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21 lines
710 B
GLSL
21 lines
710 B
GLSL
// Warning! Beware to use this shader. "discard" command may significally reduce performance.
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// Unfortunately some CG algorithms cannot be implemented on OpenGL ES 2.0 without discarding
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// fragments from depth buffer.
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uniform sampler2D u_colorTex;
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uniform float u_opacity;
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varying vec4 v_texCoords;
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varying vec4 v_maskColor;
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void main()
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{
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vec4 color = texture2D(u_colorTex, v_texCoords.xy);
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vec4 bgColor = texture2D(u_colorTex, v_texCoords.zw) * vec4(v_maskColor.xyz, 1.0);
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vec4 finalColor = mix(color, mix(bgColor, color, color.a), bgColor.a);
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finalColor.a = clamp(color.a + bgColor.a, 0.0, 1.0) * u_opacity * v_maskColor.w;
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if (finalColor.a < 0.01)
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discard;
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gl_FragColor = finalColor;
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}
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