24 lines
901 B
GLSL
24 lines
901 B
GLSL
uniform float left;
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uniform float top;
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uniform float right;
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uniform float bottom;
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uniform float feather;
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uniform mediump float amount_val;
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vec4 process(vec4 col) {
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float alpha = col.a;
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if (feather == 0.0) {
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if (v_texcoord.x < (left*0.01) || v_texcoord.y < (top*0.01) || v_texcoord.x > (1.0-(right*0.01)) || v_texcoord.y > (1.0-(bottom*0.01))) {
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alpha = 0.0;
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}
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} else {
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float f = pow(2.0, 10.0-(feather*0.1));
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if (left > 0.0) alpha = alpha * clamp(((v_texcoord.x+(0.5/f))-(left*0.01))*f, 0.0, 1.0); // left
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if (top > 0.0) alpha = alpha * clamp(((v_texcoord.y+(0.5/f))-(top*0.01))*f, 0.0, 1.0); // top
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if (right > 0.0) alpha = alpha * clamp((((1.0-v_texcoord.x)+(0.5/f))-(right*0.01))*f, 0.0, 1.0); // right
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if (bottom > 0.0) alpha = alpha * clamp((((1.0-v_texcoord.y)+(0.5/f))-(bottom*0.01))*f, 0.0, 1.0); // bottom
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}
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return vec4(col.rgb*alpha, alpha);
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} |