tkCanvPs.c
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- /*
- * tkCanvPs.c --
- *
- * This module provides Postscript output support for canvases,
- * including the "postscript" widget command plus a few utility
- * procedures 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.
- *
- * RCS: @(#) $Id: tkCanvPs.c,v 1.13.2.1 2004/02/23 10:49:29 das Exp $
- */
- #include "tkInt.h"
- #include "tkCanvas.h"
- #include "tkPort.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 file prolog.ps in the header. */
- } TkPostscriptInfo;
- /*
- * The table below provides a template that's used to process arguments
- * to the canvas "postscript" command and fill in TkPostscriptInfo
- * structures.
- */
- static Tk_ConfigSpec configSpecs[] = {
- {TK_CONFIG_STRING, "-colormap", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, colorVar), 0},
- {TK_CONFIG_STRING, "-colormode", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, colorMode), 0},
- {TK_CONFIG_STRING, "-file", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, fileName), 0},
- {TK_CONFIG_STRING, "-channel", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, channelName), 0},
- {TK_CONFIG_STRING, "-fontmap", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, fontVar), 0},
- {TK_CONFIG_PIXELS, "-height", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, height), 0},
- {TK_CONFIG_ANCHOR, "-pageanchor", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, pageAnchor), 0},
- {TK_CONFIG_STRING, "-pageheight", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, pageHeightString), 0},
- {TK_CONFIG_STRING, "-pagewidth", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, pageWidthString), 0},
- {TK_CONFIG_STRING, "-pagex", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, pageXString), 0},
- {TK_CONFIG_STRING, "-pagey", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, pageYString), 0},
- {TK_CONFIG_BOOLEAN, "-prolog", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, prolog), 0},
- {TK_CONFIG_BOOLEAN, "-rotate", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, rotate), 0},
- {TK_CONFIG_PIXELS, "-width", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, width), 0},
- {TK_CONFIG_PIXELS, "-x", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, x), 0},
- {TK_CONFIG_PIXELS, "-y", (char *) NULL, (char *) NULL,
- "", Tk_Offset(TkPostscriptInfo, y), 0},
- {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
- (char *) NULL, 0, 0}
- };
- /*
- * Forward declarations for procedures defined later in this file:
- */
- static int GetPostscriptPoints _ANSI_ARGS_((Tcl_Interp *interp,
- char *string, double *doublePtr));
- /*
- *--------------------------------------------------------------
- *
- * TkCanvPostscriptCmd --
- *
- * This procedure 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(canvasPtr, interp, argc, argv)
- 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;
- Tk_PostscriptInfo oldInfoPtr;
- int result;
- Tk_Item *itemPtr;
- #define STRING_LENGTH 400
- char string[STRING_LENGTH+1];
- CONST char *p;
- time_t now;
- size_t length;
- Tk_Window tkwin = canvasPtr->tkwin;
- 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. */
- Tcl_HashSearch search;
- Tcl_HashEntry *hPtr;
- Tcl_DString buffer;
- char psenccmd[]="::tk::ensure_psenc_is_loaded";
- /*
- *----------------------------------------------------------------
- * Initialize the data structure describing Postscript generation,
- * then process all the arguments to fill the data structure in.
- *----------------------------------------------------------------
- */
- result = Tcl_EvalEx(interp,psenccmd,-1,TCL_EVAL_GLOBAL);
- if (result != TCL_OK) {
- return result;
- }
- oldInfoPtr = canvasPtr->psInfo;
- canvasPtr->psInfo = (Tk_PostscriptInfo) &psInfo;
- 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;
- 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_AppendResult(interp, "bad color mode "",
- psInfo.colorMode, "": must be monochrome, ",
- "gray, or color", (char *) NULL);
- goto cleanup;
- }
- }
- if (psInfo.fileName != NULL) {
- /*
- * Check that -file and -channel are not both specified.
