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vtkDataTransferHelper.cxx
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vtkDataTransferHelper.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkDataTransferHelper.cxx
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.
=========================================================================*/
#include "vtkDataTransferHelper.h"
#include "vtkDataArray.h"
#include "vtkImageData.h"
#include "vtkObjectFactory.h"
#include "vtkOpenGLRenderWindow.h"
#include "vtkPixelBufferObject.h"
#include "vtkSmartPointer.h"
#include "vtkStructuredData.h"
#include "vtkTextureObject.h"
#include <cassert>
static void vtkGetDimensions(int extents[6], int dims[3])
{
dims[0] = extents[1] - extents[0] + 1;
dims[1] = extents[3] - extents[2] + 1;
dims[2] = extents[5] - extents[4] + 1;
}
vtkStandardNewMacro(vtkDataTransferHelper);
vtkCxxSetObjectMacro(vtkDataTransferHelper, Texture, vtkTextureObject);
vtkCxxSetObjectMacro(vtkDataTransferHelper, Array, vtkDataArray);
//------------------------------------------------------------------------------
vtkDataTransferHelper::vtkDataTransferHelper()
{
this->Texture = nullptr;
this->Context = nullptr;
this->Array = nullptr;
this->ShaderSupportsTextureInt = false;
this->GPUExtent[0] = this->GPUExtent[1] = this->GPUExtent[2] = this->GPUExtent[3] =
this->GPUExtent[4] = this->GPUExtent[5] = 0;
this->CPUExtent[0] = this->CPUExtent[1] = this->CPUExtent[2] = this->CPUExtent[3] =
this->CPUExtent[4] = this->CPUExtent[5] = 0;
// invalid extent.
this->TextureExtent[0] = 0;
this->TextureExtent[1] = -1;
this->TextureExtent[2] = 0;
this->TextureExtent[3] = -1;
this->TextureExtent[4] = 0;
this->TextureExtent[5] = -1;
this->MinTextureDimension = 1;
}
//------------------------------------------------------------------------------
vtkDataTransferHelper::~vtkDataTransferHelper()
{
this->SetTexture(nullptr);
this->SetArray(nullptr);
this->SetContext(nullptr);
}
//------------------------------------------------------------------------------
// Description:
// Tells if the given extent (6 int) is valid. True if min
// extent<=max extent.
// \pre extent_exists: extent!=0
bool vtkDataTransferHelper::GetExtentIsValid(int* extent)
{
assert("pre extent_exists:" && extent != nullptr);
return extent[0] <= extent[1] && extent[2] <= extent[3] && extent[4] <= extent[5];
}
//------------------------------------------------------------------------------
// Description:
// Tells if CPUExtent is valid. True if min extent<=max extent.
bool vtkDataTransferHelper::GetCPUExtentIsValid()
{
return this->GetExtentIsValid(this->CPUExtent);
}
//------------------------------------------------------------------------------
// Description:
// Tells if GPUExtent is valid. True if min extent<=max extent.
bool vtkDataTransferHelper::GetGPUExtentIsValid()
{
return this->GetExtentIsValid(this->GPUExtent);
}
//------------------------------------------------------------------------------
// Description:
// Tells if TextureExtent is valid. True if min extent<=max extent.
bool vtkDataTransferHelper::GetTextureExtentIsValid()
{
return this->GetExtentIsValid(this->TextureExtent);
}
//------------------------------------------------------------------------------
// Description:
// Returns if the context supports the required extensions.
bool vtkDataTransferHelper::IsSupported(vtkRenderWindow* renWin)
{
vtkOpenGLRenderWindow* rw = vtkOpenGLRenderWindow::SafeDownCast(renWin);
return (vtkPixelBufferObject::IsSupported(renWin) && vtkTextureObject::IsSupported(rw));
}
//------------------------------------------------------------------------------
vtkRenderWindow* vtkDataTransferHelper::GetContext()
{
return this->Context;
}
//------------------------------------------------------------------------------
void vtkDataTransferHelper::SetContext(vtkRenderWindow* renWin)
{
if (renWin == this->Context)
{
return;
}
if (this->Texture && this->Texture->GetContext() != renWin)
{
this->SetTexture(nullptr);
}
vtkOpenGLRenderWindow* openGLRenWin = vtkOpenGLRenderWindow::SafeDownCast(renWin);
this->Context = openGLRenWin;
// release the old PBO.
this->PBO = nullptr;
this->Modified();
}
//------------------------------------------------------------------------------
// Description:
// Upload GPUExtent from CPU vtkDataArray to GPU texture.
