576c667124
Summary: If updating a shadow means that there should be no shadow, shadow ends up deleting itself midway through the method. It's cleaner and safer to leave that to the caller. This new change matches the existing documentation for Shadow::updateShadow which states > In case the Property has been withdrawn the method returns @c false. > In that case the owner should delete the Shadow. Test Plan: Created an ASAN of kwin Relevant testMaximised no longer fails Reviewers: #kwin, zzag Reviewed By: #kwin, zzag Subscribers: kwin Tags: #kwin Differential Revision: https://phabricator.kde.org/D17380
425 lines
17 KiB
C++
425 lines
17 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) 2011 Martin Gräßlin <mgraesslin@kde.org>
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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 "shadow.h"
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// kwin
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#include "atoms.h"
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#include "abstract_client.h"
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#include "composite.h"
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#include "effects.h"
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#include "toplevel.h"
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#include "wayland_server.h"
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#include <KDecoration2/Decoration>
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#include <KDecoration2/DecorationShadow>
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#include <KWayland/Server/buffer_interface.h>
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#include <KWayland/Server/shadow_interface.h>
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#include <KWayland/Server/surface_interface.h>
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namespace KWin
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{
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Shadow::Shadow(Toplevel *toplevel)
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: m_topLevel(toplevel)
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, m_cachedSize(toplevel->geometry().size())
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, m_decorationShadow(nullptr)
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{
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connect(m_topLevel, SIGNAL(geometryChanged()), SLOT(geometryChanged()));
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}
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Shadow::~Shadow()
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{
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}
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Shadow *Shadow::createShadow(Toplevel *toplevel)
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{
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if (!effects) {
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return NULL;
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}
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Shadow *shadow = createShadowFromDecoration(toplevel);
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if (!shadow && waylandServer()) {
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shadow = createShadowFromWayland(toplevel);
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}
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if (!shadow && kwinApp()->x11Connection()) {
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shadow = createShadowFromX11(toplevel);
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}
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if (!shadow) {
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return nullptr;
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}
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if (toplevel->effectWindow() && toplevel->effectWindow()->sceneWindow()) {
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toplevel->effectWindow()->sceneWindow()->updateShadow(shadow);
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emit toplevel->shadowChanged();
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}
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return shadow;
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}
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Shadow *Shadow::createShadowFromX11(Toplevel *toplevel)
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{
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auto data = Shadow::readX11ShadowProperty(toplevel->window());
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if (!data.isEmpty()) {
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Shadow *shadow = Compositor::self()->scene()->createShadow(toplevel);
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if (!shadow->init(data)) {
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delete shadow;
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return NULL;
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}
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return shadow;
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} else {
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return NULL;
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}
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}
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Shadow *Shadow::createShadowFromDecoration(Toplevel *toplevel)
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{
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AbstractClient *c = qobject_cast<AbstractClient*>(toplevel);
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if (!c) {
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return nullptr;
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}
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if (!c->decoration()) {
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return nullptr;
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}
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Shadow *shadow = Compositor::self()->scene()->createShadow(toplevel);
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if (!shadow->init(c->decoration())) {
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delete shadow;
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return nullptr;
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}
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return shadow;
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}
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Shadow *Shadow::createShadowFromWayland(Toplevel *toplevel)
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{
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auto surface = toplevel->surface();
