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/*
* Copyright (C) 2005-2015 Team XBMC
* http://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, see
* <http://www.gnu.org/licenses/>.
*
*/
#include "convolution_d3d.fx"
#include "output_d3d.fx"
SamplerState RGBSampler : IMMUTABLE
{
AddressU = CLAMP;
AddressV = CLAMP;
Filter = MIN_MAG_MIP_POINT;
};
inline half4 weight(float pos)
{
#ifdef HAS_RGBA
half4 w = g_KernelTexture.Sample(KernelSampler, pos);
#else
half4 w = g_KernelTexture.Sample(KernelSampler, pos).bgra;
#endif
#ifndef HAS_FLOAT_TEXTURE
w = w * 2.0 - 1.0;
#endif
return w;
}
inline half3 pixel(float xpos, float ypos)
{
return g_Texture.Sample(RGBSampler, float2(xpos, ypos)).rgb;
}
inline half3 getLine(float ypos, float4 xpos, half4 linetaps)
{
return
pixel(xpos.r, ypos) * linetaps.r +
pixel(xpos.g, ypos) * linetaps.g +
pixel(xpos.b, ypos) * linetaps.b +
pixel(xpos.a, ypos) * linetaps.a;
}
float4 CONVOLUTION4x4(float2 TextureUV : TEXCOORD0) : SV_TARGET
{
float2 f = frac(TextureUV / g_StepXY + float2(0.5, 0.5));
half4 linetaps = weight(1.0 - f.x);
half4 columntaps = weight(1.0 - f.y);
// kernel generation code made sure taps add up to 1, no need to adjust here.
float2 xystart = (-1.0 - f) * g_StepXY + TextureUV;
float4 xpos = xystart.x + g_StepXY.x * float4(0.0, 1.0, 2.0, 3.0);
float4 ypos = xystart.y + g_StepXY.y * float4(0.0, 1.0, 2.0, 3.0);
float3 rgb =
getLine(ypos.x, xpos, linetaps) * columntaps.r +
getLine(ypos.y, xpos, linetaps) * columntaps.g +
getLine(ypos.z, xpos, linetaps) * columntaps.b +
getLine(ypos.w, xpos, linetaps) * columntaps.a;
return output(g_colorRange.x + g_colorRange.y * saturate(rgb), TextureUV);
}
technique11 SCALER_T
{
pass P0
{
SetVertexShader( VS_SHADER );
SetPixelShader( CompileShader( ps_4_0_level_9_3, CONVOLUTION4x4() ) );
}
};
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