/
vtkOpenGLGPUMultiVolumeRayCastMapper.cxx
executable file
·7570 lines (6718 loc) · 244 KB
/
vtkOpenGLGPUMultiVolumeRayCastMapper.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkOpenGLGPUMultiVolumeRayCastMapper.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
Modified by: Carlos Falcón cfalcon@ctim.es
Karl Krissian karl@ctim.es
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.
=========================================================================*/
#include "vtkOpenGLGPUMultiVolumeRayCastMapper.h"
#include "vtkObjectFactory.h"
#include "vtkVolume.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkCamera.h"
#include "vtkMatrix4x4.h"
#include "vtkTransform.h"
#include "vtkImageData.h"
#include "vtkTimerLog.h"
#include "vtkVolumeProperty.h"
#include "vtkColorTransferFunction.h"
#include "vtkPiecewiseFunction.h"
#include "vtkOpenGLExtensionManager.h"
#include "vtkgl.h"
#ifndef VTK_IMPLEMENT_MESA_CXX
# include "vtkOpenGL.h"
#endif
#include <math.h>
#include <vtkstd/string>
#include <vtkstd/map>
#include <vtkstd/vector>
#include <assert.h>
#include "vtkClipDataSet.h"
#include "vtkCellArray.h"
#include "vtkDoubleArray.h"
#include "vtkFloatArray.h"
#include "vtkGeometryFilter.h"
#include "vtkMath.h"
#include "vtkPlane.h"
#include "vtkPlaneCollection.h"
#include "vtkPlanes.h"
#include "vtkPolyData.h"
#include "vtkPointData.h"
#include "vtkCellData.h"
#include "vtkPoints.h"
#include "vtkTriangle.h"
#include "vtkUnsignedCharArray.h"
#include "vtkUnsignedShortArray.h"
#include "vtkUnsignedIntArray.h"
#include "vtkUnstructuredGrid.h"
#include "vtkVoxel.h"
#include "vtkClipConvexPolyData.h"
#include "vtkClipPolyData.h"
#include "vtkDensifyPolyData.h"
#include "vtkImageResample.h"
#include <sstream>
#include <stdlib.h> // qsort()
#include "vtkDataSetTriangleFilter.h"
#include "vtkAbstractArray.h" // required if compiled against VTK 5.0
#include "vtkTessellatedBoxSource.h"
#include "vtkCleanPolyData.h"
#include "vtkCommand.h" // for VolumeMapperRender{Start|End|Progress}Event
#include "vtkPerlinNoise.h"
#include <vtksys/ios/sstream>
#include "vtkStdString.h"
#include "vtkShaderProgram2.h"
#include "vtkShader2.h"
#include "vtkUniformVariables.h"
#include "vtkShader2Collection.h"
#include "vtkOpenGLRenderWindow.h"
#include <vtkSmartPointer.h>
// Uncomment the following line to debug Snow Leopard
//#define APPLE_SNOW_LEOPARD_BUG
//-----------------------------------------------------------------------------
//
//-----------------------------------------------------------------------------
class vtkUnsupportedRequiredExtensionsStringStream
{
public:
vtkstd::ostringstream Stream;
vtkUnsupportedRequiredExtensionsStringStream()
{
}
private:
// undefined copy constructor.
vtkUnsupportedRequiredExtensionsStringStream(const vtkUnsupportedRequiredExtensionsStringStream &other);
// undefined assignment operator.
vtkUnsupportedRequiredExtensionsStringStream &operator=(const vtkUnsupportedRequiredExtensionsStringStream &other);
};
class vtkMapDataArrayTextureId
{
public:
vtkstd::map<vtkImageData *,vtkKWScalarField *> Map;
vtkMapDataArrayTextureId()
{
}
private:
// undefined copy constructor.
vtkMapDataArrayTextureId(const vtkMapDataArrayTextureId &other);
// undefined assignment operator.
vtkMapDataArrayTextureId &operator=(const vtkMapDataArrayTextureId &other);
};
class vtkMapMaskTextureId
{
public:
vtkstd::map<vtkImageData *,vtkKWMask *> Map;
vtkMapMaskTextureId()
{
}
private:
// undefined copy constructor.
vtkMapMaskTextureId(const vtkMapMaskTextureId &other);
// undefined assignment operator.
