Method AllocateProxyTexture3D

Rendering/OpenGL2/vtkTextureObject.cxx:1556–1596

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
bool vtkTextureObject::AllocateProxyTexture3D(
  unsigned int width, unsigned int height, unsigned int depth, int numComps, int dataType)
{
#ifndef GL_ES_VERSION_3_0
  assert(this->Context);

  this->GetDataType(dataType);
  this->GetInternalFormat(dataType, numComps, false);
  this->GetFormat(dataType, numComps, false);

  if (!this->InternalFormat || !this->Format || !this->Type)
  {
    vtkErrorMacro("Failed to determine texture parameters.");
    return false;
  }

  this->Target = GL_TEXTURE_3D;
  this->Context->ActivateTexture(this);
  this->CreateTexture();
  this->Bind();

  glTexImage3D(GL_PROXY_TEXTURE_3D, 0, this->InternalFormat, static_cast<GLsizei>(width),
    static_cast<GLsizei>(height), static_cast<GLsizei>(depth), 0, this->Format, this->Type,
    nullptr);

  GLsizei testWidth;
  glGetTexLevelParameteriv(GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_WIDTH, &testWidth);

  vtkOpenGLCheckErrorMacro("Failed after glTexImage3D with PROXY target");
  this->Deactivate();

  return testWidth != 0;
#else
  (void)width;
  (void)height;
  (void)depth;
  (void)numComps;
  (void)dataType;
  return true;
#endif
}

//------------------------------------------------------------------------------
bool vtkTextureObject::Create2DFromRaw(