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82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
// SPDX-FileCopyrightText: 2019-2022 Connor McLaughlin <stenzek@gmail.com>
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// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
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#pragma once
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#include "../drm_display.h"
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#include "context_egl.h"
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#include <atomic>
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#include <condition_variable>
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#include <gbm.h>
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#include <mutex>
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#include <thread>
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#define CONTEXT_EGL_GBM_USE_PRESENT_THREAD 1
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namespace GL {
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class ContextEGLGBM final : public ContextEGL
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{
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public:
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ContextEGLGBM(const WindowInfo& wi);
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~ContextEGLGBM() override;
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static std::unique_ptr<Context> Create(const WindowInfo& wi, const Version* versions_to_try,
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size_t num_versions_to_try);
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std::unique_ptr<Context> CreateSharedContext(const WindowInfo& wi) override;
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void ResizeSurface(u32 new_surface_width = 0, u32 new_surface_height = 0) override;
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bool SwapBuffers() override;
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bool SetSwapInterval(s32 interval) override;
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std::vector<FullscreenModeInfo> EnumerateFullscreenModes() override;
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protected:
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bool SetDisplay() override;
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EGLNativeWindowType GetNativeWindow(EGLConfig config) override;
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private:
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enum : u32
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{
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MAX_BUFFERS = 5
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};
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struct Buffer
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{
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struct gbm_bo* bo;
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u32 fb_id;
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};
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bool CreateDisplay();
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bool CreateGBMDevice();
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Buffer* LockFrontBuffer();
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void ReleaseBuffer(Buffer* buffer);
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void PresentBuffer(Buffer* buffer, bool wait_for_vsync);
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void StartPresentThread();
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void StopPresentThread();
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void PresentThread();
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DRMDisplay m_drm_display;
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struct gbm_device* m_gbm_device = nullptr;
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struct gbm_surface* m_fb_surface = nullptr;
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bool m_vsync = true;
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#ifdef CONTEXT_EGL_GBM_USE_PRESENT_THREAD
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std::thread m_present_thread;
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std::mutex m_present_mutex;
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std::condition_variable m_present_cv;
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std::atomic_bool m_present_pending{false};
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std::atomic_bool m_present_thread_shutdown{false};
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std::condition_variable m_present_done_cv;
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Buffer* m_current_present_buffer = nullptr;
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#endif
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u32 m_num_buffers = 0;
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std::array<Buffer, MAX_BUFFERS> m_buffers{};
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};
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} // namespace GL
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