- finished decal render refactoring.

Decals will now be processed into a list in the processing pass, allowing to use the vertex buffer even on GL3 hardware and to offload this part of the work to a multithreaded worker task.

src/gl/scene/gl_decal.cpp

@@ -40,28 +40,6 @@
 #include "gl/scene/gl_scenedrawer.h"
 #include "gl/renderer/gl_quaddrawer.h"
 
-struct DecalVertex
-{
-	float x,y,z;
-	float u,v;
-};
-
-struct GLDecal
-{
-	unsigned int vertindex;
-	FMaterial *gltexture;
-	GLWall *wall;
-	DBaseDecal *decal;
-	DecalVertex dv[4];
-	float zcenter;
-
-	int light;
-	int rel;
-	float a;
-	FColormap colormap;
-
-};
-
 void GLWall::ProcessDecal(HWDrawInfo *di, DBaseDecal *decal)
 {
 	line_t * line = seg->linedef;
@@ -70,11 +48,11 @@ void GLWall::ProcessDecal(HWDrawInfo *di, DBaseDecal *decal)
 	float zpos;
 	bool flipx, flipy;
 	FTextureID decalTile;
-	GLDecal gldecal;
 	
 	
 	if (decal->RenderFlags & RF_INVISIBLE) return;
 	if (type == RENDERWALL_FFBLOCK && gltexture->isMasked()) return;	// No decals on 3D floors with transparent textures.
+	if (seg == nullptr) return;
 	
 	
 	decalTile = decal->PicNum;
@@ -139,7 +117,7 @@ void GLWall::ProcessDecal(HWDrawInfo *di, DBaseDecal *decal)
 			}
 	}
 
-	memset(&gldecal, 0, sizeof(gldecal));
+	GLDecal &gldecal = *di->AddDecal(type == RENDERWALL_MIRRORSURFACE);
 	gldecal.gltexture = FMaterial::ValidateTexture(texture, true);
 	gldecal.wall = this;
 	gldecal.decal = decal;
@@ -286,7 +264,6 @@ void GLWall::ProcessDecal(HWDrawInfo *di, DBaseDecal *decal)
 	{
 		verts.first[i].Set(dv[i].x, dv[i].z, dv[i].y, dv[i].u, dv[i].v);
 	}
-	di->AddDecal(&gldecal);
 }
 
 //==========================================================================
@@ -312,9 +289,8 @@ void GLWall::ProcessDecals(HWDrawInfo *di)
 //
 //
 //==========================================================================
-void FDrawInfo::DrawDecal(GLWall *__wall, DBaseDecal *__decal)
+void FDrawInfo::DrawDecal(GLDecal *gldecal)
 {
-	GLDecal *gldecal;
 	auto wall = gldecal->wall;
 	auto decal = gldecal->decal;
 	auto tex = gldecal->gltexture;
@@ -401,29 +377,42 @@ void FDrawInfo::DrawDecal(GLWall *__wall, DBaseDecal *__decal)
 //
 //
 //==========================================================================
-void FDrawInfo::DoDrawDecals(GLWall *wall)
+void FDrawInfo::DrawDecals()
 {
-	if (wall->seg->sidedef && wall->seg->sidedef->AttachedDecals)
+	GLWall *wall = nullptr;
+	for (auto gldecal : decals[0])
 	{
+		if (gldecal->wall != wall)
+		{
+			wall = gldecal->wall;
 			if (wall->lightlist != nullptr)
 			{
 				gl_RenderState.EnableSplit(true);
 			}
 			else
 			{
+				gl_RenderState.EnableSplit(false);
 				mDrawer->SetFog(wall->lightlevel, wall->rellight + getExtraLight(), &wall->Colormap, false);
 			}
+		}
+		DrawDecal(gldecal);
+	}
+	if (wall && wall->lightlist != nullptr) gl_RenderState.EnableSplit(false);
+}
 
