656 lines
23 KiB
C++
656 lines
23 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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Copyright (C) 2010 Martin Gräßlin <mgraesslin@kde.org>
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Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "screenshot.h"
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#include <kwinglplatform.h>
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#include <kwinglutils.h>
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#include <kwinxrenderutils.h>
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#include <QtConcurrentRun>
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#include <QDataStream>
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#include <QtCore/QTemporaryFile>
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#include <QtCore/QDir>
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#include <QtDBus/QDBusConnection>
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#include <QVarLengthArray>
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#include <QtGui/QPainter>
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#include <QMatrix4x4>
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#include <xcb/xcb_image.h>
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#include <KLocalizedString>
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#include <KNotification>
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#include <unistd.h>
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namespace KWin
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{
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const static QString s_errorAlreadyTaking = QStringLiteral("org.kde.kwin.Screenshot.Error.AlreadyTaking");
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const static QString s_errorAlreadyTakingMsg = QStringLiteral("A screenshot is already been taken");
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const static QString s_errorFd = QStringLiteral("org.kde.kwin.Screenshot.Error.FileDescriptor");
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const static QString s_errorFdMsg = QStringLiteral("No valid file descriptor");
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const static QString s_errorCancelled = QStringLiteral("org.kde.kwin.Screenshot.Error.Cancelled");
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const static QString s_errorCancelledMsg = QStringLiteral("Screenshot got cancelled");
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const static QString s_errorInvalidArea = QStringLiteral("org.kde.kwin.Screenshot.Error.InvalidArea");
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const static QString s_errorInvalidAreaMsg = QStringLiteral("Invalid area requested");
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const static QString s_errorInvalidScreen = QStringLiteral("org.kde.kwin.Screenshot.Error.InvalidScreen");
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const static QString s_errorInvalidScreenMsg = QStringLiteral("Invalid screen requested");
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bool ScreenShotEffect::supported()
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{
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return effects->compositingType() == XRenderCompositing ||
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(effects->isOpenGLCompositing() && GLRenderTarget::supported());
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}
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ScreenShotEffect::ScreenShotEffect()
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: m_scheduledScreenshot(0)
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{
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connect ( effects, SIGNAL(windowClosed(KWin::EffectWindow*)), SLOT(windowClosed(KWin::EffectWindow*)) );
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QDBusConnection::sessionBus().registerObject(QStringLiteral("/Screenshot"), this, QDBusConnection::ExportScriptableContents);
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}
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ScreenShotEffect::~ScreenShotEffect()
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{
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QDBusConnection::sessionBus().unregisterObject(QStringLiteral("/Screenshot"));
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}
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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static QImage xPictureToImage(xcb_render_picture_t srcPic, const QRect &geometry, xcb_image_t **xImage)
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{
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xcb_connection_t *c = effects->xcbConnection();
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xcb_pixmap_t xpix = xcb_generate_id(c);
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xcb_create_pixmap(c, 32, xpix, effects->x11RootWindow(), geometry.width(), geometry.height());
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XRenderPicture pic(xpix, 32);
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xcb_render_composite(c, XCB_RENDER_PICT_OP_SRC, srcPic, XCB_RENDER_PICTURE_NONE, pic,
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geometry.x(), geometry.y(), 0, 0, 0, 0, geometry.width(), geometry.height());
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xcb_flush(c);
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*xImage = xcb_image_get(c, xpix, 0, 0, geometry.width(), geometry.height(), ~0, XCB_IMAGE_FORMAT_Z_PIXMAP);
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QImage img((*xImage)->data, (*xImage)->width, (*xImage)->height, (*xImage)->stride, QImage::Format_ARGB32_Premultiplied);
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// TODO: byte order might need swapping
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xcb_free_pixmap(c, xpix);
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return img.copy();
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}
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#endif
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void ScreenShotEffect::paintScreen(int mask, QRegion region, ScreenPaintData &data)
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{
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m_cachedOutputGeometry = data.outputGeometry();
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effects->paintScreen(mask, region, data);
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}
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void ScreenShotEffect::postPaintScreen()
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{
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effects->postPaintScreen();