// It is possible to send a subset of the components or to specify and
// order of components or both. If components=0, componentList is ignored
// and all components are passed, a texture cannot have more than 4
// components.
// \pre array_exists: array!=0
// \pre array_not_empty: array->GetNumberOfTuples()>0
// \pre valid_cpu_extent: this->GetCPUExtentIsValid()
// \pre valid_cpu_extent_size:
// (CPUExtent[1]-CPUExtent[0]+1)*(CPUExtent[3]-CPUExtent[2]+1)*(CPUExtent[5]-CPUExtent[4]+1)==array->GetNumberOfTuples()
// \pre valid_gpu_extent: this->GetGPUExtentIsValid()
// \pre gpu_extent_in_cpu_extent: CPUExtent[0]<=GPUExtent[0] && GPUExtent[1]<=CPUExtent[1] &&
// CPUExtent[2]<=GPUExtent[2] && GPUExtent[3]<=CPUExtent[3] && CPUExtent[4]<=GPUExtent[4] &&
// GPUExtent[5]<=CPUExtent[5] \pre gpu_texture_size: !this->GetTextureExtentIsValid() ||
// (GPUExtent[1]-GPUExtent[0]+1)*(GPUExtent[3]-GPUExtent[2]+1)*(GPUExtent[5]-GPUExtent[4]+1)==(TextureExtent[1]-TextureExtent[0]+1)*(TextureExtent[3]-TextureExtent[2]+1)*(TextureExtent[5]-TextureExtent[4]+1)
// \pre valid_components: (components==0 && componentList==0 && array->GetNumberOfComponents()<=4)
// || (components>=1 && components<=array->GetNumberOfComponents() && components<=4 &&
// componentList!=0)
bool vtkDataTransferHelper::Upload(int components, int* componentList)
{
assert("pre: array_exists" && this->Array != nullptr);
assert("pre: array_not_empty" && this->Array->GetNumberOfTuples() > 0);
assert("pre: valid_cpu_extent" && this->GetCPUExtentIsValid());
assert("pre: valid_cpu_extent_size" &&
((this->CPUExtent[1] - this->CPUExtent[0] + 1) * (this->CPUExtent[3] - this->CPUExtent[2] + 1) *
(this->CPUExtent[5] - this->CPUExtent[4] + 1) ==
this->Array->GetNumberOfTuples()));
assert("pre: valid_gpu_extent" && this->GetGPUExtentIsValid());
assert("pre: gpu_extent_in_cpu_extent" &&
(this->CPUExtent[0] <= this->GPUExtent[0] && this->GPUExtent[1] <= this->CPUExtent[1] &&
this->CPUExtent[2] <= this->GPUExtent[2] && this->GPUExtent[3] <= this->CPUExtent[3] &&
this->CPUExtent[4] <= this->GPUExtent[4] && this->GPUExtent[5] <= this->CPUExtent[5]));
assert("pre: gpu_texture_size" &&
(!this->GetTextureExtentIsValid() ||
((this->GPUExtent[1] - this->GPUExtent[0] + 1) *
(this->GPUExtent[3] - this->GPUExtent[2] + 1) *
(this->GPUExtent[5] - this->GPUExtent[4] + 1) ==
(this->TextureExtent[1] - this->TextureExtent[0] + 1) *
(this->TextureExtent[3] - this->TextureExtent[2] + 1) *
(this->TextureExtent[5] - this->TextureExtent[4] + 1))));
assert("pre: valid_components" &&
((components == 0 && componentList == nullptr && this->Array->GetNumberOfComponents() <= 4) ||
(components >= 1 && components <= this->Array->GetNumberOfComponents() && components <= 4 &&
componentList != nullptr)));
if (!this->Context)
{
vtkErrorMacro("Cannot upload to GPU without context.");
return false;
}
int cpudims[3];
int gpudims[3];
int texturedims[3];
vtkGetDimensions(this->CPUExtent, cpudims);
vtkGetDimensions(this->GPUExtent, gpudims);
vtkDebugMacro(<< "CPUDims: " << cpudims[0] << ", " << cpudims[1] << ", " << cpudims[2] << endl);
vtkDebugMacro(<< "GPUDims: " << gpudims[0] << ", " << gpudims[1] << ", " << gpudims[2] << endl);
if (!this->GetTextureExtentIsValid())
{
// use GPU extent.
texturedims[0] = gpudims[0];
texturedims[1] = gpudims[1];
texturedims[2] = gpudims[2];
}
else
{
vtkGetDimensions(this->TextureExtent, texturedims);
}
int numComps = this->Array->GetNumberOfComponents();
// * Upload data to vtkPixelBufferObject.
vtkSmartPointer<vtkPixelBufferObject> pbo = this->GetPBO();
// We need to get the ContinuousIncrements as computed by the vtkImageData.