vtkMapMaskTextureId &operator=(const vtkMapMaskTextureId &other);
};
//-----------------------------------------------------------------------------
// 2 volumes shaders
extern const char *vtkGPUMultiVolumeRayCastMapper_CompositeFS;
extern const char *vtkGPUMultiVolumeRayCastMapper_NoShadeFS;
extern const char *vtkGPUMultiVolumeRayCastMapper_ShadeFS;
extern const char *vtkGPUMultiVolumeRayCastMapper_OneComponentFS;
extern const char *vtkGPUMultiVolumeRayCastMapper_FourComponentsFS;
extern const char *vtkGPUVolumeRayCastMapper_CompositeFS;
extern const char *vtkGPUVolumeRayCastMapper_CompositeCroppingFS;
extern const char *vtkGPUVolumeRayCastMapper_CompositeNoCroppingFS;
extern const char *vtkGPUVolumeRayCastMapper_HeaderFS;
extern const char *vtkGPUVolumeRayCastMapper_MIPFS;
extern const char *vtkGPUVolumeRayCastMapper_MIPBinaryMaskFS;
extern const char *vtkGPUVolumeRayCastMapper_MIPFourDependentFS;
extern const char *vtkGPUVolumeRayCastMapper_MIPFourDependentCroppingFS;
extern const char *vtkGPUVolumeRayCastMapper_MIPFourDependentNoCroppingFS;
extern const char *vtkGPUVolumeRayCastMapper_MIPCroppingFS;
extern const char *vtkGPUVolumeRayCastMapper_MIPNoCroppingFS;
extern const char *vtkGPUVolumeRayCastMapper_ParallelProjectionFS;
extern const char *vtkGPUVolumeRayCastMapper_PerspectiveProjectionFS;
extern const char *vtkGPUVolumeRayCastMapper_ScaleBiasFS;
extern const char *vtkGPUVolumeRayCastMapper_MinIPFS;
extern const char *vtkGPUVolumeRayCastMapper_MinIPBinaryMaskFS;
extern const char *vtkGPUVolumeRayCastMapper_MinIPFourDependentFS;
extern const char *vtkGPUVolumeRayCastMapper_MinIPFourDependentCroppingFS;
extern const char *vtkGPUVolumeRayCastMapper_MinIPFourDependentNoCroppingFS;
extern const char *vtkGPUVolumeRayCastMapper_MinIPCroppingFS;
extern const char *vtkGPUVolumeRayCastMapper_MinIPNoCroppingFS;
extern const char *vtkGPUVolumeRayCastMapper_CompositeMaskFS;
extern const char *vtkGPUVolumeRayCastMapper_CompositeBinaryMaskFS;
extern const char *vtkGPUVolumeRayCastMapper_AdditiveFS;
extern const char *vtkGPUVolumeRayCastMapper_AdditiveCroppingFS;
extern const char *vtkGPUVolumeRayCastMapper_AdditiveNoCroppingFS;
enum
{
vtkOpenGLGPUMultiVolumeRayCastMapperProjectionNotInitialized=-1, // not init
vtkOpenGLGPUMultiVolumeRayCastMapperProjectionPerspective=0, // false
vtkOpenGLGPUMultiVolumeRayCastMapperProjectionParallel=1 // true
};
enum
{
vtkOpenGLGPUMultiVolumeRayCastMapperMethodNotInitialized,
vtkOpenGLGPUMultiVolumeRayCastMapperMethodMIP,
vtkOpenGLGPUMultiVolumeRayCastMapperMethodMIPBinaryMask,
vtkOpenGLGPUMultiVolumeRayCastMapperMethodMIPFourDependent,
vtkOpenGLGPUMultiVolumeRayCastMapperMethodComposite,
vtkOpenGLGPUMultiVolumeRayCastMapperMethodMinIP,
vtkOpenGLGPUMultiVolumeRayCastMapperMethodMinIPBinaryMask,
vtkOpenGLGPUMultiVolumeRayCastMapperMethodMinIPFourDependent,
vtkOpenGLGPUMultiVolumeRayCastMapperMethodCompositeMask,
vtkOpenGLGPUMultiVolumeRayCastMapperMethodCompositeBinaryMask,
vtkOpenGLGPUMultiVolumeRayCastMapperMethodAdditive
};
// component implementation
enum
{
