| File: | c:\siege\siege/src/siege/internal/stb/stb_truetype.h |
| Location: | line 922, column 10 |
| Description: | Value stored to 'start' is never read |
| 1 | // stb_truetype.h - v0.6c - public domain |
| 2 | // authored from 2009-2012 by Sean Barrett / RAD Game Tools |
| 3 | // |
| 4 | // This library processes TrueType files: |
| 5 | // parse files |
| 6 | // extract glyph metrics |
| 7 | // extract glyph shapes |
| 8 | // render glyphs to one-channel bitmaps with antialiasing (box filter) |
| 9 | // |
| 10 | // Todo: |
| 11 | // non-MS cmaps |
| 12 | // crashproof on bad data |
| 13 | // hinting? (no longer patented) |
| 14 | // cleartype-style AA? |
| 15 | // optimize: use simple memory allocator for intermediates |
| 16 | // optimize: build edge-list directly from curves |
| 17 | // optimize: rasterize directly from curves? |
| 18 | // |
| 19 | // ADDITIONAL CONTRIBUTORS |
| 20 | // |
| 21 | // Mikko Mononen: compound shape support, more cmap formats |
| 22 | // Tor Andersson: kerning, subpixel rendering |
| 23 | // |
| 24 | // Bug/warning reports: |
| 25 | // "Zer" on mollyrocket (with fix) |
| 26 | // Cass Everitt |
| 27 | // stoiko (Haemimont Games) |
| 28 | // Brian Hook |
| 29 | // Walter van Niftrik |
| 30 | // |
| 31 | // VERSION HISTORY |
| 32 | // |
| 33 | // 0.6c (2012-07-24) improve documentation |
| 34 | // 0.6b (2012-07-20) fix a few more warnings |
| 35 | // 0.6 (2012-07-17) fix warnings; added stbtt_ScaleForMappingEmToPixels, |
| 36 | // stbtt_GetFontBoundingBox, stbtt_IsGlyphEmpty |
| 37 | // 0.5 (2011-12-09) bugfixes: |
| 38 | // subpixel glyph renderer computed wrong bounding box |
| 39 | // first vertex of shape can be off-curve (FreeSans) |
| 40 | // 0.4b (2011-12-03) fixed an error in the font baking example |
| 41 | // 0.4 (2011-12-01) kerning, subpixel rendering (tor) |
| 42 | // bugfixes for: |
| 43 | // codepoint-to-glyph conversion using table fmt=12 |
| 44 | // codepoint-to-glyph conversion using table fmt=4 |
| 45 | // stbtt_GetBakedQuad with non-square texture (Zer) |
| 46 | // updated Hello World! sample to use kerning and subpixel |
| 47 | // fixed some warnings |
| 48 | // 0.3 (2009-06-24) cmap fmt=12, compound shapes (MM) |
| 49 | // userdata, malloc-from-userdata, non-zero fill (STB) |
| 50 | // 0.2 (2009-03-11) Fix unsigned/signed char warnings |
| 51 | // 0.1 (2009-03-09) First public release |
| 52 | // |
| 53 | // LICENSE |
| 54 | // |
| 55 | // This software is in the public domain. Where that dedication is not |
| 56 | // recognized, you are granted a perpetual, irrevokable license to copy |
| 57 | // and modify this file as you see fit. |
| 58 | // |
| 59 | // USAGE |
| 60 | // |
| 61 | // Include this file in whatever places neeed to refer to it. In ONE C/C++ |
| 62 | // file, write: |
| 63 | // #define STB_TRUETYPE_IMPLEMENTATION |
| 64 | // before the #include of this file. This expands out the actual |
| 65 | // implementation into that C/C++ file. |
| 66 | // |
| 67 | // Simple 3D API (don't ship this, but it's fine for tools and quick start, |
| 68 | // and you can cut and paste from it to move to more advanced) |
| 69 | // stbtt_BakeFontBitmap() -- bake a font to a bitmap for use as texture |
| 70 | // stbtt_GetBakedQuad() -- compute quad to draw for a given char |
| 71 | // |
| 72 | // "Load" a font file from a memory buffer (you have to keep the buffer loaded) |
| 73 | // stbtt_InitFont() |
| 74 | // stbtt_GetFontOffsetForIndex() -- use for TTC font collections |
| 75 | // |
| 76 | // Render a unicode codepoint to a bitmap |
| 77 | // stbtt_GetCodepointBitmap() -- allocates and returns a bitmap |
| 78 | // stbtt_MakeCodepointBitmap() -- renders into bitmap you provide |
| 79 | // stbtt_GetCodepointBitmapBox() -- how big the bitmap must be |
| 80 | // |
| 81 | // Character advance/positioning |
| 82 | // stbtt_GetCodepointHMetrics() |
| 83 | // stbtt_GetFontVMetrics() |
| 84 | // stbtt_GetCodepointKernAdvance() |
| 85 | // |
| 86 | // ADDITIONAL DOCUMENTATION |
| 87 | // |
| 88 | // Immediately after this block comment are a series of sample programs. |
| 89 | // |
| 90 | // After the sample programs is the "header file" section. This section |
| 91 | // includes documentation for each API function. |
| 92 | // |
| 93 | // Some important concepts to understand to use this library: |
| 94 | // |
| 95 | // Codepoint |
| 96 | // Characters are defined by unicode codepoints, e.g. 65 is |
| 97 | // uppercase A, 231 is lowercase c with a cedilla, 0x7e30 is |
| 98 | // the hiragana for "ma". |
| 99 | // |
| 100 | // Glyph |
| 101 | // A visual character shape (every codepoint is rendered as |
| 102 | // some glyph) |
| 103 | // |
| 104 | // Glyph index |
| 105 | // A font-specific integer ID representing a glyph |
| 106 | // |
| 107 | // Baseline |
| 108 | // Glyph shapes are defined relative to a baseline, which is the |
| 109 | // bottom of uppercase characters. Characters extend both above |
| 110 | // and below the baseline. |
| 111 | // |
| 112 | // Current Point |
| 113 | // As you draw text to the screen, you keep track of a "current point" |
| 114 | // which is the origin of each character. The current point's vertical |
| 115 | // position is the baseline. Even "baked fonts" use this model. |
| 116 | // |
| 117 | // Vertical Font Metrics |
| 118 | // The vertical qualities of the font, used to vertically position |
| 119 | // and space the characters. See docs for stbtt_GetFontVMetrics. |
| 120 | // |
| 121 | // Font Size in Pixels or Points |
| 122 | // The preferred interface for specifying font sizes in stb_truetype |
| 123 | // is to specify how tall the font's vertical extent should be in pixels. |
| 124 | // If that sounds good enough, skip the next paragraph. |
| 125 | // |
| 126 | // Most font APIs instead use "points", which are a common typographic |
| 127 | // measurement for describing font size, defined as 72 points per inch. |
| 128 | // stb_truetype provides a point API for compatibility. However, true |
| 129 | // "per inch" conventions don't make much sense on computer displays |
| 130 | // since they different monitors have different number of pixels per |
| 131 | // inch. For example, Windows traditionally uses a convention that |
| 132 | // there are 96 pixels per inch, thus making 'inch' measurements have |
| 133 | // nothing to do with inches, and thus effectively defining a point to |
| 134 | // be 1.333 pixels. Additionally, the TrueType font data provides |
| 135 | // an explicit scale factor to scale a given font's glyphs to points, |
| 136 | // but the author has observed that this scale factor is often wrong |
| 137 | // for non-commercial fonts, thus making fonts scaled in points |
| 138 | // according to the TrueType spec incoherently sized in practice. |
| 139 | // |
| 140 | // ADVANCED USAGE |
| 141 | // |
| 142 | // Quality: |
| 143 | // |
| 144 | // - Use the functions with Subpixel at the end to allow your characters |
| 145 | // to have subpixel positioning. Since the font is anti-aliased, not |
| 146 | // hinted, this is very import for quality. (This is not possible with |
| 147 | // baked fonts.) |
| 148 | // |
| 149 | // - Kerning is now supported, and if you're supporting subpixel rendering |
| 150 | // then kerning is worth using to give your text a polished look. |
| 151 | // |
| 152 | // Performance: |
| 153 | // |
| 154 | // - Convert Unicode codepoints to glyph indexes and operate on the glyphs; |
| 155 | // if you don't do this, stb_truetype is forced to do the conversion on |
| 156 | // every call. |
| 157 | // |
| 158 | // - There are a lot of memory allocations. We should modify it to take |
| 159 | // a temp buffer and allocate from the temp buffer (without freeing), |
| 160 | // should help performance a lot. |
| 161 | // |
| 162 | // NOTES |
| 163 | // |
| 164 | // The system uses the raw data found in the .ttf file without changing it |
| 165 | // and without building auxiliary data structures. This is a bit inefficient |
| 166 | // on little-endian systems (the data is big-endian), but assuming you're |
| 167 | // caching the bitmaps or glyph shapes this shouldn't be a big deal. |
| 168 | // |
| 169 | // It appears to be very hard to programmatically determine what font a |
| 170 | // given file is in a general way. I provide an API for this, but I don't |
| 171 | // recommend it. |
| 172 | // |
| 173 | // |
| 174 | // SOURCE STATISTICS (based on v0.6c, 2050 LOC) |
| 175 | // |
| 176 | // Documentation & header file 520 LOC \___ 660 LOC documentation |
| 177 | // Sample code 140 LOC / |
| 178 | // Truetype parsing 620 LOC ---- 620 LOC TrueType |
| 179 | // Software rasterization 240 LOC \ . |
| 180 | // Curve tesselation 120 LOC \__ 550 LOC Bitmap creation |
| 181 | // Bitmap management 100 LOC / |
| 182 | // Baked bitmap interface 70 LOC / |
| 183 | // Font name matching & access 150 LOC ---- 150 |
| 184 | // C runtime library abstraction 60 LOC ---- 60 |
| 185 | |
| 186 | |
| 187 | ////////////////////////////////////////////////////////////////////////////// |
| 188 | ////////////////////////////////////////////////////////////////////////////// |
| 189 | //// |
| 190 | //// SAMPLE PROGRAMS |
| 191 | //// |
| 192 | // |
| 193 | // Incomplete text-in-3d-api example, which draws quads properly aligned to be lossless |
| 194 | // |
| 195 | #if 0 |
| 196 | #define STB_TRUETYPE_IMPLEMENTATION // force following include to generate implementation |
| 197 | #include "stb_truetype.h" |
| 198 | |
| 199 | char ttf_buffer[1<<20]; |
| 200 | unsigned char temp_bitmap[512*512]; |
| 201 | |
| 202 | stbtt_bakedchar cdata[96]; // ASCII 32..126 is 95 glyphs |
| 203 | GLstbtt_uint ftex; |
| 204 | |
| 205 | void my_stbtt_initfont(void) |
| 206 | { |
| 207 | fread(ttf_buffer, 1, 1<<20, fopen("c:/windows/fonts/times.ttf", "rb")); |
| 208 | stbtt_BakeFontBitmap(data,0, 32.0, temp_bitmap,512,512, 32,96, cdata); // no guarantee this fits! |
| 209 | // can free ttf_buffer at this point |
| 210 | glGenTextures(1, &ftex); |
| 211 | glBindTexture(GL_TEXTURE_2D, ftex); |
| 212 | glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 512,512, 0, GL_ALPHA, GL_UNSIGNED_BYTE, temp_bitmap); |
| 213 | // can free temp_bitmap at this point |
| 214 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
| 215 | } |
| 216 | |
| 217 | void my_stbtt_print(float x, float y, char *text) |
| 218 | { |
| 219 | // assume orthographic projection with units = screen pixels, origin at top left |
| 220 | glBindTexture(GL_TEXTURE_2D, ftex); |
| 221 | glBegin(GL_QUADS); |
| 222 | while (*text) { |
| 223 | if (*text >= 32 && *text < 128) { |
| 224 | stbtt_aligned_quad q; |
| 225 | stbtt_GetBakedQuad(cdata, 512,512, *text-32, &x,&y,&q,1);//1=opengl,0=old d3d |
| 226 | glTexCoord2f(q.s0,q.t1); glVertex2f(q.x0,q.y0); |
| 227 | glTexCoord2f(q.s1,q.t1); glVertex2f(q.x1,q.y0); |
| 228 | glTexCoord2f(q.s1,q.t0); glVertex2f(q.x1,q.y1); |
| 229 | glTexCoord2f(q.s0,q.t0); glVertex2f(q.x0,q.y1); |
| 230 | } |
| 231 | ++text; |
| 232 | } |
| 233 | glEnd(); |
| 234 | } |
| 235 | #endif |
| 236 | // |
| 237 | // |
| 238 | ////////////////////////////////////////////////////////////////////////////// |
| 239 | // |
| 240 | // Complete program (this compiles): get a single bitmap, print as ASCII art |
| 241 | // |
| 242 | #if 0 |
| 243 | #include <stdio.h> |
| 244 | #define STB_TRUETYPE_IMPLEMENTATION // force following include to generate implementation |
| 245 | #include "stb_truetype.h" |
