static void *font_renderer_stb_init(const char *font_path, float font_size) { int ascent, descent, line_gap; stbtt_fontinfo info; uint8_t *font_data = NULL; stb_font_renderer_t *self = (stb_font_renderer_t*) calloc(1, sizeof(*self)); /* See https://github.com/nothings/stb/blob/master/stb_truetype.h#L539 */ font_size = STBTT_POINT_SIZE(font_size); if (!self) goto error; if (!filestream_read_file(font_path, (void**)&font_data, NULL)) goto error; if (!font_renderer_stb_create_atlas(self, font_data, font_size, 512, 512)) goto error; if (!stbtt_InitFont(&info, font_data, stbtt_GetFontOffsetForIndex(font_data, 0))) goto error; stbtt_GetFontVMetrics(&info, &ascent, &descent, &line_gap); self->line_height = ascent - descent; if (font_size < 0) self->line_height *= stbtt_ScaleForMappingEmToPixels(&info, -font_size); else self->line_height *= stbtt_ScaleForPixelHeight(&info, font_size); free(font_data); return self; error: if (font_data) free(font_data); if (self) font_renderer_stb_free(self); return NULL; }
static void *font_renderer_stb_init(const char *font_path, float font_size) { uint8_t *font_data = NULL; int ascent, descent, line_gap; stbtt_fontinfo info; stb_font_renderer_t *self = (stb_font_renderer_t*) calloc(1, sizeof(*self)); /* prevent warnings */ (void)rect_width_compare; if (!self) goto error; if (!read_file(font_path, (void**)&font_data, NULL)) goto error; if (!font_renderer_stb_create_atlas(self, font_data, font_size)) goto error; if (!stbtt_InitFont(&info, font_data, stbtt_GetFontOffsetForIndex(font_data, 0))) goto error; stbtt_GetFontVMetrics(&info, &ascent, &descent, &line_gap); self->line_height = ascent - descent;// + line_gap; if (font_size < 0) self->line_height *= stbtt_ScaleForMappingEmToPixels(&info, -font_size); else self->line_height *= stbtt_ScaleForPixelHeight(&info, font_size); free(font_data); return self; error: if (font_data) free(font_data); font_renderer_stb_free(self); return NULL; }