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https://gitea.wildfiregames.com/0ad/0ad
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cf4a4d8fd5
It allows us more flexibility on how we control swapchain. That includes toggling V-Sync in real time.
97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
/* Copyright (C) 2026 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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#ifndef INCLUDED_RENDERER_BACKEND_GL_SWAPCHAIN
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#define INCLUDED_RENDERER_BACKEND_GL_SWAPCHAIN
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#include "lib/ogl.h"
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#include "renderer/backend/gl/Framebuffer.h"
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#include "renderer/backend/ISwapChain.h"
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#include <cstdint>
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#include <memory>
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#include <unordered_map>
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typedef struct SDL_Window SDL_Window;
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namespace Renderer
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{
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namespace Backend
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{
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namespace GL
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{
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class CDevice;
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class CSwapChain final : public ISwapChain
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{
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public:
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~CSwapChain() override;
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IDevice* GetDevice() override;
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bool IsValid() const override { return true; }
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bool AcquireNextBackbuffer() override;
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IFramebuffer* GetCurrentBackbuffer(
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const AttachmentLoadOp colorAttachmentLoadOp,
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const AttachmentStoreOp colorAttachmentStoreOp,
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const AttachmentLoadOp depthStencilAttachmentLoadOp,
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const AttachmentStoreOp depthStencilAttachmentStoreOp) override;
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void Present() override;
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private:
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friend class CDevice;
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static std::unique_ptr<CSwapChain> Create(
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CDevice* device, SDL_Window* window,
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int surfaceDrawableWidth, int surfaceDrawableHeight,
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const bool vsync);
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CSwapChain();
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CDevice* m_Device{nullptr};
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SDL_Window* m_Window{nullptr};
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int m_SurfaceDrawableWidth{0};
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int m_SurfaceDrawableHeight{0};
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using BackbufferKey = std::tuple<
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AttachmentLoadOp, AttachmentStoreOp,
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AttachmentLoadOp, AttachmentStoreOp>;
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struct BackbufferKeyHash
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{
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size_t operator()(const BackbufferKey& key) const;
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};
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// We use std::unordered_map to avoid storing sizes of Attachment*Op
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// enumerations. If it becomes a performance issue we'll replace it
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// by an array.
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std::unordered_map<
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BackbufferKey, std::unique_ptr<CFramebuffer>, BackbufferKeyHash> m_Backbuffers;
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bool m_BackbufferAcquired{false};
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};
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} // namespace GL
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} // namespace Backend
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} // namespace Renderer
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#endif // INCLUDED_RENDERER_BACKEND_GL_SWAPCHAIN
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