#if 0#endif
#if 0#endif
#if 0#endif
#ifdef STB_TRUETYPE_IMPLEMENTATION
#ifndef stbtt_uint8
typedef unsigned char stbtt_uint8;
typedef signed char stbtt_int8;
typedef unsigned short stbtt_uint16;
typedef signed short stbtt_int16;
typedef unsigned int stbtt_uint32;
typedef signed int stbtt_int32;
#endif
typedef char stbtt__check_size32[sizeof(stbtt_int32)==4 ? 1 : -1];
typedef char stbtt__check_size16[sizeof(stbtt_int16)==2 ? 1 : -1];
#ifndef STBTT_ifloor
#include <math.h>
#define STBTT_ifloor(x) ((int) floor(x))
#define STBTT_iceil(x) ((int) ceil(x))
#endif
#ifndef STBTT_sqrt
#include <math.h>
#define STBTT_sqrt(x) sqrt(x)
#endif
#ifndef STBTT_malloc
#include <stdlib.h>
#define STBTT_malloc(x,u) ((void)(u),malloc(x))
#define STBTT_free(x,u) ((void)(u),free(x))
#endif
#ifndef STBTT_assert
#include <assert.h>
#define STBTT_assert(x) assert(x)
#endif
#ifndef STBTT_strlen
#include <string.h>
#define STBTT_strlen(x) strlen(x)
#endif
#ifndef STBTT_memcpy
#include <memory.h>
#define STBTT_memcpy memcpy
#define STBTT_memset memset
#endif
#endif
#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
typedef struct
{
unsigned short x0,y0,x1,y1; float xoff,yoff,xadvance;
} stbtt_bakedchar;
STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset, float pixel_height, unsigned char *pixels, int pw, int ph, int first_char, int num_chars, stbtt_bakedchar *chardata);
typedef struct
{
float x0,y0,s0,t0; float x1,y1,s1,t1; } stbtt_aligned_quad;
STBTT_DEF void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int opengl_fillrule);
typedef struct
{
unsigned short x0,y0,x1,y1; float xoff,yoff,xadvance;
float xoff2,yoff2;
} stbtt_packedchar;
typedef struct stbtt_pack_context stbtt_pack_context;
typedef struct stbtt_fontinfo stbtt_fontinfo;
#ifndef STB_RECT_PACK_VERSION
typedef struct stbrp_rect stbrp_rect;
#endif
STBTT_DEF int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int width, int height, int stride_in_bytes, int padding, void *alloc_context);
STBTT_DEF void stbtt_PackEnd (stbtt_pack_context *spc);
#define STBTT_POINT_SIZE(x) (-(x))
STBTT_DEF int stbtt_PackFontRange(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, float font_size,
int first_unicode_char_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range);
typedef struct
{
float font_size;
int first_unicode_codepoint_in_range; int *array_of_unicode_codepoints; int num_chars;
stbtt_packedchar *chardata_for_range; unsigned char h_oversample, v_oversample; } stbtt_pack_range;
STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges);
STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample);
STBTT_DEF void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int align_to_integer);
STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects);
STBTT_DEF void stbtt_PackFontRangesPackRects(stbtt_pack_context *spc, stbrp_rect *rects, int num_rects);
STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects);
struct stbtt_pack_context {
void *user_allocator_context;
void *pack_info;
int width;
int height;
int stride_in_bytes;
int padding;
unsigned int h_oversample, v_oversample;
unsigned char *pixels;
void *nodes;
};
STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index);
typedef struct stbtt_fontinfo
{
void * userdata;
unsigned char * data; int fontstart;
int numGlyphs;
int loca,head,glyf,hhea,hmtx,kern; int index_map; int indexToLocFormat; } stbtt_fontinfo;
STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset);
STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint);
STBTT_DEF float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float pixels);
STBTT_DEF float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels);
STBTT_DEF void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap);
STBTT_DEF void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1);
STBTT_DEF void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing);
STBTT_DEF int stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2);
STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1);
STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing);
STBTT_DEF int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2);
STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1);
#ifndef STBTT_vmove
enum {
STBTT_vmove=1,
STBTT_vline,
STBTT_vcurve
};
#endif
#ifndef stbtt_vertex
#define stbtt_vertex_type short
typedef struct
{
stbtt_vertex_type x,y,cx,cy;
unsigned char type,padding;
} stbtt_vertex;
#endif
STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index);
STBTT_DEF int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices);
STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **vertices);
STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *vertices);
STBTT_DEF void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata);
STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff);
STBTT_DEF 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);
STBTT_DEF 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);
STBTT_DEF 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);
STBTT_DEF void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);
STBTT_DEF 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);
STBTT_DEF unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff);
STBTT_DEF 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);
STBTT_DEF 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);
STBTT_DEF 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);
STBTT_DEF void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);
STBTT_DEF 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);
typedef struct
{
int w,h,stride;
unsigned char *pixels;
} stbtt__bitmap;
STBTT_DEF 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);
STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags);
#define STBTT_MACSTYLE_DONTCARE 0
#define STBTT_MACSTYLE_BOLD 1
#define STBTT_MACSTYLE_ITALIC 2
#define STBTT_MACSTYLE_UNDERSCORE 4
#define STBTT_MACSTYLE_NONE 8
STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2);
STBTT_DEF const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID);
enum { STBTT_PLATFORM_ID_UNICODE =0,
STBTT_PLATFORM_ID_MAC =1,
STBTT_PLATFORM_ID_ISO =2,
STBTT_PLATFORM_ID_MICROSOFT =3
};
enum { STBTT_UNICODE_EID_UNICODE_1_0 =0,
STBTT_UNICODE_EID_UNICODE_1_1 =1,
STBTT_UNICODE_EID_ISO_10646 =2,
STBTT_UNICODE_EID_UNICODE_2_0_BMP=3,
STBTT_UNICODE_EID_UNICODE_2_0_FULL=4
};
enum { STBTT_MS_EID_SYMBOL =0,
STBTT_MS_EID_UNICODE_BMP =1,
STBTT_MS_EID_SHIFTJIS =2,
STBTT_MS_EID_UNICODE_FULL =10
};
enum { STBTT_MAC_EID_ROMAN =0, STBTT_MAC_EID_ARABIC =4,
STBTT_MAC_EID_JAPANESE =1, STBTT_MAC_EID_HEBREW =5,
STBTT_MAC_EID_CHINESE_TRAD =2, STBTT_MAC_EID_GREEK =6,
STBTT_MAC_EID_KOREAN =3, STBTT_MAC_EID_RUSSIAN =7
};
enum { STBTT_MS_LANG_ENGLISH =0x0409, STBTT_MS_LANG_ITALIAN =0x0410,
STBTT_MS_LANG_CHINESE =0x0804, STBTT_MS_LANG_JAPANESE =0x0411,
STBTT_MS_LANG_DUTCH =0x0413, STBTT_MS_LANG_KOREAN =0x0412,
STBTT_MS_LANG_FRENCH =0x040c, STBTT_MS_LANG_RUSSIAN =0x0419,
STBTT_MS_LANG_GERMAN =0x0407, STBTT_MS_LANG_SPANISH =0x0409,
STBTT_MS_LANG_HEBREW =0x040d, STBTT_MS_LANG_SWEDISH =0x041D
};
enum { STBTT_MAC_LANG_ENGLISH =0 , STBTT_MAC_LANG_JAPANESE =11,
STBTT_MAC_LANG_ARABIC =12, STBTT_MAC_LANG_KOREAN =23,
STBTT_MAC_LANG_DUTCH =4 , STBTT_MAC_LANG_RUSSIAN =32,
STBTT_MAC_LANG_FRENCH =1 , STBTT_MAC_LANG_SPANISH =6 ,
STBTT_MAC_LANG_GERMAN =2 , STBTT_MAC_LANG_SWEDISH =5 ,