vtkOpenGLGPUMultiVolumeRayCastMapperComponentNotInitialized=-1, // not init
vtkOpenGLGPUMultiVolumeRayCastMapperComponentOne=0, // false
vtkOpenGLGPUMultiVolumeRayCastMapperComponentFour=1, // true
vtkOpenGLGPUMultiVolumeRayCastMapperComponentNotUsed=2 // when not composite
};
// Shade implementation
enum
{
vtkOpenGLGPUMultiVolumeRayCastMapperShadeNotInitialized=-1, // not init
vtkOpenGLGPUMultiVolumeRayCastMapperShadeNo=0, // false
vtkOpenGLGPUMultiVolumeRayCastMapperShadeYes=1, // true
vtkOpenGLGPUMultiVolumeRayCastMapperShadeNotUsed=2 // when not composite
};
// Cropping implementation
enum
{
vtkOpenGLGPUMultiVolumeRayCastMapperCroppingNotInitialized,
vtkOpenGLGPUMultiVolumeRayCastMapperCompositeCropping,
vtkOpenGLGPUMultiVolumeRayCastMapperCompositeNoCropping,
vtkOpenGLGPUMultiVolumeRayCastMapperMIPCropping,
vtkOpenGLGPUMultiVolumeRayCastMapperMIPNoCropping,
vtkOpenGLGPUMultiVolumeRayCastMapperMIPFourDependentCropping,
vtkOpenGLGPUMultiVolumeRayCastMapperMIPFourDependentNoCropping,
vtkOpenGLGPUMultiVolumeRayCastMapperMinIPCropping,
vtkOpenGLGPUMultiVolumeRayCastMapperMinIPNoCropping,
vtkOpenGLGPUMultiVolumeRayCastMapperMinIPFourDependentCropping,
vtkOpenGLGPUMultiVolumeRayCastMapperMinIPFourDependentNoCropping,
vtkOpenGLGPUMultiVolumeRayCastMapperAdditiveCropping,
vtkOpenGLGPUMultiVolumeRayCastMapperAdditiveNoCropping,
};
enum
{
vtkOpenGLGPUMultiVolumeRayCastMapperTextureObjectDepthMap=0, // 2d texture
vtkOpenGLGPUMultiVolumeRayCastMapperTextureObjectFrameBufferLeftFront // 2d texture
};
const int vtkOpenGLGPUMultiVolumeRayCastMapperNumberOfTextureObjects=vtkOpenGLGPUMultiVolumeRayCastMapperTextureObjectFrameBufferLeftFront+2;
const int vtkOpenGLGPUMultiVolumeRayCastMapperOpacityTableSize=1024; //power of two
#ifndef VTK_IMPLEMENT_MESA_CXX
vtkStandardNewMacro(vtkOpenGLGPUMultiVolumeRayCastMapper);
#endif
//-----------------------------------------------------------------------------
//
//-----------------------------------------------------------------------------
class vtkOpacityTable
{
public:
vtkOpacityTable()
{
this->TextureId=0;
this->LastBlendMode=vtkVolumeMapper::MAXIMUM_INTENSITY_BLEND;
this->LastSampleDistance=1.0;
this->Table=0;
this->Loaded=false;
this->LastLinearInterpolation=false;
}
~vtkOpacityTable()
{
if(this->TextureId!=0)
{
glDeleteTextures(1,&this->TextureId);
this->TextureId=0;
}
if(this->Table!=0)
{
delete[] this->Table;
this->Table=0;
}
}
bool IsLoaded()
{
return this->Loaded;
}
void Bind()
{
assert("pre: uptodate" && this->Loaded);
glBindTexture(GL_TEXTURE_1D,this->TextureId);
}
// \pre the active texture is set to TEXTURE2
void Update(vtkPiecewiseFunction *scalarOpacity,
int blendMode,
double sampleDistance,
double range[2],
double unitDistance,
bool linearInterpolation)
{
assert("pre: scalarOpacity_exists" && scalarOpacity!=0);
bool needUpdate=false;
if(this->TextureId==0)
{
glGenTextures(1,&this->TextureId);
needUpdate=true;
}
glBindTexture(GL_TEXTURE_1D,this->TextureId);
if(needUpdate)
{
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S,
vtkgl::CLAMP_TO_EDGE);
}
if(scalarOpacity->GetMTime() > this->BuildTime ||
