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Updated to stb_truetype 1.07 (back to vanilla version as our minor changes are now in master & fix #280)

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ocornut 2015-08-01 07:22:52 -06:00
parent faa609a43c
commit 26a992c6f6
2 changed files with 196 additions and 110 deletions
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10
imgui.cpp
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@ -10058,10 +10058,10 @@ bool ImFontAtlas::Build()
const ImWchar* in_range = &cfg.GlyphRanges[i * 2]; const ImWchar* in_range = &cfg.GlyphRanges[i * 2];
stbtt_pack_range& range = tmp.Ranges[i]; stbtt_pack_range& range = tmp.Ranges[i];
range.font_size = cfg.SizePixels; range.font_size = cfg.SizePixels;
range.first_unicode_char_in_range = in_range[0]; range.first_unicode_codepoint_in_range = in_range[0];
range.num_chars_in_range = (in_range[1] - in_range[0]) + 1; range.num_chars = (in_range[1] - in_range[0]) + 1;
range.chardata_for_range = buf_packedchars + buf_packedchars_n; range.chardata_for_range = buf_packedchars + buf_packedchars_n;
buf_packedchars_n += range.num_chars_in_range; buf_packedchars_n += range.num_chars;
} }
// Pack // Pack
@ -10132,13 +10132,13 @@ bool ImFontAtlas::Build()
for (int i = 0; i < tmp.RangesCount; i++) for (int i = 0; i < tmp.RangesCount; i++)
{ {
stbtt_pack_range& range = tmp.Ranges[i]; stbtt_pack_range& range = tmp.Ranges[i];
for (int char_idx = 0; char_idx < range.num_chars_in_range; char_idx += 1) for (int char_idx = 0; char_idx < range.num_chars; char_idx += 1)
{ {
const stbtt_packedchar& pc = range.chardata_for_range[char_idx]; const stbtt_packedchar& pc = range.chardata_for_range[char_idx];
if (!pc.x0 && !pc.x1 && !pc.y0 && !pc.y1) if (!pc.x0 && !pc.x1 && !pc.y0 && !pc.y1)
continue; continue;
const int codepoint = range.first_unicode_char_in_range + char_idx; const int codepoint = range.first_unicode_codepoint_in_range + char_idx;
if (cfg.MergeMode && dst_font->FindGlyph((unsigned short)codepoint)) if (cfg.MergeMode && dst_font->FindGlyph((unsigned short)codepoint))
continue; continue;

296
stb_truetype.h
View File

@ -1,8 +1,5 @@
// [ImGui] this is a slightly modified version of stb_truetype.h 1.06 // stb_truetype.h - v1.07 - public domain
// [ImGui] we added stbtt_PackFontRangesGatherRects() and stbtt_PackFontRangesRenderIntoRects() and modified stbtt_PackBegin() // authored from 2009-2015 by Sean Barrett / RAD Game Tools
// stb_truetype.h - v1.06 - public domain
// authored from 2009-2014 by Sean Barrett / RAD Game Tools
// //
// This library processes TrueType files: // This library processes TrueType files:
// parse files // parse files
@ -42,52 +39,32 @@
// Omar Cornut // Omar Cornut
// github:aloucks // github:aloucks
// Peter LaValle // Peter LaValle
// Giumo X. Clanjor
// //
// Misc other: // Misc other:
// Ryan Gordon // Ryan Gordon
// //
// VERSION HISTORY // VERSION HISTORY
// //
// 1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints;
// variant PackFontRanges to pack and render in separate phases;
// fix stbtt_GetFontOFfsetForIndex (never worked for non-0 input?);
// fixed an assert() bug in the new rasterizer
// replace assert() with STBTT_assert() in new rasterizer
// 1.06 (2015-07-14) performance improvements (~35% faster on x86 and x64 on test machine) // 1.06 (2015-07-14) performance improvements (~35% faster on x86 and x64 on test machine)
// also more precise AA rasterizer, except if shapes overlap // also more precise AA rasterizer, except if shapes overlap
// remove need for STBTT_sort // remove need for STBTT_sort
// 1.05 (2015-04-15) fix misplaced definitions for STBTT_STATIC // 1.05 (2015-04-15) fix misplaced definitions for STBTT_STATIC
// 1.04 (2015-04-15) typo in example // 1.04 (2015-04-15) typo in example
// 1.03 (2015-04-12) STBTT_STATIC, fix memory leak in new packing, various fixes // 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 // Full history can be found at the end of this file.