| 246 | |
| 247 | char ttf_buffer[1<<25]; |
| 248 | |
| 249 | int main(int argc, char **argv) |
| 250 | { |
| 251 | stbtt_fontinfo font; |
| 252 | unsigned char *bitmap; |
| 253 | int w,h,i,j,c = (argc > 1 ? atoi(argv[1]) : 'a'), s = (argc > 2 ? atoi(argv[2]) : 20); |
| 254 | |
| 255 | fread(ttf_buffer, 1, 1<<25, fopen(argc > 3 ? argv[3] : "c:/windows/fonts/arialbd.ttf", "rb")); |
| 256 | |
| 257 | stbtt_InitFont(&font, ttf_buffer, stbtt_GetFontOffsetForIndex(ttf_buffer,0)); |
| 258 | bitmap = stbtt_GetCodepointBitmap(&font, 0,stbtt_ScaleForPixelHeight(&font, s), c, &w, &h, 0,0); |
| 259 | |
| 260 | for (j=0; j < h; ++j) { |
| 261 | for (i=0; i < w; ++i) |
| 262 | putchar(" .:ioVM@"[bitmap[j*w+i]>>5]); |
| 263 | putchar('\n'); |
| 264 | } |
| 265 | return 0; |
| 266 | } |
| 267 | #endif |
| 268 | // |
| 269 | // Output: |
| 270 | // |
| 271 | // .ii. |
| 272 | // @@@@@@. |
| 273 | // V@Mio@@o |
| 274 | // :i. V@V |
| 275 | // :oM@@M |
| 276 | // :@@@MM@M |
| 277 | // @@o o@M |
| 278 | // :@@. M@M |
| 279 | // @@@o@@@@ |
| 280 | // :M@@V:@@. |
| 281 | // |
| 282 | ////////////////////////////////////////////////////////////////////////////// |
| 283 | // |
| 284 | // Complete program: print "Hello World!" banner, with bugs |
| 285 | // |
| 286 | #if 0 |
| 287 | char buffer[24<<20]; |
| 288 | unsigned char screen[20][79]; |
| 289 | |
| 290 | int main(int arg, char **argv) |
| 291 | { |
| 292 | stbtt_fontinfo font; |
| 293 | int i,j,ascent,baseline,ch=0; |
| 294 | float scale, xpos=0; |
| 295 | char *text = "Heljo World!"; |
| 296 | |
| 297 | fread(buffer, 1, 1000000, fopen("c:/windows/fonts/arialbd.ttf", "rb")); |
| 298 | stbtt_InitFont(&font, buffer, 0); |
| 299 | |
| 300 | scale = stbtt_ScaleForPixelHeight(&font, 15); |
| 301 | stbtt_GetFontVMetrics(&font, &ascent,0,0); |
| 302 | baseline = (int) (ascent*scale); |
| 303 | |
| 304 | while (text[ch]) { |
| 305 | int advance,lsb,x0,y0,x1,y1; |
| 306 | float x_shift = xpos - (float) floor(xpos); |
| 307 | stbtt_GetCodepointHMetrics(&font, text[ch], &advance, &lsb); |
| 308 | stbtt_GetCodepointBitmapBoxSubpixel(&font, text[ch], scale,scale,x_shift,0, &x0,&y0,&x1,&y1); |
| 309 | stbtt_MakeCodepointBitmapSubpixel(&font, &screen[baseline + y0][(int) xpos + x0], x1-x0,y1-y0, 79, scale,scale,x_shift,0, text[ch]); |
| 310 | // note that this stomps the old data, so where character boxes overlap (e.g. 'lj') it's wrong |
| 311 | // because this API is really for baking character bitmaps into textures. if you want to render |
| 312 | // a sequence of characters, you really need to render each bitmap to a temp buffer, then |
| 313 | // "alpha blend" that into the working buffer |
| 314 | xpos += (advance * scale); |
| 315 | if (text[ch+1]) |
| 316 | xpos += scale*stbtt_GetCodepointKernAdvance(&font, text[ch],text[ch+1]); |
| 317 | ++ch; |
| 318 | } |
| 319 | |
| 320 | for (j=0; j < 20; ++j) { |
| 321 | for (i=0; i < 78; ++i) |
| 322 | putchar(" .:ioVM@"[screen[j][i]>>5]); |
| 323 | putchar('\n'); |
| 324 | } |
| 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | #endif |
| 329 | |
| 330 | |
| 331 | ////////////////////////////////////////////////////////////////////////////// |
| 332 | ////////////////////////////////////////////////////////////////////////////// |
| 333 | //// |
| 334 | //// INTEGRATION WITH YOUR CODEBASE |
| 335 | //// |
| 336 | //// The following sections allow you to supply alternate definitions |
| 337 | //// of C library functions used by stb_truetype. |
| 338 | |
| 339 | #ifdef STB_TRUETYPE_IMPLEMENTATION |
| 340 | // #define your own (u)stbtt_int8/16/32 before including to override this |
| 341 | #ifndef stbtt_uint8 |
| 342 | typedef unsigned char stbtt_uint8; |
| 343 | typedef signed char stbtt_int8; |
| 344 | typedef unsigned short stbtt_uint16; |
| 345 | typedef signed short stbtt_int16; |
| 346 | typedef unsigned int stbtt_uint32; |
| 347 | typedef signed int stbtt_int32; |
| 348 | #endif |
| 349 | |
| 350 | typedef char stbtt__check_size32[sizeof(stbtt_int32)==4 ? 1 : -1]; |
| 351 | typedef char stbtt__check_size16[sizeof(stbtt_int16)==2 ? 1 : -1]; |
| 352 | |
| 353 | // #define your own STBTT_sort() to override this to avoid qsort |
| 354 | #ifndef STBTT_sort |
| 355 | #include <stdlib.h> |
| 356 | #define STBTT_sort(data,num_items,item_size,compare_func)qsort(data,num_items,item_size,compare_func) qsort(data,num_items,item_size,compare_func) |
| 357 | #endif |
| 358 | |
| 359 | // #define your own STBTT_ifloor/STBTT_iceil() to avoid math.h |
| 360 | #ifndef STBTT_ifloor |
| 361 | #include <math.h> |
| 362 | #define STBTT_ifloor(x)((int) floor(x)) ((int) floor(x)) |
| 363 | #define STBTT_iceil(x)((int) ceil(x)) ((int) ceil(x)) |
| 364 | #endif |
| 365 | |
| 366 | // #define your own functions "STBTT_malloc" / "STBTT_free" to avoid malloc.h |
| 367 | #ifndef STBTT_malloc |
| 368 | #include <stdlib.h> |
| 369 | #define STBTT_malloc(x,u)malloc(x) malloc(x) |
| 370 | #define STBTT_free(x,u)free(x) free(x) |
| 371 | #endif |
| 372 | |
| 373 | #ifndef STBTT_assert |
| 374 | #include <assert.h> |
| 375 | #define STBTT_assert(x)((x) ? (void)0 : _assert("x", "src/siege/internal/stb/stb_truetype.h" , 375)) assert(x)((x) ? (void)0 : _assert("x", "src/siege/internal/stb/stb_truetype.h" , 375)) |
| 376 | #endif |
| 377 | |
| 378 | #ifndef STBTT_strlen |
| 379 | #include <string.h> |
| 380 | #define STBTT_strlen(x)strlen(x) strlen(x) |
| 381 | #endif |
| 382 | |
| 383 | #ifndef STBTT_memcpymemcpy |
| 384 | #include <memory.h> |
| 385 | #define STBTT_memcpymemcpy memcpy |
| 386 | #define STBTT_memsetmemset memset |
| 387 | #endif |
| 388 | #endif |
| 389 | |
| 390 | /////////////////////////////////////////////////////////////////////////////// |
| 391 | /////////////////////////////////////////////////////////////////////////////// |
| 392 | //// |
| 393 | //// INTERFACE |
| 394 | //// |
| 395 | //// |
| 396 | |
| 397 | #ifndef __STB_INCLUDE_STB_TRUETYPE_H__ |
| 398 | #define __STB_INCLUDE_STB_TRUETYPE_H__ |
| 399 | |
| 400 | #ifdef __cplusplus |
| 401 | extern "C" { |
| 402 | #endif |
| 403 | |
| 404 | ////////////////////////////////////////////////////////////////////////////// |
| 405 | // |
| 406 | // TEXTURE BAKING API |
| 407 | // |
| 408 | // If you use this API, you only have to call two functions ever. |
| 409 | // |
| 410 | |
| 411 | typedef struct |
| 412 | { |
| 413 | unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap |
| 414 | float xoff,yoff,xadvance; |
| 415 | } stbtt_bakedchar; |
| 416 | |
| 417 | extern int stbtt_BakeFontBitmap(const unsigned char *data, int offset, // font location (use offset=0 for plain .ttf) |
| 418 | float pixel_height, // height of font in pixels |
| 419 | unsigned char *pixels, int pw, int ph, // bitmap to be filled in |
| 420 | int first_char, int num_chars, // characters to bake |
| 421 | stbtt_bakedchar *chardata); // you allocate this, it's num_chars long |
| 422 | // if return is positive, the first unused row of the bitmap |
| 423 | // if return is negative, returns the negative of the number of characters that fit |
| 424 | // if return is 0, no characters fit and no rows were used |
| 425 | // This uses a very crappy packing. |
| 426 | |
| 427 | typedef struct |
| 428 | { |
| 429 | float x0,y0,s0,t0; // top-left |
| 430 | float x1,y1,s1,t1; // bottom-right |
| 431 | } stbtt_aligned_quad; |
| 432 | |
| 433 | extern void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph, // same data as above |
| 434 | int char_index, // character to display |
| 435 | float *xpos, float *ypos, // pointers to current position in screen pixel space |
| 436 | stbtt_aligned_quad *q, // output: quad to draw |
| 437 | int opengl_fillrule); // true if opengl fill rule; false if DX9 or earlier |
| 438 | // Call GetBakedQuad with char_index = 'character - first_char', and it |
| 439 | // creates the quad you need to draw and advances the current position. |
| 440 | // |
| 441 | // The coordinate system used assumes y increases downwards. |
| 442 | // |
| 443 | // Characters will extend both above and below the current position; |
| 444 | // see discussion of "BASELINE" above. |
| 445 | // |
| 446 | // It's inefficient; you might want to c&p it and optimize it. |
| 447 | |
| 448 | |
| 449 | ////////////////////////////////////////////////////////////////////////////// |
| 450 | // |
| 451 | // FONT LOADING |
| 452 | // |
| 453 | // |
| 454 | |
| 455 | extern int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index); |
| 456 | // Each .ttf/.ttc file may have more than one font. Each font has a sequential |
| 457 | // index number starting from 0. Call this function to get the font offset for |
| 458 | // a given index; it returns -1 if the index is out of range. A regular .ttf |
| 459 | // file will only define one font and it always be at offset 0, so it will |
| 460 | // return '0' for index 0, and -1 for all other indices. You can just skip |
| 461 | // this step if you know it's that kind of font. |
| 462 | |
| 463 | |
| 464 | // The following structure is defined publically so you can declare one on |
| 465 | // the stack or as a global or etc, but you should treat it as opaque. |
| 466 | typedef struct stbtt_fontinfo |
| 467 | { |
| 468 | void * userdata; |
| 469 | unsigned char * data; // pointer to .ttf file |
| 470 | int fontstart; // offset of start of font |
| 471 | |
| 472 | int numGlyphs; // number of glyphs, needed for range checking |
| 473 | |
| 474 | int loca,head,glyf,hhea,hmtx,kern; // table locations as offset from start of .ttf |
| 475 | int index_map; // a cmap mapping for our chosen character encoding |
| 476 | int indexToLocFormat; // format needed to map from glyph index to glyph |
| 477 | } stbtt_fontinfo; |
| 478 | |
| 479 | extern int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset); |
| 480 | // Given an offset into the file that defines a font, this function builds |
| 481 | // the necessary cached info for the rest of the system. You must allocate |
| 482 | // the stbtt_fontinfo yourself, and stbtt_InitFont will fill it out. You don't |
| 483 | // need to do anything special to free it, because the contents are pure |
| 484 | // value data with no additional data structures. Returns 0 on failure. |
| 485 | |
| 486 | |
| 487 | ////////////////////////////////////////////////////////////////////////////// |
| 488 | // |
| 489 | // CHARACTER TO GLYPH-INDEX CONVERSIOn |
| 490 | |
| 491 | int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint); |
| 492 | // If you're going to perform multiple operations on the same character |
| 493 | // and you want a speed-up, call this function with the character you're |
| 494 | // going to process, then use glyph-based functions instead of the |
| 495 | // codepoint-based functions. |
| 496 | |
| 497 | |
| 498 | ////////////////////////////////////////////////////////////////////////////// |
| 499 | // |
| 500 | // CHARACTER PROPERTIES |
| 501 | // |
| 502 | |
| 503 | extern float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float pixels); |
| 504 | // computes a scale factor to produce a font whose "height" is 'pixels' tall. |
| 505 | // Height is measured as the distance from the highest ascender to the lowest |
| 506 | // descender; in other words, it's equivalent to calling stbtt_GetFontVMetrics |
| 507 | // and computing: |
| 508 | // scale = pixels / (ascent - descent) |
| 509 | // so if you prefer to measure height by the ascent only, use a similar calculation. |
