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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) 1994-1995 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- */
-
- static char sccsid[] = "@(#) tkCanvPs.c 1.35 95/06/19 10:04:58";
-
- #include <stdio.h>
- #include "tkInt.h"
- #include "tkCanvas.h"
- #include "tkPort.h"
-
- /*
- * See tkCanvas.h for key data structures used to implement canvases.
- */
-
- /*
- * 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. */
- FILE *f; /* Open file 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. */
- } 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, "-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, "-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. */
- char **argv; /* Argument strings. Caller has
- * already parsed this command enough
- * to know that argv[1] is
- * "postscript". */
- {
- TkPostscriptInfo psInfo, *oldInfoPtr;
- int result = TCL_ERROR;
- Tk_Item *itemPtr;
- #define STRING_LENGTH 400
- char string[STRING_LENGTH+1], *p;
- time_t now;
- struct passwd *pwPtr;
- FILE *f;
- size_t length;
- 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 *libDir;
-
- /*
- *----------------------------------------------------------------
- * Initialize the data structure describing Postscript generation,
- * then process all the arguments to fill the data structure in.
- *----------------------------------------------------------------
- */
-
- oldInfoPtr = canvasPtr->psInfoPtr;
- canvasPtr->psInfoPtr = &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.f = NULL;
- psInfo.prepass = 0;
- Tcl_InitHashTable(&psInfo.fontTable, TCL_STRING_KEYS);
- result = Tk_ConfigureWidget(canvasPtr->interp, canvasPtr->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(canvasPtr->tkwin);
- }
- if (psInfo.height == -1) {
- psInfo.height = Tk_Height(canvasPtr->tkwin);
- }
- psInfo.x2 = psInfo.x + psInfo.width;
- psInfo.y2 = psInfo.y + psInfo.height;
-
- if (psInfo.pageXString != NULL) {
- if (GetPostscriptPoints(canvasPtr->interp, psInfo.pageXString,
- &psInfo.pageX) != TCL_OK) {
- goto cleanup;
- }
- }
- if (psInfo.pageYString != NULL) {
- if (GetPostscriptPoints(canvasPtr->interp, psInfo.pageYString,
- &psInfo.pageY) != TCL_OK) {
- goto cleanup;
- }
- }
- if (psInfo.pageWidthString != NULL) {
- if (GetPostscriptPoints(canvasPtr->interp, psInfo.pageWidthString,
- &psInfo.scale) != TCL_OK) {
- goto cleanup;
- }
- psInfo.scale /= psInfo.width;
- } else if (psInfo.pageHeightString != NULL) {
- if (GetPostscriptPoints(canvasPtr->interp, psInfo.pageHeightString,
- &psInfo.scale) != TCL_OK) {
- goto cleanup;
- }
- psInfo.scale /= psInfo.height;
- } else {
- psInfo.scale = (72.0/25.4)*WidthMMOfScreen(Tk_Screen(canvasPtr->tkwin));
- psInfo.scale /= WidthOfScreen(Tk_Screen(canvasPtr->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(canvasPtr->interp, "bad color mode \"",
- psInfo.colorMode, "\": must be monochrome, ",
- "gray, or color", (char *) NULL);
- goto cleanup;
- }
- }
-
- if (psInfo.fileName != NULL) {
- p = Tcl_TildeSubst(canvasPtr->interp, psInfo.fileName, &buffer);
- if (p == NULL) {
- goto cleanup;
- }
- psInfo.f = fopen(p, "w");
- Tcl_DStringFree(&buffer);
- if (psInfo.f == NULL) {
- Tcl_AppendResult(canvasPtr->interp, "couldn't write file \"",
- psInfo.fileName, "\": ",
- Tcl_PosixError(canvasPtr->interp), (char *) NULL);
- 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)(canvasPtr->interp,
- (Tk_Canvas) canvasPtr, itemPtr, 1);
- Tcl_ResetResult(canvasPtr->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.