-		DBaseDecal *decal = wall->seg->sidedef->AttachedDecals;
-		while (decal)
+//==========================================================================
+//
+// This list will never get long, so this code should be ok.
+//
+//==========================================================================
+void FDrawInfo::DrawDecalsForMirror(GLWall *wall)
 {
-			DrawDecal(wall, decal);
-			decal = decal->WallNext;
-		}
-
-		if (wall->lightlist != nullptr)
+	mDrawer->SetFog(wall->lightlevel, wall->rellight + getExtraLight(), &wall->Colormap, false);
+	for (auto gldecal : decals[1])
 	{
-			gl_RenderState.EnableSplit(false);
+		if (gldecal->wall == wall)
+		{
+			DrawDecal(gldecal);
 		}
 	}
 }

src/gl/scene/gl_drawinfo.cpp

@@ -867,19 +867,6 @@ void GLDrawList::DrawFlats(int pass)
 	RenderFlat.Unclock();
 }
 
-//==========================================================================
-//
-//
-//
-//==========================================================================
-void GLDrawList::DrawDecals()
-{
-	for(unsigned i=0;i<drawitems.Size();i++)
-	{
-		gl_drawinfo->DoDrawDecals(walls[drawitems[i].index]);
-	}
-}
-
 //==========================================================================
 //
 // Sorting the drawitems first by texture and then by light level.
@@ -952,7 +939,6 @@ GLSprite *GLDrawList::NewSprite()
 	return sprite;
 }
 
-
 //==========================================================================
 //
 // Try to reuse the lists as often as possible as they contain resources that
@@ -1033,6 +1019,8 @@ void FDrawInfo::StartScene()
 	{
 		for (int i = 0; i < GLLDL_TYPES; i++) dldrawlists[i].Reset();
 	}
+	decals[0].Clear();
+	decals[1].Clear();
 }
 
 //==========================================================================
@@ -1323,3 +1311,11 @@ std::pair<FFlatVertex *, unsigned int> FDrawInfo::AllocVertices(unsigned int cou
 	auto p = GLRenderer->mVBO->Alloc(count, &index);
 	return std::make_pair(p, index);
 }
+
+GLDecal *FDrawInfo::AddDecal(bool onmirror)
+{
+	auto decal = (GLDecal*)RenderDataAllocator.Alloc(sizeof(GLDecal));
+	decals[onmirror ? 1 : 0].Push(decal);
+	return decal;
+}
+

src/gl/scene/gl_drawinfo.h

@@ -158,7 +158,6 @@ public:
 	void Draw(int pass, bool trans = false);
 	void DrawWalls(int pass);
 	void DrawFlats(int pass);
-	void DrawDecals();
 	
 	GLDrawList * next;
 } ;
@@ -172,6 +171,7 @@ struct FDrawInfo : public HWDrawInfo
 	
 	FDrawInfo * next;
 	GLDrawList drawlists[GLDL_TYPES];
+	TArray<GLDecal *> decals[2];	// the second slot is for mirrors which get rendered in a separate pass.
 	GLDrawList *dldrawlists = NULL;	// only gets allocated when needed.
 	
 	FDrawInfo();
@@ -179,6 +179,7 @@ struct FDrawInfo : public HWDrawInfo
 	
 	void AddWall(GLWall *wall) override;
     void AddMirrorSurface(GLWall *w) override;
+	GLDecal *AddDecal(bool onmirror) override;
 	void AddPortal(GLWall *w, int portaltype) override;
 
     void ProcessActorsInPortal(FLinePortalSpan *glport) override;
@@ -189,9 +190,9 @@ struct FDrawInfo : public HWDrawInfo
 	void RenderFogBoundaryCompat(GLWall *wall);
 	void RenderLightsCompat(GLWall *wall, int pass);
 
