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Highgui backend on top of Framebuffer #25661 ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [ x] I agree to contribute to the project under Apache 2 License. - [ x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV - [ x] The PR is proposed to the proper branch - [ ] There is a reference to the original bug report and related work - [ x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [ x] The feature is well documented and sample code can be built with the project CMake Environment variables used: OPENCV_UI_BACKEND - you need to add the value “FB” OPENCV_UI_PRIORITY_FB - requires priority indication OPENCV_HIGHGUI_FB_MODE={FB|XVFB|EMU} - mode of using Framebuffer (default "FB") - FB - Linux Framebuffer - XVFB - virtual Framebuffer - EMU - emulation (images are not displayed) OPENCV_HIGHGUI_FB_DEVICE (FRAMEBUFFER) - path to the Framebuffer file (default "/dev/fb0"). Examples of using: sudo OPENCV_UI_BACKEND=FB ./opencv_test_highgui sudo OPENCV_UI_PRIORITY_FB=1111 ./opencv_test_highgui OPENCV_UI_BACKEND=FB OPENCV_HIGHGUI_FB_MODE=EMU ./opencv_test_highgui sudo OPENCV_UI_BACKEND=FB OPENCV_HIGHGUI_FB_MODE=FB ./opencv_test_highgui export DISPLAY=:99 Xvfb $DISPLAY -screen 0 1024x768x24 -fbdir /tmp/ -f /tmp/user.xvfb.auth& sudo -u sipeed XAUTHORITY=/tmp/user.xvfb.auth x11vnc -display $DISPLAY -listen localhost& DISPLAY=:0 gvncviewer localhost& FRAMEBUFFER=/tmp/Xvfb_screen0 OPENCV_UI_BACKEND=FB OPENCV_HIGHGUI_FB_MODE=XVFB ./opencv_test_highgui
141 lines
3.6 KiB
C++
141 lines
3.6 KiB
C++
// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html.
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#ifndef OPENCV_HIGHGUI_BACKEND_HPP
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#define OPENCV_HIGHGUI_BACKEND_HPP
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#include <memory>
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#include <map>
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namespace cv { namespace highgui_backend {
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class CV_EXPORTS UIWindowBase
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{
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public:
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typedef std::shared_ptr<UIWindowBase> Ptr;
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typedef std::weak_ptr<UIWindowBase> WeakPtr;
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virtual ~UIWindowBase();
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virtual const std::string& getID() const = 0; // internal name, used for logging
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virtual bool isActive() const = 0;
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virtual void destroy() = 0;
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}; // UIWindowBase
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class UITrackbar;
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class CV_EXPORTS UIWindow : public UIWindowBase
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{
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public:
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virtual ~UIWindow();
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virtual void imshow(InputArray image) = 0;
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virtual double getProperty(int prop) const = 0;
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virtual bool setProperty(int prop, double value) = 0;
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virtual void resize(int width, int height) = 0;
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virtual void move(int x, int y) = 0;
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virtual Rect getImageRect() const = 0;
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virtual void setTitle(const std::string& title) = 0;
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virtual void setMouseCallback(MouseCallback onMouse, void* userdata /*= 0*/) = 0;
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//TODO: handle both keys and mouse events (both with mouse coordinates)
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//virtual void setInputCallback(InputCallback onInputEvent, void* userdata /*= 0*/) = 0;
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virtual std::shared_ptr<UITrackbar> createTrackbar(
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const std::string& name,
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int count,
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TrackbarCallback onChange /*= 0*/,
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void* userdata /*= 0*/
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) = 0;
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virtual std::shared_ptr<UITrackbar> findTrackbar(const std::string& name) = 0;
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#if 0 // QT only
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virtual void displayOverlay(const std::string& text, int delayms = 0) = 0;
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virtual void displayStatusBar(const std::string& text, int delayms /*= 0*/) = 0;
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virtual int createButton(
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const std::string& bar_name, ButtonCallback on_change,
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void* userdata = 0, int type /*= QT_PUSH_BUTTON*/,
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bool initial_button_state /*= false*/
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) = 0;
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// addText, QtFont stuff
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#endif
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#if 0 // OpenGL
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virtual void imshow(const ogl::Texture2D& tex) = 0;
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virtual void setOpenGlDrawCallback(OpenGlDrawCallback onOpenGlDraw, void* userdata = 0) = 0;
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virtual void setOpenGlContext() = 0;
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virtual void updateWindow() = 0;
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#endif
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}; // UIWindow
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class CV_EXPORTS UITrackbar : public UIWindowBase
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{
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public:
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virtual ~UITrackbar();
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virtual int getPos() const = 0;
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virtual void setPos(int pos) = 0;
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virtual cv::Range getRange() const = 0;
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virtual void setRange(const cv::Range& range) = 0;
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}; // UITrackbar
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class CV_EXPORTS UIBackend
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{
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public:
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virtual ~UIBackend();
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virtual void destroyAllWindows() = 0;
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// namedWindow
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virtual std::shared_ptr<UIWindow> createWindow(
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const std::string& winname,
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int flags
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) = 0;
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virtual int waitKeyEx(int delay /*= 0*/) = 0;
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virtual int pollKey() = 0;
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virtual const std::string getName() const = 0;
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};
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std::shared_ptr<UIBackend>& getCurrentUIBackend();
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void setUIBackend(const std::shared_ptr<UIBackend>& api);
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bool setUIBackend(const std::string& backendName);
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#ifndef BUILD_PLUGIN
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#ifdef HAVE_WIN32UI
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std::shared_ptr<UIBackend> createUIBackendWin32UI();
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#endif
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#ifdef HAVE_GTK
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std::shared_ptr<UIBackend> createUIBackendGTK();
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#endif
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#if 0 // TODO: defined HAVE_QT
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std::shared_ptr<UIBackend> createUIBackendQT();
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#endif
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#ifdef HAVE_FRAMEBUFFER
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std::shared_ptr<UIBackend> createUIBackendFramebuffer();
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#endif
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#endif // BUILD_PLUGIN
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} // namespace highgui_backend
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} // namespace cv
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#endif // OPENCV_HIGHGUI_BACKEND_HPP
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