38 lines
688 B
GLSL
38 lines
688 B
GLSL
#version GLSL_VERSION
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#define ALPHA_TYPE
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uniform sampler2D image;
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#ifdef ALPHA_MASK
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uniform uint fg;
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#else
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uniform float inactive_text_alpha;
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#endif
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in vec2 texcoord;
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out vec4 color;
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#ifdef ALPHA_MASK
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const uint BYTE_MASK = uint(0xFF);
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vec3 color_to_vec(uint c) {
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uint r, g, b;
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r = (c >> 16) & BYTE_MASK;
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g = (c >> 8) & BYTE_MASK;
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b = c & BYTE_MASK;
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return vec3(float(r) / 255.0, float(g) / 255.0, float(b) / 255.0);
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}
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#endif
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void main() {
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color = texture(image, texcoord);
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#ifdef ALPHA_MASK
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color = vec4(color_to_vec(fg), color.r);
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#else
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color.a *= inactive_text_alpha;
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#ifdef PREMULT
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color = vec4(color.rgb * color.a, color.a);
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#endif
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#endif
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}
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