16 lines
374 B
GLSL
16 lines
374 B
GLSL
#version GLSL_VERSION
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uniform sampler2D image;
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uniform float opacity;
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uniform float premult;
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in vec2 texcoord;
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out vec4 color;
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void main() {
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color = texture(image, texcoord);
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float alpha = color.a * opacity;
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vec4 premult_color = vec4(color.rgb * alpha, alpha);
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color = vec4(color.rgb, alpha);
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color = premult * premult_color + (1 - premult) * color;
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}
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