qzdoom-gpl/wadsrc/static/shaders/glsl/swshader.vp

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in vec4 AttrPosition;
in vec4 AttrColor0;
in vec4 AttrColor1;
in vec4 AttrTexCoord0;
out vec4 PixelColor0;
out vec4 PixelColor1;
out vec4 PixelTexCoord0;
void main()
{
gl_Position = vec4(AttrPosition.xy / vec2(1920*2,1080*2) * 2.0 - 1.0, 1.0, 1.0);
gl_Position.y = -gl_Position.y;
PixelColor0 = AttrColor0.bgra;
PixelColor1 = AttrColor1.bgra;
PixelTexCoord0 = AttrTexCoord0;
}