// For that we create a dummy image data object,
vtkSmartPointer<vtkImageData> tempImg = vtkSmartPointer<vtkImageData>::New();
tempImg->SetDimensions(1, 1, 1);
// scalars are needed for ComputeIncrements().
tempImg->AllocateScalars(VTK_DOUBLE, 1);
tempImg->SetExtent(this->CPUExtent);
vtkIdType continuousInc[3];
tempImg->GetContinuousIncrements(
this->GPUExtent, continuousInc[0], continuousInc[1], continuousInc[2]);
tempImg = nullptr;
int pt[3] = { this->GPUExtent[0] - this->CPUExtent[0], this->GPUExtent[2] - this->CPUExtent[2],
this->GPUExtent[4] - this->CPUExtent[4] };
vtkIdType ptId = vtkStructuredData::ComputePointId(cpudims, pt);
if (!pbo->Upload3D(this->Array->GetDataType(), this->Array->GetVoidPointer(ptId * numComps),
reinterpret_cast<unsigned int*>(gpudims), numComps, continuousInc, components,
componentList))
{
vtkErrorMacro("Failed to load data to pixel buffer.");
return false;
}
// * Now, we need to create a Texture for the uploaded data.
if (!this->Texture)
{
vtkTextureObject* tex = vtkTextureObject::New();
tex->SetContext(vtkOpenGLRenderWindow::SafeDownCast(this->Context));
this->SetTexture(tex);
tex->Delete();
}
int tempdims[3] = { 0, 0, 0 };
int dataDescription = vtkStructuredData::SetDimensions(texturedims, tempdims);
int dimension = vtkStructuredData::GetDataDimension(dataDescription);
bool uploaded = false;
switch (dimension)
{
case 0: // 1 pixel image
case 1:
{
unsigned int length = 0;
switch (dataDescription)
{
case VTK_SINGLE_POINT:
length = 1;
break;
case VTK_X_LINE:
length = static_cast<unsigned int>(texturedims[0]);
break;
case VTK_Y_LINE:
length = static_cast<unsigned int>(texturedims[1]);
break;
case VTK_Z_LINE:
length = static_cast<unsigned int>(texturedims[2]);
break;
}
switch (this->MinTextureDimension)
{
case 1:
uploaded = this->Texture->Create1D(numComps, pbo, this->ShaderSupportsTextureInt);
break;
case 2:
uploaded =
this->Texture->Create2D(length, 1, numComps, pbo, this->ShaderSupportsTextureInt);
break;
case 3:
uploaded =
this->Texture->Create3D(length, 1, 1, numComps, pbo, this->ShaderSupportsTextureInt);
break;
default:
assert("check: impossible case" && 0);
break;
}
}
break;
case 2:
{
unsigned int width = 0;
unsigned int height = 0;
#if 0
switch (dataDescription)
{
case VTK_XY_PLANE:
width = gpudims[0];
height = gpudims[1];
break;
case VTK_YZ_PLANE:
width = gpudims[1];
height = gpudims[2];
break;
case VTK_XZ_PLANE:
width = gpudims[0];
height = gpudims[2];
break;
}
#else
#if 1
switch (dataDescription)
{
case VTK_XY_PLANE:
width = static_cast<unsigned int>(texturedims[0]);
height = static_cast<unsigned int>(texturedims[1]);
break;
case VTK_YZ_PLANE:
width = static_cast<unsigned int>(texturedims[1]);
height = static_cast<unsigned int>(texturedims[2]);
break;
case VTK_XZ_PLANE:
width = static_cast<unsigned int>(texturedims[0]);
height = static_cast<unsigned int>(texturedims[2]);
break;
}
#else
width = texturedims[0];
height = texturedims[1];
#endif
#endif
switch (this->MinTextureDimension)
{
case 1:
case 2:
uploaded =
this->Texture->Create2D(width, height, numComps, pbo, this->ShaderSupportsTextureInt);
break;
case 3:
uploaded = this->Texture->Create3D(
width, height, 1, numComps, pbo, this->ShaderSupportsTextureInt);
break;
default:
assert("check: impossible case" && 0);
break;
}
}
break;
case 3:
uploaded = this->Texture->Create3D(static_cast<unsigned int>(texturedims[0]),
static_cast<unsigned int>(texturedims[1]), static_cast<unsigned int>(texturedims[2]),
numComps, pbo, this->ShaderSupportsTextureInt);
break;
}
pbo->ReleaseMemory();
if (!uploaded)
{
vtkErrorMacro("Failed to upload data to texture.");
return false;
}
return true;
}
//------------------------------------------------------------------------------
// Description:
// new comment:
// Download GPUExtent from GPU texture to CPU vtkDataArray.