| 510 | |
| 511 | extern float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels); |
| 512 | // computes a scale factor to produce a font whose EM size is mapped to |
| 513 | // 'pixels' tall. This is probably what traditional APIs compute, but |
| 514 | // I'm not positive. |
| 515 | |
| 516 | extern void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap); |
| 517 | // ascent is the coordinate above the baseline the font extends; descent |
| 518 | // is the coordinate below the baseline the font extends (i.e. it is typically negative) |
| 519 | // lineGap is the spacing between one row's descent and the next row's ascent... |
| 520 | // so you should advance the vertical position by "*ascent - *descent + *lineGap" |
| 521 | // these are expressed in unscaled coordinates, so you must multiply by |
| 522 | // the scale factor for a given size |
| 523 | |
| 524 | extern void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1); |
| 525 | // the bounding box around all possible characters |
| 526 | |
| 527 | extern void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing); |
| 528 | // leftSideBearing is the offset from the current horizontal position to the left edge of the character |
| 529 | // advanceWidth is the offset from the current horizontal position to the next horizontal position |
| 530 | // these are expressed in unscaled coordinates |
| 531 | |
| 532 | extern int stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2); |
| 533 | // an additional amount to add to the 'advance' value between ch1 and ch2 |
| 534 | // @TODO; for now always returns 0! |
| 535 | |
| 536 | extern int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1); |
| 537 | // Gets the bounding box of the visible part of the glyph, in unscaled coordinates |
| 538 | |
| 539 | extern void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing); |
| 540 | extern int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2); |
| 541 | extern int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1); |
| 542 | // as above, but takes one or more glyph indices for greater efficiency |
| 543 | |
| 544 | |
| 545 | ////////////////////////////////////////////////////////////////////////////// |
| 546 | // |
| 547 | // GLYPH SHAPES (you probably don't need these, but they have to go before |
| 548 | // the bitmaps for C declaration-order reasons) |
| 549 | // |
| 550 | |
| 551 | #ifndef STBTT_vmove // you can predefine these to use different values (but why?) |
| 552 | enum { |
| 553 | STBTT_vmove=1, |
| 554 | STBTT_vline, |
| 555 | STBTT_vcurve |
| 556 | }; |
| 557 | #endif |
| 558 | |
| 559 | #ifndef stbtt_vertex // you can predefine this to use different values |
| 560 | // (we share this with other code at RAD) |
| 561 | #define stbtt_vertex_typeshort short // can't use stbtt_int16 because that's not visible in the header file |
| 562 | typedef struct |
| 563 | { |
| 564 | stbtt_vertex_typeshort x,y,cx,cy; |
| 565 | unsigned char type,padding; |
| 566 | } stbtt_vertex; |
| 567 | #endif |
| 568 | |
| 569 | extern int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index); |
| 570 | // returns non-zero if nothing is drawn for this glyph |
| 571 | |
| 572 | extern int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices); |
| 573 | extern int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **vertices); |
| 574 | // returns # of vertices and fills *vertices with the pointer to them |
| 575 | // these are expressed in "unscaled" coordinates |
| 576 | |
| 577 | extern void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *vertices); |
| 578 | // frees the data allocated above |
| 579 | |
| 580 | ////////////////////////////////////////////////////////////////////////////// |
| 581 | // |
| 582 | // BITMAP RENDERING |
| 583 | // |
| 584 | |
| 585 | extern void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata); |
| 586 | // frees the bitmap allocated below |
| 587 | |
| 588 | extern unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff); |
| 589 | // allocates a large-enough single-channel 8bpp bitmap and renders the |
| 590 | // specified character/glyph at the specified scale into it, with |
| 591 | // antialiasing. 0 is no coverage (transparent), 255 is fully covered (opaque). |
| 592 | // *width & *height are filled out with the width & height of the bitmap, |
| 593 | // which is stored left-to-right, top-to-bottom. |
| 594 | // |
| 595 | // xoff/yoff are the offset it pixel space from the glyph origin to the top-left of the bitmap |
| 596 | |
| 597 | extern unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff); |
| 598 | // the same as stbtt_GetCodepoitnBitmap, but you can specify a subpixel |
| 599 | // shift for the character |
| 600 | |
| 601 | extern void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint); |
| 602 | // the same as stbtt_GetCodepointBitmap, but you pass in storage for the bitmap |
| 603 | // in the form of 'output', with row spacing of 'out_stride' bytes. the bitmap |
| 604 | // is clipped to out_w/out_h bytes. Call stbtt_GetCodepointBitmapBox to get the |
| 605 | // width and height and positioning info for it first. |
| 606 | |
| 607 | extern void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint); |
| 608 | // same as stbtt_MakeCodepointBitmap, but you can specify a subpixel |
| 609 | // shift for the character |
| 610 | |
| 611 | extern void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1); |
| 612 | // get the bbox of the bitmap centered around the glyph origin; so the |
| 613 | // bitmap width is ix1-ix0, height is iy1-iy0, and location to place |
| 614 | // the bitmap top left is (leftSideBearing*scale,iy0). |
| 615 | // (Note that the bitmap uses y-increases-down, but the shape uses |
| 616 | // y-increases-up, so CodepointBitmapBox and CodepointBox are inverted.) |
| 617 | |
| 618 | extern void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1); |
| 619 | // same as stbtt_GetCodepointBitmapBox, but you can specify a subpixel |
| 620 | // shift for the character |
| 621 | |
| 622 | // the following functions are equivalent to the above functions, but operate |
| 623 | // on glyph indices instead of Unicode codepoints (for efficiency) |
| 624 | extern unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff); |
| 625 | extern unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff); |
| 626 | extern void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph); |
| 627 | extern void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph); |
| 628 | extern void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1); |
| 629 | extern void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1); |
| 630 | |
| 631 | |
| 632 | // @TODO: don't expose this structure |
| 633 | typedef struct |
| 634 | { |
| 635 | int w,h,stride; |
| 636 | unsigned char *pixels; |
| 637 | } stbtt__bitmap; |
| 638 | |
| 639 | extern void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata); |
| 640 | |
| 641 | ////////////////////////////////////////////////////////////////////////////// |
| 642 | // |
| 643 | // Finding the right font... |
| 644 | // |
| 645 | // You should really just solve this offline, keep your own tables |
| 646 | // of what font is what, and don't try to get it out of the .ttf file. |
| 647 | // That's because getting it out of the .ttf file is really hard, because |
| 648 | // the names in the file can appear in many possible encodings, in many |
| 649 | // possible languages, and e.g. if you need a case-insensitive comparison, |
| 650 | // the details of that depend on the encoding & language in a complex way |
| 651 | // (actually underspecified in truetype, but also gigantic). |
| 652 | // |
| 653 | // But you can use the provided functions in two possible ways: |
| 654 | // stbtt_FindMatchingFont() will use *case-sensitive* comparisons on |
| 655 | // unicode-encoded names to try to find the font you want; |
| 656 | // you can run this before calling stbtt_InitFont() |
| 657 | // |
| 658 | // stbtt_GetFontNameString() lets you get any of the various strings |
| 659 | // from the file yourself and do your own comparisons on them. |
| 660 | // You have to have called stbtt_InitFont() first. |
| 661 | |
| 662 | |
| 663 | extern int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags); |
| 664 | // returns the offset (not index) of the font that matches, or -1 if none |
| 665 | // if you use STBTT_MACSTYLE_DONTCARE, use a font name like "Arial Bold". |
| 666 | // if you use any other flag, use a font name like "Arial"; this checks |
| 667 | // the 'macStyle' header field; i don't know if fonts set this consistently |
| 668 | #define STBTT_MACSTYLE_DONTCARE0 0 |
| 669 | #define STBTT_MACSTYLE_BOLD1 1 |
| 670 | #define STBTT_MACSTYLE_ITALIC2 2 |
| 671 | #define STBTT_MACSTYLE_UNDERSCORE4 4 |
| 672 | #define STBTT_MACSTYLE_NONE8 8 // <= not same as 0, this makes us check the bitfield is 0 |
| 673 | |
| 674 | extern int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2); |
| 675 | // returns 1/0 whether the first string interpreted as utf8 is identical to |
| 676 | // the second string interpreted as big-endian utf16... useful for strings from next func |
| 677 | |
| 678 | extern const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID); |
| 679 | // returns the string (which may be big-endian double byte, e.g. for unicode) |
| 680 | // and puts the length in bytes in *length. |
| 681 | // |
| 682 | // some of the values for the IDs are below; for more see the truetype spec: |
| 683 | // http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6name.html |
| 684 | // http://www.microsoft.com/typography/otspec/name.htm |
| 685 | |
| 686 | enum { // platformID |
| 687 | STBTT_PLATFORM_ID_UNICODE =0, |
| 688 | STBTT_PLATFORM_ID_MAC =1, |
| 689 | STBTT_PLATFORM_ID_ISO =2, |
| 690 | STBTT_PLATFORM_ID_MICROSOFT =3 |
| 691 | }; |
| 692 | |
| 693 | enum { // encodingID for STBTT_PLATFORM_ID_UNICODE |
| 694 | STBTT_UNICODE_EID_UNICODE_1_0 =0, |
| 695 | STBTT_UNICODE_EID_UNICODE_1_1 =1, |
| 696 | STBTT_UNICODE_EID_ISO_10646 =2, |
| 697 | STBTT_UNICODE_EID_UNICODE_2_0_BMP=3, |
| 698 | STBTT_UNICODE_EID_UNICODE_2_0_FULL=4 |
| 699 | }; |
| 700 | |
| 701 | enum { // encodingID for STBTT_PLATFORM_ID_MICROSOFT |
| 702 | STBTT_MS_EID_SYMBOL =0, |
| 703 | STBTT_MS_EID_UNICODE_BMP =1, |
| 704 | STBTT_MS_EID_SHIFTJIS =2, |
| 705 | STBTT_MS_EID_UNICODE_FULL =10 |
| 706 | }; |
| 707 | |
| 708 | enum { // encodingID for STBTT_PLATFORM_ID_MAC; same as Script Manager codes |
| 709 | STBTT_MAC_EID_ROMAN =0, STBTT_MAC_EID_ARABIC =4, |
| 710 | STBTT_MAC_EID_JAPANESE =1, STBTT_MAC_EID_HEBREW =5, |
| 711 | STBTT_MAC_EID_CHINESE_TRAD =2, STBTT_MAC_EID_GREEK =6, |
| 712 | STBTT_MAC_EID_KOREAN =3, STBTT_MAC_EID_RUSSIAN =7 |
| 713 | }; |
| 714 | |
| 715 | enum { // languageID for STBTT_PLATFORM_ID_MICROSOFT; same as LCID... |
| 716 | // problematic because there are e.g. 16 english LCIDs and 16 arabic LCIDs |
| 717 | STBTT_MS_LANG_ENGLISH =0x0409, STBTT_MS_LANG_ITALIAN =0x0410, |
| 718 | STBTT_MS_LANG_CHINESE =0x0804, STBTT_MS_LANG_JAPANESE =0x0411, |
| 719 | STBTT_MS_LANG_DUTCH =0x0413, STBTT_MS_LANG_KOREAN =0x0412, |
| 720 | STBTT_MS_LANG_FRENCH =0x040c, STBTT_MS_LANG_RUSSIAN =0x0419, |
| 721 | STBTT_MS_LANG_GERMAN =0x0407, STBTT_MS_LANG_SPANISH =0x0409, |
| 722 | STBTT_MS_LANG_HEBREW =0x040d, STBTT_MS_LANG_SWEDISH =0x041D |
| 723 | }; |
| 724 | |