- */
- if (psInfo.channelName != NULL) {
- Tcl_AppendResult(interp, "can't specify both -file",
- " and -channel", (char *) 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_AppendResult(interp, "can't specify -file in a",
- " safe interpreter", (char *) 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) == 0) {
- Tcl_AppendResult(interp, "channel "",
- psInfo.channelName, "" wasn't opened for writing",
- (char *) 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_AppendResult(interp, "%!PS-Adobe-3.0 EPSF-3.0n",
- "%%Creator: Tk Canvas Widgetn", (char *) NULL);
- #ifdef HAVE_PW_GECOS
- if (!Tcl_IsSafe(interp)) {
- struct passwd *pwPtr = getpwuid(getuid()); /* INTL: Native. */
- Tcl_AppendResult(interp, "%%For: ",
- (pwPtr != NULL) ? pwPtr->pw_gecos : "Unknown", "n",
- (char *) NULL);
- endpwent();
- }
- #endif /* HAVE_PW_GECOS */
- Tcl_AppendResult(interp, "%%Title: Window ",
- Tk_PathName(tkwin), "n", (char *) NULL);
- time(&now);
- Tcl_AppendResult(interp, "%%CreationDate: ",
- ctime(&now), (char *) NULL); /* INTL: Native. */
- if (!psInfo.rotate) {
- sprintf(string, "%d %d %d %d",
- (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 {
- sprintf(string, "%d %d %d %d",
- (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_AppendResult(interp, "%%BoundingBox: ", string,
- "n", (char *) NULL);
- Tcl_AppendResult(interp, "%%Pages: 1n",
- "%%DocumentData: Clean7Bitn", (char *) NULL);
- Tcl_AppendResult(interp, "%%Orientation: ",
- psInfo.rotate ? "Landscapen" : "Portraitn", (char *) NULL);
- p = "%%DocumentNeededResources: font ";
- for (hPtr = Tcl_FirstHashEntry(&psInfo.fontTable, &search);
- hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
- Tcl_AppendResult(interp, p,
- Tcl_GetHashKey(&psInfo.fontTable, hPtr),
- "n", (char *) NULL);
- p = "%%+ font ";
- }
- Tcl_AppendResult(interp, "%%EndCommentsnn", (char *) NULL);
- /*
- * Insert the prolog
- */
- Tcl_AppendResult(interp, Tcl_GetVar(interp,"::tk::ps_preamable",
- TCL_GLOBAL_ONLY), (char *) NULL);
- if (psInfo.chan != NULL) {
- Tcl_Write(psInfo.chan, Tcl_GetStringResult(interp), -1);
- Tcl_ResetResult(canvasPtr->interp);
- }
- /*
- *-----------------------------------------------------------
- * Document setup: set the color level and include fonts.
- *-----------------------------------------------------------
- */
- sprintf(string, "/CL %d defn", psInfo.colorLevel);
- Tcl_AppendResult(interp, "%%BeginSetupn", string,
- (char *) NULL);
- for (hPtr = Tcl_FirstHashEntry(&psInfo.fontTable, &search);
- hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
- Tcl_AppendResult(interp, "%%IncludeResource: font ",
- Tcl_GetHashKey(&psInfo.fontTable, hPtr), "n", (char *) NULL);
- }
- Tcl_AppendResult(interp, "%%EndSetupnn", (char *) NULL);
- /*
- *-----------------------------------------------------------
- * Page setup: move to page positioning point, rotate if
- * needed, set scale factor, offset for proper anchor position,
- * and set clip region.
