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stb_truetype: updated 1.08 > 1.10 + minor unused variable warning fix
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@ -1,4 +1,4 @@
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// stb_truetype.h - v1.08 - public domain
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// stb_truetype.h - v1.10 - public domain
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// authored from 2009-2015 by Sean Barrett / RAD Game Tools
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//
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// This library processes TrueType files:
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@ -21,6 +21,10 @@
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// Mikko Mononen: compound shape support, more cmap formats
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// Tor Andersson: kerning, subpixel rendering
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//
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// Misc other:
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// Ryan Gordon
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// Simon Glass
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//
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// Bug/warning reports/fixes:
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// "Zer" on mollyrocket (with fix)
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// Cass Everitt
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@ -42,12 +46,13 @@
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// Sergey Popov
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// Giumo X. Clanjor
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// Higor Euripedes
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//
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// Misc other:
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// Ryan Gordon
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// Thomas Fields
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// Derek Vinyard
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//
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// VERSION HISTORY
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//
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// 1.10 (2016-04-02) user-defined fabs(); rare memory leak; remove duplicate typedef
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// 1.09 (2016-01-16) warning fix; avoid crash on outofmem; use allocation userdata properly
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// 1.08 (2015-09-13) document stbtt_Rasterize(); fixes for vertical & horizontal edges
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// 1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints;
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// variant PackFontRanges to pack and render in separate phases;
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@ -65,9 +70,9 @@
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//
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// LICENSE
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//
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// This software is in the public domain. Where that dedication is not
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// recognized, you are granted a perpetual, irrevocable license to copy,
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// distribute, and modify this file as you see fit.
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// This software is dual-licensed to the public domain and under the following
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// license: you are granted a perpetual, irrevocable license to copy, modify,
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// publish, and distribute this file as you see fit.
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//
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// USAGE
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//
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@ -403,6 +408,11 @@ int main(int arg, char **argv)
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#define STBTT_sqrt(x) sqrt(x)
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#endif
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#ifndef STBTT_fabs
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#include <math.h>
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#define STBTT_fabs(x) fabs(x)
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#endif
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// #define your own functions "STBTT_malloc" / "STBTT_free" to avoid malloc.h
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#ifndef STBTT_malloc
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#include <stdlib.h>
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@ -626,7 +636,7 @@ STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index);
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// The following structure is defined publically so you can declare one on
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// the stack or as a global or etc, but you should treat it as opaque.
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typedef struct stbtt_fontinfo
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struct stbtt_fontinfo
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{
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void * userdata;
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unsigned char * data; // pointer to .ttf file
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@ -637,7 +647,7 @@ typedef struct stbtt_fontinfo
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int loca,head,glyf,hhea,hmtx,kern; // table locations as offset from start of .ttf
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int index_map; // a cmap mapping for our chosen character encoding
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int indexToLocFormat; // format needed to map from glyph index to glyph
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} stbtt_fontinfo;
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};
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STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset);
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// Given an offset into the file that defines a font, this function builds
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@ -1556,7 +1566,7 @@ STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v)
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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)
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{
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int x0,y0,x1,y1;
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int x0=0,y0=0,x1,y1; // =0 suppresses compiler warning
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if (!stbtt_GetGlyphBox(font, glyph, &x0,&y0,&x1,&y1)) {
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// e.g. space character
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if (ix0) *ix0 = 0;
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@ -1672,6 +1682,7 @@ static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, i
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{
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stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata);
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float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
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STBTT_assert(z != NULL);
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if (!z) return z;
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// round dx down to avoid overshooting
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@ -1693,6 +1704,7 @@ static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, i
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{
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stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata);
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float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
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STBTT_assert(z != NULL);
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//STBTT_assert(e->y0 <= start_point);
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if (!z) return z;
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z->fdx = dxdy;
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@ -1817,21 +1829,23 @@ static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e,
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while (e->y0 <= scan_y) {
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if (e->y1 > scan_y) {
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stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y, userdata);
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// find insertion point
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if (active == NULL)
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active = z;
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else if (z->x < active->x) {
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// insert at front
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z->next = active;
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active = z;