// non-oversampled; STBTT_POINT_SIZE for packed case only
// 1.00 (2014-12-06) add new PackBegin etc. API, w/ support for oversampling
// 0.99 (2014-09-18) fix multiple bugs with subpixel rendering (ryg)
// 0.9 (2014-08-07) support certain mac/iOS fonts without an MS platformID
// 0.8b (2014-07-07) fix a warning
// 0.8 (2014-05-25) fix a few more warnings
// 0.7 (2013-09-25) bugfix: subpixel glyph bug fixed in 0.5 had come back
// 0.6c (2012-07-24) improve documentation
// 0.6b (2012-07-20) fix a few more warnings
// 0.6 (2012-07-17) fix warnings; added stbtt_ScaleForMappingEmToPixels,
// stbtt_GetFontBoundingBox, stbtt_IsGlyphEmpty
// 0.5 (2011-12-09) bugfixes:
// subpixel glyph renderer computed wrong bounding box
// first vertex of shape can be off-curve (FreeSans)
// 0.4b (2011-12-03) fixed an error in the font baking example
// 0.4 (2011-12-01) kerning, subpixel rendering (tor)
// bugfixes for:
// codepoint-to-glyph conversion using table fmt=12
// codepoint-to-glyph conversion using table fmt=4
// stbtt_GetBakedQuad with non-square texture (Zer)
// updated Hello World! sample to use kerning and subpixel
// fixed some warnings
// 0.3 (2009-06-24) cmap fmt=12, compound shapes (MM)
// userdata, malloc-from-userdata, non-zero fill (stb)
// 0.2 (2009-03-11) Fix unsigned/signed char warnings
// 0.1 (2009-03-09) First public release
// //
// LICENSE // LICENSE
// //
// This software is in the public domain. Where that dedication is not // This software is in the public domain. Where that dedication is not
// recognized, you are granted a perpetual, irrevokable license to copy // recognized, you are granted a perpetual, irrevocable license to copy,
// and modify this file as you see fit. // distribute, and modify this file as you see fit.
// //
// USAGE // USAGE
// //
@ -538,7 +515,7 @@ STBTT_DEF int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, i
// Future calls using this context will pack characters into the bitmap passed // Future calls using this context will pack characters into the bitmap passed
// in here: a 1-channel bitmap that is weight x height. stride_in_bytes is // in here: a 1-channel bitmap that is weight x height. stride_in_bytes is
// the distance from one row to the next (or 0 to mean they are packed tightly // the distance from one row to the next (or 0 to mean they are packed tightly
// together). "padding" is // the amount of padding to leave between each // together). "padding" is the amount of padding to leave between each
// character (normally you want '1' for bitmaps you'll use as textures with // character (normally you want '1' for bitmaps you'll use as textures with
// bilinear filtering). // bilinear filtering).
// //
@ -567,34 +544,34 @@ STBTT_DEF int stbtt_PackFontRange(stbtt_pack_context *spc, unsigned char *fontd
typedef struct typedef struct
{ {
float font_size; float font_size;
int first_unicode_char_in_range; int first_unicode_codepoint_in_range; // if non-zero, then the chars are continuous, and this is the first codepoint
int num_chars_in_range; int *array_of_unicode_codepoints; // if non-zero, then this is an array of unicode codepoints
int num_chars;
stbtt_packedchar *chardata_for_range; // output stbtt_packedchar *chardata_for_range; // output
unsigned char h_oversample, v_oversample; // don't set these, they're used internally
} stbtt_pack_range; } 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 int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges);
// Creates character bitmaps from multiple ranges of characters stored in // Creates character bitmaps from multiple ranges of characters stored in
// ranges. This will usually create a better-packed bitmap than multiple // ranges. This will usually create a better-packed bitmap than multiple
// calls to stbtt_PackFontRange. // calls to stbtt_PackFontRange. Note that you can call this multiple
// times within a single PackBegin/PackEnd.
STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects);
STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects);
// Those functions are called by stbtt_PackFontRanges(). If you want to
// pack multiple fonts or custom data into a same texture, you may copy
// the contents of stbtt_PackFontRanges() and create a custom version
// using those functions.
STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample); STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample);
// Oversampling a font increases the quality by allowing higher-quality subpixel // Oversampling a font increases the quality by allowing higher-quality subpixel
// positioning, and is especially valuable at smaller text sizes. // positioning, and is especially valuable at smaller text sizes.
// //
// This function sets the amount of oversampling for all following calls to // This function sets the amount of oversampling for all following calls to
// stbtt_PackFontRange(s). The default (no oversampling) is achieved by // stbtt_PackFontRange(s) or stbtt_PackFontRangesGatherRects for a given
// h_oversample=1, v_oversample=1. The total number of pixels required is // pack context. The default (no oversampling) is achieved by h_oversample=1
// and v_oversample=1. The total number of pixels required is
// h_oversample*v_oversample larger than the default; for example, 2x2 // h_oversample*v_oversample larger than the default; for example, 2x2
// oversampling requires 4x the storage of 1x1. For best results, render // oversampling requires 4x the storage of 1x1. For best results, render
// oversampled textures with bilinear filtering. Look at the readme in // oversampled textures with bilinear filtering. Look at the readme in
// stb/tests/oversample for information about oversampled fonts // stb/tests/oversample for information about oversampled fonts
//
// To use with PackFontRangesGather etc., you must set it before calls
// call to PackFontRangesGatherRects.
STBTT_DEF void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph, // same data as above STBTT_DEF void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph, // same data as above
int char_index, // character to display int char_index, // character to display
@ -602,6 +579,19 @@ STBTT_DEF void stbtt_GetPackedQuad(stbtt_packedchar *chardata, int pw, int ph,
stbtt_aligned_quad *q, // output: quad to draw stbtt_aligned_quad *q, // output: quad to draw
int align_to_integer); 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);
// Calling these functions in sequence is roughly equivalent to calling
// stbtt_PackFontRanges(). If you more control over the packing of multiple
// fonts, or if you want to pack custom data into a font texture, take a look
// at the source to of stbtt_PackFontRanges() and create a custom version
// using these functions, e.g. call GatherRects multiple times,
// building up a single array of rects, then call PackRects once,
// then call RenderIntoRects repeatedly. This may result in a
// better packing than calling PackFontRanges multiple times
// (or it may not).
// this is an opaque structure that you shouldn't mess with which holds // this is an opaque structure that you shouldn't mess with which holds
// all the context needed from PackBegin to PackEnd. // all the context needed from PackBegin to PackEnd.
struct stbtt_pack_context { struct stbtt_pack_context {
@ -927,6 +917,10 @@ enum { // languageID for STBTT_PLATFORM_ID_MAC
#define STBTT_MAX_OVERSAMPLE 8 #define STBTT_MAX_OVERSAMPLE 8
#endif #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]; typedef int stbtt__test_oversample_pow2[(STBTT_MAX_OVERSAMPLE & (STBTT_MAX_OVERSAMPLE-1)) == 0 ? 1 : -1];
#ifndef STBTT_RASTERIZER_VERSION #ifndef STBTT_RASTERIZER_VERSION
@ -1001,7 +995,7 @@ STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *font_collection,
stbtt_int32 n = ttLONG(font_collection+8); stbtt_int32 n = ttLONG(font_collection+8);
if (index >= n) if (index >= n)
return -1; return -1;
return ttULONG(font_collection+12+index*14); return ttULONG(font_collection+12+index*4);
} }
} }
return -1; return -1;
@ -1854,8 +1848,8 @@ static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e,
static void stbtt__handle_clipped_edge(float *scanline, int x, stbtt__active_edge *e, float x0, float y0, float x1, float y1) 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; if (y0 == y1) return;
