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Each Maxwell shader stage can have an arbitrary number of textures, but we're limited to a certain number in OpenGL. We try to only use the minimum amount of host textures by not keeping a 1:1 relation between guest texture ids and host texture ids, ie, guest texture id 8 can be host texture id 0 if it's the only texture used in the guest shader program.
This mapping will have to be passed to the shader decompiler so it can rewrite the texture accesses.
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It will now use the UnswizzleTexture function instead of the MortonCopyPixels128, which doesn't seem to work for textures.
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Compressed texture formats like DXT1, DXT2, DXT3, etc will use this to ease the load on the CPU.
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We're only left with RGB8 and DXT1 for now. More will be added as they are needed.
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HLEing them.
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The Ryujinx macro interpreter and envydis were used as reference.
Macros are programs that are uploaded by the games during boot and can later be called by writing to their method id in a GPU command buffer.
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function.
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