Method applyState

Engine/source/gfx/gl/gfxGLTextureTarget.cpp:161–224

}

void _GFXGLTextureTargetFBOImpl::applyState()
{   
   // REMINDER: When we implement MRT support, check against GFXGLDevice::getNumRenderTargets()
   
   PRESERVE_FRAMEBUFFER();
   glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
   glEnable(GL_FRAMEBUFFER_SRGB);
   bool drawbufs[16];
   int bufsize = 0;
   for (int i = 0; i < 16; i++)
           drawbufs[i] = false;
   bool hasColor = false;
   for(int i = 0; i < GFXGL->getNumRenderTargets(); ++i)
   {   
      _GFXGLTargetDesc* color = mTarget->getTargetDesc( static_cast<GFXTextureTarget::RenderSlot>(GFXTextureTarget::Color0+i ));
      if(color)
      {
         hasColor = true;
         const GLenum binding = color->getBinding();
         if( binding == GL_TEXTURE_2D || (binding >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && binding <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) )
            glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, color->getBinding( ), color->getHandle( ), color->getMipLevel( ) );
         else if( binding == GL_TEXTURE_1D )
            glFramebufferTexture1D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, color->getBinding( ), color->getHandle( ), color->getMipLevel( ) );
         else if( binding == GL_TEXTURE_3D )
            glFramebufferTexture3D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, color->getBinding( ), color->getHandle( ), color->getMipLevel( ), color->getZOffset( ) );
         else
             Con::errorf("_GFXGLTextureTargetFBOImpl::applyState - Bad binding");
      }
      else
      {
         // Clears the texture (note that the binding is irrelevent)
         glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0+i, GL_TEXTURE_2D, 0, 0);
      }
   }
   
   _GFXGLTargetDesc* depthStecil = mTarget->getTargetDesc(GFXTextureTarget::DepthStencil);
   if(depthStecil)
   {
      // Certain drivers have issues with depth only FBOs.  That and the next two asserts assume we have a color target.
      AssertFatal(hasColor, "GFXGLTextureTarget::applyState() - Cannot set DepthStencil target without Color0 target!");
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, depthStecil->getBinding(), depthStecil->getHandle(), depthStecil->getMipLevel());
   }
   else
   {
      // Clears the texture (note that the binding is irrelevent)
      glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
   }

   GLenum *buf = new GLenum[bufsize];
   int count = 0;
   for (int i = 0; i < bufsize; i++)
   {
           if (drawbufs[i])
           {
                   buf[count] = GL_COLOR_ATTACHMENT0 + i;
                   count++;
           }
   }