assert(y0 < y1); STBTT_assert(y0 < y1);
assert(e->sy <= e->ey); STBTT_assert(e->sy <= e->ey);
if (y0 > e->ey) return; if (y0 > e->ey) return;
if (y1 < e->sy) return; if (y1 < e->sy) return;
if (y0 < e->sy) { if (y0 < e->sy) {
@ -1868,22 +1862,22 @@ static void stbtt__handle_clipped_edge(float *scanline, int x, stbtt__active_edg
} }
if (x0 == x) if (x0 == x)
assert(x1 <= x+1); STBTT_assert(x1 <= x+1);
else if (x0 == x+1) else if (x0 == x+1)
assert(x1 >= x); STBTT_assert(x1 >= x);
else if (x0 <= x) else if (x0 <= x)
assert(x1 <= x); STBTT_assert(x1 <= x);
else if (x0 >= x+1) else if (x0 >= x+1)
assert(x1 >= x+1); STBTT_assert(x1 >= x+1);
else else
assert(x1 >= x && x1 <= x+1); STBTT_assert(x1 >= x && x1 <= x+1);
if (x0 <= x && x1 <= x) if (x0 <= x && x1 <= x)
scanline[x] += e->direction * (y1-y0); scanline[x] += e->direction * (y1-y0);
else if (x0 >= x+1 && x1 >= x+1) else if (x0 >= x+1 && x1 >= x+1)
; ;
else { else {
assert(x0 >= x && x0 <= x+1 && x1 >= x && x1 <= x+1); STBTT_assert(x0 >= x && x0 <= x+1 && x1 >= x && x1 <= x+1);
scanline[x] += e->direction * (y1-y0) * (1-((x0-x)+(x1-x))/2); // coverage = 1 - average x position scanline[x] += e->direction * (y1-y0) * (1-((x0-x)+(x1-x))/2); // coverage = 1 - average x position
} }
} }
@ -1896,7 +1890,7 @@ static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill,
// brute force every pixel // brute force every pixel
// compute intersection points with top & bottom // compute intersection points with top & bottom
assert(e->ey >= y_top); STBTT_assert(e->ey >= y_top);
if (e->fdx == 0) { if (e->fdx == 0) {
float x0 = e->fx; float x0 = e->fx;
@ -1915,7 +1909,7 @@ static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill,
float x_top, x_bottom; float x_top, x_bottom;
float y0,y1; float y0,y1;
float dy = e->fdy; float dy = e->fdy;
assert(e->sy <= y_bottom && e->ey >= y_top); STBTT_assert(e->sy <= y_bottom && e->ey >= y_top);
// compute endpoints of line segment clipped to this scanline (if the // compute endpoints of line segment clipped to this scanline (if the
// line segment starts on this scanline. x0 is the intersection of the // line segment starts on this scanline. x0 is the intersection of the
@ -1943,7 +1937,7 @@ static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill,
// simple case, only spans one pixel // simple case, only spans one pixel
int x = (int) x_top; int x = (int) x_top;
height = y1 - y0; height = y1 - y0;
assert(x >= 0 && x < len); STBTT_assert(x >= 0 && x < len);
scanline[x] += e->direction * (1-((x_top - x) + (x_bottom-x))/2) * height; scanline[x] += e->direction * (1-((x_top - x) + (x_bottom-x))/2) * height;
scanline_fill[x] += e->direction * height; // everything right of this pixel is filled scanline_fill[x] += e->direction * height; // everything right of this pixel is filled
} else { } else {
@ -1980,7 +1974,7 @@ static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill,
} }
y_crossing += dy * (x2 - (x1+1)); y_crossing += dy * (x2 - (x1+1));
assert(fabs(area) <= 1.01f); STBTT_assert(fabs(area) <= 1.01f);
scanline[x2] += area + sign * (1-((x2-x2)+(x_bottom-x2))/2) * (y1-y_crossing); scanline[x2] += area + sign * (1-((x2-x2)+(x_bottom-x2))/2) * (y1-y_crossing);
@ -1998,38 +1992,51 @@ static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill,
// there can be up to two intersections with the pixel. any intersection // there can be up to two intersections with the pixel. any intersection
// with left or right edges can be handled by splitting into two (or three) // with left or right edges can be handled by splitting into two (or three)
// regions. intersections with top & bottom do not necessitate case-wise logic. // regions. intersections with top & bottom do not necessitate case-wise logic.
float y0,y1; //
float y_cur = y_top, x_cur = x0; // the old way of doing this found the intersections with the left & right edges,
// then used some simple logic to produce up to three segments in sorted order
// from top-to-bottom. however, this had a problem: if an x edge was epsilon
// across the x border, then the corresponding y position might not be distinct
// from the other y segment, and it might ignored as an empty segment. to avoid
// that, we need to explicitly produce segments based on x positions.
