[1848b52] | 1 | |
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| 2 | /* Copyright (c) Mark J. Kilgard, 1997. */ |
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| 3 | |
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| 4 | /* This program is freely distributable without licensing fees and is |
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| 5 | provided without guarantee or warrantee expressed or implied. This |
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| 6 | program is -not- in the public domain. */ |
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| 7 | |
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| 8 | /* X compile line: cc -o gentexfont gentexfont.c -lX11 */ |
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| 9 | |
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| 10 | #include <assert.h> |
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| 11 | #include <stdlib.h> |
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| 12 | #include <stdio.h> |
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| 13 | #include <string.h> |
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| 14 | #include <unistd.h> |
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| 15 | #include <X11/Xlib.h> |
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| 16 | #include <X11/Xutil.h> |
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| 17 | #include <math.h> |
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| 18 | |
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| 19 | #include "TexFont.h" |
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| 20 | |
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| 21 | typedef struct { |
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| 22 | short width; |
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| 23 | short height; |
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| 24 | short xoffset; |
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| 25 | short yoffset; |
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| 26 | short advance; |
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| 27 | unsigned char *bitmap; |
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| 28 | } PerGlyphInfo, *PerGlyphInfoPtr; |
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| 29 | |
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| 30 | typedef struct { |
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| 31 | int min_char; |
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| 32 | int max_char; |
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| 33 | int max_ascent; |
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| 34 | int max_descent; |
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| 35 | PerGlyphInfo glyph[1]; |
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| 36 | } FontInfo, *FontInfoPtr; |
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| 37 | |
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| 38 | Display *dpy; |
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| 39 | FontInfoPtr fontinfo; |
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| 40 | int format = TXF_FORMAT_BITMAP; |
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| 41 | int gap = 1; |
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| 42 | |
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| 43 | /* #define REPORT_GLYPHS */ |
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| 44 | #ifdef REPORT_GLYPHS |
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| 45 | #define DEBUG_GLYPH4(msg,a,b,c,d) printf(msg,a,b,c,d) |
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| 46 | #define DEBUG_GLYPH(msg) printf(msg) |
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| 47 | #else |
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| 48 | #define DEBUG_GLYPH4(msg,a,b,c,d) { /* nothing */ } |
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| 49 | #define DEBUG_GLYPH(msg) { /* nothing */ } |
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| 50 | #endif |
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| 51 | |
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| 52 | #define MAX_GLYPHS_PER_GRAB 512 /* this is big enough for 2^9 glyph |
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| 53 | character sets */ |
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| 54 | |
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| 55 | FontInfoPtr |
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| 56 | SuckGlyphsFromServer(Display * dpy, Font font) |
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| 57 | { |
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| 58 | Pixmap offscreen; |
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| 59 | XFontStruct *fontinfo; |
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| 60 | XImage *image; |
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| 61 | GC xgc; |
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| 62 | XGCValues values; |
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| 63 | int numchars; |
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| 64 | int width, height, pixwidth; |
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| 65 | int i, j; |
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| 66 | XCharStruct *charinfo; |
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| 67 | XChar2b character; |
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| 68 | unsigned char *bitmapData; |
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| 69 | int x, y; |
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| 70 | int spanLength; |
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| 71 | int charWidth, charHeight, maxSpanLength; |
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| 72 | int grabList[MAX_GLYPHS_PER_GRAB]; |
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| 73 | int glyphsPerGrab = MAX_GLYPHS_PER_GRAB; |
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| 74 | int numToGrab, thisglyph; |
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| 75 | FontInfoPtr myfontinfo; |
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| 76 | |
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| 77 | fontinfo = XQueryFont(dpy, font); |
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| 78 | if (!fontinfo) |
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| 79 | return NULL; |
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| 80 | |
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| 81 | numchars = fontinfo->max_char_or_byte2 - fontinfo->min_char_or_byte2 + 1; |
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| 82 | if (numchars < 1) |
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| 83 | return NULL; |
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| 84 | |
