GHIThread.h

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#pragma once
 
#include "EditorCore/Thread/TUnbufferedFrameWorkerThread.h"
#include "RenderCore/GHIThreadUpdateContext.h"
 
#include <Common/primitive_type.h>
#include <Utility/Timer.h>
 
#include <memory>
#include <atomic>
#include <thread>
 
namespace ph::editor::ghi { class GraphicsContext; }
 
namespace ph::editor
{
 
class GHIThread final : public TUnbufferedFrameWorkerThread<void(ghi::GraphicsContext&)>
{
public:
    using Base = TUnbufferedFrameWorkerThread<void(ghi::GraphicsContext&)>;
 
    GHIThread();
    ~GHIThread() override;
 
    void onAsyncWorkerStart() override;
    void onAsyncWorkerStop() override;
    void onAsyncProcessWork(const Work& work) override;
    void onBeginFrame() override;
    void onEndFrame() override;
 
    void addContextSwitchWork(ghi::GraphicsContext* newCtx);
 
    float32 getFrameTimeMs() const;
 
    bool isOnGHIThread() const;
 
private:
    void switchContext(ghi::GraphicsContext* newCtx);
 
    // Fields that are accessed on GHI thread
    ghi::GraphicsContext* m_ctx;
    std::unique_ptr<ghi::GraphicsContext> m_nullCtx;
    GHIThreadUpdateContext m_updateCtx;
    Timer m_frameTimer;
 
    std::atomic<float32> m_frameTimeMs;
};
 
inline float32 GHIThread::getFrameTimeMs() const
{
    return m_frameTimeMs.load(std::memory_order_relaxed);
}
 
inline bool GHIThread::isOnGHIThread() const
{
    return std::this_thread::get_id() == getWorkerThreadId();
}
 
}// end namespace ph::editor