vtkTextureObject.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkTextureObject.h
 
  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
 
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.
 
=========================================================================*/
#ifndef vtkTextureObject_h
#define vtkTextureObject_h
 
#include "vtkRenderingOpenGLModule.h" // For export macro
#include "vtkObject.h"
#include "vtkWeakPointer.h" // for render context
 
class vtkFloatArray;
class vtkTextureObject;
class vtkRenderWindow;
class vtkOpenGLRenderWindow;
class vtkOpenGLExtensionManager;
class vtkPixelBufferObject;
 
class VTKRENDERINGOPENGL_EXPORT vtkTextureObject : public vtkObject
{
public:
 
  //BTX
  // DepthTextureCompareFunction values.
  enum
  {
    Lequal=0, // r=R<=Dt ? 1.0 : 0.0
    Gequal, // r=R>=Dt ? 1.0 : 0.0
    Less, // r=R<D_t ? 1.0 : 0.0
    Greater, // r=R>Dt ? 1.0 : 0.0
    Equal, // r=R==Dt ? 1.0 : 0.0
    NotEqual, // r=R!=Dt ? 1.0 : 0.0
    AlwaysTrue, //  r=1.0 // WARNING "Always" is macro defined in X11/X.h...
    Never, // r=0.0
    NumberOfDepthTextureCompareFunctions
  };
 
  // DepthTextureMode values.
  enum
  {
    Luminance=0, // (R,G,B,A)=(r,r,r,1)
    Intensity, // (R,G,B,A)=(r,r,r,r)
    Alpha, // (R.G.B.A)=(0,0,0,r)
    NumberOfDepthTextureModes
  };
 
  // Wrap values.
  enum
  {
    Clamp=0,
    ClampToEdge,
    Repeat,
    ClampToBorder,
    MirroredRepeat,
    NumberOfWrapModes
  };
 
  // MinificationFilter values.
  enum
  {
    Nearest=0,
    Linear,
    NearestMipmapNearest,
    NearestMipmapLinear,
    LinearMipmapNearest,
    LinearMipmapLinear,
    NumberOfMinificationModes
  };
 
  // Internal depth format
  enum
  {
    Native=0, // will try to match with the depth buffer format.
    Fixed16,
    Fixed24,
    Fixed32,
    Float32,
    NumberOfDepthFormats
  };
 
  //ETX
 
  static vtkTextureObject* New();
  vtkTypeMacro(vtkTextureObject, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);
 
 
  void SetContext(vtkRenderWindow*);
  vtkRenderWindow* GetContext();
 
 
  vtkGetMacro(Width, unsigned int);
  vtkGetMacro(Height, unsigned int);
  vtkGetMacro(Depth, unsigned int);
  vtkGetMacro(Components, int);
  unsigned int GetTuples()
  { return this->Width*this->Height*this->Depth; }
 
  vtkGetMacro(NumberOfDimensions, int);
 
 
  vtkGetMacro(Target, unsigned int);
 
 
  vtkGetMacro(Handle, unsigned int);
 
 
  void Bind();
  void UnBind();
 
 
  void Activate(unsigned int texUnit);
  void Deactivate(unsigned int texUnit);
 
 
  bool IsBound();
 
 
  void SendParameters();
  vtkSetMacro(AutoParameters, int);
  vtkGetMacro(AutoParameters, int);
 
 
  bool Create1D(int numComps,
                vtkPixelBufferObject *pbo,
                bool shaderSupportsTextureInt);
 
 
  bool Create2D(unsigned int width, unsigned int height, int numComps,
                vtkPixelBufferObject *pbo,
                bool shaderSupportsTextureInt);
 
 
  bool CreateDepth(unsigned int width,
                   unsigned int height,
                   int internalFormat,
                   vtkPixelBufferObject *pbo);
 
 
  bool CreateDepthFromRaw(unsigned int width,
                          unsigned int height,
                          int internalFormat,
                          int rawType,
                          void *raw);
 
 
  bool AllocateDepth(unsigned int width,unsigned int height,
                     int internalFormat);
 
  bool Allocate1D(unsigned int width, int numComps,int vtkType);
 
 
  bool Allocate2D(unsigned int width,unsigned int height, int numComps,
                  int vtkType);
 
 
  bool Allocate3D(unsigned int width,unsigned int height,
                  unsigned int depth, int numComps,
                  int vtkType);
 
 
 
  bool Create3D(unsigned int width, unsigned int height, unsigned int depth,
                int numComps, vtkPixelBufferObject *pbo,
                bool shaderSupportsTextureInt);
 