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if (m_scheduledScreenshot) {
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WindowPaintData d(m_scheduledScreenshot);
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double left = 0;
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double top = 0;
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double right = m_scheduledScreenshot->width();
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double bottom = m_scheduledScreenshot->height();
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if (m_scheduledScreenshot->hasDecoration() && m_type & INCLUDE_DECORATION) {
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foreach (const WindowQuad & quad, d.quads) {
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// we need this loop to include the decoration padding
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left = qMin(left, quad.left());
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top = qMin(top, quad.top());
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right = qMax(right, quad.right());
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bottom = qMax(bottom, quad.bottom());
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}
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} else if (m_scheduledScreenshot->hasDecoration()) {
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WindowQuadList newQuads;
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left = m_scheduledScreenshot->width();
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top = m_scheduledScreenshot->height();
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right = 0;
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bottom = 0;
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foreach (const WindowQuad & quad, d.quads) {
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if (quad.type() == WindowQuadContents) {
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newQuads << quad;
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left = qMin(left, quad.left());
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top = qMin(top, quad.top());
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right = qMax(right, quad.right());
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bottom = qMax(bottom, quad.bottom());
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}
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}
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d.quads = newQuads;
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}
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const int width = right - left;
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const int height = bottom - top;
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bool validTarget = true;
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QScopedPointer<GLTexture> offscreenTexture;
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QScopedPointer<GLRenderTarget> target;
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if (effects->isOpenGLCompositing()) {
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offscreenTexture.reset(new GLTexture(GL_RGBA8, width, height));
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offscreenTexture->setFilter(GL_LINEAR);
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offscreenTexture->setWrapMode(GL_CLAMP_TO_EDGE);
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target.reset(new GLRenderTarget(*offscreenTexture));
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validTarget = target->valid();
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}
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if (validTarget) {
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d.setXTranslation(-m_scheduledScreenshot->x() - left);
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d.setYTranslation(-m_scheduledScreenshot->y() - top);
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// render window into offscreen texture
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int mask = PAINT_WINDOW_TRANSFORMED | PAINT_WINDOW_TRANSLUCENT;
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QImage img;
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if (effects->isOpenGLCompositing()) {
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GLRenderTarget::pushRenderTarget(target.data());
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glClearColor(0.0, 0.0, 0.0, 0.0);
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glClear(GL_COLOR_BUFFER_BIT);
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glClearColor(0.0, 0.0, 0.0, 1.0);
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QMatrix4x4 projection;
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projection.ortho(QRect(0, 0, offscreenTexture->width(), offscreenTexture->height()));
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d.setProjectionMatrix(projection);
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effects->drawWindow(m_scheduledScreenshot, mask, infiniteRegion(), d);
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// copy content from framebuffer into image
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img = QImage(QSize(width, height), QImage::Format_ARGB32);
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glReadnPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, img.byteCount(), (GLvoid*)img.bits());
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GLRenderTarget::popRenderTarget();
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ScreenShotEffect::convertFromGLImage(img, width, height);
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}
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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xcb_image_t *xImage = NULL;
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if (effects->compositingType() == XRenderCompositing) {
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setXRenderOffscreen(true);
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effects->drawWindow(m_scheduledScreenshot, mask, QRegion(0, 0, width, height), d);
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if (xRenderOffscreenTarget()) {
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img = xPictureToImage(xRenderOffscreenTarget(), QRect(0, 0, width, height), &xImage);
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}
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setXRenderOffscreen(false);
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}
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#endif
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if (m_type & INCLUDE_CURSOR) {
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grabPointerImage(img, m_scheduledScreenshot->x() + left, m_scheduledScreenshot->y() + top);
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}