| 725 | enum { // languageID for STBTT_PLATFORM_ID_MAC |
| 726 | STBTT_MAC_LANG_ENGLISH =0 , STBTT_MAC_LANG_JAPANESE =11, |
| 727 | STBTT_MAC_LANG_ARABIC =12, STBTT_MAC_LANG_KOREAN =23, |
| 728 | STBTT_MAC_LANG_DUTCH =4 , STBTT_MAC_LANG_RUSSIAN =32, |
| 729 | STBTT_MAC_LANG_FRENCH =1 , STBTT_MAC_LANG_SPANISH =6 , |
| 730 | STBTT_MAC_LANG_GERMAN =2 , STBTT_MAC_LANG_SWEDISH =5 , |
| 731 | STBTT_MAC_LANG_HEBREW =10, STBTT_MAC_LANG_CHINESE_SIMPLIFIED =33, |
| 732 | STBTT_MAC_LANG_ITALIAN =3 , STBTT_MAC_LANG_CHINESE_TRAD =19 |
| 733 | }; |
| 734 | |
| 735 | #ifdef __cplusplus |
| 736 | } |
| 737 | #endif |
| 738 | |
| 739 | #endif // __STB_INCLUDE_STB_TRUETYPE_H__ |
| 740 | |
| 741 | /////////////////////////////////////////////////////////////////////////////// |
| 742 | /////////////////////////////////////////////////////////////////////////////// |
| 743 | //// |
| 744 | //// IMPLEMENTATION |
| 745 | //// |
| 746 | //// |
| 747 | |
| 748 | #ifdef STB_TRUETYPE_IMPLEMENTATION |
| 749 | |
| 750 | ////////////////////////////////////////////////////////////////////////// |
| 751 | // |
| 752 | // accessors to parse data from file |
| 753 | // |
| 754 | |
| 755 | // on platforms that don't allow misaligned reads, if we want to allow |
| 756 | // truetype fonts that aren't padded to alignment, define ALLOW_UNALIGNED_TRUETYPE |
| 757 | |
| 758 | #define ttBYTE(p)(* (stbtt_uint8 *) (p)) (* (stbtt_uint8 *) (p)) |
| 759 | #define ttCHAR(p)(* (stbtt_int8 *) (p)) (* (stbtt_int8 *) (p)) |
| 760 | #define ttFixed(p)ttLONG(p) ttLONG(p) |
| 761 | |
| 762 | #if defined(STB_TRUETYPE_BIGENDIAN) && !defined(ALLOW_UNALIGNED_TRUETYPE) |
| 763 | |
| 764 | #define ttUSHORT(p) (* (stbtt_uint16 *) (p)) |
| 765 | #define ttSHORT(p) (* (stbtt_int16 *) (p)) |
| 766 | #define ttULONG(p) (* (stbtt_uint32 *) (p)) |
| 767 | #define ttLONG(p) (* (stbtt_int32 *) (p)) |
| 768 | |
| 769 | #else |
| 770 | |
| 771 | stbtt_uint16 ttUSHORT(const stbtt_uint8 *p) { return p[0]*256 + p[1]; } |
| 772 | stbtt_int16 ttSHORT(const stbtt_uint8 *p) { return p[0]*256 + p[1]; } |
| 773 | stbtt_uint32 ttULONG(const stbtt_uint8 *p) { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; } |
| 774 | stbtt_int32 ttLONG(const stbtt_uint8 *p) { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; } |
| 775 | |
| 776 | #endif |
| 777 | |
| 778 | #define stbtt_tag4(p,c0,c1,c2,c3)((p)[0] == (c0) && (p)[1] == (c1) && (p)[2] == (c2) && (p)[3] == (c3)) ((p)[0] == (c0) && (p)[1] == (c1) && (p)[2] == (c2) && (p)[3] == (c3)) |
| 779 | #define stbtt_tag(p,str)((p)[0] == (str[0]) && (p)[1] == (str[1]) && ( p)[2] == (str[2]) && (p)[3] == (str[3])) stbtt_tag4(p,str[0],str[1],str[2],str[3])((p)[0] == (str[0]) && (p)[1] == (str[1]) && ( p)[2] == (str[2]) && (p)[3] == (str[3])) |
| 780 | |
| 781 | static int stbtt__isfont(const stbtt_uint8 *font) |
| 782 | { |
| 783 | // check the version number |
| 784 | if (stbtt_tag4(font, '1',0,0,0)((font)[0] == ('1') && (font)[1] == (0) && (font )[2] == (0) && (font)[3] == (0))) return 1; // TrueType 1 |
| 785 | if (stbtt_tag(font, "typ1")((font)[0] == ("typ1"[0]) && (font)[1] == ("typ1"[1]) && (font)[2] == ("typ1"[2]) && (font)[3] == ( "typ1"[3]))) return 1; // TrueType with type 1 font -- we don't support this! |
| 786 | if (stbtt_tag(font, "OTTO")((font)[0] == ("OTTO"[0]) && (font)[1] == ("OTTO"[1]) && (font)[2] == ("OTTO"[2]) && (font)[3] == ( "OTTO"[3]))) return 1; // OpenType with CFF |
| 787 | if (stbtt_tag4(font, 0,1,0,0)((font)[0] == (0) && (font)[1] == (1) && (font )[2] == (0) && (font)[3] == (0))) return 1; // OpenType 1.0 |
| 788 | return 0; |
| 789 | } |
| 790 | |
| 791 | // @OPTIMIZE: binary search |
| 792 | static stbtt_uint32 stbtt__find_table(stbtt_uint8 *data, stbtt_uint32 fontstart, const char *tag) |
| 793 | { |
| 794 | stbtt_int32 num_tables = ttUSHORT(data+fontstart+4); |
| 795 | stbtt_uint32 tabledir = fontstart + 12; |
| 796 | stbtt_int32 i; |
| 797 | for (i=0; i < num_tables; ++i) { |
| 798 | stbtt_uint32 loc = tabledir + 16*i; |
| 799 | if (stbtt_tag(data+loc+0, tag)((data+loc+0)[0] == (tag[0]) && (data+loc+0)[1] == (tag [1]) && (data+loc+0)[2] == (tag[2]) && (data+ loc+0)[3] == (tag[3]))) |
| 800 | return ttULONG(data+loc+8); |
| 801 | } |
| 802 | return 0; |
| 803 | } |
| 804 | |
| 805 | int stbtt_GetFontOffsetForIndex(const unsigned char *font_collection, int index) |
| 806 | { |
| 807 | // if it's just a font, there's only one valid index |
| 808 | if (stbtt__isfont(font_collection)) |
| 809 | return index == 0 ? 0 : -1; |
| 810 | |
| 811 | // check if it's a TTC |
| 812 | if (stbtt_tag(font_collection, "ttcf")((font_collection)[0] == ("ttcf"[0]) && (font_collection )[1] == ("ttcf"[1]) && (font_collection)[2] == ("ttcf" [2]) && (font_collection)[3] == ("ttcf"[3]))) { |
| 813 | // version 1? |
| 814 | if (ttULONG(font_collection+4) == 0x00010000 || ttULONG(font_collection+4) == 0x00020000) { |
| 815 | stbtt_int32 n = ttLONG(font_collection+8); |
| 816 | if (index >= n) |
| 817 | return -1; |
| 818 | return ttULONG(font_collection+12+index*14); |
| 819 | } |
| 820 | } |
| 821 | return -1; |
| 822 | } |
| 823 | |
| 824 | int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data2, int fontstart) |
| 825 | { |
| 826 | stbtt_uint8 *data = (stbtt_uint8 *) data2; |
| 827 | stbtt_uint32 cmap, t; |
| 828 | stbtt_int32 i,numTables; |
| 829 | |
| 830 | info->data = data; |
| 831 | info->fontstart = fontstart; |
| 832 | |
| 833 | cmap = stbtt__find_table(data, fontstart, "cmap"); // required |
| 834 | info->loca = stbtt__find_table(data, fontstart, "loca"); // required |
| 835 | info->head = stbtt__find_table(data, fontstart, "head"); // required |
| 836 | info->glyf = stbtt__find_table(data, fontstart, "glyf"); // required |
| 837 | info->hhea = stbtt__find_table(data, fontstart, "hhea"); // required |
| 838 | info->hmtx = stbtt__find_table(data, fontstart, "hmtx"); // required |
| 839 | info->kern = stbtt__find_table(data, fontstart, "kern"); // not required |
| 840 | if (!cmap || !info->loca || !info->head || !info->glyf || !info->hhea || !info->hmtx) |
| 841 | return 0; |
| 842 | |
| 843 | t = stbtt__find_table(data, fontstart, "maxp"); |
| 844 | if (t) |
| 845 | info->numGlyphs = ttUSHORT(data+t+4); |
| 846 | else |
| 847 | info->numGlyphs = 0xffff; |
| 848 | |
| 849 | // find a cmap encoding table we understand *now* to avoid searching |
| 850 | // later. (todo: could make this installable) |
| 851 | // the same regardless of glyph. |
| 852 | numTables = ttUSHORT(data + cmap + 2); |
| 853 | info->index_map = 0; |
| 854 | for (i=0; i < numTables; ++i) { |
| 855 | stbtt_uint32 encoding_record = cmap + 4 + 8 * i; |
| 856 | // find an encoding we understand: |
| 857 | switch(ttUSHORT(data+encoding_record)) { |
| 858 | case STBTT_PLATFORM_ID_MICROSOFT: |
| 859 | switch (ttUSHORT(data+encoding_record+2)) { |
| 860 | case STBTT_MS_EID_UNICODE_BMP: |
| 861 | case STBTT_MS_EID_UNICODE_FULL: |
| 862 | // MS/Unicode |
| 863 | info->index_map = cmap + ttULONG(data+encoding_record+4); |
| 864 | break; |
| 865 | } |
| 866 | break; |
| 867 | } |
| 868 | } |
| 869 | if (info->index_map == 0) |
| 870 | return 0; |
| 871 | |
| 872 | info->indexToLocFormat = ttUSHORT(data+info->head + 50); |
| 873 | return 1; |
| 874 | } |
| 875 | |
| 876 | int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint) |
| 877 | { |
| 878 | stbtt_uint8 *data = info->data; |
| 879 | stbtt_uint32 index_map = info->index_map; |
| 880 | |
| 881 | stbtt_uint16 format = ttUSHORT(data + index_map + 0); |
| 882 | if (format == 0) { // apple byte encoding |
| 883 | stbtt_int32 bytes = ttUSHORT(data + index_map + 2); |
| 884 | if (unicode_codepoint < bytes-6) |
| 885 | return ttBYTE(data + index_map + 6 + unicode_codepoint)(* (stbtt_uint8 *) (data + index_map + 6 + unicode_codepoint) ); |
| 886 | return 0; |
| 887 | } else if (format == 6) { |
| 888 | stbtt_uint32 first = ttUSHORT(data + index_map + 6); |
| 889 | stbtt_uint32 count = ttUSHORT(data + index_map + 8); |
| 890 | if ((stbtt_uint32) unicode_codepoint >= first && (stbtt_uint32) unicode_codepoint < first+count) |
| 891 | return ttUSHORT(data + index_map + 10 + (unicode_codepoint - first)*2); |
| 892 | return 0; |
| 893 | } else if (format == 2) { |
| 894 | STBTT_assert(0)((0) ? (void)0 : _assert("0", "src/siege/internal/stb/stb_truetype.h" , 894)); // @TODO: high-byte mapping for japanese/chinese/korean |
| 895 | return 0; |
| 896 | } else if (format == 4) { // standard mapping for windows fonts: binary search collection of ranges |
| 897 | stbtt_uint16 segcount = ttUSHORT(data+index_map+6) >> 1; |
| 898 | stbtt_uint16 searchRange = ttUSHORT(data+index_map+8) >> 1; |
| 899 | stbtt_uint16 entrySelector = ttUSHORT(data+index_map+10); |
| 900 | stbtt_uint16 rangeShift = ttUSHORT(data+index_map+12) >> 1; |
| 901 | stbtt_uint16 item, offset, start, end; |
| 902 | |
| 903 | // do a binary search of the segments |
| 904 | stbtt_uint32 endCount = index_map + 14; |
| 905 | stbtt_uint32 search = endCount; |
| 906 | |
| 907 | if (unicode_codepoint > 0xffff) |
| 908 | return 0; |
| 909 | |
| 910 | // they lie from endCount .. endCount + segCount |
| 911 | // but searchRange is the nearest power of two, so... |
| 912 | if (unicode_codepoint >= ttUSHORT(data + search + rangeShift*2)) |
| 913 | search += rangeShift*2; |
| 914 | |
| 915 | // now decrement to bias correctly to find smallest |
| 916 | search -= 2; |
| 917 | while (entrySelector) { |
| 918 | /*stbtt_uint16 start, end;*/ |
| 919 | searchRange >>= 1; |
| 920 | start = ttUSHORT(data + search + 2 + segcount*2 + 2); |
| 921 | end = ttUSHORT(data + search + 2); |
| 922 | start = ttUSHORT(data + search + searchRange*2 + segcount*2 + 2); |
Value stored to 'start' is never read | |
| 923 | end = ttUSHORT(data + search + searchRange*2); |
| 924 | if (unicode_codepoint > end) |
| 925 | search += searchRange*2; |
| 926 | --entrySelector; |
| 927 | } |
| 928 | search += 2; |
| 929 | |
| 930 | item = (stbtt_uint16) ((search - endCount) >> 1); |
| 931 | |
| 932 | STBTT_assert(unicode_codepoint <= ttUSHORT(data + endCount + 2*item))((unicode_codepoint <= ttUSHORT(data + endCount + 2*item)) ? (void)0 : _assert("unicode_codepoint <= ttUSHORT(data + endCount + 2*item)" , "src/siege/internal/stb/stb_truetype.h", 932)); |
| 933 | start = ttUSHORT(data + index_map + 14 + segcount*2 + 2 + 2*item); |
| 934 | end = ttUSHORT(data + index_map + 14 + 2 + 2*item); |
| 935 | if (unicode_codepoint < start) |
| 936 | return 0; |
| 937 | |
| 938 | offset = ttUSHORT(data + index_map + 14 + segcount*6 + 2 + 2*item); |
| 939 | if (offset == 0) |
| 940 | return (stbtt_uint16) (unicode_codepoint + ttSHORT(data + index_map + 14 + segcount*4 + 2 + 2*item)); |
| 941 | |
| 942 | return ttUSHORT(data + offset + (unicode_codepoint-start)*2 + index_map + 14 + segcount*6 + 2 + 2*item); |
| 943 | } else if (format == 12 || format == 13) { |
| 944 | stbtt_uint32 ngroups = ttULONG(data+index_map+12); |
| 945 | stbtt_int32 low,high; |
| 946 | low = 0; high = (stbtt_int32)ngroups; |
| 947 | // Binary search the right group. |
| 948 | while (low < high) { |
| 949 | stbtt_int32 mid = low + ((high-low) >> 1); // rounds down, so low <= mid < high |
| 950 | stbtt_uint32 start_char = ttULONG(data+index_map+16+mid*12); |
| 951 | stbtt_uint32 end_char = ttULONG(data+index_map+16+mid*12+4); |
| 952 | if ((stbtt_uint32) unicode_codepoint < start_char) |
| 953 | high = mid; |
| 954 | else if ((stbtt_uint32) unicode_codepoint > end_char) |
| 955 | low = mid+1; |
