Merge dpJudas's renderslices branch (#1356)

* Remove threading from the drawers

* Fix some r_scene_multithreaded related bugs

* Fix some r_scene_multithreaded crashes

* Fix fullbright shade bug

* Fix truecolor drawer crash

* Add debug code for showing the render slices

* Fix texture loading race condition and improve performance by only locking the load mutex if data hasn't already been updated for this frame

Co-authored-by: Magnus Norddahl <dpjudas@users.noreply.github.com>

src/rendering/swrenderer/drawers/r_draw.h

@@ -19,14 +19,12 @@ EXTERN_CVAR(Float, transsouls);
 EXTERN_CVAR(Bool, r_dynlights);
 EXTERN_CVAR(Bool, r_fuzzscale);
 
-class DrawerCommandQueue;
-typedef std::shared_ptr<DrawerCommandQueue> DrawerCommandQueuePtr;
-
 namespace swrenderer
 {
 	class DrawerArgs;
 	class SkyDrawerArgs;
 	class WallDrawerArgs;
+	class WallColumnDrawerArgs;
 	class SpanDrawerArgs;
 	class SpriteDrawerArgs;
 	class VoxelBlock;
@@ -55,8 +53,8 @@ namespace swrenderer
 	class SWPixelFormatDrawers
 	{
 	public:
-		SWPixelFormatDrawers(DrawerCommandQueuePtr queue) : Queue(queue) { }
-		virtual ~SWPixelFormatDrawers() { }
+		SWPixelFormatDrawers(RenderThread* thread) : thread(thread) { }
+		virtual ~SWPixelFormatDrawers() = default;
 		virtual void DrawWall(const WallDrawerArgs &args) = 0;
 		virtual void DrawWallMasked(const WallDrawerArgs &args) = 0;
 		virtual void DrawWallAdd(const WallDrawerArgs &args) = 0;
@@ -94,11 +92,15 @@ namespace swrenderer
 		virtual void DrawTiltedSpan(const SpanDrawerArgs &args, const FVector3 &plane_sz, const FVector3 &plane_su, const FVector3 &plane_sv, bool plane_shade, int planeshade, float planelightfloat, fixed_t pviewx, fixed_t pviewy, FDynamicColormap *basecolormap) = 0;
 		virtual void DrawColoredSpan(const SpanDrawerArgs &args) = 0;
 		virtual void DrawFogBoundaryLine(const SpanDrawerArgs &args) = 0;
+		virtual void DrawParticleColumn(int x, int yl, int ycount, uint32_t fg, uint32_t alpha, uint32_t fracposx) = 0;
 
+		void DrawDepthColumn(const WallColumnDrawerArgs& args, float idepth);
 		void DrawDepthSkyColumn(const SkyDrawerArgs &args, float idepth);
 		void DrawDepthSpan(const SpanDrawerArgs &args, float idepth1, float idepth2);
-
-		DrawerCommandQueuePtr Queue;
+
+		void SetLights(WallColumnDrawerArgs& drawerargs, int x, int y1, const WallDrawerArgs& wallargs);
+
+		RenderThread* thread = nullptr;
 	};
 
 	void R_InitShadeMaps();