44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
#include "XFB.h"
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#include "Common.h"
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// __________________________________________________________________________________________________
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// Video_UpdateXFB
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//
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// TODO(ector): Write protect XFB. As soon as something pokes there,
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// switch to a mode where we actually display the XFB on top of the 3D.
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// If no writes have happened within 5 frames, revert to normal mode.
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int bound(int i)
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{
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return (i>255)?255:((i<0)?0:i);
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}
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void yuv2rgb(int y, int u, int v, int &r, int &g, int &b)
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{
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b = bound((76283*(y - 16) + 132252*(u - 128))>>16);
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g = bound((76283*(y - 16) - 53281 *(v - 128) - 25624*(u - 128))>>16); //last one u?
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r = bound((76283*(y - 16) + 104595*(v - 128))>>16);
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}
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void ConvertXFB(int *dst, const u8* _pXFB, int width, int height)
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{
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const unsigned char *src = _pXFB;
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for (int y=0; y < height; y++)
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{
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for (int x = 0; x < width; x++)
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{
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int Y1 = *src++;
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int U = *src++;
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int Y2 = *src++;
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int V = *src++;
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int r,g,b;
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yuv2rgb(Y1,U,V,r,g,b);
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*dst++ = 0xFF000000 | (r<<16) | (g<<8) | (b);
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yuv2rgb(Y2,U,V,r,g,b);
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*dst++ = 0xFF000000 | (r<<16) | (g<<8) | (b);
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}
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}
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}
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