michael@0: //
michael@0: // Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: //
michael@0: 
michael@0: sampler2D tex : s0;
michael@0: 
michael@0: uniform float4 mode : c0;
michael@0: 
michael@0: // Passthrough Pixel Shader
michael@0: // Outputs texture 0 sampled at texcoord 0.
michael@0: float4 passthroughps(float4 texcoord : TEXCOORD0) : COLOR
michael@0: {
michael@0: 	return tex2D(tex, texcoord.xy);
michael@0: };
michael@0: 
michael@0: // Luminance Conversion Pixel Shader
michael@0: // Outputs sample(tex0, tc0).rrra.
michael@0: // For LA output (pass A) set C0.X = 1, C0.Y = 0.
michael@0: // For L output (A = 1) set C0.X = 0, C0.Y = 1.
michael@0: float4 luminanceps(float4 texcoord : TEXCOORD0) : COLOR
michael@0: {
michael@0: 	float4 tmp = tex2D(tex, texcoord.xy);
michael@0: 	tmp.w = tmp.w * mode.x + mode.y;
michael@0: 	return tmp.xxxw;
michael@0: };
michael@0: 
michael@0: // RGB/A Component Mask Pixel Shader
michael@0: // Outputs sample(tex0, tc0) with options to force RGB = 0 and/or A = 1.
michael@0: // To force RGB = 0, set C0.X = 0, otherwise C0.X = 1.
michael@0: // To force A = 1, set C0.Z = 0, C0.W = 1, otherwise C0.Z = 1, C0.W = 0.
michael@0: float4 componentmaskps(float4 texcoord : TEXCOORD0) : COLOR
michael@0: {
michael@0: 	float4 tmp = tex2D(tex, texcoord.xy);
michael@0: 	tmp.xyz = tmp.xyz * mode.x;
michael@0: 	tmp.w = tmp.w * mode.z + mode.w;
michael@0: 	return tmp;
michael@0: };