// rename variables to clear pairs
float y0 = y_top;
float x1 = (float) (x);
float x2 = (float) (x+1);
float x3 = xb;
float y3 = y_bottom;
float y1,y2;
// x = e->x + e->dx * (y-y_top) // x = e->x + e->dx * (y-y_top)
// (y-y_top) = (x - e->x) / e->dx // (y-y_top) = (x - e->x) / e->dx
// y = (x - e->x) / e->dx + y_top // y = (x - e->x) / e->dx + y_top
y0 = (x - x0) / dx + y_top; y1 = (x - x0) / dx + y_top;
y1 = (x+1 - x0) / dx + y_top; y2 = (x+1 - x0) / dx + y_top;
if (y0 < y1) { if (x0 < x1 && x3 > x2) { // three segments descending down-right
if (y0 > y_top && y0 < y_bottom) { stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1);
stbtt__handle_clipped_edge(scanline,x,e, x_cur,y_cur, (float) x,y0); stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x2,y2);
y_cur = y0; stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3);
x_cur = (float) x; } else if (x3 < x1 && x0 > x2) { // three segments descending down-left
} stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2);
if (y1 >= y_cur && y1 < y_bottom) { stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x1,y1);
stbtt__handle_clipped_edge(scanline,x,e, x_cur,y_cur, (float) x+1,y1); stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3);
y_cur = y1; } else if (x0 < x1 && x3 > x1) { // two segments across x, down-right
x_cur = (float) x+1; stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1);
} stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3);
} else { } else if (x3 < x1 && x0 > x1) { // two segments across x, down-left
if (y1 >= y_cur && y1 < y_bottom) { stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1);
stbtt__handle_clipped_edge(scanline,x,e, x_cur,y_cur, (float) x+1,y1); stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3);
y_cur = y1; } else if (x0 < x2 && x3 > x2) { // two segments across x+1, down-right
x_cur = (float) x+1; stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2);
} stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3);
if (y0 > y_top && y0 < y_bottom) { } else if (x3 < x2 && x0 > x2) { // two segments across x+1, down-left
stbtt__handle_clipped_edge(scanline,x,e, x_cur,y_cur, (float) x,y0); stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2);
y_cur = y0; stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3);
x_cur = (float) x; } else { // one segment
} stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x3,y3);
} }
stbtt__handle_clipped_edge(scanline,x,e, x_cur,y_cur, xb,y_bottom);
} }
} }
} }
@ -2040,7 +2047,7 @@ static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill,
// directly AA rasterize edges w/o supersampling // directly AA rasterize edges w/o supersampling
static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata) 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; (void)vsubsample;
stbtt__hheap hh = { 0 }; stbtt__hheap hh = { 0 };
stbtt__active_edge *active = NULL; stbtt__active_edge *active = NULL;
int y,j=0, i; int y,j=0, i;
@ -2082,7 +2089,7 @@ static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e,
// insert all edges that start before the bottom of this scanline // insert all edges that start before the bottom of this scanline
while (e->y0 <= scan_y_bottom) { while (e->y0 <= scan_y_bottom) {
stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y_top, userdata); stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y_top, userdata);
assert(z->ey >= scan_y_top); STBTT_assert(z->ey >= scan_y_top);
// insert at front // insert at front
z->next = active; z->next = active;
active = z; active = z;
@ -2716,6 +2723,13 @@ static void stbtt__h_prefilter(unsigned char *pixels, int w, int h, int stride_i
pixels[i] = (unsigned char) (total / 4); pixels[i] = (unsigned char) (total / 4);
} }
break; 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: default:
for (i=0; i <= safe_w; ++i) { for (i=0; i <= safe_w; ++i) {
