1 files changed, 78 insertions, 0 deletions
diff --git a/src/graphics/GPUBandpassFilter.cpp b/src/graphics/GPUBandpassFilter.cpp
new file mode 100644
index 0000000..23171ec
--- /dev/null
+++ b/src/graphics/GPUBandpassFilter.cpp
@@ -0,0 +1,78 @@
+//
+//  libavg - Media Playback Engine. 
+//  Copyright (C) 2003-2014 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
+//
+
+#include "GPUBandpassFilter.h"
+#include "Bitmap.h"
+#include "ShaderRegistry.h"
+#include "OGLShader.h"
+
+#include "../base/ObjectCounter.h"
+#include "../base/Exception.h"
+
+#include <iostream>
+
+#define SHADERID "bandpass"
+
+using namespace std;
+
+namespace avg {
+
+GPUBandpassFilter::GPUBandpassFilter(const IntPoint& size, PixelFormat pfSrc, 
+        float min, float max, float postScale, bool bInvert, bool bStandalone)
+    : GPUFilter(pfSrc, B8G8R8A8, bStandalone, SHADERID),
+      m_PostScale(postScale),
+      m_bInvert(bInvert),
+      m_MinFilter(size, pfSrc, R32G32B32A32F, min, true, false, true),
+      m_MaxFilter(size, pfSrc, R32G32B32A32F, max, true, false, true)
+{
+    ObjectCounter::get()->incRef(&typeid(*this));
+    
+    GLContext::getCurrent()->ensureFullShaders("GPUBandpassFilter");
+
+    setDimensions(size);
+    OGLShaderPtr pShader = getShader();
+    m_pMinTexParam = pShader->getParam<int>("u_MinTex");
+    m_pMaxTexParam = pShader->getParam<int>("u_MaxTex");
+    m_pPostScaleParam = pShader->getParam<float>("u_PostScale");
+    m_pInvertParam = pShader->getParam<int>("u_bInvert");
+}
+
+GPUBandpassFilter::~GPUBandpassFilter()
+{
+    ObjectCounter::get()->decRef(&typeid(*this));
+}
+
+void GPUBandpassFilter::applyOnGPU(GLTexturePtr pSrcTex)
+{
+    m_MinFilter.apply(pSrcTex);
+    m_MaxFilter.apply(pSrcTex);
+
+    getFBO()->activate();
+    getShader()->activate();
+    m_pMinTexParam->set(0);
+    m_pMaxTexParam->set(1);
+    m_pPostScaleParam->set(float(m_PostScale));
+    m_pInvertParam->set(m_bInvert);
+    m_MaxFilter.getDestTex()->activate(GL_TEXTURE1);
+    draw(m_MinFilter.getDestTex());
+}
+
+}