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| 85 | myfontinfo = (FontInfoPtr) malloc(sizeof(FontInfo) + (numchars - 1) * sizeof(PerGlyphInfo)); |
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| 86 | if (!myfontinfo) |
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| 87 | return NULL; |
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| 88 | |
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| 89 | myfontinfo->min_char = fontinfo->min_char_or_byte2; |
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| 90 | myfontinfo->max_char = fontinfo->max_char_or_byte2; |
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| 91 | myfontinfo->max_ascent = fontinfo->max_bounds.ascent; |
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| 92 | myfontinfo->max_descent = fontinfo->max_bounds.descent; |
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| 93 | |
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| 94 | width = fontinfo->max_bounds.rbearing - fontinfo->min_bounds.lbearing; |
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| 95 | height = fontinfo->max_bounds.ascent + fontinfo->max_bounds.descent; |
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| 96 | |
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| 97 | maxSpanLength = (width + 7) / 8; |
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| 98 | /* Be careful determining the width of the pixmap; the X protocol allows |
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| 99 | pixmaps of width 2^16-1 (unsigned short size) but drawing coordinates |
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| 100 | max out at 2^15-1 (signed short size). If the width is too large, we |
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| 101 | need to limit the glyphs per grab. */ |
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| 102 | if ((glyphsPerGrab * 8 * maxSpanLength) >= (1 << 15)) { |
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| 103 | glyphsPerGrab = (1 << 15) / (8 * maxSpanLength); |
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| 104 | } |
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| 105 | pixwidth = glyphsPerGrab * 8 * maxSpanLength; |
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| 106 | offscreen = XCreatePixmap(dpy, RootWindow(dpy, DefaultScreen(dpy)), |
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| 107 | pixwidth, height, 1); |
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| 108 | |
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| 109 | values.font = font; |
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| 110 | values.background = 0; |
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| 111 | values.foreground = 0; |
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| 112 | xgc = XCreateGC(dpy, offscreen, GCFont | GCBackground | GCForeground, &values); |
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| 113 | |
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| 114 | XFillRectangle(dpy, offscreen, xgc, 0, 0, 8 * maxSpanLength * glyphsPerGrab, height); |
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| 115 | XSetForeground(dpy, xgc, 1); |
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| 116 | |
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| 117 | numToGrab = 0; |
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| 118 | if (fontinfo->per_char == NULL) { |
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| 119 | charinfo = &(fontinfo->min_bounds); |
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| 120 | charWidth = charinfo->rbearing - charinfo->lbearing; |
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| 121 | charHeight = charinfo->ascent + charinfo->descent; |
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| 122 | spanLength = (charWidth + 7) / 8; |
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| 123 | } |
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| 124 | for (i = 0; i < numchars; i++) { |
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| 125 | if (fontinfo->per_char != NULL) { |
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| 126 | charinfo = &(fontinfo->per_char[i]); |
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| 127 | charWidth = charinfo->rbearing - charinfo->lbearing; |
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| 128 | charHeight = charinfo->ascent + charinfo->descent; |
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| 129 | if (charWidth == 0 || charHeight == 0) { |
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| 130 | /* Still must move raster pos even if empty character */ |
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| 131 | myfontinfo->glyph[i].width = 0; |
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| 132 | myfontinfo->glyph[i].height = 0; |
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| 133 | myfontinfo->glyph[i].xoffset = 0; |
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| 134 | myfontinfo->glyph[i].yoffset = 0; |
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| 135 | myfontinfo->glyph[i].advance = charinfo->width; |
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| 136 | myfontinfo->glyph[i].bitmap = NULL; |
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| 137 | goto PossiblyDoGrab; |
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| 138 | } |
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| 139 | } |
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| 140 | grabList[numToGrab] = i; |
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| 141 | |
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| 142 | /* XXX is this right for large fonts? */ |
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| 143 | character.byte2 = (i + fontinfo->min_char_or_byte2) & 255; |
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| 144 | character.byte1 = (i + fontinfo->min_char_or_byte2) >> 8; |
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| 145 | |
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| 146 | /* XXX we could use XDrawImageString16 which would also paint the backing |
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| 147 | |
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| 148 | rectangle but X server bugs in some scalable font rasterizers makes it |
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| 149 | |
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| 150 | more effective to do XFillRectangles to clear the pixmap and |
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| 151 | XDrawImage16 for the text. */ |
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| 152 | XDrawString16(dpy, offscreen, xgc, |
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| 153 | -charinfo->lbearing + 8 * maxSpanLength * numToGrab, |
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| 154 | charinfo->ascent, &character, 1); |
