+++ /dev/null
-/*
- * tkCanvPs.c --
- *
- * This module provides Postscript output support for canvases, including
- * the "postscript" widget command plus a few utility functions used for
- * generating Postscript.
- *
- * Copyright (c) 1991-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution of
- * this file, and for a DISCLAIMER OF ALL WARRANTIES.
- */
-
-#include "tkInt.h"
-#include "tkCanvas.h"
-#include "tkFont.h"
-
-/*
- * See tkCanvas.h for key data structures used to implement canvases.
- */
-
-/*
- * The following definition is used in generating postscript for images and
- * windows.
- */
-
-typedef struct TkColormapData { /* Hold color information for a window */
- int separated; /* Whether to use separate color bands */
- int color; /* Whether window is color or black/white */
- int ncolors; /* Number of color values stored */
- XColor *colors; /* Pixel value -> RGB mappings */
- int red_mask, green_mask, blue_mask; /* Masks and shifts for each */
- int red_shift, green_shift, blue_shift; /* color band */
-} TkColormapData;
-
-/*
- * One of the following structures is created to keep track of Postscript
- * output being generated. It consists mostly of information provided on the
- * widget command line.
- */
-
-typedef struct TkPostscriptInfo {
- int x, y, width, height; /* Area to print, in canvas pixel
- * coordinates. */
- int x2, y2; /* x+width and y+height. */
- char *pageXString; /* String value of "-pagex" option or NULL. */
- char *pageYString; /* String value of "-pagey" option or NULL. */
- double pageX, pageY; /* Postscript coordinates (in points)
- * corresponding to pageXString and
- * pageYString. Don't forget that y-values
- * grow upwards for Postscript! */
- char *pageWidthString; /* Printed width of output. */
- char *pageHeightString; /* Printed height of output. */
- double scale; /* Scale factor for conversion: each pixel
- * maps into this many points. */
- Tk_Anchor pageAnchor; /* How to anchor bbox on Postscript page. */
- int rotate; /* Non-zero means output should be rotated on
- * page (landscape mode). */
- char *fontVar; /* If non-NULL, gives name of global variable
- * containing font mapping information.
- * Malloc'ed. */
- char *colorVar; /* If non-NULL, give name of global variable
- * containing color mapping information.
- * Malloc'ed. */
- char *colorMode; /* Mode for handling colors: "monochrome",
- * "gray", or "color". Malloc'ed. */
- int colorLevel; /* Numeric value corresponding to colorMode: 0
- * for mono, 1 for gray, 2 for color. */
- char *fileName; /* Name of file in which to write Postscript;
- * NULL means return Postscript info as
- * result. Malloc'ed. */
- char *channelName; /* If -channel is specified, the name of the
- * channel to use. */
- Tcl_Channel chan; /* Open channel corresponding to fileName. */
- Tcl_HashTable fontTable; /* Hash table containing names of all font
- * families used in output. The hash table
- * values are not used. */
- int prepass; /* Non-zero means that we're currently in the
- * pre-pass that collects font information, so
- * the Postscript generated isn't relevant. */
- int prolog; /* Non-zero means output should contain the
- * standard prolog in the header. Generated in
- * library/mkpsenc.tcl, stored in the variable
- * ::tk::ps_preamable [sic]. */
- Tk_Window tkwin; /* Window to get font pixel/point transform
- * from. */
-} TkPostscriptInfo;
-
-/*
- * The table below provides a template that's used to process arguments to the
- * canvas "postscript" command and fill in TkPostscriptInfo structures.
- */
-
-static const Tk_ConfigSpec configSpecs[] = {
- {TK_CONFIG_STRING, "-colormap", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, colorVar), 0, NULL},
- {TK_CONFIG_STRING, "-colormode", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, colorMode), 0, NULL},
- {TK_CONFIG_STRING, "-file", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, fileName), 0, NULL},
- {TK_CONFIG_STRING, "-channel", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, channelName), 0, NULL},
- {TK_CONFIG_STRING, "-fontmap", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, fontVar), 0, NULL},
- {TK_CONFIG_PIXELS, "-height", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, height), 0, NULL},
- {TK_CONFIG_ANCHOR, "-pageanchor", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, pageAnchor), 0, NULL},
- {TK_CONFIG_STRING, "-pageheight", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, pageHeightString), 0, NULL},
- {TK_CONFIG_STRING, "-pagewidth", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, pageWidthString), 0, NULL},
- {TK_CONFIG_STRING, "-pagex", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, pageXString), 0, NULL},
- {TK_CONFIG_STRING, "-pagey", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, pageYString), 0, NULL},
- {TK_CONFIG_BOOLEAN, "-prolog", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, prolog), 0, NULL},
- {TK_CONFIG_BOOLEAN, "-rotate", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, rotate), 0, NULL},
- {TK_CONFIG_PIXELS, "-width", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, width), 0, NULL},
- {TK_CONFIG_PIXELS, "-x", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, x), 0, NULL},
- {TK_CONFIG_PIXELS, "-y", NULL, NULL,
- "", Tk_Offset(TkPostscriptInfo, y), 0, NULL},
- {TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0, NULL}
-};
-
-/*
- * Forward declarations for functions defined later in this file:
- */
-
-static int GetPostscriptPoints(Tcl_Interp *interp,
- char *string, double *doublePtr);
-static void PostscriptBitmap(Tk_Window tkwin, Pixmap bitmap,
- int startX, int startY, int width, int height,
- Tcl_Obj *psObj);
-static inline Tcl_Obj * GetPostscriptBuffer(Tcl_Interp *interp);
-\f
-/*
- *--------------------------------------------------------------
- *
- * TkCanvPostscriptCmd --
- *
- * This function is invoked to process the "postscript" options of the
- * widget command for canvas widgets. See the user documentation for
- * details on what it does.
- *
- * Results:
- * A standard Tcl result.
- *
- * Side effects:
- * See the user documentation.
- *
- *--------------------------------------------------------------
- */
-
- /* ARGSUSED */
-int
-TkCanvPostscriptCmd(
- TkCanvas *canvasPtr, /* Information about canvas widget. */
- Tcl_Interp *interp, /* Current interpreter. */
- int argc, /* Number of arguments. */
- const char **argv) /* Argument strings. Caller has already parsed
- * this command enough to know that argv[1] is
- * "postscript". */
-{
- TkPostscriptInfo psInfo, *psInfoPtr = &psInfo;
- Tk_PostscriptInfo oldInfoPtr;
- int result;
- Tk_Item *itemPtr;
-#define STRING_LENGTH 400
- const char *p;
- time_t now;
- size_t length;
- Tk_Window tkwin = canvasPtr->tkwin;
- Tcl_HashSearch search;
- Tcl_HashEntry *hPtr;
- Tcl_DString buffer;
- Tcl_Obj *preambleObj;
- Tcl_Obj *psObj;
- int deltaX = 0, deltaY = 0; /* Offset of lower-left corner of area to be
- * marked up, measured in canvas units from
- * the positioning point on the page (reflects
- * anchor position). Initial values needed
- * only to stop compiler warnings. */
-
- /*
- * Get the generic preamble. We only ever bother with the ASCII encoding;
- * the others just make life too complicated and never actually worked as
- * such.
