mirror of https://github.com/axmolengine/axmol.git
45 lines
1.1 KiB
Plaintext
45 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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/*
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Created by guanghui on 4/8/14.
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http://www.idevgames.com/forums/thread-3010.html
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*/
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layout(location = TEXCOORD0) in vec2 v_texCoord;
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layout(location = COLOR0) in vec4 v_color;
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layout(binding = 0) uniform sampler2D u_tex0;
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layout(std140, binding = 0) uniform fs_ub {
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vec3 u_outlineColor;
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float u_threshold;
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float u_radius;
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};
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layout(location = SV_Target0) out vec4 FragColor;
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void main()
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{
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float radius = u_radius;
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vec4 accum = vec4(0.0);
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vec4 normal = vec4(0.0);
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normal = texture(u_tex0, vec2(v_texCoord.x, v_texCoord.y));
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accum += texture(u_tex0, vec2(v_texCoord.x - radius, v_texCoord.y - radius));
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accum += texture(u_tex0, vec2(v_texCoord.x + radius, v_texCoord.y - radius));
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accum += texture(u_tex0, vec2(v_texCoord.x + radius, v_texCoord.y + radius));
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accum += texture(u_tex0, vec2(v_texCoord.x - radius, v_texCoord.y + radius));
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accum *= u_threshold;
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accum.rgb = u_outlineColor * accum.a;
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accum.a = 1.0;
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normal = ( accum * (1.0 - normal.a)) + (normal * normal.a);
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FragColor = v_color * normal;
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}
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