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b05b43f027
from the frame buffer requires it to have an alpha channel, which actually does something on OS X (meaning we have to set it to 1.0). We're going to want to render to texture anyway for SSAO (or other effects).
36 lines
1.9 KiB
GLSL
36 lines
1.9 KiB
GLSL
#version 120
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//
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// vertical_blur.frag
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// fragment shader
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//
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// Created by Andrzej Kapolka on 8/8/13.
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// Copyright (c) 2013 High Fidelity, Inc. All rights reserved.
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//
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// the texture containing the original color
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uniform sampler2D originalTexture;
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// the texture containing the horizontally blurred color
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uniform sampler2D horizontallyBlurredTexture;
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void main(void) {
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float dt = dFdy(gl_TexCoord[0].t);
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vec4 blurred = (texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * -15.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * -13.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * -11.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * -9.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * -7.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * -4.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * -3.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * -1.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * 1.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * 3.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * 5.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * 7.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * 9.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * 11.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * 13.5)) +
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texture2D(horizontallyBlurredTexture, gl_TexCoord[0].st + vec2(0.0, dt * 15.5))) / 16.0;
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gl_FragColor = blurred * blurred.a + texture2D(originalTexture, gl_TexCoord[0].st);
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}
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