- *--------------------------------------------------------
- */
-
- Tcl_AppendResult(canvasPtr->interp, "%!PS-Adobe-3.0 EPSF-3.0\n",
- "%%Creator: Tk Canvas Widget\n", (char *) NULL);
- pwPtr = getpwuid(getuid());
- Tcl_AppendResult(canvasPtr->interp, "%%For: ",
- (pwPtr != NULL) ? pwPtr->pw_gecos : "Unknown", "\n",
- (char *) NULL);
- endpwent();
- Tcl_AppendResult(canvasPtr->interp, "%%Title: Window ",
- Tk_PathName(canvasPtr->tkwin), "\n", (char *) NULL);
- time(&now);
- Tcl_AppendResult(canvasPtr->interp, "%%CreationDate: ",
- ctime(&now), (char *) NULL);
- 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(canvasPtr->interp, "%%BoundingBox: ", string,
- "\n", (char *) NULL);
- Tcl_AppendResult(canvasPtr->interp, "%%Pages: 1\n",
- "%%DocumentData: Clean7Bit\n", (char *) NULL);
- Tcl_AppendResult(canvasPtr->interp, "%%Orientation: ",
- psInfo.rotate ? "Landscape\n" : "Portrait\n", (char *) NULL);
- p = "%%DocumentNeededResources: font ";
- for (hPtr = Tcl_FirstHashEntry(&psInfo.fontTable, &search);
- hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
- Tcl_AppendResult(canvasPtr->interp, p,
- Tcl_GetHashKey(&psInfo.fontTable, hPtr),
- "\n", (char *) NULL);
- p = "%%+ font ";
- }
- Tcl_AppendResult(canvasPtr->interp, "%%EndComments\n\n", (char *) NULL);
-
- /*
- * Read a standard prolog file from disk and insert it into
- * the Postscript.
- */
-
- libDir = Tcl_GetVar(canvasPtr->interp, "tk_library", TCL_GLOBAL_ONLY);
- if (libDir == NULL) {
- Tcl_ResetResult(canvasPtr->interp);
- Tcl_AppendResult(canvasPtr->interp, "couldn't find library directory: ",
- "tk_library variable doesn't exist", (char *) NULL);
- goto cleanup;
- }
- sprintf(string, "%.350s/prolog.ps", libDir);
- f = fopen(string, "r");
- if (f == NULL) {
- Tcl_ResetResult(canvasPtr->interp);
- Tcl_AppendResult(canvasPtr->interp, "couldn't open prolog file \"",
- string, "\": ", Tcl_PosixError(canvasPtr->interp),
- (char *) NULL);
- goto cleanup;
- }
- while (fgets(string, STRING_LENGTH, f) != NULL) {
- Tcl_AppendResult(canvasPtr->interp, string, (char *) NULL);
- }
- if (ferror(f)) {
- fclose(f);
- Tcl_ResetResult(canvasPtr->interp);
- Tcl_AppendResult(canvasPtr->interp, "error reading prolog file \"",
- string, "\": ",
- Tcl_PosixError(canvasPtr->interp), (char *) NULL);
- goto cleanup;
- }
- fclose(f);
- if (psInfo.f != NULL) {
- fputs(canvasPtr->interp->result, psInfo.f);
- Tcl_ResetResult(canvasPtr->interp);
- }
-
- /*
- *-----------------------------------------------------------
- * Document setup: set the color level and include fonts.
