- base the viewpoint buffer on IDataBuffer.

src/gl/data/gl_viewpointbuffer.cpp

@@ -29,17 +29,18 @@
 #include "gl_load/gl_interface.h"
 #include "hwrenderer/data/shaderuniforms.h"
 #include "hwrenderer/scene/hw_viewpointuniforms.h"
+#include "hwrenderer/scene/hw_drawinfo.h"
 #include "gl_viewpointbuffer.h"
 
 static const int INITIAL_BUFFER_SIZE = 100;	// 100 viewpoints per frame should nearly always be enough
 
 GLViewpointBuffer::GLViewpointBuffer()
 {
-	mPersistent = screen->BuffersArePersistent();
 	mBufferSize = INITIAL_BUFFER_SIZE;
-	mBlockAlign = ((sizeof(HWViewpointUniforms) / gl.uniformblockalignment) + 1) * gl.uniformblockalignment;
+	mBlockAlign = ((sizeof(HWViewpointUniforms) / screen->uniformblockalignment) + 1) * screen->uniformblockalignment;
 	mByteSize = mBufferSize * mBlockAlign;
-	Allocate();
+	mBuffer = screen->CreateDataBuffer(VIEWPOINT_BINDINGPOINT, false);
+	mBuffer->SetData(mByteSize, nullptr, false);
 	Clear();
 	mLastMappedIndex = UINT_MAX;
 	mClipPlaneInfo.Push(0);
@@ -47,98 +48,32 @@ GLViewpointBuffer::GLViewpointBuffer()
 
 GLViewpointBuffer::~GLViewpointBuffer()
 {
-	glBindBuffer(GL_UNIFORM_BUFFER, 0);
-	glDeleteBuffers(1, &mBufferId);
+	delete mBuffer;
 }
 
-void GLViewpointBuffer::Allocate()
-{
-	glGenBuffers(1, &mBufferId);
-	glBindBufferBase(GL_UNIFORM_BUFFER, VIEWPOINT_BINDINGPOINT, mBufferId);
-	glBindBuffer(GL_UNIFORM_BUFFER, mBufferId);	// Note: Some older AMD drivers don't do that in glBindBufferBase, as they should.
-	if (mPersistent)
-	{
-		glBufferStorage(GL_UNIFORM_BUFFER, mByteSize, NULL, GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT);
-		mBufferPointer = glMapBufferRange(GL_UNIFORM_BUFFER, 0, mByteSize, GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT);
-	}
-	else
-	{
-		glBufferData(GL_UNIFORM_BUFFER, mByteSize, NULL, GL_STATIC_DRAW);
-		mBufferPointer = NULL;
-	}
-}
 
 void GLViewpointBuffer::CheckSize()
 {
 	if (mUploadIndex >= mBufferSize)
 	{
-		// reallocate the buffer with twice the size
-		unsigned int oldbuffer = mBufferId;
-
 		mBufferSize *= 2;
 		mByteSize *= 2;
-		
-		// first unmap the old buffer
-		glBindBuffer(GL_UNIFORM_BUFFER, mBufferId);
-		glUnmapBuffer(GL_UNIFORM_BUFFER);
-		
-		Allocate();
-		glBindBuffer(GL_COPY_READ_BUFFER, oldbuffer);
-
-		// copy contents and delete the old buffer.
-		glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_UNIFORM_BUFFER, 0, 0, mByteSize / 2);	// old size is half of the current one.
-		glBindBuffer(GL_COPY_READ_BUFFER, 0);
-		glDeleteBuffers(1, &oldbuffer);
+		mBuffer->Resize(mByteSize);
 	}
 }
 
