Visualization Library v1.0.3A lightweight C++ OpenGL middleware for 2D/3D graphics |
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00001 /**************************************************************************************/ 00002 /* */ 00003 /* Visualization Library */ 00004 /* http://visualizationlibrary.org */ 00005 /* */ 00006 /* Copyright (c) 2005-2010, Michele Bosi */ 00007 /* All rights reserved. */ 00008 /* */ 00009 /* Redistribution and use in source and binary forms, with or without modification, */ 00010 /* are permitted provided that the following conditions are met: */ 00011 /* */ 00012 /* - Redistributions of source code must retain the above copyright notice, this */ 00013 /* list of conditions and the following disclaimer. */ 00014 /* */ 00015 /* - Redistributions in binary form must reproduce the above copyright notice, this */ 00016 /* list of conditions and the following disclaimer in the documentation and/or */ 00017 /* other materials provided with the distribution. */ 00018 /* */ 00019 /* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND */ 00020 /* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED */ 00021 /* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */ 00022 /* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR */ 00023 /* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES */ 00024 /* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; */ 00025 /* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON */ 00026 /* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */ 00027 /* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS */ 00028 /* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ 00029 /* */ 00030 /**************************************************************************************/ 00031 00032 #ifndef BlitFramebuffer_INCLUDE_ONCE 00033 #define BlitFramebuffer_INCLUDE_ONCE 00034 00035 #include <vlGraphics/RenderEventCallback.hpp> 00036 #include <vlGraphics/FramebufferObject.hpp> 00037 00038 namespace vl 00039 { 00044 class BlitFramebuffer: public RenderEventCallback 00045 { 00046 VL_INSTRUMENT_CLASS(vl::BlitFramebuffer, RenderEventCallback) 00047 00048 public: 00049 BlitFramebuffer() 00050 { 00051 VL_DEBUG_SET_OBJECT_NAME() 00052 setSrcRect(0,0,640,480); 00053 setDstRect(0,0,640,480); 00054 mBufferMask = 0; 00055 mLinearFilteringEnabled = false; 00056 mReadBuffer = RDB_COLOR_ATTACHMENT0; 00057 } 00058 00060 void copyPixels() 00061 { 00062 if (Has_GL_EXT_framebuffer_blit||Has_GL_ARB_framebuffer_object) 00063 { 00064 VL_CHECK_OGL() 00065 00066 // save FBOs 00067 GLint read_fbo = 0; 00068 GLint draw_fbo = 0; 00069 glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &read_fbo); VL_CHECK_OGL() 00070 glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &draw_fbo); VL_CHECK_OGL() 00071 00072 // initializes the source render target 00073 readFramebuffer()->activate(FBB_READ_FRAMEBUFFER); VL_CHECK_OGL() 00074 00075 // override read buffer specified by readFramebuffer()->activate() with the one specified by the user here 00076 glReadBuffer(mReadBuffer); VL_CHECK_OGL() 00077 00078 // activate destination render target 00079 drawFramebuffer()->activate(FBB_DRAW_FRAMEBUFFER); VL_CHECK_OGL() 00080 00081 // note: keep the draw-buffers as specified by drawFramebuffer()->activate() 00082 // ... 00083 00084 // performs the blit 00085 VL_glBlitFramebuffer( mSrcRect[0], mSrcRect[1], mSrcRect[2], mSrcRect[3], 00086 mDstRect[0], mDstRect[1], mDstRect[2], mDstRect[3], 00087 mBufferMask, 00088 mLinearFilteringEnabled ? GL_LINEAR : GL_NEAREST); 00089 VL_CHECK_OGL() 00090 00091 // restore FBOs 00092 VL_glBindFramebuffer( GL_READ_FRAMEBUFFER_EXT, read_fbo ); 00093 VL_CHECK_OGL() 00094 VL_glBindFramebuffer( GL_DRAW_FRAMEBUFFER_EXT, draw_fbo ); 00095 VL_CHECK_OGL() 00096 } 00097 } 00098 00099 virtual bool onRenderingStarted(const RenderingAbstract*) 00100 { 00101 copyPixels(); 00102 return true; 00103 } 00104 00105 virtual bool onRenderingFinished(const RenderingAbstract*) 00106 { 00107 copyPixels(); 00108 return true; 00109 } 00110 00111 virtual bool onRendererStarted(const RendererAbstract*) 00112 { 00113 copyPixels(); 00114 return true; 00115 } 00116 00117 virtual bool onRendererFinished(const RendererAbstract*) 00118 { 00119 copyPixels(); 00120 return true; 00121 } 00122 00124 void setReadFramebuffer(Framebuffer* fbo) { mReadFramebuffer = fbo; } 00125 00127 const Framebuffer* readFramebuffer() const { return mReadFramebuffer.get(); } 00128 00130 Framebuffer* readFramebuffer() { return mReadFramebuffer.get(); } 00131 00133 void setReadBuffer(EReadDrawBuffer read_buffer) { mReadBuffer = read_buffer; } 00134 00136 EReadDrawBuffer readBuffer() const { return mReadBuffer; } 00137 00139 void setDrawFramebuffer(Framebuffer* fbo) { mDrawFramebuffer = fbo; } 00140 00142 const Framebuffer* drawFramebuffer() const { return mDrawFramebuffer.get(); } 00143 00145 Framebuffer* drawFramebuffer() { return mDrawFramebuffer.get(); } 00146 00147 void setSrcRect(int x0, int y0, int x1, int y1) 00148 { 00149 mSrcRect[0] = x0; 00150 mSrcRect[1] = y0; 00151 mSrcRect[2] = x1; 00152 mSrcRect[3] = y1; 00153 } 00154 00155 void setDstRect(int x0, int y0, int x1, int y1) 00156 { 00157 mDstRect[0] = x0; 00158 mDstRect[1] = y0; 00159 mDstRect[2] = x1; 00160 mDstRect[3] = y1; 00161 } 00162 00163 const int* srcRect() const { return mSrcRect; } 00164 const int* dstRect() const { return mDstRect; } 00165 00167 void setBufferMask(int buffer_mask) { mBufferMask = buffer_mask; } 00168 int bufferMask() const { return mBufferMask; } 00169 00170 void setLinearFilteringEnabled( bool enable_linear_filtering ) { mLinearFilteringEnabled = enable_linear_filtering; } 00171 bool linearFilteringEnabled() const { return mLinearFilteringEnabled; } 00172 00173 protected: 00174 ref<Framebuffer> mReadFramebuffer; 00175 ref<Framebuffer> mDrawFramebuffer; 00176 int mSrcRect[4]; 00177 int mDstRect[4]; 00178 int mBufferMask; 00179 EReadDrawBuffer mReadBuffer; 00180 bool mLinearFilteringEnabled; 00181 }; 00182 }; 00183 00184 #endif