- *-----------------------------------------------------------
- */
-
- sprintf(string, "/CL %d def\n", psInfo.colorLevel);
- Tcl_AppendResult(canvasPtr->interp, "%%BeginSetup\n", string,
- (char *) NULL);
- for (hPtr = Tcl_FirstHashEntry(&psInfo.fontTable, &search);
- hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
- Tcl_AppendResult(canvasPtr->interp, "%%IncludeResource: font ",
- Tcl_GetHashKey(&psInfo.fontTable, hPtr), "\n", (char *) NULL);
- }
- Tcl_AppendResult(canvasPtr->interp, "%%EndSetup\n\n", (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(canvasPtr->interp, "%%Page: 1 1\n", "save\n",
- (char *) NULL);
- sprintf(string, "%.1f %.1f translate\n", psInfo.pageX, psInfo.pageY);
- Tcl_AppendResult(canvasPtr->interp, string, (char *) NULL);
- if (psInfo.rotate) {
- Tcl_AppendResult(canvasPtr->interp, "90 rotate\n", (char *) NULL);
- }
- sprintf(string, "%.4g %.4g scale\n", psInfo.scale, psInfo.scale);
- Tcl_AppendResult(canvasPtr->interp, string, (char *) NULL);
- sprintf(string, "%d %d translate\n", deltaX - psInfo.x, deltaY);
- Tcl_AppendResult(canvasPtr->interp, string, (char *) NULL);
- sprintf(string, "%d %.15g moveto %d %.15g lineto %d %.15g lineto %d %.15g",
- psInfo.x, Tk_CanvasPsY((Tk_Canvas) canvasPtr, (double) psInfo.y),
- psInfo.x2, Tk_CanvasPsY((Tk_Canvas) canvasPtr, (double) psInfo.y),
- psInfo.x2, Tk_CanvasPsY((Tk_Canvas) canvasPtr, (double) psInfo.y2),
- psInfo.x, Tk_CanvasPsY((Tk_Canvas) canvasPtr, (double) psInfo.y2));
- Tcl_AppendResult(canvasPtr->interp, string,
- " lineto closepath clip newpath\n", (char *) NULL);
- if (psInfo.f != NULL) {
- fputs(canvasPtr->interp->result, psInfo.f);
- 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;
- }
- Tcl_AppendResult(canvasPtr->interp, "gsave\n", (char *) NULL);
- result = (*itemPtr->typePtr->postscriptProc)(canvasPtr->interp,
- (Tk_Canvas) canvasPtr, itemPtr, 0);
- if (result != TCL_OK) {
- char msg[100];
-
- sprintf(msg, "\n (generating Postscript for item %d)",
- itemPtr->id);
- Tcl_AddErrorInfo(canvasPtr->interp, msg);
- goto cleanup;
- }
- Tcl_AppendResult(canvasPtr->interp, "grestore\n", (char *) NULL);
- if (psInfo.f != NULL) {
- fputs(canvasPtr->interp->result, psInfo.f);
- Tcl_ResetResult(canvasPtr->interp);
- }
- }
-
- /*
- *---------------------------------------------------------------------
- * Output page-end information, such as commands to print the page
- * and document trailer stuff.
- *---------------------------------------------------------------------
- */
-
- Tcl_AppendResult(canvasPtr->interp, "restore showpage\n\n",
- "%%Trailer\nend\n%%EOF\n", (char *) NULL);
- if (psInfo.f != NULL) {
- fputs(canvasPtr->interp->result, psInfo.f);
- 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.f != NULL) {
- fclose(psInfo.f);
- }
- Tcl_DeleteHashTable(&psInfo.fontTable);
- canvasPtr->psInfoPtr = oldInfoPtr;
- return result;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_CanvasPsColor --
- *
- * 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 interp->result.
- * If no error occurs, then additional Postscript will be
- * appended to interp->result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
- int
- Tk_CanvasPsColor(interp, canvas, colorPtr)
- Tcl_Interp *interp; /* Interpreter for returning Postscript
- * or error message. */
- Tk_Canvas canvas; /* Information about canvas. */
- XColor *colorPtr; /* Information about color. */
- {
- TkCanvas *canvasPtr = (TkCanvas *) canvas;
- TkPostscriptInfo *psInfoPtr = canvasPtr->psInfoPtr;
- 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) {
- 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 AdjustColor\n",
- red, green, blue);
- Tcl_AppendResult(interp, string, (char *) NULL);
- return TCL_OK;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_CanvasPsFont --
- *
- * 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 interp->result.
- * If no error occurs, then additional Postscript will be
- * appended to the interp->result.
- *
- * Side effects:
- * The Postscript font name is entered into psInfoPtr->fontTable
- * if it wasn't already there.