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| 155 | |
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| 156 | numToGrab++; |
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| 157 | |
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| 158 | PossiblyDoGrab: |
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| 159 | |
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| 160 | if (numToGrab >= glyphsPerGrab || i == numchars - 1) { |
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| 161 | image = XGetImage(dpy, offscreen, |
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| 162 | 0, 0, pixwidth, height, 1, XYPixmap); |
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| 163 | for (j = 0; j < numToGrab; j++) { |
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| 164 | thisglyph = grabList[j]; |
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| 165 | if (fontinfo->per_char != NULL) { |
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| 166 | charinfo = &(fontinfo->per_char[thisglyph]); |
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| 167 | charWidth = charinfo->rbearing - charinfo->lbearing; |
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| 168 | charHeight = charinfo->ascent + charinfo->descent; |
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| 169 | spanLength = (charWidth + 7) / 8; |
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| 170 | } |
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| 171 | bitmapData = calloc(height * spanLength, sizeof(char)); |
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| 172 | if (!bitmapData) |
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| 173 | goto FreeFontAndReturn; |
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| 174 | DEBUG_GLYPH4("index %d, glyph %d (%d by %d)\n", |
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| 175 | j, thisglyph + fontinfo->min_char_or_byte2, charWidth, charHeight); |
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| 176 | for (y = 0; y < charHeight; y++) { |
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| 177 | for (x = 0; x < charWidth; x++) { |
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| 178 | /* XXX The algorithm used to suck across the font ensures that |
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| 179 | each glyph begins on a byte boundary. In theory this would |
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| 180 | make it convienent to copy the glyph into a byte oriented |
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| 181 | bitmap. We actually use the XGetPixel function to extract |
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| 182 | each pixel from the image which is not that efficient. We |
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| 183 | could either do tighter packing in the pixmap or more |
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| 184 | efficient extraction from the image. Oh well. */ |
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| 185 | if (XGetPixel(image, j * maxSpanLength * 8 + x, charHeight - 1 - y)) { |
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| 186 | DEBUG_GLYPH("x"); |
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| 187 | bitmapData[y * spanLength + x / 8] |= (1 << (x & 7)); |
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| 188 | } else { |
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| 189 | DEBUG_GLYPH(" "); |
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| 190 | } |
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| 191 | } |
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| 192 | DEBUG_GLYPH("\n"); |
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| 193 | } |
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| 194 | myfontinfo->glyph[thisglyph].width = charWidth; |
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| 195 | myfontinfo->glyph[thisglyph].height = charHeight; |
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| 196 | myfontinfo->glyph[thisglyph].xoffset = charinfo->lbearing; |
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| 197 | myfontinfo->glyph[thisglyph].yoffset = -charinfo->descent; |
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| 198 | myfontinfo->glyph[thisglyph].advance = charinfo->width; |
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| 199 | myfontinfo->glyph[thisglyph].bitmap = bitmapData; |
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| 200 | } |
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| 201 | XDestroyImage(image); |
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| 202 | numToGrab = 0; |
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| 203 | /* do we need to clear the offscreen pixmap to get more? */ |
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| 204 | if (i < numchars - 1) { |
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| 205 | XSetForeground(dpy, xgc, 0); |
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| 206 | XFillRectangle(dpy, offscreen, xgc, 0, 0, 8 * maxSpanLength * glyphsPerGrab, height); |
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| 207 | XSetForeground(dpy, xgc, 1); |
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| 208 | } |
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| 209 | } |
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| 210 | } |
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| 211 | XFreeGC(dpy, xgc); |
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| 212 | XFreePixmap(dpy, offscreen); |
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| 213 | return myfontinfo; |
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| 214 | |
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| 215 | FreeFontAndReturn: |
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| 216 | XDestroyImage(image); |
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| 217 | XFreeGC(dpy, xgc); |
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| 218 | XFreePixmap(dpy, offscreen); |
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| 219 | for (j = i - 1; j >= 0; j--) { |
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| 220 | if (myfontinfo->glyph[j].bitmap) |
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| 221 | free(myfontinfo->glyph[j].bitmap); |
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| 222 | } |
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| 223 | free(myfontinfo); |
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| 224 | return NULL; |
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| 225 | } |
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| 226 | |
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| 227 | void |
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| 228 | printGlyph(FontInfoPtr font, int c) |