STBTT_MAC_LANG_HEBREW =10, STBTT_MAC_LANG_CHINESE_SIMPLIFIED =33,
STBTT_MAC_LANG_ITALIAN =3 , STBTT_MAC_LANG_CHINESE_TRAD =19
};
#ifdef __cplusplus
}
#endif
#endif
#ifdef STB_TRUETYPE_IMPLEMENTATION
#ifndef STBTT_MAX_OVERSAMPLE
#define STBTT_MAX_OVERSAMPLE 8
#endif
#if STBTT_MAX_OVERSAMPLE > 255
#error "STBTT_MAX_OVERSAMPLE cannot be > 255"
#endif
typedef int stbtt__test_oversample_pow2[(STBTT_MAX_OVERSAMPLE & (STBTT_MAX_OVERSAMPLE-1)) == 0 ? 1 : -1];
#ifndef STBTT_RASTERIZER_VERSION
#define STBTT_RASTERIZER_VERSION 2
#endif
#define ttBYTE(p) (* (stbtt_uint8 *) (p))
#define ttCHAR(p) (* (stbtt_int8 *) (p))
#define ttFixed(p) ttLONG(p)
#if defined(STB_TRUETYPE_BIGENDIAN) && !defined(ALLOW_UNALIGNED_TRUETYPE)
#define ttUSHORT(p) (* (stbtt_uint16 *) (p))
#define ttSHORT(p) (* (stbtt_int16 *) (p))
#define ttULONG(p) (* (stbtt_uint32 *) (p))
#define ttLONG(p) (* (stbtt_int32 *) (p))
#else
static stbtt_uint16 ttUSHORT(const stbtt_uint8 *p) { return p[0]*256 + p[1]; }
static stbtt_int16 ttSHORT(const stbtt_uint8 *p) { return p[0]*256 + p[1]; }
static stbtt_uint32 ttULONG(const stbtt_uint8 *p) { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }
static stbtt_int32 ttLONG(const stbtt_uint8 *p) { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }
#endif
#define stbtt_tag4(p,c0,c1,c2,c3) ((p)[0] == (c0) && (p)[1] == (c1) && (p)[2] == (c2) && (p)[3] == (c3))
#define stbtt_tag(p,str) stbtt_tag4(p,str[0],str[1],str[2],str[3])
static int stbtt__isfont(const stbtt_uint8 *font)
{
if (stbtt_tag4(font, '1',0,0,0)) return 1; if (stbtt_tag(font, "typ1")) return 1; if (stbtt_tag(font, "OTTO")) return 1; if (stbtt_tag4(font, 0,1,0,0)) return 1; return 0;
}
static stbtt_uint32 stbtt__find_table(stbtt_uint8 *data, stbtt_uint32 fontstart, const char *tag)
{
stbtt_int32 num_tables = ttUSHORT(data+fontstart+4);
stbtt_uint32 tabledir = fontstart + 12;
stbtt_int32 i;
for (i=0; i < num_tables; ++i) {
stbtt_uint32 loc = tabledir + 16*i;
if (stbtt_tag(data+loc+0, tag))
return ttULONG(data+loc+8);
}
return 0;
}
STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *font_collection, int index)
{
if (stbtt__isfont(font_collection))
return index == 0 ? 0 : -1;
if (stbtt_tag(font_collection, "ttcf")) {
if (ttULONG(font_collection+4) == 0x00010000 || ttULONG(font_collection+4) == 0x00020000) {
stbtt_int32 n = ttLONG(font_collection+8);
if (index >= n)
return -1;
return ttULONG(font_collection+12+index*4);
}
}
return -1;
}
STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data2, int fontstart)
{
stbtt_uint8 *data = (stbtt_uint8 *) data2;
stbtt_uint32 cmap, t;
stbtt_int32 i,numTables;
info->data = data;
info->fontstart = fontstart;
cmap = stbtt__find_table(data, fontstart, "cmap"); info->loca = stbtt__find_table(data, fontstart, "loca"); info->head = stbtt__find_table(data, fontstart, "head"); info->glyf = stbtt__find_table(data, fontstart, "glyf"); info->hhea = stbtt__find_table(data, fontstart, "hhea"); info->hmtx = stbtt__find_table(data, fontstart, "hmtx"); info->kern = stbtt__find_table(data, fontstart, "kern"); if (!cmap || !info->loca || !info->head || !info->glyf || !info->hhea || !info->hmtx)
return 0;
t = stbtt__find_table(data, fontstart, "maxp");
if (t)
info->numGlyphs = ttUSHORT(data+t+4);
else
info->numGlyphs = 0xffff;
numTables = ttUSHORT(data + cmap + 2);
info->index_map = 0;
for (i=0; i < numTables; ++i) {
stbtt_uint32 encoding_record = cmap + 4 + 8 * i;
switch(ttUSHORT(data+encoding_record)) {
case STBTT_PLATFORM_ID_MICROSOFT:
switch (ttUSHORT(data+encoding_record+2)) {
case STBTT_MS_EID_UNICODE_BMP:
case STBTT_MS_EID_UNICODE_FULL:
info->index_map = cmap + ttULONG(data+encoding_record+4);
break;
}
break;
case STBTT_PLATFORM_ID_UNICODE:
info->index_map = cmap + ttULONG(data+encoding_record+4);
break;
}
}
if (info->index_map == 0)
return 0;
info->indexToLocFormat = ttUSHORT(data+info->head + 50);
return 1;
}
STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint)
{
stbtt_uint8 *data = info->data;
stbtt_uint32 index_map = info->index_map;
stbtt_uint16 format = ttUSHORT(data + index_map + 0);
if (format == 0) { stbtt_int32 bytes = ttUSHORT(data + index_map + 2);
if (unicode_codepoint < bytes-6)
return ttBYTE(data + index_map + 6 + unicode_codepoint);
return 0;
} else if (format == 6) {
stbtt_uint32 first = ttUSHORT(data + index_map + 6);
stbtt_uint32 count = ttUSHORT(data + index_map + 8);
if ((stbtt_uint32) unicode_codepoint >= first && (stbtt_uint32) unicode_codepoint < first+count)
return ttUSHORT(data + index_map + 10 + (unicode_codepoint - first)*2);
return 0;
} else if (format == 2) {
STBTT_assert(0); return 0;
} else if (format == 4) { stbtt_uint16 segcount = ttUSHORT(data+index_map+6) >> 1;
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_uint32 endCount = index_map + 14;
stbtt_uint32 search = endCount;
if (unicode_codepoint > 0xffff)
return 0;
if (unicode_codepoint >= ttUSHORT(data + search + rangeShift*2))
search += rangeShift*2;
search -= 2;
while (entrySelector) {
stbtt_uint16 end;
searchRange >>= 1;
end = ttUSHORT(data + search + searchRange*2);
if (unicode_codepoint > end)
search += searchRange*2;
--entrySelector;
}
search += 2;
{
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);
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));
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;
low = 0; high = (stbtt_int32)ngroups;
while (low < high) {
stbtt_int32 mid = low + ((high-low) >> 1); stbtt_uint32 start_char = ttULONG(data+index_map+16+mid*12);
stbtt_uint32 end_char = ttULONG(data+index_map+16+mid*12+4);
if ((stbtt_uint32) unicode_codepoint < start_char)
high = mid;
else if ((stbtt_uint32) unicode_codepoint > end_char)
low = mid+1;
else {
stbtt_uint32 start_glyph = ttULONG(data+index_map+16+mid*12+8);
if (format == 12)
return start_glyph + unicode_codepoint-start_char;
else return start_glyph;
}
}
return 0; }
STBTT_assert(0);
return 0;
}
STBTT_DEF int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices)
{
return stbtt_GetGlyphShape(info, stbtt_FindGlyphIndex(info, unicode_codepoint), vertices);
}
static void stbtt_setvertex(stbtt_vertex *v, stbtt_uint8 type, stbtt_int32 x, stbtt_int32 y, stbtt_int32 cx, stbtt_int32 cy)
{
v->type = type;
v->x = (stbtt_int16) x;
v->y = (stbtt_int16) y;
v->cx = (stbtt_int16) cx;
v->cy = (stbtt_int16) cy;
}
static int stbtt__GetGlyfOffset(const stbtt_fontinfo *info, int glyph_index)
{
int g1,g2;
if (glyph_index >= info->numGlyphs) return -1; if (info->indexToLocFormat >= 2) return -1;
if (info->indexToLocFormat == 0) {
g1 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2) * 2;
g2 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2 + 2) * 2;
} else {
g1 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4);
g2 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4 + 4);
}
return g1==g2 ? -1 : g1; }
STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1)
{
int g = stbtt__GetGlyfOffset(info, glyph_index);
if (g < 0) return 0;
if (x0) *x0 = ttSHORT(info->data + g + 2);
if (y0) *y0 = ttSHORT(info->data + g + 4);
if (x1) *x1 = ttSHORT(info->data + g + 6);
if (y1) *y1 = ttSHORT(info->data + g + 8);
return 1;
}
STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1)
{
return stbtt_GetGlyphBox(info, stbtt_FindGlyphIndex(info,codepoint), x0,y0,x1,y1);
}
STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index)
{
stbtt_int16 numberOfContours;