- *
- *--------------------------------------------------------------
- */
-
- int
- Tk_CanvasPsFont(interp, canvas, fontStructPtr)
- Tcl_Interp *interp; /* Interpreter for returning Postscript
- * or error message. */
- Tk_Canvas canvas; /* Information about canvas. */
- XFontStruct *fontStructPtr; /* Information about font in which text
- * is to be printed. */
- {
- TkCanvas *canvasPtr = (TkCanvas *) canvas;
- TkPostscriptInfo *psInfoPtr = canvasPtr->psInfoPtr;
- char *name, *end, *weightString, *slantString;
- #define TOTAL_FIELDS 8
- #define FAMILY_FIELD 1
- #define WEIGHT_FIELD 2
- #define SLANT_FIELD 3
- #define SIZE_FIELD 7
- char *fieldPtrs[TOTAL_FIELDS];
- #define MAX_NAME_SIZE 100
- char fontName[MAX_NAME_SIZE+50], pointString[20];
- int i, c, weightSize, nameSize, points;
- char *p;
-
- name = Tk_NameOfFontStruct(fontStructPtr);
-
- /*
- * 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) {
- char *list, **argv;
- int argc;
- double size;
-
- 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;
- }
- sprintf(pointString, "%.15g", size);
- Tcl_AppendResult(interp, "/", argv[0], " findfont ",
- pointString, " scalefont setfont\n", (char *) NULL);
- Tcl_CreateHashEntry(&psInfoPtr->fontTable, argv[0], &i);
- ckfree((char *) argv);
- return TCL_OK;
- }
- }
-
- /*
- * Not in the font map. Try to parse the name to get four fields:
- * family name, weight, slant, and point size. To do this, split the
- * font name up into fields, storing pointers to the first character
- * of each field in fieldPtrs.
- */
-
- if (name[0] != '-') {
- goto error;
- }
- for (p = name+1, i = 0; i < TOTAL_FIELDS; i++) {
- fieldPtrs[i] = p;
- while (*p != '-') {
- if (*p == 0) {
- goto error;
- }
- p++;
- }
- p++;
- }
-
- /*
- * Use the information from the X font name to make a guess at a
- * Postscript font name of the form "<family>-<weight><slant>" where
- * <weight> and <slant> may be omitted and if both are omitted then
- * the dash is also omitted. Postscript is very picky about font names,
- * so there are several heuristics in the code below (e.g. don't
- * include a "Roman" slant except for "Times" font, and make sure
- * that the first letter of each field is capitalized but no other
- * letters are in caps).
- */
-
- nameSize = fieldPtrs[FAMILY_FIELD+1] - 1 - fieldPtrs[FAMILY_FIELD];
- if ((nameSize == 0) || (nameSize > MAX_NAME_SIZE)) {
- goto error;
- }
- strncpy(fontName, fieldPtrs[FAMILY_FIELD], (size_t) nameSize);
- if (islower(UCHAR(fontName[0]))) {
- fontName[0] = toupper(fontName[0]);
- }
- for (p = fontName+1, i = nameSize-1; i > 0; p++, i--) {
- if (isupper(UCHAR(*p))) {
- *p = tolower(*p);
- }
- }
- *p = 0;
- weightSize = fieldPtrs[WEIGHT_FIELD+1] - 1 - fieldPtrs[WEIGHT_FIELD];
- if (weightSize == 0) {
- goto error;
- }
- if (strncasecmp(fieldPtrs[WEIGHT_FIELD], "medium",
- (size_t) weightSize) == 0) {
- weightString = "";
- } else if (strncasecmp(fieldPtrs[WEIGHT_FIELD], "bold",
- (size_t) weightSize) == 0) {
- weightString = "Bold";
- } else {
- goto error;
- }
- if (fieldPtrs[SLANT_FIELD+1] != (fieldPtrs[SLANT_FIELD] + 2)) {
- goto error;
- }
- c = fieldPtrs[SLANT_FIELD][0];
- if ((c == 'r') || (c == 'R')) {
- slantString = "";
- if ((weightString[0] == 0) && (nameSize == 5)
- && (strncmp(fontName, "Times", 5) == 0)) {
- slantString = "Roman";
- }
- } else if ((c == 'i') || (c == 'I')) {
- slantString = "Italic";
- } else if ((c == 'o') || (c == 'O')) {
- slantString = "Oblique";
- } else {
- goto error;
- }
- if ((weightString[0] != 0) || (slantString[0] != 0)) {
- sprintf(p, "-%s%s", weightString, slantString);
- }
- points = strtoul(fieldPtrs[SIZE_FIELD], &end, 0);
- if (points == 0) {
- goto error;
- }
- sprintf(pointString, "%.15g", ((double) points)/10.0);
- Tcl_AppendResult(interp, "/", fontName, " findfont ",
- pointString, " scalefont setfont\n", (char *) NULL);
- Tcl_CreateHashEntry(&psInfoPtr->fontTable, fontName, &i);
- return TCL_OK;
-
- error:
- Tcl_ResetResult(interp);
- Tcl_AppendResult(interp, "couldn't translate font name \"",
- name, "\" to Postscript", (char *) NULL);
- return TCL_ERROR;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_CanvasPsBitmap --
- *
- * 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 interp->result.