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if (!surface) {
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return nullptr;
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}
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const auto s = surface->shadow();
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if (!s) {
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return nullptr;
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}
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Shadow *shadow = Compositor::self()->scene()->createShadow(toplevel);
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if (!shadow->init(s)) {
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delete shadow;
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return nullptr;
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}
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return shadow;
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}
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QVector< uint32_t > Shadow::readX11ShadowProperty(xcb_window_t id)
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{
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QVector<uint32_t> ret;
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if (id != XCB_WINDOW) {
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Xcb::Property property(false, id, atoms->kde_net_wm_shadow, XCB_ATOM_CARDINAL, 0, 12);
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uint32_t *shadow = property.value<uint32_t*>();
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if (shadow) {
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ret.reserve(12);
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for (int i=0; i<12; ++i) {
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ret << shadow[i];
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}
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}
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}
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return ret;
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}
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bool Shadow::init(const QVector< uint32_t > &data)
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{
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QVector<Xcb::WindowGeometry> pixmapGeometries(ShadowElementsCount);
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QVector<xcb_get_image_cookie_t> getImageCookies(ShadowElementsCount);
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auto *c = connection();
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for (int i = 0; i < ShadowElementsCount; ++i) {
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pixmapGeometries[i] = Xcb::WindowGeometry(data[i]);
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}
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auto discardReplies = [&getImageCookies](int start) {
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for (int i = start; i < getImageCookies.size(); ++i) {
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xcb_discard_reply(connection(), getImageCookies.at(i).sequence);
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}
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};
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for (int i = 0; i < ShadowElementsCount; ++i) {
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auto &geo = pixmapGeometries[i];
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if (geo.isNull()) {
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discardReplies(0);
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return false;
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}
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getImageCookies[i] = xcb_get_image_unchecked(c, XCB_IMAGE_FORMAT_Z_PIXMAP, data[i],
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0, 0, geo->width, geo->height, ~0);
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}
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for (int i = 0; i < ShadowElementsCount; ++i) {
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auto *reply = xcb_get_image_reply(c, getImageCookies.at(i), nullptr);
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if (!reply) {
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discardReplies(i+1);
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return false;
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}
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auto &geo = pixmapGeometries[i];
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QImage image(xcb_get_image_data(reply), geo->width, geo->height, QImage::Format_ARGB32);
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m_shadowElements[i] = QPixmap::fromImage(image);
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free(reply);
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}
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m_topOffset = data[ShadowElementsCount];
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m_rightOffset = data[ShadowElementsCount+1];
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m_bottomOffset = data[ShadowElementsCount+2];
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m_leftOffset = data[ShadowElementsCount+3];
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updateShadowRegion();
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if (!prepareBackend()) {
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return false;
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}
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buildQuads();
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return true;
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}
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bool Shadow::init(KDecoration2::Decoration *decoration)
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{
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if (m_decorationShadow) {
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// disconnect previous connections
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disconnect(m_decorationShadow.data(), &KDecoration2::DecorationShadow::innerShadowRectChanged, m_topLevel, &Toplevel::getShadow);
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disconnect(m_decorationShadow.data(), &KDecoration2::DecorationShadow::shadowChanged, m_topLevel, &Toplevel::getShadow);
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disconnect(m_decorationShadow.data(), &KDecoration2::DecorationShadow::paddingChanged, m_topLevel, &Toplevel::getShadow);
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}
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m_decorationShadow = decoration->shadow();
