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Diffstat (limited to 'src/graphics/shaders/bandpass.frag')
-rw-r--r-- | src/graphics/shaders/bandpass.frag | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/graphics/shaders/bandpass.frag b/src/graphics/shaders/bandpass.frag new file mode 100644 index 0000000..b52d1df --- /dev/null +++ b/src/graphics/shaders/bandpass.frag @@ -0,0 +1,42 @@ +// +// libavg - Media Playback Engine. +// Copyright (C) 2003-2011 Ulrich von Zadow +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +// Current versions can be found at www.libavg.de +// + +uniform sampler2D u_MinTex; +uniform sampler2D u_MaxTex; +uniform float u_PostScale; +uniform bool u_bInvert; + +#ifndef FRAGMENT_ONLY +varying vec2 v_TexCoord; +varying vec4 v_Color; +#endif + +void main(void) +{ + vec4 min = texture2D(u_MinTex, v_TexCoord); + vec4 max = texture2D(u_MaxTex, v_TexCoord); + gl_FragColor = vec4(0.502, 0.502, 0.502, 0) + (max-min)*u_PostScale; + if (u_bInvert) { + gl_FragColor = vec4(1.004,1.004,1.004,1) - gl_FragColor; + } + gl_FragColor.a = 1.0; +} + |