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34 lines
1.0 KiB
GLSL
34 lines
1.0 KiB
GLSL
// ============================================================================
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//
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// Program: Visualization Toolkit
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// Module: vtkGaussianBlurPassShader_fs.glsl
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//
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// Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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// All rights reserved.
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// See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// ============================================================================
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// Fragment shader used by the gaussian blur filter render pass.
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#version 110
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uniform sampler2D source;
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uniform float coef[3];
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uniform float offsetx;
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uniform float offsety;
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void main(void)
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{
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vec2 tcoord=gl_TexCoord[0].st;
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vec2 offset=vec2(offsetx,offsety);
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gl_FragColor=coef[0]*texture2D(source,tcoord-offset)
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+coef[1]*texture2D(source,tcoord)
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+coef[2]*texture2D(source,tcoord+offset);
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}
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