// Projector Film Sepia Toning=ps_2_0
// http://forum.doom9.org/showthread.php?t=157634

// psp_projector film sepia toning for SD&HD video input=ps_2_0
// (C) 2011 Jan-Willem Krans (janwillem32 <at> hotmail.com)
// This file is part of Video pixel shader pack.
// 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, version 2.
// 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 this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

// projector film sepia toning for SD&HD video input
// This shader should not be run as a screen space pixel shader.
// This shader requires compiling with ps_2_0, but higher is better, see http://en.wikipedia.org/wiki/Pixel_shader to look up what PS version your video card supports.
// If possible, avoid compiling with the software emulation modes (ps_?_sw). Pixel shaders require a lot of processing power to run in real-time software mode.
// If used in combination with other shaders and filters, place this and other Y'CbCr-type shaders at the beginning of the processing chain.
// Use this shader to apply an effect that looks like sepia film toning.

sampler s0;
float2 c0;

float4 main(float2 tex : TEXCOORD0) : COLOR
{
	float3 s1 = tex2D(s0, tex).rgb;// original pixel
	float3 sg;
	if(c0.x < 1120 && c0.y < 630) sg = float3(.356, .587, .057);// SD grayscale, sepia film sensitive
	else sg = float3(.2487, .7152, .0361);// HD grayscale, sepia film sensitive
	return pow(dot(s1, sg), float4(3/5., 1, 3, 1));// apply sepia-like gamma functions and output
}