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GBAGPUView: Don't draw a sprite if its size + tile index combined make it go past the end of vram

This commit is contained in:
nattthebear 2016-12-09 22:09:58 -05:00
parent a898599e69
commit df4b38990f
1 changed files with 18 additions and 7 deletions
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25
BizHawk.Client.EmuHawk/tools/GBA/GBAGPUView.cs
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@ -349,14 +349,25 @@ namespace BizHawk.Client.EmuHawk
ushort* palette = (ushort*)palram + 256;
if (!eightbit)
palette += attr2 >> 12 << 4;
if (!eightbit)
tiles += 32 * (attr2 & 1023);
else
tiles += 32 * (attr2 & 1022);
int tilestride = 0;
if (twodee)
tilestride = 1024 - tw * (eightbit ? 64 : 32);
int tileindex = eightbit ? attr2 & 1022 : attr2 & 1023;
int tilestride = twodee ? 1024 - tw * (eightbit ? 64 : 32) : 0;
// see if the sprite would read past the end of vram, and skip it if it would
{
int tileend;
if (!twodee)
tileend = tileindex + tw * th * (eightbit ? 2 : 1);
else
tileend = tileindex + tw * (eightbit ? 2 : 1) + (th - 1) * 32;
if (tileend > 1024)
return;
}
tiles += 32 * tileindex;
if (vflip)
dest += pitch * 8 * (th - 1);
if (hflip)