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/*=========================================================================
Program: Visualization Toolkit
Module: TestContext2D.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 "vtkContext2D.h"
#include "vtkContextActor.h"
#include "vtkContextDevice2D.h"
#include "vtkContextItem.h"
#include "vtkContextScene.h"
#include "vtkContextView.h"
#include "vtkNew.h"
#include "vtkObjectFactory.h"
#include "vtkOpenGLContextDevice2D.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkSmartPointer.h"
#include "vtkTextProperty.h"
//------------------------------------------------------------------------------
namespace
{
class ContextItem : public vtkContextItem
{
public:
ContextItem()
: Succeeded(true)
{
}
static ContextItem* New();
vtkTypeMacro(ContextItem, vtkContextItem);
bool Paint(vtkContext2D* painter) override;
bool Succeeded;
};
//------------------------------------------------------------------------------
vtkStandardNewMacro(ContextItem);
//------------------------------------------------------------------------------
bool IsVector4Same(float expected[4], float computed[4])
{
// The origin should be with 3 px of the expected value. This is because we
// align to the text data (ie. actual drawn pixels), not the texture image
// size, which may include a degree of padding.
const float originEps = 3.f;
const bool closeOrigin =
(fabs(expected[0] - computed[0]) <= originEps && fabs(expected[1] - computed[1]) <= originEps);
// The width / height should be the same:
const float sizeEps = 1e-6f;
const bool sameSize =
(fabs(expected[2] - computed[2]) <= sizeEps && fabs(expected[3] - computed[3]) <= sizeEps);
if (!sameSize || !closeOrigin)
{
std::cout << "Not the same!\n";
std::cout << "Expected: (" << expected[0] << ", " << expected[1] << ", " << expected[2] << ", "
<< expected[3] << ")\n";
std::cout << "Computed: (" << computed[0] << ", " << computed[1] << ", " << computed[2] << ", "
<< computed[3] << ")\n";
return false;
}
return true;
}
//------------------------------------------------------------------------------
bool ContextItem::Paint(vtkContext2D* painter)
{
const char* text = "Test";
float expectedUnjustifiedBounds[4];
painter->ComputeStringBounds(text, expectedUnjustifiedBounds);
float expectedJustifiedBounds[4] = { 0, 0, expectedUnjustifiedBounds[2],
expectedUnjustifiedBounds[3] };
float unjustifiedBounds[4];
float justifiedBounds[4];
// Left justification
painter->GetTextProp()->SetJustification(VTK_TEXT_LEFT);
painter->ComputeStringBounds(text, unjustifiedBounds);
std::cout << "Left-justified ComputeStringBounds\n";
this->Succeeded = this->Succeeded && IsVector4Same(expectedUnjustifiedBounds, unjustifiedBounds);
painter->ComputeJustifiedStringBounds(text, justifiedBounds);
std::cout << "Left-justified ComputeJustifiedStringBounds\n";
this->Succeeded = this->Succeeded && IsVector4Same(expectedJustifiedBounds, justifiedBounds);
// Center justification
painter->GetTextProp()->SetJustification(VTK_TEXT_CENTERED);
painter->ComputeStringBounds(text, unjustifiedBounds);
std::cout << "Center-justified ComputeStringBounds\n";
this->Succeeded = this->Succeeded && IsVector4Same(expectedUnjustifiedBounds, unjustifiedBounds);
expectedJustifiedBounds[0] = -0.5 * expectedUnjustifiedBounds[2]; // negative half the width
painter->ComputeJustifiedStringBounds(text, justifiedBounds);
std::cout << "Center-justified ComputeJustifiedStringBounds\n";
this->Succeeded = this->Succeeded && IsVector4Same(expectedJustifiedBounds, justifiedBounds);
// Right justification
painter->GetTextProp()->SetJustification(VTK_TEXT_RIGHT);
painter->ComputeStringBounds(text, unjustifiedBounds);
std::cout << "Right-justified ComputeStringBounds\n";
this->Succeeded = this->Succeeded && IsVector4Same(expectedUnjustifiedBounds, unjustifiedBounds);
expectedJustifiedBounds[0] = -expectedUnjustifiedBounds[2]; // negative full width
painter->ComputeJustifiedStringBounds(text, justifiedBounds);
std::cout << "Right-justified result from ComputeJustifiedStringBounds\n";
this->Succeeded = this->Succeeded && IsVector4Same(expectedJustifiedBounds, justifiedBounds);
return true;
}
} // end anonymous namespace
//------------------------------------------------------------------------------
int TestContext2D(int, char*[])
{
// Set up a 2D context view, context test object and add it to the scene
vtkNew<vtkContextView> view;
view->GetRenderWindow()->SetSize(300, 300);
vtkNew<ContextItem> test;
view->GetScene()->AddItem(test);
// Force the use of the freetype based rendering strategy
vtkOpenGLContextDevice2D::SafeDownCast(view->GetContext()->GetDevice())
->SetStringRendererToFreeType();
view->GetRenderWindow()->SetMultiSamples(0);
view->GetInteractor()->Initialize();
view->Render();
// Exercise NewInstance for coverage.
auto dummy = test->NewInstance();
dummy->Delete();
return test->Succeeded ? EXIT_SUCCESS : EXIT_FAILURE;
}
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