- */
-
- result = Tcl_EvalEx(interp, "::tk::ensure_psenc_is_loaded", -1, 0);
- if (result != TCL_OK) {
- return result;
- }
- preambleObj = Tcl_GetVar2Ex(interp, "::tk::ps_preamble", NULL,
- TCL_LEAVE_ERR_MSG);
- if (preambleObj == NULL) {
- return TCL_ERROR;
- }
- Tcl_IncrRefCount(preambleObj);
- Tcl_ResetResult(interp);
- psObj = Tcl_NewObj();
-
- /*
- * Initialize the data structure describing Postscript generation, then
- * process all the arguments to fill the data structure in.
- */
-
- oldInfoPtr = canvasPtr->psInfo;
- canvasPtr->psInfo = (Tk_PostscriptInfo) psInfoPtr;
- psInfo.x = canvasPtr->xOrigin;
- psInfo.y = canvasPtr->yOrigin;
- psInfo.width = -1;
- psInfo.height = -1;
- psInfo.pageXString = NULL;
- psInfo.pageYString = NULL;
- psInfo.pageX = 72*4.25;
- psInfo.pageY = 72*5.5;
- psInfo.pageWidthString = NULL;
- psInfo.pageHeightString = NULL;
- psInfo.scale = 1.0;
- psInfo.pageAnchor = TK_ANCHOR_CENTER;
- psInfo.rotate = 0;
- psInfo.fontVar = NULL;
- psInfo.colorVar = NULL;
- psInfo.colorMode = NULL;
- psInfo.colorLevel = 0;
- psInfo.fileName = NULL;
- psInfo.channelName = NULL;
- psInfo.chan = NULL;
- psInfo.prepass = 0;
- psInfo.prolog = 1;
- psInfo.tkwin = tkwin;
- Tcl_InitHashTable(&psInfo.fontTable, TCL_STRING_KEYS);
- result = Tk_ConfigureWidget(interp, tkwin, configSpecs, argc-2, argv+2,
- (char *) &psInfo, TK_CONFIG_ARGV_ONLY);
- if (result != TCL_OK) {
- goto cleanup;
- }
-
- if (psInfo.width == -1) {
- psInfo.width = Tk_Width(tkwin);
- }
- if (psInfo.height == -1) {
- psInfo.height = Tk_Height(tkwin);
- }
- psInfo.x2 = psInfo.x + psInfo.width;
- psInfo.y2 = psInfo.y + psInfo.height;
-
- if (psInfo.pageXString != NULL) {
- if (GetPostscriptPoints(interp, psInfo.pageXString,
- &psInfo.pageX) != TCL_OK) {
- goto cleanup;
- }
- }
- if (psInfo.pageYString != NULL) {
- if (GetPostscriptPoints(interp, psInfo.pageYString,
- &psInfo.pageY) != TCL_OK) {
- goto cleanup;
- }
- }
- if (psInfo.pageWidthString != NULL) {
- if (GetPostscriptPoints(interp, psInfo.pageWidthString,
- &psInfo.scale) != TCL_OK) {
- goto cleanup;
- }
- psInfo.scale /= psInfo.width;
- } else if (psInfo.pageHeightString != NULL) {
- if (GetPostscriptPoints(interp, psInfo.pageHeightString,
- &psInfo.scale) != TCL_OK) {
- goto cleanup;
- }
- psInfo.scale /= psInfo.height;
- } else {
- psInfo.scale = (72.0/25.4)*WidthMMOfScreen(Tk_Screen(tkwin));
- psInfo.scale /= WidthOfScreen(Tk_Screen(tkwin));
- }
- switch (psInfo.pageAnchor) {
- case TK_ANCHOR_NW:
- case TK_ANCHOR_W:
- case TK_ANCHOR_SW:
- deltaX = 0;
- break;
- case TK_ANCHOR_N:
- case TK_ANCHOR_CENTER:
- case TK_ANCHOR_S:
- deltaX = -psInfo.width/2;
- break;
- case TK_ANCHOR_NE:
- case TK_ANCHOR_E:
- case TK_ANCHOR_SE:
- deltaX = -psInfo.width;
- break;
- }
- switch (psInfo.pageAnchor) {
- case TK_ANCHOR_NW:
- case TK_ANCHOR_N:
- case TK_ANCHOR_NE:
- deltaY = - psInfo.height;
- break;
- case TK_ANCHOR_W:
- case TK_ANCHOR_CENTER:
- case TK_ANCHOR_E:
- deltaY = -psInfo.height/2;
- break;
- case TK_ANCHOR_SW:
- case TK_ANCHOR_S:
- case TK_ANCHOR_SE:
- deltaY = 0;
- break;
- }
-
- if (psInfo.colorMode == NULL) {
- psInfo.colorLevel = 2;
- } else {
- length = strlen(psInfo.colorMode);
- if (strncmp(psInfo.colorMode, "monochrome", length) == 0) {
- psInfo.colorLevel = 0;
- } else if (strncmp(psInfo.colorMode, "gray", length) == 0) {
- psInfo.colorLevel = 1;
- } else if (strncmp(psInfo.colorMode, "color", length) == 0) {
- psInfo.colorLevel = 2;
- } else {
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "bad color mode \"%s\": must be monochrome, gray, or color",
- psInfo.colorMode));
- Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "COLORMODE", NULL);
- result = TCL_ERROR;
- goto cleanup;
- }
- }
-
- if (psInfo.fileName != NULL) {
- /*
- * Check that -file and -channel are not both specified.
- */
-
- if (psInfo.channelName != NULL) {
- Tcl_SetObjResult(interp, Tcl_NewStringObj(
- "can't specify both -file and -channel", -1));
- Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "USAGE", NULL);
- result = TCL_ERROR;
- goto cleanup;
- }
-
- /*
- * Check that we are not in a safe interpreter. If we are, disallow
- * the -file specification.
- */
-
- if (Tcl_IsSafe(interp)) {
- Tcl_SetObjResult(interp, Tcl_NewStringObj(
- "can't specify -file in a safe interpreter", -1));
- Tcl_SetErrorCode(interp, "TK", "SAFE", "PS_FILE", NULL);
- result = TCL_ERROR;
- goto cleanup;
- }
-
- p = Tcl_TranslateFileName(interp, psInfo.fileName, &buffer);
- if (p == NULL) {
- goto cleanup;
- }
- psInfo.chan = Tcl_OpenFileChannel(interp, p, "w", 0666);
- Tcl_DStringFree(&buffer);
- if (psInfo.chan == NULL) {
- goto cleanup;
- }
- }
-
- if (psInfo.channelName != NULL) {
- int mode;
-
- /*
- * Check that the channel is found in this interpreter and that it is
- * open for writing.
- */
-
- psInfo.chan = Tcl_GetChannel(interp, psInfo.channelName, &mode);
- if (psInfo.chan == (Tcl_Channel) NULL) {
- result = TCL_ERROR;
- goto cleanup;
- }
- if (!(mode & TCL_WRITABLE)) {
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "channel \"%s\" wasn't opened for writing",
- psInfo.channelName));
- Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "UNWRITABLE",NULL);
- result = TCL_ERROR;
- goto cleanup;
- }
- }
-
- /*
- * Make a pre-pass over all of the items, generating Postscript and then
- * throwing it away. The purpose of this pass is just to collect
- * information about all the fonts in use, so that we can output font
- * information in the proper form required by the Document Structuring
- * Conventions.
