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22598ceb4f
sample the texture four, not sixteen, times if we turn on linear filtering and sample between the texels).
24 lines
714 B
GLSL
24 lines
714 B
GLSL
#version 120
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//
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// occlusion_blur.frag
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// fragment shader
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//
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// Created by Andrzej Kapolka on 8/16/13.
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// Copyright (c) 2013 High Fidelity, Inc. All rights reserved.
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//
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// the original texture
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uniform sampler2D originalTexture;
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// the scale for the blur kernel
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uniform vec2 blurScale;
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void main(void) {
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vec2 minExtents = gl_TexCoord[0].st + blurScale * vec2(-0.5, -0.5);
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vec2 maxExtents = gl_TexCoord[0].st + blurScale * vec2(1.5, 1.5);
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gl_FragColor = (texture2D(originalTexture, minExtents) +
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texture2D(originalTexture, vec2(maxExtents.s, minExtents.t)) +
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texture2D(originalTexture, vec2(minExtents.s, maxExtents.t)) +
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texture2D(originalTexture, maxExtents)) * 0.25;
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}
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