- *-----------------------------------------------------------
- */
- Tcl_AppendResult(interp, "%%Page: 1 1n", "saven",
- (char *) NULL);
- sprintf(string, "%.1f %.1f translaten", psInfo.pageX, psInfo.pageY);
- Tcl_AppendResult(interp, string, (char *) NULL);
- if (psInfo.rotate) {
- Tcl_AppendResult(interp, "90 rotaten", (char *) NULL);
- }
- sprintf(string, "%.4g %.4g scalen", psInfo.scale, psInfo.scale);
- Tcl_AppendResult(interp, string, (char *) NULL);
- sprintf(string, "%d %d translaten", deltaX - psInfo.x, deltaY);
- Tcl_AppendResult(interp, string, (char *) NULL);
- sprintf(string, "%d %.15g moveto %d %.15g lineto %d %.15g lineto %d %.15g",
- psInfo.x,
- Tk_PostscriptY((double) psInfo.y, (Tk_PostscriptInfo) &psInfo),
- psInfo.x2,
- Tk_PostscriptY((double) psInfo.y, (Tk_PostscriptInfo) &psInfo),
- psInfo.x2,
- Tk_PostscriptY((double) psInfo.y2, (Tk_PostscriptInfo) &psInfo),
- psInfo.x,
- Tk_PostscriptY((double) psInfo.y2, (Tk_PostscriptInfo) &psInfo));
- Tcl_AppendResult(interp, string,
- " lineto closepath clip newpathn", (char *) NULL);
- }
- if (psInfo.chan != NULL) {
- Tcl_Write(psInfo.chan, Tcl_GetStringResult(interp), -1);
- Tcl_ResetResult(canvasPtr->interp);
- }
- /*
- *---------------------------------------------------------------------
- * 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_AppendResult(interp, "gsaven", (char *) NULL);
- result = (*itemPtr->typePtr->postscriptProc)(interp,
- (Tk_Canvas) canvasPtr, itemPtr, 0);
- if (result != TCL_OK) {
- char msg[64 + TCL_INTEGER_SPACE];
- sprintf(msg, "n (generating Postscript for item %d)",
- itemPtr->id);
- Tcl_AddErrorInfo(interp, msg);
- goto cleanup;
- }
- Tcl_AppendResult(interp, "grestoren", (char *) NULL);
- if (psInfo.chan != NULL) {
- Tcl_Write(psInfo.chan, Tcl_GetStringResult(interp), -1);
- Tcl_ResetResult(interp);
- }
- }
- /*
- *---------------------------------------------------------------------
- * Output page-end information, such as commands to print the page
- * and document trailer stuff.
- *---------------------------------------------------------------------
- */
- if (psInfo.prolog) {
- Tcl_AppendResult(interp, "restore showpagenn",
- "%%Trailernendn%%EOFn", (char *) NULL);
- }
- if (psInfo.chan != NULL) {
- Tcl_Write(psInfo.chan, Tcl_GetStringResult(interp), -1);
- Tcl_ResetResult(canvasPtr->interp);
- }
- /*
- * 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;
- return result;
- }
- /*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptColor --
- *
- * This procedure is called by individual canvas items when
- * they want to set a color value for output. Given information
- * about an X color, this procedure 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(interp, psInfo, colorPtr)
- Tcl_Interp *interp;
- Tk_PostscriptInfo psInfo; /* Postscript info. */
- XColor *colorPtr; /* Information about color. */
- {
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
- int tmp;
- double red, green, blue;
- char string[200];
- 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;
- cmdString = Tcl_GetVar2(interp, psInfoPtr->colorVar,
- Tk_NameOfColor(colorPtr), 0);
- if (cmdString != NULL) {
- Tcl_AppendResult(interp, cmdString, "n", (char *) NULL);
- 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.
- */
- tmp = colorPtr->red;
- red = ((double) (tmp >> 8))/255.0;
- tmp = colorPtr->green;
- green = ((double) (tmp >> 8))/255.0;
- tmp = colorPtr->blue;
- blue = ((double) (tmp >> 8))/255.0;
- sprintf(string, "%.3f %.3f %.3f setrgbcolor AdjustColorn",
- red, green, blue);
- Tcl_AppendResult(interp, string, (char *) NULL);
- return TCL_OK;
- }
- /*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptFont --
- *
- * This procedure is called by individual canvas items when
- * they want to output text. Given information about an X
- * font, this procedure 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(interp, psInfo, tkfont)
- 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;
- char *end;
- char pointString[TCL_INTEGER_SPACE];
- Tcl_DString ds;
- int i, points;
- /*
- * 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.