- */
-
- psInfo.prepass = 1;
- for (itemPtr = canvasPtr->firstItemPtr; itemPtr != NULL;
- itemPtr = itemPtr->nextPtr) {
- if ((itemPtr->x1 >= psInfo.x2) || (itemPtr->x2 < psInfo.x)
- || (itemPtr->y1 >= psInfo.y2) || (itemPtr->y2 < psInfo.y)) {
- continue;
- }
- if (itemPtr->typePtr->postscriptProc == NULL) {
- continue;
- }
- result = itemPtr->typePtr->postscriptProc(interp,
- (Tk_Canvas) canvasPtr, itemPtr, 1);
- Tcl_ResetResult(interp);
- if (result != TCL_OK) {
- /*
- * An error just occurred. Just skip out of this loop. There's no
- * need to report the error now; it can be reported later (errors
- * can happen later that don't happen now, so we still have to
- * check for errors later anyway).
- */
-
- break;
- }
- }
- psInfo.prepass = 0;
-
- /*
- * Generate the header and prolog for the Postscript.
- */
-
- if (psInfo.prolog) {
- Tcl_AppendToObj(psObj,
- "%!PS-Adobe-3.0 EPSF-3.0\n"
- "%%Creator: Tk Canvas Widget\n", -1);
-
-#ifdef HAVE_PW_GECOS
- if (!Tcl_IsSafe(interp)) {
- struct passwd *pwPtr = getpwuid(getuid()); /* INTL: Native. */
-
- Tcl_AppendPrintfToObj(psObj,
- "%%%%For: %s\n", (pwPtr ? pwPtr->pw_gecos : "Unknown"));
- endpwent();
- }
-#endif /* HAVE_PW_GECOS */
- Tcl_AppendPrintfToObj(psObj,
- "%%%%Title: Window %s\n", Tk_PathName(tkwin));
- time(&now);
- Tcl_AppendPrintfToObj(psObj,
- "%%%%CreationDate: %s", ctime(&now)); /* INTL: Native. */
- if (!psInfo.rotate) {
- Tcl_AppendPrintfToObj(psObj,
- "%%%%BoundingBox: %d %d %d %d\n",
- (int) (psInfo.pageX + psInfo.scale*deltaX),
- (int) (psInfo.pageY + psInfo.scale*deltaY),
- (int) (psInfo.pageX + psInfo.scale*(deltaX + psInfo.width)
- + 1.0),
- (int) (psInfo.pageY + psInfo.scale*(deltaY + psInfo.height)
- + 1.0));
- } else {
- Tcl_AppendPrintfToObj(psObj,
- "%%%%BoundingBox: %d %d %d %d\n",
- (int) (psInfo.pageX - psInfo.scale*(deltaY+psInfo.height)),
- (int) (psInfo.pageY + psInfo.scale*deltaX),
- (int) (psInfo.pageX - psInfo.scale*deltaY + 1.0),
- (int) (psInfo.pageY + psInfo.scale*(deltaX + psInfo.width)
- + 1.0));
- }
- Tcl_AppendPrintfToObj(psObj,
- "%%%%Pages: 1\n"
- "%%%%DocumentData: Clean7Bit\n"
- "%%%%Orientation: %s\n",
- psInfo.rotate ? "Landscape" : "Portrait");
- p = "%%%%DocumentNeededResources: font %s\n";
- for (hPtr = Tcl_FirstHashEntry(&psInfo.fontTable, &search);
- hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
- Tcl_AppendPrintfToObj(psObj, p,
- Tcl_GetHashKey(&psInfo.fontTable, hPtr));
- p = "%%%%+ font %s\n";
- }
- Tcl_AppendToObj(psObj, "%%EndComments\n\n", -1);
-
- /*
- * Insert the prolog
- */
-
- Tcl_AppendObjToObj(psObj, preambleObj);
-
- if (psInfo.chan != NULL) {
- if (Tcl_WriteObj(psInfo.chan, psObj) == -1) {
- channelWriteFailed:
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "problem writing postscript data to channel: %s",
- Tcl_PosixError(interp)));
- result = TCL_ERROR;
- goto cleanup;
- }
- Tcl_DecrRefCount(psObj);
- psObj = Tcl_NewObj();
- }
-
- /*
- * Document setup: set the color level and include fonts.
- */
-
- Tcl_AppendPrintfToObj(psObj,
- "%%%%BeginSetup\n/CL %d def\n", psInfo.colorLevel);
- for (hPtr = Tcl_FirstHashEntry(&psInfo.fontTable, &search);
- hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
- Tcl_AppendPrintfToObj(psObj,
- "%%%%IncludeResource: font %s\n",
- (char *) Tcl_GetHashKey(&psInfo.fontTable, hPtr));
- }
- Tcl_AppendToObj(psObj, "%%EndSetup\n\n", -1);
-
- /*
- * Page setup: move to page positioning point, rotate if needed, set
- * scale factor, offset for proper anchor position, and set clip
- * region.
- */
-
- Tcl_AppendToObj(psObj, "%%Page: 1 1\nsave\n", -1);
- Tcl_AppendPrintfToObj(psObj,
- "%.1f %.1f translate\n", psInfo.pageX, psInfo.pageY);
- if (psInfo.rotate) {
- Tcl_AppendToObj(psObj, "90 rotate\n", -1);
- }
- Tcl_AppendPrintfToObj(psObj,
- "%.4g %.4g scale\n", psInfo.scale, psInfo.scale);
- Tcl_AppendPrintfToObj(psObj,
- "%d %d translate\n", deltaX - psInfo.x, deltaY);
- Tcl_AppendPrintfToObj(psObj,
- "%d %.15g moveto %d %.15g lineto %d %.15g lineto %d %.15g "
- "lineto closepath clip newpath\n",
- psInfo.x, Tk_PostscriptY((double)psInfo.y,
- (Tk_PostscriptInfo)psInfoPtr),
- psInfo.x2, Tk_PostscriptY((double)psInfo.y,
- (Tk_PostscriptInfo)psInfoPtr),
- psInfo.x2, Tk_PostscriptY((double)psInfo.y2,
- (Tk_PostscriptInfo)psInfoPtr),
- psInfo.x, Tk_PostscriptY((double)psInfo.y2,
- (Tk_PostscriptInfo)psInfoPtr));
- if (psInfo.chan != NULL) {
- if (Tcl_WriteObj(psInfo.chan, psObj) == -1) {
- goto channelWriteFailed;
- }
- Tcl_DecrRefCount(psObj);
- psObj = Tcl_NewObj();
- }
- }
-
- /*
- * Iterate through all the items, having each relevant one draw itself.
- * Quit if any of the items returns an error.
- */
-
- result = TCL_OK;
- for (itemPtr = canvasPtr->firstItemPtr; itemPtr != NULL;
- itemPtr = itemPtr->nextPtr) {
- if ((itemPtr->x1 >= psInfo.x2) || (itemPtr->x2 < psInfo.x)
- || (itemPtr->y1 >= psInfo.y2) || (itemPtr->y2 < psInfo.y)) {
- continue;
- }
- if (itemPtr->typePtr->postscriptProc == NULL) {
- continue;
- }
- if (itemPtr->state == TK_STATE_HIDDEN) {
- continue;
- }
-
- Tcl_ResetResult(interp);
- result = itemPtr->typePtr->postscriptProc(interp,
- (Tk_Canvas) canvasPtr, itemPtr, 0);
- if (result != TCL_OK) {
- Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf(
- "\n (generating Postscript for item %d)",
- itemPtr->id));
- goto cleanup;
- }
-
- Tcl_AppendToObj(psObj, "gsave\n", -1);
- Tcl_AppendObjToObj(psObj, Tcl_GetObjResult(interp));
- Tcl_AppendToObj(psObj, "grestore\n", -1);
-
- if (psInfo.chan != NULL) {
- if (Tcl_WriteObj(psInfo.chan, psObj) == -1) {
- goto channelWriteFailed;
- }
- Tcl_DecrRefCount(psObj);
- psObj = Tcl_NewObj();
- }
- }
-
- /*
- * Output page-end information, such as commands to print the page and
- * document trailer stuff.
