llvertexbuffer.cpp

	{
		mEmpty = false;
	}
}

//----------------------------------------------------------------------------

template <class T,S32 type> struct VertexBufferStrider
{
	typedef LLStrider<T> strider_t;
	static bool get(LLVertexBuffer& vbo, 
					strider_t& strider, 
					S32 index, S32 count, bool map_range)
	{
		if (type == LLVertexBuffer::TYPE_INDEX)
		{
			volatile U8* ptr = vbo.mapIndexBuffer(index, count, map_range);

			if (ptr == NULL)
			{
				llwarns << "mapIndexBuffer failed!" << llendl;
				return false;
			}

			strider = (T*)ptr;
			strider.setStride(0);
			return true;
		}
		else if (vbo.hasDataType(type))
		{
			S32 stride = LLVertexBuffer::sTypeSize[type];

			volatile U8* ptr = vbo.mapVertexBuffer(type, index, count, map_range);

			if (ptr == NULL)
			{
				llwarns << "mapVertexBuffer failed!" << llendl;
				return false;
			}

			strider = (T*)ptr;
			strider.setStride(stride);
			return true;
		}
		else
		{
			llerrs << "VertexBufferStrider could not find valid vertex data." << llendl;
		}
		return false;
	}
};

bool LLVertexBuffer::getVertexStrider(LLStrider<LLVector3>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<LLVector3,TYPE_VERTEX>::get(*this, strider, index, count, map_range);
}
bool LLVertexBuffer::getVertexStrider(LLStrider<LLVector4a>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<LLVector4a,TYPE_VERTEX>::get(*this, strider, index, count, map_range);
}
bool LLVertexBuffer::getIndexStrider(LLStrider<U16>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<U16,TYPE_INDEX>::get(*this, strider, index, count, map_range);
}
bool LLVertexBuffer::getTexCoord0Strider(LLStrider<LLVector2>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<LLVector2,TYPE_TEXCOORD0>::get(*this, strider, index, count, map_range);
}
bool LLVertexBuffer::getTexCoord1Strider(LLStrider<LLVector2>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<LLVector2,TYPE_TEXCOORD1>::get(*this, strider, index, count, map_range);
}
bool LLVertexBuffer::getTexCoord2Strider(LLStrider<LLVector2>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<LLVector2,TYPE_TEXCOORD2>::get(*this, strider, index, count, map_range);
}
bool LLVertexBuffer::getNormalStrider(LLStrider<LLVector3>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<LLVector3,TYPE_NORMAL>::get(*this, strider, index, count, map_range);
}
bool LLVertexBuffer::getTangentStrider(LLStrider<LLVector3>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<LLVector3,TYPE_TANGENT>::get(*this, strider, index, count, map_range);
}
bool LLVertexBuffer::getTangentStrider(LLStrider<LLVector4a>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<LLVector4a,TYPE_TANGENT>::get(*this, strider, index, count, map_range);
}
bool LLVertexBuffer::getColorStrider(LLStrider<LLColor4U>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<LLColor4U,TYPE_COLOR>::get(*this, strider, index, count, map_range);
}
bool LLVertexBuffer::getEmissiveStrider(LLStrider<LLColor4U>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<LLColor4U,TYPE_EMISSIVE>::get(*this, strider, index, count, map_range);
}
bool LLVertexBuffer::getWeightStrider(LLStrider<F32>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<F32,TYPE_WEIGHT>::get(*this, strider, index, count, map_range);
}

bool LLVertexBuffer::getWeight4Strider(LLStrider<LLVector4>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<LLVector4,TYPE_WEIGHT4>::get(*this, strider, index, count, map_range);
}

bool LLVertexBuffer::getClothWeightStrider(LLStrider<LLVector4>& strider, S32 index, S32 count, bool map_range)
{
	return VertexBufferStrider<LLVector4,TYPE_CLOTHWEIGHT>::get(*this, strider, index, count, map_range);
}

//----------------------------------------------------------------------------

static LLFastTimer::DeclareTimer FTM_BIND_GL_ARRAY("Bind Array");
bool LLVertexBuffer::bindGLArray()
{
	if (mGLArray && sGLRenderArray != mGLArray)
	{
		{
			LLFastTimer t(FTM_BIND_GL_ARRAY);
#if GL_ARB_vertex_array_object
			glBindVertexArray(mGLArray);
#endif
			sGLRenderArray = mGLArray;
		}