| 956 | else { |
| 957 | stbtt_uint32 start_glyph = ttULONG(data+index_map+16+mid*12+8); |
| 958 | if (format == 12) |
| 959 | return start_glyph + unicode_codepoint-start_char; |
| 960 | else // format == 13 |
| 961 | return start_glyph; |
| 962 | } |
| 963 | } |
| 964 | return 0; // not found |
| 965 | } |
| 966 | // @TODO |
| 967 | STBTT_assert(0)((0) ? (void)0 : _assert("0", "src/siege/internal/stb/stb_truetype.h" , 967)); |
| 968 | return 0; |
| 969 | } |
| 970 | |
| 971 | int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices) |
| 972 | { |
| 973 | return stbtt_GetGlyphShape(info, stbtt_FindGlyphIndex(info, unicode_codepoint), vertices); |
| 974 | } |
| 975 | |
| 976 | static void stbtt_setvertex(stbtt_vertex *v, stbtt_uint8 type, stbtt_int32 x, stbtt_int32 y, stbtt_int32 cx, stbtt_int32 cy) |
| 977 | { |
| 978 | v->type = type; |
| 979 | v->x = (stbtt_int16) x; |
| 980 | v->y = (stbtt_int16) y; |
| 981 | v->cx = (stbtt_int16) cx; |
| 982 | v->cy = (stbtt_int16) cy; |
| 983 | } |
| 984 | |
| 985 | static int stbtt__GetGlyfOffset(const stbtt_fontinfo *info, int glyph_index) |
| 986 | { |
| 987 | int g1,g2; |
| 988 | |
| 989 | if (glyph_index >= info->numGlyphs) return -1; // glyph index out of range |
| 990 | if (info->indexToLocFormat >= 2) return -1; // unknown index->glyph map format |
| 991 | |
| 992 | if (info->indexToLocFormat == 0) { |
| 993 | g1 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2) * 2; |
| 994 | g2 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2 + 2) * 2; |
| 995 | } else { |
| 996 | g1 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4); |
| 997 | g2 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4 + 4); |
| 998 | } |
| 999 | |
| 1000 | return g1==g2 ? -1 : g1; // if length is 0, return -1 |
| 1001 | } |
| 1002 | |
| 1003 | int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1) |
| 1004 | { |
| 1005 | int g = stbtt__GetGlyfOffset(info, glyph_index); |
| 1006 | if (g < 0) return 0; |
| 1007 | |
| 1008 | if (x0) *x0 = ttSHORT(info->data + g + 2); |
| 1009 | if (y0) *y0 = ttSHORT(info->data + g + 4); |
| 1010 | if (x1) *x1 = ttSHORT(info->data + g + 6); |
| 1011 | if (y1) *y1 = ttSHORT(info->data + g + 8); |
| 1012 | return 1; |
| 1013 | } |
| 1014 | |
| 1015 | int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1) |
| 1016 | { |
| 1017 | return stbtt_GetGlyphBox(info, stbtt_FindGlyphIndex(info,codepoint), x0,y0,x1,y1); |
| 1018 | } |
| 1019 | |
| 1020 | int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index) |
| 1021 | { |
| 1022 | stbtt_int16 numberOfContours; |
| 1023 | int g = stbtt__GetGlyfOffset(info, glyph_index); |
| 1024 | if (g < 0) return 1; |
| 1025 | numberOfContours = ttSHORT(info->data + g); |
| 1026 | return numberOfContours == 0; |
| 1027 | } |
| 1028 | |
| 1029 | static int stbtt__close_shape(stbtt_vertex *vertices, int num_vertices, int was_off, int start_off, |
| 1030 | stbtt_int32 sx, stbtt_int32 sy, stbtt_int32 scx, stbtt_int32 scy, stbtt_int32 cx, stbtt_int32 cy) |
| 1031 | { |
| 1032 | if (start_off) { |
| 1033 | if (was_off) |
| 1034 | stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+scx)>>1, (cy+scy)>>1, cx,cy); |
| 1035 | stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, sx,sy,scx,scy); |
| 1036 | } else { |
| 1037 | if (was_off) |
| 1038 | stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve,sx,sy,cx,cy); |
| 1039 | else |
| 1040 | stbtt_setvertex(&vertices[num_vertices++], STBTT_vline,sx,sy,0,0); |
| 1041 | } |
| 1042 | return num_vertices; |
| 1043 | } |
| 1044 | |
| 1045 | int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices) |
| 1046 | { |
| 1047 | stbtt_int16 numberOfContours; |
| 1048 | stbtt_uint8 *endPtsOfContours; |
| 1049 | stbtt_uint8 *data = info->data; |
| 1050 | stbtt_vertex *vertices=0; |
| 1051 | int num_vertices=0; |
| 1052 | int g = stbtt__GetGlyfOffset(info, glyph_index); |
| 1053 | |
| 1054 | *pvertices = NULL((void*)0); |
| 1055 | |
| 1056 | if (g < 0) return 0; |
| 1057 | |
| 1058 | numberOfContours = ttSHORT(data + g); |
| 1059 | |
| 1060 | if (numberOfContours > 0) { |
| 1061 | stbtt_uint8 flags=0,flagcount; |
| 1062 | stbtt_int32 ins, i,j=0,m,n, next_move, was_off=0, off, start_off=0; |
| 1063 | stbtt_int32 x,y,cx,cy,sx,sy, scx,scy; |
| 1064 | stbtt_uint8 *points; |
| 1065 | endPtsOfContours = (data + g + 10); |
| 1066 | ins = ttUSHORT(data + g + 10 + numberOfContours * 2); |
| 1067 | points = data + g + 10 + numberOfContours * 2 + 2 + ins; |
| 1068 | |
| 1069 | n = 1+ttUSHORT(endPtsOfContours + numberOfContours*2-2); |
| 1070 | |
| 1071 | m = n + 2*numberOfContours; // a loose bound on how many vertices we might need |
| 1072 | vertices = (stbtt_vertex *) STBTT_malloc(m * sizeof(vertices[0]), info->userdata)malloc(m * sizeof(vertices[0])); |
| 1073 | if (vertices == 0) |
| 1074 | return 0; |
| 1075 | |
| 1076 | next_move = 0; |
| 1077 | flagcount=0; |
| 1078 | |
| 1079 | // in first pass, we load uninterpreted data into the allocated array |
| 1080 | // above, shifted to the end of the array so we won't overwrite it when |
| 1081 | // we create our final data starting from the front |
| 1082 | |
| 1083 | off = m - n; // starting offset for uninterpreted data, regardless of how m ends up being calculated |
| 1084 | |
| 1085 | // first load flags |
| 1086 | |
| 1087 | for (i=0; i < n; ++i) { |
| 1088 | if (flagcount == 0) { |
| 1089 | flags = *points++; |
| 1090 | if (flags & 8) |
| 1091 | flagcount = *points++; |
| 1092 | } else |
| 1093 | --flagcount; |
| 1094 | vertices[off+i].type = flags; |
| 1095 | } |
| 1096 | |
| 1097 | // now load x coordinates |
| 1098 | x=0; |
| 1099 | for (i=0; i < n; ++i) { |
| 1100 | flags = vertices[off+i].type; |
| 1101 | if (flags & 2) { |
| 1102 | stbtt_int16 dx = *points++; |
| 1103 | x += (flags & 16) ? dx : -dx; // ??? |
| 1104 | } else { |
| 1105 | if (!(flags & 16)) { |
| 1106 | x = x + (stbtt_int16) (points[0]*256 + points[1]); |
| 1107 | points += 2; |
| 1108 | } |
| 1109 | } |
| 1110 | vertices[off+i].x = (stbtt_int16) x; |
| 1111 | } |
| 1112 | |
| 1113 | // now load y coordinates |
| 1114 | y=0; |
| 1115 | for (i=0; i < n; ++i) { |
| 1116 | flags = vertices[off+i].type; |
| 1117 | if (flags & 4) { |
| 1118 | stbtt_int16 dy = *points++; |
| 1119 | y += (flags & 32) ? dy : -dy; // ??? |
| 1120 | } else { |
| 1121 | if (!(flags & 32)) { |
| 1122 | y = y + (stbtt_int16) (points[0]*256 + points[1]); |
| 1123 | points += 2; |
| 1124 | } |
| 1125 | } |
| 1126 | vertices[off+i].y = (stbtt_int16) y; |
| 1127 | } |
| 1128 | |
| 1129 | // now convert them to our format |
| 1130 | num_vertices=0; |
| 1131 | sx = sy = cx = cy = scx = scy = 0; |
| 1132 | for (i=0; i < n; ++i) { |
| 1133 | flags = vertices[off+i].type; |
| 1134 | x = (stbtt_int16) vertices[off+i].x; |
| 1135 | y = (stbtt_int16) vertices[off+i].y; |
| 1136 | |
| 1137 | if (next_move == i) { |
| 1138 | if (i != 0) |
| 1139 | num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy); |
| 1140 | |
| 1141 | // now start the new one |
| 1142 | start_off = !(flags & 1); |
| 1143 | if (start_off) { |
| 1144 | // if we start off with an off-curve point, then when we need to find a point on the curve |
| 1145 | // where we can start, and we need to save some state for when we wraparound. |
| 1146 | scx = x; |
| 1147 | scy = y; |
| 1148 | if (!(vertices[off+i+1].type & 1)) { |
| 1149 | // next point is also a curve point, so interpolate an on-point curve |
| 1150 | sx = (x + (stbtt_int32) vertices[off+i+1].x) >> 1; |
| 1151 | sy = (y + (stbtt_int32) vertices[off+i+1].y) >> 1; |
| 1152 | } else { |
| 1153 | // otherwise just use the next point as our start point |
| 1154 | sx = (stbtt_int32) vertices[off+i+1].x; |
| 1155 | sy = (stbtt_int32) vertices[off+i+1].y; |
| 1156 | ++i; // we're using point i+1 as the starting point, so skip it |
| 1157 | } |
| 1158 | } else { |
| 1159 | sx = x; |
| 1160 | sy = y; |
| 1161 | } |
| 1162 | stbtt_setvertex(&vertices[num_vertices++], STBTT_vmove,sx,sy,0,0); |
| 1163 | was_off = 0; |
| 1164 | next_move = 1 + ttUSHORT(endPtsOfContours+j*2); |
| 1165 | ++j; |
| 1166 | } else { |
| 1167 | if (!(flags & 1)) { // if it's a curve |
| 1168 | if (was_off) // two off-curve control points in a row means interpolate an on-curve midpoint |
| 1169 | stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+x)>>1, (cy+y)>>1, cx, cy); |
| 1170 | cx = x; |
| 1171 | cy = y; |
| 1172 | was_off = 1; |
| 1173 | } else { |
| 1174 | if (was_off) |
| 1175 | stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, x,y, cx, cy); |
| 1176 | else |
| 1177 | stbtt_setvertex(&vertices[num_vertices++], STBTT_vline, x,y,0,0); |
| 1178 | was_off = 0; |
| 1179 | } |
| 1180 | } |
| 1181 | } |
| 1182 | num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy); |
| 1183 | } else if (numberOfContours == -1) { |
| 1184 | // Compound shapes. |
| 1185 | int more = 1; |
| 1186 | stbtt_uint8 *comp = data + g + 10; |
| 1187 | num_vertices = 0; |
| 1188 | vertices = 0; |
| 1189 | while (more) { |
| 1190 | stbtt_uint16 flags, gidx; |
| 1191 | int comp_num_verts = 0, i; |
| 1192 | stbtt_vertex *comp_verts = 0, *tmp = 0; |
| 1193 | float mtx[6] = {1,0,0,1,0,0}, m, n; |
| 1194 | |
| 1195 | flags = ttSHORT(comp); comp+=2; |
| 1196 | gidx = ttSHORT(comp); comp+=2; |
| 1197 | |
| 1198 | if (flags & 2) { // XY values |
| 1199 | if (flags & 1) { // shorts |
| 1200 | mtx[4] = ttSHORT(comp); comp+=2; |
| 1201 | mtx[5] = ttSHORT(comp); comp+=2; |
| 1202 | } else { |
| 1203 | mtx[4] = ttCHAR(comp)(* (stbtt_int8 *) (comp)); comp+=1; |
| 1204 | mtx[5] = ttCHAR(comp)(* (stbtt_int8 *) (comp)); comp+=1; |
| 1205 | } |
| 1206 | } |
| 1207 | else { |
| 1208 | // @TODO handle matching point |
| 1209 | STBTT_assert(0)((0) ? (void)0 : _assert("0", "src/siege/internal/stb/stb_truetype.h" , 1209)); |
| 1210 | } |
| 1211 | if (flags & (1<<3)) { // WE_HAVE_A_SCALE |
| 1212 | mtx[0] = mtx[3] = ttSHORT(comp)/16384.0f; comp+=2; |
| 1213 | mtx[1] = mtx[2] = 0; |
| 1214 | } else if (flags & (1<<6)) { // WE_HAVE_AN_X_AND_YSCALE |
| 1215 | mtx[0] = ttSHORT(comp)/16384.0f; comp+=2; |
| 1216 | mtx[1] = mtx[2] = 0; |
| 1217 | mtx[3] = ttSHORT(comp)/16384.0f; comp+=2; |
| 1218 | } else if (flags & (1<<7)) { // WE_HAVE_A_TWO_BY_TWO |
| 1219 | mtx[0] = ttSHORT(comp)/16384.0f; comp+=2; |
| 1220 | mtx[1] = ttSHORT(comp)/16384.0f; comp+=2; |
| 1221 | mtx[2] = ttSHORT(comp)/16384.0f; comp+=2; |
| 1222 | mtx[3] = ttSHORT(comp)/16384.0f; comp+=2; |
| 1223 | } |
| 1224 | |
| 1225 | // Find transformation scales. |
| 1226 | m = (float) sqrt(mtx[0]*mtx[0] + mtx[1]*mtx[1]); |
| 1227 | n = (float) sqrt(mtx[2]*mtx[2] + mtx[3]*mtx[3]); |
| 1228 | |
| 1229 | // Get indexed glyph. |
| 1230 | comp_num_verts = stbtt_GetGlyphShape(info, gidx, &comp_verts); |
| 1231 | if (comp_num_verts > 0) { |
| 1232 | // Transform vertices. |
| 1233 | for (i = 0; i < comp_num_verts; ++i) { |
| 1234 | stbtt_vertex* v = &comp_verts[i]; |
| 1235 | stbtt_vertex_typeshort x,y; |
| 1236 | x=v->x; y=v->y; |
| 1237 | v->x = (stbtt_vertex_typeshort)(m * (mtx[0]*x + mtx[2]*y + mtx[4])); |
| 1238 | v->y = (stbtt_vertex_typeshort)(n * (mtx[1]*x + mtx[3]*y + mtx[5])); |
| 1239 | x=v->cx; y=v->cy; |
| 1240 | v->cx = (stbtt_vertex_typeshort)(m * (mtx[0]*x + mtx[2]*y + mtx[4])); |
| 1241 | v->cy = (stbtt_vertex_typeshort)(n * (mtx[1]*x + mtx[3]*y + mtx[5])); |
| 1242 | } |
| 1243 | // Append vertices. |
| 1244 | tmp = (stbtt_vertex*)STBTT_malloc((num_vertices+comp_num_verts)*sizeof(stbtt_vertex), info->userdata)malloc((num_vertices+comp_num_verts)*sizeof(stbtt_vertex)); |
