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freetype: better way to determine max_width/height, fixes buffer overflow with alternate OSD fonts

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This commit is contained in:
Brad Parker 2017-07-22 22:21:26 -04:00
parent b9036e26a7
commit 12ae59a197
1 changed files with 2 additions and 3 deletions
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5
gfx/drivers_font_renderer/freetype.c
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@ -169,9 +169,8 @@ static bool font_renderer_create_atlas(ft_font_renderer_t *handle, float font_si
unsigned i, x, y;
freetype_atlas_slot_t* slot = NULL;
/* TODO: find a better way to determine max_width/max_height */
unsigned max_width = font_size + 2;
unsigned max_height = font_size + 2;
unsigned max_width = round((handle->face->bbox.xMax - handle->face->bbox.xMin) * font_size / handle->face->units_per_EM);
unsigned max_height = round((handle->face->bbox.yMax - handle->face->bbox.yMin) * font_size / handle->face->units_per_EM);
unsigned atlas_width = max_width * FT_ATLAS_COLS;