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stblib: Update stb_truetype from v1.21 to v1.24

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Ani 2021-04-30 03:45:58 +01:00
parent 9b083f801c
commit 18e1b45388
1 changed files with 206 additions and 77 deletions
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177
3rdparty/stblib/stb_truetype.h vendored
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@ -1,5 +1,14 @@
// stb_truetype.h - v1.21 - public domain
// authored from 2009-2016 by Sean Barrett / RAD Game Tools
// stb_truetype.h - v1.24 - public domain
// authored from 2009-2020 by Sean Barrett / RAD Game Tools
//
// =======================================================================
//
// NO SECURITY GUARANTEE -- DO NOT USE THIS ON UNTRUSTED FONT FILES
//
// This library does no range checking of the offsets found in the file,
// meaning an attacker can use it to read arbitrary memory.
//
// =======================================================================
//
// This library processes TrueType files:
// parse files
@ -32,11 +41,11 @@
// Daniel Ribeiro Maciel
//
// Bug/warning reports/fixes:
// "Zer" on mollyrocket Fabian "ryg" Giesen
// Cass Everitt Martins Mozeiko
// stoiko (Haemimont Games) Cap Petschulat
// Brian Hook Omar Cornut
// Walter van Niftrik github:aloucks
// "Zer" on mollyrocket Fabian "ryg" Giesen github:NiLuJe
// Cass Everitt Martins Mozeiko github:aloucks
// stoiko (Haemimont Games) Cap Petschulat github:oyvindjam
// Brian Hook Omar Cornut github:vassvik
// Walter van Niftrik Ryan Griege
// David Gow Peter LaValle
// David Given Sergey Popov
// Ivan-Assen Ivanov Giumo X. Clanjor
@ -44,11 +53,14 @@
// Johan Duparc Thomas Fields
// Hou Qiming Derek Vinyard
// Rob Loach Cort Stratton
// Kenney Phillis Jr. github:oyvindjam
// Brian Costabile github:vassvik
// Kenney Phillis Jr. Brian Costabile
// Ken Voskuil (kaesve)
//
// VERSION HISTORY
//
// 1.24 (2020-02-05) fix warning
// 1.23 (2020-02-02) query SVG data for glyphs; query whole kerning table (but only kern not GPOS)
// 1.22 (2019-08-11) minimize missing-glyph duplication; fix kerning if both 'GPOS' and 'kern' are defined
// 1.21 (2019-02-25) fix warning
// 1.20 (2019-02-07) PackFontRange skips missing codepoints; GetScaleFontVMetrics()
// 1.19 (2018-02-11) GPOS kerning, STBTT_fmod
@ -702,7 +714,7 @@ struct stbtt_fontinfo
int numGlyphs; // number of glyphs, needed for range checking
int loca,head,glyf,hhea,hmtx,kern,gpos; // table locations as offset from start of .ttf
int loca,head,glyf,hhea,hmtx,kern,gpos,svg; // table locations as offset from start of .ttf
int index_map; // a cmap mapping for our chosen character encoding
int indexToLocFormat; // format needed to map from glyph index to glyph
@ -785,6 +797,18 @@ STBTT_DEF int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1,
STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1);
// as above, but takes one or more glyph indices for greater efficiency
typedef struct stbtt_kerningentry
{
int glyph1; // use stbtt_FindGlyphIndex
int glyph2;
int advance;
} stbtt_kerningentry;
STBTT_DEF int stbtt_GetKerningTableLength(const stbtt_fontinfo *info);
STBTT_DEF int stbtt_GetKerningTable(const stbtt_fontinfo *info, stbtt_kerningentry* table, int table_length);
// Retrieves a complete list of all of the kerning pairs provided by the font
// stbtt_GetKerningTable never writes more than table_length entries and returns how many entries it did write.