- */
-
- if (psInfo.prolog) {
- Tcl_AppendToObj(psObj,
- "restore showpage\n\n"
- "%%Trailer\n"
- "end\n"
- "%%EOF\n", -1);
-
- if (psInfo.chan != NULL) {
- if (Tcl_WriteObj(psInfo.chan, psObj) == -1) {
- goto channelWriteFailed;
- }
- }
- }
-
- if (psInfo.chan == NULL) {
- Tcl_SetObjResult(interp, psObj);
- psObj = Tcl_NewObj();
- }
-
- /*
- * Clean up psInfo to release malloc'ed stuff.
- */
-
- cleanup:
- if (psInfo.pageXString != NULL) {
- ckfree(psInfo.pageXString);
- }
- if (psInfo.pageYString != NULL) {
- ckfree(psInfo.pageYString);
- }
- if (psInfo.pageWidthString != NULL) {
- ckfree(psInfo.pageWidthString);
- }
- if (psInfo.pageHeightString != NULL) {
- ckfree(psInfo.pageHeightString);
- }
- if (psInfo.fontVar != NULL) {
- ckfree(psInfo.fontVar);
- }
- if (psInfo.colorVar != NULL) {
- ckfree(psInfo.colorVar);
- }
- if (psInfo.colorMode != NULL) {
- ckfree(psInfo.colorMode);
- }
- if (psInfo.fileName != NULL) {
- ckfree(psInfo.fileName);
- }
- if ((psInfo.chan != NULL) && (psInfo.channelName == NULL)) {
- Tcl_Close(interp, psInfo.chan);
- }
- if (psInfo.channelName != NULL) {
- ckfree(psInfo.channelName);
- }
- Tcl_DeleteHashTable(&psInfo.fontTable);
- canvasPtr->psInfo = (Tk_PostscriptInfo) oldInfoPtr;
- Tcl_DecrRefCount(preambleObj);
- Tcl_DecrRefCount(psObj);
- return result;
-}
-\f
-static inline Tcl_Obj *
-GetPostscriptBuffer(
- Tcl_Interp *interp)
-{
- Tcl_Obj *psObj = Tcl_GetObjResult(interp);
-
- if (Tcl_IsShared(psObj)) {
- psObj = Tcl_DuplicateObj(psObj);
- Tcl_SetObjResult(interp, psObj);
- }
- return psObj;
-}
-\f
-/*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptColor --
- *
- * This function is called by individual canvas items when they want to
- * set a color value for output. Given information about an X color, this
- * function will generate Postscript commands to set up an appropriate
- * color in Postscript.
- *
- * Results:
- * Returns a standard Tcl return value. If an error occurs then an error
- * message will be left in the interp's result. If no error occurs, then
- * additional Postscript will be appended to the interp's result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
-int
-Tk_PostscriptColor(
- Tcl_Interp *interp,
- Tk_PostscriptInfo psInfo, /* Postscript info. */
- XColor *colorPtr) /* Information about color. */
-{
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
- double red, green, blue;
-
- if (psInfoPtr->prepass) {
- return TCL_OK;
- }
-
- /*
- * If there is a color map defined, then look up the color's name in the
- * map and use the Postscript commands found there, if there are any.
- */
-
- if (psInfoPtr->colorVar != NULL) {
- const char *cmdString = Tcl_GetVar2(interp, psInfoPtr->colorVar,
- Tk_NameOfColor(colorPtr), 0);
-
- if (cmdString != NULL) {
- Tcl_AppendPrintfToObj(GetPostscriptBuffer(interp),
- "%s\n", cmdString);
- return TCL_OK;
- }
- }
-
- /*
- * No color map entry for this color. Grab the color's intensities and
- * output Postscript commands for them. Special note: X uses a range of
- * 0-65535 for intensities, but most displays only use a range of 0-255,
- * which maps to (0, 256, 512, ... 65280) in the X scale. This means that
- * there's no way to get perfect white, since the highest intensity is
- * only 65280 out of 65535. To work around this problem, rescale the X
- * intensity to a 0-255 scale and use that as the basis for the Postscript
- * colors. This scheme still won't work if the display only uses 4 bits
- * per color, but most diplays use at least 8 bits.
- */
-
- red = ((double) (((int) colorPtr->red) >> 8))/255.0;
- green = ((double) (((int) colorPtr->green) >> 8))/255.0;
- blue = ((double) (((int) colorPtr->blue) >> 8))/255.0;
- Tcl_AppendPrintfToObj(GetPostscriptBuffer(interp),
- "%.3f %.3f %.3f setrgbcolor AdjustColor\n",
- red, green, blue);
- return TCL_OK;
-}
-\f
-/*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptFont --
- *
- * This function is called by individual canvas items when they want to
- * output text. Given information about an X font, this function will
- * generate Postscript commands to set up an appropriate font in
- * Postscript.
- *
- * Results:
- * Returns a standard Tcl return value. If an error occurs then an error
- * message will be left in the interp's result. If no error occurs, then
- * additional Postscript will be appended to the interp's result.
- *
- * Side effects:
- * The Postscript font name is entered into psInfoPtr->fontTable if it
- * wasn't already there.
- *
- *--------------------------------------------------------------
- */
-
-int
-Tk_PostscriptFont(
- Tcl_Interp *interp,
- Tk_PostscriptInfo psInfo, /* Postscript Info. */
- Tk_Font tkfont) /* Information about font in which text is to
- * be printed. */
-{
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
- Tcl_DString ds;
- int i, points;
- const char *fontname;
-
- /*
- * First, look up the font's name in the font map, if there is one. If
- * there is an entry for this font, it consists of a list containing font
- * name and size. Use this information.
- */
-
- if (psInfoPtr->fontVar != NULL) {
- const char *name = Tk_NameOfFont(tkfont);
- Tcl_Obj **objv;
- int objc;
- double size;
- Tcl_Obj *list = Tcl_GetVar2Ex(interp, psInfoPtr->fontVar, name, 0);
-
- if (list != NULL) {
- if (Tcl_ListObjGetElements(interp, list, &objc, &objv) != TCL_OK
- || objc != 2
- || (fontname = Tcl_GetString(objv[0]))[0] == '\0'
- || strchr(fontname, ' ') != NULL
- || Tcl_GetDoubleFromObj(interp, objv[1], &size) != TCL_OK
- || size <= 0) {
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "bad font map entry for \"%s\": \"%s\"",
- name, Tcl_GetString(list)));
- Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "FONTMAP",
- NULL);
- return TCL_ERROR;
- }
-
- Tcl_AppendPrintfToObj(GetPostscriptBuffer(interp),
- "/%s findfont %d scalefont%s setfont\n",
- fontname, (int) size,
- strncasecmp(fontname, "Symbol", 7) ? " ISOEncode" : "");
- Tcl_CreateHashEntry(&psInfoPtr->fontTable, fontname, &i);
- return TCL_OK;
- }
- }
-
- /*
- * Nothing in the font map, so fall back to the old guessing technique.