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if (m_windowMode == WindowMode::Xpixmap) {
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const int depth = img.depth();
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xcb_pixmap_t xpix = xcb_generate_id(xcbConnection());
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xcb_create_pixmap(xcbConnection(), depth, xpix, x11RootWindow(), img.width(), img.height());
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xcb_gcontext_t cid = xcb_generate_id(xcbConnection());
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xcb_create_gc(xcbConnection(), cid, xpix, 0, NULL);
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xcb_put_image(xcbConnection(), XCB_IMAGE_FORMAT_Z_PIXMAP, xpix, cid, img.width(), img.height(),
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0, 0, 0, depth, img.byteCount(), img.constBits());
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xcb_free_gc(xcbConnection(), cid);
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xcb_flush(xcbConnection());
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emit screenshotCreated(xpix);
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m_windowMode = WindowMode::NoCapture;
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} else if (m_windowMode == WindowMode::File) {
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sendReplyImage(img);
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} else if (m_windowMode == WindowMode::FileDescriptor) {
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QtConcurrent::run(
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[] (int fd, const QImage &img) {
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QFile file;
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if (file.open(fd, QIODevice::WriteOnly, QFileDevice::AutoCloseHandle)) {
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QDataStream ds(&file);
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ds << img;
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file.close();
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} else {
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close(fd);
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}
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}, m_fd, img);
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m_windowMode = WindowMode::NoCapture;
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m_fd = -1;
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}
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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if (xImage) {
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xcb_image_destroy(xImage);
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}
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#endif
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}
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m_scheduledScreenshot = NULL;
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}
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if (!m_scheduledGeometry.isNull()) {
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if (!m_cachedOutputGeometry.isNull()) {
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// special handling for per-output geometry rendering
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const QRect intersection = m_scheduledGeometry.intersected(m_cachedOutputGeometry);
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if (intersection.isEmpty()) {
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// doesn't intersect, not going onto this screenshot
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return;
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}
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const QImage img = blitScreenshot(intersection);
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if (img.size() == m_scheduledGeometry.size()) {
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// we are done
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sendReplyImage(img);
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return;
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}
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if (m_multipleOutputsImage.isNull()) {
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m_multipleOutputsImage = QImage(m_scheduledGeometry.size(), QImage::Format_ARGB32);
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m_multipleOutputsImage.fill(Qt::transparent);
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}
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QPainter p;
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p.begin(&m_multipleOutputsImage);
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p.drawImage(intersection.topLeft() - m_scheduledGeometry.topLeft(), img);
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p.end();
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m_multipleOutputsRendered = m_multipleOutputsRendered.united(intersection);
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if (m_multipleOutputsRendered.boundingRect() == m_scheduledGeometry) {
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sendReplyImage(m_multipleOutputsImage);
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}
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} else {
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const QImage img = blitScreenshot(m_scheduledGeometry);
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sendReplyImage(img);
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}
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}
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}
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void ScreenShotEffect::sendReplyImage(const QImage &img)
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{
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if (m_fd != -1) {
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QtConcurrent::run(
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[] (int fd, const QImage &img) {
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QFile file;
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if (file.open(fd, QIODevice::WriteOnly, QFileDevice::AutoCloseHandle)) {
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QDataStream ds(&file);
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ds << img;
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file.close();
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} else {
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close(fd);
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}
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}, m_fd, img);
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m_fd = -1;
