mirror of
https://github.com/hyperion-project/hyperion.ng.git
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300 lines
7.8 KiB
C++
Executable File
300 lines
7.8 KiB
C++
Executable File
#include <utils/Logger.h>
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#include <grabber/X11Grabber.h>
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X11Grabber::X11Grabber(int cropLeft, int cropRight, int cropTop, int cropBottom, int pixelDecimation)
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: Grabber("X11GRABBER", 0, 0, cropLeft, cropRight, cropTop, cropBottom)
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, _x11Display(nullptr)
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, _pixmap(None)
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, _srcFormat(nullptr)
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, _dstFormat(nullptr)
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, _srcPicture(None)
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, _dstPicture(None)
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, _pixelDecimation(pixelDecimation)
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, _screenWidth(0)
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, _screenHeight(0)
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, _src_x(cropLeft)
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, _src_y(cropTop)
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, _image(0,0)
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{
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_useImageResampler = false;
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_imageResampler.setCropping(0, 0, 0, 0); // cropping is performed by XRender, XShmGetImage or XGetImage
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memset(&_pictAttr, 0, sizeof(_pictAttr));
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_pictAttr.repeat = RepeatNone;
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}
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X11Grabber::~X11Grabber()
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{
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if (_x11Display != nullptr)
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{
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freeResources();
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XCloseDisplay(_x11Display);
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}
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}
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void X11Grabber::freeResources()
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{
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// Cleanup allocated resources of the X11 grab
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XDestroyImage(_xImage);
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if(_XShmAvailable)
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{
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XShmDetach(_x11Display, &_shminfo);
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shmdt(_shminfo.shmaddr);
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shmctl(_shminfo.shmid, IPC_RMID, 0);
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}
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if (_XRenderAvailable)
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{
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XRenderFreePicture(_x11Display, _srcPicture);
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XRenderFreePicture(_x11Display, _dstPicture);
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XFreePixmap(_x11Display, _pixmap);
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}
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}
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void X11Grabber::setupResources()
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{
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if(_XShmAvailable)
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{
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_xImage = XShmCreateImage(_x11Display, _windowAttr.visual, _windowAttr.depth, ZPixmap, NULL, &_shminfo, _width, _height);
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_shminfo.shmid = shmget(IPC_PRIVATE, _xImage->bytes_per_line * _xImage->height, IPC_CREAT|0777);
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_xImage->data = (char*)shmat(_shminfo.shmid,0,0);
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_shminfo.shmaddr = _xImage->data;
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_shminfo.readOnly = False;
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XShmAttach(_x11Display, &_shminfo);
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}
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if (_XRenderAvailable)
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{
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if(_XShmPixmapAvailable)
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{
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_pixmap = XShmCreatePixmap(_x11Display, _window, _xImage->data, &_shminfo, _width, _height, _windowAttr.depth);
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}
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else
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{
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_pixmap = XCreatePixmap(_x11Display, _window, _width, _height, _windowAttr.depth);
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}
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_srcFormat = XRenderFindVisualFormat(_x11Display, _windowAttr.visual);
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_dstFormat = XRenderFindVisualFormat(_x11Display, _windowAttr.visual);
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_srcPicture = XRenderCreatePicture(_x11Display, _window, _srcFormat, CPRepeat, &_pictAttr);
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_dstPicture = XRenderCreatePicture(_x11Display, _pixmap, _dstFormat, CPRepeat, &_pictAttr);
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XRenderSetPictureFilter(_x11Display, _srcPicture, FilterBilinear, NULL, 0);
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}
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}
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bool X11Grabber::Setup()
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{
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_x11Display = XOpenDisplay(NULL);
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if (_x11Display == nullptr)
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{
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Error(_log, "Unable to open display");
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if (getenv("DISPLAY"))
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{
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Error(_log, "%s",getenv("DISPLAY"));
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}
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else
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{
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Error(_log, "DISPLAY environment variable not set");
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}
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return false;
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}
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_window = DefaultRootWindow(_x11Display);
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int dummy, pixmaps_supported;
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_XRenderAvailable = XRenderQueryExtension(_x11Display, &dummy, &dummy);
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_XShmAvailable = XShmQueryExtension(_x11Display);
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XShmQueryVersion(_x11Display, &dummy, &dummy, &pixmaps_supported);
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_XShmPixmapAvailable = pixmaps_supported && XShmPixmapFormat(_x11Display) == ZPixmap;
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// Image scaling is performed by XRender when available, otherwise by ImageResampler
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_imageResampler.setHorizontalPixelDecimation(_XRenderAvailable ? 1 : _pixelDecimation);
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_imageResampler.setVerticalPixelDecimation(_XRenderAvailable ? 1 : _pixelDecimation);
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bool result = (updateScreenDimensions(true) >=0);
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ErrorIf(!result, _log, "X11 Grabber start failed");
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return result;
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}
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int X11Grabber::grabFrame(Image<ColorRgb> & image, bool forceUpdate)
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{
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if (!_enabled) return 0;
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if (forceUpdate)
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updateScreenDimensions(forceUpdate);
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if (_XRenderAvailable)
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{
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double scale_x = static_cast<double>(_windowAttr.width / _pixelDecimation) / static_cast<double>(_windowAttr.width);
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double scale_y = static_cast<double>(_windowAttr.height / _pixelDecimation) / static_cast<double>(_windowAttr.height);
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double scale = qMin(scale_y, scale_x);
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_transform =
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{
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{
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{
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XDoubleToFixed(1),
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XDoubleToFixed(0),
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XDoubleToFixed(0)
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},
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{
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XDoubleToFixed(0),
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XDoubleToFixed(1),
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XDoubleToFixed(0)
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},
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{