- */
-
- Tcl_DStringInit(&ds);
- points = Tk_PostscriptFontName(tkfont, &ds);
- fontname = Tcl_DStringValue(&ds);
- Tcl_AppendPrintfToObj(GetPostscriptBuffer(interp),
- "/%s findfont %d scalefont%s setfont\n",
- fontname, TkFontGetPoints(psInfoPtr->tkwin, points),
- strncasecmp(fontname, "Symbol", 7) ? " ISOEncode" : "");
- Tcl_CreateHashEntry(&psInfoPtr->fontTable, Tcl_DStringValue(&ds), &i);
- Tcl_DStringFree(&ds);
-
- return TCL_OK;
-}
-\f
-/*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptBitmap --
- *
- * This function is called to output the contents of a sub-region of a
- * bitmap in proper image data format for Postscript (i.e. data between
- * angle brackets, one bit per pixel).
- *
- * Results:
- * Returns a standard Tcl return value. If an error occurs then an error
- * message will be left in the interp's result. If no error occurs, then
- * additional Postscript will be appended to the interp's result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
-int
-Tk_PostscriptBitmap(
- Tcl_Interp *interp,
- Tk_Window tkwin,
- Tk_PostscriptInfo psInfo, /* Postscript info. */
- Pixmap bitmap, /* Bitmap for which to generate Postscript. */
- int startX, int startY, /* Coordinates of upper-left corner of
- * rectangular region to output. */
- int width, int height) /* Height of rectangular region. */
-{
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
-
- if (psInfoPtr->prepass) {
- return TCL_OK;
- }
-
- PostscriptBitmap(tkwin, bitmap, startX, startY, width, height,
- GetPostscriptBuffer(interp));
- return TCL_OK;
-}
-
-static void
-PostscriptBitmap(
- Tk_Window tkwin,
- Pixmap bitmap, /* Bitmap for which to generate Postscript. */
- int startX, int startY, /* Coordinates of upper-left corner of
- * rectangular region to output. */
- int width, int height, /* Height of rectangular region. */
- Tcl_Obj *psObj) /* Where to append the postscript. */
-{
- XImage *imagePtr;
- int charsInLine, x, y, lastX, lastY, value, mask;
- unsigned int totalWidth, totalHeight;
- Window dummyRoot;
- int dummyX, dummyY;
- unsigned dummyBorderwidth, dummyDepth;
-
- /*
- * The following call should probably be a call to Tk_SizeOfBitmap
- * instead, but it seems that we are occasionally invoked by custom item
- * types that create their own bitmaps without registering them with Tk.
- * XGetGeometry is a bit slower than Tk_SizeOfBitmap, but it shouldn't
- * matter here.
- */
-
- XGetGeometry(Tk_Display(tkwin), bitmap, &dummyRoot,
- (int *) &dummyX, (int *) &dummyY, (unsigned int *) &totalWidth,
- (unsigned int *) &totalHeight, &dummyBorderwidth, &dummyDepth);
- imagePtr = XGetImage(Tk_Display(tkwin), bitmap, 0, 0,
- totalWidth, totalHeight, 1, XYPixmap);
-
- Tcl_AppendToObj(psObj, "<", -1);
- mask = 0x80;
- value = 0;
- charsInLine = 0;
- lastX = startX + width - 1;
- lastY = startY + height - 1;
- for (y = lastY; y >= startY; y--) {
- for (x = startX; x <= lastX; x++) {
- if (XGetPixel(imagePtr, x, y)) {
- value |= mask;
- }
- mask >>= 1;
- if (mask == 0) {
- Tcl_AppendPrintfToObj(psObj, "%02x", value);
- mask = 0x80;
- value = 0;
- charsInLine += 2;
- if (charsInLine >= 60) {
- Tcl_AppendToObj(psObj, "\n", -1);
- charsInLine = 0;
- }
- }
- }
- if (mask != 0x80) {
- Tcl_AppendPrintfToObj(psObj, "%02x", value);
- mask = 0x80;
- value = 0;
- charsInLine += 2;
- }
- }
- Tcl_AppendToObj(psObj, ">", -1);
-
- XDestroyImage(imagePtr);
-}
-\f
-/*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptStipple --
- *
- * This function is called by individual canvas items when they have
- * created a path that they'd like to be filled with a stipple pattern.
- * Given information about an X bitmap, this function will generate
- * Postscript commands to fill the current clip region using a stipple
- * pattern defined by the bitmap.
- *
- * Results:
- * Returns a standard Tcl return value. If an error occurs then an error
- * message will be left in the interp's result. If no error occurs, then
- * additional Postscript will be appended to the interp's result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
-int
-Tk_PostscriptStipple(
- Tcl_Interp *interp,
- Tk_Window tkwin,
- Tk_PostscriptInfo psInfo, /* Interpreter for returning Postscript or
- * error message. */
- Pixmap bitmap) /* Bitmap to use for stippling. */
-{
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
- int width, height;
- Window dummyRoot;
- int dummyX, dummyY;
- unsigned dummyBorderwidth, dummyDepth;
- Tcl_Obj *psObj;
-
- if (psInfoPtr->prepass) {
- return TCL_OK;
- }
-
- /*
- * The following call should probably be a call to Tk_SizeOfBitmap
- * instead, but it seems that we are occasionally invoked by custom item
- * types that create their own bitmaps without registering them with Tk.
- * XGetGeometry is a bit slower than Tk_SizeOfBitmap, but it shouldn't
- * matter here.
- */
-
- XGetGeometry(Tk_Display(tkwin), bitmap, &dummyRoot,
- (int *) &dummyX, (int *) &dummyY, (unsigned *) &width,
- (unsigned *) &height, &dummyBorderwidth, &dummyDepth);
-
- psObj = GetPostscriptBuffer(interp);
- Tcl_AppendPrintfToObj(psObj, "%d %d ", width, height);
- PostscriptBitmap(tkwin, bitmap, 0, 0, width, height, psObj);
- Tcl_AppendToObj(psObj, " StippleFill\n", -1);
- return TCL_OK;
-}
-\f
-/*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptY --
- *
- * Given a y-coordinate in local coordinates, this function returns a
- * y-coordinate to use for Postscript output. Required because canvases
- * have their origin in the top-left, but postscript pages have their
- * origin in the bottom left.
- *
- * Results:
- * Returns the Postscript coordinate that corresponds to "y".
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
-double
-Tk_PostscriptY(
- double y, /* Y-coordinate in canvas coords. */
- Tk_PostscriptInfo psInfo) /* Postscript info */
-{
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
-
- return psInfoPtr->y2 - y;
-}
-\f
-/*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptPath --
- *
- * Given an array of points for a path, generate Postscript commands to
- * create the path.
- *
- * Results:
- * Postscript commands get appended to what's in the interp's result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
-void
-Tk_PostscriptPath(
- Tcl_Interp *interp,
- Tk_PostscriptInfo psInfo, /* Canvas on whose behalf Postscript is being
- * generated. */
- double *coordPtr, /* Pointer to first in array of 2*numPoints
- * coordinates giving points for path. */
- int numPoints) /* Number of points at *coordPtr. */
-{
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
- Tcl_Obj *psObj;
-
- if (psInfoPtr->prepass) {
- return;
- }
-
- psObj = GetPostscriptBuffer(interp);
- Tcl_AppendPrintfToObj(psObj, "%.15g %.15g moveto\n",
- coordPtr[0], Tk_PostscriptY(coordPtr[1], psInfo));
- for (numPoints--, coordPtr += 2; numPoints > 0;
- numPoints--, coordPtr += 2) {
- Tcl_AppendPrintfToObj(psObj, "%.15g %.15g lineto\n",
- coordPtr[0], Tk_PostscriptY(coordPtr[1], psInfo));
- }
-}
-\f
-/*
- *--------------------------------------------------------------
- *
- * GetPostscriptPoints --
- *
- * Given a string, returns the number of Postscript points corresponding
- * to that string.