- * If no error occurs, then additional Postscript will be
- * appended to interp->result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
- int
- Tk_CanvasPsBitmap(interp, canvas, bitmap, startX, startY, width, height)
- Tcl_Interp *interp; /* Interpreter for returning Postscript
- * or error message. */
- Tk_Canvas canvas; /* Information about canvas. */
- 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. */
- {
- TkCanvas *canvasPtr = (TkCanvas *) canvas;
- TkPostscriptInfo *psInfoPtr = canvasPtr->psInfoPtr;
- 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(Tk_CanvasTkwin(canvas)), bitmap, &dummyRoot,
- &dummyX, &dummyY, (unsigned int *) &totalWidth,
- (unsigned int *) &totalHeight, &dummyBorderwidth, &dummyDepth);
- imagePtr = XGetImage(Tk_Display(canvasPtr->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_CanvasPsStipple --
- *
- * 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 interp->result.
- * If no error occurs, then additional Postscript will be
- * appended to interp->result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
- int
- Tk_CanvasPsStipple(interp, canvas, bitmap)
- Tcl_Interp *interp; /* Interpreter for returning Postscript
- * or error message. */
- Tk_Canvas canvas; /* Information about canvas. */
- Pixmap bitmap; /* Bitmap to use for stippling. */
- {
- TkCanvas *canvasPtr = (TkCanvas *) canvas;
- TkPostscriptInfo *psInfoPtr = canvasPtr->psInfoPtr;
- int width, height;
- 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(Tk_CanvasTkwin(canvas)), bitmap, &dummyRoot,
- &dummyX, &dummyY, (unsigned *) &width, (unsigned *) &height,
- &dummyBorderwidth, &dummyDepth);
- sprintf(string, "%d %d ", width, height);
- Tcl_AppendResult(interp, string, (char *) NULL);
- if (Tk_CanvasPsBitmap(interp, (Tk_Canvas) canvasPtr, bitmap, 0, 0,
- width, height) != TCL_OK) {
- return TCL_ERROR;
- }
- Tcl_AppendResult(interp, " StippleFill\n", (char *) NULL);
- return TCL_OK;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_CanvasPsY --
- *
- * Given a y-coordinate in canvas 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_CanvasPsY(canvas, y)
- Tk_Canvas canvas; /* Token for canvas on whose behalf
- * Postscript is being generated. */
- double y; /* Y-coordinate in canvas coords. */
- {
- TkPostscriptInfo *psInfoPtr = ((TkCanvas *) canvas)->psInfoPtr;
-
- return psInfoPtr->y2 - y;
- }
-
- /*
- *--------------------------------------------------------------
- *
- * Tk_CanvasPsPath --
- *
- * Given an array of points for a path, generate Postscript
- * commands to create the path.
- *
- * Results:
- * Postscript commands get appended to what's in interp->result.
- *
- * Side effects:
- * None.
- *
- *--------------------------------------------------------------
- */
-
- void
- Tk_CanvasPsPath(interp, canvas, coordPtr, numPoints)
- Tcl_Interp *interp; /* Put generated Postscript in this
- * interpreter's result field. */
- Tk_Canvas canvas; /* 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 = ((TkCanvas *) canvas)->psInfoPtr;
- char buffer[200];
-
- if (psInfoPtr->prepass) {
- return;
- }
- sprintf(buffer, "%.15g %.15g moveto\n", coordPtr[0],
- Tk_CanvasPsY(canvas, coordPtr[1]));
- Tcl_AppendResult(interp, buffer, (char *) NULL);
- for (numPoints--, coordPtr += 2; numPoints > 0;
- numPoints--, coordPtr += 2) {
- sprintf(buffer, "%.15g %.15g lineto\n", coordPtr[0],
- Tk_CanvasPsY(canvas, coordPtr[1]));
- 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
- * interp->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 != '\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;
- }
-