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} else {
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QDBusConnection::sessionBus().send(m_replyMessage.createReply(saveTempImage(img)));
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}
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m_scheduledGeometry = QRect();
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m_multipleOutputsImage = QImage();
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m_multipleOutputsRendered = QRegion();
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m_captureCursor = false;
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m_windowMode = WindowMode::NoCapture;
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}
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QString ScreenShotEffect::saveTempImage(const QImage &img)
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{
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if (img.isNull()) {
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return QString();
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}
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QTemporaryFile temp(QDir::tempPath() + QDir::separator() + QLatin1String("kwin_screenshot_XXXXXX.png"));
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temp.setAutoRemove(false);
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if (!temp.open()) {
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return QString();
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}
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img.save(&temp);
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temp.close();
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KNotification::event(KNotification::Notification,
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i18nc("Notification caption that a screenshot got saved to file", "Screenshot"),
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i18nc("Notification with path to screenshot file", "Screenshot saved to %1", temp.fileName()),
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QStringLiteral("spectacle"));
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return temp.fileName();
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}
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void ScreenShotEffect::screenshotWindowUnderCursor(int mask)
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{
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if (isTakingScreenshot()) {
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sendErrorReply(s_errorAlreadyTaking, s_errorAlreadyTakingMsg);
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return;
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}
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m_type = (ScreenShotType)mask;
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const QPoint cursor = effects->cursorPos();
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EffectWindowList order = effects->stackingOrder();
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EffectWindowList::const_iterator it = order.constEnd(), first = order.constBegin();
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while( it != first ) {
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m_scheduledScreenshot = *(--it);
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if (m_scheduledScreenshot->isOnCurrentDesktop() &&
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!m_scheduledScreenshot->isMinimized() && !m_scheduledScreenshot->isDeleted() &&
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m_scheduledScreenshot->geometry().contains(cursor))
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break;
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m_scheduledScreenshot = 0;
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}
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if (m_scheduledScreenshot) {
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m_scheduledScreenshot->addRepaintFull();
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}
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}
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void ScreenShotEffect::screenshotForWindow(qulonglong winid, int mask)
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{
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m_type = (ScreenShotType) mask;
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EffectWindow* w = effects->findWindow(winid);
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if(w && !w->isMinimized() && !w->isDeleted()) {
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m_windowMode = WindowMode::Xpixmap;
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m_scheduledScreenshot = w;
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m_scheduledScreenshot->addRepaintFull();
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}
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}
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QString ScreenShotEffect::interactive(int mask)
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{
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if (!calledFromDBus()) {
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return QString();
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}
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if (isTakingScreenshot()) {
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sendErrorReply(s_errorAlreadyTaking, s_errorAlreadyTakingMsg);
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return QString();
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}
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m_type = (ScreenShotType) mask;
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m_windowMode = WindowMode::File;
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m_replyMessage = message();
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setDelayedReply(true);
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effects->startInteractiveWindowSelection(
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[this] (EffectWindow *w) {
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hideInfoMessage();
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if (!w) {
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QDBusConnection::sessionBus().send(m_replyMessage.createErrorReply(s_errorCancelled, s_errorCancelledMsg));
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m_windowMode = WindowMode::NoCapture;
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return;
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} else {
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m_scheduledScreenshot = w;
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m_scheduledScreenshot->addRepaintFull();
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}