| 1245 | if (!tmp) { |
| 1246 | if (vertices) STBTT_free(vertices, info->userdata)free(vertices); |
| 1247 | if (comp_verts) STBTT_free(comp_verts, info->userdata)free(comp_verts); |
| 1248 | return 0; |
| 1249 | } |
| 1250 | if (num_vertices > 0) memcpy(tmp, vertices, num_vertices*sizeof(stbtt_vertex)); |
| 1251 | memcpy(tmp+num_vertices, comp_verts, comp_num_verts*sizeof(stbtt_vertex)); |
| 1252 | if (vertices) STBTT_free(vertices, info->userdata)free(vertices); |
| 1253 | vertices = tmp; |
| 1254 | STBTT_free(comp_verts, info->userdata)free(comp_verts); |
| 1255 | num_vertices += comp_num_verts; |
| 1256 | } |
| 1257 | // More components ? |
| 1258 | more = flags & (1<<5); |
| 1259 | } |
| 1260 | } else if (numberOfContours < 0) { |
| 1261 | // @TODO other compound variations? |
| 1262 | STBTT_assert(0)((0) ? (void)0 : _assert("0", "src/siege/internal/stb/stb_truetype.h" , 1262)); |
| 1263 | } else { |
| 1264 | // numberOfCounters == 0, do nothing |
| 1265 | } |
| 1266 | |
| 1267 | *pvertices = vertices; |
| 1268 | return num_vertices; |
| 1269 | } |
| 1270 | |
| 1271 | void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing) |
| 1272 | { |
| 1273 | stbtt_uint16 numOfLongHorMetrics = ttUSHORT(info->data+info->hhea + 34); |
| 1274 | if (glyph_index < numOfLongHorMetrics) { |
| 1275 | if (advanceWidth) *advanceWidth = ttSHORT(info->data + info->hmtx + 4*glyph_index); |
| 1276 | if (leftSideBearing) *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*glyph_index + 2); |
| 1277 | } else { |
| 1278 | if (advanceWidth) *advanceWidth = ttSHORT(info->data + info->hmtx + 4*(numOfLongHorMetrics-1)); |
| 1279 | if (leftSideBearing) *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*numOfLongHorMetrics + 2*(glyph_index - numOfLongHorMetrics)); |
| 1280 | } |
| 1281 | } |
| 1282 | |
| 1283 | int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2) |
| 1284 | { |
| 1285 | stbtt_uint8 *data = info->data + info->kern; |
| 1286 | stbtt_uint32 needle, straw; |
| 1287 | int l, r, m; |
| 1288 | |
| 1289 | // we only look at the first table. it must be 'horizontal' and format 0. |
| 1290 | if (!info->kern) |
| 1291 | return 0; |
| 1292 | if (ttUSHORT(data+2) < 1) // number of tables, need at least 1 |
| 1293 | return 0; |
| 1294 | if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format |
| 1295 | return 0; |
| 1296 | |
| 1297 | l = 0; |
| 1298 | r = ttUSHORT(data+10) - 1; |
| 1299 | needle = glyph1 << 16 | glyph2; |
| 1300 | while (l <= r) { |
| 1301 | m = (l + r) >> 1; |
| 1302 | straw = ttULONG(data+18+(m*6)); // note: unaligned read |
| 1303 | if (needle < straw) |
| 1304 | r = m - 1; |
| 1305 | else if (needle > straw) |
| 1306 | l = m + 1; |
| 1307 | else |
| 1308 | return ttSHORT(data+22+(m*6)); |
| 1309 | } |
| 1310 | return 0; |
| 1311 | } |
| 1312 | |
| 1313 | int stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2) |
| 1314 | { |
| 1315 | if (!info->kern) // if no kerning table, don't waste time looking up both codepoint->glyphs |
| 1316 | return 0; |
| 1317 | return stbtt_GetGlyphKernAdvance(info, stbtt_FindGlyphIndex(info,ch1), stbtt_FindGlyphIndex(info,ch2)); |
| 1318 | } |
| 1319 | |
| 1320 | void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing) |
| 1321 | { |
| 1322 | stbtt_GetGlyphHMetrics(info, stbtt_FindGlyphIndex(info,codepoint), advanceWidth, leftSideBearing); |
| 1323 | } |
| 1324 | |
| 1325 | void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap) |
| 1326 | { |
| 1327 | if (ascent ) *ascent = ttSHORT(info->data+info->hhea + 4); |
| 1328 | if (descent) *descent = ttSHORT(info->data+info->hhea + 6); |
| 1329 | if (lineGap) *lineGap = ttSHORT(info->data+info->hhea + 8); |
| 1330 | } |
| 1331 | |
| 1332 | void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1) |
| 1333 | { |
| 1334 | *x0 = ttSHORT(info->data + info->head + 36); |
| 1335 | *y0 = ttSHORT(info->data + info->head + 38); |
| 1336 | *x1 = ttSHORT(info->data + info->head + 40); |
| 1337 | *y1 = ttSHORT(info->data + info->head + 42); |
| 1338 | } |
| 1339 | |
| 1340 | float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float height) |
| 1341 | { |
| 1342 | int fheight = ttSHORT(info->data + info->hhea + 4) - ttSHORT(info->data + info->hhea + 6); |
| 1343 | return (float) height / fheight; |
| 1344 | } |
| 1345 | |
| 1346 | float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels) |
| 1347 | { |
| 1348 | int unitsPerEm = ttUSHORT(info->data + info->head + 18); |
| 1349 | return pixels / unitsPerEm; |
| 1350 | } |
| 1351 | |
| 1352 | void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v) |
| 1353 | { |
| 1354 | STBTT_free(v, info->userdata)free(v); |
| 1355 | } |
| 1356 | |
| 1357 | ////////////////////////////////////////////////////////////////////////////// |
| 1358 | // |
| 1359 | // antialiasing software rasterizer |
| 1360 | // |
| 1361 | |
| 1362 | void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1) |
| 1363 | { |
| 1364 | int x0,y0,x1,y1; |
| 1365 | if (!stbtt_GetGlyphBox(font, glyph, &x0,&y0,&x1,&y1)) |
| 1366 | x0=y0=x1=y1=0; // e.g. space character |
| 1367 | // now move to integral bboxes (treating pixels as little squares, what pixels get touched)? |
| 1368 | if (ix0) *ix0 = STBTT_ifloor(x0 * scale_x + shift_x)((int) floor(x0 * scale_x + shift_x)); |
| 1369 | if (iy0) *iy0 = -STBTT_iceil (y1 * scale_y + shift_y)((int) ceil(y1 * scale_y + shift_y)); |
| 1370 | if (ix1) *ix1 = STBTT_iceil (x1 * scale_x + shift_x)((int) ceil(x1 * scale_x + shift_x)); |
| 1371 | if (iy1) *iy1 = -STBTT_ifloor(y0 * scale_y + shift_y)((int) floor(y0 * scale_y + shift_y)); |
| 1372 | } |
| 1373 | void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1) |
| 1374 | { |
| 1375 | stbtt_GetGlyphBitmapBoxSubpixel(font, glyph, scale_x, scale_y,0.0f,0.0f, ix0, iy0, ix1, iy1); |
| 1376 | } |
| 1377 | |
| 1378 | void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1) |
| 1379 | { |
| 1380 | stbtt_GetGlyphBitmapBoxSubpixel(font, stbtt_FindGlyphIndex(font,codepoint), scale_x, scale_y,shift_x,shift_y, ix0,iy0,ix1,iy1); |
| 1381 | } |
| 1382 | |
| 1383 | void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1) |
| 1384 | { |
| 1385 | stbtt_GetCodepointBitmapBoxSubpixel(font, codepoint, scale_x, scale_y,0.0f,0.0f, ix0,iy0,ix1,iy1); |
| 1386 | } |
| 1387 | |
| 1388 | typedef struct stbtt__edge { |
| 1389 | float x0,y0, x1,y1; |
| 1390 | int invert; |
| 1391 | } stbtt__edge; |
| 1392 | |
| 1393 | typedef struct stbtt__active_edge |
| 1394 | { |
| 1395 | int x,dx; |
| 1396 | float ey; |
| 1397 | struct stbtt__active_edge *next; |
| 1398 | int valid; |
| 1399 | } stbtt__active_edge; |
| 1400 | |
| 1401 | #define FIXSHIFT10 10 |
| 1402 | #define FIX(1 << 10) (1 << FIXSHIFT10) |
| 1403 | #define FIXMASK((1 << 10)-1) (FIX(1 << 10)-1) |
| 1404 | |
| 1405 | static stbtt__active_edge *new_active(stbtt__edge *e, int off_x, float start_point, void *userdata) |
| 1406 | { |
| 1407 | stbtt__active_edge *z = (stbtt__active_edge *) STBTT_malloc(sizeof(*z), userdata)malloc(sizeof(*z)); // @TODO: make a pool of these!!! |
| 1408 | float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0); |
| 1409 | STBTT_assert(e->y0 <= start_point)((e->y0 <= start_point) ? (void)0 : _assert("e->y0 <= start_point" , "src/siege/internal/stb/stb_truetype.h", 1409)); |
| 1410 | if (!z) return z; |
| 1411 | // round dx down to avoid going too far |
| 1412 | if (dxdy < 0) |
| 1413 | z->dx = -STBTT_ifloor(FIX * -dxdy)((int) floor((1 << 10) * -dxdy)); |
| 1414 | else |
| 1415 | z->dx = STBTT_ifloor(FIX * dxdy)((int) floor((1 << 10) * dxdy)); |
| 1416 | z->x = STBTT_ifloor(FIX * (e->x0 + dxdy * (start_point - e->y0)))((int) floor((1 << 10) * (e->x0 + dxdy * (start_point - e->y0)))); |
| 1417 | z->x -= off_x * FIX(1 << 10); |
| 1418 | z->ey = e->y1; |
| 1419 | z->next = 0; |
| 1420 | z->valid = e->invert ? 1 : -1; |
| 1421 | return z; |
| 1422 | } |
| 1423 | |
| 1424 | // note: this routine clips fills that extend off the edges... ideally this |
| 1425 | // wouldn't happen, but it could happen if the truetype glyph bounding boxes |
| 1426 | // are wrong, or if the user supplies a too-small bitmap |
| 1427 | static void stbtt__fill_active_edges(unsigned char *scanline, int len, stbtt__active_edge *e, int max_weight) |
| 1428 | { |
| 1429 | // non-zero winding fill |
| 1430 | int x0=0, w=0; |
| 1431 | |
| 1432 | while (e) { |
| 1433 | if (w == 0) { |
| 1434 | // if we're currently at zero, we need to record the edge start point |
| 1435 | x0 = e->x; w += e->valid; |
| 1436 | } else { |
| 1437 | int x1 = e->x; w += e->valid; |
| 1438 | // if we went to zero, we need to draw |
| 1439 | if (w == 0) { |
| 1440 | int i = x0 >> FIXSHIFT10; |
| 1441 | int j = x1 >> FIXSHIFT10; |
| 1442 | |
| 1443 | if (i < len && j >= 0) { |
| 1444 | if (i == j) { |
| 1445 | // x0,x1 are the same pixel, so compute combined coverage |
| 1446 | scanline[i] = scanline[i] + (stbtt_uint8) ((x1 - x0) * max_weight >> FIXSHIFT10); |
| 1447 | } else { |
| 1448 | if (i >= 0) // add antialiasing for x0 |
| 1449 | scanline[i] = scanline[i] + (stbtt_uint8) (((FIX(1 << 10) - (x0 & FIXMASK((1 << 10)-1))) * max_weight) >> FIXSHIFT10); |
| 1450 | else |
| 1451 | i = -1; // clip |
| 1452 | |
| 1453 | if (j < len) // add antialiasing for x1 |
| 1454 | scanline[j] = scanline[j] + (stbtt_uint8) (((x1 & FIXMASK((1 << 10)-1)) * max_weight) >> FIXSHIFT10); |
| 1455 | else |
| 1456 | j = len; // clip |
| 1457 | |
| 1458 | for (++i; i < j; ++i) // fill pixels between x0 and x1 |
| 1459 | scanline[i] = scanline[i] + (stbtt_uint8) max_weight; |
| 1460 | } |
| 1461 | } |
| 1462 | } |
| 1463 | } |
| 1464 | |
| 1465 | e = e->next; |
| 1466 | } |
| 1467 | } |
| 1468 | |
| 1469 | static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata) |
| 1470 | { |
| 1471 | stbtt__active_edge *active = NULL((void*)0); |
| 1472 | int y,j=0; |
| 1473 | int max_weight = (255 / vsubsample); // weight per vertical scanline |
| 1474 | int s; // vertical subsample index |
| 1475 | unsigned char scanline_data[512], *scanline; |
| 1476 | |
| 1477 | if (result->w > 512) |
| 1478 | scanline = (unsigned char *) STBTT_malloc(result->w, userdata)malloc(result->w); |
| 1479 | else |
| 1480 | scanline = scanline_data; |
| 1481 | |
| 1482 | y = off_y * vsubsample; |
| 1483 | e[n].y0 = (off_y + result->h) * (float) vsubsample + 1; |
| 1484 | |
| 1485 | while (j < result->h) { |
| 1486 | STBTT_memsetmemset(scanline, 0, result->w); |
| 1487 | for (s=0; s < vsubsample; ++s) { |
| 1488 | // find center of pixel for this scanline |
| 1489 | float scan_y = y + 0.5f; |
| 1490 | stbtt__active_edge **step = &active; |
| 1491 | |
| 1492 | // update all active edges; |
| 1493 | // remove all active edges that terminate before the center of this scanline |
| 1494 | while (*step) { |
| 1495 | stbtt__active_edge * z = *step; |
| 1496 | if (z->ey <= scan_y) { |
| 1497 | *step = z->next; // delete from list |
| 1498 | STBTT_assert(z->valid)((z->valid) ? (void)0 : _assert("z->valid", "src/siege/internal/stb/stb_truetype.h" , 1498)); |
| 1499 | z->valid = 0; |
| 1500 | STBTT_free(z, userdata)free(z); |
| 1501 | } else { |
| 1502 | z->x += z->dx; // advance to position for current scanline |
| 1503 | step = &((*step)->next); // advance through list |
| 1504 | } |
| 1505 | } |
| 1506 | |
| 1507 | // resort the list if needed |
| 1508 | for(;;) { |
| 1509 | int changed=0; |