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| 229 | { |
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| 230 | PerGlyphInfoPtr glyph; |
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| 231 | unsigned char *bitmapData; |
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| 232 | int width, height, spanLength; |
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| 233 | int x, y; |
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| 234 | |
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| 235 | if (c < font->min_char || c > font->max_char) { |
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| 236 | printf("out of range glyph\n"); |
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| 237 | return; |
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| 238 | } |
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| 239 | glyph = &font->glyph[c - font->min_char]; |
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| 240 | bitmapData = glyph->bitmap; |
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| 241 | if (bitmapData) { |
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| 242 | width = glyph->width; |
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| 243 | spanLength = (width + 7) / 8; |
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| 244 | height = glyph->height; |
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| 245 | |
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| 246 | for (y = 0; y < height; y++) { |
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| 247 | for (x = 0; x < width; x++) { |
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| 248 | if (bitmapData[y * spanLength + x / 8] & (1 << (x & 7))) { |
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| 249 | putchar('X'); |
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| 250 | } else { |
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| 251 | putchar('.'); |
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| 252 | } |
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| 253 | } |
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| 254 | putchar('\n'); |
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| 255 | } |
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| 256 | } |
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| 257 | } |
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| 258 | |
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| 259 | void |
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| 260 | getMetric(FontInfoPtr font, int c, TexGlyphInfo * tgi) |
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| 261 | { |
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| 262 | PerGlyphInfoPtr glyph; |
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| 263 | unsigned char *bitmapData; |
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| 264 | |
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| 265 | tgi->c = c; |
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| 266 | if (c < font->min_char || c > font->max_char) { |
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| 267 | tgi->width = 0; |
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| 268 | tgi->height = 0; |
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| 269 | tgi->xoffset = 0; |
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| 270 | tgi->yoffset = 0; |
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| 271 | tgi->dummy = 0; |
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| 272 | tgi->advance = 0; |
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| 273 | return; |
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| 274 | } |
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| 275 | glyph = &font->glyph[c - font->min_char]; |
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| 276 | bitmapData = glyph->bitmap; |
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| 277 | if (bitmapData) { |
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| 278 | tgi->width = glyph->width; |
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| 279 | tgi->height = glyph->height; |
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| 280 | tgi->xoffset = glyph->xoffset; |
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| 281 | tgi->yoffset = glyph->yoffset; |
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| 282 | } else { |
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| 283 | tgi->width = 0; |
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| 284 | tgi->height = 0; |
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| 285 | tgi->xoffset = 0; |
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| 286 | tgi->yoffset = 0; |
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| 287 | } |
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| 288 | tgi->dummy = 0; |
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| 289 | tgi->advance = glyph->advance; |
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| 290 | } |
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| 291 | |
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| 292 | int |
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| 293 | glyphCompare(const void *a, const void *b) |
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| 294 | { |
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| 295 | unsigned char *c1 = (unsigned char *) a; |
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| 296 | unsigned char *c2 = (unsigned char *) b; |
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| 297 | TexGlyphInfo tgi1; |
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| 298 | TexGlyphInfo tgi2; |
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| 299 | |
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| 300 | getMetric(fontinfo, *c1, &tgi1); |
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| 301 | getMetric(fontinfo, *c2, &tgi2); |
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| 302 | return tgi2.height - tgi1.height; |
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| 303 | } |
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| 304 | |
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| 305 | int |
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| 306 | getFontel(unsigned char *bitmapData, int spanLength, int i, int j) |
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| 307 | { |
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| 308 | return bitmapData[i * spanLength + j / 8] & (1 << (j & 7)) ? 255 : 0; |
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| 309 | } |
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| 310 | |
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| 311 | void |
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| 312 | placeGlyph(FontInfoPtr font, int c, unsigned char *texarea, int stride, int x, int y) |