// If Array is not provided, it will be created with the size of CPUExtent.
// But only the tuples covered by GPUExtent will be download. In this case,
// if GPUExtent does not cover all GPUExtent, some of the vtkDataArray will
// be uninitialized.
// Reminder: A=>B <=> !A||B
// \pre texture_exists: texture!=0
// \pre array_not_empty: array==0 || array->GetNumberOfTuples()>0
// \pre valid_cpu_extent: this->GetCPUExtentIsValid()
// \pre valid_cpu_extent_size: array==0 ||
// (CPUExtent[1]-CPUExtent[0]+1)*(CPUExtent[3]-CPUExtent[2]+1)*(CPUExtent[5]-CPUExtent[4]+1)==array->GetNumberOfTuples()
// \pre valid_gpu_extent: this->GetGPUExtentIsValid()
// \pre gpu_extent_in_cpu_extent: CPUExtent[0]<=GPUExtent[0] && GPUExtent[1]<=CPUExtent[1] &&
// CPUExtent[2]<=GPUExtent[2] && GPUExtent[3]<=CPUExtent[3] && CPUExtent[4]<=GPUExtent[4] &&
// GPUExtent[5]<=CPUExtent[5] \pre gpu_texture_size: !this->GetTextureExtentIsValid() ||
// (GPUExtent[1]-GPUExtent[0]+1)*(GPUExtent[3]-GPUExtent[2]+1)*(GPUExtent[5]-GPUExtent[4]+1)==(TextureExtent[1]-TextureExtent[0]+1)*(TextureExtent[3]-TextureExtent[2]+1)*(TextureExtent[5]-TextureExtent[4]+1)
// \pre valid_components: array==0 || array->GetNumberOfComponents()<=4
// \pre components_match: array==0 || (texture->GetComponents()==array->GetNumberOfComponents())
bool vtkDataTransferHelper::Download()
{
return (this->DownloadAsync1() && this->DownloadAsync2());
}
//------------------------------------------------------------------------------
bool vtkDataTransferHelper::DownloadAsync1()
{
if (!this->Context)
{
vtkErrorMacro("Cannot download from GPU without context.");
return false;
}
assert("pre: texture_exists" && this->Texture != nullptr);
assert(
"pre: array_not_empty" && (this->Array == nullptr || this->Array->GetNumberOfTuples() > 0));
assert("pre: valid_cpu_extent" && this->GetCPUExtentIsValid());
assert("pre: valid_cpu_extent_size" &&
(this->Array == nullptr ||
((this->CPUExtent[1] - this->CPUExtent[0] + 1) *
(this->CPUExtent[3] - this->CPUExtent[2] + 1) *
(this->CPUExtent[5] - this->CPUExtent[4] + 1) ==
this->Array->GetNumberOfTuples())));
assert("pre: valid_gpu_extent" && this->GetGPUExtentIsValid());
assert("pre: gpu_extent_in_cpu_extent" &&
(this->CPUExtent[0] <= this->GPUExtent[0] && this->GPUExtent[1] <= this->CPUExtent[1] &&
this->CPUExtent[2] <= this->GPUExtent[2] && this->GPUExtent[3] <= this->CPUExtent[3] &&
this->CPUExtent[4] <= this->GPUExtent[4] && this->GPUExtent[5] <= this->CPUExtent[5]));
assert("pre: gpu_texture_size" &&
(!this->GetTextureExtentIsValid() ||
((this->GPUExtent[1] - this->GPUExtent[0] + 1) *
(this->GPUExtent[3] - this->GPUExtent[2] + 1) *
(this->GPUExtent[5] - this->GPUExtent[4] + 1) ==
(this->TextureExtent[1] - this->TextureExtent[0] + 1) *
(this->TextureExtent[3] - this->TextureExtent[2] + 1) *
(this->TextureExtent[5] - this->TextureExtent[4] + 1))));
assert("pre: valid_components" &&
(this->Array == nullptr || this->Array->GetNumberOfComponents() <= 4));
assert("pre: components_match" &&
(this->Array == nullptr ||
(this->Texture->GetComponents() == this->Array->GetNumberOfComponents())));
int numComps = this->Texture->GetComponents();
int cpudims[3];
int gpudims[3];
vtkGetDimensions(this->CPUExtent, cpudims);
vtkGetDimensions(this->GPUExtent, gpudims);
// * Download data to vtkPixelBufferObject.
