mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-20 11:05:44 +00:00
115 lines
3.4 KiB
C++
115 lines
3.4 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 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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//
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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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#ifndef vtk_m_rendering_CanvasEGL_h
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#define vtk_m_rendering_CanvasEGL_h
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#include <vtkm/Types.h>
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#include <vtkm/cont/ArrayPortalToIterators.h>
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#include <vtkm/rendering/CanvasGL.h>
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#include <vtkm/rendering/Color.h>
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#include <EGL/egl.h>
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//#include <GL/gl.h>
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#include <iostream>
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#include <fstream>
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namespace vtkm {
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namespace rendering {
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class CanvasEGL : public CanvasGL
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{
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public:
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VTKM_CONT_EXPORT
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CanvasEGL(vtkm::Id width=1024,
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vtkm::Id height=1024)
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: CanvasGL(width,height)
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{
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ctx = NULL;
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this->ResizeBuffers(width, height);
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}
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VTKM_CONT_EXPORT
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virtual void Initialize()
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{
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if (!(dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY)))
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throw vtkm::cont::ErrorControlBadValue("Failed to get EGL display");
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EGLint major, minor;
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if (!(eglInitialize(dpy, &major, &minor)))
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throw vtkm::cont::ErrorControlBadValue("Failed to initialize EGL display");
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const EGLint cfgAttrs[] =
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{
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EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
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EGL_BLUE_SIZE, 8,
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EGL_GREEN_SIZE, 8,
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EGL_RED_SIZE, 8,
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EGL_DEPTH_SIZE, 8,
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EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
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EGL_NONE
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};
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EGLint nCfgs;
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EGLConfig cfg;
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if (!(eglChooseConfig(dpy, cfgAttrs, &cfg, 1, &nCfgs)) || nCfgs == 0)
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throw vtkm::cont::ErrorControlBadValue("Failed to get EGL config");
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const EGLint pbAttrs[] =
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{
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EGL_WIDTH, static_cast<EGLint>(this->GetWidth()),
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EGL_HEIGHT, static_cast<EGLint>(this->GetHeight()),
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EGL_NONE,
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};
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if (!(surf = eglCreatePbufferSurface(dpy, cfg, pbAttrs)))
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throw vtkm::cont::ErrorControlBadValue("Failed to create EGL PBuffer surface");
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eglBindAPI(EGL_OPENGL_API);
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if (!(ctx = eglCreateContext(dpy, cfg, EGL_NO_CONTEXT, NULL)))
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throw vtkm::cont::ErrorControlBadValue("Failed to create EGL context");
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if (!(eglMakeCurrent(dpy, surf, surf, ctx)))
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throw vtkm::cont::ErrorControlBadValue("Failed to create EGL context current");
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}
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VTKM_CONT_EXPORT
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virtual void Activate()
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{
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glEnable(GL_DEPTH_TEST);
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}
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VTKM_CONT_EXPORT
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virtual void Clear()
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{
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vtkm::rendering::Color backgroundColor = this->GetBackgroundColor();
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glClearColor(backgroundColor.Components[0],
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backgroundColor.Components[1],
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backgroundColor.Components[2],
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1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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}
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private:
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EGLContext ctx;
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EGLDisplay dpy;
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EGLSurface surf;
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};
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}} //namespace vtkm::rendering
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#endif //vtk_m_rendering_CanvasEGL_h
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