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| 313 | { |
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| 314 | PerGlyphInfoPtr glyph; |
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| 315 | unsigned char *bitmapData; |
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| 316 | int width, height, spanLength; |
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| 317 | int i, j; |
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| 318 | |
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| 319 | if (c < font->min_char || c > font->max_char) { |
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| 320 | printf("out of range glyph\n"); |
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| 321 | return; |
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| 322 | } |
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| 323 | glyph = &font->glyph[c - font->min_char]; |
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| 324 | bitmapData = glyph->bitmap; |
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| 325 | if (bitmapData) { |
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| 326 | width = glyph->width; |
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| 327 | spanLength = (width + 7) / 8; |
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| 328 | height = glyph->height; |
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| 329 | |
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| 330 | for (i = 0; i < height; i++) { |
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| 331 | for (j = 0; j < width; j++) { |
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| 332 | texarea[stride * (y + i) + x + j] = |
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| 333 | getFontel(bitmapData, spanLength, i, j); |
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| 334 | } |
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| 335 | } |
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| 336 | } |
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| 337 | } |
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| 338 | |
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| 339 | char * |
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| 340 | nodupstring(char *s) |
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| 341 | { |
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| 342 | int len, i, p; |
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| 343 | char *new; |
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| 344 | |
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| 345 | len = strlen(s); |
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| 346 | new = (char *) calloc(len + 1, 1); |
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| 347 | p = 0; |
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| 348 | for (i = 0; i < len; i++) { |
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| 349 | if (!strchr(new, s[i])) { |
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| 350 | new[p] = s[i]; |
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| 351 | p++; |
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| 352 | } |
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| 353 | } |
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| 354 | new = realloc(new, p + 1); |
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| 355 | return new; |
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| 356 | } |
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| 357 | |
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| 358 | int |
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| 359 | main(int argc, char *argv[]) |
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| 360 | { |
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| 361 | int texw, texh; |
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| 362 | unsigned char *texarea, *texbitmap; |
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| 363 | FILE *file; |
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| 364 | int len, stride; |
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| 365 | unsigned char *glist; |
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| 366 | int width, height; |
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| 367 | int px, py, maxheight; |
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| 368 | TexGlyphInfo tgi; |
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| 369 | int usageError = 0; |
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| 370 | char *fontname, *filename; |
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| 371 | XFontStruct *xfont; |
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| 372 | int endianness; |
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| 373 | int i, j; |
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| 374 | |
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| 375 | texw = texh = 256; |
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| 376 | glist = " ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890abcdefghijmklmnopqrstuvwxyz?.;,!*:\"/+@#$%^&()"; |
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| 377 | fontname = "-adobe-courier-bold-r-normal--46-*-100-100-m-*-iso8859-1"; |
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| 378 | filename = "default.txf"; |
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| 379 | |
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| 380 | for (i = 1; i < argc; i++) { |
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| 381 | if (!strcmp(argv[i], "-w")) { |
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| 382 | i++; |
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| 383 | texw = atoi(argv[i]); |
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| 384 | } else if (!strcmp(argv[i], "-h")) { |
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| 385 | i++; |
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| 386 | texh = atoi(argv[i]); |
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| 387 | } else if (!strcmp(argv[i], "-gap")) { |
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| 388 | i++; |
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| 389 | gap = atoi(argv[i]); |
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| 390 | } else if (!strcmp(argv[i], "-byte")) { |
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| 391 | format = TXF_FORMAT_BYTE; |
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| 392 | break; |
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| 393 | } else if (!strcmp(argv[i], "-bitmap")) { |
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| 394 | format = TXF_FORMAT_BITMAP; |
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| 395 | } else if (!strcmp(argv[i], "-glist")) { |
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| 396 | i++; |