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});
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showInfoMessage(InfoMessageMode::Window);
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return QString();
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}
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void ScreenShotEffect::interactive(QDBusUnixFileDescriptor fd, int mask)
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{
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if (!calledFromDBus()) {
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return;
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}
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if (isTakingScreenshot()) {
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sendErrorReply(s_errorAlreadyTaking, s_errorAlreadyTakingMsg);
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return;
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}
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m_fd = dup(fd.fileDescriptor());
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if (m_fd == -1) {
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sendErrorReply(s_errorFd, s_errorFdMsg);
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return;
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}
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m_type = (ScreenShotType) mask;
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m_windowMode = WindowMode::FileDescriptor;
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effects->startInteractiveWindowSelection(
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[this] (EffectWindow *w) {
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hideInfoMessage();
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if (!w) {
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close(m_fd);
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m_fd = -1;
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m_windowMode = WindowMode::NoCapture;
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return;
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} else {
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m_scheduledScreenshot = w;
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m_scheduledScreenshot->addRepaintFull();
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}
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});
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showInfoMessage(InfoMessageMode::Window);
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}
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void ScreenShotEffect::showInfoMessage(InfoMessageMode mode)
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{
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QString text;
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switch (mode) {
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case InfoMessageMode::Window:
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text = i18n("Select window to screen shot with left click or enter.\nEscape or right click to cancel.");
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break;
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case InfoMessageMode::Screen:
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text = i18n("Create screen shot with left click or enter.\nEscape or right click to cancel.");
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break;
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}
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effects->showOnScreenMessage(text, QStringLiteral("spectacle"));
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}
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void ScreenShotEffect::hideInfoMessage()
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{
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effects->hideOnScreenMessage(EffectsHandler::OnScreenMessageHideFlag::SkipsCloseAnimation);
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}
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QString ScreenShotEffect::screenshotFullscreen(bool captureCursor)
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{
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if (!calledFromDBus()) {
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return QString();
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}
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if (isTakingScreenshot()) {
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sendErrorReply(s_errorAlreadyTaking, s_errorAlreadyTakingMsg);
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return QString();
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}
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m_replyMessage = message();
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setDelayedReply(true);
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m_scheduledGeometry = effects->virtualScreenGeometry();
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m_captureCursor = captureCursor;
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effects->addRepaintFull();
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return QString();
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}
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void ScreenShotEffect::screenshotFullscreen(QDBusUnixFileDescriptor fd, bool captureCursor)
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{
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if (!calledFromDBus()) {
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return;
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}
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if (isTakingScreenshot()) {
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sendErrorReply(s_errorAlreadyTaking, s_errorAlreadyTakingMsg);
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return;
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}
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m_fd = dup(fd.fileDescriptor());
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if (m_fd == -1) {
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sendErrorReply(s_errorFd, s_errorFdMsg);
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return;
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}
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m_captureCursor = captureCursor;
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showInfoMessage(InfoMessageMode::Screen);
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effects->startInteractivePositionSelection(
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[this] (const QPoint &p) {
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hideInfoMessage();
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if (p == QPoint(-1, -1)) {
