25 lines
671 B
GLSL
25 lines
671 B
GLSL
uniform sampler2D winTexture;
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uniform float windowWidth;
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uniform float windowHeight;
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uniform float opacity;
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uniform float front;
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vec2 pix2tex(vec2 pix)
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{
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return vec2(pix.x / windowWidth, pix.y / windowHeight);
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}
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void main()
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{
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if( front > 0.0 && gl_FrontFacing )
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discard;
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if( front < 0.0 && !gl_FrontFacing )
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discard;
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// remove the shadow decoration quads
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if( gl_TexCoord[0].x < 0.0 || gl_TexCoord[0].x > windowWidth ||
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gl_TexCoord[0].y < 0.0 || gl_TexCoord[0].y > windowHeight )
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discard;
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gl_FragColor.rgba = texture2D(winTexture, pix2tex(gl_TexCoord[0].xy)).rgba;
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gl_FragColor.a = gl_FragColor.a * opacity;
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}
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