-void GLViewpointBuffer::Map()
-{
-	if (!mPersistent)
-	{
-		glBindBuffer(GL_UNIFORM_BUFFER, mBufferId);
-		mBufferPointer = (float*)glMapBufferRange(GL_UNIFORM_BUFFER, 0, mByteSize, GL_MAP_WRITE_BIT);
-	}
-}
-
-void GLViewpointBuffer::Unmap()
-{
-	if (!mPersistent)
-	{
-		glBindBuffer(GL_UNIFORM_BUFFER, mBufferId);
-		glUnmapBuffer(GL_UNIFORM_BUFFER);
-		mBufferPointer = nullptr;
-	}
-	else
-	{
-		glMemoryBarrier(GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
-	}
-}
-
-int GLViewpointBuffer::Bind(unsigned int index)
+int GLViewpointBuffer::Bind(HWDrawInfo *di, unsigned int index)
 {
 	if (index != mLastMappedIndex)
 	{
 		mLastMappedIndex = index;
-		glBindBufferRange(GL_UNIFORM_BUFFER, VIEWPOINT_BINDINGPOINT, mBufferId, index * mBlockAlign, mBlockAlign);
-
-		// Update the viewpoint-related clip plane setting.
-		if (!(gl.flags & RFL_NO_CLIP_PLANES))
-		{
-			if (mClipPlaneInfo[index])
-			{
-				glEnable(GL_CLIP_DISTANCE0);
-			}
-			else
-			{
-				glDisable(GL_CLIP_DISTANCE0);
-			}
-		}
+		mBuffer->BindRange(index * mBlockAlign, mBlockAlign);
+		di->EnableClipDistance(0, mClipPlaneInfo[index]);
 	}
 	return index;
 }
 
-void GLViewpointBuffer::Set2D(int width, int height)
+void GLViewpointBuffer::Set2D(HWDrawInfo *di, int width, int height)
 {
 	if (width != m2DWidth || height != m2DHeight)
 	{
@@ -146,25 +81,25 @@ void GLViewpointBuffer::Set2D(int width, int height)
 		matrices.SetDefaults();
 		matrices.mProjectionMatrix.ortho(0, width, height, 0, -1.0f, 1.0f);
 		matrices.CalcDependencies();
-		Map();
-		memcpy(mBufferPointer, &matrices, sizeof(matrices));
-		Unmap();
+		mBuffer->Map();
+		memcpy(mBuffer->Memory(), &matrices, sizeof(matrices));
+		mBuffer->Unmap();
 		m2DWidth = width;
 		m2DHeight = height;
 		mLastMappedIndex = -1;
 	}
-	Bind(0);
+	Bind(di, 0);
 }
 
-int GLViewpointBuffer::SetViewpoint(HWViewpointUniforms *vp)
+int GLViewpointBuffer::SetViewpoint(HWDrawInfo *di, HWViewpointUniforms *vp)
 {
 	CheckSize();
-	Map();
-	memcpy(((char*)mBufferPointer) + mUploadIndex * mBlockAlign, vp, sizeof(*vp));
-	Unmap();
+	mBuffer->Map();
+	memcpy(((char*)mBuffer->Memory()) + mUploadIndex * mBlockAlign, vp, sizeof(*vp));
+	mBuffer->Unmap();
 
 	mClipPlaneInfo.Push(vp->mClipHeightDirection != 0.f || vp->mClipLine.X > -10000000.0f);
-	return Bind(mUploadIndex++);
+	return Bind(di, mUploadIndex++);
 }
 
 void GLViewpointBuffer::Clear()

src/gl/data/gl_viewpointbuffer.h

@@ -1,37 +1,35 @@
 
 #include "tarray.h"
+#include "hwrenderer/data/buffers.h"
 
 struct HWViewpointUniforms;
+struct HWDrawInfo;
 
 class GLViewpointBuffer
 {
-	unsigned int mBufferId;
+	IDataBuffer *mBuffer;
+
 	unsigned int mBufferSize;
 	unsigned int mBlockAlign;
 	unsigned int mUploadIndex;
 	unsigned int mLastMappedIndex;
 	unsigned int mByteSize;
-	void * mBufferPointer;
 	TArray<bool> mClipPlaneInfo;
-	bool mPersistent;
 	
 	unsigned int m2DWidth = ~0u, m2DHeight = ~0u;
 
 	unsigned int mBlockSize;
 
 	void CheckSize();
-	void Allocate();
 
 public:
 
