mirror of https://github.com/ocornut/imgui
Updated to stb_truetype 1.05
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ocornut
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@ -1,7 +1,7 @@
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// [ImGui] this is a slightly modified version of stb_truetype.h 1.02
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// [ImGui] this is a slightly modified version of stb_truetype.h 1.05
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// [ImGui] we added stbtt_PackFontRangesGatherRects() and stbtt_PackFontRangesRenderIntoRects() and modified stbtt_PackBegin()
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// stb_truetype.h - v1.02 - public domain
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// stb_truetype.h - v1.05 - public domain
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// authored from 2009-2014 by Sean Barrett / RAD Game Tools
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//
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// This library processes TrueType files:
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@ -37,12 +37,20 @@
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// Johan Duparc
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// Hou Qiming
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// Fabian "ryg" Giesen
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// Martins Mozeiko
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// Cap Petschulat
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// Omar Cornut
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// github:aloucks
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// Peter LaValle
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//
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// Misc other:
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// Ryan Gordon
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//
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// VERSION HISTORY
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//
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// 1.05 (2015-04-15) fix misplaced definitions for STBTT_STATIC
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// 1.04 (2015-04-15) typo in example
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// 1.03 (2015-04-12) STBTT_STATIC, fix memory leak in new packing, various fixes
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// 1.02 (2014-12-10) fix various warnings & compile issues w/ stb_rect_pack, C++
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// 1.01 (2014-12-08) fix subpixel position when oversampling to exactly match
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// non-oversampled; STBTT_POINT_SIZE for packed case only
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@ -86,6 +94,9 @@
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// before the #include of this file. This expands out the actual
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// implementation into that C/C++ file.
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//
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// To make the implementation private to the file that generates the implementation,
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// #define STBTT_STATIC
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//
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// Simple 3D API (don't ship this, but it's fine for tools and quick start)
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// stbtt_BakeFontBitmap() -- bake a font to a bitmap for use as texture
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// stbtt_GetBakedQuad() -- compute quad to draw for a given char
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@ -225,16 +236,16 @@
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#define STB_TRUETYPE_IMPLEMENTATION // force following include to generate implementation
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#include "stb_truetype.h"
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char ttf_buffer[1<<20];
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unsigned char ttf_buffer[1<<20];
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unsigned char temp_bitmap[512*512];
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stbtt_bakedchar cdata[96]; // ASCII 32..126 is 95 glyphs
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GLstbtt_uint ftex;
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GLuint ftex;
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void my_stbtt_initfont(void)
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{
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fread(ttf_buffer, 1, 1<<20, fopen("c:/windows/fonts/times.ttf", "rb"));
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stbtt_BakeFontBitmap(data,0, 32.0, temp_bitmap,512,512, 32,96, cdata); // no guarantee this fits!
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stbtt_BakeFontBitmap(ttf_buffer,0, 32.0, temp_bitmap,512,512, 32,96, cdata); // no guarantee this fits!
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// can free ttf_buffer at this point
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glGenTextures(1, &ftex);
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glBindTexture(GL_TEXTURE_2D, ftex);
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@ -246,6 +257,7 @@ void my_stbtt_initfont(void)
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void my_stbtt_print(float x, float y, char *text)
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{
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// assume orthographic projection with units = screen pixels, origin at top left
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, ftex);
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glBegin(GL_QUADS);
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while (*text) {
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@ -379,12 +391,6 @@ int main(int arg, char **argv)
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typedef char stbtt__check_size32[sizeof(stbtt_int32)==4 ? 1 : -1];
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typedef char stbtt__check_size16[sizeof(stbtt_int16)==2 ? 1 : -1];
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#ifdef STBTT_STATIC
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#define STBTT_DEF static
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#else
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#define STBTT_DEF extern
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#endif
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// #define your own STBTT_sort() to override this to avoid qsort
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#ifndef STBTT_sort
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#include <stdlib.h>
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@ -437,6 +443,12 @@ int main(int arg, char **argv)
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#ifndef __STB_INCLUDE_STB_TRUETYPE_H__
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#define __STB_INCLUDE_STB_TRUETYPE_H__
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#ifdef STBTT_STATIC
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#define STBTT_DEF static
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#else
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#define STBTT_DEF extern
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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@ -1059,7 +1071,6 @@ STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codep
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stbtt_uint16 searchRange = ttUSHORT(data+index_map+8) >> 1;
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stbtt_uint16 entrySelector = ttUSHORT(data+index_map+10);
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stbtt_uint16 rangeShift = ttUSHORT(data+index_map+12) >> 1;
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stbtt_uint16 item, offset, start, end;
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// do a binary search of the segments
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stbtt_uint32 endCount = index_map + 14;
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@ -1076,8 +1087,8 @@ STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codep
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// now decrement to bias correctly to find smallest
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search -= 2;
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while (entrySelector) {
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stbtt_uint16 end;