total += pixels[i] - buffer[i & STBTT__OVER_MASK]; total += pixels[i] - buffer[i & STBTT__OVER_MASK];
@ -2770,6 +2784,13 @@ static void stbtt__v_prefilter(unsigned char *pixels, int w, int h, int stride_i
pixels[i*stride_in_bytes] = (unsigned char) (total / 4); pixels[i*stride_in_bytes] = (unsigned char) (total / 4);
} }
break; 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: default:
for (i=0; i <= safe_h; ++i) { for (i=0; i <= safe_h; ++i) {
total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK]; total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
@ -2810,9 +2831,12 @@ STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fon
for (i=0; i < num_ranges; ++i) { for (i=0; i < num_ranges; ++i) {
float fh = ranges[i].font_size; float fh = ranges[i].font_size;
float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh); float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh);
for (j=0; j < ranges[i].num_chars_in_range; ++j) { 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 x0,y0,x1,y1;
int glyph = stbtt_FindGlyphIndex(info,ranges[i].first_unicode_char_in_range + j); 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, stbtt_GetGlyphBitmapBoxSubpixel(info,glyph,
scale * spc->h_oversample, scale * spc->h_oversample,
scale * spc->v_oversample, scale * spc->v_oversample,
@ -2830,22 +2854,30 @@ STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, stbtt_fon
// rects array must be big enough to accommodate all characters in the given ranges // rects array must be big enough to accommodate all characters in the given ranges
STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects) STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
{ {
float recip_h = 1.0f / spc->h_oversample;
float recip_v = 1.0f / spc->v_oversample;
float sub_x = stbtt__oversample_shift(spc->h_oversample);
float sub_y = stbtt__oversample_shift(spc->v_oversample);
int i,j,k, return_value = 1; int i,j,k, return_value = 1;
// save current values
int old_h_over = spc->h_oversample;
int old_v_over = spc->v_oversample;
k = 0; k = 0;
for (i=0; i < num_ranges; ++i) { for (i=0; i < num_ranges; ++i) {
float fh = ranges[i].font_size; float fh = ranges[i].font_size;
float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh); float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh);
for (j=0; j < ranges[i].num_chars_in_range; ++j) { 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]; stbrp_rect *r = &rects[k];
if (r->was_packed) { if (r->was_packed) {
stbtt_packedchar *bc = &ranges[i].chardata_for_range[j]; stbtt_packedchar *bc = &ranges[i].chardata_for_range[j];
int advance, lsb, x0,y0,x1,y1; int advance, lsb, x0,y0,x1,y1;
int glyph = stbtt_FindGlyphIndex(info, ranges[i].first_unicode_char_in_range + j); 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; stbrp_coord pad = (stbrp_coord) spc->padding;
// pad on left and top // pad on left and top
@ -2895,19 +2927,28 @@ STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, stbtt
} }
} }
// restore original values
spc->h_oversample = old_h_over;
spc->v_oversample = old_v_over;
return return_value; 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_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges)
{ {
stbtt_fontinfo info; stbtt_fontinfo info;
int i,j,n, return_value = 1; int i,j,n, return_value = 1;
stbrp_context *context = (stbrp_context *) spc->pack_info; //stbrp_context *context = (stbrp_context *) spc->pack_info;
stbrp_rect *rects; stbrp_rect *rects;
// flag all characters as NOT packed // flag all characters as NOT packed
for (i=0; i < num_ranges; ++i) for (i=0; i < num_ranges; ++i)
for (j=0; j < ranges[i].num_chars_in_range; ++j) for (j=0; j < ranges[i].num_chars; ++j)
ranges[i].chardata_for_range[j].x0 = ranges[i].chardata_for_range[j].x0 =
ranges[i].chardata_for_range[j].y0 = ranges[i].chardata_for_range[j].y0 =
ranges[i].chardata_for_range[j].x1 = ranges[i].chardata_for_range[j].x1 =
