1//
2// Copyright 2012 The ANGLE Project Authors. All rights reserved.
3// Use of this source code is governed by a BSD-style license that can be
4// found in the LICENSE file.
5//
6
7struct VS_OUTPUT
8{
9    float4 position : POSITION;
10    float4 texcoord : TEXCOORD0;
11};
12
13uniform float4 halfPixelSize : c0;
14uniform float4 texcoordOffset : c1;
15
16// Standard Vertex Shader
17// Input 0 is the homogenous position.
18// Outputs the homogenous position as-is.
19// Outputs a tex coord with (0,0) in the upper-left corner of the screen and (1,1) in the bottom right.
20// C0.X must be negative half-pixel width, C0.Y must be half-pixel height. C0.ZW must be 0.
21VS_OUTPUT standardvs(in float4 position : POSITION)
22{
23    VS_OUTPUT Out;
24
25    Out.position = position + halfPixelSize;
26    Out.texcoord = ((position * float4(0.5, -0.5, 1.0, 1.0) + float4(0.5, 0.5, 0, 0)) * float4(texcoordOffset.zw, 1.0, 1.0)) + float4(texcoordOffset.xy, 0, 0);
27
28    return Out;
29};
30