int g = stbtt__GetGlyfOffset(info, glyph_index);
if (g < 0) return 1;
numberOfContours = ttSHORT(info->data + g);
return numberOfContours == 0;
}
static int stbtt__close_shape(stbtt_vertex *vertices, int num_vertices, int was_off, int start_off,
stbtt_int32 sx, stbtt_int32 sy, stbtt_int32 scx, stbtt_int32 scy, stbtt_int32 cx, stbtt_int32 cy)
{
if (start_off) {
if (was_off)
stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+scx)>>1, (cy+scy)>>1, cx,cy);
stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, sx,sy,scx,scy);
} else {
if (was_off)
stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve,sx,sy,cx,cy);
else
stbtt_setvertex(&vertices[num_vertices++], STBTT_vline,sx,sy,0,0);
}
return num_vertices;
}
STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices)
{
stbtt_int16 numberOfContours;
stbtt_uint8 *endPtsOfContours;
stbtt_uint8 *data = info->data;
stbtt_vertex *vertices=0;
int num_vertices=0;
int g = stbtt__GetGlyfOffset(info, glyph_index);
*pvertices = NULL;
if (g < 0) return 0;
numberOfContours = ttSHORT(data + g);
if (numberOfContours > 0) {
stbtt_uint8 flags=0,flagcount;
stbtt_int32 ins, i,j=0,m,n, next_move, was_off=0, off, start_off=0;
stbtt_int32 x,y,cx,cy,sx,sy, scx,scy;
stbtt_uint8 *points;
endPtsOfContours = (data + g + 10);
ins = ttUSHORT(data + g + 10 + numberOfContours * 2);
points = data + g + 10 + numberOfContours * 2 + 2 + ins;
n = 1+ttUSHORT(endPtsOfContours + numberOfContours*2-2);
m = n + 2*numberOfContours; vertices = (stbtt_vertex *) STBTT_malloc(m * sizeof(vertices[0]), info->userdata);
if (vertices == 0)
return 0;
next_move = 0;
flagcount=0;
off = m - n;
for (i=0; i < n; ++i) {
if (flagcount == 0) {
flags = *points++;
if (flags & 8)
flagcount = *points++;
} else
--flagcount;
vertices[off+i].type = flags;
}
x=0;
for (i=0; i < n; ++i) {
flags = vertices[off+i].type;
if (flags & 2) {
stbtt_int16 dx = *points++;
x += (flags & 16) ? dx : -dx; } else {
if (!(flags & 16)) {
x = x + (stbtt_int16) (points[0]*256 + points[1]);
points += 2;
}
}
vertices[off+i].x = (stbtt_int16) x;
}
y=0;
for (i=0; i < n; ++i) {
flags = vertices[off+i].type;
if (flags & 4) {
stbtt_int16 dy = *points++;
y += (flags & 32) ? dy : -dy; } else {
if (!(flags & 32)) {
y = y + (stbtt_int16) (points[0]*256 + points[1]);
points += 2;
}
}
vertices[off+i].y = (stbtt_int16) y;
}
num_vertices=0;
sx = sy = cx = cy = scx = scy = 0;
for (i=0; i < n; ++i) {
flags = vertices[off+i].type;
x = (stbtt_int16) vertices[off+i].x;
y = (stbtt_int16) vertices[off+i].y;
if (next_move == i) {
if (i != 0)
num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy);
start_off = !(flags & 1);
if (start_off) {
scx = x;
scy = y;
if (!(vertices[off+i+1].type & 1)) {
sx = (x + (stbtt_int32) vertices[off+i+1].x) >> 1;
sy = (y + (stbtt_int32) vertices[off+i+1].y) >> 1;
} else {
sx = (stbtt_int32) vertices[off+i+1].x;
sy = (stbtt_int32) vertices[off+i+1].y;
++i; }
} else {
sx = x;
sy = y;
}
stbtt_setvertex(&vertices[num_vertices++], STBTT_vmove,sx,sy,0,0);
was_off = 0;
next_move = 1 + ttUSHORT(endPtsOfContours+j*2);
++j;
} else {
if (!(flags & 1)) { if (was_off) stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+x)>>1, (cy+y)>>1, cx, cy);
cx = x;
cy = y;
was_off = 1;
} else {
if (was_off)
stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, x,y, cx, cy);
else
stbtt_setvertex(&vertices[num_vertices++], STBTT_vline, x,y,0,0);
was_off = 0;
}
}
}
num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy);
} else if (numberOfContours == -1) {
int more = 1;
stbtt_uint8 *comp = data + g + 10;
num_vertices = 0;
vertices = 0;
while (more) {
stbtt_uint16 flags, gidx;
int comp_num_verts = 0, i;
stbtt_vertex *comp_verts = 0, *tmp = 0;
float mtx[6] = {1,0,0,1,0,0}, m, n;
flags = ttSHORT(comp); comp+=2;
gidx = ttSHORT(comp); comp+=2;
if (flags & 2) { if (flags & 1) { mtx[4] = ttSHORT(comp); comp+=2;
mtx[5] = ttSHORT(comp); comp+=2;
} else {
mtx[4] = ttCHAR(comp); comp+=1;
mtx[5] = ttCHAR(comp); comp+=1;
}
}
else {
STBTT_assert(0);
}
if (flags & (1<<3)) { mtx[0] = mtx[3] = ttSHORT(comp)/16384.0f; comp+=2;
mtx[1] = mtx[2] = 0;
} else if (flags & (1<<6)) { mtx[0] = ttSHORT(comp)/16384.0f; comp+=2;
mtx[1] = mtx[2] = 0;
mtx[3] = ttSHORT(comp)/16384.0f; comp+=2;
} else if (flags & (1<<7)) { mtx[0] = ttSHORT(comp)/16384.0f; comp+=2;
mtx[1] = ttSHORT(comp)/16384.0f; comp+=2;
mtx[2] = ttSHORT(comp)/16384.0f; comp+=2;
mtx[3] = ttSHORT(comp)/16384.0f; comp+=2;
}
m = (float) STBTT_sqrt(mtx[0]*mtx[0] + mtx[1]*mtx[1]);
n = (float) STBTT_sqrt(mtx[2]*mtx[2] + mtx[3]*mtx[3]);
comp_num_verts = stbtt_GetGlyphShape(info, gidx, &comp_verts);
if (comp_num_verts > 0) {
for (i = 0; i < comp_num_verts; ++i) {
stbtt_vertex* v = &comp_verts[i];
stbtt_vertex_type x,y;
x=v->x; y=v->y;
v->x = (stbtt_vertex_type)(m * (mtx[0]*x + mtx[2]*y + mtx[4]));
v->y = (stbtt_vertex_type)(n * (mtx[1]*x + mtx[3]*y + mtx[5]));
x=v->cx; y=v->cy;
v->cx = (stbtt_vertex_type)(m * (mtx[0]*x + mtx[2]*y + mtx[4]));
v->cy = (stbtt_vertex_type)(n * (mtx[1]*x + mtx[3]*y + mtx[5]));
}
tmp = (stbtt_vertex*)STBTT_malloc((num_vertices+comp_num_verts)*sizeof(stbtt_vertex), info->userdata);
if (!tmp) {
if (vertices) STBTT_free(vertices, info->userdata);
if (comp_verts) STBTT_free(comp_verts, info->userdata);
return 0;
}
if (num_vertices > 0) STBTT_memcpy(tmp, vertices, num_vertices*sizeof(stbtt_vertex));
STBTT_memcpy(tmp+num_vertices, comp_verts, comp_num_verts*sizeof(stbtt_vertex));
if (vertices) STBTT_free(vertices, info->userdata);
vertices = tmp;
STBTT_free(comp_verts, info->userdata);
num_vertices += comp_num_verts;
}
more = flags & (1<<5);
}
} else if (numberOfContours < 0) {
STBTT_assert(0);
} else {
}
*pvertices = vertices;
return num_vertices;
}
STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing)
{
stbtt_uint16 numOfLongHorMetrics = ttUSHORT(info->data+info->hhea + 34);
if (glyph_index < numOfLongHorMetrics) {
if (advanceWidth) *advanceWidth = ttSHORT(info->data + info->hmtx + 4*glyph_index);
if (leftSideBearing) *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*glyph_index + 2);
} else {
if (advanceWidth) *advanceWidth = ttSHORT(info->data + info->hmtx + 4*(numOfLongHorMetrics-1));
if (leftSideBearing) *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*numOfLongHorMetrics + 2*(glyph_index - numOfLongHorMetrics));
}
}
STBTT_DEF int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2)
{
stbtt_uint8 *data = info->data + info->kern;
stbtt_uint32 needle, straw;
int l, r, m;
if (!info->kern)
return 0;
if (ttUSHORT(data+2) < 1) return 0;
if (ttUSHORT(data+8) != 1) return 0;
l = 0;
r = ttUSHORT(data+10) - 1;
needle = glyph1 << 16 | glyph2;
while (l <= r) {
m = (l + r) >> 1;
straw = ttULONG(data+18+(m*6)); if (needle < straw)
r = m - 1;
else if (needle > straw)
l = m + 1;
else
return ttSHORT(data+22+(m*6));
}
return 0;
}
STBTT_DEF int stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2)
{
if (!info->kern) return 0;
return stbtt_GetGlyphKernAdvance(info, stbtt_FindGlyphIndex(info,ch1), stbtt_FindGlyphIndex(info,ch2));
}
STBTT_DEF void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing)
{
stbtt_GetGlyphHMetrics(info, stbtt_FindGlyphIndex(info,codepoint), advanceWidth, leftSideBearing);
}
STBTT_DEF void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap)
{
if (ascent ) *ascent = ttSHORT(info->data+info->hhea + 4);
if (descent) *descent = ttSHORT(info->data+info->hhea + 6);