 
 
  bool Create2D(unsigned int width, unsigned int height, int numComps,
                int vtktype,
                bool shaderSupportsTextureInt);
  bool Create3D(unsigned int width, unsigned int height, unsigned int depth,
                int numComps, int vtktype,
                bool shaderSupportsTextureInt);
 
  vtkPixelBufferObject* Download();
 
  int GetDataType();
 
  unsigned int GetInternalFormat(int vtktype, int numComps,
                                 bool shaderSupportsTextureInt);
  unsigned int GetFormat(int vtktype, int numComps,
                         bool shaderSupportsTextureInt);
 
 
  vtkSetMacro(RequireDepthBufferFloat, bool);
  vtkGetMacro(RequireDepthBufferFloat, bool);
  vtkGetMacro(SupportsDepthBufferFloat, bool);
 
 
  vtkSetMacro(RequireTextureFloat,bool);
  vtkGetMacro(RequireTextureFloat,bool);
  vtkGetMacro(SupportsTextureFloat,bool);
 
 
  vtkSetMacro(RequireTextureInteger,bool);
  vtkGetMacro(RequireTextureInteger,bool);
  vtkGetMacro(SupportsTextureInteger,bool);
 
 
  vtkGetMacro(WrapS,int);
  vtkSetMacro(WrapS,int);
 
 
  vtkGetMacro(WrapT,int);
  vtkSetMacro(WrapT,int);
 
 
  vtkGetMacro(WrapR,int);
  vtkSetMacro(WrapR,int);
 
 
  vtkGetMacro(MinificationFilter,int);
  vtkSetMacro(MinificationFilter,int);
 
 
  vtkGetMacro(MagnificationFilter,int);
  vtkSetMacro(MagnificationFilter,int);
 
 
  void SetLinearMagnification(bool val)
  { this->SetMagnificationFilter(val?Linear:Nearest); }
 
  bool GetLinearMagnification()
  { return this->MagnificationFilter==Linear; }
 
 
  vtkSetVector4Macro(BorderColor,float);
  vtkGetVector4Macro(BorderColor,float);
 
 
  vtkSetMacro(Priority,float);
  vtkGetMacro(Priority,float);
 
 
  vtkSetMacro(MinLOD,float);
  vtkGetMacro(MinLOD,float);
 
 
  vtkSetMacro(MaxLOD,float);
  vtkGetMacro(MaxLOD,float);
 
 
  vtkSetMacro(BaseLevel,int);
  vtkGetMacro(BaseLevel,int);
 
 
  vtkSetMacro(MaxLevel,int);
  vtkGetMacro(MaxLevel,int);
 
 
  vtkGetMacro(DepthTextureCompare,bool);
  vtkSetMacro(DepthTextureCompare,bool);
 
 
  vtkGetMacro(DepthTextureCompareFunction,int);
  vtkSetMacro(DepthTextureCompareFunction,int);
 
 
  vtkGetMacro(DepthTextureMode,int);
  vtkSetMacro(DepthTextureMode,int);
 
 
  vtkGetMacro(GenerateMipmap,bool);
  vtkSetMacro(GenerateMipmap,bool);
 
 
  static bool IsSupported(
        vtkRenderWindow* renWin,
        bool requireTexFloat,
        bool requireDepthFloat,
        bool requireTexInt);
 
 
  static bool IsSupported(vtkRenderWindow* renWin)
    { return vtkTextureObject::IsSupported(renWin, false, false, false); }
 
 
  void CopyToFrameBuffer(int srcXmin,
                         int srcYmin,
                         int srcXmax,
                         int srcYmax,
                         int dstXmin,
                         int dstYmin,
                         int width,
                         int height);
 
 
 
  void CopyFromFrameBuffer(int srcXmin,
                           int srcYmin,
                           int dstXmin,
                           int dstYmin,
                           int width,
                           int height);
 
 
 
//BTX
protected:
  vtkTextureObject();
  ~vtkTextureObject();
 
  bool LoadRequiredExtensions(vtkRenderWindow *renWin);
 
  void CreateTexture();
 
  void DestroyTexture();
 
  int NumberOfDimensions;
  unsigned int Width;
  unsigned int Height;
  unsigned int Depth;
 
  unsigned int Target; // GLenum
  unsigned int Format; // GLenum
  unsigned int Type; // GLenum
  int Components;
 
  vtkWeakPointer<vtkRenderWindow> Context;
  unsigned int Handle;
  bool RequireTextureInteger;
  bool SupportsTextureInteger;
  bool RequireTextureFloat;
  bool SupportsTextureFloat;
  bool RequireDepthBufferFloat;
  bool SupportsDepthBufferFloat;
 
  int WrapS;
  int WrapT;
  int WrapR;
  int MinificationFilter;
  int MagnificationFilter;
  bool LinearMagnification;
  float BorderColor[4];
 
  float Priority;
  float MinLOD;
  float MaxLOD;
  int BaseLevel;
  int MaxLevel;
 
 
  bool DepthTextureCompare;
  int DepthTextureCompareFunction;
  int DepthTextureMode;
 
  bool GenerateMipmap;
 
  int AutoParameters;
  vtkTimeStamp SendParametersTime;
 
private:
  vtkTextureObject(const vtkTextureObject&); // Not implemented.
  void operator=(const vtkTextureObject&); // Not implemented.
//ETX
};
 
#endif