 	GLViewpointBuffer();
 	~GLViewpointBuffer();
 	void Clear();
-	void Map();
-	void Unmap();
-	int Bind(unsigned int index);
-	void Set2D(int width, int height);
-	int SetViewpoint(HWViewpointUniforms *vp);
+	int Bind(HWDrawInfo *di, unsigned int index);
+	void Set2D(HWDrawInfo *di, int width, int height);
+	int SetViewpoint(HWDrawInfo *di, HWViewpointUniforms *vp);
 	unsigned int GetBlockSize() const { return mBlockSize; }
 };
 

src/gl/renderer/gl_renderer.cpp

@@ -418,9 +418,11 @@ void FGLRenderer::Draw2D(F2DDrawer *drawer)
 	FGLDebug::PushGroup("Draw2D");
 	if (VRMode::GetVRMode(true)->mEyeCount == 1)
 		mBuffers->BindCurrentFB();
+
+	FDrawInfo di;	// For access to the virtual interface. This should be placed elsewhere...
 	const auto &mScreenViewport = screen->mScreenViewport;
 	glViewport(mScreenViewport.left, mScreenViewport.top, mScreenViewport.width, mScreenViewport.height);
-	GLRenderer->mViewpoints->Set2D(screen->GetWidth(), screen->GetHeight());
+	GLRenderer->mViewpoints->Set2D(&di, screen->GetWidth(), screen->GetHeight());
 
 	glDisable(GL_DEPTH_TEST);
 

src/gl/scene/gl_drawinfo.cpp

@@ -263,7 +263,7 @@ void FDrawInfo::RenderPortal(HWPortal *p, bool usestencil)
 	gp->DrawContents(new_di, gl_RenderState);
 	new_di->EndDrawInfo();
 	GLRenderer->mVBO->Bind(gl_RenderState);
-	GLRenderer->mViewpoints->Bind(vpIndex);
+	GLRenderer->mViewpoints->Bind(this, vpIndex);
 	gp->RemoveStencil(this, gl_RenderState, usestencil);
 
 }
@@ -320,6 +320,21 @@ void FDrawInfo::SetCulling(int mode)
 	}
 }
 
+void FDrawInfo::EnableClipDistance(int num, bool state)
+{
+	// Update the viewpoint-related clip plane setting.
+	if (!(gl.flags & RFL_NO_CLIP_PLANES))
+	{
+		if (state)
+		{
+			glEnable(GL_CLIP_DISTANCE0+num);
+		}
+		else
+		{
+			glDisable(GL_CLIP_DISTANCE0+num);
+		}
+	}
+}
 
 //==========================================================================
 //
@@ -330,7 +345,7 @@ void FDrawInfo::ClearScreen()
 {
 	bool multi = !!glIsEnabled(GL_MULTISAMPLE);
 
-	GLRenderer->mViewpoints->Set2D(SCREENWIDTH, SCREENHEIGHT);
+	GLRenderer->mViewpoints->Set2D(this, SCREENWIDTH, SCREENHEIGHT);
 	gl_RenderState.SetColor(0, 0, 0);
 	gl_RenderState.Apply();
 

src/gl/scene/gl_drawinfo.h

@@ -54,12 +54,12 @@ struct FDrawInfo : public HWDrawInfo
 	void EnableDrawBufferAttachments(bool on) override;
 	void SetStencil(int offs, int op, int flags) override;
 	void SetCulling(int mode) override;
+	void EnableClipDistance(int num, bool state) override;
 
 	void StartScene();
 
 	void DrawSorted(int listindex);
 