(this->LastBlendMode!=blendMode)
|| (blendMode==vtkVolumeMapper::COMPOSITE_BLEND &&
this->LastSampleDistance!=sampleDistance)
|| needUpdate || !this->Loaded)
{
this->Loaded=false;
if(this->Table==0)
{
this->Table=
new float[vtkOpenGLGPUMultiVolumeRayCastMapperOpacityTableSize];
}
scalarOpacity->GetTable(range[0],range[1],
vtkOpenGLGPUMultiVolumeRayCastMapperOpacityTableSize,
this->Table);
this->LastBlendMode=blendMode;
// Correct the opacity array for the spacing between the planes if we
// are using a composite blending operation
if(blendMode==vtkVolumeMapper::COMPOSITE_BLEND)
{
float *ptr=this->Table;
double factor=sampleDistance/unitDistance;
int i=0;
while(i<vtkOpenGLGPUMultiVolumeRayCastMapperOpacityTableSize)
{
if(*ptr>0.0001f)
{
*ptr=static_cast<float>(1.0-pow(1.0-static_cast<double>(*ptr),
factor));
}
++ptr;
++i;
}
this->LastSampleDistance=sampleDistance;
}
else if (blendMode==vtkVolumeMapper::ADDITIVE_BLEND)
{
float *ptr=this->Table;
double factor=sampleDistance/unitDistance;
int i=0;
while(i<vtkOpenGLGPUMultiVolumeRayCastMapperOpacityTableSize)
{
if(*ptr>0.0001f)
{
*ptr=static_cast<float>(static_cast<double>(*ptr)*factor);
}
++ptr;
++i;
}
this->LastSampleDistance=sampleDistance;
}
glTexImage1D(GL_TEXTURE_1D,0,GL_ALPHA16,
vtkOpenGLGPUMultiVolumeRayCastMapperOpacityTableSize,0,
GL_ALPHA,GL_FLOAT,this->Table);
vtkOpenGLGPUMultiVolumeRayCastMapper::PrintError("1d opacity texture is too large");
this->Loaded=true;
this->BuildTime.Modified();
}
needUpdate=needUpdate ||
this->LastLinearInterpolation!=linearInterpolation;
if(needUpdate)
{
this->LastLinearInterpolation=linearInterpolation;
GLint value;
if(linearInterpolation)
{
value=GL_LINEAR;
}
else
{
value=GL_NEAREST;
}
glTexParameteri(GL_TEXTURE_1D,GL_TEXTURE_MIN_FILTER,value);
glTexParameteri(GL_TEXTURE_1D,GL_TEXTURE_MAG_FILTER,value);
}
}
protected:
GLuint TextureId;
int LastBlendMode;
double LastSampleDistance;
vtkTimeStamp BuildTime;
float *Table;
bool Loaded;
bool LastLinearInterpolation;
};
//-----------------------------------------------------------------------------
//
//-----------------------------------------------------------------------------
class vtkOpacityTables
{
public:
vtkstd::vector<vtkOpacityTable> Vector;
vtkOpacityTables(size_t numberOfLevels)
: Vector(numberOfLevels)
{
}
private:
// undefined copy constructor.
vtkOpacityTables(const vtkOpacityTables &other);
// undefined assignment operator.
vtkOpacityTables &operator=(const vtkOpacityTables &other);
};
//-----------------------------------------------------------------------------
class vtkRGBTable
{
public:
vtkRGBTable()
{
this->TextureId=0;
this->Table=0;
this->Loaded=false;
this->LastLinearInterpolation=false;
}
~vtkRGBTable()
{
if(this->TextureId!=0)
{
glDeleteTextures(1,&this->TextureId);
this->TextureId=0;
}
if(this->Table!=0)
{
delete[] this->Table;
this->Table=0;
}
}
bool IsLoaded()
{
return this->Loaded;
}
void Bind()
{
assert("pre: uptodate" && this->Loaded);
glBindTexture(GL_TEXTURE_1D,this->TextureId);
}
// \pre the active texture is set properly. (default color,
// mask1, mask2,..)
