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| author | frosch <frosch@openttd.org> | 2011-09-03 10:52:43 +0000 |
|---|---|---|
| committer | frosch <frosch@openttd.org> | 2011-09-03 10:52:43 +0000 |
| commit | b910ae9886be0bdd1289ccff19899713865e6466 (patch) | |
| tree | 1788f77b8821a780590ce117d3bfd80ae8d78157 | |
| parent | 008b5b6d270f9ff4731fd6aa5af936e13677f265 (diff) | |
| download | openttd-b910ae9886be0bdd1289ccff19899713865e6466.tar.xz | |
(svn r22878) -Fix (r22873-ish): Check range before casting to uint16.
| -rw-r--r-- | src/spriteloader/png.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/spriteloader/png.cpp b/src/spriteloader/png.cpp index 27ff3cc9b..693623ead 100644 --- a/src/spriteloader/png.cpp +++ b/src/spriteloader/png.cpp @@ -106,13 +106,15 @@ static bool LoadPNG(SpriteLoader::Sprite *sprite, const char *filename, uint32 i if (strcmp("y_offs", text_ptr[i].key) == 0) sprite->y_offs = strtol(text_ptr[i].text, NULL, 0); } - sprite->height = png_get_image_height(png_ptr, info_ptr); - sprite->width = png_get_image_width(png_ptr, info_ptr); + uint height = png_get_image_height(png_ptr, info_ptr); + uint width = png_get_image_width(png_ptr, info_ptr); /* Check if sprite dimensions aren't larger than what is allowed in GRF-files. */ - if (sprite->height > UINT8_MAX || sprite->width > UINT16_MAX) { + if (height > UINT8_MAX || width > UINT16_MAX) { png_destroy_read_struct(&png_ptr, &info_ptr, &end_info); return false; } + sprite->height = height; + sprite->width = width; sprite->AllocateData(sprite->width * sprite->height); } else if (sprite->height != png_get_image_height(png_ptr, info_ptr) || sprite->width != png_get_image_width(png_ptr, info_ptr)) { /* Make sure the mask image isn't larger than the sprite image. */ |