8681a69f47
Whether an overlay window is used for compositing can be determined by checking the return value of overlayWindow().
138 lines
3.6 KiB
C++
138 lines
3.6 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: 2012 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_GLX_BACKEND_H
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#define KWIN_GLX_BACKEND_H
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#include "openglbackend.h"
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#include "texture.h"
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#include "x11eventfilter.h"
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#include <xcb/glx.h>
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#include <epoxy/glx.h>
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#include <fixx11h.h>
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namespace KWin
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{
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class VsyncMonitor;
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class X11StandalonePlatform;
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// GLX_MESA_swap_interval
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using glXSwapIntervalMESA_func = int (*)(unsigned int interval);
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extern glXSwapIntervalMESA_func glXSwapIntervalMESA;
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class FBConfigInfo
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{
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public:
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GLXFBConfig fbconfig;
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int bind_texture_format;
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int texture_targets;
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int y_inverted;
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int mipmap;
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};
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// ------------------------------------------------------------------
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class SwapEventFilter : public X11EventFilter
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{
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public:
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SwapEventFilter(xcb_drawable_t drawable, xcb_glx_drawable_t glxDrawable);
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bool event(xcb_generic_event_t *event) override;
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private:
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xcb_drawable_t m_drawable;
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xcb_glx_drawable_t m_glxDrawable;
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};
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/**
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* @brief OpenGL Backend using GLX over an X overlay window.
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*/
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class GlxBackend : public QObject, public OpenGLBackend
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{
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Q_OBJECT
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public:
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GlxBackend(Display *display, X11StandalonePlatform *backend);
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~GlxBackend() 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 beginFrame(int screenId) override;
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void endFrame(int screenId, const QRegion &damage, const QRegion &damagedRegion) override;
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bool makeCurrent() override;
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void doneCurrent() override;
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OverlayWindow* overlayWindow() const override;
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void init() override;
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private:
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void vblank(std::chrono::nanoseconds timestamp);
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void present(const QRegion &damage);
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bool initBuffer();
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bool checkVersion();
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void initExtensions();
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bool initRenderingContext();
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bool initFbConfig();
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void initVisualDepthHashTable();
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void setSwapInterval(int interval);
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Display *display() const {
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return m_x11Display;
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}
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int visualDepth(xcb_visualid_t visual) const;
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FBConfigInfo *infoForVisual(xcb_visualid_t visual);
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/**
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* @brief The OverlayWindow used by this Backend.
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*/
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OverlayWindow *m_overlayWindow;
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Window window;
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GLXFBConfig fbconfig;
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GLXWindow glxWindow;
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GLXContext ctx;
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QHash<xcb_visualid_t, FBConfigInfo *> m_fbconfigHash;
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QHash<xcb_visualid_t, int> m_visualDepthHash;
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std::unique_ptr<SwapEventFilter> m_swapEventFilter;
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int m_bufferAge;
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bool m_haveMESACopySubBuffer = false;
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bool m_haveMESASwapControl = false;
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bool m_haveEXTSwapControl = false;
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bool m_haveSGISwapControl = false;
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bool m_haveINTELSwapEvent = false;
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Display *m_x11Display;
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X11StandalonePlatform *m_backend;
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VsyncMonitor *m_vsyncMonitor = nullptr;
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friend class GlxTexture;
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};
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/**
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* @brief Texture using an GLXPixmap.
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*/
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class GlxTexture : public SceneOpenGLTexturePrivate
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{
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public:
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~GlxTexture() override;
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void onDamage() override;
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bool loadTexture(WindowPixmap *pixmap) override;
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OpenGLBackend *backend() override;
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private:
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friend class GlxBackend;
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GlxTexture(SceneOpenGLTexture *texture, GlxBackend *backend);
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bool loadTexture(xcb_pixmap_t pix, const QSize &size, xcb_visualid_t visual);
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Display *display() const {
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return m_backend->m_x11Display;
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}
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SceneOpenGLTexture *q;
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GlxBackend *m_backend;
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GLXPixmap m_glxpixmap; // the glx pixmap the texture is bound to
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};
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} // namespace
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#endif // KWIN_GLX_BACKEND_H
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