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/*
* Copyright (C) 2010-2013 Team XBMC
* http://www.xbmc.org
*
* 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
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* 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.
* http://www.gnu.org/copyleft/gpl.html
*
*/
precision mediump float;
uniform sampler2D m_sampY;
uniform sampler2D m_sampU;
uniform sampler2D m_sampV;
varying vec2 m_cordY;
varying vec2 m_cordU;
varying vec2 m_cordV;
uniform float m_alpha;
uniform mat4 m_yuvmat;
uniform float m_stepX;
uniform float m_stepY;
uniform int m_field;
void main()
{
vec4 yuv, rgb;
vec2 offsetY;
vec2 offsetU;
vec2 offsetV;
float temp1 = mod(m_cordY.y, 2*m_stepY);
offsetY = m_cordY;
offsetU = m_cordU;
offsetV = m_cordV;
offsetY.y -= (temp1 - m_stepY/2 + float(m_field)*m_stepY);
offsetU.y -= (temp1 - m_stepY/2 + float(m_field)*m_stepY)/2;
offsetV.y -= (temp1 - m_stepY/2 + float(m_field)*m_stepY)/2;
yuv.rgba = vec4(texture2D(m_sampY, offsetY).r, texture2D(m_sampU, offsetU).r, texture2D(m_sampV, offsetV).r, 1.0);
rgb = m_yuvmat * yuv;
rgb.a = m_alpha;
gl_FragColor = rgb;
}
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