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XDoubleToFixed(0),
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XDoubleToFixed(0),
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XDoubleToFixed(scale)
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}
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}
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};
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XRenderSetPictureTransform (_x11Display, _srcPicture, &_transform);
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// display, op, src, mask, dest, src_x = cropLeft,
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// src_y = cropTop, mask_x, mask_y, dest_x, dest_y, width, height
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XRenderComposite(
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_x11Display, PictOpSrc, _srcPicture, None, _dstPicture, ( _src_x/_pixelDecimation),
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(_src_y/_pixelDecimation), 0, 0, 0, 0, _width, _height);
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XSync(_x11Display, False);
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if (_XShmAvailable)
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{
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XShmGetImage(_x11Display, _pixmap, _xImage, 0, 0, AllPlanes);
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}
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else
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{
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_xImage = XGetImage(_x11Display, _pixmap, 0, 0, _width, _height, AllPlanes, ZPixmap);
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}
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}
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else if (_XShmAvailable)
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{
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// use xshm
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XShmGetImage(_x11Display, _window, _xImage, _src_x, _src_y, AllPlanes);
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}
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else
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{
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// all things done by xgetimage
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_xImage = XGetImage(_x11Display, _window, _src_x, _src_y, _width, _height, AllPlanes, ZPixmap);
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}
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if (_xImage == nullptr)
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{
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Error(_log, "Grab Failed!");
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return -1;
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}
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_imageResampler.processImage(reinterpret_cast<const uint8_t *>(_xImage->data), _xImage->width, _xImage->height, _xImage->bytes_per_line, PIXELFORMAT_BGR32, image);
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return 0;
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}
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int X11Grabber::updateScreenDimensions(bool force)
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{
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const Status status = XGetWindowAttributes(_x11Display, _window, &_windowAttr);
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if (status == 0)
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{
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Error(_log, "Failed to obtain window attributes");
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return -1;
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}
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if (!force && _screenWidth == unsigned(_windowAttr.width) && _screenHeight == unsigned(_windowAttr.height))
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{
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// No update required
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return 0;
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}
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if (_screenWidth || _screenHeight)
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{
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freeResources();
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}
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Info(_log, "Update of screen resolution: [%dx%d] to [%dx%d]", _screenWidth, _screenHeight, _windowAttr.width, _windowAttr.height);
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_screenWidth = _windowAttr.width;
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_screenHeight = _windowAttr.height;
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int width=0, height=0;
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// Image scaling is performed by XRender when available, otherwise by ImageResampler
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if (_XRenderAvailable)
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{
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width = (_screenWidth > unsigned(_cropLeft + _cropRight))
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? ((_screenWidth - _cropLeft - _cropRight) / _pixelDecimation)
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: _screenWidth / _pixelDecimation;
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height = (_screenHeight > unsigned(_cropTop + _cropBottom))
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? ((_screenHeight - _cropTop - _cropBottom) / _pixelDecimation)
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: _screenHeight / _pixelDecimation;
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Info(_log, "Using XRender for grabbing");
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}
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else
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{
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width = (_screenWidth > unsigned(_cropLeft + _cropRight))
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? (_screenWidth - _cropLeft - _cropRight)
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: _screenWidth;
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height = (_screenHeight > unsigned(_cropTop + _cropBottom))
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? (_screenHeight - _cropTop - _cropBottom)
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: _screenHeight;
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Info(_log, "Using XGetImage for grabbing");
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}
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// calculate final image dimensions and adjust top/left cropping in 3D modes
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switch (_videoMode)
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{
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case VIDEO_3DSBS:
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_width = width /2;
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_height = height;
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_src_x = _cropLeft / 2;
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_src_y = _cropTop;
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break;
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case VIDEO_3DTAB:
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_width = width;
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_height = height / 2;
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_src_x = _cropLeft;
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_src_y = _cropTop / 2;
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break;
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case VIDEO_2D:
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default:
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_width = width;
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_height = height;
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_src_x = _cropLeft;
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_src_y = _cropTop;
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break;
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}
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Info(_log, "Update output image resolution: [%dx%d] to [%dx%d]", _image.width(), _image.height(), _width, _height);
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_image.resize(_width, _height);
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setupResources();
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return 1;
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}
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void X11Grabber::setVideoMode(VideoMode mode)
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{
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Grabber::setVideoMode(mode);
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updateScreenDimensions(true);
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}
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void X11Grabber::setWidthHeight(int width, int height)
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{
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// empty overwrite
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}
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void X11Grabber::setPixelDecimation(int pixelDecimation)
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{
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if(_pixelDecimation != pixelDecimation)
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{
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_pixelDecimation = pixelDecimation;
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updateScreenDimensions(true);
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}
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}
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void X11Grabber::setCropping(unsigned cropLeft, unsigned cropRight, unsigned cropTop, unsigned cropBottom)
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{
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Grabber::setCropping(cropLeft, cropRight, cropTop, cropBottom);
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if(_x11Display != nullptr) updateScreenDimensions(true); // segfault on init
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}
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