		//really shouldn't be necessary, but some drivers don't properly restore the
		//state of GL_ELEMENT_ARRAY_BUFFER_BINDING
		bindGLIndices();
		
		return true;
	}
		
	return false;
}

static LLFastTimer::DeclareTimer FTM_BIND_GL_BUFFER("Bind Buffer");

bool LLVertexBuffer::bindGLBuffer(bool force_bind)
{
	bindGLArray();

	bool ret = false;

	if (useVBOs() && (force_bind || (mGLBuffer && (mGLBuffer != sGLRenderBuffer || !sVBOActive))))
	{
		LLFastTimer t(FTM_BIND_GL_BUFFER);
		/*if (sMapped)
		{
			llerrs << "VBO bound while another VBO mapped!" << llendl;
		}*/
		glBindBufferARB(GL_ARRAY_BUFFER_ARB, mGLBuffer);
		sGLRenderBuffer = mGLBuffer;
		sBindCount++;
		sVBOActive = true;

		if (mGLArray)
		{
			llassert(sGLRenderArray == mGLArray);
			//mCachedRenderBuffer = mGLBuffer;
		}

		ret = true;
	}

	return ret;
}

static LLFastTimer::DeclareTimer FTM_BIND_GL_INDICES("Bind Indices");

bool LLVertexBuffer::bindGLIndices(bool force_bind)
{
	bindGLArray();

	bool ret = false;
	if (useVBOs() && (force_bind || (mGLIndices && (mGLIndices != sGLRenderIndices || !sIBOActive))))
	{
		LLFastTimer t(FTM_BIND_GL_INDICES);
		/*if (sMapped)
		{
			llerrs << "VBO bound while another VBO mapped!" << llendl;
		}*/
		glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, mGLIndices);
		sGLRenderIndices = mGLIndices;
		stop_glerror();
		sBindCount++;
		sIBOActive = true;
		ret = true;
	}

	return ret;
}

void LLVertexBuffer::flush()
{
	if (useVBOs())
	{
		unmapBuffer();
	}
}

// bind for transform feedback (quick 'n dirty)
void LLVertexBuffer::bindForFeedback(U32 channel, U32 type, U32 index, U32 count)
{
#ifdef GL_TRANSFORM_FEEDBACK_BUFFER
	U32 offset = mOffsets[type] + sTypeSize[type]*index;
	U32 size= (sTypeSize[type]*count);
	glBindBufferRange(GL_TRANSFORM_FEEDBACK_BUFFER, channel, mGLBuffer, offset, size);
#endif
}

// Set for rendering
void LLVertexBuffer::setBuffer(U32 data_mask)
{
	flush();

	//set up pointers if the data mask is different ...
	bool setup = (sLastMask != data_mask);

	if (gDebugGL && data_mask != 0)
	{ //make sure data requirements are fulfilled
		LLGLSLShader* shader = LLGLSLShader::sCurBoundShaderPtr;
		if (shader)
		{
			U32 required_mask = 0;
			for (U32 i = 0; i < LLVertexBuffer::TYPE_TEXTURE_INDEX; ++i)
			{
				if (shader->getAttribLocation(i) > -1)
				{
					U32 required = 1 << i;
					if ((data_mask & required) == 0)
					{
						llwarns << "Missing attribute: " << LLShaderMgr::instance()->mReservedAttribs[i] << llendl;
					}

					required_mask |= required;
				}
			}

			if ((data_mask & required_mask) != required_mask)
			{
				llwarns << "Shader consumption mismatches data provision." << llendl;
			}
		}
	}

	if (useVBOs())
	{
		if (mGLArray)
		{
			bindGLArray();
			setup = false; //do NOT perform pointer setup if using VAO
		}
		else
		{
			const bool bindBuffer = bindGLBuffer();
			const bool bindIndices = bindGLIndices();
			
			setup = setup || bindBuffer || bindIndices;
		}

		if (gDebugGL && !mGLArray)
		{
			GLint buff;
			glGetIntegerv(GL_ARRAY_BUFFER_BINDING_ARB, &buff);
			if ((GLuint)buff != mGLBuffer)
			{
				if (gDebugSession)
				{
					gFailLog << "Invalid GL vertex buffer bound: " << buff << std::endl;
				}
				else
				{
					llerrs << "Invalid GL vertex buffer bound: " << buff << llendl;
				}
			}

			if (mGLIndices)
			{
				glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING_ARB, &buff);
				if ((GLuint)buff != mGLIndices)
				{
					if (gDebugSession)
					{
						gFailLog << "Invalid GL index buffer bound: " << buff <<  std::endl;
					}
					else
					{
						llerrs << "Invalid GL index buffer bound: " << buff << llendl;
					}
				}
			}
		}

