31 lines
711 B
GLSL
31 lines
711 B
GLSL
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#version 430 core
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layout (location = 0) in vec2 position;
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layout (location = 1) in vec4 color;
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layout (location = 2) in vec2 uv;
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out Fragment
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{
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// @Performance: Are this fields aligned to vec4? Is it better to reorder them?
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vec2 position;
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vec4 color;
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vec2 uv;
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} frag;
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uniform int width; // Width of the screen in pixels
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uniform int height; // Height of the screen in pixels
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void main()
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{
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frag.position = position;
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frag.color = color;
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frag.uv = uv;
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vec2 screen = vec2(width, height);
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vec2 p = position / screen * 2.0 - 1.0; // Position relative to the screen size, in range [-1,+1)
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p.y = -p.y; // OpenGL coordinates have y up, pixel coordinates have y down
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gl_Position = vec4(p, 0.0, 1.0);
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}
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