File indexing completed on 2024-05-05 16:19:53

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 2008 Lubos Lunak <l.lunak@kde.org>
     SPDX-FileCopyrightText: 2013 Martin Gräßlin <mgraesslin@kde.org>
 
     SPDX-License-Identifier: LGPL-2.1-or-later
 */
 
 #include "cptr_p.h"
 #include "kwindowsystem_xcb_debug.h"
 #include "kxutils_p.h"
 #include <QBitmap>
 
 #if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 #include <private/qtx11extras_p.h>
 #else
 #include <QX11Info>
 #endif
 
 #include <xcb/xcb.h>
 
 namespace KXUtils
 {
 template<typename T>
 T fromNative(xcb_pixmap_t pixmap, xcb_connection_t *c)
 {
     const xcb_get_geometry_cookie_t geoCookie = xcb_get_geometry_unchecked(c, pixmap);
     UniqueCPointer<xcb_get_geometry_reply_t> geo(xcb_get_geometry_reply(c, geoCookie, nullptr));
     if (!geo) {
         // getting geometry for the pixmap failed
         return T();
     }
 
     const xcb_get_image_cookie_t imageCookie = xcb_get_image_unchecked(c, XCB_IMAGE_FORMAT_Z_PIXMAP, pixmap, 0, 0, geo->width, geo->height, ~0);
     UniqueCPointer<xcb_get_image_reply_t> xImage(xcb_get_image_reply(c, imageCookie, nullptr));
     if (!xImage) {
         // request for image data failed
         return T();
     }
     QImage::Format format = QImage::Format_Invalid;
     switch (xImage->depth) {
     case 1:
         format = QImage::Format_MonoLSB;
         break;
     case 16:
         format = QImage::Format_RGB16;
         break;
     case 24:
         format = QImage::Format_RGB32;
         break;
     case 30: {
         // Qt doesn't have a matching image format. We need to convert manually
         uint32_t *pixels = reinterpret_cast<uint32_t *>(xcb_get_image_data(xImage.get()));
         for (uint i = 0; i < xImage.get()->length; ++i) {
             int r = (pixels[i] >> 22) & 0xff;
             int g = (pixels[i] >> 12) & 0xff;
             int b = (pixels[i] >> 2) & 0xff;
 
             pixels[i] = qRgba(r, g, b, 0xff);
         }
         // fall through, Qt format is still Format_ARGB32_Premultiplied
         Q_FALLTHROUGH();
     }
     case 32:
         format = QImage::Format_ARGB32_Premultiplied;
         break;
     default:
         return T(); // we don't know
     }
     QImage image(xcb_get_image_data(xImage.get()), geo->width, geo->height, xcb_get_image_data_length(xImage.get()) / geo->height, format, free, xImage.get());
     xImage.release();
     if (image.isNull()) {
         return T();
     }
     if (image.format() == QImage::Format_MonoLSB) {
         // work around an abort in QImage::color
         image.setColorCount(2);
         image.setColor(0, QColor(Qt::white).rgb());
         image.setColor(1, QColor(Qt::black).rgb());
     }
     return T::fromImage(image);
 }
 
 // Create QPixmap from X pixmap. Take care of different depths if needed.
 QPixmap createPixmapFromHandle(WId pixmap, WId pixmap_mask)
 {
     return createPixmapFromHandle(QX11Info::connection(), pixmap, pixmap_mask);
 }
 
 QPixmap createPixmapFromHandle(xcb_connection_t *c, WId pixmap, WId pixmap_mask)
 {
 #if Q_BYTE_ORDER == Q_BIG_ENDIAN
     qCDebug(LOG_KKEYSERVER_X11) << "Byte order not supported";
     return QPixmap();
 #endif
     const xcb_setup_t *setup = xcb_get_setup(c);
     if (setup->image_byte_order != XCB_IMAGE_ORDER_LSB_FIRST) {
         qCDebug(LOG_KKEYSERVER_X11) << "Byte order not supported";
         return QPixmap();
     }
 
     QPixmap pix = fromNative<QPixmap>(pixmap, c);
     if (pixmap_mask != XCB_PIXMAP_NONE) {
         QBitmap mask = fromNative<QBitmap>(pixmap_mask, c);
         if (mask.size() != pix.size()) {
             return QPixmap();
         }
         pix.setMask(mask);
     }
     return pix;
 }
 
 // Functions for X timestamp comparing. For Time being 32bit they're fairly simple
 // (the #if 0 part), but on 64bit architectures Time is 64bit unsigned long,
 // so there special care needs to be taken to always use only the lower 32bits.
 #if 0
 int timestampCompare(Time time1, Time time2)   // like strcmp()
 {
     if (time1 == time2) {
         return 0;
     }
     return (time1 - time2) < 0x7fffffffU ? 1 : -1;   // time1 > time2 -> 1, handle wrapping
 }
 
 Time timestampDiff(Time time1, Time time2)   // returns time2 - time1
 {
     // no need to handle wrapping?
     return time2 - time1;
 }
 #else
 int timestampCompare(unsigned long time1_, unsigned long time2_) // like strcmp()
 {
     quint32 time1 = time1_;
     quint32 time2 = time2_;
     if (time1 == time2) {
         return 0;
     }
     return quint32(time1 - time2) < 0x7fffffffU ? 1 : -1; // time1 > time2 -> 1, handle wrapping
 }
 
 int timestampDiff(unsigned long time1_, unsigned long time2_) // returns time2 - time1
 {
     // no need to handle wrapping?
     quint32 time1 = time1_;
     quint32 time2 = time2_;
     return quint32(time2 - time1);
 }
 #endif
 
 } // namespace