vtkSmartPointer<vtkPixelBufferObject> pbo;
pbo.TakeReference(this->Texture->Download());
if (!pbo)
{
vtkErrorMacro("Failed to download texture to a Pixel Buffer object.");
return false;
}
if (pbo->GetSize() < static_cast<unsigned int>(gpudims[0] * gpudims[1] * gpudims[2] * numComps))
{
vtkErrorMacro("GPU data size is smaller than GPUExtent.");
return false;
}
this->AsyncDownloadPBO = pbo;
return true;
}
//------------------------------------------------------------------------------
bool vtkDataTransferHelper::DownloadAsync2()
{
if (!this->AsyncDownloadPBO)
{
vtkErrorMacro("DownloadAsync1() must be called successfully "
"before calling DownloadAsync2().");
return false;
}
int numComps = this->Texture->GetComponents();
int cpudims[3];
int gpudims[3];
vtkGetDimensions(this->CPUExtent, cpudims);
vtkGetDimensions(this->GPUExtent, gpudims);
if (!this->Array)
{
vtkDataArray* array = vtkDataArray::CreateDataArray(this->Texture->GetVTKDataType());
this->SetArray(array);
array->Delete();
this->Array->SetNumberOfComponents(numComps);
this->Array->SetNumberOfTuples(cpudims[0] * cpudims[1] * cpudims[2]);
}
// We need to get the ContinuousIncrements as computed by the vtkImageData.
// For that we create a dummy image data object,
vtkSmartPointer<vtkImageData> tempImg = vtkSmartPointer<vtkImageData>::New();
tempImg->SetDimensions(1, 1, 1);
// scalars are needed for ComputeIncrements().
tempImg->AllocateScalars(VTK_DOUBLE, 1);
tempImg->SetExtent(this->CPUExtent);
vtkIdType continuousInc[3];
tempImg->GetContinuousIncrements(
this->GPUExtent, continuousInc[0], continuousInc[1], continuousInc[2]);
tempImg = nullptr;
int pt[3] = { this->GPUExtent[0] - this->CPUExtent[0], this->GPUExtent[2] - this->CPUExtent[2],
this->GPUExtent[4] - this->CPUExtent[4] };
vtkIdType ptId = vtkStructuredData::ComputePointId(cpudims, pt);
bool reply = this->AsyncDownloadPBO->Download3D(this->Array->GetDataType(),
this->Array->GetVoidPointer(ptId * numComps), reinterpret_cast<unsigned int*>(gpudims),
numComps, continuousInc);
this->AsyncDownloadPBO = nullptr;
return reply;
}
//------------------------------------------------------------------------------
bool vtkDataTransferHelper::GetShaderSupportsTextureInt()
{
return this->ShaderSupportsTextureInt;
}
//------------------------------------------------------------------------------
void vtkDataTransferHelper::SetShaderSupportsTextureInt(bool value)
{
this->ShaderSupportsTextureInt = value;
}
//------------------------------------------------------------------------------
vtkPixelBufferObject* vtkDataTransferHelper::GetPBO()
{
if (!this->PBO)
{
this->PBO = vtkSmartPointer<vtkPixelBufferObject>::New();
this->PBO->SetContext(this->Context);
}
return this->PBO;
}
//------------------------------------------------------------------------------
void vtkDataTransferHelper::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "Array: " << this->Array << endl;
os << indent << "Texture: " << this->Texture << endl;
os << indent << "MinTextureDimension: " << this->MinTextureDimension << endl;
os << indent << "CPUExtent: (" << this->CPUExtent[0] << ", " << this->CPUExtent[1] << ", "
<< this->CPUExtent[2] << ", " << this->CPUExtent[3] << ", " << this->CPUExtent[4] << ", "
<< this->CPUExtent[5] << ")" << endl;
os << indent << "GPUExtent: (" << this->GPUExtent[0] << ", " << this->GPUExtent[1] << ", "
<< this->GPUExtent[2] << ", " << this->GPUExtent[3] << ", " << this->GPUExtent[4] << ", "
<< this->GPUExtent[5] << ")" << endl;
os << indent << "TextureExtent: (" << this->TextureExtent[0] << ", " << this->TextureExtent[1]
<< ", " << this->TextureExtent[2] << ", " << this->TextureExtent[3] << ", "
<< this->TextureExtent[4] << ", " << this->TextureExtent[5] << ")" << endl;
}