gm82dx9

This extension upgrades Game Maker 8.2 to DirectX version 9.0.

Shader and vertex buffer support by Floogle. Optimized transforms by Lovey01. GML helpers by renex.

What this enables

- better window compositing and performance due to using a modern api
- use HLSL9 vertex and pixel shaders
- create and use vertex buffers and vertex formats for faster drawing
- safe surface functions that won't crash the game
- separate blend mode for the alpha channel
- resize the backbuffer so you can have proper pixel aspect and good fullscreen
- control simple rendering properties such as point mode, fill mode, point sprites
- toggle alpha blend, color write channels, clear the depth buffer
- set the screen clipping region (scissor test) and other viewport utilities
- improved default lighting with specular highlights and spheremap reflections
- plus dozens of extra advanced graphics api functions...