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searchRange >>= 1;
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start = ttUSHORT(data + search + searchRange*2 + segcount*2 + 2);
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end = ttUSHORT(data + search + searchRange*2);
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if (unicode_codepoint > end)
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search += searchRange*2;
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@ -1085,19 +1096,21 @@ STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codep
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}
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search += 2;
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item = (stbtt_uint16) ((search - endCount) >> 1);
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{
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stbtt_uint16 offset, start;
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stbtt_uint16 item = (stbtt_uint16) ((search - endCount) >> 1);
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STBTT_assert(unicode_codepoint <= ttUSHORT(data + endCount + 2*item));
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start = ttUSHORT(data + index_map + 14 + segcount*2 + 2 + 2*item);
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end = ttUSHORT(data + index_map + 14 + 2 + 2*item);
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if (unicode_codepoint < start)
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return 0;
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STBTT_assert(unicode_codepoint <= ttUSHORT(data + endCount + 2*item));
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start = ttUSHORT(data + index_map + 14 + segcount*2 + 2 + 2*item);
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if (unicode_codepoint < start)
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return 0;
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offset = ttUSHORT(data + index_map + 14 + segcount*6 + 2 + 2*item);
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if (offset == 0)
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return (stbtt_uint16) (unicode_codepoint + ttSHORT(data + index_map + 14 + segcount*4 + 2 + 2*item));
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offset = ttUSHORT(data + index_map + 14 + segcount*6 + 2 + 2*item);
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if (offset == 0)
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return (stbtt_uint16) (unicode_codepoint + ttSHORT(data + index_map + 14 + segcount*4 + 2 + 2*item));
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return ttUSHORT(data + offset + (unicode_codepoint-start)*2 + index_map + 14 + segcount*6 + 2 + 2*item);
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return ttUSHORT(data + offset + (unicode_codepoint-start)*2 + index_map + 14 + segcount*6 + 2 + 2*item);
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}
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} else if (format == 12 || format == 13) {
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stbtt_uint32 ngroups = ttULONG(data+index_map+12);
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stbtt_int32 low,high;
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@ -2054,8 +2067,8 @@ STBTT_DEF void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph, int
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float d3d_bias = opengl_fillrule ? 0 : -0.5f;
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float ipw = 1.0f / pw, iph = 1.0f / ph;
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stbtt_bakedchar *b = chardata + char_index;
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int round_x = STBTT_ifloor((*xpos + b->xoff) + 0.5);
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int round_y = STBTT_ifloor((*ypos + b->yoff) + 0.5);
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int round_x = STBTT_ifloor((*xpos + b->xoff) + 0.5f);
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int round_y = STBTT_ifloor((*ypos + b->yoff) + 0.5f);
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q->x0 = round_x + d3d_bias;
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q->y0 = round_y + d3d_bias;
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@ -2209,7 +2222,7 @@ static void stbtt__h_prefilter(unsigned char *pixels, int w, int h, int stride_i
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for (j=0; j < h; ++j) {
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int i;
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unsigned int total;
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memset(buffer, 0, kernel_width);
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STBTT_memset(buffer, 0, kernel_width);
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total = 0;
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@ -2263,7 +2276,7 @@ static void stbtt__v_prefilter(unsigned char *pixels, int w, int h, int stride_i
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for (j=0; j < w; ++j) {
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int i;
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unsigned int total;
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memset(buffer, 0, kernel_width);
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STBTT_memset(buffer, 0, kernel_width);
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total = 0;
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@ -2333,7 +2346,7 @@ STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fon
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for (j=0; j < ranges[i].num_chars_in_range; ++j) {
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int x0,y0,x1,y1;
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int glyph = stbtt_FindGlyphIndex(info,ranges[i].first_unicode_char_in_range + j);
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if (glyph) {
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if (glyph) {
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stbtt_GetGlyphBitmapBoxSubpixel(info,glyph,
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scale * spc->h_oversample,
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scale * spc->v_oversample,
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@ -2341,10 +2354,10 @@ STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fon
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&x0,&y0,&x1,&y1);
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rects[k].w = (stbrp_coord) (x1-x0 + spc->padding + spc->h_oversample-1);
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rects[k].h = (stbrp_coord) (y1-y0 + spc->padding + spc->v_oversample-1);
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} else {
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} else {
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rects[k].w = rects[k].h = 1;
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}
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++k;
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++k;
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}
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}
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@ -2453,6 +2466,7 @@ STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontd
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return_value = stbtt_PackFontRangesRenderIntoRects(spc, &info, ranges, num_ranges, rects);
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STBTT_free(rects, spc->user_allocator_context);
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return return_value;
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}
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@ -2473,8 +2487,8 @@ STBTT_DEF void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph, i
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stbtt_packedchar *b = chardata + char_index;
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if (align_to_integer) {
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float x = (float) STBTT_ifloor((*xpos + b->xoff) + 0.5);
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float y = (float) STBTT_ifloor((*ypos + b->yoff) + 0.5);
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float x = (float) STBTT_ifloor((*xpos + b->xoff) + 0.5f);
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float y = (float) STBTT_ifloor((*ypos + b->yoff) + 0.5f);
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q->x0 = x;
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q->y0 = y;
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q->x1 = x + b->xoff2 - b->xoff;
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