eeeac04974
Summary: Notify the driver about the parts of the screen that will be repainted. In some cases this can be benefitial. This is especially useful on lima and panfrost devices (e.g. pinephone, pinebook, pinebook pro). Test Plan: Tested on a pinebook pro with a late mesa version. Basically I implemented it, then it didn't work and I fixed it. Maybe next step we want to look into our damage algorithm.
115 lines
3.2 KiB
C++
115 lines
3.2 KiB
C++
/*
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KWin - the KDE window manager
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This file is part of the KDE project.
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SPDX-FileCopyrightText: 2015 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef KWIN_EGL_GBM_BACKEND_H
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#define KWIN_EGL_GBM_BACKEND_H
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#include "abstract_egl_backend.h"
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#include <memory>
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struct gbm_surface;
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namespace KWin
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{
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class AbstractOutput;
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class DrmBackend;
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class DrmBuffer;
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class DrmSurfaceBuffer;
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class DrmOutput;
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class GbmSurface;
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/**
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* @brief OpenGL Backend using Egl on a GBM surface.
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*/
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class EglGbmBackend : public AbstractEglBackend
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{
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Q_OBJECT
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public:
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EglGbmBackend(DrmBackend *drmBackend);
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~EglGbmBackend() override;
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void screenGeometryChanged(const QSize &size) override;
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SceneOpenGLTexturePrivate *createBackendTexture(SceneOpenGLTexture *texture) override;
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QRegion prepareRenderingFrame() override;
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void endRenderingFrame(const QRegion &renderedRegion, const QRegion &damagedRegion) override;
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void endRenderingFrameForScreen(int screenId, const QRegion &damage, const QRegion &damagedRegion) override;
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bool usesOverlayWindow() const override;
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bool perScreenRendering() const override;
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QRegion prepareRenderingForScreen(int screenId) override;
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void init() override;
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QSharedPointer<GLTexture> textureForOutput(AbstractOutput *requestedOutput) const override;
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protected:
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void present() override;
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void cleanupSurfaces() override;
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void aboutToStartPainting(const QRegion &damage) override;
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private:
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bool initializeEgl();
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bool initBufferConfigs();
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bool initRenderingContext();
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struct Output {
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DrmOutput *output = nullptr;
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DrmSurfaceBuffer *buffer = nullptr;
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std::shared_ptr<GbmSurface> gbmSurface;
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EGLSurface eglSurface = EGL_NO_SURFACE;
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int bufferAge = 0;
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/**
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* @brief The damage history for the past 10 frames.
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*/
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QList<QRegion> damageHistory;
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struct {
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GLuint framebuffer = 0;
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GLuint texture = 0;
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std::shared_ptr<GLVertexBuffer> vbo;
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} render;
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};
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void createOutput(DrmOutput *drmOutput);
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bool resetOutput(Output &output, DrmOutput *drmOutput);
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std::shared_ptr<GbmSurface> createGbmSurface(const QSize &size) const;
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EGLSurface createEglSurface(std::shared_ptr<GbmSurface> gbmSurface) const;
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bool makeContextCurrent(const Output &output) const;
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void setViewport(const Output &output) const;
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bool resetFramebuffer(Output &output);
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void initRenderTarget(Output &output);
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void prepareRenderFramebuffer(const Output &output) const;
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void renderFramebufferToSurface(Output &output);
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void presentOnOutput(Output &output, const QRegion &damagedRegion);
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void removeOutput(DrmOutput *drmOutput);
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void cleanupOutput(Output &output);
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void cleanupFramebuffer(Output &output);
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DrmBackend *m_backend;
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QVector<Output> m_outputs;
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friend class EglGbmTexture;
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};
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/**
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* @brief Texture using an EGLImageKHR.
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*/
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class EglGbmTexture : public AbstractEglTexture
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{
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public:
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~EglGbmTexture() override;
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private:
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friend class EglGbmBackend;
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EglGbmTexture(SceneOpenGLTexture *texture, EglGbmBackend *backend);
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};
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} // namespace
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#endif
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