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27 lines
613 B
GLSL
27 lines
613 B
GLSL
R"(
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#version 420
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#extension GL_ARB_separate_shader_objects: enable
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layout(location=0) out vec2 tc0;
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#ifdef VULKAN
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#define gl_VertexID gl_VertexIndex
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#endif
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void main()
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{
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vec2 positions[] = {vec2(-1., -1.), vec2(1., -1.), vec2(-1., 1.), vec2(1., 1.)};
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#ifdef VULKAN
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// Origin at top left
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vec2 coords[] = {vec2(0., 0.), vec2(1., 0.), vec2(0., 1.), vec2(1., 1.)};
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#else
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// Origin at bottom left. Flip Y coordinate.
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vec2 coords[] = {vec2(0., 1.), vec2(1., 1.), vec2(0., 0.), vec2(1., 0.)};
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#endif
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tc0 = coords[gl_VertexID % 4];
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vec2 pos = positions[gl_VertexID % 4];
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gl_Position = vec4(pos, 0., 1.);
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}
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)"
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