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Updated to stb_truetype 1.05

pull/247/head
ocornut 10 years ago
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46a27cdb6b
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95e2afcad6
1 changed files with 46 additions and 32 deletions
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  1. 78
      stb_truetype.h

78
stb_truetype.h
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@ -1,7 +1,7 @@
// [ImGui] this is a slightly modified version of stb_truetype.h 1.02
// [ImGui] this is a slightly modified version of stb_truetype.h 1.05
// [ImGui] we added stbtt_PackFontRangesGatherRects() and stbtt_PackFontRangesRenderIntoRects() and modified stbtt_PackBegin()
// stb_truetype.h - v1.02 - public domain
// stb_truetype.h - v1.05 - public domain
// authored from 2009-2014 by Sean Barrett / RAD Game Tools
//
// This library processes TrueType files:
@ -37,12 +37,20 @@
// Johan Duparc
// Hou Qiming
// Fabian "ryg" Giesen
// Martins Mozeiko
// Cap Petschulat
// Omar Cornut
// github:aloucks
// Peter LaValle
//
// Misc other:
// Ryan Gordon
//
// VERSION HISTORY
//
// 1.05 (2015-04-15) fix misplaced definitions for STBTT_STATIC
// 1.04 (2015-04-15) typo in example
// 1.03 (2015-04-12) STBTT_STATIC, fix memory leak in new packing, various fixes
// 1.02 (2014-12-10) fix various warnings & compile issues w/ stb_rect_pack, C++
// 1.01 (2014-12-08) fix subpixel position when oversampling to exactly match
// non-oversampled; STBTT_POINT_SIZE for packed case only
@ -86,6 +94,9 @@
// before the #include of this file. This expands out the actual
// implementation into that C/C++ file.
//
// To make the implementation private to the file that generates the implementation,
// #define STBTT_STATIC
//
// Simple 3D API (don't ship this, but it's fine for tools and quick start)
// stbtt_BakeFontBitmap() -- bake a font to a bitmap for use as texture
// stbtt_GetBakedQuad() -- compute quad to draw for a given char
@ -225,16 +236,16 @@
#define STB_TRUETYPE_IMPLEMENTATION // force following include to generate implementation
#include "stb_truetype.h"
char ttf_buffer[1<<20];
unsigned char ttf_buffer[1<<20];
unsigned char temp_bitmap[512*512];
stbtt_bakedchar cdata[96]; // ASCII 32..126 is 95 glyphs
GLstbtt_uint ftex;
GLuint ftex;
void my_stbtt_initfont(void)
{
fread(ttf_buffer, 1, 1<<20, fopen("c:/windows/fonts/times.ttf", "rb"));
stbtt_BakeFontBitmap(data,0, 32.0, temp_bitmap,512,512, 32,96, cdata); // no guarantee this fits!
stbtt_BakeFontBitmap(ttf_buffer,0, 32.0, temp_bitmap,512,512, 32,96, cdata); // no guarantee this fits!
// can free ttf_buffer at this point
glGenTextures(1, &ftex);
glBindTexture(GL_TEXTURE_2D, ftex);
@ -246,6 +257,7 @@ void my_stbtt_initfont(void)
void my_stbtt_print(float x, float y, char *text)
{
// assume orthographic projection with units = screen pixels, origin at top left
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, ftex);
glBegin(GL_QUADS);
while (*text) {
@ -379,12 +391,6 @@ int main(int arg, char **argv)
typedef char stbtt__check_size32[sizeof(stbtt_int32)==4 ? 1 : -1];
typedef char stbtt__check_size16[sizeof(stbtt_int16)==2 ? 1 : -1];
#ifdef STBTT_STATIC
#define STBTT_DEF static
#else
#define STBTT_DEF extern
#endif
// #define your own STBTT_sort() to override this to avoid qsort
#ifndef STBTT_sort
#include <stdlib.h>
@ -437,6 +443,12 @@ int main(int arg, char **argv)
#ifndef __STB_INCLUDE_STB_TRUETYPE_H__
#define __STB_INCLUDE_STB_TRUETYPE_H__
#ifdef STBTT_STATIC
#define STBTT_DEF static
#else
#define STBTT_DEF extern
#endif
#ifdef __cplusplus
extern "C" {
#endif
@ -1059,7 +1071,6 @@ STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codep
stbtt_uint16 searchRange = ttUSHORT(data+index_map+8) >> 1;
stbtt_uint16 entrySelector = ttUSHORT(data+index_map+10);
stbtt_uint16 rangeShift = ttUSHORT(data+index_map+12) >> 1;
stbtt_uint16 item, offset, start, end;
// do a binary search of the segments
stbtt_uint32 endCount = index_map + 14;
@ -1076,8 +1087,8 @@ STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codep
