62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
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// Copyright (C) 2003-2008 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "Common.h"
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#include "Globals.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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// Also, write a crazy SSE2 optimized version of this :P
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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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