Method CreateBufferObject

src/engine/client/graphics_threaded.cpp:1936–1997

}

int CGraphics_Threaded::CreateBufferObject(size_t UploadDataSize, void *pUploadData, int CreateFlags, bool IsMovedPointer)
{
	int Index = -1;
	if(m_FirstFreeBufferObjectIndex == -1)
	{
		Index = m_vBufferObjectIndices.size();
		m_vBufferObjectIndices.push_back(Index);
	}
	else
	{
		Index = m_FirstFreeBufferObjectIndex;
		m_FirstFreeBufferObjectIndex = m_vBufferObjectIndices[Index];
		m_vBufferObjectIndices[Index] = Index;
	}

	dbg_assert((CreateFlags & EBufferObjectCreateFlags::BUFFER_OBJECT_CREATE_FLAGS_ONE_TIME_USE_BIT) == 0 || (UploadDataSize <= CCommandBuffer::MAX_VERTICES * maximum(sizeof(CCommandBuffer::SVertexTex3DStream), sizeof(CCommandBuffer::SVertexTex3D))),
		"If BUFFER_OBJECT_CREATE_FLAGS_ONE_TIME_USE_BIT is used, then the buffer size must not exceed max(sizeof(CCommandBuffer::SVertexTex3DStream), sizeof(CCommandBuffer::SVertexTex3D)) * CCommandBuffer::MAX_VERTICES");

	CCommandBuffer::SCommand_CreateBufferObject Cmd;
	Cmd.m_BufferIndex = Index;
	Cmd.m_DataSize = UploadDataSize;
	Cmd.m_DeletePointer = IsMovedPointer;
	Cmd.m_Flags = CreateFlags;

	if(IsMovedPointer)
	{
		Cmd.m_pUploadData = pUploadData;
		AddCmd(Cmd);
	}
	else
	{
		if(UploadDataSize <= CMD_BUFFER_DATA_BUFFER_SIZE)
		{
			Cmd.m_pUploadData = AllocCommandBufferData(UploadDataSize);

			AddCmd(Cmd, [&] {
				Cmd.m_pUploadData = m_pCommandBuffer->AllocData(UploadDataSize);
				return Cmd.m_pUploadData != nullptr;
			});
			mem_copy(Cmd.m_pUploadData, pUploadData, UploadDataSize);
		}
		else
		{
			Cmd.m_pUploadData = nullptr;
			AddCmd(Cmd);

			// update the buffer instead
			size_t UploadDataOffset = 0;
			while(UploadDataSize > 0)
			{
				size_t UpdateSize = (UploadDataSize > CMD_BUFFER_DATA_BUFFER_SIZE ? CMD_BUFFER_DATA_BUFFER_SIZE : UploadDataSize);

				UpdateBufferObjectInternal(Index, UpdateSize, (((char *)pUploadData) + UploadDataOffset), (void *)UploadDataOffset);

				UploadDataOffset += UpdateSize;
				UploadDataSize -= UpdateSize;
			}
		}