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if (!m_decorationShadow) {
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return false;
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}
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// setup connections - all just mapped to recreate
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connect(m_decorationShadow.data(), &KDecoration2::DecorationShadow::innerShadowRectChanged, m_topLevel, &Toplevel::getShadow);
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connect(m_decorationShadow.data(), &KDecoration2::DecorationShadow::shadowChanged, m_topLevel, &Toplevel::getShadow);
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connect(m_decorationShadow.data(), &KDecoration2::DecorationShadow::paddingChanged, m_topLevel, &Toplevel::getShadow);
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const QMargins &p = m_decorationShadow->padding();
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m_topOffset = p.top();
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m_rightOffset = p.right();
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m_bottomOffset = p.bottom();
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m_leftOffset = p.left();
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updateShadowRegion();
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if (!prepareBackend()) {
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return false;
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}
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buildQuads();
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return true;
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}
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bool Shadow::init(const QPointer< KWayland::Server::ShadowInterface > &shadow)
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{
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if (!shadow) {
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return false;
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}
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m_shadowElements[ShadowElementTop] = shadow->top() ? QPixmap::fromImage(shadow->top()->data().copy()) : QPixmap();
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m_shadowElements[ShadowElementTopRight] = shadow->topRight() ? QPixmap::fromImage(shadow->topRight()->data().copy()) : QPixmap();
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m_shadowElements[ShadowElementRight] = shadow->right() ? QPixmap::fromImage(shadow->right()->data().copy()) : QPixmap();
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m_shadowElements[ShadowElementBottomRight] = shadow->bottomRight() ? QPixmap::fromImage(shadow->bottomRight()->data().copy()) : QPixmap();
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m_shadowElements[ShadowElementBottom] = shadow->bottom() ? QPixmap::fromImage(shadow->bottom()->data().copy()) : QPixmap();
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m_shadowElements[ShadowElementBottomLeft] = shadow->bottomLeft() ? QPixmap::fromImage(shadow->bottomLeft()->data().copy()) : QPixmap();
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m_shadowElements[ShadowElementLeft] = shadow->left() ? QPixmap::fromImage(shadow->left()->data().copy()) : QPixmap();
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m_shadowElements[ShadowElementTopLeft] = shadow->topLeft() ? QPixmap::fromImage(shadow->topLeft()->data().copy()) : QPixmap();
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const QMarginsF &p = shadow->offset();
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m_topOffset = p.top();
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m_rightOffset = p.right();
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m_bottomOffset = p.bottom();
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m_leftOffset = p.left();
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updateShadowRegion();
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if (!prepareBackend()) {
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return false;
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}
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buildQuads();
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return true;
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}
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void Shadow::updateShadowRegion()
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{
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const QRect top(0, - m_topOffset, m_topLevel->width(), m_topOffset);
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const QRect right(m_topLevel->width(), - m_topOffset, m_rightOffset, m_topLevel->height() + m_topOffset + m_bottomOffset);
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const QRect bottom(0, m_topLevel->height(), m_topLevel->width(), m_bottomOffset);
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const QRect left(- m_leftOffset, - m_topOffset, m_leftOffset, m_topLevel->height() + m_topOffset + m_bottomOffset);
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m_shadowRegion = QRegion(top).united(right).united(bottom).united(left);
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}
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void Shadow::buildQuads()
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{
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// prepare window quads
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m_shadowQuads.clear();
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const QSize top(m_shadowElements[ShadowElementTop].size());
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const QSize topRight(m_shadowElements[ShadowElementTopRight].size());
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const QSize right(m_shadowElements[ShadowElementRight].size());
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const QSize bottomRight(m_shadowElements[ShadowElementBottomRight].size());
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const QSize bottom(m_shadowElements[ShadowElementBottom].size());
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const QSize bottomLeft(m_shadowElements[ShadowElementBottomLeft].size());
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const QSize left(m_shadowElements[ShadowElementLeft].size());
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const QSize topLeft(m_shadowElements[ShadowElementTopLeft].size());
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if ((left.width() - m_leftOffset > m_topLevel->width()) ||
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(right.width() - m_rightOffset > m_topLevel->width()) ||