- */
- Tcl_DStringInit(&ds);
-
- if (psInfoPtr->fontVar != NULL) {
- CONST char *list;
- int argc;
- double size;
- CONST char **argv;
- CONST char *name;
- name = Tk_NameOfFont(tkfont);
- list = Tcl_GetVar2(interp, psInfoPtr->fontVar, name, 0);
- if (list != NULL) {
- if (Tcl_SplitList(interp, list, &argc, &argv) != TCL_OK) {
- badMapEntry:
- Tcl_ResetResult(interp);
- Tcl_AppendResult(interp, "bad font map entry for "", name,
- "": "", list, """, (char *) NULL);
- return TCL_ERROR;
- }
- if (argc != 2) {
- goto badMapEntry;
- }
- size = strtod(argv[1], &end);
- if ((size <= 0) || (*end != 0)) {
- goto badMapEntry;
- }
- Tcl_DStringAppend(&ds, argv[0], -1);
- points = (int) size;
-
- ckfree((char *) argv);
- goto findfont;
- }
- }
- points = Tk_PostscriptFontName(tkfont, &ds);
- findfont:
- sprintf(pointString, "%d", points);
- Tcl_AppendResult(interp, "/", Tcl_DStringValue(&ds), " findfont ",
- pointString, " scalefont ", (char *) NULL);
- if (strncasecmp(Tcl_DStringValue(&ds), "Symbol", 7) != 0) {
- Tcl_AppendResult(interp, "ISOEncode ", (char *) NULL);
- }
- Tcl_AppendResult(interp, "setfontn", (char *) NULL);
- Tcl_CreateHashEntry(&psInfoPtr->fontTable, Tcl_DStringValue(&ds), &i);
- Tcl_DStringFree(&ds);
- return TCL_OK;
- }
- /*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptBitmap --
- *
- * This procedure 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(interp, tkwin, psInfo, bitmap, startX, startY, width,
- height)
- Tcl_Interp *interp;
- Tk_Window tkwin;
- Tk_PostscriptInfo psInfo; /* Postscript info. */
- Pixmap bitmap; /* Bitmap for which to generate
- * Postscript. */
- int startX, startY; /* Coordinates of upper-left corner
- * of rectangular region to output. */
- int width, height; /* Height of rectangular region. */
- {
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
- XImage *imagePtr;
- int charsInLine, x, y, lastX, lastY, value, mask;
- unsigned int totalWidth, totalHeight;
- char string[100];
- Window dummyRoot;
- int dummyX, dummyY;
- unsigned dummyBorderwidth, dummyDepth;
- 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 int *) &totalWidth,
- (unsigned int *) &totalHeight, &dummyBorderwidth, &dummyDepth);
- imagePtr = XGetImage(Tk_Display(tkwin), bitmap, 0, 0,
- totalWidth, totalHeight, 1, XYPixmap);
- Tcl_AppendResult(interp, "<", (char *) NULL);
- 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) {
- sprintf(string, "%02x", value);
- Tcl_AppendResult(interp, string, (char *) NULL);
- mask = 0x80;
- value = 0;
- charsInLine += 2;
- if (charsInLine >= 60) {
- Tcl_AppendResult(interp, "n", (char *) NULL);
- charsInLine = 0;
- }
- }
- }
- if (mask != 0x80) {
- sprintf(string, "%02x", value);
- Tcl_AppendResult(interp, string, (char *) NULL);
- mask = 0x80;
- value = 0;
- charsInLine += 2;
- }
- }
- Tcl_AppendResult(interp, ">", (char *) NULL);
- XDestroyImage(imagePtr);
- return TCL_OK;
- }
- /*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptStipple --
- *
- * This procedure 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 procedure 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(interp, tkwin, psInfo, bitmap)
- 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;
- char string[TCL_INTEGER_SPACE * 2];
- Window dummyRoot;
- int dummyX, dummyY;
- unsigned dummyBorderwidth, dummyDepth;
- 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);
- sprintf(string, "%d %d ", width, height);
- Tcl_AppendResult(interp, string, (char *) NULL);
- if (Tk_PostscriptBitmap(interp, tkwin, psInfo, bitmap, 0, 0,
- width, height) != TCL_OK) {
- return TCL_ERROR;
- }
- Tcl_AppendResult(interp, " StippleFilln", (char *) NULL);
- return TCL_OK;
- }
- /*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptY --
- *
- * Given a y-coordinate in local coordinates, this procedure
- * returns a y-coordinate to use for Postscript output.