- *
- * Results:
- * The return value is a standard Tcl return result. If TCL_OK is
- * returned, then everything went well and the screen distance is stored
- * at *doublePtr; otherwise TCL_ERROR is returned and an error message is
- * left in the interp's result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
-static int
-GetPostscriptPoints(
- Tcl_Interp *interp, /* Use this for error reporting. */
- char *string, /* String describing a screen distance. */
- double *doublePtr) /* Place to store converted result. */
-{
- char *end;
- double d;
-
- d = strtod(string, &end);
- if (end == string) {
- goto error;
- }
- while ((*end != '\0') && isspace(UCHAR(*end))) {
- end++;
- }
- switch (*end) {
- case 'c':
- d *= 72.0/2.54;
- end++;
- break;
- case 'i':
- d *= 72.0;
- end++;
- break;
- case 'm':
- d *= 72.0/25.4;
- end++;
- break;
- case 0:
- break;
- case 'p':
- end++;
- break;
- default:
- goto error;
- }
- while ((*end != '\0') && isspace(UCHAR(*end))) {
- end++;
- }
- if (*end != 0) {
- goto error;
- }
- *doublePtr = d;
- return TCL_OK;
-
- error:
- Tcl_SetObjResult(interp, Tcl_ObjPrintf("bad distance \"%s\"", string));
- Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "POINTS", NULL);
- return TCL_ERROR;
-}
-\f
-/*
- *--------------------------------------------------------------
- *
- * TkImageGetColor --
- *
- * This function converts a pixel value to three floating point numbers,
- * representing the amount of red, green, and blue in that pixel on the
- * screen. It makes use of colormap data passed as an argument, and
- * should work for all Visual types.
- *
- * This implementation is bogus on Windows because the colormap data is
- * never filled in. Instead all postscript generated data coming through
- * here is expected to be RGB color data. To handle lower bit-depth
- * images properly, XQueryColors must be implemented for Windows.
- *
- * Results:
- * Returns red, green, and blue color values in the range 0 to 1. There
- * are no error returns.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
-#ifdef _WIN32
-#include <windows.h>
-
-/*
- * We could just define these instead of pulling in windows.h.
- #define GetRValue(rgb) ((BYTE)(rgb))
- #define GetGValue(rgb) ((BYTE)(((WORD)(rgb)) >> 8))
- #define GetBValue(rgb) ((BYTE)((rgb)>>16))
- */
-
-#else /* !_WIN32 */
-
-#define GetRValue(rgb) ((rgb & cdata->red_mask) >> cdata->red_shift)
-#define GetGValue(rgb) ((rgb & cdata->green_mask) >> cdata->green_shift)
-#define GetBValue(rgb) ((rgb & cdata->blue_mask) >> cdata->blue_shift)
-
-#endif /* _WIN32 */
-
-#if defined(_WIN32) || defined(MAC_OSX_TK)
-static void
-TkImageGetColor(
- TkColormapData *cdata, /* Colormap data */
- unsigned long pixel, /* Pixel value to look up */
- double *red, double *green, double *blue)
- /* Color data to return */
-{
- *red = (double) GetRValue(pixel) / 255.0;
- *green = (double) GetGValue(pixel) / 255.0;
- *blue = (double) GetBValue(pixel) / 255.0;
-}
-#else /* ! (_WIN32 || MAC_OSX_TK) */
-static void
-TkImageGetColor(
- TkColormapData *cdata, /* Colormap data */
- unsigned long pixel, /* Pixel value to look up */
- double *red, double *green, double *blue)
- /* Color data to return */
-{
- if (cdata->separated) {
- int r = GetRValue(pixel);
- int g = GetGValue(pixel);
- int b = GetBValue(pixel);
-
- *red = cdata->colors[r].red / 65535.0;
- *green = cdata->colors[g].green / 65535.0;
- *blue = cdata->colors[b].blue / 65535.0;
- } else {
- *red = cdata->colors[pixel].red / 65535.0;
- *green = cdata->colors[pixel].green / 65535.0;
- *blue = cdata->colors[pixel].blue / 65535.0;
- }
-}
-#endif /* _WIN32 || MAC_OSX_TK */
-\f
-/*
- *--------------------------------------------------------------
- *
- * TkPostscriptImage --
- *
- * This function is called to output the contents of an image in
- * Postscript, using a format appropriate for the current color mode
- * (i.e. one bit per pixel in monochrome, one byte per pixel in gray, and
- * three bytes per pixel in color).
- *
- * Results:
- * Returns a standard Tcl return value. If an error occurs then an error
- * message will be left in interp->result. If no error occurs, then
- * additional Postscript will be appended to interp->result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
-int
-TkPostscriptImage(
- Tcl_Interp *interp,
- Tk_Window tkwin,
- Tk_PostscriptInfo psInfo, /* postscript info */
- XImage *ximage, /* Image to draw */
- int x, int y, /* First pixel to output */
- int width, int height) /* Width and height of area */
-{
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
- int xx, yy, band, maxRows;
- double red, green, blue;
- int bytesPerLine = 0, maxWidth = 0;
- int level = psInfoPtr->colorLevel;
- Colormap cmap;
- int i, ncolors;
- Visual *visual;
- TkColormapData cdata;
- Tcl_Obj *psObj;
-
- if (psInfoPtr->prepass) {
- return TCL_OK;
- }
-
- cmap = Tk_Colormap(tkwin);
- visual = Tk_Visual(tkwin);
-
- /*
- * Obtain information about the colormap, ie the mapping between pixel
- * values and RGB values. The code below should work for all Visual types.
- */
-
- ncolors = visual->map_entries;
- cdata.colors = ckalloc(sizeof(XColor) * ncolors);
- cdata.ncolors = ncolors;
-
- if (visual->class == DirectColor || visual->class == TrueColor) {
- cdata.separated = 1;
- cdata.red_mask = visual->red_mask;
- cdata.green_mask = visual->green_mask;
- cdata.blue_mask = visual->blue_mask;
- cdata.red_shift = 0;
- cdata.green_shift = 0;
- cdata.blue_shift = 0;
-
- while ((0x0001 & (cdata.red_mask >> cdata.red_shift)) == 0) {
- cdata.red_shift ++;
- }
- while ((0x0001 & (cdata.green_mask >> cdata.green_shift)) == 0) {
- cdata.green_shift ++;
- }
- while ((0x0001 & (cdata.blue_mask >> cdata.blue_shift)) == 0) {
- cdata.blue_shift ++;
- }
-
- for (i = 0; i < ncolors; i ++) {
- cdata.colors[i].pixel =
- ((i << cdata.red_shift) & cdata.red_mask) |
- ((i << cdata.green_shift) & cdata.green_mask) |
- ((i << cdata.blue_shift) & cdata.blue_mask);
- }
- } else {
- cdata.separated=0;
- for (i = 0; i < ncolors; i ++) {
- cdata.colors[i].pixel = i;
- }
- }
-
- if (visual->class == StaticGray || visual->class == GrayScale) {
- cdata.color = 0;
- } else {
- cdata.color = 1;
- }
-
- XQueryColors(Tk_Display(tkwin), cmap, cdata.colors, ncolors);
-
- /*
- * Figure out which color level to use (possibly lower than the one
- * specified by the user). For example, if the user specifies color with
- * monochrome screen, use gray or monochrome mode instead.