if (lineGap) *lineGap = ttSHORT(info->data+info->hhea + 8);
}
STBTT_DEF void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1)
{
*x0 = ttSHORT(info->data + info->head + 36);
*y0 = ttSHORT(info->data + info->head + 38);
*x1 = ttSHORT(info->data + info->head + 40);
*y1 = ttSHORT(info->data + info->head + 42);
}
STBTT_DEF float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float height)
{
int fheight = ttSHORT(info->data + info->hhea + 4) - ttSHORT(info->data + info->hhea + 6);
return (float) height / fheight;
}
STBTT_DEF float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels)
{
int unitsPerEm = ttUSHORT(info->data + info->head + 18);
return pixels / unitsPerEm;
}
STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v)
{
STBTT_free(v, info->userdata);
}
STBTT_DEF 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)
{
int x0,y0,x1,y1;
if (!stbtt_GetGlyphBox(font, glyph, &x0,&y0,&x1,&y1)) {
if (ix0) *ix0 = 0;
if (iy0) *iy0 = 0;
if (ix1) *ix1 = 0;
if (iy1) *iy1 = 0;
} else {
if (ix0) *ix0 = STBTT_ifloor( x0 * scale_x + shift_x);
if (iy0) *iy0 = STBTT_ifloor(-y1 * scale_y + shift_y);
if (ix1) *ix1 = STBTT_iceil ( x1 * scale_x + shift_x);
if (iy1) *iy1 = STBTT_iceil (-y0 * scale_y + shift_y);
}
}
STBTT_DEF void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
{
stbtt_GetGlyphBitmapBoxSubpixel(font, glyph, scale_x, scale_y,0.0f,0.0f, ix0, iy0, ix1, iy1);
}
STBTT_DEF 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)
{
stbtt_GetGlyphBitmapBoxSubpixel(font, stbtt_FindGlyphIndex(font,codepoint), scale_x, scale_y,shift_x,shift_y, ix0,iy0,ix1,iy1);
}
STBTT_DEF void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
{
stbtt_GetCodepointBitmapBoxSubpixel(font, codepoint, scale_x, scale_y,0.0f,0.0f, ix0,iy0,ix1,iy1);
}
typedef struct stbtt__hheap_chunk
{
struct stbtt__hheap_chunk *next;
} stbtt__hheap_chunk;
typedef struct stbtt__hheap
{
struct stbtt__hheap_chunk *head;
void *first_free;
int num_remaining_in_head_chunk;
} stbtt__hheap;
static void *stbtt__hheap_alloc(stbtt__hheap *hh, size_t size, void *userdata)
{
if (hh->first_free) {
void *p = hh->first_free;
hh->first_free = * (void **) p;
return p;
} else {
if (hh->num_remaining_in_head_chunk == 0) {
int count = (size < 32 ? 2000 : size < 128 ? 800 : 100);
stbtt__hheap_chunk *c = (stbtt__hheap_chunk *) STBTT_malloc(sizeof(stbtt__hheap_chunk) + size * count, userdata);
if (c == NULL)
return NULL;
c->next = hh->head;
hh->head = c;
hh->num_remaining_in_head_chunk = count;
}
--hh->num_remaining_in_head_chunk;
return (char *) (hh->head) + size * hh->num_remaining_in_head_chunk;
}
}
static void stbtt__hheap_free(stbtt__hheap *hh, void *p)
{
*(void **) p = hh->first_free;
hh->first_free = p;
}
static void stbtt__hheap_cleanup(stbtt__hheap *hh, void *userdata)
{
stbtt__hheap_chunk *c = hh->head;
while (c) {
stbtt__hheap_chunk *n = c->next;
STBTT_free(c, userdata);
c = n;
}
}
typedef struct stbtt__edge {
float x0,y0, x1,y1;
int invert;
} stbtt__edge;
typedef struct stbtt__active_edge
{
struct stbtt__active_edge *next;
#if STBTT_RASTERIZER_VERSION==1
int x,dx;
float ey;
int direction;
#elif STBTT_RASTERIZER_VERSION==2
float fx,fdx,fdy;
float direction;
float sy;
float ey;
#else
#error "Unrecognized value of STBTT_RASTERIZER_VERSION"
#endif
} stbtt__active_edge;
#if STBTT_RASTERIZER_VERSION == 1
#define STBTT_FIXSHIFT 10
#define STBTT_FIX (1 << STBTT_FIXSHIFT)
#define STBTT_FIXMASK (STBTT_FIX-1)
static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, int off_x, float start_point, void *userdata)
{
stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata);
float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
if (!z) return z;
if (dxdy < 0)
z->dx = -STBTT_ifloor(STBTT_FIX * -dxdy);
else
z->dx = STBTT_ifloor(STBTT_FIX * dxdy);
z->x = STBTT_ifloor(STBTT_FIX * e->x0 + z->dx * (start_point - e->y0)); z->x -= off_x * STBTT_FIX;
z->ey = e->y1;
z->next = 0;
z->direction = e->invert ? 1 : -1;
return z;
}
#elif STBTT_RASTERIZER_VERSION == 2
static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, int off_x, float start_point, void *userdata)
{
stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata);
float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
if (!z) return z;
z->fdx = dxdy;
z->fdy = (1/dxdy);
z->fx = e->x0 + dxdy * (start_point - e->y0);
z->fx -= off_x;
z->direction = e->invert ? 1.0f : -1.0f;
z->sy = e->y0;
z->ey = e->y1;
z->next = 0;
return z;
}
#else
#error "Unrecognized value of STBTT_RASTERIZER_VERSION"
#endif
#if STBTT_RASTERIZER_VERSION == 1
static void stbtt__fill_active_edges(unsigned char *scanline, int len, stbtt__active_edge *e, int max_weight)
{
int x0=0, w=0;
while (e) {
if (w == 0) {
x0 = e->x; w += e->direction;
} else {
int x1 = e->x; w += e->direction;
if (w == 0) {
int i = x0 >> STBTT_FIXSHIFT;
int j = x1 >> STBTT_FIXSHIFT;
if (i < len && j >= 0) {
if (i == j) {
scanline[i] = scanline[i] + (stbtt_uint8) ((x1 - x0) * max_weight >> STBTT_FIXSHIFT);
} else {
if (i >= 0) scanline[i] = scanline[i] + (stbtt_uint8) (((STBTT_FIX - (x0 & STBTT_FIXMASK)) * max_weight) >> STBTT_FIXSHIFT);
else
i = -1;
if (j < len) scanline[j] = scanline[j] + (stbtt_uint8) (((x1 & STBTT_FIXMASK) * max_weight) >> STBTT_FIXSHIFT);
else
j = len;
for (++i; i < j; ++i) scanline[i] = scanline[i] + (stbtt_uint8) max_weight;
}
}
}
}
e = e->next;
}
}
static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata)
{
stbtt__hheap hh = { 0 };
stbtt__active_edge *active = NULL;
int y,j=0;
int max_weight = (255 / vsubsample); int s; unsigned char scanline_data[512], *scanline;
if (result->w > 512)
scanline = (unsigned char *) STBTT_malloc(result->w, userdata);
else
scanline = scanline_data;
y = off_y * vsubsample;
e[n].y0 = (off_y + result->h) * (float) vsubsample + 1;
while (j < result->h) {
STBTT_memset(scanline, 0, result->w);
for (s=0; s < vsubsample; ++s) {
float scan_y = y + 0.5f;
stbtt__active_edge **step = &active;
while (*step) {
stbtt__active_edge * z = *step;
if (z->ey <= scan_y) {
*step = z->next; STBTT_assert(z->direction);
z->direction = 0;
stbtt__hheap_free(&hh, z);
} else {
z->x += z->dx; step = &((*step)->next); }
}
for(;;) {
int changed=0;
step = &active;
while (*step && (*step)->next) {
if ((*step)->x > (*step)->next->x) {
stbtt__active_edge *t = *step;
stbtt__active_edge *q = t->next;
t->next = q->next;
q->next = t;
*step = q;
changed = 1;
}
step = &(*step)->next;
}
if (!changed) break;
}
while (e->y0 <= scan_y) {
if (e->y1 > scan_y) {
stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y, userdata);
if (active == NULL)
active = z;
else if (z->x < active->x) {
z->next = active;
active = z;
} else {
stbtt__active_edge *p = active;
while (p->next && p->next->x < z->x)
p = p->next;
z->next = p->next;
p->next = z;
}
}
++e;
}
if (active)
stbtt__fill_active_edges(scanline, result->w, active, max_weight);
++y;
}
STBTT_memcpy(result->pixels + j * result->stride, scanline, result->w);
++j;
}
stbtt__hheap_cleanup(&hh, userdata);
if (scanline != scanline_data)
STBTT_free(scanline, userdata);
}
#elif STBTT_RASTERIZER_VERSION == 2
static void stbtt__handle_clipped_edge(float *scanline, int x, stbtt__active_edge *e, float x0, float y0, float x1, float y1)
{
if (y0 == y1) return;
STBTT_assert(y0 < y1);
STBTT_assert(e->sy <= e->ey);
if (y0 > e->ey) return;
if (y1 < e->sy) return;
if (y0 < e->sy) {
x0 += (x1-x0) * (e->sy - y0) / (y1-y0);