| 1510 | step = &active; |
| 1511 | while (*step && (*step)->next) { |
| 1512 | if ((*step)->x > (*step)->next->x) { |
| 1513 | stbtt__active_edge *t = *step; |
| 1514 | stbtt__active_edge *q = t->next; |
| 1515 | |
| 1516 | t->next = q->next; |
| 1517 | q->next = t; |
| 1518 | *step = q; |
| 1519 | changed = 1; |
| 1520 | } |
| 1521 | step = &(*step)->next; |
| 1522 | } |
| 1523 | if (!changed) break; |
| 1524 | } |
| 1525 | |
| 1526 | // insert all edges that start before the center of this scanline -- omit ones that also end on this scanline |
| 1527 | while (e->y0 <= scan_y) { |
| 1528 | if (e->y1 > scan_y) { |
| 1529 | stbtt__active_edge *z = new_active(e, off_x, scan_y, userdata); |
| 1530 | // find insertion point |
| 1531 | if (active == NULL((void*)0)) |
| 1532 | active = z; |
| 1533 | else if (z->x < active->x) { |
| 1534 | // insert at front |
| 1535 | z->next = active; |
| 1536 | active = z; |
| 1537 | } else { |
| 1538 | // find thing to insert AFTER |
| 1539 | stbtt__active_edge *p = active; |
| 1540 | while (p->next && p->next->x < z->x) |
| 1541 | p = p->next; |
| 1542 | // at this point, p->next->x is NOT < z->x |
| 1543 | z->next = p->next; |
| 1544 | p->next = z; |
| 1545 | } |
| 1546 | } |
| 1547 | ++e; |
| 1548 | } |
| 1549 | |
| 1550 | // now process all active edges in XOR fashion |
| 1551 | if (active) |
| 1552 | stbtt__fill_active_edges(scanline, result->w, active, max_weight); |
| 1553 | |
| 1554 | ++y; |
| 1555 | } |
| 1556 | STBTT_memcpymemcpy(result->pixels + j * result->stride, scanline, result->w); |
| 1557 | ++j; |
| 1558 | } |
| 1559 | |
| 1560 | while (active) { |
| 1561 | stbtt__active_edge *z = active; |
| 1562 | active = active->next; |
| 1563 | STBTT_free(z, userdata)free(z); |
| 1564 | } |
| 1565 | |
| 1566 | if (scanline != scanline_data) |
| 1567 | STBTT_free(scanline, userdata)free(scanline); |
| 1568 | } |
| 1569 | |
| 1570 | static int stbtt__edge_compare(const void *p, const void *q) |
| 1571 | { |
| 1572 | stbtt__edge *a = (stbtt__edge *) p; |
| 1573 | stbtt__edge *b = (stbtt__edge *) q; |
| 1574 | |
| 1575 | if (a->y0 < b->y0) return -1; |
| 1576 | if (a->y0 > b->y0) return 1; |
| 1577 | return 0; |
| 1578 | } |
| 1579 | |
| 1580 | typedef struct |
| 1581 | { |
| 1582 | float x,y; |
| 1583 | } stbtt__point; |
| 1584 | |
| 1585 | static void stbtt__rasterize(stbtt__bitmap *result, stbtt__point *pts, int *wcount, int windings, float scale_x, float scale_y, float shift_x, float shift_y, int off_x, int off_y, int invert, void *userdata) |
| 1586 | { |
| 1587 | float y_scale_inv = invert ? -scale_y : scale_y; |
| 1588 | stbtt__edge *e; |
| 1589 | int n,i,j,k,m; |
| 1590 | int vsubsample = result->h < 8 ? 15 : 5; |
| 1591 | // vsubsample should divide 255 evenly; otherwise we won't reach full opacity |
| 1592 | |
| 1593 | // now we have to blow out the windings into explicit edge lists |
| 1594 | n = 0; |
| 1595 | for (i=0; i < windings; ++i) |
| 1596 | n += wcount[i]; |
| 1597 | |
| 1598 | e = (stbtt__edge *) STBTT_malloc(sizeof(*e) * (n+1), userdata)malloc(sizeof(*e) * (n+1)); // add an extra one as a sentinel |
| 1599 | if (e == 0) return; |
| 1600 | n = 0; |
| 1601 | |
| 1602 | m=0; |
| 1603 | for (i=0; i < windings; ++i) { |
| 1604 | stbtt__point *p = pts + m; |
| 1605 | m += wcount[i]; |
| 1606 | j = wcount[i]-1; |
| 1607 | for (k=0; k < wcount[i]; j=k++) { |
| 1608 | int a=k,b=j; |
| 1609 | // skip the edge if horizontal |
| 1610 | if (p[j].y == p[k].y) |
| 1611 | continue; |
| 1612 | // add edge from j to k to the list |
| 1613 | e[n].invert = 0; |
| 1614 | if (invert ? p[j].y > p[k].y : p[j].y < p[k].y) { |
| 1615 | e[n].invert = 1; |
| 1616 | a=j,b=k; |
| 1617 | } |
| 1618 | e[n].x0 = p[a].x * scale_x + shift_x; |
| 1619 | e[n].y0 = p[a].y * y_scale_inv * vsubsample + shift_y; |
| 1620 | e[n].x1 = p[b].x * scale_x + shift_x; |
| 1621 | e[n].y1 = p[b].y * y_scale_inv * vsubsample + shift_y; |
| 1622 | ++n; |
| 1623 | } |
| 1624 | } |
| 1625 | |
| 1626 | // now sort the edges by their highest point (should snap to integer, and then by x) |
| 1627 | STBTT_sort(e, n, sizeof(e[0]), stbtt__edge_compare)qsort(e,n,sizeof(e[0]),stbtt__edge_compare); |
| 1628 | |
| 1629 | // now, traverse the scanlines and find the intersections on each scanline, use xor winding rule |
| 1630 | stbtt__rasterize_sorted_edges(result, e, n, vsubsample, off_x, off_y, userdata); |
| 1631 | |
| 1632 | STBTT_free(e, userdata)free(e); |
| 1633 | } |
| 1634 | |
| 1635 | static void stbtt__add_point(stbtt__point *points, int n, float x, float y) |
| 1636 | { |
| 1637 | if (!points) return; // during first pass, it's unallocated |
| 1638 | points[n].x = x; |
| 1639 | points[n].y = y; |
| 1640 | } |
| 1641 | |
| 1642 | // tesselate until threshhold p is happy... @TODO warped to compensate for non-linear stretching |
| 1643 | static int stbtt__tesselate_curve(stbtt__point *points, int *num_points, float x0, float y0, float x1, float y1, float x2, float y2, float objspace_flatness_squared, int n) |
| 1644 | { |
| 1645 | // midpoint |
| 1646 | float mx = (x0 + 2*x1 + x2)/4; |
| 1647 | float my = (y0 + 2*y1 + y2)/4; |
| 1648 | // versus directly drawn line |
| 1649 | float dx = (x0+x2)/2 - mx; |
| 1650 | float dy = (y0+y2)/2 - my; |
| 1651 | if (n > 16) // 65536 segments on one curve better be enough! |
| 1652 | return 1; |
| 1653 | if (dx*dx+dy*dy > objspace_flatness_squared) { // half-pixel error allowed... need to be smaller if AA |
| 1654 | stbtt__tesselate_curve(points, num_points, x0,y0, (x0+x1)/2.0f,(y0+y1)/2.0f, mx,my, objspace_flatness_squared,n+1); |
| 1655 | stbtt__tesselate_curve(points, num_points, mx,my, (x1+x2)/2.0f,(y1+y2)/2.0f, x2,y2, objspace_flatness_squared,n+1); |
| 1656 | } else { |
| 1657 | stbtt__add_point(points, *num_points,x2,y2); |
| 1658 | *num_points = *num_points+1; |
| 1659 | } |
| 1660 | return 1; |
| 1661 | } |
| 1662 | |
| 1663 | // returns number of contours |
| 1664 | stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts, float objspace_flatness, int **contour_lengths, int *num_contours, void *userdata) |
| 1665 | { |
| 1666 | stbtt__point *points=0; |
| 1667 | int num_points=0; |
| 1668 | |
| 1669 | float objspace_flatness_squared = objspace_flatness * objspace_flatness; |
| 1670 | int i,n=0,start=0, pass; |
| 1671 | |
| 1672 | // count how many "moves" there are to get the contour count |
| 1673 | for (i=0; i < num_verts; ++i) |
| 1674 | if (vertices[i].type == STBTT_vmove) |
| 1675 | ++n; |
| 1676 | |
| 1677 | *num_contours = n; |
| 1678 | if (n == 0) return 0; |
| 1679 | |
| 1680 | *contour_lengths = (int *) STBTT_malloc(sizeof(**contour_lengths) * n, userdata)malloc(sizeof(**contour_lengths) * n); |
| 1681 | |
| 1682 | if (*contour_lengths == 0) { |
| 1683 | *num_contours = 0; |
| 1684 | return 0; |
| 1685 | } |
| 1686 | |
| 1687 | // make two passes through the points so we don't need to realloc |
| 1688 | for (pass=0; pass < 2; ++pass) { |
| 1689 | float x=0,y=0; |
| 1690 | if (pass == 1) { |
| 1691 | points = (stbtt__point *) STBTT_malloc(num_points * sizeof(points[0]), userdata)malloc(num_points * sizeof(points[0])); |
| 1692 | if (points == NULL((void*)0)) goto error; |
| 1693 | } |
| 1694 | num_points = 0; |
| 1695 | n= -1; |
| 1696 | for (i=0; i < num_verts; ++i) { |
| 1697 | switch (vertices[i].type) { |
| 1698 | case STBTT_vmove: |
| 1699 | // start the next contour |
| 1700 | if (n >= 0) |
| 1701 | (*contour_lengths)[n] = num_points - start; |
| 1702 | ++n; |
| 1703 | start = num_points; |
| 1704 | |
| 1705 | x = vertices[i].x, y = vertices[i].y; |
| 1706 | stbtt__add_point(points, num_points++, x,y); |
| 1707 | break; |
| 1708 | case STBTT_vline: |
| 1709 | x = vertices[i].x, y = vertices[i].y; |
| 1710 | stbtt__add_point(points, num_points++, x, y); |
| 1711 | break; |
| 1712 | case STBTT_vcurve: |
| 1713 | stbtt__tesselate_curve(points, &num_points, x,y, |
| 1714 | vertices[i].cx, vertices[i].cy, |
| 1715 | vertices[i].x, vertices[i].y, |
| 1716 | objspace_flatness_squared, 0); |
| 1717 | x = vertices[i].x, y = vertices[i].y; |
| 1718 | break; |
| 1719 | } |
| 1720 | } |
| 1721 | (*contour_lengths)[n] = num_points - start; |
| 1722 | } |
| 1723 | |
| 1724 | return points; |
| 1725 | error: |
| 1726 | STBTT_free(points, userdata)free(points); |
| 1727 | STBTT_free(*contour_lengths, userdata)free(*contour_lengths); |
| 1728 | *contour_lengths = 0; |
| 1729 | *num_contours = 0; |
| 1730 | return NULL((void*)0); |
| 1731 | } |
| 1732 | |
| 1733 | void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata) |
| 1734 | { |
| 1735 | float scale = scale_x > scale_y ? scale_y : scale_x; |
| 1736 | int winding_count, *winding_lengths; |
| 1737 | stbtt__point *windings = stbtt_FlattenCurves(vertices, num_verts, flatness_in_pixels / scale, &winding_lengths, &winding_count, userdata); |
| 1738 | if (windings) { |
| 1739 | stbtt__rasterize(result, windings, winding_lengths, winding_count, scale_x, scale_y, shift_x, shift_y, x_off, y_off, invert, userdata); |
| 1740 | STBTT_free(winding_lengths, userdata)free(winding_lengths); |
| 1741 | STBTT_free(windings, userdata)free(windings); |
| 1742 | } |
| 1743 | } |
| 1744 | |
| 1745 | void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata) |
| 1746 | { |
| 1747 | STBTT_free(bitmap, userdata)free(bitmap); |
| 1748 | } |
| 1749 | |
| 1750 | unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff) |
| 1751 | { |
| 1752 | int ix0,iy0,ix1,iy1; |
| 1753 | stbtt__bitmap gbm; |
| 1754 | stbtt_vertex *vertices; |
| 1755 | int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices); |
| 1756 | |
| 1757 | if (scale_x == 0) scale_x = scale_y; |
| 1758 | if (scale_y == 0) { |
| 1759 | if (scale_x == 0) return NULL((void*)0); |
| 1760 | scale_y = scale_x; |
| 1761 | } |
| 1762 | |
| 1763 | stbtt_GetGlyphBitmapBox(info, glyph, scale_x, scale_y, &ix0,&iy0,&ix1,&iy1); |
| 1764 | |
| 1765 | // now we get the size |
| 1766 | gbm.w = (ix1 - ix0); |
| 1767 | gbm.h = (iy1 - iy0); |
| 1768 | gbm.pixels = NULL((void*)0); // in case we error |
| 1769 | |
| 1770 | if (width ) *width = gbm.w; |
| 1771 | if (height) *height = gbm.h; |
| 1772 | if (xoff ) *xoff = ix0; |
| 1773 | if (yoff ) *yoff = iy0; |
| 1774 | |
| 1775 | if (gbm.w && gbm.h) { |
| 1776 | gbm.pixels = (unsigned char *) STBTT_malloc(gbm.w * gbm.h, info->userdata)malloc(gbm.w * gbm.h); |
| 1777 | if (gbm.pixels) { |
| 1778 | gbm.stride = gbm.w; |
| 1779 | |
| 1780 | stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0, iy0, 1, info->userdata); |
| 1781 | } |
| 1782 | } |
| 1783 | STBTT_free(vertices, info->userdata)free(vertices); |
| 1784 | return gbm.pixels; |
| 1785 | } |
| 1786 | |
| 1787 | unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff) |
| 1788 | { |
| 1789 | return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y, 0.0f, 0.0f, glyph, width, height, xoff, yoff); |
| 1790 | } |
| 1791 | |
| 1792 | void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph) |
| 1793 | { |
| 1794 | int ix0,iy0; |
| 1795 | stbtt_vertex *vertices; |
| 1796 | int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices); |
| 1797 | stbtt__bitmap gbm; |
| 1798 | |
| 1799 | stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,0,0); |
| 1800 | gbm.pixels = output; |
| 1801 | gbm.w = out_w; |
| 1802 | gbm.h = out_h; |
| 1803 | gbm.stride = out_stride; |
| 1804 | |
| 1805 | if (gbm.w && gbm.h) |
| 1806 | stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0,iy0, 1, info->userdata); |
| 1807 | |