- */
-
- if (!cdata.color && level >= 2) {
- level = 1;
- }
-
- if (!cdata.color && cdata.ncolors == 2) {
- level = 0;
- }
-
- /*
- * Check that at least one row of the image can be represented with a
- * string less than 64 KB long (this is a limit in the Postscript
- * interpreter).
- */
-
- switch (level) {
- case 0: bytesPerLine = (width + 7) / 8; maxWidth = 240000; break;
- case 1: bytesPerLine = width; maxWidth = 60000; break;
- default: bytesPerLine = 3 * width; maxWidth = 20000; break;
- }
-
- if (bytesPerLine > 60000) {
- Tcl_ResetResult(interp);
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "can't generate Postscript for images more than %d pixels wide",
- maxWidth));
- Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "MEMLIMIT", NULL);
- ckfree(cdata.colors);
- return TCL_ERROR;
- }
-
- maxRows = 60000 / bytesPerLine;
- psObj = GetPostscriptBuffer(interp);
-
- for (band = height-1; band >= 0; band -= maxRows) {
- int rows = (band >= maxRows) ? maxRows : band + 1;
- int lineLen = 0;
-
- switch (level) {
- case 0:
- Tcl_AppendPrintfToObj(psObj, "%d %d 1 matrix {\n<", width, rows);
- break;
- case 1:
- Tcl_AppendPrintfToObj(psObj, "%d %d 8 matrix {\n<", width, rows);
- break;
- default:
- Tcl_AppendPrintfToObj(psObj, "%d %d 8 matrix {\n<", width, rows);
- break;
- }
- for (yy = band; yy > band - rows; yy--) {
- switch (level) {
- case 0: {
- /*
- * Generate data for image in monochrome mode. No attempt at
- * dithering is made--instead, just set a threshold.
- */
-
- unsigned char mask = 0x80;
- unsigned char data = 0x00;
-
- for (xx = x; xx< x+width; xx++) {
- TkImageGetColor(&cdata, XGetPixel(ximage, xx, yy),
- &red, &green, &blue);
- if (0.30 * red + 0.59 * green + 0.11 * blue > 0.5) {
- data |= mask;
- }
- mask >>= 1;
- if (mask == 0) {
- Tcl_AppendPrintfToObj(psObj, "%02X", data);
- lineLen += 2;
- if (lineLen > 60) {
- lineLen = 0;
- Tcl_AppendToObj(psObj, "\n", -1);
- }
- mask = 0x80;
- data = 0x00;
- }
- }
- if ((width % 8) != 0) {
- Tcl_AppendPrintfToObj(psObj, "%02X", data);
- mask = 0x80;
- data = 0x00;
- }
- break;
- }
- case 1:
- /*
- * Generate data in gray mode; in this case, take a weighted
- * sum of the red, green, and blue values.
- */
-
- for (xx = x; xx < x+width; xx ++) {
- TkImageGetColor(&cdata, XGetPixel(ximage, xx, yy),
- &red, &green, &blue);
- Tcl_AppendPrintfToObj(psObj, "%02X",
- (int) floor(0.5 + 255.0 *
- (0.30 * red + 0.59 * green + 0.11 * blue)));
- lineLen += 2;
- if (lineLen > 60) {
- lineLen = 0;
- Tcl_AppendToObj(psObj, "\n", -1);
- }
- }
- break;
- default:
- /*
- * Finally, color mode. Here, just output the red, green, and
- * blue values directly.
- */
-
- for (xx = x; xx < x+width; xx++) {
- TkImageGetColor(&cdata, XGetPixel(ximage, xx, yy),
- &red, &green, &blue);
- Tcl_AppendPrintfToObj(psObj, "%02X%02X%02X",
- (int) floor(0.5 + 255.0 * red),
- (int) floor(0.5 + 255.0 * green),
- (int) floor(0.5 + 255.0 * blue));
- lineLen += 6;
- if (lineLen > 60) {
- lineLen = 0;
- Tcl_AppendToObj(psObj, "\n", -1);
- }
- }
- break;
- }
- }
- switch (level) {
- case 0: case 1:
- Tcl_AppendToObj(psObj, ">\n} image\n", -1); break;
- default:
- Tcl_AppendToObj(psObj, ">\n} false 3 colorimage\n", -1); break;
- }
- Tcl_AppendPrintfToObj(psObj, "0 %d translate\n", rows);
- }
- ckfree(cdata.colors);
- return TCL_OK;
-}
-\f
-/*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptPhoto --
- *
- * This function is called to output the contents of a photo image in
- * Postscript, using a format appropriate for the requested postscript
- * color mode (i.e. one byte per pixel in gray, and three bytes per pixel
- * in color).
- *
- * Results:
- * Returns a standard Tcl return value. If an error occurs then an error
- * message will be left in interp->result. If no error occurs, then
- * additional Postscript will be appended to the interpreter's result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
-int
-Tk_PostscriptPhoto(
- Tcl_Interp *interp,
- Tk_PhotoImageBlock *blockPtr,
- Tk_PostscriptInfo psInfo,
- int width, int height)
-{
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
- int colorLevel = psInfoPtr->colorLevel;
- const char *displayOperation, *decode;
- unsigned char *pixelPtr;
- int bpc, xx, yy, lineLen, alpha;
- float red, green, blue;
- int bytesPerLine = 0, maxWidth = 0;
- unsigned char opaque = 255;
- unsigned char *alphaPtr;
- int alphaOffset, alphaPitch, alphaIncr;
- Tcl_Obj *psObj;
-
- if (psInfoPtr->prepass) {
- return TCL_OK;
- }
-
- if (colorLevel != 0) {
- /*
- * Color and gray-scale code.
- */
-
- displayOperation = "TkPhotoColor";
- } else {
- /*
- * Monochrome-only code
- */
-
- displayOperation = "TkPhotoMono";
- }
-
- /*
- * Check that at least one row of the image can be represented with a
- * string less than 64 KB long (this is a limit in the Postscript
- * interpreter).
- */
-
- switch (colorLevel) {
- case 0: bytesPerLine = (width + 7) / 8; maxWidth = 240000; break;
- case 1: bytesPerLine = width; maxWidth = 60000; break;
- default: bytesPerLine = 3 * width; maxWidth = 20000; break;
- }
- if (bytesPerLine > 60000) {
- Tcl_ResetResult(interp);
- Tcl_SetObjResult(interp, Tcl_ObjPrintf(
- "can't generate Postscript for images more than %d pixels wide",
- maxWidth));
- Tcl_SetErrorCode(interp, "TK", "CANVAS", "PS", "MEMLIMIT", NULL);
- return TCL_ERROR;
- }
-
- /*
- * Set up the postscript code except for the image-data stream.
