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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPDFExporter.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 "vtkPDFExporter.h"
#include "vtkContext2D.h"
#include "vtkContextActor.h"
#include "vtkContextScene.h"
#include "vtkNew.h"
#include "vtkObjectFactory.h"
#include "vtkPDFContextDevice2D.h"
#include "vtkProp.h"
#include "vtkPropCollection.h"
#include "vtkRenderWindow.h"
#include "vtkRenderer.h"
#include "vtkRendererCollection.h"
#include <vtk_libharu.h>
#include <iomanip>
#include <sstream>
#include <stdexcept>
VTK_ABI_NAMESPACE_BEGIN
namespace
{
void HPDF_STDCALL handle_libharu_error(HPDF_STATUS error, HPDF_STATUS detail, void*)
{
std::ostringstream out;
out << "LibHaru failed during PDF export. Error=0x" << std::hex << error << " detail=" << std::dec
<< detail;
throw std::runtime_error(out.str());
}
} // end anon namespace
//------------------------------------------------------------------------------
// vtkPDFExporter::Details
//------------------------------------------------------------------------------
struct vtkPDFExporter::Details
{
HPDF_Doc Document;
HPDF_Page Page;
};
//------------------------------------------------------------------------------
// vtkPDFExporter
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
vtkStandardNewMacro(vtkPDFExporter);
//------------------------------------------------------------------------------
void vtkPDFExporter::PrintSelf(std::ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//------------------------------------------------------------------------------
vtkPDFExporter::vtkPDFExporter()
: Title(nullptr)
, FileName(nullptr)
, Impl(new Details)
{
this->SetTitle("VTK Exported Scene");
}
//------------------------------------------------------------------------------
vtkPDFExporter::~vtkPDFExporter()
{
this->SetTitle(nullptr);
this->SetFileName(nullptr);
delete this->Impl;
}
//------------------------------------------------------------------------------
void vtkPDFExporter::WriteData()
{
if (!this->FileName || !*this->FileName)
{
vtkErrorMacro("FileName not specified.");
return;
}
this->Impl->Document = HPDF_New(handle_libharu_error, nullptr);
if (!this->Impl->Document)
{
vtkErrorMacro("Error initializing LibHaru PDF document: HPDF_New failed.");
return;
}
try
{
this->WritePDF();
HPDF_SaveToFile(this->Impl->Document, this->FileName);
}
catch (std::runtime_error& e)
{
vtkErrorMacro(<< e.what());
}
HPDF_Free(this->Impl->Document);
}
//------------------------------------------------------------------------------
void vtkPDFExporter::WritePDF()
{
this->PrepareDocument();
this->RenderContextActors();
}
//------------------------------------------------------------------------------
void vtkPDFExporter::PrepareDocument()
{
// Compress everything:
HPDF_SetCompressionMode(this->Impl->Document, HPDF_COMP_ALL);
// Various metadata:
HPDF_SetInfoAttr(this->Impl->Document, HPDF_INFO_CREATOR, "The Visualization ToolKit");
HPDF_SetInfoAttr(this->Impl->Document, HPDF_INFO_TITLE, this->Title);
this->Impl->Page = HPDF_AddPage(this->Impl->Document);
HPDF_Page_SetWidth(this->Impl->Page, this->RenderWindow->GetSize()[0]);
HPDF_Page_SetHeight(this->Impl->Page, this->RenderWindow->GetSize()[1]);
}
//------------------------------------------------------------------------------
void vtkPDFExporter::RenderContextActors()
{
vtkRendererCollection* renCol = this->RenderWindow->GetRenderers();
int numLayers = this->RenderWindow->GetNumberOfLayers();
for (int i = 0; i < numLayers; ++i)
{
vtkCollectionSimpleIterator renIt;
vtkRenderer* ren;
for (renCol->InitTraversal(renIt); (ren = renCol->GetNextRenderer(renIt));)
{
if (this->ActiveRenderer && ren != this->ActiveRenderer)
{
// If ActiveRenderer is specified then ignore all other renderers
continue;
}
if (ren->GetLayer() == i)
{
vtkPropCollection* props = ren->GetViewProps();
vtkCollectionSimpleIterator propIt;
vtkProp* prop;
for (props->InitTraversal(propIt); (prop = props->GetNextProp(propIt));)
{
vtkContextActor* actor = vtkContextActor::SafeDownCast(prop);
if (actor)
{
this->RenderContextActor(actor, ren);
}
}
}
}
}
}
//------------------------------------------------------------------------------
void vtkPDFExporter::RenderContextActor(vtkContextActor* actor, vtkRenderer* ren)
{
vtkContextDevice2D* oldForceDevice = actor->GetForceDevice();
vtkNew<vtkPDFContextDevice2D> device;
device->SetHaruObjects(&this->Impl->Document, &this->Impl->Page);
device->SetRenderer(ren);
actor->SetForceDevice(device);
actor->RenderOverlay(ren);
actor->SetForceDevice(oldForceDevice);
}
VTK_ABI_NAMESPACE_END
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