From 9945eecaf4c9e9523039d61d288b51d86e9977e0 Mon Sep 17 00:00:00 2001 From: ocornut Date: Sat, 2 Apr 2016 20:12:20 +0200 Subject: [PATCH] stb_truetype: updated 1.08 > 1.10 + minor unused variable warning fix --- stb_truetype.h | 91 ++++++++++++++++++++++++++++++++------------------ 1 file changed, 59 insertions(+), 32 deletions(-) diff --git a/stb_truetype.h b/stb_truetype.h index 1f93135b0..e6dae9751 100644 --- a/stb_truetype.h +++ b/stb_truetype.h @@ -1,4 +1,4 @@ -// stb_truetype.h - v1.08 - public domain +// stb_truetype.h - v1.10 - public domain // authored from 2009-2015 by Sean Barrett / RAD Game Tools // // This library processes TrueType files: @@ -21,6 +21,10 @@ // Mikko Mononen: compound shape support, more cmap formats // Tor Andersson: kerning, subpixel rendering // +// Misc other: +// Ryan Gordon +// Simon Glass +// // Bug/warning reports/fixes: // "Zer" on mollyrocket (with fix) // Cass Everitt @@ -42,12 +46,13 @@ // Sergey Popov // Giumo X. Clanjor // Higor Euripedes -// -// Misc other: -// Ryan Gordon +// Thomas Fields +// Derek Vinyard // // VERSION HISTORY // +// 1.10 (2016-04-02) user-defined fabs(); rare memory leak; remove duplicate typedef +// 1.09 (2016-01-16) warning fix; avoid crash on outofmem; use allocation userdata properly // 1.08 (2015-09-13) document stbtt_Rasterize(); fixes for vertical & horizontal edges // 1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints; // variant PackFontRanges to pack and render in separate phases; @@ -65,9 +70,9 @@ // // LICENSE // -// This software is in the public domain. Where that dedication is not -// recognized, you are granted a perpetual, irrevocable license to copy, -// distribute, and modify this file as you see fit. +// This software is dual-licensed to the public domain and under the following +// license: you are granted a perpetual, irrevocable license to copy, modify, +// publish, and distribute this file as you see fit. // // USAGE // @@ -403,6 +408,11 @@ int main(int arg, char **argv) #define STBTT_sqrt(x) sqrt(x) #endif + #ifndef STBTT_fabs + #include + #define STBTT_fabs(x) fabs(x) + #endif + // #define your own functions "STBTT_malloc" / "STBTT_free" to avoid malloc.h #ifndef STBTT_malloc #include @@ -626,7 +636,7 @@ STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index); // The following structure is defined publically so you can declare one on // the stack or as a global or etc, but you should treat it as opaque. -typedef struct stbtt_fontinfo +struct stbtt_fontinfo { void * userdata; unsigned char * data; // pointer to .ttf file @@ -637,7 +647,7 @@ typedef struct stbtt_fontinfo int loca,head,glyf,hhea,hmtx,kern; // 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 -} stbtt_fontinfo; +}; STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset); // Given an offset into the file that defines a font, this function builds @@ -1556,7 +1566,7 @@ STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v) 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; + int x0=0,y0=0,x1,y1; // =0 suppresses compiler warning if (!stbtt_GetGlyphBox(font, glyph, &x0,&y0,&x1,&y1)) { // e.g. space character if (ix0) *ix0 = 0; @@ -1672,6 +1682,7 @@ static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, i { stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata); float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0); + STBTT_assert(z != NULL); if (!z) return z; // round dx down to avoid overshooting @@ -1693,6 +1704,7 @@ static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, i { stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata); float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0); + STBTT_assert(z != NULL); //STBTT_assert(e->y0 <= start_point); if (!z) return z; z->fdx = dxdy; @@ -1817,21 +1829,23 @@ static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, while (e->y0 <= scan_y) { if (e->y1 > scan_y) { stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y, userdata); - // find insertion point - if (active == NULL) - active = z; - else if (z->x < active->x) { - // insert at front - z->next = active; - active = z; - } else { - // find thing to insert AFTER - stbtt__active_edge *p = active; - while (p->next && p->next->x < z->x) - p = p->next; - // at this point, p->next->x is NOT < z->x - z->next = p->next; - p->next = z; + if (z != NULL) { + // find insertion point + if (active == NULL) + active = z; + else if (z->x < active->x) { + // insert at front + z->next = active; + active = z; + } else { + // find thing to insert AFTER + stbtt__active_edge *p = active; + while (p->next && p->next->x < z->x) + p = p->next; + // at this point, p->next->x is NOT < z->x + z->next = p->next; + p->next = z; + } } } ++e; @@ -1986,7 +2000,7 @@ static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill, } y_crossing += dy * (x2 - (x1+1)); - STBTT_assert(fabs(area) <= 1.01f); + STBTT_assert(STBTT_fabs(area) <= 1.01f); scanline[x2] += area + sign * (1-((x2-x2)+(x_bottom-x2))/2) * (sy1-y_crossing); @@ -2102,10 +2116,12 @@ static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, while (e->y0 <= scan_y_bottom) { if (e->y0 != e->y1) { stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y_top, userdata); - STBTT_assert(z->ey >= scan_y_top); - // insert at front - z->next = active; - active = z; + if (z != NULL) { + STBTT_assert(z->ey >= scan_y_top); + // insert at front + z->next = active; + active = z; + } } ++e; } @@ -2121,7 +2137,7 @@ static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int m; sum += scanline2[i]; k = scanline[i] + sum; - k = (float) fabs(k)*255 + 0.5f; + k = (float) STBTT_fabs(k)*255 + 0.5f; m = (int) k; if (m > 255) m = 255; result->pixels[j*result->stride + i] = (unsigned char) m; @@ -2422,7 +2438,10 @@ STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info if (scale_x == 0) scale_x = scale_y; if (scale_y == 0) { - if (scale_x == 0) return NULL; + if (scale_x == 0) { + STBTT_free(vertices, info->userdata); + return NULL; + } scale_y = scale_x; } @@ -2514,6 +2533,7 @@ STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset, // fo float scale; int x,y,bottom_y, i; stbtt_fontinfo f; + f.userdata = NULL; if (!stbtt_InitFont(&f, data, offset)) return -1; STBTT_memset(pixels, 0, pw*ph); // background of 0 around pixels @@ -2707,6 +2727,7 @@ static void stbtt__h_prefilter(unsigned char *pixels, int w, int h, int stride_i unsigned char buffer[STBTT_MAX_OVERSAMPLE]; int safe_w = w - kernel_width; int j; + STBTT_memset(buffer, 0, STBTT_MAX_OVERSAMPLE); // suppress bogus warning from VS2013 -analyze for (j=0; j < h; ++j) { int i; unsigned int total; @@ -2768,6 +2789,7 @@ static void stbtt__v_prefilter(unsigned char *pixels, int w, int h, int stride_i unsigned char buffer[STBTT_MAX_OVERSAMPLE]; int safe_h = h - kernel_width; int j; + STBTT_memset(buffer, 0, STBTT_MAX_OVERSAMPLE); // suppress bogus warning from VS2013 -analyze for (j=0; j < w; ++j) { int i; unsigned int total; @@ -2976,6 +2998,7 @@ STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, unsigned char *fontd if (rects == NULL) return 0; + info.userdata = spc->user_allocator_context; stbtt_InitFont(&info, fontdata, stbtt_GetFontOffsetForIndex(fontdata,font_index)); n = stbtt_PackFontRangesGatherRects(spc, &info, ranges, num_ranges, rects); @@ -3193,6 +3216,10 @@ STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *font_collection, const // FULL VERSION HISTORY // +// 1.10 (2016-04-02) allow user-defined fabs() replacement +// fix memory leak if fontsize=0.0 +// fix warning from duplicate typedef +// 1.09 (2016-01-16) warning fix; avoid crash on outofmem; use alloc userdata for PackFontRanges // 1.08 (2015-09-13) document stbtt_Rasterize(); fixes for vertical & horizontal edges // 1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints; // allow PackFontRanges to pack and render in separate phases;