePixmap(display, instancePtr->mask); - } - if (instancePtr->gc != None) { - Tk_FreeGC(display, instancePtr->gc); - } - 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; - } - ckfree(instancePtr); -} - -/* - *---------------------------------------------------------------------- - * - * ImgBmapDelete -- - * - * This procedure is called by the image code to delete the master - * structure for an image. - * - * Results: - * None. - * - * Side effects: - * Resources associated with the image get freed. - * - *---------------------------------------------------------------------- - */ - -static void -ImgBmapDelete( - ClientData masterData) /* Pointer to BitmapMaster structure for - * image. Must not have any more instances. */ -{ - BitmapMaster *masterPtr = masterData; - - if (masterPtr->instancePtr != NULL) { - Tcl_Panic("tried to delete bitmap image when instances still exist"); - } - masterPtr->tkMaster = NULL; - if (masterPtr->imageCmd != NULL) { - Tcl_DeleteCommandFromToken(masterPtr->interp, masterPtr->imageCmd); - } - if (masterPtr->data != NULL) { - ckfree(masterPtr->data); - } - if (masterPtr->maskData != NULL) { - ckfree(masterPtr->maskData); - } - Tk_FreeOptions(configSpecs, (char *) masterPtr, NULL, 0); - ckfree(masterPtr); -} - -/* - *---------------------------------------------------------------------- - * - * ImgBmapCmdDeletedProc -- - * - * This procedure is invoked when the image command for an image is - * deleted. It deletes the image. - * - * Results: - * None. - * - * Side effects: - * The image is deleted. - * - *---------------------------------------------------------------------- - */ - -static void -ImgBmapCmdDeletedProc( - ClientData clientData) /* Pointer to BitmapMaster structure for - * image. */ -{ - BitmapMaster *masterPtr = clientData; - - masterPtr->imageCmd = NULL; - if (masterPtr->tkMaster != NULL) { - Tk_DeleteImage(masterPtr->interp, Tk_NameOfImage(masterPtr->tkMaster)); - } -} - -/* - *---------------------------------------------------------------------- - * - * GetByte -- - * - * Get the next byte from the open channel. - * - * Results: - * The next byte or EOF. - * - * Side effects: - * We read from the channel. - * - *---------------------------------------------------------------------- - */ - -static int -GetByte( - Tcl_Channel chan) /* The channel we read from. */ -{ - char buffer; - int size; - - size = Tcl_Read(chan, &buffer, 1); - if (size <= 0) { - return EOF; - } else { - return buffer; - } -} - -/* - *---------------------------------------------------------------------- - * - * ImgBmapPsImagemask -- - * - * This procedure generates postscript suitable for rendering a single - * bitmap of an image. A single bitmap image might contain both a - * foreground and a background bitmap. This routine is called once for - * each such bitmap in a bitmap image. - * - * Prior to invoking this routine, the following setup has occurred: - * - * 1. The postscript foreground color has been set to the color used - * to render the bitmap. - * - * 2. The origin of the postscript coordinate system is set to the - * lower left corner of the bitmap. - * - * 3. The postscript coordinate system has been scaled so that the - * entire bitmap is one unit squared. - * - * Results: - * None. - * - * Side effects: - * Postscript code is appended to psObj. - * - *---------------------------------------------------------------------- - */ - -static void -ImgBmapPsImagemask( - Tcl_Obj *psObj, /* Append postscript to this buffer. */ - int width, int height, /* Width and height of the bitmap in pixels */ - char *data) /* Data for the bitmap. */ -{ - int i, j, nBytePerRow; - - /* - * The bit order of bitmaps in Tk is the opposite of the bit order that - * postscript uses. (In Tk, the least significant bit is on the right side - * of the bitmap and in postscript the least significant bit is shown on - * the left.) The following array is used to reverse the order of bits - * within a byte so that the bits will be in the order postscript expects. - */ - - static const unsigned char bit_reverse[] = { - 0, 128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, 112, 240, - 8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, 56, 184, 120, 248, - 4, 132, 68, 196, 36, 164, 100, 228, 20, 148, 84, 212, 52, 180, 116, 244, - 12, 140, 76, 204, 44, 172, 108, 236, 28, 156, 92, 220, 60, 188, 124, 252, - 2, 130, 66, 194, 34, 162, 98, 226, 18, 146, 82, 210, 50, 178, 114, 242, - 10, 138, 74, 202, 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250, - 6, 134, 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246, - 14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, 126, 254, - 1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, 49, 177, 113, 241, - 9, 137, 73, 201, 41, 169, 105, 233, 25, 153, 89, 217, 