- *
- * Results:
- * Returns the Postscript coordinate that corresponds to
- * "y".
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
- double
- Tk_PostscriptY(y, psInfo)
- double y; /* Y-coordinate in canvas coords. */
- Tk_PostscriptInfo psInfo; /* Postscript info */
- {
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
- return psInfoPtr->y2 - y;
- }
- /*
- *--------------------------------------------------------------
- *
- * 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(interp, psInfo, coordPtr, numPoints)
- 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;
- char buffer[200];
- if (psInfoPtr->prepass) {
- return;
- }
- sprintf(buffer, "%.15g %.15g moveton", coordPtr[0],
- Tk_PostscriptY(coordPtr[1], psInfo));
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- for (numPoints--, coordPtr += 2; numPoints > 0;
- numPoints--, coordPtr += 2) {
- sprintf(buffer, "%.15g %.15g lineton", coordPtr[0],
- Tk_PostscriptY(coordPtr[1], psInfo));
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- }
- }
- /*
- *--------------------------------------------------------------
- *
- * 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(interp, string, doublePtr)
- 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) {
- error:
- Tcl_AppendResult(interp, "bad distance "", string,
- """, (char *) NULL);
- return TCL_ERROR;
- }
- while ((*end != ' ') && 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 != ' ') && isspace(UCHAR(*end))) {
- end++;
- }
- if (*end != 0) {
- goto error;
- }
- *doublePtr = d;
- return TCL_OK;
- }
- /*
- *--------------------------------------------------------------
- *
- * TkImageGetColor --
- *
- * This procedure 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
- #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
- #if defined(WIN32) || defined(MAC_OSX_TK)
- static void
- TkImageGetColor(cdata, pixel, red, green, blue)
- TkColormapData *cdata; /* Colormap data */
- unsigned long pixel; /* Pixel value to look up */
- double *red, *green, *blue; /* Color data to return */
- {
- *red = (double) GetRValue(pixel) / 255.0;
- *green = (double) GetGValue(pixel) / 255.0;
- *blue = (double) GetBValue(pixel) / 255.0;
- }
- #else
- static void
- TkImageGetColor(cdata, pixel, red, green, blue)
- TkColormapData *cdata; /* Colormap data */
- unsigned long pixel; /* Pixel value to look up */
- double *red, *green, *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
- /*
- *--------------------------------------------------------------
- *
- * TkPostscriptImage --
- *
- * This procedure 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(interp, tkwin, psInfo, ximage, x, y, width, height)
- Tcl_Interp *interp;
- Tk_Window tkwin;
- Tk_PostscriptInfo psInfo; /* postscript info */
- XImage *ximage; /* Image to draw */
- int x, y; /* First pixel to output */
- int width, height; /* Width and height of area */
- {
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
- char buffer[256];
- 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;
- 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 = (XColor *) 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;
- case 2: bytesPerLine = 3 * width; maxWidth = 20000; break;
- }
- if (bytesPerLine > 60000) {
- Tcl_ResetResult(interp);
- sprintf(buffer,
- "Can't generate Postscript for images more than %d pixels wide",