// The table will be sorted by (a.glyph1 == b.glyph1)?(a.glyph2 < b.glyph2):(a.glyph1 < b.glyph1)
//////////////////////////////////////////////////////////////////////////////
//
@ -829,6 +853,11 @@ STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, s
STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *vertices);
// frees the data allocated above
STBTT_DEF int stbtt_GetCodepointSVG(const stbtt_fontinfo *info, int unicode_codepoint, const char **svg);
STBTT_DEF int stbtt_GetGlyphSVG(const stbtt_fontinfo *info, int gl, const char **svg);
// fills svg with the character's SVG data.
// returns data size or 0 if SVG not found.
//////////////////////////////////////////////////////////////////////////////
//
// BITMAP RENDERING
@ -1330,6 +1359,22 @@ static stbtt__buf stbtt__get_subrs(stbtt__buf cff, stbtt__buf fontdict)
return stbtt__cff_get_index(&cff);
}
// since most people won't use this, find this table the first time it's needed
static int stbtt__get_svg(stbtt_fontinfo *info)
{
stbtt_uint32 t;
if (info->svg < 0) {
t = stbtt__find_table(info->data, info->fontstart, "SVG ");
if (t) {
stbtt_uint32 offset = ttULONG(info->data + t + 2);
info->svg = t + offset;
} else {
info->svg = 0;
}
}
return info->svg;
}
static int stbtt_InitFont_internal(stbtt_fontinfo *info, unsigned char *data, int fontstart)
{
stbtt_uint32 cmap, t;
@ -1409,6 +1454,8 @@ static int stbtt_InitFont_internal(stbtt_fontinfo *info, unsigned char *data, in
else
info->numGlyphs = 0xffff;
info->svg = -1;
// find a cmap encoding table we understand *now* to avoid searching
// later. (todo: could make this installable)
// the same regardless of glyph.
@ -1757,7 +1804,7 @@ static int stbtt__GetGlyphShapeTT(const stbtt_fontinfo *info, int glyph_index, s
}
}
num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy);
} else if (numberOfContours == -1) {
} else if (numberOfContours < 0) {
// Compound shapes.
int more = 1;
stbtt_uint8 *comp = data + g + 10;
@ -1834,9 +1881,6 @@ static int stbtt__GetGlyphShapeTT(const stbtt_fontinfo *info, int glyph_index, s
// More components ?
more = flags & (1<<5);
}
} else if (numberOfContours < 0) {
// @TODO other compound variations?
STBTT_assert(0);
} else {
// numberOfCounters == 0, do nothing
}
@ -2265,6 +2309,48 @@ STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_inde
}
}
STBTT_DEF int stbtt_GetKerningTableLength(const stbtt_fontinfo *info)
{
stbtt_uint8 *data = info->data + info->kern;
// we only look at the first table. it must be 'horizontal' and format 0.
if (!info->kern)
return 0;
if (ttUSHORT(data+2) < 1) // number of tables, need at least 1
return 0;
if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format
return 0;
return ttUSHORT(data+10);
}
STBTT_DEF int stbtt_GetKerningTable(const stbtt_fontinfo *info, stbtt_kerningentry* table, int table_length)
{
stbtt_uint8 *data = info->data + info->kern;
int k, length;
// we only look at the first table. it must be 'horizontal' and format 0.