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// error condition
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close(m_fd);
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m_fd = -1;
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} else {
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m_scheduledGeometry = effects->virtualScreenGeometry();
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effects->addRepaint(m_scheduledGeometry);
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}
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}
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);
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}
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QString ScreenShotEffect::screenshotScreen(int screen, bool captureCursor)
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{
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if (!calledFromDBus()) {
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return QString();
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}
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if (isTakingScreenshot()) {
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sendErrorReply(s_errorAlreadyTaking, s_errorAlreadyTakingMsg);
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return QString();
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}
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m_scheduledGeometry = effects->clientArea(FullScreenArea, screen, 0);
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if (m_scheduledGeometry.isNull()) {
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sendErrorReply(s_errorInvalidScreen, s_errorInvalidScreenMsg);
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return QString();
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}
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m_captureCursor = captureCursor;
|
|
m_replyMessage = message();
|
|
setDelayedReply(true);
|
|
effects->addRepaint(m_scheduledGeometry);
|
|
return QString();
|
|
}
|
|
|
|
void ScreenShotEffect::screenshotScreen(QDBusUnixFileDescriptor fd, bool captureCursor)
|
|
{
|
|
if (!calledFromDBus()) {
|
|
return;
|
|
}
|
|
if (isTakingScreenshot()) {
|
|
sendErrorReply(s_errorAlreadyTaking, s_errorAlreadyTakingMsg);
|
|
return;
|
|
}
|
|
m_fd = dup(fd.fileDescriptor());
|
|
if (m_fd == -1) {
|
|
sendErrorReply(s_errorFd, s_errorFdMsg);
|
|
return;
|
|
}
|
|
m_captureCursor = captureCursor;
|
|
|
|
showInfoMessage(InfoMessageMode::Screen);
|
|
effects->startInteractivePositionSelection(
|
|
[this] (const QPoint &p) {
|
|
hideInfoMessage();
|
|
if (p == QPoint(-1, -1)) {
|
|
// error condition
|
|
close(m_fd);
|
|
m_fd = -1;
|
|
} else {
|
|
m_scheduledGeometry = effects->clientArea(FullScreenArea, effects->screenNumber(p), 0);
|
|
if (m_scheduledGeometry.isNull()) {
|
|
close(m_fd);
|
|
m_fd = -1;
|
|
return;
|
|
}
|
|
effects->addRepaint(m_scheduledGeometry);
|
|
}
|
|
}
|
|
);
|
|
}
|
|
|
|
QString ScreenShotEffect::screenshotArea(int x, int y, int width, int height, bool captureCursor)
|
|
{
|
|
if (!calledFromDBus()) {
|
|
return QString();
|
|
}
|
|
if (isTakingScreenshot()) {
|
|
sendErrorReply(s_errorAlreadyTaking, s_errorAlreadyTakingMsg);
|
|
return QString();
|
|
}
|
|
m_scheduledGeometry = QRect(x, y, width, height);
|
|
if (m_scheduledGeometry.isNull() || m_scheduledGeometry.isEmpty()) {
|
|
m_scheduledGeometry = QRect();
|
|
sendErrorReply(s_errorInvalidArea, s_errorInvalidAreaMsg);
|
|
return QString();
|
|
}
|
|
m_captureCursor = captureCursor;
|
|
m_replyMessage = message();
|
|
setDelayedReply(true);
|
|
effects->addRepaint(m_scheduledGeometry);
|
|
return QString();
|
|
}
|
|
|
|
QImage ScreenShotEffect::blitScreenshot(const QRect &geometry)
|
|
{
|
|
QImage img;
|
|
if (effects->isOpenGLCompositing())
|
|
{
|
|
if (!GLRenderTarget::blitSupported()) {
|
|
qCDebug(KWINEFFECTS) << "Framebuffer Blit not supported";
|
|
return img;
|
|
}
|
|
GLTexture tex(GL_RGBA8, geometry.width(), geometry.height());
|
|
GLRenderTarget target(tex);
|
|
target.blitFromFramebuffer(geometry);
|
|
// copy content from framebuffer into image
|
|
tex.bind();
|
|
img = QImage(geometry.size(), QImage::Format_ARGB32);
|
|
if (GLPlatform::instance()->isGLES()) {
|
|
glReadPixels(0, 0, img.width(), img.height(), GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid*)img.bits());
|
|
} else {
|
|
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid*)img.bits());
|
|
}
|
|
tex.unbind();
|
|
ScreenShotEffect::convertFromGLImage(img, geometry.width(), geometry.height());
|
|
}
|
|
|
|
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
|
|
if (effects->compositingType() == XRenderCompositing) {
|
|
xcb_image_t *xImage = NULL;
|
|
img = xPictureToImage(effects->xrenderBufferPicture(), geometry, &xImage);
|
|
if (xImage) {
|
|
xcb_image_destroy(xImage);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (m_captureCursor) {
|
|
grabPointerImage(img, geometry.x(), geometry.y());
|
|
}
|
|
|
|
return img;
|
|
}
|
|
|
|
void ScreenShotEffect::grabPointerImage(QImage& snapshot, int offsetx, int offsety)
|
|
{
|
|
const auto cursor = effects->cursorImage();
|
|
if (cursor.image().isNull())
|
|
return;
|
|
|
|
QPainter painter(&snapshot);
|
|
painter.drawImage(effects->cursorPos() - cursor.hotSpot() - QPoint(offsetx, offsety), cursor.image());
|
|
}
|
|
|
|
void ScreenShotEffect::convertFromGLImage(QImage &img, int w, int h)
|
|
{
|
|
// from QtOpenGL/qgl.cpp
|
|
// Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
|
|
// see http://qt.gitorious.org/qt/qt/blobs/master/src/opengl/qgl.cpp
|
|
if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
|
|
// OpenGL gives RGBA; Qt wants ARGB
|
|
uint *p = (uint*)img.bits();
|
|
uint *end = p + w * h;
|
|
while (p < end) {
|
|
uint a = *p << 24;
|
|
*p = (*p >> 8) | a;
|
|
p++;
|
|
}
|
|
} else {
|
|
// OpenGL gives ABGR (i.e. RGBA backwards); Qt wants ARGB
|
|
for (int y = 0; y < h; y++) {
|
|
uint *q = (uint*)img.scanLine(y);
|
|
for (int x = 0; x < w; ++x) {
|
|
const uint pixel = *q;
|
|
*q = ((pixel << 16) & 0xff0000) | ((pixel >> 16) & 0xff)
|
|
| (pixel & 0xff00ff00);
|
|
|
|
q++;
|
|
}
|
|
}
|
|
|
|
}
|
|
img = img.mirrored();
|
|
}
|
|
|
|
bool ScreenShotEffect::isActive() const
|
|
{
|
|
return (m_scheduledScreenshot != NULL || !m_scheduledGeometry.isNull()) && !effects->isScreenLocked();
|
|
}
|
|
|
|
void ScreenShotEffect::windowClosed( EffectWindow* w )
|
|
{
|
|
if (w == m_scheduledScreenshot) {
|
|
m_scheduledScreenshot = NULL;
|
|
screenshotWindowUnderCursor(m_type);
|
|
}
|
|
}
|
|
|
|
bool ScreenShotEffect::isTakingScreenshot() const
|
|
{
|
|
if (!m_scheduledGeometry.isNull()) {
|
|
return true;
|
|
}
|
|
if (m_windowMode != WindowMode::NoCapture) {
|
|
return true;
|
|
}
|
|
if (m_fd != -1) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
} // namespace
|