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# Copyright (C) 2010 Team XBMC
# This Program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
# This Program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with XBMC; see the file COPYING. If not, write to
# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
PARAM yuvmat[4] = { program.local[0..3] };
#stepx, stepy, width, height
PARAM dims[1] = { program.local[4] };
TEMP pos;
MAD pos.x , dims[0].x, -0.25, fragment.texcoord[0].x;
MOV pos.y , fragment.texcoord[0].y;
MUL f.x , dims[0].z, pos.x;
MUL f.y , dims[0].w, pos.y;
FRC f , f;
TEMP c1pos;
TEMP c2pos;
SUB c1pos.x, 0.5, f.x;
SUB c2pos.x, 1.5, f.x;
MAD c1pos.x, c1pos.x, dims[0].x, pos.x;
MAD c2pos.x, c2pos.x, dims[0].x, pos.x;
MOV c1pos.y, pos.y;
MOV c2pos.y, pos.y;
TEMP c1;
TEMP c2;
TEX c1, c1pos, texture[0], 2D;
TEX c2, c2pos, texture[0], 2D;
TEMP cint;
MUL cint.x, f.x, 2.0;
MAD cint.y, f.x, 2.0, -1.0;
SGE cint.z, f.x, 0.5;
TEMP yuv;
LRP yuv.g, cint.x, c1.a , c1.g;
LRP yuv.b, cint.y, c2.g , c1.a;
LRP yuv.r, cint.z, yuv.b, yuv.g;
LRP yuv.g, f.x , c2.b , c1.b;
LRP yuv.b, f.x , c2.r , c1.r;
TEMP rgb;
DPH rgb.r, yuv, yuvmat[0];
DPH rgb.g, yuv, yuvmat[1];
DPH rgb.b, yuv, yuvmat[2];
MOV rgb.a, fragment.color.a;
MOV result.color, rgb;
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