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| 397 | glist = (unsigned char *) argv[i]; |
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| 398 | } else if (!strcmp(argv[i], "-fn")) { |
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| 399 | i++; |
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| 400 | fontname = argv[i]; |
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| 401 | } else if (!strcmp(argv[i], "-file")) { |
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| 402 | i++; |
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| 403 | filename = argv[i]; |
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| 404 | } else { |
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| 405 | usageError = 1; |
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| 406 | } |
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| 407 | } |
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| 408 | |
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| 409 | if (usageError) { |
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| 410 | putchar('\n'); |
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| 411 | printf("usage: texfontgen [options] txf-file\n"); |
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| 412 | printf(" -w # textureWidth (def=%d)\n", texw); |
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| 413 | printf(" -h # textureHeight (def=%d)\n", texh); |
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| 414 | printf(" -gap # gap between glyphs (def=%d)\n", gap); |
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| 415 | printf(" -bitmap use a bitmap encoding (default)\n"); |
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| 416 | printf(" -byte use a byte encoding (less compact)\n"); |
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| 417 | printf(" -glist ABC glyph list (def=%s)\n", glist); |
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| 418 | printf(" -fn name X font name (def=%s)\n", fontname); |
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| 419 | printf(" -file name output file for textured font (def=%s)\n", fontname); |
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| 420 | putchar('\n'); |
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| 421 | exit(1); |
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| 422 | } |
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| 423 | texarea = calloc(texw * texh, sizeof(unsigned char)); |
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| 424 | glist = (unsigned char *) nodupstring((char *) glist); |
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| 425 | |
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| 426 | dpy = XOpenDisplay(NULL); |
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| 427 | if (!dpy) { |
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| 428 | printf("could not open display\n"); |
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| 429 | exit(1); |
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| 430 | } |
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| 431 | /* find an OpenGL-capable RGB visual with depth buffer */ |
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| 432 | xfont = XLoadQueryFont(dpy, fontname); |
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| 433 | if (!xfont) { |
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| 434 | printf("could not get load X font: %s\n", fontname); |
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| 435 | exit(1); |
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| 436 | } |
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| 437 | fontinfo = SuckGlyphsFromServer(dpy, xfont->fid); |
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| 438 | if (!fontinfo) { |
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| 439 | printf("could not get font glyphs\n"); |
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| 440 | exit(1); |
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| 441 | } |
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| 442 | len = strlen((char *) glist); |
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| 443 | qsort(glist, len, sizeof(unsigned char), glyphCompare); |
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| 444 | |
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| 445 | file = fopen(filename, "wb"); |
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| 446 | fwrite("\377txf", 1, 4, file); |
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| 447 | endianness = 0x12345678; |
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| 448 | assert(sizeof(int) == 4); /* Ensure external file format size. */ |
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| 449 | fwrite(&endianness, sizeof(int), 1, file); |
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| 450 | fwrite(&format, sizeof(int), 1, file); |
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| 451 | fwrite(&texw, sizeof(int), 1, file); |
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| 452 | fwrite(&texh, sizeof(int), 1, file); |
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| 453 | fwrite(&fontinfo->max_ascent, sizeof(int), 1, file); |
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| 454 | fwrite(&fontinfo->max_descent, sizeof(int), 1, file); |
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| 455 | fwrite(&len, sizeof(int), 1, file); |
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| 456 | |
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| 457 | px = gap; |
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| 458 | py = gap; |
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| 459 | maxheight = 0; |
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| 460 | for (i = 0; i < len; i++) { |
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| 461 | if (glist[i] != 0) { /* If not already processed... */ |
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| 462 | |
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| 463 | /* Try to find a character from the glist that will fit on the |
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| 464 | remaining space on the current row. */ |
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| 465 | |
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| 466 | int foundWidthFit = 0; |
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| 467 | int c; |
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| 468 | |
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| 469 | getMetric(fontinfo, glist[i], &tgi); |
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| 470 | width = tgi.width; |
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| 471 | height = tgi.height; |
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| 472 | if (height > 0 && width > 0) { |
