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ppu_write: put new byte value only if it's different

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Sigrid Solveig Haflínudóttir 2021-11-02 18:18:30 +01:00
parent ca5675419e
commit 28aaf40e6d
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GPG Key ID: FC8DDA5A6A7456C4
1 changed files with 3 additions and 2 deletions
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src/devices/ppu.c
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@ -61,11 +61,12 @@ ppu_write(Ppu *p, Uint8 layer, Uint16 x, Uint16 y, Uint8 color)
Uint8 pix = p->pixels[row]; Uint8 pix = p->pixels[row];
Uint8 mask = ~(0x3 << shift); Uint8 mask = ~(0x3 << shift);
Uint8 pixnew = (pix & mask) + (color << shift); Uint8 pixnew = (pix & mask) + (color << shift);
if(pix != pixnew){
p->pixels[row] = pixnew; p->pixels[row] = pixnew;
if(pix != pixnew)
p->reqdraw = 1; p->reqdraw = 1;
} }
} }
}
void void
ppu_1bpp(Ppu *p, Uint8 layer, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 color, Uint8 flipx, Uint8 flipy) ppu_1bpp(Ppu *p, Uint8 layer, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 color, Uint8 flipx, Uint8 flipy)