-	// These two may be moved to the API independent part of the renderer later.
 	void AddSubsectorToPortal(FSectorPortalGroup *portal, subsector_t *sub) override;
     
     void CreateScene();
@@ -74,16 +74,5 @@ struct FDrawInfo : public HWDrawInfo
 
 	static FDrawInfo *StartDrawInfo(FRenderViewpoint &parentvp, HWViewpointUniforms *uniforms);
 	FDrawInfo *EndDrawInfo();
-	
-	void SetColor(int light, int rellight, const FColormap &cm, float alpha, bool weapon = false)
-	{
-		gl_RenderState.SetColor(light, rellight, isFullbrightScene(), cm, alpha, weapon);
-	}
-
-	void SetFog(int lightlevel, int rellight, const FColormap *cmap, bool isadditive)
-	{
-		gl_RenderState.SetFog(lightlevel, rellight, isFullbrightScene(), cmap, isadditive);
-	}
-
 };
 #endif

src/gl/scene/gl_scene.cpp

@@ -78,7 +78,7 @@ EXTERN_CVAR (Bool, r_drawvoxels)
 void FDrawInfo::ApplyVPUniforms()
 {
 	VPUniforms.CalcDependencies();
-	vpIndex = GLRenderer->mViewpoints->SetViewpoint(&VPUniforms);
+	vpIndex = GLRenderer->mViewpoints->SetViewpoint(this, &VPUniforms);
 }
 
 
@@ -280,7 +280,7 @@ void FDrawInfo::DrawScene(int drawmode)
 		GLRenderer->mBuffers->BindSceneFB(true);
 		gl_RenderState.EnableDrawBuffers(gl_RenderState.GetPassDrawBufferCount());
 		gl_RenderState.Apply();
-		GLRenderer->mViewpoints->Bind(vpIndex);
+		GLRenderer->mViewpoints->Bind(this, vpIndex);
 	}
 
 	// Handle all portals after rendering the opaque objects but before
@@ -329,7 +329,7 @@ void FDrawInfo::DrawEndScene2D(sector_t * viewsector)
 	HWViewpointUniforms vp = VPUniforms;
 	vp.mViewMatrix.loadIdentity();
 	vp.mProjectionMatrix = vrmode->GetHUDSpriteProjection();
-	GLRenderer->mViewpoints->SetViewpoint(&vp);
+	GLRenderer->mViewpoints->SetViewpoint(this, &vp);
 	glDisable(GL_DEPTH_TEST);
 	glDisable(GL_MULTISAMPLE);
 

src/gl/system/gl_framebuffer.cpp

@@ -112,6 +112,7 @@ void OpenGLFrameBuffer::InitializeState()
 	// Move some state to the framebuffer object for easier access.
 	hwcaps = gl.flags;
 	glslversion = gl.glslversion;
+	uniformblockalignment = gl.uniformblockalignment;
 
 	if (first)
 	{

src/hwrenderer/scene/hw_drawinfo.h

@@ -362,6 +362,7 @@ public:
 	virtual void EnableDrawBufferAttachments(bool on) = 0;
 	virtual void SetStencil(int offs, int op, int flags) = 0;
 	virtual void SetCulling(int mode) = 0;
+	virtual void EnableClipDistance(int num, bool state) = 0;
 
 
 };

src/v_video.h

@@ -365,11 +365,13 @@ protected:
 	PalEntry SourcePalette[256];		// This is where unpaletted textures get their palette from
 
 public:
-	int hwcaps = 0;
+	// Hardware render state that needs to be exposed to the API independent part of the renderer. For ease of access this is stored in the base class.
+	int hwcaps = 0;								// Capability flags
 	float glslversion = 0;						// This is here so that the differences between old OpenGL and new OpenGL/Vulkan can be handled by platform independent code.
 	int instack[2] = { 0,0 };					// this is globally maintained state for portal recursion avoidance.
 	int stencilValue = 0;						// Global stencil test value
-	bool enable_quadbuffered = false;
+	bool enable_quadbuffered = false;			// Quad-buffered stereo available?
+	unsigned int uniformblockalignment = 256;	// Hardware dependent uniform buffer alignment.
 	FPortalSceneState *mPortalState;			// global portal state.
 	FSkyVertexBuffer *mSkyData;					// we need access to this in the device independent part, but cannot depend on how the renderer manages it internally.