forked from 0ad/0ad
vladislavbelov
62e589ab76
Comments By: phosit, Stan Tested By: Langbart, phosit Differential Revision: https://code.wildfiregames.com/D4636 This was SVN commit r26858.
114 lines
3.2 KiB
C++
114 lines
3.2 KiB
C++
/* Copyright (C) 2022 Wildfire Games.
|
|
* This file is part of 0 A.D.
|
|
*
|
|
* 0 A.D. is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 0 A.D. is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/*
|
|
* Allocate and destroy CVertexBuffers
|
|
*/
|
|
|
|
#ifndef INCLUDED_VERTEXBUFFERMANAGER
|
|
#define INCLUDED_VERTEXBUFFERMANAGER
|
|
|
|
#include "lib/types.h"
|
|
#include "renderer/VertexBuffer.h"
|
|
|
|
#include <memory>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
// CVertexBufferManager: owner object for CVertexBuffer objects; acts as
|
|
// 'front end' for their allocation and destruction
|
|
class CVertexBufferManager
|
|
{
|
|
public:
|
|
enum class Group : u32
|
|
{
|
|
DEFAULT,
|
|
TERRAIN,
|
|
WATER,
|
|
COUNT
|
|
};
|
|
|
|
// Helper for automatic VBChunk lifetime management.
|
|
class Handle
|
|
{
|
|
public:
|
|
Handle() = default;
|
|
Handle(const Handle&) = delete;
|
|
Handle& operator=(const Handle&) = delete;
|
|
|
|
explicit Handle(CVertexBuffer::VBChunk* chunk);
|
|
Handle(Handle&& other);
|
|
Handle& operator=(Handle&& other);
|
|
|
|
~Handle() { Reset(); }
|
|
|
|
bool IsValid() const { return m_Chunk != nullptr; }
|
|
explicit operator bool() const { return IsValid(); }
|
|
bool operator!() const { return !static_cast<bool>(*this); }
|
|
void Reset();
|
|
|
|
friend void swap(Handle& lhs, Handle& rhs)
|
|
{
|
|
using std::swap;
|
|
|
|
swap(lhs.m_Chunk, rhs.m_Chunk);
|
|
}
|
|
|
|
CVertexBuffer::VBChunk& operator*() const { return *m_Chunk; }
|
|
CVertexBuffer::VBChunk* operator->() const { return m_Chunk; }
|
|
CVertexBuffer::VBChunk* Get() const { return m_Chunk; }
|
|
|
|
private:
|
|
CVertexBuffer::VBChunk* m_Chunk = nullptr;
|
|
};
|
|
|
|
/**
|
|
* Try to allocate a vertex buffer of the given size and type.
|
|
*
|
|
* @param vertexSize size of each vertex in the buffer
|
|
* @param numberOfVertices number of vertices in the buffer
|
|
* @param type buffer type
|
|
* @param dynamic will be buffer updated frequently or not
|
|
* @param backingStore if not dynamic, this is nullptr; else for dynamic,
|
|
* this must be a copy of the vertex data that remains valid for the
|
|
* lifetime of the VBChunk
|
|
* @return chunk, or empty handle if no free chunks available
|
|
*/
|
|
Handle AllocateChunk(
|
|
const size_t vertexSize, const size_t numberOfVertices,
|
|
const Renderer::Backend::IBuffer::Type type,
|
|
const bool dynamic, void* backingStore = nullptr, Group group = Group::DEFAULT);
|
|
|
|
/// Returns the given @p chunk to its owning buffer
|
|
void Release(CVertexBuffer::VBChunk* chunk);
|
|
|
|
size_t GetBytesReserved() const;
|
|
size_t GetBytesAllocated() const;
|
|
|
|
/// Explicit shutdown of the vertex buffer subsystem; releases all currently-allocated buffers.
|
|
void Shutdown();
|
|
|
|
private:
|
|
|
|
/// List of all known vertex buffers
|
|
std::vector<std::unique_ptr<CVertexBuffer>> m_Buffers[static_cast<std::size_t>(Group::COUNT)];
|
|
};
|
|
|
|
extern CVertexBufferManager g_VBMan;
|
|
|
|
#endif
|