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allow font ranges with first_char = 0;

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fix divide by 0 for exactly-vertical edges;
fix possible divide by 0 for exactly-horizontal edges
add documentation for stbtt_Rasterize;
This commit is contained in:
Sean Barrett
2015-09-13 11:42:54 -07:00
parent 54b1879725
commit ff116a4fe8
2 changed files with 25 additions and 9 deletions
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12
tests/test_truetype.c
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@ -24,6 +24,7 @@ void debug(void)
unsigned char temp_bitmap[BITMAP_H][BITMAP_W];
stbtt_bakedchar cdata[256*2]; // ASCII 32..126 is 95 glyphs
stbtt_packedchar pdata[256*2];
int main(int argc, char **argv)
{
stbtt_fontinfo font;
@ -35,6 +36,17 @@ int main(int argc, char **argv)
// @TODO: why is minglui.ttc failing?
fread(ttf_buffer, 1, 1<<25, fopen(argc > 3 ? argv[3] : "c:/windows/fonts/mingliu.ttc", "rb"));
//fread(ttf_buffer, 1, 1<<25, fopen(argc > 3 ? argv[3] : "c:/x/DroidSansMono.ttf", "rb"));
{
static stbtt_pack_context pc;
static stbtt_packedchar cd[256];
static unsigned char atlas[1024*1024];
stbtt_PackBegin(&pc, atlas, 1024,1024,1024,1,NULL);
stbtt_PackFontRange(&pc, ttf_buffer, 0, 32.0, 0, 256, cd);
stbtt_PackEnd(&pc);
}
#if 0
stbtt_BakeFontBitmap(ttf_buffer,stbtt_GetFontOffsetForIndex(ttf_buffer,0), 40.0, temp_bitmap[0],BITMAP_W,BITMAP_H, 32,96, cdata); // no guarantee this fits!
stbi_write_png("fonttest1.png", BITMAP_W, BITMAP_H, 1, temp_bitmap, 0);