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Fixed EFB cache index computations in OpenGL renderer.

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The previous computation was very likely to go out of array bounds,
which could result in crashes on EFB access.

Also, the cache size was rounded down instead of up. This is a problem
since EFB_HEIGHT (528) is not a multiple of EFB_CACHE_RECT_SIZE (64).
This commit is contained in:
Maarten ter Huurne 2011-12-01 02:40:58 +01:00
parent cda94290f5
commit 98981cc724
1 changed files with 4 additions and 3 deletions
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7
Source/Plugins/Plugin_VideoOGL/Src/Render.cpp
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@ -125,8 +125,8 @@ static std::thread scrshotThread;
// EFB cache related
const u32 EFB_CACHE_RECT_SIZE = 64; // Cache 64x64 blocks.
const u32 EFB_CACHE_WIDTH = EFB_WIDTH / EFB_CACHE_RECT_SIZE;
const u32 EFB_CACHE_HEIGHT = EFB_HEIGHT / EFB_CACHE_RECT_SIZE;
const u32 EFB_CACHE_WIDTH = (EFB_WIDTH + EFB_CACHE_RECT_SIZE - 1) / EFB_CACHE_RECT_SIZE; // round up
const u32 EFB_CACHE_HEIGHT = (EFB_HEIGHT + EFB_CACHE_RECT_SIZE - 1) / EFB_CACHE_RECT_SIZE;
static bool s_efbCacheValid[2][EFB_CACHE_WIDTH * EFB_CACHE_HEIGHT];
static std::vector<u32> s_efbCache[2][EFB_CACHE_WIDTH * EFB_CACHE_HEIGHT]; // 2 for PEEK_Z and PEEK_COLOR
@ -698,7 +698,8 @@ u32 Renderer::AccessEFB(EFBAccessType type, u32 x, u32 y, u32 poke_data)
if (!g_ActiveConfig.bEFBAccessEnable)
return 0;
u32 cacheRectIdx = ((x / EFB_CACHE_RECT_SIZE) << 16) | (y / EFB_CACHE_RECT_SIZE);
u32 cacheRectIdx = (y / EFB_CACHE_RECT_SIZE) * EFB_CACHE_WIDTH
+ (x / EFB_CACHE_RECT_SIZE);
// Get the rectangular target region containing the EFB pixel
EFBRectangle efbPixelRc;