y0 = e->sy;
}
if (y1 > e->ey) {
x1 += (x1-x0) * (e->ey - y1) / (y1-y0);
y1 = e->ey;
}
if (x0 == x)
STBTT_assert(x1 <= x+1);
else if (x0 == x+1)
STBTT_assert(x1 >= x);
else if (x0 <= x)
STBTT_assert(x1 <= x);
else if (x0 >= x+1)
STBTT_assert(x1 >= x+1);
else
STBTT_assert(x1 >= x && x1 <= x+1);
if (x0 <= x && x1 <= x)
scanline[x] += e->direction * (y1-y0);
else if (x0 >= x+1 && x1 >= x+1)
;
else {
STBTT_assert(x0 >= x && x0 <= x+1 && x1 >= x && x1 <= x+1);
scanline[x] += e->direction * (y1-y0) * (1-((x0-x)+(x1-x))/2); }
}
static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill, int len, stbtt__active_edge *e, float y_top)
{
float y_bottom = y_top+1;
while (e) {
STBTT_assert(e->ey >= y_top);
if (e->fdx == 0) {
float x0 = e->fx;
if (x0 < len) {
if (x0 >= 0) {
stbtt__handle_clipped_edge(scanline,(int) x0,e, x0,y_top, x0,y_bottom);
stbtt__handle_clipped_edge(scanline_fill-1,(int) x0+1,e, x0,y_top, x0,y_bottom);
} else {
stbtt__handle_clipped_edge(scanline_fill-1,0,e, x0,y_top, x0,y_bottom);
}
}
} else {
float x0 = e->fx;
float dx = e->fdx;
float xb = x0 + dx;
float x_top, x_bottom;
float y0,y1;
float dy = e->fdy;
STBTT_assert(e->sy <= y_bottom && e->ey >= y_top);
if (e->sy > y_top) {
x_top = x0 + dx * (e->sy - y_top);
y0 = e->sy;
} else {
x_top = x0;
y0 = y_top;
}
if (e->ey < y_bottom) {
x_bottom = x0 + dx * (e->ey - y_top);
y1 = e->ey;
} else {
x_bottom = xb;
y1 = y_bottom;
}
if (x_top >= 0 && x_bottom >= 0 && x_top < len && x_bottom < len) {
if ((int) x_top == (int) x_bottom) {
float height;
int x = (int) x_top;
height = y1 - y0;
STBTT_assert(x >= 0 && x < len);
scanline[x] += e->direction * (1-((x_top - x) + (x_bottom-x))/2) * height;
scanline_fill[x] += e->direction * height; } else {
int x,x1,x2;
float y_crossing, step, sign, area;
if (x_top > x_bottom) {
float t;
y0 = y_bottom - (y0 - y_top);
y1 = y_bottom - (y1 - y_top);
t = y0, y0 = y1, y1 = t;
t = x_bottom, x_bottom = x_top, x_top = t;
dx = -dx;
dy = -dy;
t = x0, x0 = xb, xb = t;
}
x1 = (int) x_top;
x2 = (int) x_bottom;
y_crossing = (x1+1 - x0) * dy + y_top;
sign = e->direction;
area = sign * (y_crossing-y0);
scanline[x1] += area * (1-((x_top - x1)+(x1+1-x1))/2);
step = sign * dy;
for (x = x1+1; x < x2; ++x) {
scanline[x] += area + step/2;
area += step;
}
y_crossing += dy * (x2 - (x1+1));
STBTT_assert(fabs(area) <= 1.01f);
scanline[x2] += area + sign * (1-((x2-x2)+(x_bottom-x2))/2) * (y1-y_crossing);
scanline_fill[x2] += sign * (y1-y0);
}
} else {
int x;
for (x=0; x < len; ++x) {
float y0 = y_top;
float x1 = (float) (x);
float x2 = (float) (x+1);
float x3 = xb;
float y3 = y_bottom;
float y1,y2;
y1 = (x - x0) / dx + y_top;
y2 = (x+1 - x0) / dx + y_top;
if (x0 < x1 && x3 > x2) { stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1);
stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x2,y2);
stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3);
} else if (x3 < x1 && x0 > x2) { stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2);
stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x1,y1);
stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3);
} else if (x0 < x1 && x3 > x1) { stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1);
stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3);
} else if (x3 < x1 && x0 > x1) { stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1);
stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3);
} else if (x0 < x2 && x3 > x2) { stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2);
stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3);
} else if (x3 < x2 && x0 > x2) { stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2);
stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3);
} else { stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x3,y3);
}
}
}
}
e = e->next;
}
}
static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata)
{
(void)vsubsample;
stbtt__hheap hh = { 0 };
stbtt__active_edge *active = NULL;
int y,j=0, i;
float scanline_data[129], *scanline, *scanline2;
if (result->w > 64)
scanline = (float *) STBTT_malloc((result->w*2+1) * sizeof(float), userdata);
else
scanline = scanline_data;
scanline2 = scanline + result->w;
y = off_y;
e[n].y0 = (float) (off_y + result->h) + 1;
while (j < result->h) {
float scan_y_top = y + 0.0f;
float scan_y_bottom = y + 1.0f;
stbtt__active_edge **step = &active;
STBTT_memset(scanline , 0, result->w*sizeof(scanline[0]));
STBTT_memset(scanline2, 0, (result->w+1)*sizeof(scanline[0]));
while (*step) {
stbtt__active_edge * z = *step;
if (z->ey <= scan_y_top) {
*step = z->next; STBTT_assert(z->direction);
z->direction = 0;
stbtt__hheap_free(&hh, z);
} else {
step = &((*step)->next); }
}
while (e->y0 <= scan_y_bottom) {
stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y_top, userdata);
STBTT_assert(z->ey >= scan_y_top);
z->next = active;
active = z;
++e;
}
if (active)
stbtt__fill_active_edges_new(scanline, scanline2+1, result->w, active, scan_y_top);
{
float sum = 0;
for (i=0; i < result->w; ++i) {
float k;
int m;
sum += scanline2[i];
k = scanline[i] + sum;
k = (float) fabs(k)*255 + 0.5f;
m = (int) k;
if (m > 255) m = 255;
result->pixels[j*result->stride + i] = (unsigned char) m;
}
}
step = &active;
while (*step) {
stbtt__active_edge *z = *step;
z->fx += z->fdx; step = &((*step)->next); }
++y;
++j;
}
stbtt__hheap_cleanup(&hh, userdata);
if (scanline != scanline_data)
STBTT_free(scanline, userdata);
}
#else
#error "Unrecognized value of STBTT_RASTERIZER_VERSION"
#endif
#define STBTT__COMPARE(a,b) ((a)->y0 < (b)->y0)
static void stbtt__sort_edges_ins_sort(stbtt__edge *p, int n)
{
int i,j;
for (i=1; i < n; ++i) {
stbtt__edge t = p[i], *a = &t;
j = i;
while (j > 0) {
stbtt__edge *b = &p[j-1];
int c = STBTT__COMPARE(a,b);
if (!c) break;
p[j] = p[j-1];
--j;
}
if (i != j)
p[j] = t;
}
}
static void stbtt__sort_edges_quicksort(stbtt__edge *p, int n)
{
while (n > 12) {
stbtt__edge t;
int c01,c12,c,m,i,j;
m = n >> 1;
c01 = STBTT__COMPARE(&p[0],&p[m]);
c12 = STBTT__COMPARE(&p[m],&p[n-1]);
if (c01 != c12) {
int z;
c = STBTT__COMPARE(&p[0],&p[n-1]);
z = (c == c12) ? 0 : n-1;
t = p[z];
p[z] = p[m];
p[m] = t;
}
t = p[0];
p[0] = p[m];
p[m] = t;
i=1;
j=n-1;
for(;;) {
for (;;++i) {
if (!STBTT__COMPARE(&p[i], &p[0])) break;
}
for (;;--j) {
if (!STBTT__COMPARE(&p[0], &p[j])) break;
}
if (i >= j) break;
t = p[i];
p[i] = p[j];
p[j] = t;
++i;
--j;
}
if (j < (n-i)) {
stbtt__sort_edges_quicksort(p,j);
p = p+i;
n = n-i;
} else {
stbtt__sort_edges_quicksort(p+i, n-i);
n = j;
}
}
}
static void stbtt__sort_edges(stbtt__edge *p, int n)
{
stbtt__sort_edges_quicksort(p, n);
stbtt__sort_edges_ins_sort(p, n);
}
typedef struct
{
float x,y;
} stbtt__point;
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)
{
float y_scale_inv = invert ? -scale_y : scale_y;
stbtt__edge *e;
int n,i,j,k,m;
#if STBTT_RASTERIZER_VERSION == 1
int vsubsample = result->h < 8 ? 15 : 5;
#elif STBTT_RASTERIZER_VERSION == 2
int vsubsample = 1;
#else
#error "Unrecognized value of STBTT_RASTERIZER_VERSION"
#endif
n = 0;
for (i=0; i < windings; ++i)
n += wcount[i];
e = (stbtt__edge *) STBTT_malloc(sizeof(*e) * (n+1), userdata); if (e == 0) return;
n = 0;
m=0;
for (i=0; i < windings; ++i) {
stbtt__point *p = pts + m;
m += wcount[i];
j = wcount[i]-1;
for (k=0; k < wcount[i]; j=k++) {
int a=k,b=j;
if (p[j].y == p[k].y)
continue;
e[n].invert = 0;
if (invert ? p[j].y > p[k].y : p[j].y < p[k].y) {