- */
-
- psObj = GetPostscriptBuffer(interp);
- switch (colorLevel) {
- case 0:
- Tcl_AppendToObj(psObj, "/DeviceGray setcolorspace\n\n", -1);
- decode = "1 0";
- bpc = 1;
- break;
- case 1:
- Tcl_AppendToObj(psObj, "/DeviceGray setcolorspace\n\n", -1);
- decode = "0 1";
- bpc = 8;
- break;
- default:
- Tcl_AppendToObj(psObj, "/DeviceRGB setcolorspace\n\n", -1);
- decode = "0 1 0 1 0 1";
- bpc = 8;
- break;
- }
-
- Tcl_AppendPrintfToObj(psObj,
- "<<\n /ImageType 1\n"
- " /Width %d\n /Height %d\n /BitsPerComponent %d\n"
- " /DataSource currentfile\n /ASCIIHexDecode filter\n"
- " /ImageMatrix [1 0 0 -1 0 %d]\n /Decode [%s]\n>>\n"
- "1 %s\n",
- width, height, bpc, height, decode, displayOperation);
-
- /*
- * Check the PhotoImageBlock information. We assume that:
- * if pixelSize is 1,2 or 4, the image is R,G,B,A;
- * if pixelSize is 3, the image is R,G,B and offset[3] is bogus.
- */
-
- if (blockPtr->pixelSize == 3) {
- /*
- * No alpha information: the whole image is opaque.
- */
-
- alphaPtr = &opaque;
- alphaPitch = alphaIncr = alphaOffset = 0;
- } else {
- /*
- * Set up alpha handling.
- */
-
- alphaPtr = blockPtr->pixelPtr;
- alphaPitch = blockPtr->pitch;
- alphaIncr = blockPtr->pixelSize;
- alphaOffset = blockPtr->offset[3];
- }
-
- for (yy = 0, lineLen=0; yy < height; yy++) {
- switch (colorLevel) {
- case 0: {
- /*
- * Generate data for image in monochrome mode. No attempt at
- * dithering is made--instead, just set a threshold. To handle
- * transparecies we need to output two lines: one for the black
- * pixels, one for the white ones.
- */
-
- unsigned char mask = 0x80;
- unsigned char data = 0x00;
-
- for (xx = 0; xx< width; xx ++) {
- pixelPtr = blockPtr->pixelPtr + (yy * blockPtr->pitch)
- + (xx *blockPtr->pixelSize);
-
- red = pixelPtr[blockPtr->offset[0]];
- green = pixelPtr[blockPtr->offset[1]];
- blue = pixelPtr[blockPtr->offset[2]];
-
- alpha = *(alphaPtr + (yy * alphaPitch)
- + (xx * alphaIncr) + alphaOffset);
-
- /*
- * If pixel is less than threshold, then it is black.
- */
-
- if ((alpha != 0) &&
- (0.3086*red + 0.6094*green + 0.082*blue < 128)) {
- data |= mask;
- }
- mask >>= 1;
- if (mask == 0) {
- Tcl_AppendPrintfToObj(psObj, "%02X", data);
- lineLen += 2;
- if (lineLen >= 60) {
- lineLen = 0;
- Tcl_AppendToObj(psObj, "\n", -1);
- }
- mask = 0x80;
- data = 0x00;
- }
- }
- if ((width % 8) != 0) {
- Tcl_AppendPrintfToObj(psObj, "%02X", data);
- mask = 0x80;
- data = 0x00;
- }
-
- mask = 0x80;
- data = 0x00;
- for (xx=0 ; xx<width ; xx++) {
- pixelPtr = blockPtr->pixelPtr + (yy * blockPtr->pitch)
- + (xx *blockPtr->pixelSize);
-
- red = pixelPtr[blockPtr->offset[0]];
- green = pixelPtr[blockPtr->offset[1]];
- blue = pixelPtr[blockPtr->offset[2]];
-
- alpha = *(alphaPtr + (yy * alphaPitch)
- + (xx * alphaIncr) + alphaOffset);
-
- /*
- * If pixel is greater than threshold, then it is white.
- */
-
- if ((alpha != 0) &&
- (0.3086*red + 0.6094*green + 0.082*blue >= 128)) {
- data |= mask;
- }
- mask >>= 1;
- if (mask == 0) {
- Tcl_AppendPrintfToObj(psObj, "%02X", data);
- lineLen += 2;
- if (lineLen >= 60) {
- lineLen = 0;
- Tcl_AppendToObj(psObj, "\n", -1);
- }
- mask = 0x80;
- data = 0x00;
- }
- }
- if ((width % 8) != 0) {
- Tcl_AppendPrintfToObj(psObj, "%02X", data);
- mask = 0x80;
- data = 0x00;
- }
- break;
- }
- case 1: {
- /*
- * Generate transparency data. We must prevent a transparent value
- * of 0 because of a bug in some HP printers.
- */
-
- for (xx = 0; xx < width; xx ++) {
- alpha = *(alphaPtr + (yy * alphaPitch)
- + (xx * alphaIncr) + alphaOffset);
- Tcl_AppendPrintfToObj(psObj, "%02X", alpha | 0x01);
- lineLen += 2;
- if (lineLen >= 60) {
- lineLen = 0;
- Tcl_AppendToObj(psObj, "\n", -1);
- }
- }
-
- /*
- * Generate data in gray mode; in this case, take a weighted sum
- * of the red, green, and blue values.
- */
-
- for (xx = 0; xx < width; xx ++) {
- pixelPtr = blockPtr->pixelPtr + (yy * blockPtr->pitch)
- + (xx *blockPtr->pixelSize);
-
- red = pixelPtr[blockPtr->offset[0]];
- green = pixelPtr[blockPtr->offset[1]];
- blue = pixelPtr[blockPtr->offset[2]];
-
- Tcl_AppendPrintfToObj(psObj, "%02X", (int) floor(0.5 +
- ( 0.3086 * red + 0.6094 * green + 0.0820 * blue)));
- lineLen += 2;
- if (lineLen >= 60) {
- lineLen = 0;
- Tcl_AppendToObj(psObj, "\n", -1);
- }
- }
- break;
- }
- default:
- /*
- * Generate transparency data. We must prevent a transparent value
- * of 0 because of a bug in some HP printers.
- */
-
- for (xx = 0; xx < width; xx ++) {
- alpha = *(alphaPtr + (yy * alphaPitch)
- + (xx * alphaIncr) + alphaOffset);
- Tcl_AppendPrintfToObj(psObj, "%02X", alpha | 0x01);
- lineLen += 2;
- if (lineLen >= 60) {
- lineLen = 0;
- Tcl_AppendToObj(psObj, "\n", -1);
- }
- }
-
- /*
- * Finally, color mode. Here, just output the red, green, and blue
- * values directly.
- */
-
- for (xx = 0; xx < width; xx ++) {
- pixelPtr = blockPtr->pixelPtr + (yy * blockPtr->pitch)
- + (xx * blockPtr->pixelSize);
-
- Tcl_AppendPrintfToObj(psObj, "%02X%02X%02X",
- pixelPtr[blockPtr->offset[0]],
- pixelPtr[blockPtr->offset[1]],
- pixelPtr[blockPtr->offset[2]]);
- lineLen += 6;
- if (lineLen >= 60) {
- lineLen = 0;
- Tcl_AppendToObj(psObj, "\n", -1);
- }
- }
- break;
- }
- }
-
- /*
- * The end-of-data marker.
- */
-
- Tcl_AppendToObj(psObj, ">\n", -1);
- return TCL_OK;
-}
-\f
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 4
- * fill-column: 78
- * End:
- */
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