void Update(vtkColorTransferFunction *scalarRGB,
double range[2],
bool linearInterpolation)
{
assert("pre: scalarRGB_exists" && scalarRGB!=0);
bool needUpdate=false;
if(this->TextureId==0)
{
glGenTextures(1,&this->TextureId);
needUpdate=true;
}
glBindTexture(GL_TEXTURE_1D,this->TextureId);
if(needUpdate)
{
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S,
vtkgl::CLAMP_TO_EDGE);
}
if(scalarRGB->GetMTime() > this->BuildTime
|| needUpdate || !this->Loaded)
{
this->Loaded=false;
if(this->Table==0)
{
this->Table=
new float[vtkOpenGLGPUMultiVolumeRayCastMapperOpacityTableSize*3];
}
scalarRGB->GetTable(range[0],range[1],
vtkOpenGLGPUMultiVolumeRayCastMapperOpacityTableSize,
this->Table);
glTexImage1D(GL_TEXTURE_1D,0,GL_RGB16,
vtkOpenGLGPUMultiVolumeRayCastMapperOpacityTableSize,0,
GL_RGB,GL_FLOAT,this->Table);
vtkOpenGLGPUMultiVolumeRayCastMapper::PrintError("1d RGB texture is too large");
this->Loaded=true;
this->BuildTime.Modified();
}
needUpdate=needUpdate ||
this->LastLinearInterpolation!=linearInterpolation;
if(needUpdate)
{
this->LastLinearInterpolation=linearInterpolation;
GLint value;
if(linearInterpolation)
{
value=GL_LINEAR;
}
else
{
value=GL_NEAREST;
}
glTexParameteri(GL_TEXTURE_1D,GL_TEXTURE_MIN_FILTER,value);
glTexParameteri(GL_TEXTURE_1D,GL_TEXTURE_MAG_FILTER,value);
}
}
protected:
GLuint TextureId;
vtkTimeStamp BuildTime;
float *Table;
bool Loaded;
bool LastLinearInterpolation;
};
//-----------------------------------------------------------------------------
//
//-----------------------------------------------------------------------------
class vtkKWScalarField
{
public:
vtkKWScalarField()
{
this->TextureId=0;
this->Loaded=false;
this->Supports_GL_ARB_texture_float=false;
this->LoadedTableRange[0]=0.0;
this->LoadedTableRange[1]=1.0;
this->LoadedExtent[0]=VTK_INT_MAX;
this->LoadedExtent[1]=VTK_INT_MIN;
this->LoadedExtent[2]=VTK_INT_MAX;
this->LoadedExtent[3]=VTK_INT_MIN;
this->LoadedExtent[4]=VTK_INT_MAX;
this->LoadedExtent[5]=VTK_INT_MIN;
}
~vtkKWScalarField()
{
if(this->TextureId!=0)
{
glDeleteTextures(1,&this->TextureId);
this->TextureId=0;
}
}
vtkTimeStamp GetBuildTime()
{
return this->BuildTime;
}
void Bind()
{
assert("pre: uptodate" && this->Loaded);
glBindTexture(vtkgl::TEXTURE_3D,this->TextureId);
}
void Update(vtkImageData *input,
int cellFlag,
int textureExtent[6],
int scalarMode,
int arrayAccessMode,
int arrayId,
const char *arrayName,
bool linearInterpolation,
double tableRange[2],
int maxMemoryInBytes)
{
bool needUpdate=false;
bool modified=false;
if(this->TextureId==0)
{
glGenTextures(1,&this->TextureId);
needUpdate=true;
}
glBindTexture(vtkgl::TEXTURE_3D,this->TextureId);
int obsolete=needUpdate || !this->Loaded
|| input->GetMTime()>this->BuildTime
;
if(!obsolete)
{
obsolete=cellFlag!=this->LoadedCellFlag;
int i=0;
while(!obsolete && i<6)
{
obsolete=obsolete || this->LoadedExtent[i]>textureExtent[i];
++i;
obsolete=obsolete || this->LoadedExtent[i]<textureExtent[i];
++i;
}
}
if(!obsolete)
{
obsolete=this->LoadedTableRange[0]!=tableRange[0] ||
this->LoadedTableRange[1]!=tableRange[1];
}
if(obsolete)
{
this->Loaded=false;
int dim[3];
input->GetDimensions(dim);
GLint internalFormat=0;
GLenum format=0;
GLenum type=0;
// shift then scale: y:=(x+shift)*scale
double shift=0.0;
double scale=1.0;
int needTypeConversion=0;
vtkDataArray *sliceArray=0;
vtkDataArray *scalars=
vtkAbstractMapper::GetScalars(input,scalarMode,arrayAccessMode,
arrayId,arrayName,
this->LoadedCellFlag);
// DONT USE GetScalarType() or GetNumberOfScalarComponents() on
// ImageData as it deals only with point data...