e[n].invert = 1;
a=j,b=k;
}
e[n].x0 = p[a].x * scale_x + shift_x;
e[n].y0 = (p[a].y * y_scale_inv + shift_y) * vsubsample;
e[n].x1 = p[b].x * scale_x + shift_x;
e[n].y1 = (p[b].y * y_scale_inv + shift_y) * vsubsample;
++n;
}
}
stbtt__sort_edges(e, n);
stbtt__rasterize_sorted_edges(result, e, n, vsubsample, off_x, off_y, userdata);
STBTT_free(e, userdata);
}
static void stbtt__add_point(stbtt__point *points, int n, float x, float y)
{
if (!points) return; points[n].x = x;
points[n].y = y;
}
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)
{
float mx = (x0 + 2*x1 + x2)/4;
float my = (y0 + 2*y1 + y2)/4;
float dx = (x0+x2)/2 - mx;
float dy = (y0+y2)/2 - my;
if (n > 16) return 1;
if (dx*dx+dy*dy > objspace_flatness_squared) { stbtt__tesselate_curve(points, num_points, x0,y0, (x0+x1)/2.0f,(y0+y1)/2.0f, mx,my, objspace_flatness_squared,n+1);
stbtt__tesselate_curve(points, num_points, mx,my, (x1+x2)/2.0f,(y1+y2)/2.0f, x2,y2, objspace_flatness_squared,n+1);
} else {
stbtt__add_point(points, *num_points,x2,y2);
*num_points = *num_points+1;
}
return 1;
}
static stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts, float objspace_flatness, int **contour_lengths, int *num_contours, void *userdata)
{
stbtt__point *points=0;
int num_points=0;
float objspace_flatness_squared = objspace_flatness * objspace_flatness;
int i,n=0,start=0, pass;
for (i=0; i < num_verts; ++i)
if (vertices[i].type == STBTT_vmove)
++n;
*num_contours = n;
if (n == 0) return 0;
*contour_lengths = (int *) STBTT_malloc(sizeof(**contour_lengths) * n, userdata);
if (*contour_lengths == 0) {
*num_contours = 0;
return 0;
}
for (pass=0; pass < 2; ++pass) {
float x=0,y=0;
if (pass == 1) {
points = (stbtt__point *) STBTT_malloc(num_points * sizeof(points[0]), userdata);
if (points == NULL) goto error;
}
num_points = 0;
n= -1;
for (i=0; i < num_verts; ++i) {
switch (vertices[i].type) {
case STBTT_vmove:
if (n >= 0)
(*contour_lengths)[n] = num_points - start;
++n;
start = num_points;
x = vertices[i].x, y = vertices[i].y;
stbtt__add_point(points, num_points++, x,y);
break;
case STBTT_vline:
x = vertices[i].x, y = vertices[i].y;
stbtt__add_point(points, num_points++, x, y);
break;
case STBTT_vcurve:
stbtt__tesselate_curve(points, &num_points, x,y,
vertices[i].cx, vertices[i].cy,
vertices[i].x, vertices[i].y,
objspace_flatness_squared, 0);
x = vertices[i].x, y = vertices[i].y;
break;
}
}
(*contour_lengths)[n] = num_points - start;
}
return points;
error:
STBTT_free(points, userdata);
STBTT_free(*contour_lengths, userdata);
*contour_lengths = 0;
*num_contours = 0;
return NULL;
}
STBTT_DEF 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)
{
float scale = scale_x > scale_y ? scale_y : scale_x;
int winding_count, *winding_lengths;
stbtt__point *windings = stbtt_FlattenCurves(vertices, num_verts, flatness_in_pixels / scale, &winding_lengths, &winding_count, userdata);
if (windings) {
stbtt__rasterize(result, windings, winding_lengths, winding_count, scale_x, scale_y, shift_x, shift_y, x_off, y_off, invert, userdata);
STBTT_free(winding_lengths, userdata);
STBTT_free(windings, userdata);
}
}
STBTT_DEF void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata)
{
STBTT_free(bitmap, userdata);
}
STBTT_DEF 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)
{
int ix0,iy0,ix1,iy1;
stbtt__bitmap gbm;
stbtt_vertex *vertices;
int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices);
if (scale_x == 0) scale_x = scale_y;
if (scale_y == 0) {
if (scale_x == 0) return NULL;
scale_y = scale_x;
}
stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,&ix1,&iy1);
gbm.w = (ix1 - ix0);
gbm.h = (iy1 - iy0);
gbm.pixels = NULL;
if (width ) *width = gbm.w;
if (height) *height = gbm.h;
if (xoff ) *xoff = ix0;
if (yoff ) *yoff = iy0;
if (gbm.w && gbm.h) {
gbm.pixels = (unsigned char *) STBTT_malloc(gbm.w * gbm.h, info->userdata);
if (gbm.pixels) {
gbm.stride = gbm.w;
stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0, iy0, 1, info->userdata);
}
}
STBTT_free(vertices, info->userdata);
return gbm.pixels;
}
STBTT_DEF unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff)
{
return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y, 0.0f, 0.0f, glyph, width, height, xoff, yoff);
}
STBTT_DEF 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)
{
int ix0,iy0;
stbtt_vertex *vertices;
int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices);
stbtt__bitmap gbm;
stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,0,0);
gbm.pixels = output;
gbm.w = out_w;
gbm.h = out_h;
gbm.stride = out_stride;
if (gbm.w && gbm.h)
stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0,iy0, 1, info->userdata);
STBTT_free(vertices, info->userdata);
}
STBTT_DEF 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)
{
stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, glyph);
}
STBTT_DEF 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)
{
return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y,shift_x,shift_y, stbtt_FindGlyphIndex(info,codepoint), width,height,xoff,yoff);
}
STBTT_DEF 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)
{
stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, shift_x, shift_y, stbtt_FindGlyphIndex(info,codepoint));
}
STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff)
{
return stbtt_GetCodepointBitmapSubpixel(info, scale_x, scale_y, 0.0f,0.0f, codepoint, width,height,xoff,yoff);
}
STBTT_DEF 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)
{
stbtt_MakeCodepointBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, codepoint);
}
STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset, float pixel_height, unsigned char *pixels, int pw, int ph, int first_char, int num_chars, stbtt_bakedchar *chardata)
{
float scale;
int x,y,bottom_y, i;
stbtt_fontinfo f;
if (!stbtt_InitFont(&f, data, offset))
return -1;
STBTT_memset(pixels, 0, pw*ph); x=y=1;
bottom_y = 1;
scale = stbtt_ScaleForPixelHeight(&f, pixel_height);
for (i=0; i < num_chars; ++i) {
int advance, lsb, x0,y0,x1,y1,gw,gh;
int g = stbtt_FindGlyphIndex(&f, first_char + i);
stbtt_GetGlyphHMetrics(&f, g, &advance, &lsb);
stbtt_GetGlyphBitmapBox(&f, g, scale,scale, &x0,&y0,&x1,&y1);
gw = x1-x0;
gh = y1-y0;
if (x + gw + 1 >= pw)
y = bottom_y, x = 1; if (y + gh + 1 >= ph) return -i;
STBTT_assert(x+gw < pw);
STBTT_assert(y+gh < ph);
stbtt_MakeGlyphBitmap(&f, pixels+x+y*pw, gw,gh,pw, scale,scale, g);
chardata[i].x0 = (stbtt_int16) x;
chardata[i].y0 = (stbtt_int16) y;
chardata[i].x1 = (stbtt_int16) (x + gw);
chardata[i].y1 = (stbtt_int16) (y + gh);
chardata[i].xadvance = scale * advance;
chardata[i].xoff = (float) x0;
chardata[i].yoff = (float) y0;
x = x + gw + 1;
if (y+gh+1 > bottom_y)
bottom_y = y+gh+1;
}
return bottom_y;
}
STBTT_DEF void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int opengl_fillrule)
{
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) + 0.5f);
int round_y = STBTT_ifloor((*ypos + b->yoff) + 0.5f);
q->x0 = round_x + d3d_bias;
q->y0 = round_y + d3d_bias;
q->x1 = round_x + b->x1 - b->x0 + d3d_bias;
q->y1 = round_y + b->y1 - b->y0 + d3d_bias;
q->s0 = b->x0 * ipw;
q->t0 = b->y0 * iph;
q->s1 = b->x1 * ipw;
q->t1 = b->y1 * iph;
*xpos += b->xadvance;
}
#ifndef STB_RECT_PACK_VERSION
#ifdef _MSC_VER
#define STBTT__NOTUSED(v) (void)(v)
#else
#define STBTT__NOTUSED(v) (void)sizeof(v)
#endif
typedef int stbrp_coord;
typedef struct