-	void DrawDecal(GLWall *wall, DBaseDecal *decal);
-	void DoDrawDecals(GLWall *wall);
-
+	void DrawDecal(GLDecal *gldecal);
+	void DrawDecals();
+	void DrawDecalsForMirror(GLWall *wall);
 
 	void StartScene();
 	void SetupFloodStencil(wallseg * ws);

src/gl/scene/gl_scene.cpp

@@ -375,15 +375,7 @@ void GLSceneDrawer::RenderScene(int recursion)
 	glEnable(GL_POLYGON_OFFSET_FILL);
 	glPolygonOffset(-1.0f, -128.0f);
 	glDepthMask(false);
-
-	// this is the only geometry type on which decals can possibly appear
-	gl_drawinfo->drawlists[GLDL_PLAINWALLS].DrawDecals();
-	if (gl.legacyMode)
-	{
-		// also process the render lists with walls and dynamic lights
-        gl_drawinfo->dldrawlists[GLLDL_WALLS_PLAIN].DrawDecals();
-        gl_drawinfo->dldrawlists[GLLDL_WALLS_FOG].DrawDecals();
-	}
+	gl_drawinfo->DrawDecals();
 
 	gl_RenderState.SetTextureMode(TM_MODULATE);
 
@@ -434,9 +426,10 @@ void GLSceneDrawer::RenderTranslucent()
 	gl_drawinfo->drawlists[GLDL_TRANSLUCENT].DrawSorted();
 	gl_RenderState.EnableBrightmap(false);
 
-	glDepthMask(true);
 
 	gl_RenderState.AlphaFunc(GL_GEQUAL, 0.5f);
+	glDepthMask(true);
+
 	RenderAll.Unclock();
 }
 

src/gl/scene/gl_walls_draw.cpp

@@ -139,13 +139,14 @@ void FDrawInfo::RenderMirrorSurface(GLWall *wall)
 	glDepthFunc(GL_LESS);
 
 	// This is drawn in the translucent pass which is done after the decal pass
-	// As a result the decals have to be drawn here.
+	// As a result the decals have to be drawn here, right after the wall they are on,
+	// because the depth buffer won't get set by translucent items.
 	if (wall->seg->sidedef->AttachedDecals)
 	{
 		glEnable(GL_POLYGON_OFFSET_FILL);
 		glPolygonOffset(-1.0f, -128.0f);
 		glDepthMask(false);
-		gl_drawinfo->DoDrawDecals(wall);
+		gl_drawinfo->DrawDecalsForMirror(wall);
 		glDepthMask(true);
 		glPolygonOffset(0.0f, 0.0f);
 		glDisable(GL_POLYGON_OFFSET_FILL);

src/hwrenderer/scene/hw_drawinfo.h

@@ -128,7 +128,7 @@ public:
     virtual void AddWall(GLWall *w) = 0;
 	virtual void AddPortal(GLWall *w, int portaltype) = 0;
     virtual void AddMirrorSurface(GLWall *w) = 0;
-    virtual void AddDecal(GLDecal *d) = 0;
+    virtual GLDecal *AddDecal(bool onmirror) = 0;
     virtual void ProcessActorsInPortal(FLinePortalSpan *glport) = 0;
 	virtual std::pair<FFlatVertex *, unsigned int> AllocVertices(unsigned int count) = 0;
 

src/hwrenderer/scene/hw_drawstructs.h

@@ -281,6 +281,32 @@ public:
 
 };
 
+
+
+
+struct DecalVertex
+{
+	float x, y, z;
+	float u, v;
+};
+
+struct GLDecal
+{
+	FMaterial *gltexture;
+	GLWall *wall;
+	DBaseDecal *decal;
+	DecalVertex dv[4];
+	float zcenter;
+	unsigned int vertindex;
+
+	int light;
+	int rel;
+	float a;
+	FColormap colormap;
+
+};
+
+
 inline float Dist2(float x1,float y1,float x2,float y2)
 {
 	return sqrtf((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));

src/hwrenderer/scene/hw_walls.cpp

@@ -29,6 +29,7 @@
 #include "p_maputl.h"
 #include "doomdata.h"
 #include "g_levellocals.h"
+#include "actorinlines.h"
 #include "hwrenderer/dynlights/hw_dynlightdata.h"
 #include "hwrenderer/textures/hw_material.h"
 #include "hwrenderer/utility/hw_cvars.h"

src/hwrenderer/textures/hw_ihwtexture.h

@@ -1,8 +1,10 @@
 #pragma once
 
 #include <stdint.h>
+#include "tarray.h"
 
 typedef TMap<int, bool> SpriteHits;
+class FTexture;
 
 class IHardwareTexture
 {