- maxWidth);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- ckfree((char *) cdata.colors);
- return TCL_ERROR;
- }
- maxRows = 60000 / bytesPerLine;
- for (band = height-1; band >= 0; band -= maxRows) {
- int rows = (band >= maxRows) ? maxRows : band + 1;
- int lineLen = 0;
- switch (level) {
- case 0:
- sprintf(buffer, "%d %d 1 matrix {n<", width, rows);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- break;
- case 1:
- sprintf(buffer, "%d %d 8 matrix {n<", width, rows);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- break;
- case 2:
- sprintf(buffer, "%d %d 8 matrix {n<",
- width, rows);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- 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) {
- sprintf(buffer, "%02X", data);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- lineLen += 2;
- if (lineLen > 60) {
- lineLen = 0;
- Tcl_AppendResult(interp, "n", (char *) NULL);
- }
- mask=0x80;
- data=0x00;
- }
- }
- if ((width % 8) != 0) {
- sprintf(buffer, "%02X", data);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- 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);
- sprintf(buffer, "%02X", (int) floor(0.5 + 255.0 *
- (0.30 * red + 0.59 * green + 0.11 * blue)));
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- lineLen += 2;
- if (lineLen > 60) {
- lineLen = 0;
- Tcl_AppendResult(interp, "n", (char *) NULL);
- }
- }
- break;
- }
- case 2: {
- /*
- * 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);
- sprintf(buffer, "%02X%02X%02X",
- (int) floor(0.5 + 255.0 * red),
- (int) floor(0.5 + 255.0 * green),
- (int) floor(0.5 + 255.0 * blue));
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- lineLen += 6;
- if (lineLen > 60) {
- lineLen = 0;
- Tcl_AppendResult(interp, "n", (char *) NULL);
- }
- }
- break;
- }
- }
- }
- switch (level) {
- case 0: sprintf(buffer, ">n} imagen"); break;
- case 1: sprintf(buffer, ">n} imagen"); break;
- case 2: sprintf(buffer, ">n} false 3 colorimagen"); break;
- }
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- sprintf(buffer, "0 %d translaten", rows);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- }
- ckfree((char *) cdata.colors);
- return TCL_OK;
- }
- /*
- *--------------------------------------------------------------
- *
- * Tk_PostscriptPhoto --
- *
- * This procedure 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(interp, blockPtr, psInfo, width, height)
- Tcl_Interp *interp;
- Tk_PhotoImageBlock *blockPtr;
- Tk_PostscriptInfo psInfo;
- int width, height;
- {
- TkPostscriptInfo *psInfoPtr = (TkPostscriptInfo *) psInfo;
- int colorLevel = psInfoPtr->colorLevel;
- static int codeIncluded = 0;
- unsigned char *pixelPtr;
- char buffer[256], cspace[40], decode[40];
- int bpc;
- int xx, yy, lineLen;
- float red, green, blue;
- int alpha;
- int bytesPerLine=0, maxWidth=0;
- unsigned char opaque = 255;
- unsigned char *alphaPtr;
- int alphaOffset, alphaPitch, alphaIncr;
- if (psInfoPtr->prepass) {
- codeIncluded = 0;
- return TCL_OK;
- }
- /*
- * Define the "TkPhoto" function, which is a modified version
- * of the original "transparentimage" function posted
- * by ian@five-d.com (Ian Kemmish) to comp.lang.postscript.
- * For a monochrome colorLevel this is a slightly different
- * version that uses the imagemask command instead of image.
- */
- if( !codeIncluded && (colorLevel != 0) ) {
- /*
- * Color and gray-scale code.