{
int width,height;
int x,y,bottom_y;
} stbrp_context;
typedef struct
{
unsigned char x;
} stbrp_node;
struct stbrp_rect
{
stbrp_coord x,y;
int id,w,h,was_packed;
};
static void stbrp_init_target(stbrp_context *con, int pw, int ph, stbrp_node *nodes, int num_nodes)
{
con->width = pw;
con->height = ph;
con->x = 0;
con->y = 0;
con->bottom_y = 0;
STBTT__NOTUSED(nodes);
STBTT__NOTUSED(num_nodes);
}
static void stbrp_pack_rects(stbrp_context *con, stbrp_rect *rects, int num_rects)
{
int i;
for (i=0; i < num_rects; ++i) {
if (con->x + rects[i].w > con->width) {
con->x = 0;
con->y = con->bottom_y;
}
if (con->y + rects[i].h > con->height)
break;
rects[i].x = con->x;
rects[i].y = con->y;
rects[i].was_packed = 1;
con->x += rects[i].w;
if (con->y + rects[i].h > con->bottom_y)
con->bottom_y = con->y + rects[i].h;
}
for ( ; i < num_rects; ++i)
rects[i].was_packed = 0;
}
#endif
STBTT_DEF int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int pw, int ph, int stride_in_bytes, int padding, void *alloc_context)
{
stbrp_context *context = (stbrp_context *) STBTT_malloc(sizeof(*context) ,alloc_context);
int num_nodes = pw - padding;
stbrp_node *nodes = (stbrp_node *) STBTT_malloc(sizeof(*nodes ) * num_nodes,alloc_context);
if (context == NULL || nodes == NULL) {
if (context != NULL) STBTT_free(context, alloc_context);
if (nodes != NULL) STBTT_free(nodes , alloc_context);
return 0;
}
spc->user_allocator_context = alloc_context;
spc->width = pw;
spc->height = ph;
spc->pixels = pixels;
spc->pack_info = context;
spc->nodes = nodes;
spc->padding = padding;
spc->stride_in_bytes = stride_in_bytes != 0 ? stride_in_bytes : pw;
spc->h_oversample = 1;
spc->v_oversample = 1;
stbrp_init_target(context, pw-padding, ph-padding, nodes, num_nodes);
if (pixels)
STBTT_memset(pixels, 0, pw*ph);
return 1;
}
STBTT_DEF void stbtt_PackEnd (stbtt_pack_context *spc)
{
STBTT_free(spc->nodes , spc->user_allocator_context);
STBTT_free(spc->pack_info, spc->user_allocator_context);
}
STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample)
{
STBTT_assert(h_oversample <= STBTT_MAX_OVERSAMPLE);
STBTT_assert(v_oversample <= STBTT_MAX_OVERSAMPLE);
if (h_oversample <= STBTT_MAX_OVERSAMPLE)
spc->h_oversample = h_oversample;
if (v_oversample <= STBTT_MAX_OVERSAMPLE)
spc->v_oversample = v_oversample;
}
#define STBTT__OVER_MASK (STBTT_MAX_OVERSAMPLE-1)
static void stbtt__h_prefilter(unsigned char *pixels, int w, int h, int stride_in_bytes, unsigned int kernel_width)
{
unsigned char buffer[STBTT_MAX_OVERSAMPLE];
int safe_w = w - kernel_width;
int j;
for (j=0; j < h; ++j) {
int i;
unsigned int total;
STBTT_memset(buffer, 0, kernel_width);
total = 0;
switch (kernel_width) {
case 2:
for (i=0; i <= safe_w; ++i) {
total += pixels[i] - buffer[i & STBTT__OVER_MASK];
buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
pixels[i] = (unsigned char) (total / 2);
}
break;
case 3:
for (i=0; i <= safe_w; ++i) {
total += pixels[i] - buffer[i & STBTT__OVER_MASK];
buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
pixels[i] = (unsigned char) (total / 3);
}
break;
case 4:
for (i=0; i <= safe_w; ++i) {
total += pixels[i] - buffer[i & STBTT__OVER_MASK];
buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
pixels[i] = (unsigned char) (total / 4);
}
break;
case 5:
for (i=0; i <= safe_w; ++i) {
total += pixels[i] - buffer[i & STBTT__OVER_MASK];
buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
pixels[i] = (unsigned char) (total / 5);
}
break;
default:
for (i=0; i <= safe_w; ++i) {
total += pixels[i] - buffer[i & STBTT__OVER_MASK];
buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
pixels[i] = (unsigned char) (total / kernel_width);
}
break;
}
for (; i < w; ++i) {
STBTT_assert(pixels[i] == 0);
total -= buffer[i & STBTT__OVER_MASK];
pixels[i] = (unsigned char) (total / kernel_width);
}
pixels += stride_in_bytes;
}
}
static void stbtt__v_prefilter(unsigned char *pixels, int w, int h, int stride_in_bytes, unsigned int kernel_width)
{
unsigned char buffer[STBTT_MAX_OVERSAMPLE];
int safe_h = h - kernel_width;
int j;
for (j=0; j < w; ++j) {
int i;
unsigned int total;
STBTT_memset(buffer, 0, kernel_width);
total = 0;
switch (kernel_width) {
case 2:
for (i=0; i <= safe_h; ++i) {
total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
pixels[i*stride_in_bytes] = (unsigned char) (total / 2);
}
break;
case 3:
for (i=0; i <= safe_h; ++i) {
total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
pixels[i*stride_in_bytes] = (unsigned char) (total / 3);
}
break;
case 4:
for (i=0; i <= safe_h; ++i) {
total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
pixels[i*stride_in_bytes] = (unsigned char) (total / 4);
}
break;
case 5:
for (i=0; i <= safe_h; ++i) {
total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
pixels[i*stride_in_bytes] = (unsigned char) (total / 5);
}
break;
default:
for (i=0; i <= safe_h; ++i) {
total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
pixels[i*stride_in_bytes] = (unsigned char) (total / kernel_width);
}
break;
}
for (; i < h; ++i) {
STBTT_assert(pixels[i*stride_in_bytes] == 0);
total -= buffer[i & STBTT__OVER_MASK];
pixels[i*stride_in_bytes] = (unsigned char) (total / kernel_width);
}
pixels += 1;
}
}
static float stbtt__oversample_shift(int oversample)
{
if (!oversample)
return 0.0f;
return (float)-(oversample - 1) / (2.0f * (float)oversample);
}
STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
{
int i,j,k;
k=0;
for (i=0; i < num_ranges; ++i) {
float fh = ranges[i].font_size;
float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh);
ranges[i].h_oversample = (unsigned char) spc->h_oversample;
ranges[i].v_oversample = (unsigned char) spc->v_oversample;
for (j=0; j < ranges[i].num_chars; ++j) {
int x0,y0,x1,y1;
int codepoint = ranges[i].first_unicode_codepoint_in_range ? ranges[i].first_unicode_codepoint_in_range + j : ranges[i].array_of_unicode_codepoints[j];
int glyph = stbtt_FindGlyphIndex(info, codepoint);
stbtt_GetGlyphBitmapBoxSubpixel(info,glyph,
scale * spc->h_oversample,
scale * spc->v_oversample,
0,0,
&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);
++k;
}
}
return k;
}
STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
{
int i,j,k, return_value = 1;
int old_h_over = spc->h_oversample;
int old_v_over = spc->v_oversample;
k = 0;
for (i=0; i < num_ranges; ++i) {
float fh = ranges[i].font_size;
float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh);
float recip_h,recip_v,sub_x,sub_y;
spc->h_oversample = ranges[i].h_oversample;
spc->v_oversample = ranges[i].v_oversample;
recip_h = 1.0f / spc->h_oversample;
recip_v = 1.0f / spc->v_oversample;
sub_x = stbtt__oversample_shift(spc->h_oversample);
sub_y = stbtt__oversample_shift(spc->v_oversample);
for (j=0; j < ranges[i].num_chars; ++j) {
stbrp_rect *r = &rects[k];
if (r->was_packed) {
stbtt_packedchar *bc = &ranges[i].chardata_for_range[j];
int advance, lsb, x0,y0,x1,y1;
int codepoint = ranges[i].first_unicode_codepoint_in_range ? ranges[i].first_unicode_codepoint_in_range + j : ranges[i].array_of_unicode_codepoints[j];
int glyph = stbtt_FindGlyphIndex(info, codepoint);
stbrp_coord pad = (stbrp_coord) spc->padding;
r->x += pad;
r->y += pad;
r->w -= pad;
r->h -= pad;
stbtt_GetGlyphHMetrics(info, glyph, &advance, &lsb);
stbtt_GetGlyphBitmapBox(info, glyph,
scale * spc->h_oversample,
scale * spc->v_oversample,
&x0,&y0,&x1,&y1);
