mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-19 18:45:43 +00:00
104 lines
3.8 KiB
C++
104 lines
3.8 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt 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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// Copyright 2016 Sandia Corporation.
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// Copyright 2016 UT-Battelle, LLC.
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// Copyright 2016 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#include <vtkm/rendering/BitmapFontFactory.h>
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#include <vtkm/rendering/DecodePNG.h>
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#include <vtkm/rendering/LineRenderer.h>
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#include <vtkm/rendering/TextRenderer.h>
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#include <vtkm/rendering/WorldAnnotator.h>
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namespace vtkm
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{
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namespace rendering
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{
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WorldAnnotator::WorldAnnotator(const vtkm::rendering::Canvas* canvas)
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: Canvas(canvas)
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{
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}
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WorldAnnotator::~WorldAnnotator()
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{
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}
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void WorldAnnotator::AddLine(const vtkm::Vec<vtkm::Float64, 3>& point0,
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const vtkm::Vec<vtkm::Float64, 3>& point1,
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vtkm::Float32 lineWidth,
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const vtkm::rendering::Color& color,
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bool vtkmNotUsed(inFront)) const
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{
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// Default implementation does nothing. Should this be pure virtual and force
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// all subclasses to implement this? We would have to implement a
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// WorldAnnotator for ray tracing first.
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vtkm::Matrix<vtkm::Float32, 4, 4> transform =
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vtkm::MatrixMultiply(Canvas->GetProjection(), Canvas->GetModelView());
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LineRenderer renderer(Canvas, transform);
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renderer.RenderLine(point0, point1, lineWidth, color);
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}
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void WorldAnnotator::AddText(const vtkm::Vec<vtkm::Float32, 3>& origin,
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const vtkm::Vec<vtkm::Float32, 3>& right,
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const vtkm::Vec<vtkm::Float32, 3>& up,
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vtkm::Float32 scale,
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const vtkm::Vec<vtkm::Float32, 2>& anchor,
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const vtkm::rendering::Color& color,
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const std::string& text) const
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{
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// Default implementation does nothing. Should this be pure virtual and force
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// all subclasses to implement this? We would have to implement a
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// WorldAnnotator for ray tracing first.
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if (!FontTexture.IsValid())
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{
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if (!LoadFont())
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{
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return;
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}
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}
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TextRenderer renderer(Canvas, Font, FontTexture);
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renderer.RenderText(origin, right, up, scale, anchor, color, text);
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}
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bool WorldAnnotator::LoadFont() const
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{
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this->Font = BitmapFontFactory::CreateLiberation2Sans();
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const std::vector<unsigned char>& rawPNG = this->Font.GetRawImageData();
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std::vector<unsigned char> rgba;
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unsigned long textureWidth, textureHeight;
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int error = DecodePNG(rgba, textureWidth, textureHeight, &rawPNG[0], rawPNG.size());
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if (error != 0)
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{
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return false;
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}
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std::size_t numValues = textureWidth * textureHeight;
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std::vector<unsigned char> alpha(numValues);
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for (std::size_t i = 0; i < numValues; ++i)
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{
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alpha[i] = rgba[i * 4 + 3];
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}
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vtkm::cont::ArrayHandle<vtkm::UInt8> textureHandle = vtkm::cont::make_ArrayHandle(alpha);
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this->FontTexture = vtkm::rendering::Canvas::FontTextureType(
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vtkm::Id(textureWidth), vtkm::Id(textureHeight), textureHandle);
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this->FontTexture.SetFilterMode(TextureFilterMode::Linear);
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this->FontTexture.SetWrapMode(TextureWrapMode::Clamp);
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return true;
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}
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}
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} // namespace vtkm::rendering
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