		
	}
	else
	{	
		if (sGLRenderArray)
		{
#if GL_ARB_vertex_array_object
			glBindVertexArray(0);
#endif
			sGLRenderArray = 0;
			sGLRenderIndices = 0;
			sIBOActive = false;
		}

		if (mGLBuffer)
		{
			if (sVBOActive)
			{
				glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
				sBindCount++;
				sVBOActive = false;
				setup = true; // ... or a VBO is deactivated
			}
			if (sGLRenderBuffer != mGLBuffer)
			{
				sGLRenderBuffer = mGLBuffer;
				setup = true; // ... or a client memory pointer changed
			}
		}
		if (mGLIndices)
		{
			if (sIBOActive)
			{
				glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
				sBindCount++;
				sIBOActive = false;
			}
			
			sGLRenderIndices = mGLIndices;
		}
	}

	if (!mGLArray)
	{
		setupClientArrays(data_mask);
	}
			
	if (mGLBuffer)
	{
		if (data_mask && setup)
		{
			setupVertexBuffer(data_mask); // subclass specific setup (virtual function)
			sSetCount++;
		}
	}
}

// virtual (default)
void LLVertexBuffer::setupVertexBuffer(U32 data_mask)
{
	stop_glerror();
	volatile U8* base = useVBOs() ? (U8*) mAlignedOffset : mMappedData;

	if (gDebugGL && ((data_mask & mTypeMask) != data_mask))
	{
		for (U32 i = 0; i < LLVertexBuffer::TYPE_MAX; ++i)
		{
			U32 mask = 1 << i;
			if (mask & data_mask && !(mask & mTypeMask))
			{ //bit set in data_mask, but not set in mTypeMask
				llwarns << "Missing required component " << vb_type_name[i] << llendl;
			}
		}
		llerrs << "LLVertexBuffer::setupVertexBuffer missing required components for supplied data mask." << llendl;
	}