if (!info->kern)
return 0;
if (ttUSHORT(data+2) < 1) // number of tables, need at least 1
return 0;
if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format
return 0;
length = ttUSHORT(data+10);
if (table_length < length)
length = table_length;
for (k = 0; k < length; k++)
{
table[k].glyph1 = ttUSHORT(data+18+(k*6));
table[k].glyph2 = ttUSHORT(data+20+(k*6));
table[k].advance = ttSHORT(data+22+(k*6));
}
return length;
}
static int stbtt__GetGlyphKernInfoAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2)
{
stbtt_uint8 *data = info->data + info->kern;
@ -2540,8 +2626,7 @@ STBTT_DEF int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int g1, int
if (info->gpos)
xAdvance += stbtt__GetGlyphGPOSInfoAdvance(info, g1, g2);
if (info->kern)
else if (info->kern)
xAdvance += stbtt__GetGlyphKernInfoAdvance(info, g1, g2);
return xAdvance;
@ -2602,6 +2687,45 @@ STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v)
STBTT_free(v, info->userdata);
}
STBTT_DEF stbtt_uint8 *stbtt_FindSVGDoc(const stbtt_fontinfo *info, int gl)
{
int i;
stbtt_uint8 *data = info->data;
stbtt_uint8 *svg_doc_list = data + stbtt__get_svg((stbtt_fontinfo *) info);
int numEntries = ttUSHORT(svg_doc_list);
stbtt_uint8 *svg_docs = svg_doc_list + 2;
for(i=0; i<numEntries; i++) {
stbtt_uint8 *svg_doc = svg_docs + (12 * i);
if ((gl >= ttUSHORT(svg_doc)) && (gl <= ttUSHORT(svg_doc + 2)))
return svg_doc;
}
return 0;
}
STBTT_DEF int stbtt_GetGlyphSVG(const stbtt_fontinfo *info, int gl, const char **svg)
{
stbtt_uint8 *data = info->data;
stbtt_uint8 *svg_doc;
if (info->svg == 0)
return 0;
svg_doc = stbtt_FindSVGDoc(info, gl);
if (svg_doc != NULL) {
*svg = (char *) data + info->svg + ttULONG(svg_doc + 4);
return ttULONG(svg_doc + 8);
} else {
return 0;
}
}
STBTT_DEF int stbtt_GetCodepointSVG(const stbtt_fontinfo *info, int unicode_codepoint, const char **svg)
{
return stbtt_GetGlyphSVG(info, stbtt_FindGlyphIndex(info, unicode_codepoint), svg);
}
//////////////////////////////////////////////////////////////////////////////
//
// antialiasing software rasterizer
@ -3968,6 +4092,7 @@ static float stbtt__oversample_shift(int oversample)
STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
{
int i,j,k;
int missing_glyph_added = 0;
k=0;
for (i=0; i < num_ranges; ++i) {
@ -3979,7 +4104,7 @@ STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, const stb
int x0,y0,x1,y1;
int codepoint = ranges[i].array_of_unicode_codepoints == NULL ? ranges[i].first_unicode_codepoint_in_range + j : ranges[i].array_of_unicode_codepoints[j];
int glyph = stbtt_FindGlyphIndex(info, codepoint);
if (glyph == 0 && spc->skip_missing) {
if (glyph == 0 && (spc->skip_missing || missing_glyph_added)) {
rects[k].w = rects[k].h = 0;
} else {
stbtt_GetGlyphBitmapBoxSubpixel(info,glyph,
@ -3989,6 +4114,8 @@ STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, const stb
&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);
if (glyph == 0)
missing_glyph_added = 1;
}
++k;
}
@ -4023,7 +4150,7 @@ STBTT_DEF void stbtt_MakeGlyphBitmapSubpixelPrefilter(const stbtt_fontinfo *info
// rects array must be big enough to accommodate all characters in the given ranges
STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
{
int i,j,k, return_value = 1;
int i,j,k, missing_glyph = -1, return_value = 1;
// save current values
int old_h_over = spc->h_oversample;
@ -4088,6 +4215,13 @@ STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, const
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;
if (glyph == 0)
missing_glyph = j;
} else if (spc->skip_missing) {
return_value = 0;
} else if (r->was_packed && r->w == 0 && r->h == 0 && missing_glyph >= 0) {
ranges[i].chardata_for_range[j] = ranges[i].chardata_for_range[missing_glyph];
} else {
return_value = 0; // if any fail, report failure
}
@ -4389,12 +4523,7 @@ STBTT_DEF unsigned char * stbtt_GetGlyphSDF(const stbtt_fontinfo *info, float sc
int w,h;
unsigned char *data;
// if one scale is 0, use same scale for both
if (scale_x == 0) scale_x = scale_y;
if (scale_y == 0) {
if (scale_x == 0) return NULL; // if both scales are 0, return NULL
scale_y = scale_x;
}
if (scale == 0) return NULL;
stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale, scale, 0.0f,0.0f, &ix0,&iy0,&ix1,&iy1);