Shadowbuffers

[JayFoxRox]

shadowbuffer

• [x] Support for shadow samplers [Done]
• [x] Rewrite the screen- to clip-space logic [Done]
• [x] Z-Clip Min/Max [Done, but untested]
• [ ] Fix clipping bugs and perspective correction in games like DoA3 [TODO]
• [ ] Cleanup [TODO]

  shadowbuffer-f24

• [ ] shadowbuffer base
• [ ] Support for F24 depth format [Done, but requires a hack for precision / rounding errors]
• [ ] Bit order might be wrong [Won't test]
• [ ] Cleanup [TODO]

  shadowbuffer-f24-clip-control

• [ ] shadowbuffer-f24 base
• [ ] Move float targets from [0,1] GL range to [0,depth_limit] xbox range