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} else {
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// find thing to insert AFTER
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stbtt__active_edge *p = active;
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while (p->next && p->next->x < z->x)
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p = p->next;
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// at this point, p->next->x is NOT < z->x
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z->next = p->next;
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p->next = z;
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if (z != NULL) {
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// find insertion point
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if (active == NULL)
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active = z;
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else if (z->x < active->x) {
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// insert at front
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z->next = active;
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active = z;
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} else {
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// find thing to insert AFTER
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stbtt__active_edge *p = active;
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while (p->next && p->next->x < z->x)
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p = p->next;
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// at this point, p->next->x is NOT < z->x
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z->next = p->next;
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p->next = z;
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}
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}
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}
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++e;
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@ -1986,7 +2000,7 @@ static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill,
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}
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y_crossing += dy * (x2 - (x1+1));
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STBTT_assert(fabs(area) <= 1.01f);
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STBTT_assert(STBTT_fabs(area) <= 1.01f);
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scanline[x2] += area + sign * (1-((x2-x2)+(x_bottom-x2))/2) * (sy1-y_crossing);
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@ -2102,10 +2116,12 @@ static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e,
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while (e->y0 <= scan_y_bottom) {
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if (e->y0 != e->y1) {
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stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y_top, userdata);
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STBTT_assert(z->ey >= scan_y_top);
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// insert at front
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z->next = active;
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active = z;
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if (z != NULL) {
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STBTT_assert(z->ey >= scan_y_top);
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// insert at front
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z->next = active;
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active = z;
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}
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}
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++e;
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}
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@ -2121,7 +2137,7 @@ static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e,
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int m;
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sum += scanline2[i];
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k = scanline[i] + sum;
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k = (float) fabs(k)*255 + 0.5f;
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k = (float) STBTT_fabs(k)*255 + 0.5f;
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m = (int) k;
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if (m > 255) m = 255;
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result->pixels[j*result->stride + i] = (unsigned char) m;
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@ -2422,7 +2438,10 @@ STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info
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if (scale_x == 0) scale_x = scale_y;
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if (scale_y == 0) {
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if (scale_x == 0) return NULL;
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if (scale_x == 0) {
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STBTT_free(vertices, info->userdata);
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return NULL;
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}
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scale_y = scale_x;
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}
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@ -2514,6 +2533,7 @@ STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset, // fo
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float scale;
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int x,y,bottom_y, i;
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stbtt_fontinfo f;
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f.userdata = NULL;
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if (!stbtt_InitFont(&f, data, offset))
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return -1;
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STBTT_memset(pixels, 0, pw*ph); // background of 0 around pixels
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@ -2707,6 +2727,7 @@ static void stbtt__h_prefilter(unsigned char *pixels, int w, int h, int stride_i
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unsigned char buffer[STBTT_MAX_OVERSAMPLE];
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int safe_w = w - kernel_width;
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int j;
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STBTT_memset(buffer, 0, STBTT_MAX_OVERSAMPLE); // suppress bogus warning from VS2013 -analyze
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for (j=0; j < h; ++j) {
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int i;
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unsigned int total;
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@ -2768,6 +2789,7 @@ static void stbtt__v_prefilter(unsigned char *pixels, int w, int h, int stride_i
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unsigned char buffer[STBTT_MAX_OVERSAMPLE];
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int safe_h = h - kernel_width;
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int j;
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STBTT_memset(buffer, 0, STBTT_MAX_OVERSAMPLE); // suppress bogus warning from VS2013 -analyze
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for (j=0; j < w; ++j) {
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int i;
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unsigned int total;
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@ -2976,6 +2998,7 @@ STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontd
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if (rects == NULL)
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return 0;
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info.userdata = spc->user_allocator_context;
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stbtt_InitFont(&info, fontdata, stbtt_GetFontOffsetForIndex(fontdata,font_index));
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n = stbtt_PackFontRangesGatherRects(spc, &info, ranges, num_ranges, rects);
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@ -3193,6 +3216,10 @@ STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *font_collection, const
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// FULL VERSION HISTORY
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//
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// 1.10 (2016-04-02) allow user-defined fabs() replacement
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// fix memory leak if fontsize=0.0
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// fix warning from duplicate typedef
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// 1.09 (2016-01-16) warning fix; avoid crash on outofmem; use alloc userdata for PackFontRanges
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// 1.08 (2015-09-13) document stbtt_Rasterize(); fixes for vertical & horizontal edges
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// 1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints;
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// allow PackFontRanges to pack and render in separate phases;
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