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20 lines
509 B
GLSL
Executable File
20 lines
509 B
GLSL
Executable File
precision highp float;
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varying vec2 varTexcoord;
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uniform sampler2D texture;
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uniform sampler2D mask;
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uniform vec4 color;
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void main (void)
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{
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vec4 dst = texture2D(texture, varTexcoord.st, 0.0);
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float srcAlpha = color.a * texture2D(mask, varTexcoord.st, 0.0).a;
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float outAlpha = srcAlpha + dst.a * (1.0 - srcAlpha);
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gl_FragColor.rgb = (color.rgb * srcAlpha + dst.rgb * dst.a * (1.0 - srcAlpha)) / outAlpha;
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gl_FragColor.a = outAlpha;
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gl_FragColor.rgb *= gl_FragColor.a;
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} |