mirror of https://github.com/axmolengine/axmol.git
54 lines
1.1 KiB
Plaintext
54 lines
1.1 KiB
Plaintext
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#version 310 es
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precision highp float;
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precision highp int;
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layout(location = COLOR0) in vec4 v_color;
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layout(location = TEXCOORD0) in vec2 v_texCoord;
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layout(binding = 0) uniform sampler2D u_tex0;
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layout(std140) uniform fs_ub {
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vec2 resolution;
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float blurRadius;
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float sampleNum;
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};
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vec4 blur(vec2);
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layout(location = SV_Target0) out vec4 FragColor;
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void main(void)
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{
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vec4 col = blur(v_texCoord); //* v_color.rgb;
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FragColor = vec4(col) * v_color;
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}
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vec4 blur(vec2 p)
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{
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if (blurRadius > 0.0 && sampleNum > 1.0)
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{
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vec4 col = vec4(0);
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vec2 unit = 1.0 / resolution.xy;
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float r = blurRadius;
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float sampleStep = r / sampleNum;
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float count = 0.0;
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for(float x = -r; x < r; x += sampleStep)
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{
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for(float y = -r; y < r; y += sampleStep)
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{
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float weight = (r - abs(x)) * (r - abs(y));
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col += texture(u_tex0, p + vec2(x * unit.x, y * unit.y)) * weight;
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count += weight;
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}
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}
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return col / count;
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}
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return texture(u_tex0, p);
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}
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