57, 185, 121, 249, - 5, 133, 69, 197, 37, 165, 101, 229, 21, 149, 85, 213, 53, 181, 117, 245, - 13, 141, 77, 205, 45, 173, 109, 237, 29, 157, 93, 221, 61, 189, 125, 253, - 3, 131, 67, 195, 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243, - 11, 139, 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251, - 7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, 119, 247, - 15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, 63, 191, 127, 255, - }; - - Tcl_AppendPrintfToObj(psObj, - "0 0 moveto %d %d true [%d 0 0 %d 0 %d] {<\n", - width, height, width, -height, height); - - nBytePerRow = (width + 7) / 8; - for (i=0; i<height; i++) { - for (j=0; j<nBytePerRow; j++) { - Tcl_AppendPrintfToObj(psObj, " %02x", - bit_reverse[0xff & data[i*nBytePerRow + j]]); - } - Tcl_AppendToObj(psObj, "\n", -1); - } - - Tcl_AppendToObj(psObj, ">} imagemask \n", -1); -} - -/* - *---------------------------------------------------------------------- - * - * ImgBmapPostscript -- - * - * This procedure generates postscript for rendering a bitmap image. - * - * Results: - * On success, this routine writes postscript code into interp->result - * and returns TCL_OK TCL_ERROR is returned and an error message is left - * in interp->result if anything goes wrong. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static int -ImgBmapPostscript( - ClientData clientData, - Tcl_Interp *interp, - Tk_Window tkwin, - Tk_PostscriptInfo psinfo, - int x, int y, int width, int height, - int prepass) -{ - BitmapMaster *masterPtr = clientData; - Tcl_InterpState interpState; - Tcl_Obj *psObj; - - if (prepass) { - return TCL_OK; - } - - /* - * There is nothing to do for bitmaps with zero width or height. - */ - - if (width<=0 || height<=0 || masterPtr->width<=0 || masterPtr->height<=0){ - return TCL_OK; - } - - /* - * Some postscript implementations cannot handle bitmap strings longer - * than about 60k characters. If the bitmap data is that big or bigger, - * we bail out. - */ - - if (masterPtr->width*masterPtr->height > 60000) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "unable to generate postscript for bitmaps larger than 60000" - " pixels", -1)); - Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "MEMLIMIT", NULL); - return TCL_ERROR; - } - - /* - * Make our working space. - */ - - psObj = Tcl_NewObj(); - interpState = Tcl_SaveInterpState(interp, TCL_OK); - - /* - * Translate the origin of the coordinate system to be the lower-left - * corner of the bitmap and adjust the scale of the coordinate system so - * that entire bitmap covers one square unit of the page. The calling - * function put a "gsave" into the postscript and will add a "grestore" at - * after this routine returns, so it is safe to make whatever changes are - * necessary here. - */ - - if (x != 0 || y != 0) { - Tcl_AppendPrintfToObj(psObj, "%d %d moveto\n", x, y); - } - if (width != 1 || height != 1) { - Tcl_AppendPrintfToObj(psObj, "%d %d scale\n", width, height); - } - - /* - * Color the background, if there is one. This step is skipped if the - * background is transparent. If the background is not transparent and - * there is no background mask, then color the complete rectangle that - * encloses the bitmap. If there is a background mask, then only apply - * color to the bits specified by the mask. - */ - - if ((masterPtr->bgUid != NULL) && (masterPtr->bgUid[0] != '\000')) { - XColor color; - - TkParseColor(Tk_Display(tkwin), Tk_Colormap(tkwin), masterPtr->bgUid, - &color); - Tcl_ResetResult(interp); - if (Tk_PostscriptColor(interp, psinfo, &color) != TCL_OK) { - goto error; - } - Tcl_AppendObjToObj(psObj, Tcl_GetObjResult(interp)); - - if (masterPtr->maskData == NULL) { - Tcl_AppendToObj(psObj, - "0 0 moveto 1 0 rlineto 0 1 rlineto -1 0 rlineto " - "closepath fill\n", -1); - } else { - ImgBmapPsImagemask(psObj, masterPtr->width, masterPtr->height, - masterPtr->maskData); - } - } - - /* - * Draw the bitmap foreground, assuming there is one. - */ - - if ((masterPtr->fgUid != NULL) && (masterPtr->data != NULL)) { - XColor color; - - TkParseColor(Tk_Display(tkwin), Tk_Colormap(tkwin), masterPtr->fgUid, - &color); - Tcl_ResetResult(interp); - if (Tk_PostscriptColor(interp, psinfo, &color) != TCL_OK) { - goto error; - } - Tcl_AppendObjToObj(psObj, Tcl_GetObjResult(interp)); - - ImgBmapPsImagemask(psObj, masterPtr->width, masterPtr->height, - masterPtr->data); - } - - /* - * Plug the accumulated postscript back into the result. - */ - - (void) Tcl_RestoreInterpState(interp, interpState); - Tcl_AppendObjToObj(Tcl_GetObjResult(interp), psObj); - Tcl_DecrRefCount(psObj); - return TCL_OK; - - error: - Tcl_DiscardInterpState(interpState); - Tcl_DecrRefCount(psObj); - return TCL_ERROR; -} - -/* - * Local Variables: - * mode: c - * c-basic-offset: 4 - * fill-column: 78 - * End: - */ |