mirror of https://gitee.com/openkylin/vtk9.git
114 lines
3.2 KiB
C++
114 lines
3.2 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkOpenGLContextActor.cxx
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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#include "vtkOpenGLContextActor.h"
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#include "vtkContext2D.h"
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#include "vtkContext3D.h"
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#include "vtkContextScene.h"
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#include "vtkObjectFactory.h"
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#include "vtkOpenGLContextDevice2D.h"
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#include "vtkOpenGLContextDevice3D.h"
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#include "vtkRenderer.h"
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vtkStandardNewMacro(vtkOpenGLContextActor);
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//------------------------------------------------------------------------------
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vtkOpenGLContextActor::vtkOpenGLContextActor() = default;
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//------------------------------------------------------------------------------
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vtkOpenGLContextActor::~vtkOpenGLContextActor() = default;
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//------------------------------------------------------------------------------
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void vtkOpenGLContextActor::ReleaseGraphicsResources(vtkWindow* window)
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{
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vtkOpenGLContextDevice2D* device =
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vtkOpenGLContextDevice2D::SafeDownCast(this->Context->GetDevice());
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if (device)
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{
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device->ReleaseGraphicsResources(window);
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}
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if (this->Scene)
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{
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this->Scene->ReleaseGraphicsResources();
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}
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}
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//------------------------------------------------------------------------------
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// Renders an actor2D's property and then it's mapper.
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int vtkOpenGLContextActor::RenderOverlay(vtkViewport* viewport)
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{
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vtkDebugMacro(<< "vtkContextActor::RenderOverlay");
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if (!this->Context)
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{
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vtkErrorMacro(<< "vtkContextActor::Render - No painter set");
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return 0;
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}
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if (!this->Initialized)
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{
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this->Initialize(viewport);
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}
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vtkOpenGLContextDevice3D::SafeDownCast(this->Context3D->GetDevice())->Begin(viewport);
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return this->Superclass::RenderOverlay(viewport);
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}
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//------------------------------------------------------------------------------
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void vtkOpenGLContextActor::Initialize(vtkViewport* viewport)
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{
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vtkContextDevice2D* dev2D = nullptr;
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vtkDebugMacro("Using OpenGL 2 for 2D rendering.");
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if (this->ForceDevice)
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{
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dev2D = this->ForceDevice;
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dev2D->Register(this);
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}
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else
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{
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dev2D = vtkOpenGLContextDevice2D::New();
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}
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if (dev2D)
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{
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this->Context->Begin(dev2D);
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vtkOpenGLContextDevice2D* oglDev2D = vtkOpenGLContextDevice2D::SafeDownCast(dev2D);
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if (oglDev2D)
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{
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vtkOpenGLContextDevice3D* dev3D = vtkOpenGLContextDevice3D::New();
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dev3D->Initialize(vtkRenderer::SafeDownCast(viewport), oglDev2D);
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this->Context3D->Begin(dev3D);
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dev3D->Delete();
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}
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dev2D->Delete();
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this->Initialized = true;
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}
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else
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{
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// Failed
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vtkErrorMacro("Error: failed to initialize the render device.");
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}
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}
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//------------------------------------------------------------------------------
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void vtkOpenGLContextActor::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os, indent);
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}
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