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(top.height() - m_topOffset > m_topLevel->height()) ||
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(bottom.height() - m_bottomOffset > m_topLevel->height())) {
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// if our shadow is bigger than the window, we don't render the shadow
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m_shadowRegion = QRegion();
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return;
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}
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const QRect outerRect(QPoint(-m_leftOffset, -m_topOffset), QPoint(m_topLevel->width() + m_rightOffset, m_topLevel->height() + m_bottomOffset));
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WindowQuad topLeftQuad(WindowQuadShadowTopLeft);
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topLeftQuad[ 0 ] = WindowVertex(outerRect.x(), outerRect.y(), 0.0, 0.0);
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topLeftQuad[ 1 ] = WindowVertex(outerRect.x() + topLeft.width(), outerRect.y(), 1.0, 0.0);
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topLeftQuad[ 2 ] = WindowVertex(outerRect.x() + topLeft.width(), outerRect.y() + topLeft.height(), 1.0, 1.0);
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topLeftQuad[ 3 ] = WindowVertex(outerRect.x(), outerRect.y() + topLeft.height(), 0.0, 1.0);
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m_shadowQuads.append(topLeftQuad);
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WindowQuad topQuad(WindowQuadShadowTop);
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topQuad[ 0 ] = WindowVertex(outerRect.x() + topLeft.width(), outerRect.y(), 0.0, 0.0);
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topQuad[ 1 ] = WindowVertex(outerRect.right() - topRight.width(), outerRect.y(), 1.0, 0.0);
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topQuad[ 2 ] = WindowVertex(outerRect.right() - topRight.width(), outerRect.y() + top.height(), 1.0, 1.0);
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topQuad[ 3 ] = WindowVertex(outerRect.x() + topLeft.width(), outerRect.y() + top.height(), 0.0, 1.0);
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m_shadowQuads.append(topQuad);
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WindowQuad topRightQuad(WindowQuadShadowTopRight);
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topRightQuad[ 0 ] = WindowVertex(outerRect.right() - topRight.width(), outerRect.y(), 0.0, 0.0);
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topRightQuad[ 1 ] = WindowVertex(outerRect.right(), outerRect.y(), 1.0, 0.0);
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topRightQuad[ 2 ] = WindowVertex(outerRect.right(), outerRect.y() + topRight.height(), 1.0, 1.0);
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topRightQuad[ 3 ] = WindowVertex(outerRect.right() - topRight.width(), outerRect.y() + topRight.height(), 0.0, 1.0);
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m_shadowQuads.append(topRightQuad);
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WindowQuad rightQuad(WindowQuadShadowRight);
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rightQuad[ 0 ] = WindowVertex(outerRect.right() - right.width(), outerRect.y() + topRight.height(), 0.0, 0.0);
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rightQuad[ 1 ] = WindowVertex(outerRect.right(), outerRect.y() + topRight.height(), 1.0, 0.0);
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rightQuad[ 2 ] = WindowVertex(outerRect.right(), outerRect.bottom() - bottomRight.height(), 1.0, 1.0);
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rightQuad[ 3 ] = WindowVertex(outerRect.right() - right.width(), outerRect.bottom() - bottomRight.height(), 0.0, 1.0);
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m_shadowQuads.append(rightQuad);
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WindowQuad bottomRightQuad(WindowQuadShadowBottomRight);
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bottomRightQuad[ 0 ] = WindowVertex(outerRect.right() - bottomRight.width(), outerRect.bottom() - bottomRight.height(), 0.0, 0.0);
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bottomRightQuad[ 1 ] = WindowVertex(outerRect.right(), outerRect.bottom() - bottomRight.height(), 1.0, 0.0);
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bottomRightQuad[ 2 ] = WindowVertex(outerRect.right(), outerRect.bottom(), 1.0, 1.0);
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bottomRightQuad[ 3 ] = WindowVertex(outerRect.right() - bottomRight.width(), outerRect.bottom(), 0.0, 1.0);
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m_shadowQuads.append(bottomRightQuad);
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WindowQuad bottomQuad(WindowQuadShadowBottom);
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bottomQuad[ 0 ] = WindowVertex(outerRect.x() + bottomLeft.width(), outerRect.bottom() - bottom.height(), 0.0, 0.0);
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bottomQuad[ 1 ] = WindowVertex(outerRect.right() - bottomRight.width(), outerRect.bottom() - bottom.height(), 1.0, 0.0);
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bottomQuad[ 2 ] = WindowVertex(outerRect.right() - bottomRight.width(), outerRect.bottom(), 1.0, 1.0);
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bottomQuad[ 3 ] = WindowVertex(outerRect.x() + bottomLeft.width(), outerRect.bottom(), 0.0, 1.0);
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m_shadowQuads.append(bottomQuad);
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WindowQuad bottomLeftQuad(WindowQuadShadowBottomLeft);
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bottomLeftQuad[ 0 ] = WindowVertex(outerRect.x(), outerRect.bottom() - bottomLeft.height(), 0.0, 0.0);
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bottomLeftQuad[ 1 ] = WindowVertex(outerRect.x() + bottomLeft.width(), outerRect.bottom() - bottomLeft.height(), 1.0, 0.0);
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bottomLeftQuad[ 2 ] = WindowVertex(outerRect.x() + bottomLeft.width(), outerRect.bottom(), 1.0, 1.0);
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bottomLeftQuad[ 3 ] = WindowVertex(outerRect.x(), outerRect.bottom(), 0.0, 1.0);
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m_shadowQuads.append(bottomLeftQuad);
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WindowQuad leftQuad(WindowQuadShadowLeft);
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leftQuad[ 0 ] = WindowVertex(outerRect.x(), outerRect.y() + topLeft.height(), 0.0, 0.0);
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leftQuad[ 1 ] = WindowVertex(outerRect.x() + left.width(), outerRect.y() + topLeft.height(), 1.0, 0.0);
