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(svn r18391) -Fix (r0): (Invalid) GRFs could trigger invalid reads.

This commit is contained in:
frosch 2009-12-03 15:27:33 +00:00
parent 3addf58f30
commit 169141433a
2 changed files with 11 additions and 3 deletions
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2
src/gfx.cpp
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@ -70,7 +70,7 @@ static ReusableBuffer<uint8> _cursor_backup;
*/
static Rect _invalid_rect;
static const byte *_colour_remap_ptr;
static byte _string_colourremap[3];
static byte _string_colourremap[3]; ///< Recoloursprite for stringdrawing. The grf loader ensures, that ST_FONT sprites only use colours 0 to 2.
enum {
DIRTY_BLOCK_HEIGHT = 8,

12
src/spriteloader/grf.cpp
View File

@ -127,7 +127,11 @@ bool SpriteLoaderGrf::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot,
}
for (int x = 0; x < length; x++) {
data->m = ((sprite_type == ST_NORMAL && _palette_remap_grf[file_slot]) ? _palette_remap[*dest] : *dest);
switch (sprite_type) {
case ST_NORMAL: data->m = _palette_remap_grf[file_slot] ? _palette_remap[*dest] : *dest; break;
case ST_FONT: data->m = min(*dest, 2u); break;
default: data->m = *dest; break;
}
dest++;
data++;
}
@ -148,7 +152,11 @@ bool SpriteLoaderGrf::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot,
dest = dest_orig;
for (int i = 0; i < sprite->width * sprite->height; i++) {
sprite->data[i].m = ((sprite_type == ST_NORMAL && _palette_remap_grf[file_slot]) ? _palette_remap[dest[i]] : dest[i]);
switch (sprite_type) {
case ST_NORMAL: sprite->data[i].m = _palette_remap_grf[file_slot] ? _palette_remap[dest[i]] : dest[i]; break;
case ST_FONT: sprite->data[i].m = min(dest[i], 2u); break;
default: sprite->data[i].m = dest[i]; break;
}
}
}