- */
- codeIncluded = !0;
- Tcl_AppendResult( interp,
- "/TkPhoto { n",
- " gsave n",
- " 32 dict begin n",
- " /tinteger exch def n",
- " /transparent 1 string def n",
- " transparent 0 tinteger put n",
- " /olddict exch def n",
- " olddict /DataSource get dup type /filetype ne { n",
- " olddict /DataSource 3 -1 roll n",
- " 0 () /SubFileDecode filter put n",
- " } { n",
- " pop n",
- " } ifelse n",
- " /newdict olddict maxlength dict def n",
- " olddict newdict copy pop n",
- " /w newdict /Width get def n",
- " /crpp newdict /Decode get length 2 idiv def n",
- " /str w string def n",
- " /pix w crpp mul string def n",
- " /substrlen 2 w log 2 log div floor exp cvi def n",
- " /substrs [ n",
- " { n",
- " substrlen string n",
- " 0 1 substrlen 1 sub { n",
- " 1 index exch tinteger put n",
- " } for n",
- " /substrlen substrlen 2 idiv def n",
- " substrlen 0 eq {exit} if n",
- " } loop n",
- " ] def n",
- " /h newdict /Height get def n",
- " 1 w div 1 h div matrix scale n",
- " olddict /ImageMatrix get exch matrix concatmatrix n",
- " matrix invertmatrix concat n",
- " newdict /Height 1 put n",
- " newdict /DataSource pix put n",
- " /mat [w 0 0 h 0 0] def n",
- " newdict /ImageMatrix mat put n",
- " 0 1 h 1 sub { n",
- " mat 5 3 -1 roll neg put n",
- " olddict /DataSource get str readstring pop pop n",
- " /tail str def n",
- " /x 0 def n",
- " olddict /DataSource get pix readstring pop pop n",
- " { n",
- " tail transparent search dup /done exch not def n",
- " {exch pop exch pop} if n",
- " /w1 exch length def n",
- " w1 0 ne { n",
- " newdict /DataSource ",
- " pix x crpp mul w1 crpp mul getinterval put n",
- " newdict /Width w1 put n",
- " mat 4 x neg put n",
- " /x x w1 add def n",
- " newdict image n",
- " /tail tail w1 tail length w1 sub getinterval def n",
- " } if n",
- " done {exit} if n",
- " tail substrs { n",
- " anchorsearch {pop} if n",
- " } forall n",
- " /tail exch def n",
- " tail length 0 eq {exit} if n",
- " /x w tail length sub def n",
- " } loop n",
- " } for n",
- " end n",
- " grestore n",
- "} bind def nnn", (char *) NULL);
- } else if( !codeIncluded && (colorLevel == 0) ) {
- /*
- * Monochrome-only code
- */
- codeIncluded = !0;
- Tcl_AppendResult( interp,
- "/TkPhoto { n",
- " gsave n",
- " 32 dict begin n",
- " /dummyInteger exch def n",
- " /olddict exch def n",
- " olddict /DataSource get dup type /filetype ne { n",
- " olddict /DataSource 3 -1 roll n",
- " 0 () /SubFileDecode filter put n",
- " } { n",
- " pop n",
- " } ifelse n",
- " /newdict olddict maxlength dict def n",
- " olddict newdict copy pop n",
- " /w newdict /Width get def n",
- " /pix w 7 add 8 idiv string def n",
- " /h newdict /Height get def n",
- " 1 w div 1 h div matrix scale n",
- " olddict /ImageMatrix get exch matrix concatmatrix n",
- " matrix invertmatrix concat n",
- " newdict /Height 1 put n",
- " newdict /DataSource pix put n",
- " /mat [w 0 0 h 0 0] def n",
- " newdict /ImageMatrix mat put n",
- " 0 1 h 1 sub { n",
- " mat 5 3 -1 roll neg put n",
- " 0.000 0.000 0.000 setrgbcolor n",
- " olddict /DataSource get pix readstring pop pop n",
- " newdict /DataSource pix put n",
- " newdict imagemask n",
- " 1.000 1.000 1.000 setrgbcolor n",
- " olddict /DataSource get pix readstring pop pop n",
- " newdict /DataSource pix put n",
- " newdict imagemask n",
- " } for n",
- " end n",
- " grestore n",
- "} bind def nnn", (char *) NULL);
- }
- /*
- * 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;
- case 2: bytesPerLine = 3 * width; maxWidth = 20000; break;
- }
- if (bytesPerLine > 60000) {
- Tcl_ResetResult(interp);
- sprintf(buffer,
- "Can't generate Postscript for images more than %d pixels wide",
- maxWidth);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- return TCL_ERROR;
- }
- /*
- * Set up the postscript code except for the image-data stream.