@ -2915,7 +2956,7 @@ STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontd
n = 0; n = 0;
for (i=0; i < num_ranges; ++i) for (i=0; i < num_ranges; ++i)
n += ranges[i].num_chars_in_range; n += ranges[i].num_chars;
rects = (stbrp_rect *) STBTT_malloc(sizeof(*rects) * n, spc->user_allocator_context); rects = (stbrp_rect *) STBTT_malloc(sizeof(*rects) * n, spc->user_allocator_context);
if (rects == NULL) if (rects == NULL)
@ -2925,7 +2966,7 @@ STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontd
n = stbtt_PackFontRangesGatherRects(spc, &info, ranges, num_ranges, rects); n = stbtt_PackFontRangesGatherRects(spc, &info, ranges, num_ranges, rects);
stbrp_pack_rects(context, rects, n); stbtt_PackFontRangesPackRects(spc, rects, n);
return_value = stbtt_PackFontRangesRenderIntoRects(spc, &info, ranges, num_ranges, rects); return_value = stbtt_PackFontRangesRenderIntoRects(spc, &info, ranges, num_ranges, rects);
@ -2934,11 +2975,12 @@ STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontd
} }
STBTT_DEF int stbtt_PackFontRange(stbtt_pack_context *spc, unsigned char *fontdata, int font_index, float font_size, 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) int first_unicode_codepoint_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range)
{ {
stbtt_pack_range range; stbtt_pack_range range;
range.first_unicode_char_in_range = first_unicode_char_in_range; range.first_unicode_codepoint_in_range = first_unicode_codepoint_in_range;
range.num_chars_in_range = num_chars_in_range; range.array_of_unicode_codepoints = NULL;
range.num_chars = num_chars_in_range;
range.chardata_for_range = chardata_for_range; range.chardata_for_range = chardata_for_range;
range.font_size = font_size; range.font_size = font_size;
return stbtt_PackFontRanges(spc, fontdata, font_index, &range, 1); return stbtt_PackFontRanges(spc, fontdata, font_index, &range, 1);
@ -3133,3 +3175,47 @@ STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *font_collection, const
} }
#endif // STB_TRUETYPE_IMPLEMENTATION #endif // STB_TRUETYPE_IMPLEMENTATION
// FULL VERSION HISTORY
//
// 1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints;
// allow PackFontRanges to pack and render in separate phases;
// fix stbtt_GetFontOFfsetForIndex (never worked for non-0 input?);
// fixed an assert() bug in the new rasterizer
// replace assert() with STBTT_assert() in new rasterizer
// 1.06 (2015-07-14) performance improvements (~35% faster on x86 and x64 on test machine)
// also more precise AA rasterizer, except if shapes overlap
// remove need for STBTT_sort
// 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
// 1.00 (2014-12-06) add new PackBegin etc. API, w/ support for oversampling
// 0.99 (2014-09-18) fix multiple bugs with subpixel rendering (ryg)
// 0.9 (2014-08-07) support certain mac/iOS fonts without an MS platformID
// 0.8b (2014-07-07) fix a warning
// 0.8 (2014-05-25) fix a few more warnings
// 0.7 (2013-09-25) bugfix: subpixel glyph bug fixed in 0.5 had come back
// 0.6c (2012-07-24) improve documentation
// 0.6b (2012-07-20) fix a few more warnings
// 0.6 (2012-07-17) fix warnings; added stbtt_ScaleForMappingEmToPixels,
// stbtt_GetFontBoundingBox, stbtt_IsGlyphEmpty
// 0.5 (2011-12-09) bugfixes:
// subpixel glyph renderer computed wrong bounding box
// first vertex of shape can be off-curve (FreeSans)
// 0.4b (2011-12-03) fixed an error in the font baking example
// 0.4 (2011-12-01) kerning, subpixel rendering (tor)
// bugfixes for:
// codepoint-to-glyph conversion using table fmt=12
// codepoint-to-glyph conversion using table fmt=4
// stbtt_GetBakedQuad with non-square texture (Zer)
// updated Hello World! sample to use kerning and subpixel
// fixed some warnings
// 0.3 (2009-06-24) cmap fmt=12, compound shapes (MM)
// userdata, malloc-from-userdata, non-zero fill (stb)
// 0.2 (2009-03-11) Fix unsigned/signed char warnings
// 0.1 (2009-03-09) First public release
//