24 lines
580 B
GLSL
24 lines
580 B
GLSL
#version 330 core
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// viewsize.x = viewport width in pixels; viewsize.y = viewport height in pixels
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uniform ivec2 viewsize;
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uniform ivec2 texturesize;
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// both position and and uv are in pixels, they where converted to floats when
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// passed to the shader
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layout(location = 0) in vec2 position;
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layout(location = 1) in vec2 txcoord;
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out vec2 uv;
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void main()
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{
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vec4 pos = vec4(position.x, position.y, 0.0f, 1.0f);
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vec2 hsize = vec2(float(viewsize.x)/2.0f, float(viewsize.y)/2.0f);
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pos.xy = (pos.xy - hsize) / hsize;
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gl_Position = pos;
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uv = txcoord / float(texturesize);
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}
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