- */
- switch (colorLevel) {
- case 0:
- strcpy( cspace, "/DeviceGray");
- strcpy( decode, "[1 0]");
- bpc = 1;
- break;
- case 1:
- strcpy( cspace, "/DeviceGray");
- strcpy( decode, "[0 1]");
- bpc = 8;
- break;
- default:
- strcpy( cspace, "/DeviceRGB");
- strcpy( decode, "[0 1 0 1 0 1]");
- bpc = 8;
- break;
- }
- Tcl_AppendResult(interp,
- cspace, " setcolorspacenn", (char *) NULL);
- sprintf(buffer,
- " /Width %dn /Height %dn /BitsPerComponent %dn",
- width, height, bpc);
- Tcl_AppendResult(interp,
- "<<n /ImageType 1n", buffer,
- " /DataSource currentfile",
- " /ASCIIHexDecode filtern", (char *) NULL);
- sprintf(buffer,
- " /ImageMatrix [1 0 0 -1 0 %d]n", height);
- Tcl_AppendResult(interp, buffer,
- " /Decode ", decode, "n>>n1 TkPhoton", (char *) NULL);
- /*
- * 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) {
- sprintf(buffer, "%02X", data);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- lineLen += 2;
- if (lineLen >= 60) {
- lineLen = 0;
- Tcl_AppendResult(interp, "n", (char *) NULL);
- }
- mask=0x80;
- data=0x00;
- }
- }
- if ((width % 8) != 0) {
- sprintf(buffer, "%02X", data);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- 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) {
- sprintf(buffer, "%02X", data);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- lineLen += 2;
- if (lineLen >= 60) {
- lineLen = 0;
- Tcl_AppendResult(interp, "n", (char *) NULL);
- }
- mask=0x80;
- data=0x00;
- }
- }
- if ((width % 8) != 0) {
- sprintf(buffer, "%02X", data);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- 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);
- sprintf(buffer, "%02X", alpha | 0x01);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- lineLen += 2;
- if (lineLen >= 60) {
- lineLen = 0;
- Tcl_AppendResult(interp, "n", (char *) NULL);
- }
- }
- /*
- * 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]];
- sprintf(buffer, "%02X", (int) floor(0.5 +
- ( 0.3086 * red + 0.6094 * green + 0.0820 * blue)));
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- lineLen += 2;
- if (lineLen >= 60) {
- lineLen = 0;
- Tcl_AppendResult(interp, "n", (char *) NULL);
- }
- }
- 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);
- sprintf(buffer, "%02X", alpha | 0x01);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- lineLen += 2;
- if (lineLen >= 60) {
- lineLen = 0;
- Tcl_AppendResult(interp, "n", (char *) NULL);
- }
- }
- /*
- * 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);
- sprintf(buffer, "%02X%02X%02X",
- pixelPtr[blockPtr->offset[0]],
- pixelPtr[blockPtr->offset[1]],
- pixelPtr[blockPtr->offset[2]]);
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- lineLen += 6;
- if (lineLen >= 60) {
- lineLen = 0;
- Tcl_AppendResult(interp, "n", (char *) NULL);
- }
- }
- break;
- }
- }
- }
- Tcl_AppendResult(interp, ">n", (char *) NULL);
- return TCL_OK;
- }