DepthPeeling.hh 6.66 KB
Newer Older
Jan Möbius's avatar
Jan Möbius committed
1 2 3
/*===========================================================================*\
*                                                                            *
*                              OpenFlipper                                   *
Jan Möbius's avatar
Jan Möbius committed
4
*      Copyright (C) 2001-2014 by Computer Graphics Group, RWTH Aachen       *
Jan Möbius's avatar
Jan Möbius committed
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
*                           www.openflipper.org                              *
*                                                                            *
*--------------------------------------------------------------------------- *
*  This file is part of OpenFlipper.                                         *
*                                                                            *
*  OpenFlipper 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 3 of            *
*  the License, or (at your option) any later version with the               *
*  following exceptions:                                                     *
*                                                                            *
*  If other files instantiate templates or use macros                        *
*  or inline functions from this file, or you compile this file and          *
*  link it with other files to produce an executable, this file does         *
*  not by itself cause the resulting executable to be covered by the         *
*  GNU Lesser General Public License. This exception does not however        *
*  invalidate any other reasons why the executable file might be             *
*  covered by the GNU Lesser General Public License.                         *
*                                                                            *
*  OpenFlipper 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 LesserGeneral Public           *
*  License along with OpenFlipper. If not,                                   *
*  see <http://www.gnu.org/licenses/>.                                       *
*                                                                            *
\*===========================================================================*/



#pragma once


#include <QObject>

#include <OpenFlipper/BasePlugin/BaseInterface.hh>
#include <OpenFlipper/BasePlugin/RenderInterface.hh>
#include <OpenFlipper/BasePlugin/LoggingInterface.hh>


#include <ACG/GL/IRenderer.hh>
48
#include <ACG/GL/FBO.hh>
Jan Möbius's avatar
Jan Möbius committed
49 50 51 52 53 54 55 56

class DepthPeeling : public QObject, BaseInterface, RenderInterface, LoggingInterface, ACG::IRenderer
{
  Q_OBJECT
    Q_INTERFACES(BaseInterface)
    Q_INTERFACES(RenderInterface)
    Q_INTERFACES(LoggingInterface)

Matthias Möller's avatar
Matthias Möller committed
57 58 59 60
#if QT_VERSION >= 0x050000
  Q_PLUGIN_METADATA(IID "org.OpenFlipper.Plugins.Plugin-Render-DepthPeeling")
#endif

Jan Möbius's avatar
Jan Möbius committed
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
signals:
  // LoggingInterface
  void log(Logtype _type, QString _message);
  void log(QString _message);


public:
  DepthPeeling();
  ~DepthPeeling();

  QString name() { return (QString("DepthPeeling Plugin")); };
  QString description( ) { return (QString(tr("DepthPeeling Rendering Pipeline (Alpha Version!)"))); };


  /// overide addRenderObject function to include OIT check
  void addRenderObject(ACG::RenderObject* _renderObject);


public slots:
  QString version() { return QString("1.0"); };

82
  QString renderObjectsInfo(bool _outputShaderInfo) { return dumpCurrentRenderObjectsToString(&sortedObjects_[0],_outputShaderInfo); };
83

Jan Möbius's avatar
Jan Möbius committed
84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101

private slots:

  //BaseInterface
  void initializePlugin();
  void exit(){}

  // RenderInterface
  void render(ACG::GLState* _glState, Viewer::ViewerProperties& _properties);
  QString rendererName() {return QString("Alpha_Version_DepthPeeling");}
  void supportedDrawModes(ACG::SceneGraph::DrawModes::DrawMode& _mode) {_mode = ACG::SceneGraph::DrawModes::DEFAULT;}

  QString checkOpenGL();



private:

102 103 104 105 106 107 108 109

  /// peel the scene from front to back, one layer per pass
  void renderFrontPeeling(ACG::GLState* _glState, Viewer::ViewerProperties& _properties);

  /// peel the scene with dual depth peeling, two layers per pass
  void renderDualPeeling(ACG::GLState* _glState, Viewer::ViewerProperties& _properties);


Jan Möbius's avatar
Jan Möbius committed
110 111 112
  // single layer depth peeling
  struct PeelLayer
  {
113
    /// target framebuffer for colorTex and depthBuf
Jan Möbius's avatar
Jan Möbius committed
114 115 116 117
    GLuint fbo;

    /// color rendertarget
    GLuint colorTex;
118 119 120 121
    /// hardware depth buffer
    GLuint depthBuf;
    /// depth-buffer rendertarget
    GLuint depthTex; // encountered gpu-model specific problems when reading from depthBuf directly
Jan Möbius's avatar
Jan Möbius committed
122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139
  };

  /// blends one depth-layer into the current scene target
  GLSL::Program* peelBlend_;

  /// final copy into back-buffer
  GLSL::Program* peelFinal_;

  /** 
  Copy depth-texture of first layer into hardware z-buffer.
  This is needed for post-processing or renderobjects with low priority.
  */
  GLSL::Program* peelDepthCopy_;

  /// occlusion query determining end of peeling (last layer)
  GLuint peelQueryID_;


140 141 142 143 144
  /// dual depth peeling shaders
  GLSL::Program* peelBlendDual_;
  GLSL::Program* peelFinalDual_;


Jan Möbius's avatar
Jan Möbius committed
145 146 147 148 149
  /// Collection of framebuffers for each viewport
  struct ViewerResources
  {
    ViewerResources();

150 151 152
    // resize textures
    void resize(bool _dualPeeling, unsigned int _width, unsigned int _height);

Jan Möbius's avatar
Jan Möbius committed
153 154 155 156 157 158 159 160 161 162 163 164 165 166
    /// viewer window width
    unsigned int glWidth_;

    /// viewer window height
    unsigned int glHeight_;


    // depth peeling textures

    /// ping pong between two consecutive layers
    PeelLayer peelTargets_[2];

    GLuint peelBlendTex_;
    GLuint peelBlendFbo_;
167 168 169 170 171 172 173 174 175



    // dual depth peeling textures
    //  ping-pong buffer for (depth, front, back) targets
    GLuint dualDepthTex_[2]; // float2: (-minDepth, maxDepth)
    GLuint dualFrontTex_[2]; // rgba: color of front-peeled layer
    GLuint dualBackTex_[2];  // rgba: color of back-peeled layer
    GLuint dualBlendTex_;    // rgb:  color accumulation buffer
176 177

    ACG::FBO* dualFbo_; // targets: {depth0, front0, back0,  depth1, front1, back1,  blend}
Jan Möbius's avatar
Jan Möbius committed
178 179 180 181 182
  };

  /// Allocate framebuffers and load shaders for depth-peeling.
  void initDepthPeeling();

183 184 185
  /// Allocate framebuffers and load shaders for dual-depth-peeling.
  void initDualDepthPeeling();

Jan Möbius's avatar
Jan Möbius committed
186 187 188 189 190
  /**
  * Stores framebuffer resources for each viewport.
  * Mapping: viewerID -> ViewerResources
  */
  std::map<int, ViewerResources> viewerRes_;
191 192 193 194 195 196 197 198




  // debug functions
//   GLSL::Program* dbgProg_;
// 
//   void dbgDrawTex(GLuint _texID);
Jan Möbius's avatar
Jan Möbius committed
199
};