	if (LLGLSLShader::sNoFixedFunction)
	{
		if (data_mask & MAP_NORMAL)
		{
			S32 loc = TYPE_NORMAL;
			void* ptr = (void*)(base + mOffsets[TYPE_NORMAL]);
			glVertexAttribPointerARB(loc, 3, GL_FLOAT, GL_FALSE, LLVertexBuffer::sTypeSize[TYPE_NORMAL], ptr);
		}
		if (data_mask & MAP_TEXCOORD3)
		{
			S32 loc = TYPE_TEXCOORD3;
			void* ptr = (void*)(base + mOffsets[TYPE_TEXCOORD3]);
			glVertexAttribPointerARB(loc,2,GL_FLOAT, GL_FALSE, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD3], ptr);
		}
		if (data_mask & MAP_TEXCOORD2)
		{
			S32 loc = TYPE_TEXCOORD2;
			void* ptr = (void*)(base + mOffsets[TYPE_TEXCOORD2]);
			glVertexAttribPointerARB(loc,2,GL_FLOAT, GL_FALSE, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD2], ptr);
		}
		if (data_mask & MAP_TEXCOORD1)
		{
			S32 loc = TYPE_TEXCOORD1;
			void* ptr = (void*)(base + mOffsets[TYPE_TEXCOORD1]);
			glVertexAttribPointerARB(loc,2,GL_FLOAT, GL_FALSE, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD1], ptr);
		}
		if (data_mask & MAP_TANGENT)
		{
			S32 loc = TYPE_TANGENT;
			void* ptr = (void*)(base + mOffsets[TYPE_TANGENT]);
			glVertexAttribPointerARB(loc, 4,GL_FLOAT, GL_FALSE, LLVertexBuffer::sTypeSize[TYPE_TANGENT], ptr);
		}
		if (data_mask & MAP_TEXCOORD0)
		{
			S32 loc = TYPE_TEXCOORD0;
			void* ptr = (void*)(base + mOffsets[TYPE_TEXCOORD0]);
			glVertexAttribPointerARB(loc,2,GL_FLOAT, GL_FALSE, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD0], ptr);
		}
		if (data_mask & MAP_COLOR)
		{
			S32 loc = TYPE_COLOR;
			void* ptr = (void*)(base + mOffsets[TYPE_COLOR]);
			glVertexAttribPointerARB(loc, 4, GL_UNSIGNED_BYTE, GL_TRUE, LLVertexBuffer::sTypeSize[TYPE_COLOR], ptr);
		}
		if (data_mask & MAP_EMISSIVE)
		{
			S32 loc = TYPE_EMISSIVE;
			void* ptr = (void*)(base + mOffsets[TYPE_EMISSIVE]);
			glVertexAttribPointerARB(loc, 4, GL_UNSIGNED_BYTE, GL_TRUE, LLVertexBuffer::sTypeSize[TYPE_EMISSIVE], ptr);
		}
		if (data_mask & MAP_WEIGHT)
		{
			S32 loc = TYPE_WEIGHT;
			void* ptr = (void*)(base + mOffsets[TYPE_WEIGHT]);
			glVertexAttribPointerARB(loc, 1, GL_FLOAT, GL_FALSE, LLVertexBuffer::sTypeSize[TYPE_WEIGHT], ptr);
		}
		if (data_mask & MAP_WEIGHT4)
		{
			S32 loc = TYPE_WEIGHT4;
			void* ptr = (void*)(base+mOffsets[TYPE_WEIGHT4]);
			glVertexAttribPointerARB(loc, 4, GL_FLOAT, GL_FALSE, LLVertexBuffer::sTypeSize[TYPE_WEIGHT4], ptr);
		}
		if (data_mask & MAP_CLOTHWEIGHT)
		{
			S32 loc = TYPE_CLOTHWEIGHT;
			void* ptr = (void*)(base + mOffsets[TYPE_CLOTHWEIGHT]);
			glVertexAttribPointerARB(loc, 4, GL_FLOAT, GL_TRUE,  LLVertexBuffer::sTypeSize[TYPE_CLOTHWEIGHT], ptr);
		}
		if (data_mask & MAP_TEXTURE_INDEX && 
				(gGLManager.mGLSLVersionMajor >= 2 || gGLManager.mGLSLVersionMinor >= 30)) //indexed texture rendering requires GLSL 1.30 or later
		{
#if !LL_DARWIN
			S32 loc = TYPE_TEXTURE_INDEX;
			void *ptr = (void*) (base + mOffsets[TYPE_VERTEX] + 12);
			glVertexAttribIPointer(loc, 1, GL_UNSIGNED_INT, LLVertexBuffer::sTypeSize[TYPE_VERTEX], ptr);
#endif
		}
		if (data_mask & MAP_VERTEX)
		{
			S32 loc = TYPE_VERTEX;
			void* ptr = (void*)(base + mOffsets[TYPE_VERTEX]);
			glVertexAttribPointerARB(loc, 3,GL_FLOAT, GL_FALSE, LLVertexBuffer::sTypeSize[TYPE_VERTEX], ptr);
		}	
	}	
	else
	{
		if (data_mask & MAP_NORMAL)
		{
			glNormalPointer(GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_NORMAL], (void*)(base + mOffsets[TYPE_NORMAL]));
		}
		if (data_mask & MAP_TEXCOORD3)
		{
			glClientActiveTextureARB(GL_TEXTURE3_ARB);
			glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD3], (void*)(base + mOffsets[TYPE_TEXCOORD3]));
			glClientActiveTextureARB(GL_TEXTURE0_ARB);
		}
		if (data_mask & MAP_TEXCOORD2)
		{
			glClientActiveTextureARB(GL_TEXTURE2_ARB);
			glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD2], (void*)(base + mOffsets[TYPE_TEXCOORD2]));
			glClientActiveTextureARB(GL_TEXTURE0_ARB);
		}
		if (data_mask & MAP_TEXCOORD1)
		{
			glClientActiveTextureARB(GL_TEXTURE1_ARB);
			glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD1], (void*)(base + mOffsets[TYPE_TEXCOORD1]));
			glClientActiveTextureARB(GL_TEXTURE0_ARB);
		}
		if (data_mask & MAP_TANGENT)
		{
			glClientActiveTextureARB(GL_TEXTURE2_ARB);
			glTexCoordPointer(4,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TANGENT], (void*)(base + mOffsets[TYPE_TANGENT]));
			glClientActiveTextureARB(GL_TEXTURE0_ARB);
		}
		if (data_mask & MAP_TEXCOORD0)
		{
			glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD0], (void*)(base + mOffsets[TYPE_TEXCOORD0]));
		}
		if (data_mask & MAP_COLOR)
		{
			glColorPointer(4, GL_UNSIGNED_BYTE, LLVertexBuffer::sTypeSize[TYPE_COLOR], (void*)(base + mOffsets[TYPE_COLOR]));
		}
		if (data_mask & MAP_VERTEX)
		{
			glVertexPointer(3,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_VERTEX], (void*)(base + 0));
		}	
	}

	llglassertok();
}

LLVertexBuffer::MappedRegion::MappedRegion(S32 type, S32 index, S32 count)
: mType(type), mIndex(index), mCount(count)
{ 
	llassert(mType == LLVertexBuffer::TYPE_INDEX || 
			mType < LLVertexBuffer::TYPE_TEXTURE_INDEX);
}