43 lines
1.4 KiB
Scala
43 lines
1.4 KiB
Scala
$input v_texcoord0
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/*
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* Copyright 2018 Eric Arnebäck. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
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*/
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#include "../common/common.sh"
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SAMPLER2D(s_tex, 0);
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// pixel size of the target texture.
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uniform vec4 u_pixelSize;
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void main()
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{
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vec2 halfpixel = 0.5 * vec2(u_pixelSize.x, u_pixelSize.y);
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vec2 oneepixel = 1.0 * vec2(u_pixelSize.x, u_pixelSize.y);
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vec2 uv = v_texcoord0.xy;
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vec4 sum = vec4(0.0, 0.0, 0.0, 0.0);
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sum += (4.0/32.0) * texture2D(s_tex, uv).rgba;
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sum += (4.0/32.0) * texture2D(s_tex, uv + vec2(-halfpixel.x, -halfpixel.y) );
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sum += (4.0/32.0) * texture2D(s_tex, uv + vec2(+halfpixel.x, +halfpixel.y) );
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sum += (4.0/32.0) * texture2D(s_tex, uv + vec2(+halfpixel.x, -halfpixel.y) );
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sum += (4.0/32.0) * texture2D(s_tex, uv + vec2(-halfpixel.x, +halfpixel.y) );
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sum += (2.0/32.0) * texture2D(s_tex, uv + vec2(+oneepixel.x, 0.0) );
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sum += (2.0/32.0) * texture2D(s_tex, uv + vec2(-oneepixel.x, 0.0) );
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sum += (2.0/32.0) * texture2D(s_tex, uv + vec2(0.0, +oneepixel.y) );
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sum += (2.0/32.0) * texture2D(s_tex, uv + vec2(0.0, -oneepixel.y) );
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sum += (1.0/32.0) * texture2D(s_tex, uv + vec2(+oneepixel.x, +oneepixel.y) );
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sum += (1.0/32.0) * texture2D(s_tex, uv + vec2(-oneepixel.x, +oneepixel.y) );
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sum += (1.0/32.0) * texture2D(s_tex, uv + vec2(+oneepixel.x, -oneepixel.y) );
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sum += (1.0/32.0) * texture2D(s_tex, uv + vec2(-oneepixel.x, -oneepixel.y) );
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gl_FragColor.xyzw = sum;
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}
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