int scalarType=scalars->GetDataType();
if(scalars->GetNumberOfComponents()==4)
{
// this is RGBA, unsigned char only
internalFormat=GL_RGBA16;
format=GL_RGBA;
type=GL_UNSIGNED_BYTE;
}
else
{
// input->GetNumberOfScalarComponents()==1
switch(scalarType)
{
case VTK_FLOAT:
if(this->Supports_GL_ARB_texture_float)
{
internalFormat=vtkgl::INTENSITY16F_ARB;
}
else
{
internalFormat=GL_INTENSITY16;
}
format=GL_RED;
type=GL_FLOAT;
shift=-tableRange[0];
scale=1/(tableRange[1]-tableRange[0]);
break;
case VTK_UNSIGNED_CHAR:
internalFormat=GL_INTENSITY8;
format=GL_RED;
type=GL_UNSIGNED_BYTE;
shift=-tableRange[0]/VTK_UNSIGNED_CHAR_MAX;
scale=
VTK_UNSIGNED_CHAR_MAX/(tableRange[1]-tableRange[0]);
break;
case VTK_SIGNED_CHAR:
internalFormat=GL_INTENSITY8;
format=GL_RED;
type=GL_BYTE;
shift=-(2*tableRange[0]+1)/VTK_UNSIGNED_CHAR_MAX;
scale=VTK_SIGNED_CHAR_MAX/(tableRange[1]-tableRange[0]);
break;
case VTK_CHAR:
// not supported
assert("check: impossible case" && 0);
break;
case VTK_BIT:
// not supported
assert("check: impossible case" && 0);
break;
case VTK_ID_TYPE:
// not supported
assert("check: impossible case" && 0);
break;
case VTK_INT:
internalFormat=GL_INTENSITY16;
format=GL_RED;
type=GL_INT;
shift=-(2*tableRange[0]+1)/VTK_UNSIGNED_INT_MAX;
scale=VTK_INT_MAX/(tableRange[1]-tableRange[0]);
break;
case VTK_DOUBLE:
case VTK___INT64:
case VTK_LONG:
case VTK_LONG_LONG:
case VTK_UNSIGNED___INT64:
case VTK_UNSIGNED_LONG:
case VTK_UNSIGNED_LONG_LONG:
needTypeConversion=1; // to float
if(this->Supports_GL_ARB_texture_float)
{
internalFormat=vtkgl::INTENSITY16F_ARB;
}
else
{
internalFormat=GL_INTENSITY16;
}
format=GL_RED;
type=GL_FLOAT;
shift=-tableRange[0];
scale=1/(tableRange[1]-tableRange[0]);
sliceArray=vtkFloatArray::New();
break;
case VTK_SHORT:
internalFormat=GL_INTENSITY16;
format=GL_RED;
type=GL_SHORT;
shift=-(2*tableRange[0]+1)/VTK_UNSIGNED_SHORT_MAX;
scale=VTK_SHORT_MAX/(tableRange[1]-tableRange[0]);
break;
case VTK_STRING:
// not supported
assert("check: impossible case" && 0);
break;
case VTK_UNSIGNED_SHORT:
internalFormat=GL_INTENSITY16;
format=GL_RED;
type=GL_UNSIGNED_SHORT;
shift=-tableRange[0]/VTK_UNSIGNED_SHORT_MAX;
scale=
VTK_UNSIGNED_SHORT_MAX/(tableRange[1]-tableRange[0]);
break;
case VTK_UNSIGNED_INT:
internalFormat=GL_INTENSITY16;
format=GL_RED;
type=GL_UNSIGNED_INT;
shift=-tableRange[0]/VTK_UNSIGNED_INT_MAX;
scale=VTK_UNSIGNED_INT_MAX/(tableRange[1]-tableRange[0]);
break;
default:
assert("check: impossible case" && 0);
break;
}
}
// Enough memory?
int textureSize[3];
int i=0;
while(i<3)
{
textureSize[i]=textureExtent[2*i+1]-textureExtent[2*i]+1;
++i;
}
GLint width;
glGetIntegerv(vtkgl::MAX_3D_TEXTURE_SIZE,&width);
this->Loaded=textureSize[0]<=width && textureSize[1]<=width
&& textureSize[2]<=width;
if(this->Loaded)
{
// so far, so good. the texture size is theorically small enough
// for OpenGL
vtkgl::TexImage3D(vtkgl::PROXY_TEXTURE_3D,0,internalFormat,
textureSize[0],textureSize[1],textureSize[2],0,
format,type,0);
glGetTexLevelParameteriv(vtkgl::PROXY_TEXTURE_3D,0,GL_TEXTURE_WIDTH,
&width);
this->Loaded=width!=0;
if(this->Loaded)
{
// so far, so good but some cards always succeed with a proxy texture
// let's try to actually allocate..
