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Videosoftware realxfb: Fixed a few bugs while testing Zelda: Collectors Edition

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* Don't force a frame to be progressive if it's already progressive.
 * Don't assume the framebuffer will be 640 pixels wide
 * Remember to offset the Luma channel by 16.
This commit is contained in:
Scott Mansell
2013-11-23 18:38:15 +13:00
parent 2abcc32bbd
commit a94940edd3
4 changed files with 19 additions and 17 deletions
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8
Source/Plugins/Plugin_VideoSoftware/Src/EfbInterface.cpp
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@ -511,7 +511,7 @@ namespace EfbInterface
}
// Scanline buffer, leave room for borders
yuv444 scanline[640+2];
yuv444 scanline[fbWidth+2];
// our internal yuv444 type is not normalized, so black is {0, 0, 0} instead of {16, 128, 128}
yuv444 black;
@ -535,17 +535,17 @@ namespace EfbInterface
for (int i = 1, x = left; x < right; i+=2, x+=2)
{
// YU pixel
xfb_in_ram[x].Y = scanline[i].Y;
xfb_in_ram[x].Y = scanline[i].Y + 16;
// we mix our color difrences in 10 bit space so it will round more accurately
// U[i] = 1/4 * U[i-1] + 1/2 * U[i] + 1/4 * U[i+1]
xfb_in_ram[x].UV = 128 + ((scanline[i-1].U + (scanline[i].U << 1) + scanline[i+1].U) >> 2);
// YV pixel
xfb_in_ram[x+1].Y = scanline[i+1].Y;
xfb_in_ram[x+1].Y = scanline[i+1].Y + 16;
// V[i] = 1/4 * V[i-1] + 1/2 * V[i] + 1/4 * V[i+1]
xfb_in_ram[x+1].UV = 128 + ((scanline[i].V + (scanline[i+1].V << 1) + scanline[i+2].V) >> 2);
}
xfb_in_ram += 640;
xfb_in_ram += fbWidth;
}
}