bb
157c6af18e
Avoid cases of filenames Update years in terms and other legal(ish) documents Don't update years in license headers, since change is not meaningful Will add linter rule in seperate commit Happy recompiling everyone! Original Patch By: Nescio Comment By: Gallaecio Differential Revision: D2620 This was SVN commit r27786.
114 lines
3.2 KiB
C++
114 lines
3.2 KiB
C++
/* Copyright (C) 2022 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Allocate and destroy CVertexBuffers
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*/
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#ifndef INCLUDED_VERTEXBUFFERMANAGER
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#define INCLUDED_VERTEXBUFFERMANAGER
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#include "lib/types.h"
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#include "renderer/VertexBuffer.h"
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#include <memory>
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#include <utility>
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#include <vector>
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// CVertexBufferManager: owner object for CVertexBuffer objects; acts as
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// 'front end' for their allocation and destruction
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class CVertexBufferManager
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{
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public:
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enum class Group : u32
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{
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DEFAULT,
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TERRAIN,
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WATER,
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COUNT
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};
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// Helper for automatic VBChunk lifetime management.
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class Handle
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{
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public:
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Handle() = default;
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Handle(const Handle&) = delete;
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Handle& operator=(const Handle&) = delete;
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explicit Handle(CVertexBuffer::VBChunk* chunk);
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Handle(Handle&& other);
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Handle& operator=(Handle&& other);
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~Handle() { Reset(); }
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bool IsValid() const { return m_Chunk != nullptr; }
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explicit operator bool() const { return IsValid(); }
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bool operator!() const { return !static_cast<bool>(*this); }
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void Reset();
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friend void swap(Handle& lhs, Handle& rhs)
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{
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using std::swap;
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swap(lhs.m_Chunk, rhs.m_Chunk);
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}
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CVertexBuffer::VBChunk& operator*() const { return *m_Chunk; }
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CVertexBuffer::VBChunk* operator->() const { return m_Chunk; }
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CVertexBuffer::VBChunk* Get() const { return m_Chunk; }
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private:
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CVertexBuffer::VBChunk* m_Chunk = nullptr;
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};
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/**
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* Try to allocate a vertex buffer of the given size and type.
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*
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* @param vertexSize size of each vertex in the buffer
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* @param numberOfVertices number of vertices in the buffer
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* @param type buffer type
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* @param dynamic will be buffer updated frequently or not
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* @param backingStore if not dynamic, this is nullptr; else for dynamic,
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* this must be a copy of the vertex data that remains valid for the
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* lifetime of the VBChunk
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* @return chunk, or empty handle if no free chunks available
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*/
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Handle AllocateChunk(
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const size_t vertexSize, const size_t numberOfVertices,
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const Renderer::Backend::IBuffer::Type type,
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const bool dynamic, void* backingStore = nullptr, Group group = Group::DEFAULT);
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/// Returns the given @p chunk to its owning buffer
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void Release(CVertexBuffer::VBChunk* chunk);
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size_t GetBytesReserved() const;
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size_t GetBytesAllocated() const;
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/// Explicit shutdown of the vertex buffer subsystem; releases all currently-allocated buffers.
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void Shutdown();
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private:
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/// List of all known vertex buffers
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std::vector<std::unique_ptr<CVertexBuffer>> m_Buffers[static_cast<std::size_t>(Group::COUNT)];
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};
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extern CVertexBufferManager g_VBMan;
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#endif
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