| 1808 | STBTT_free(vertices, info->userdata)free(vertices); |
| 1809 | } |
| 1810 | |
| 1811 | void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph) |
| 1812 | { |
| 1813 | stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, glyph); |
| 1814 | } |
| 1815 | |
| 1816 | unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff) |
| 1817 | { |
| 1818 | return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y,shift_x,shift_y, stbtt_FindGlyphIndex(info,codepoint), width,height,xoff,yoff); |
| 1819 | } |
| 1820 | |
| 1821 | void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint) |
| 1822 | { |
| 1823 | stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, shift_x, shift_y, stbtt_FindGlyphIndex(info,codepoint)); |
| 1824 | } |
| 1825 | |
| 1826 | unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff) |
| 1827 | { |
| 1828 | return stbtt_GetCodepointBitmapSubpixel(info, scale_x, scale_y, 0.0f,0.0f, codepoint, width,height,xoff,yoff); |
| 1829 | } |
| 1830 | |
| 1831 | void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint) |
| 1832 | { |
| 1833 | stbtt_MakeCodepointBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, codepoint); |
| 1834 | } |
| 1835 | |
| 1836 | ////////////////////////////////////////////////////////////////////////////// |
| 1837 | // |
| 1838 | // bitmap baking |
| 1839 | // |
| 1840 | // This is SUPER-CRAPPY packing to keep source code small |
| 1841 | |
| 1842 | extern int stbtt_BakeFontBitmap(const unsigned char *data, int offset, // font location (use offset=0 for plain .ttf) |
| 1843 | float pixel_height, // height of font in pixels |
| 1844 | unsigned char *pixels, int pw, int ph, // bitmap to be filled in |
| 1845 | int first_char, int num_chars, // characters to bake |
| 1846 | stbtt_bakedchar *chardata) |
| 1847 | { |
| 1848 | float scale; |
| 1849 | int x,y,bottom_y, i; |
| 1850 | stbtt_fontinfo f; |
| 1851 | stbtt_InitFont(&f, data, offset); |
| 1852 | STBTT_memsetmemset(pixels, 0, pw*ph); // background of 0 around pixels |
| 1853 | x=y=1; |
| 1854 | bottom_y = 1; |
| 1855 | |
| 1856 | scale = stbtt_ScaleForPixelHeight(&f, pixel_height); |
| 1857 | |
| 1858 | for (i=0; i < num_chars; ++i) { |
| 1859 | int advance, lsb, x0,y0,x1,y1,gw,gh; |
| 1860 | int g = stbtt_FindGlyphIndex(&f, first_char + i); |
| 1861 | stbtt_GetGlyphHMetrics(&f, g, &advance, &lsb); |
| 1862 | stbtt_GetGlyphBitmapBox(&f, g, scale,scale, &x0,&y0,&x1,&y1); |
| 1863 | gw = x1-x0; |
| 1864 | gh = y1-y0; |
| 1865 | if (x + gw + 1 >= pw) |
| 1866 | y = bottom_y, x = 1; // advance to next row |
| 1867 | if (y + gh + 1 >= ph) // check if it fits vertically AFTER potentially moving to next row |
| 1868 | return -i; |
| 1869 | STBTT_assert(x+gw < pw)((x+gw < pw) ? (void)0 : _assert("x+gw < pw", "src/siege/internal/stb/stb_truetype.h" , 1869)); |
| 1870 | STBTT_assert(y+gh < ph)((y+gh < ph) ? (void)0 : _assert("y+gh < ph", "src/siege/internal/stb/stb_truetype.h" , 1870)); |
| 1871 | stbtt_MakeGlyphBitmap(&f, pixels+x+y*pw, gw,gh,pw, scale,scale, g); |
| 1872 | chardata[i].x0 = (stbtt_int16) x; |
| 1873 | chardata[i].y0 = (stbtt_int16) y; |
| 1874 | chardata[i].x1 = (stbtt_int16) (x + gw); |
| 1875 | chardata[i].y1 = (stbtt_int16) (y + gh); |
| 1876 | chardata[i].xadvance = scale * advance; |
| 1877 | chardata[i].xoff = (float) x0; |
| 1878 | chardata[i].yoff = (float) y0; |
| 1879 | x = x + gw + 2; |
| 1880 | if (y+gh+2 > bottom_y) |
| 1881 | bottom_y = y+gh+2; |
| 1882 | } |
| 1883 | return bottom_y; |
| 1884 | } |
| 1885 | |
| 1886 | void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int opengl_fillrule) |
| 1887 | { |
| 1888 | float d3d_bias = opengl_fillrule ? 0 : -0.5f; |
| 1889 | float ipw = 1.0f / pw, iph = 1.0f / ph; |
| 1890 | stbtt_bakedchar *b = chardata + char_index; |
| 1891 | int round_x = STBTT_ifloor((*xpos + b->xoff) + 0.5)((int) floor((*xpos + b->xoff) + 0.5)); |
| 1892 | int round_y = STBTT_ifloor((*ypos + b->yoff) + 0.5)((int) floor((*ypos + b->yoff) + 0.5)); |
| 1893 | |
| 1894 | q->x0 = round_x + d3d_bias; |
| 1895 | q->y0 = round_y + d3d_bias; |
| 1896 | q->x1 = round_x + b->x1 - b->x0 + d3d_bias; |
| 1897 | q->y1 = round_y + b->y1 - b->y0 + d3d_bias; |
| 1898 | |
| 1899 | q->s0 = b->x0 * ipw; |
| 1900 | q->t0 = b->y0 * iph; |
| 1901 | q->s1 = b->x1 * ipw; |
| 1902 | q->t1 = b->y1 * iph; |
| 1903 | |
| 1904 | *xpos += b->xadvance; |
| 1905 | } |
| 1906 | |
| 1907 | ////////////////////////////////////////////////////////////////////////////// |
| 1908 | // |
| 1909 | // font name matching -- recommended not to use this |
| 1910 | // |
| 1911 | |
| 1912 | // check if a utf8 string contains a prefix which is the utf16 string; if so return length of matching utf8 string |
| 1913 | static stbtt_int32 stbtt__CompareUTF8toUTF16_bigendian_prefix(const stbtt_uint8 *s1, stbtt_int32 len1, const stbtt_uint8 *s2, stbtt_int32 len2) |
| 1914 | { |
| 1915 | stbtt_int32 i=0; |
| 1916 | |
| 1917 | // convert utf16 to utf8 and compare the results while converting |
| 1918 | while (len2) { |
| 1919 | stbtt_uint16 ch = s2[0]*256 + s2[1]; |
| 1920 | if (ch < 0x80) { |
| 1921 | if (i >= len1) return -1; |
| 1922 | if (s1[i++] != ch) return -1; |
| 1923 | } else if (ch < 0x800) { |
| 1924 | if (i+1 >= len1) return -1; |
| 1925 | if (s1[i++] != 0xc0 + (ch >> 6)) return -1; |
| 1926 | if (s1[i++] != 0x80 + (ch & 0x3f)) return -1; |
| 1927 | } else if (ch >= 0xd800 && ch < 0xdc00) { |
| 1928 | stbtt_uint32 c; |
| 1929 | stbtt_uint16 ch2 = s2[2]*256 + s2[3]; |
| 1930 | if (i+3 >= len1) return -1; |
| 1931 | c = ((ch - 0xd800) << 10) + (ch2 - 0xdc00) + 0x10000; |
| 1932 | if (s1[i++] != 0xf0 + (c >> 18)) return -1; |
| 1933 | if (s1[i++] != 0x80 + ((c >> 12) & 0x3f)) return -1; |
| 1934 | if (s1[i++] != 0x80 + ((c >> 6) & 0x3f)) return -1; |
| 1935 | if (s1[i++] != 0x80 + ((c ) & 0x3f)) return -1; |
| 1936 | s2 += 2; // plus another 2 below |
| 1937 | len2 -= 2; |
| 1938 | } else if (ch >= 0xdc00 && ch < 0xe000) { |
| 1939 | return -1; |
| 1940 | } else { |
| 1941 | if (i+2 >= len1) return -1; |
| 1942 | if (s1[i++] != 0xe0 + (ch >> 12)) return -1; |
| 1943 | if (s1[i++] != 0x80 + ((ch >> 6) & 0x3f)) return -1; |
| 1944 | if (s1[i++] != 0x80 + ((ch ) & 0x3f)) return -1; |
| 1945 | } |
| 1946 | s2 += 2; |
| 1947 | len2 -= 2; |
| 1948 | } |
| 1949 | return i; |
| 1950 | } |
| 1951 | |
| 1952 | int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2) |
| 1953 | { |
| 1954 | return len1 == stbtt__CompareUTF8toUTF16_bigendian_prefix((const stbtt_uint8*) s1, len1, (const stbtt_uint8*) s2, len2); |
| 1955 | } |
| 1956 | |
| 1957 | // returns results in whatever encoding you request... but note that 2-byte encodings |
| 1958 | // will be BIG-ENDIAN... use stbtt_CompareUTF8toUTF16_bigendian() to compare |
| 1959 | const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID) |
| 1960 | { |
| 1961 | stbtt_int32 i,count,stringOffset; |
| 1962 | stbtt_uint8 *fc = font->data; |
| 1963 | stbtt_uint32 offset = font->fontstart; |
| 1964 | stbtt_uint32 nm = stbtt__find_table(fc, offset, "name"); |
| 1965 | if (!nm) return NULL((void*)0); |
| 1966 | |
| 1967 | count = ttUSHORT(fc+nm+2); |
| 1968 | stringOffset = nm + ttUSHORT(fc+nm+4); |
| 1969 | for (i=0; i < count; ++i) { |
| 1970 | stbtt_uint32 loc = nm + 6 + 12 * i; |
| 1971 | if (platformID == ttUSHORT(fc+loc+0) && encodingID == ttUSHORT(fc+loc+2) |
| 1972 | && languageID == ttUSHORT(fc+loc+4) && nameID == ttUSHORT(fc+loc+6)) { |
| 1973 | *length = ttUSHORT(fc+loc+8); |
| 1974 | return (const char *) (fc+stringOffset+ttUSHORT(fc+loc+10)); |
| 1975 | } |
| 1976 | } |
| 1977 | return NULL((void*)0); |
| 1978 | } |
| 1979 | |
| 1980 | static int stbtt__matchpair(stbtt_uint8 *fc, stbtt_uint32 nm, stbtt_uint8 *name, stbtt_int32 nlen, stbtt_int32 target_id, stbtt_int32 next_id) |
| 1981 | { |
| 1982 | stbtt_int32 i; |
| 1983 | stbtt_int32 count = ttUSHORT(fc+nm+2); |
| 1984 | stbtt_int32 stringOffset = nm + ttUSHORT(fc+nm+4); |
| 1985 | |
| 1986 | for (i=0; i < count; ++i) { |
| 1987 | stbtt_uint32 loc = nm + 6 + 12 * i; |
| 1988 | stbtt_int32 id = ttUSHORT(fc+loc+6); |
| 1989 | if (id == target_id) { |
| 1990 | // find the encoding |
| 1991 | stbtt_int32 platform = ttUSHORT(fc+loc+0), encoding = ttUSHORT(fc+loc+2), language = ttUSHORT(fc+loc+4); |
| 1992 | |
| 1993 | // is this a Unicode encoding? |
| 1994 | if (platform == 0 || (platform == 3 && encoding == 1) || (platform == 3 && encoding == 10)) { |
| 1995 | stbtt_int32 slen = ttUSHORT(fc+loc+8), off = ttUSHORT(fc+loc+10); |
| 1996 | |
| 1997 | // check if there's a prefix match |
| 1998 | stbtt_int32 matchlen = stbtt__CompareUTF8toUTF16_bigendian_prefix(name, nlen, fc+stringOffset+off,slen); |
| 1999 | if (matchlen >= 0) { |
| 2000 | // check for target_id+1 immediately following, with same encoding & language |
| 2001 | if (i+1 < count && ttUSHORT(fc+loc+12+6) == next_id && ttUSHORT(fc+loc+12) == platform && ttUSHORT(fc+loc+12+2) == encoding && ttUSHORT(fc+loc+12+4) == language) { |
| 2002 | stbtt_int32 slen = ttUSHORT(fc+loc+12+8), off = ttUSHORT(fc+loc+12+10); |
| 2003 | if (slen == 0) { |
| 2004 | if (matchlen == nlen) |
| 2005 | return 1; |
| 2006 | } else if (matchlen < nlen && name[matchlen] == ' ') { |
| 2007 | ++matchlen; |
| 2008 | if (stbtt_CompareUTF8toUTF16_bigendian((char*) (name+matchlen), nlen-matchlen, (char*)(fc+stringOffset+off),slen)) |
| 2009 | return 1; |
| 2010 | } |
| 2011 | } else { |
| 2012 | // if nothing immediately following |
| 2013 | if (matchlen == nlen) |
| 2014 | return 1; |
| 2015 | } |
| 2016 | } |
| 2017 | } |
| 2018 | |
| 2019 | // @TODO handle other encodings |
| 2020 | } |
| 2021 | } |
| 2022 | return 0; |
| 2023 | } |
| 2024 | |
| 2025 | static int stbtt__matches(stbtt_uint8 *fc, stbtt_uint32 offset, stbtt_uint8 *name, stbtt_int32 flags) |
| 2026 | { |
| 2027 | stbtt_int32 nlen = (stbtt_int32) STBTT_strlen((char *) name)strlen((char *) name); |
| 2028 | stbtt_uint32 nm,hd; |
| 2029 | if (!stbtt__isfont(fc+offset)) return 0; |
| 2030 | |
| 2031 | // check italics/bold/underline flags in macStyle... |
| 2032 | if (flags) { |
| 2033 | hd = stbtt__find_table(fc, offset, "head"); |
| 2034 | if ((ttUSHORT(fc+hd+44) & 7) != (flags & 7)) return 0; |
| 2035 | } |
| 2036 | |
| 2037 | nm = stbtt__find_table(fc, offset, "name"); |
| 2038 | if (!nm) return 0; |
| 2039 | |
| 2040 | if (flags) { |
| 2041 | // if we checked the macStyle flags, then just check the family and ignore the subfamily |
| 2042 | if (stbtt__matchpair(fc, nm, name, nlen, 16, -1)) return 1; |
| 2043 | if (stbtt__matchpair(fc, nm, name, nlen, 1, -1)) return 1; |
| 2044 | if (stbtt__matchpair(fc, nm, name, nlen, 3, -1)) return 1; |
| 2045 | } else { |
| 2046 | if (stbtt__matchpair(fc, nm, name, nlen, 16, 17)) return 1; |
| 2047 | if (stbtt__matchpair(fc, nm, name, nlen, 1, 2)) return 1; |
| 2048 | if (stbtt__matchpair(fc, nm, name, nlen, 3, -1)) return 1; |
| 2049 | } |
| 2050 | |
| 2051 | return 0; |
| 2052 | } |
| 2053 | |
| 2054 | int stbtt_FindMatchingFont(const unsigned char *font_collection, const char *name_utf8, stbtt_int32 flags) |
| 2055 | { |
| 2056 | stbtt_int32 i; |
| 2057 | for (i=0;;++i) { |
| 2058 | stbtt_int32 off = stbtt_GetFontOffsetForIndex(font_collection, i); |
| 2059 | if (off < 0) return off; |
| 2060 | if (stbtt__matches((stbtt_uint8 *) font_collection, off, (stbtt_uint8*) name_utf8, flags)) |
| 2061 | return off; |
| 2062 | } |
| 2063 | } |
| 2064 | |
| 2065 | #endif // STB_TRUETYPE_IMPLEMENTATION |