mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-21 19:45:44 +00:00
2be7a8e032
The template parameters on vtkm::rendering::View are unnecessary. All three of the templated classes are polymorphic (with virtual functions). Thus, you just have to specify them at the constructor. Removing the template parameters makes the syntax a bit cleaner and removes some unnecessary duplication in the executable. Removing the template does mean we cannot optimize in the future. However, I expect us to start using more virtual methods rather than less, so I think this is a move in the right direction.
148 lines
4.2 KiB
C++
148 lines
4.2 KiB
C++
//=============================================================================
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//
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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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//
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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 2015 Sandia Corporation.
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// Copyright 2015 UT-Battelle, LLC.
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// Copyright 2015 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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// 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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//=============================================================================
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#ifndef vtk_m_TextureGL_h
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#define vtk_m_TextureGL_h
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#include <vtkm/rendering/internal/OpenGLHeaders.h>
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#include <vtkm/rendering/ColorTable.h>
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#include <vector>
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namespace vtkm {
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namespace rendering {
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class TextureGL
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{
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public:
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GLuint ID;
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int Dimension;
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bool MIPMap;
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bool Linear2D;
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bool LinearMIP;
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public:
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TextureGL()
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{
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this->ID = 0;
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this->Dimension = 0;
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this->MIPMap = false;
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this->Linear2D = true;
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this->LinearMIP = true;
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}
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void Enable() const
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{
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if (this->ID == 0)
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return;
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if (this->Dimension == 1)
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{
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// no this->MIPMapping for 1D (at the moment)
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glBindTexture(GL_TEXTURE_1D, this->ID);
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glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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if (this->Linear2D)
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{
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glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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}
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else
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{
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glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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}
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glEnable(GL_TEXTURE_1D);
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}
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else if (this->Dimension == 2)
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{
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glBindTexture(GL_TEXTURE_2D, this->ID);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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if (this->Linear2D)
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{
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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if (!this->MIPMap)
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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else if (this->LinearMIP)
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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else
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
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}
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else
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{
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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if (!this->MIPMap)
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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else if (this->LinearMIP)
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR);
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else
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
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}
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glEnable(GL_TEXTURE_2D);
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}
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}
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void Disable() const
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{
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if (this->Dimension == 1)
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glDisable(GL_TEXTURE_1D);
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else if (this->Dimension == 2)
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glDisable(GL_TEXTURE_2D);
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}
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void CreateAlphaFromRGBA(int w, int h, std::vector<unsigned char> &rgba)
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{
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this->Dimension = 2;
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std::vector<unsigned char> alpha(rgba.size()/4);
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for (unsigned int i=0; i<alpha.size(); i++)
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{
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alpha[i] = rgba[i*4+3];
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}
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if (this->ID == 0)
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{
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glGenTextures(1, &this->ID);
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}
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if (this->Dimension == 1)
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{
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glBindTexture(GL_TEXTURE_1D, this->ID);
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}
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else if (this->Dimension == 2)
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{
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glBindTexture(GL_TEXTURE_2D, this->ID);
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//#define HW_MIPMAPS
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#ifdef HW_MIPMAPS
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mpimap = true;
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glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
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#endif
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glTexImage2D(GL_TEXTURE_2D, 0,
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GL_ALPHA,
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w, h,
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0,
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GL_ALPHA,
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GL_UNSIGNED_BYTE,
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(void*)(&(alpha[0])));
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}
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}
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};
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}} //namespace vtkm::rendering
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#endif //vtk_m_rendering_TextureGL_h
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