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kaplademo/source/kaplaDemo/AABox.h

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+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//  * Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//  * Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+//  * Neither the name of NVIDIA CORPORATION nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+// PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Copyright (c) 2018 NVIDIA Corporation. All rights reserved.
+//--------------------------------------------------------------------------------------
+//
+// Implementation of different antialiasing methods.
+// - typical MSAA
+// - CSAA
+// - Hardware AA mixed with FBO for supersampling pass
+//   - simple downsampling
+//   - downsampling with 1 or 2 kernel filters
+//
+// AABox is the class that will handle everything related to supersampling through 
+// an offscreen surface defined thanks to FBO
+// Basic use is :
+//
+//  Initialize()
+//  ...
+//  Activate(int x=0, int y=0)
+//    Draw the scene (so, in the offscreen supersampled buffer)
+//  Deactivate()
+//  Draw() : downsample to backbuffer
+//  ...
+//  Destroy()
+//
+//--------------------------------------------------------------------------------------
+#define FB_SS 0
+#include <Cg/CgGL.h>
+#include <string>
+class AABox
+{
+public:
+  AABox(std::string path); 
+  ~AABox();
+
+  bool Initialize(int w, int h, float ssfact, int depthSamples, int coverageSamples);
+  void Destroy();
+
+  void Activate(int x=0, int y=0);
+  void Deactivate();
+  void Rebind();
+  void Draw(int technique);
+  int getBufW() const {return bufw;};
+  int getBufH() const {return bufh;};
+  GLuint getTextureID() {return textureID;};
+
+  CGparameter   cgBlendFactor;
+//protected:
+  bool          bValid;
+  bool          bCSAA;
+
+  int           vpx, vpy, vpw, vph;
+  int           posx, posy;
+  int           bufw, bufh;
+
+  CGcontext     cgContext;
+  CGeffect      cgEffect;
+  CGtechnique   cgTechnique[4];
+  CGpass        cgPassDownSample;
+  CGpass        cgPassDrawFinal;
+  GLuint        textureID;
+  GLuint        textureDepthID;
+  CGparameter   cgSrcSampler;
+  CGparameter   cgSSsampler;
+  CGparameter   cgDepthSSsampler;
+  CGparameter	cgTexelSize;
+  GLuint        fb;
+  GLuint        fbms;
+  GLuint        depth_rb;
+  GLuint        color_rb;
+  GLuint		oldFbo;
+  std::string path;
+
+  bool          initRT(int depthSamples, int coverageSamples);
+};