stbtt_MakeGlyphBitmapSubpixel(info,
spc->pixels + r->x + r->y*spc->stride_in_bytes,
r->w - spc->h_oversample+1,
r->h - spc->v_oversample+1,
spc->stride_in_bytes,
scale * spc->h_oversample,
scale * spc->v_oversample,
0,0,
glyph);
if (spc->h_oversample > 1)
stbtt__h_prefilter(spc->pixels + r->x + r->y*spc->stride_in_bytes,
r->w, r->h, spc->stride_in_bytes,
spc->h_oversample);
if (spc->v_oversample > 1)
stbtt__v_prefilter(spc->pixels + r->x + r->y*spc->stride_in_bytes,
r->w, r->h, spc->stride_in_bytes,
spc->v_oversample);
bc->x0 = (stbtt_int16) r->x;
bc->y0 = (stbtt_int16) r->y;
bc->x1 = (stbtt_int16) (r->x + r->w);
bc->y1 = (stbtt_int16) (r->y + r->h);
bc->xadvance = scale * advance;
bc->xoff = (float) x0 * recip_h + sub_x;
bc->yoff = (float) y0 * recip_v + sub_y;
bc->xoff2 = (x0 + r->w) * recip_h + sub_x;
bc->yoff2 = (y0 + r->h) * recip_v + sub_y;
} else {
return_value = 0; }
++k;
}
}
spc->h_oversample = old_h_over;
spc->v_oversample = old_v_over;
return return_value;
}
STBTT_DEF void stbtt_PackFontRangesPackRects(stbtt_pack_context *spc, stbrp_rect *rects, int num_rects)
{
stbrp_pack_rects((stbrp_context *) spc->pack_info, rects, num_rects);
}
STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges)
{
stbtt_fontinfo info;
int i,j,n, return_value = 1;
stbrp_rect *rects;
for (i=0; i < num_ranges; ++i)
for (j=0; j < ranges[i].num_chars; ++j)
ranges[i].chardata_for_range[j].x0 =
ranges[i].chardata_for_range[j].y0 =
ranges[i].chardata_for_range[j].x1 =
ranges[i].chardata_for_range[j].y1 = 0;
n = 0;
for (i=0; i < num_ranges; ++i)
n += ranges[i].num_chars;
rects = (stbrp_rect *) STBTT_malloc(sizeof(*rects) * n, spc->user_allocator_context);
if (rects == NULL)
return 0;
stbtt_InitFont(&info, fontdata, stbtt_GetFontOffsetForIndex(fontdata,font_index));
n = stbtt_PackFontRangesGatherRects(spc, &info, ranges, num_ranges, rects);
stbtt_PackFontRangesPackRects(spc, rects, n);
return_value = stbtt_PackFontRangesRenderIntoRects(spc, &info, ranges, num_ranges, rects);
STBTT_free(rects, spc->user_allocator_context);
return return_value;
}
STBTT_DEF int stbtt_PackFontRange(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, float font_size,
int first_unicode_codepoint_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range)
{
stbtt_pack_range range;
range.first_unicode_codepoint_in_range = first_unicode_codepoint_in_range;
range.array_of_unicode_codepoints = NULL;
range.num_chars = num_chars_in_range;
range.chardata_for_range = chardata_for_range;
range.font_size = font_size;
return stbtt_PackFontRanges(spc, fontdata, font_index, &range, 1);
}
STBTT_DEF void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int align_to_integer)
{
float ipw = 1.0f / pw, iph = 1.0f / ph;
stbtt_packedchar *b = chardata + char_index;
if (align_to_integer) {
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;
q->y1 = y + b->yoff2 - b->yoff;
} else {
q->x0 = *xpos + b->xoff;
q->y0 = *ypos + b->yoff;
q->x1 = *xpos + b->xoff2;
q->y1 = *ypos + b->yoff2;
}
q->s0 = b->x0 * ipw;
q->t0 = b->y0 * iph;
q->s1 = b->x1 * ipw;
q->t1 = b->y1 * iph;
*xpos += b->xadvance;
}
static stbtt_int32 stbtt__CompareUTF8toUTF16_bigendian_prefix(const stbtt_uint8 *s1, stbtt_int32 len1, const stbtt_uint8 *s2, stbtt_int32 len2)
{
stbtt_int32 i=0;
while (len2) {
stbtt_uint16 ch = s2[0]*256 + s2[1];
if (ch < 0x80) {
if (i >= len1) return -1;
if (s1[i++] != ch) return -1;
} else if (ch < 0x800) {
if (i+1 >= len1) return -1;
if (s1[i++] != 0xc0 + (ch >> 6)) return -1;
if (s1[i++] != 0x80 + (ch & 0x3f)) return -1;
} else if (ch >= 0xd800 && ch < 0xdc00) {
stbtt_uint32 c;
stbtt_uint16 ch2 = s2[2]*256 + s2[3];
if (i+3 >= len1) return -1;
c = ((ch - 0xd800) << 10) + (ch2 - 0xdc00) + 0x10000;
if (s1[i++] != 0xf0 + (c >> 18)) return -1;
if (s1[i++] != 0x80 + ((c >> 12) & 0x3f)) return -1;
if (s1[i++] != 0x80 + ((c >> 6) & 0x3f)) return -1;
if (s1[i++] != 0x80 + ((c ) & 0x3f)) return -1;
s2 += 2; len2 -= 2;
} else if (ch >= 0xdc00 && ch < 0xe000) {
return -1;
} else {
if (i+2 >= len1) return -1;
if (s1[i++] != 0xe0 + (ch >> 12)) return -1;
if (s1[i++] != 0x80 + ((ch >> 6) & 0x3f)) return -1;
if (s1[i++] != 0x80 + ((ch ) & 0x3f)) return -1;
}
s2 += 2;
len2 -= 2;
}
return i;
}
STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2)
{
return len1 == stbtt__CompareUTF8toUTF16_bigendian_prefix((const stbtt_uint8*) s1, len1, (const stbtt_uint8*) s2, len2);
}
STBTT_DEF const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID)
{
stbtt_int32 i,count,stringOffset;
stbtt_uint8 *fc = font->data;
stbtt_uint32 offset = font->fontstart;
stbtt_uint32 nm = stbtt__find_table(fc, offset, "name");
if (!nm) return NULL;
count = ttUSHORT(fc+nm+2);
stringOffset = nm + ttUSHORT(fc+nm+4);
for (i=0; i < count; ++i) {
stbtt_uint32 loc = nm + 6 + 12 * i;
if (platformID == ttUSHORT(fc+loc+0) && encodingID == ttUSHORT(fc+loc+2)
&& languageID == ttUSHORT(fc+loc+4) && nameID == ttUSHORT(fc+loc+6)) {
*length = ttUSHORT(fc+loc+8);
return (const char *) (fc+stringOffset+ttUSHORT(fc+loc+10));
}
}
return NULL;
}
static int stbtt__matchpair(stbtt_uint8 *fc, stbtt_uint32 nm, stbtt_uint8 *name, stbtt_int32 nlen, stbtt_int32 target_id, stbtt_int32 next_id)
{
stbtt_int32 i;
stbtt_int32 count = ttUSHORT(fc+nm+2);
stbtt_int32 stringOffset = nm + ttUSHORT(fc+nm+4);
for (i=0; i < count; ++i) {
stbtt_uint32 loc = nm + 6 + 12 * i;
stbtt_int32 id = ttUSHORT(fc+loc+6);
if (id == target_id) {
stbtt_int32 platform = ttUSHORT(fc+loc+0), encoding = ttUSHORT(fc+loc+2), language = ttUSHORT(fc+loc+4);
if (platform == 0 || (platform == 3 && encoding == 1) || (platform == 3 && encoding == 10)) {
stbtt_int32 slen = ttUSHORT(fc+loc+8);
stbtt_int32 off = ttUSHORT(fc+loc+10);
stbtt_int32 matchlen = stbtt__CompareUTF8toUTF16_bigendian_prefix(name, nlen, fc+stringOffset+off,slen);
if (matchlen >= 0) {
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) {
slen = ttUSHORT(fc+loc+12+8);
off = ttUSHORT(fc+loc+12+10);
if (slen == 0) {
if (matchlen == nlen)
return 1;
} else if (matchlen < nlen && name[matchlen] == ' ') {
++matchlen;
if (stbtt_CompareUTF8toUTF16_bigendian((char*) (name+matchlen), nlen-matchlen, (char*)(fc+stringOffset+off),slen))
return 1;
}
} else {
if (matchlen == nlen)
return 1;
}
}
}
}
}
return 0;
}
static int stbtt__matches(stbtt_uint8 *fc, stbtt_uint32 offset, stbtt_uint8 *name, stbtt_int32 flags)
{
stbtt_int32 nlen = (stbtt_int32) STBTT_strlen((char *) name);
stbtt_uint32 nm,hd;
if (!stbtt__isfont(fc+offset)) return 0;
if (flags) {
hd = stbtt__find_table(fc, offset, "head");
if ((ttUSHORT(fc+hd+44) & 7) != (flags & 7)) return 0;
}
nm = stbtt__find_table(fc, offset, "name");
if (!nm) return 0;
if (flags) {
if (stbtt__matchpair(fc, nm, name, nlen, 16, -1)) return 1;
if (stbtt__matchpair(fc, nm, name, nlen, 1, -1)) return 1;
if (stbtt__matchpair(fc, nm, name, nlen, 3, -1)) return 1;
} else {
if (stbtt__matchpair(fc, nm, name, nlen, 16, 17)) return 1;
if (stbtt__matchpair(fc, nm, name, nlen, 1, 2)) return 1;
if (stbtt__matchpair(fc, nm, name, nlen, 3, -1)) return 1;
}
return 0;
}
STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *font_collection, const char *name_utf8, stbtt_int32 flags)
{
stbtt_int32 i;
for (i=0;;++i) {
stbtt_int32 off = stbtt_GetFontOffsetForIndex(font_collection, i);
if (off < 0) return off;
if (stbtt__matches((stbtt_uint8 *) font_collection, off, (stbtt_uint8*) name_utf8, flags))
return off;
}
}
#endif