Qt 5.6 | Qt Widgets | Boxes | glextensions.cpp Example File

Qt 5.6.3 Reference Documentation

# glextensions.cpp Example File

graphicsview/boxes/glextensions.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the demonstration applications of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:LGPL21$
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      ** Alternatively, this file may be used under the terms of the GNU Lesser
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      ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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      #include "glextensions.h"

      #define RESOLVE_GL_FUNC(f) ok &= bool((f = (_gl##f) context->getProcAddress(QLatin1String("gl" #f))));

      bool GLExtensionFunctions::resolve(const QGLContext *context)
      {
          bool ok = true;

          RESOLVE_GL_FUNC(GenFramebuffersEXT)
          RESOLVE_GL_FUNC(GenRenderbuffersEXT)
          RESOLVE_GL_FUNC(BindRenderbufferEXT)
          RESOLVE_GL_FUNC(RenderbufferStorageEXT)
          RESOLVE_GL_FUNC(DeleteFramebuffersEXT)
          RESOLVE_GL_FUNC(DeleteRenderbuffersEXT)
          RESOLVE_GL_FUNC(BindFramebufferEXT)
          RESOLVE_GL_FUNC(FramebufferTexture2DEXT)
          RESOLVE_GL_FUNC(FramebufferRenderbufferEXT)
          RESOLVE_GL_FUNC(CheckFramebufferStatusEXT)

          RESOLVE_GL_FUNC(ActiveTexture)
          RESOLVE_GL_FUNC(TexImage3D)

          RESOLVE_GL_FUNC(GenBuffers)
          RESOLVE_GL_FUNC(BindBuffer)
          RESOLVE_GL_FUNC(BufferData)
          RESOLVE_GL_FUNC(DeleteBuffers)
          RESOLVE_GL_FUNC(MapBuffer)
          RESOLVE_GL_FUNC(UnmapBuffer)

          return ok;
      }

      bool GLExtensionFunctions::fboSupported() {
          return GenFramebuffersEXT
                  && GenRenderbuffersEXT
                  && BindRenderbufferEXT
                  && RenderbufferStorageEXT
                  && DeleteFramebuffersEXT
                  && DeleteRenderbuffersEXT
                  && BindFramebufferEXT
                  && FramebufferTexture2DEXT
                  && FramebufferRenderbufferEXT
                  && CheckFramebufferStatusEXT;
      }

      bool GLExtensionFunctions::openGL15Supported() {
          return ActiveTexture
                  && TexImage3D
                  && GenBuffers
                  && BindBuffer
                  && BufferData
                  && DeleteBuffers
                  && MapBuffer
                  && UnmapBuffer;
      }

      #undef RESOLVE_GL_FUNC