glextensions.cpp Example File

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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