// now decrement to bias correctly to find smallest
search -= 2;
while (entrySelector) {
stbtt_uint16 end;
searchRange >>= 1;
start = ttUSHORT(data + search + searchRange*2 + segcount*2 + 2);
end = ttUSHORT(data + search + searchRange*2);
if (unicode_codepoint > end)
search += searchRange*2;
@ -1085,19 +1096,21 @@ STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codep
}
search += 2;
item = (stbtt_uint16) ((search - endCount) >> 1);
{
stbtt_uint16 offset, start;
stbtt_uint16 item = (stbtt_uint16) ((search - endCount) >> 1);
STBTT_assert(unicode_codepoint <= ttUSHORT(data + endCount + 2*item));
start = ttUSHORT(data + index_map + 14 + segcount*2 + 2 + 2*item);
end = ttUSHORT(data + index_map + 14 + 2 + 2*item);
if (unicode_codepoint < start)
return 0;
STBTT_assert(unicode_codepoint <= ttUSHORT(data + endCount + 2*item));
start = ttUSHORT(data + index_map + 14 + segcount*2 + 2 + 2*item);
if (unicode_codepoint < start)
return 0;
offset = ttUSHORT(data + index_map + 14 + segcount*6 + 2 + 2*item);
if (offset == 0)
return (stbtt_uint16) (unicode_codepoint + ttSHORT(data + index_map + 14 + segcount*4 + 2 + 2*item));
offset = ttUSHORT(data + index_map + 14 + segcount*6 + 2 + 2*item);
if (offset == 0)
return (stbtt_uint16) (unicode_codepoint + ttSHORT(data + index_map + 14 + segcount*4 + 2 + 2*item));
return ttUSHORT(data + offset + (unicode_codepoint-start)*2 + index_map + 14 + segcount*6 + 2 + 2*item);
return ttUSHORT(data + offset + (unicode_codepoint-start)*2 + index_map + 14 + segcount*6 + 2 + 2*item);
}
} else if (format == 12 || format == 13) {
stbtt_uint32 ngroups = ttULONG(data+index_map+12);
stbtt_int32 low,high;
@ -2054,8 +2067,8 @@ STBTT_DEF void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph, int
float d3d_bias = opengl_fillrule ? 0 : -0.5f;
float ipw = 1.0f / pw, iph = 1.0f / ph;
stbtt_bakedchar *b = chardata + char_index;
int round_x = STBTT_ifloor((*xpos + b->xoff) + 0.5);
int round_y = STBTT_ifloor((*ypos + b->yoff) + 0.5);
int round_x = STBTT_ifloor((*xpos + b->xoff) + 0.5f);
int round_y = STBTT_ifloor((*ypos + b->yoff) + 0.5f);
q->x0 = round_x + d3d_bias;
q->y0 = round_y + d3d_bias;
@ -2209,7 +2222,7 @@ static void stbtt__h_prefilter(unsigned char *pixels, int w, int h, int stride_i
for (j=0; j < h; ++j) {
int i;
unsigned int total;
memset(buffer, 0, kernel_width);
STBTT_memset(buffer, 0, kernel_width);
total = 0;
@ -2263,7 +2276,7 @@ static void stbtt__v_prefilter(unsigned char *pixels, int w, int h, int stride_i
for (j=0; j < w; ++j) {
int i;
unsigned int total;
memset(buffer, 0, kernel_width);
STBTT_memset(buffer, 0, kernel_width);
total = 0;
@ -2333,7 +2346,7 @@ STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fon
for (j=0; j < ranges[i].num_chars_in_range; ++j) {
int x0,y0,x1,y1;
int glyph = stbtt_FindGlyphIndex(info,ranges[i].first_unicode_char_in_range + j);
if (glyph) {
if (glyph) {
stbtt_GetGlyphBitmapBoxSubpixel(info,glyph,
scale * spc->h_oversample,
scale * spc->v_oversample,
@ -2341,10 +2354,10 @@ STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fon
&x0,&y0,&x1,&y1);
rects[k].w = (stbrp_coord) (x1-x0 + spc->padding + spc->h_oversample-1);
rects[k].h = (stbrp_coord) (y1-y0 + spc->padding + spc->v_oversample-1);
} else {
} else {
rects[k].w = rects[k].h = 1;
}
++k;
++k;
}
}
@ -2453,6 +2466,7 @@ STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontd
return_value = stbtt_PackFontRangesRenderIntoRects(spc, &info, ranges, num_ranges, rects);
STBTT_free(rects, spc->user_allocator_context);
return return_value;
}
@ -2473,8 +2487,8 @@ STBTT_DEF void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph, i
stbtt_packedchar *b = chardata + char_index;
if (align_to_integer) {
float x = (float) STBTT_ifloor((*xpos + b->xoff) + 0.5);
float y = (float) STBTT_ifloor((*ypos + b->yoff) + 0.5);
float x = (float) STBTT_ifloor((*xpos + b->xoff) + 0.5f);
float y = (float) STBTT_ifloor((*ypos + b->yoff) + 0.5f);
q->x0 = x;
q->y0 = y;
q->x1 = x + b->xoff2 - b->xoff;

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