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leftQuad[ 2 ] = WindowVertex(outerRect.x() + left.width(), outerRect.bottom() - bottomLeft.height(), 1.0, 1.0);
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leftQuad[ 3 ] = WindowVertex(outerRect.x(), outerRect.bottom() - bottomLeft.height(), 0.0, 1.0);
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m_shadowQuads.append(leftQuad);
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}
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bool Shadow::updateShadow()
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{
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if (!m_topLevel) {
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return false;
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}
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if (m_decorationShadow) {
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if (AbstractClient *c = qobject_cast<AbstractClient*>(m_topLevel)) {
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if (c->decoration()) {
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if (init(c->decoration())) {
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return true;
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}
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}
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}
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return false;
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}
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if (waylandServer()) {
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if (m_topLevel && m_topLevel->surface()) {
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if (const auto &s = m_topLevel->surface()->shadow()) {
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if (init(s)) {
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return true;
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}
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}
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}
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}
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auto data = Shadow::readX11ShadowProperty(m_topLevel->window());
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if (data.isEmpty()) {
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return false;
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}
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init(data);
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return true;
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}
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void Shadow::setToplevel(Toplevel *topLevel)
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{
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m_topLevel = topLevel;
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connect(m_topLevel, SIGNAL(geometryChanged()), SLOT(geometryChanged()));
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}
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void Shadow::geometryChanged()
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{
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if (m_cachedSize == m_topLevel->geometry().size()) {
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return;
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}
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m_cachedSize = m_topLevel->geometry().size();
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updateShadowRegion();
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buildQuads();
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}
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QImage Shadow::decorationShadowImage() const
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{
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if (!m_decorationShadow) {
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return QImage();
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}
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return m_decorationShadow->shadow();
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}
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QSize Shadow::elementSize(Shadow::ShadowElements element) const
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{
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if (m_decorationShadow) {
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switch (element) {
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case ShadowElementTop:
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return m_decorationShadow->topGeometry().size();
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case ShadowElementTopRight:
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return m_decorationShadow->topRightGeometry().size();
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case ShadowElementRight:
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return m_decorationShadow->rightGeometry().size();
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case ShadowElementBottomRight:
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return m_decorationShadow->bottomRightGeometry().size();
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case ShadowElementBottom:
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return m_decorationShadow->bottomGeometry().size();
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case ShadowElementBottomLeft:
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return m_decorationShadow->bottomLeftGeometry().size();
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case ShadowElementLeft:
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return m_decorationShadow->leftGeometry().size();
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case ShadowElementTopLeft:
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return m_decorationShadow->topLeftGeometry().size();
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default:
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return QSize();
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}
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} else {
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return m_shadowElements[element].size();
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}
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}
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void Shadow::setShadowElement(const QPixmap &shadow, Shadow::ShadowElements element)
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{
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m_shadowElements[element] = shadow;
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}
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} // namespace
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