vtkgl::TexImage3D(vtkgl::TEXTURE_3D,0,internalFormat,textureSize[0],
textureSize[1],textureSize[2],0,format,type,0);
GLenum errorCode=glGetError();
this->Loaded=errorCode!=GL_OUT_OF_MEMORY;
if(this->Loaded)
{
// so far, so good, actual allocation succeeded.
if(errorCode!=GL_NO_ERROR)
{
cout<<"after try to load the texture";
cout<<" ERROR (x"<<hex<<errorCode<<") "<<dec;
cout<<vtkOpenGLGPUMultiVolumeRayCastMapper::OpenGLErrorMessage(static_cast<unsigned int>(errorCode));
cout<<endl;
}
// so far, so good but some cards don't report allocation error
this->Loaded=textureSize[0]*textureSize[1]*
textureSize[2]*vtkAbstractArray::GetDataTypeSize(scalarType)*
scalars->GetNumberOfComponents()<=maxMemoryInBytes;
if(this->Loaded)
{
// OK, we consider the allocation above succeeded...
// If it actually didn't the only to fix it for the user
// is to decrease the value of this->MaxMemoryInBytes.
// enough memory! We can load the scalars!
double bias=shift*scale;
// we don't clamp to edge because for the computation of the
// gradient on the border we need some external value.
glTexParameterf(vtkgl::TEXTURE_3D,vtkgl::TEXTURE_WRAP_R,vtkgl::CLAMP_TO_EDGE);
glTexParameterf(vtkgl::TEXTURE_3D,GL_TEXTURE_WRAP_S,vtkgl::CLAMP_TO_EDGE);
glTexParameterf(vtkgl::TEXTURE_3D,GL_TEXTURE_WRAP_T,vtkgl::CLAMP_TO_EDGE);
GLfloat borderColor[4]={0.0,0.0,0.0,0.0};
glTexParameterfv(vtkgl::TEXTURE_3D,GL_TEXTURE_BORDER_COLOR, borderColor);
if(needTypeConversion)
{
// Convert and send to the GPU, z-slice by z-slice.
// Allocate memory on the GPU (NULL data pointer with the right
// dimensions)
// Here we are assuming that GL_ARB_texture_non_power_of_two is
// available
glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
// memory allocation is already done.
// Send the slices:
// allocate CPU memory for a slice.
sliceArray->SetNumberOfComponents(1); // FB TODO CHECK THAT
sliceArray->SetNumberOfTuples(textureSize[0]*textureSize[1]);
void *slicePtr=sliceArray->GetVoidPointer(0);
int k=0;
int kInc=(dim[0]-cellFlag)*(dim[1]-cellFlag);
int kOffset=(textureExtent[4]*(dim[1]-cellFlag)
+textureExtent[2])*(dim[0]-cellFlag)
+textureExtent[0];
while(k<textureSize[2])
{
int j=0;
int jOffset=0;
int jDestOffset=0;
while(j<textureSize[1])
{
i=0;
while(i<textureSize[0])
{
sliceArray->SetTuple1(jDestOffset+i,
(scalars->GetTuple1(kOffset+jOffset
+i)
+shift)*scale);
++i;
}
++j;
jOffset+=dim[0]-cellFlag;
jDestOffset+=textureSize[0];
}
// Here we are assuming that GL_ARB_texture_non_power_of_two is
// available
vtkgl::TexSubImage3D(vtkgl::TEXTURE_3D, 0,
0,0,k,
textureSize[0],textureSize[1],
1, // depth is 1, not 0!
format,type, slicePtr);
++k;
kOffset+=kInc;
}
sliceArray->Delete();
}
else
{
// One chunk of data to the GPU.
// It works for the whole volume or for a subvolume.
