armorpaint/Shaders/painter/glsl/layer_merge.vert.glsl

#version 330
in vec2 pos;
out vec2 texCoord;
void main() {
	gl_Position = vec4(pos.xy, 0.0, 1.0);
	const vec2 madd = vec2(0.5, 0.5);
	texCoord = pos.xy * madd + madd;
}