1 files changed, 136 insertions, 0 deletions
diff --git a/src/graphics/GPUShadowFilter.cpp b/src/graphics/GPUShadowFilter.cpp
new file mode 100644
index 0000000..6c8f0ec
--- /dev/null
+++ b/src/graphics/GPUShadowFilter.cpp
@@ -0,0 +1,136 @@
+//
+//  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 "GPUShadowFilter.h"
+#include "Bitmap.h"
+#include "ShaderRegistry.h"
+#include "OGLShader.h"
+#include "ImagingProjection.h"
+
+#include "../base/ObjectCounter.h"
+#include "../base/MathHelper.h"
+#include "../base/Exception.h"
+
+#include <string.h>
+#include <iostream>
+
+#define SHADERID_HORIZ "horizshadow"
+#define SHADERID_VERT "vertshadow"
+
+using namespace std;
+
+namespace avg {
+
+GPUShadowFilter::GPUShadowFilter(const IntPoint& size, const glm::vec2& offset, 
+        float stdDev, float opacity, const Pixel32& color)
+    : GPUFilter(SHADERID_HORIZ, true, false, 2)
+{
+    ObjectCounter::get()->incRef(&typeid(*this));
+
+    GLContext::getCurrent()->ensureFullShaders("GPUShadowFilter");
+
+    setDimensions(size, stdDev, offset);
+    createShader(SHADERID_VERT);
+    setParams(offset, stdDev, opacity, color);
+    OGLShaderPtr pShader = getShader();
+    m_pHorizWidthParam = pShader->getParam<float>("u_Width");
+    m_pHorizRadiusParam = pShader->getParam<int>("u_Radius");
+    m_pHorizTextureParam = pShader->getParam<int>("u_Texture");
+    m_pHorizKernelTexParam = pShader->getParam<int>("u_KernelTex");
+    m_pHorizOffsetParam = pShader->getParam<glm::vec2>("u_Offset");
+
+    pShader = avg::getShader(SHADERID_VERT);
+    m_pVertWidthParam = pShader->getParam<float>("u_Width");
+    m_pVertRadiusParam = pShader->getParam<int>("u_Radius");
+    m_pVertTextureParam = pShader->getParam<int>("u_HBlurTex");
+    m_pVertKernelTexParam = pShader->getParam<int>("u_KernelTex");
+    m_pVertColorParam = pShader->getParam<Pixel32>("u_Color");
+    m_pVertOrigTexParam = pShader->getParam<int>("u_OrigTex");
+    m_pVertDestPosParam = pShader->getParam<glm::vec2>("u_DestPos");
+    m_pVertDestSizeParam = pShader->getParam<glm::vec2>("u_DestSize");
+}
+
+GPUShadowFilter::~GPUShadowFilter()
+{
+    ObjectCounter::get()->decRef(&typeid(*this));
+}
+
+void GPUShadowFilter::setParams(const glm::vec2& offset, float stdDev, float opacity, 
+        const Pixel32& color)
+{
+    m_Offset = offset;
+    m_StdDev = stdDev;
+    m_Opacity = opacity;
+    m_Color = color;
+    m_pGaussCurveTex = calcBlurKernelTex(m_StdDev, m_Opacity, false);
+    setDimensions(getSrcSize(), stdDev, offset);
+    IntRect destRect2(IntPoint(0,0), getDestRect().size());
+    m_pProjection2 = ImagingProjectionPtr(new ImagingProjection(
+            getDestRect().size(), destRect2));
+}
+
+void GPUShadowFilter::applyOnGPU(GLTexturePtr pSrcTex)
+{
+    int kernelWidth = m_pGaussCurveTex->getSize().x;
+    getFBO(1)->activate();
+    getShader()->activate();
+    m_pHorizWidthParam->set(float(kernelWidth));
+    m_pHorizRadiusParam->set((kernelWidth-1)/2);
+    m_pHorizTextureParam->set(0);
+    m_pHorizKernelTexParam->set(1);
+    IntPoint size = getSrcSize();
+    glm::vec2 texOffset(m_Offset.x/size.x, m_Offset.y/size.y);
+    m_pHorizOffsetParam->set(texOffset);
+    m_pGaussCurveTex->activate(GL_TEXTURE1);
+    draw(pSrcTex);
+
+    getFBO(0)->activate();
+    OGLShaderPtr pVShader = avg::getShader(SHADERID_VERT);
+    pVShader->activate();
+    m_pVertWidthParam->set(float(kernelWidth));
+    m_pVertRadiusParam->set((kernelWidth-1)/2);
+    m_pVertTextureParam->set(0);
+    m_pVertKernelTexParam->set(1);
+    m_pVertColorParam->set(m_Color);
+
+    pSrcTex->activate(GL_TEXTURE2);
+    m_pVertOrigTexParam->set(2);
+    FRect destRect = getRelDestRect();
+    m_pVertDestPosParam->set(destRect.tl);
+    m_pVertDestSizeParam->set(destRect.size());
+    getDestTex(1)->activate(GL_TEXTURE0);
+    m_pProjection2->draw(avg::getShader(SHADERID_VERT));
+}
+
+void GPUShadowFilter::setDimensions(IntPoint size, float stdDev, const glm::vec2& offset)
+{
+    int radius = getBlurKernelRadius(stdDev);
+    IntPoint radiusOffset(radius, radius);
+    IntPoint intOffset(offset);
+    IntRect destRect(intOffset-radiusOffset, intOffset+size+radiusOffset+IntPoint(1,1));
+    destRect.expand(IntRect(IntPoint(0,0), size));
+    //TODO FIX OPENGLESV2
+    #ifndef AVG_ENABLE_EGL
+        GPUFilter::setDimensions(size, destRect, GL_CLAMP_TO_BORDER);
+    #endif
+}
+ 
+}