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: struct VS_OUTPUT
michael@0: {
michael@0:     float4 position : POSITION;
michael@0:     float4 texcoord : TEXCOORD0;
michael@0: };
michael@0: 
michael@0: uniform float4 halfPixelSize : c0;
michael@0: 
michael@0: // Standard Vertex Shader
michael@0: // Input 0 is the homogenous position.
michael@0: // Outputs the homogenous position as-is.
michael@0: // Outputs a tex coord with (0,0) in the upper-left corner of the screen and (1,1) in the bottom right.
michael@0: // C0.X must be negative half-pixel width, C0.Y must be half-pixel height. C0.ZW must be 0.
michael@0: VS_OUTPUT standardvs(in float4 position : POSITION)
michael@0: {
michael@0:     VS_OUTPUT Out;
michael@0: 
michael@0:     Out.position = position + halfPixelSize;
michael@0:     Out.texcoord = position * float4(0.5, -0.5, 1.0, 1.0) + float4(0.5, 0.5, 0, 0);
michael@0: 
michael@0:     return Out;
michael@0: };
michael@0: 
michael@0: // Flip Y Vertex Shader
michael@0: // Input 0 is the homogenous position.
michael@0: // Outputs the homogenous position as-is.
michael@0: // Outputs a tex coord with (0,1) in the upper-left corner of the screen and (1,0) in the bottom right.
michael@0: // C0.XY must be the half-pixel width and height. C0.ZW must be 0.
michael@0: VS_OUTPUT flipyvs(in float4 position : POSITION)
michael@0: {
michael@0:     VS_OUTPUT Out;
michael@0: 
michael@0:     Out.position = position + halfPixelSize;
michael@0:     Out.texcoord = position * float4(0.5, 0.5, 1.0, 1.0) + float4(0.5, 0.5, 0, 0);
michael@0: 
michael@0:     return Out;
michael@0: };