/******************************************************************************

* The MIT License (MIT)

*

* Copyright (c) 2015-2017 Baldur Karlsson

*

* Permission is hereby granted, free of charge, to any person obtaining a copy

* of this software and associated documentation files (the "Software"), to deal

* in the Software without restriction, including without limitation the rights

* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

* copies of the Software, and to permit persons to whom the Software is

* furnished to do so, subject to the following conditions:

*

* The above copyright notice and this permission notice shall be included in

* all copies or substantial portions of the Software.

*

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

* THE SOFTWARE.

******************************************************************************/

#ifndef OPENGL_ES

out gl_PerVertex

{

vec4 gl_Position;

float gl_PointSize;

};

#endif

layout (location = 0) out vec2 uv;

void main(void)

{

const vec4 verts[4] = vec4[4](vec4(-1.0, -1.0, 0.5, 1.0),

vec4( 1.0, -1.0, 0.5, 1.0),

vec4(-1.0, 1.0, 0.5, 1.0),

vec4( 1.0, 1.0, 0.5, 1.0));

gl_Position = verts[VERTEX_ID];

uv = gl_Position.xy * 0.5f + 0.5f;

}