Gnetum

This is a major update to Gnetum, coming with new performance improvements and greatly enhanced mod compatibility.

Performance

• Added new optimization for framebuffer blitting
  • This was added because Gnetum is incompatible with OptiFine's Fast Render option, and can be considered as a less effective but much more compatible alternative to that option.
  • Unlike Fast Render, which makes the game completely skip the framebuffer copy process (and thus causing a lot of incompatibilities), this optimization makes the copy process much more efficient.
• Added an alternative method for framebuffer clear, which does not introduce additional bind/unbind operations and should be slightly faster

Fixes

• Fixed HUD updates being delayed by one frame
• Fixed bufferHand option when using shaders
• Fixed compatibility with ScalingGUIs mod
• Fixed compatibility with Thaumcraft mod
• Fixed compatibility with Time is up mod
• Fixed crosshair flickering when it's behind other HUD elements
• Fixed debug pie background color being incorrect
• Fixed framebuffer sometimes not resized properly when switching fullscreen
• Fixed OptiFine's vignette option not respected
• Fixed rendering with pumpkin head
• Fixed blackscreen when falling into the void with shaders enabled