Compute shader renderer (#2041)

* nothing works yet

* don't double buffer 3D framebuffers for the GL Renderer
looks like leftovers from when 3D+2D composition was done in the frontend

* oops

* it works!

* implement display capture for compute renderer
it's actually just all stolen from the regular OpenGL renderer

* fix bad indirect call

* handle cleanup properly

* add hires rendering to the compute shader renderer

* fix UB
also misc changes to use more unsigned multiplication
also fix framebuffer resize

* correct edge filling behaviour when AA is disabled

* fix full color textures

* fix edge marking (polygon id is 6-bit not 5)
also make the code a bit nicer

* take all edge cases into account for XMin/XMax calculation

* use hires coordinate again

* stop using fixed size buffers based on scale factor in shaders
this makes shader compile times tolerable on Wintel
- beginning of the shader cache
- increase size of tile idx in workdesc to 20 bits

* apparently & is not defined on bvec4
why does this even compile on Intel and Nvidia?

* put the texture cache into it's own file

* add compute shader renderer properly to the GUI
also add option to toggle using high resolution vertex coordinates

* unbind sampler object in compute shader renderer

* fix GetRangedBitMask for 64 bit aligned 64 bits
pretty embarassing

* convert NonStupidBitfield.h back to LF only new lines

* actually adapt to latest changes

* fix stupid merge

* actually make compute shader renderer work with newest changes

* show progress on shader compilation

* remove merge leftover

src/frontend/qt_sdl/Config.cpp

@@ -22,6 +22,7 @@
 #include <inttypes.h>
 #include "Platform.h"
 #include "Config.h"
+#include "GPU.h"
 
 
 namespace Config
@@ -59,6 +60,7 @@ bool Threaded3D;
 
 int GL_ScaleFactor;
 bool GL_BetterPolygons;
+bool GL_HiresCoordinates;
 
 bool LimitFPS;
 int MaxFPS;
@@ -246,11 +248,12 @@ ConfigEntry ConfigFile[] =
     {"ScreenVSync",         1, &ScreenVSync,         false, false},
     {"ScreenVSyncInterval", 0, &ScreenVSyncInterval, 1, false},
 
-    {"3DRenderer", 0, &_3DRenderer, 0, false},
+    {"3DRenderer", 0, &_3DRenderer, renderer3D_Software, false},
     {"Threaded3D", 1, &Threaded3D, true, false},
 
     {"GL_ScaleFactor", 0, &GL_ScaleFactor, 1, false},
     {"GL_BetterPolygons", 1, &GL_BetterPolygons, false, false},
+    {"GL_HiresCoordinates", 1, &GL_HiresCoordinates, true, false},
 
     {"LimitFPS", 1, &LimitFPS, true, false},
     {"MaxFPS", 0, &MaxFPS, 1000, false},