// Here we are assuming that GL_ARB_texture_non_power_of_two is
// available
// make sure any previous OpenGL call is executed and will not
// be disturbed by our PixelTransfer value
glFinish();
glPixelTransferf(GL_RED_SCALE,static_cast<GLfloat>(scale));
glPixelTransferf(GL_RED_BIAS,static_cast<GLfloat>(bias));
glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
if(!(textureExtent[1]-textureExtent[0]+cellFlag==dim[0]))
{
glPixelStorei(GL_UNPACK_ROW_LENGTH,dim[0]-cellFlag);
}
if(!(textureExtent[3]-textureExtent[2]+cellFlag==dim[1]))
{
glPixelStorei(vtkgl::UNPACK_IMAGE_HEIGHT_EXT,
dim[1]-cellFlag);
}
void *dataPtr=scalars->GetVoidPointer(
((textureExtent[4]*(dim[1]-cellFlag)+textureExtent[2])
*(dim[0]-cellFlag)+textureExtent[0])
*scalars->GetNumberOfComponents());
if(1) // !this->SupportsPixelBufferObjects)
{
vtkgl::TexImage3D(vtkgl::TEXTURE_3D, 0, internalFormat,
textureSize[0],textureSize[1],textureSize[2],
0,format,type,dataPtr);
}
else
{
GLuint pbo=0;
vtkgl::GenBuffers(1,&pbo);
vtkOpenGLGPUMultiVolumeRayCastMapper::PrintError("genbuffer");
vtkgl::BindBuffer(vtkgl::PIXEL_UNPACK_BUFFER,pbo);
vtkOpenGLGPUMultiVolumeRayCastMapper::PrintError("binbuffer");
vtkgl::GLsizeiptr texSize=
textureSize[0]*textureSize[1]*textureSize[2]*
vtkAbstractArray::GetDataTypeSize(scalarType)*
scalars->GetNumberOfComponents();
vtkgl::BufferData(vtkgl::PIXEL_UNPACK_BUFFER,texSize,dataPtr,
vtkgl::STREAM_DRAW);
vtkOpenGLGPUMultiVolumeRayCastMapper::PrintError("bufferdata");
vtkgl::TexImage3D(vtkgl::TEXTURE_3D, 0, internalFormat,
textureSize[0],textureSize[1],textureSize[2],
0,format,type,0);
vtkOpenGLGPUMultiVolumeRayCastMapper::PrintError("teximage3d");
vtkgl::BindBuffer(vtkgl::PIXEL_UNPACK_BUFFER,0);
vtkOpenGLGPUMultiVolumeRayCastMapper::PrintError("bindbuffer to 0");
vtkgl::DeleteBuffers(1,&pbo);
}
vtkOpenGLGPUMultiVolumeRayCastMapper::PrintError("3d texture is too large2");
// make sure TexImage3D is executed with our PixelTransfer mode
glFinish();
// Restore the default values.
glPixelStorei(GL_UNPACK_ROW_LENGTH,0);
glPixelStorei(vtkgl::UNPACK_IMAGE_HEIGHT_EXT,0);
glPixelTransferf(GL_RED_SCALE,1.0);
glPixelTransferf(GL_RED_BIAS,0.0);
}
this->LoadedCellFlag=cellFlag;
i=0;
while(i<6)
{
this->LoadedExtent[i]=textureExtent[i];
++i;
}
double spacing[3];
double origin[3];
input->GetSpacing(spacing);
input->GetOrigin(origin);
int swapBounds[3];
swapBounds[0]=(spacing[0]<0);
swapBounds[1]=(spacing[1]<0);
swapBounds[2]=(spacing[2]<0);
if(!this->LoadedCellFlag) // loaded extents represent points
{
// slabsPoints[i]=(slabsDataSet[i] - origin[i/2]) / spacing[i/2];
// in general, x=o+i*spacing.
// if spacing is positive min extent match the min of the
// bounding box
// and the max extent match the max of the bounding box
// if spacing is negative min extent match the max of the
// bounding box
// and the max extent match the min of the bounding box
// if spacing is negative, we may have to rethink the equation
// between real point and texture coordinate...
this->LoadedBounds[0]=origin[0]+
static_cast<double>(this->LoadedExtent[0+swapBounds[0]])*spacing[0];
this->LoadedBounds[2]=origin[1]+
static_cast<double>(this->LoadedExtent[2+swapBounds[1]])*spacing[1];
this->LoadedBounds[4]=origin[2]+
static_cast<double>(this->LoadedExtent[4+swapBounds[2]])*spacing[2];
this->LoadedBounds[1]=origin[0]+
static_cast<double>(this->LoadedExtent[1-swapBounds[0]])*spacing[0];
this->LoadedBounds[3]=origin[1]+
static_cast<double>(this->LoadedExtent[3-swapBounds[1]])*spacing[1];
this->LoadedBounds[5]=origin[2]+
static_cast<double>(this->LoadedExtent[5-swapBounds[2]])*spacing[2];
}
else // loaded extents represent cells
{
int wholeTextureExtent[6];
input->GetExtent(wholeTextureExtent);
i=1;
while(i<6)
{
wholeTextureExtent[i]--;
i+=2;
}
i=0;