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| 473 | for (j = i; j < len;) { |
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| 474 | if (height > 0 && width > 0) { |
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| 475 | if (px + width + gap < texw) { |
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| 476 | foundWidthFit = 1; |
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| 477 | if (j != i) { |
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| 478 | i--; /* Step back so i loop increment leaves us at same character. */ |
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| 479 | } |
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| 480 | break; |
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| 481 | } |
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| 482 | } |
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| 483 | j++; |
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| 484 | getMetric(fontinfo, glist[j], &tgi); |
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| 485 | width = tgi.width; |
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| 486 | height = tgi.height; |
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| 487 | } |
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| 488 | |
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| 489 | /* If a fit was found, use that character; otherwise, advance a line |
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| 490 | in the texture. */ |
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| 491 | if (foundWidthFit) { |
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| 492 | if (height > maxheight) { |
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| 493 | maxheight = height; |
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| 494 | } |
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| 495 | c = j; |
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| 496 | } else { |
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| 497 | getMetric(fontinfo, glist[i], &tgi); |
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| 498 | width = tgi.width; |
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| 499 | height = tgi.height; |
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| 500 | |
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| 501 | py += maxheight + gap; |
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| 502 | px = gap; |
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| 503 | maxheight = height; |
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| 504 | if (py + height + gap >= texh) { |
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| 505 | printf("Overflowed texture space.\n"); |
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| 506 | exit(1); |
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| 507 | } |
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| 508 | c = i; |
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| 509 | } |
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| 510 | |
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| 511 | /* Place the glyph in the texture image. */ |
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| 512 | placeGlyph(fontinfo, glist[c], texarea, texw, px, py); |
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| 513 | |
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| 514 | /* Assign glyph's texture coordinate. */ |
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| 515 | tgi.x = px; |
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| 516 | tgi.y = py; |
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| 517 | |
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| 518 | /* Advance by glyph width, remaining in the current line. */ |
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| 519 | px += width + gap; |
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| 520 | } else { |
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| 521 | /* No texture image; assign invalid bogus texture coordinates. */ |
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| 522 | tgi.x = -1; |
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| 523 | tgi.y = -1; |
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| 524 | } |
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| 525 | glist[c] = 0; /* Mark processed; don't process again. */ |
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| 526 | assert(sizeof(tgi) == 12); /* Ensure external file format size. */ |
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| 527 | fwrite(&tgi, sizeof(tgi), 1, file); |
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| 528 | } |
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| 529 | } |
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| 530 | |
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| 531 | switch (format) { |
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| 532 | case TXF_FORMAT_BYTE: |
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| 533 | fwrite(texarea, texw * texh, 1, file); |
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| 534 | break; |
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| 535 | case TXF_FORMAT_BITMAP: |
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| 536 | stride = (texw + 7) >> 3; |
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| 537 | texbitmap = (unsigned char *) calloc(stride * texh, 1); |
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| 538 | for (i = 0; i < texh; i++) { |
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| 539 | for (j = 0; j < texw; j++) { |
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| 540 | if (texarea[i * texw + j] >= 128) { |
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| 541 | texbitmap[i * stride + (j >> 3)] |= 1 << (j & 7); |
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| 542 | } |
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| 543 | } |
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| 544 | } |
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| 545 | fwrite(texbitmap, stride * texh, 1, file); |
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| 546 | free(texbitmap); |
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| 547 | break; |
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| 548 | default: |
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| 549 | printf("Unknown texture font format.\n"); |
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| 550 | exit(1); |
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| 551 | } |
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| 552 | free(texarea); |
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| 553 | fclose(file); |
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| 554 | return 0; |
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| 555 | } |
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