31 lines
784 B
GLSL
31 lines
784 B
GLSL
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#version 450
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#extension GL_ARB_separate_shader_objects : enable
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layout(location = 0) in vec2 fUv;
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layout(location = 1) in flat uint fChannels;
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layout(location = 0) out vec4 result;
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layout(binding = 1) uniform Opt
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{
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bool preMultiply;
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vec4 multiplier;
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} opt;
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layout(binding = 2) uniform sampler2D render;
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void main()
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{
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result = opt.multiplier;
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if (fChannels == 1)
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result *= vec4(texture(render, fUv).rrr, 1.0f);
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else if (fChannels == 2)
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result *= vec4(texture(render, fUv).rrr, texture(render, fUv).g);
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else if (fChannels == 3)
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result *= vec4(texture(render, fUv).rgb, 1.0f);
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else if (fChannels == 4)
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result *= texture(render, fUv).rgba;
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if (opt.preMultiply)
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result = vec4(result.rgb * result.a, result.a);
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}
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