b7be3cb621
With QtQuick2 it's possible that the scene graph rendering context either lives in an own thread or uses the main GUI thread. In the latter case it's the same thread as our compositing OpenGL context lives in. This means our basic assumption that between two rendering passes the context stays current does not hold. The code already ensured that before we start a rendering pass the context is made current, but there are many more possible cases. If we use OpenGL in areas not triggered by the rendering loop but in response to other events the context needs to be made current. This includes the loading and unloading of effects (some effects use OpenGL in the static effect check, in the ctor and dtor), background loading of texture data, lazy loading after first usage invoked by shortcut, etc. etc. To properly handle these cases new methods are added to EffectsHandler to make the compositing OpenGL context current. These calls delegate down into the scene. On non-OpenGL scenes they are noop, but on OpenGL they go into the backend and make the context current. In addition they ensure that Qt doesn't think that it's QOpenGLContext is current by calling doneCurrent() on the QOpenGLContext::currentContext(). This unfortunately causes an additional call to makeCurrent with a null context, but there is no other way to tell Qt - it doesn't notice when a different context is made current with low level API calls. In the multi-threaded architecture this doesn't matter as ::currentContext() returns null. A short evaluation showed that a transition to QOpenGLContext doesn't seem feasible. Qt only supports either GLX or EGL while KWin supports both and when entering the transition phase for Wayland, it would become extremely tricky if our native platform is X11, but we want a Wayland EGL context. A future solution might be to have a "KWin-QPA plugin" which uses either xcb or Wayland and hides everything from Qt. The API documentation is extended to describe when the effects-framework ensures that an OpenGL context is current. The effects are changed to make the context current in cases where it's not guaranteed. This has been done by looking for creation or deletion of GLTextures and Shaders. If there are other OpenGL usages outside the rendering loop, ctor/dtor this needs to be changed, too.
421 lines
15 KiB
C++
421 lines
15 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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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 "startupfeedback.h"
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// Qt
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#include <QDebug>
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#include <QSize>
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#include <QtCore/QStandardPaths>
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#include <QtGui/QPainter>
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// KDE
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#include <KDE/KConfigGroup>
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#include <KDE/KIconLoader>
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#include <KDE/KStartupInfo>
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#include <KDE/KSelectionOwner>
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// KWin
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#include <kwinglutils.h>
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// X11
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#include <X11/Xcursor/Xcursor.h>
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// based on StartupId in KRunner by Lubos Lunak
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// Copyright (C) 2001 Lubos Lunak <l.lunak@kde.org>
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namespace KWin
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{
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KWIN_EFFECT(startupfeedback, StartupFeedbackEffect)
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KWIN_EFFECT_SUPPORTED(startupfeedback, StartupFeedbackEffect::supported())
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// number of key frames for bouncing animation
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static const int BOUNCE_FRAMES = 20;
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// duration between two key frames in msec
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static const int BOUNCE_FRAME_DURATION = 30;
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// duration of one bounce animation
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static const int BOUNCE_DURATION = BOUNCE_FRAME_DURATION * BOUNCE_FRAMES;
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// number of key frames for blinking animation
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static const int BLINKING_FRAMES = 5;
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// duration between two key frames in msec
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static const int BLINKING_FRAME_DURATION = 100;
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// duration of one blinking animation
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static const int BLINKING_DURATION = BLINKING_FRAME_DURATION * BLINKING_FRAMES;
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//const int color_to_pixmap[] = { 0, 1, 2, 3, 2, 1 };
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static const int FRAME_TO_BOUNCE_YOFFSET[] = {
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-5, -1, 2, 5, 8, 10, 12, 13, 15, 15, 15, 15, 14, 12, 10, 8, 5, 2, -1, -5
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};
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static const QSize BOUNCE_SIZES[] = {
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QSize(16, 16), QSize(14, 18), QSize(12, 20), QSize(18, 14), QSize(20, 12)
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};
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static const int FRAME_TO_BOUNCE_TEXTURE[] = {
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0, 0, 0, 1, 2, 2, 1, 0, 3, 4, 4, 3, 0, 1, 2, 2, 1, 0, 0, 0
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};
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static const int FRAME_TO_BLINKING_COLOR[] = {
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0, 1, 2, 3, 2, 1
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};
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static const QColor BLINKING_COLORS[] = {
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Qt::black, Qt::darkGray, Qt::lightGray, Qt::white, Qt::white
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};
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StartupFeedbackEffect::StartupFeedbackEffect()
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: m_bounceSizesRatio(1.0)
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, m_startupInfo(new KStartupInfo(KStartupInfo::CleanOnCantDetect, this))
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, m_selection(new KSelectionOwner("_KDE_STARTUP_FEEDBACK", -1, this))
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, m_active(false)
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, m_frame(0)
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, m_progress(0)
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, m_texture(0)
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, m_type(BouncingFeedback)
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, m_blinkingShader(0)
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{
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for (int i = 0; i < 5; ++i) {
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m_bouncingTextures[i] = 0;
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}
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m_selection->claim(true);
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connect(m_startupInfo, SIGNAL(gotNewStartup(KStartupInfoId,KStartupInfoData)), SLOT(gotNewStartup(KStartupInfoId,KStartupInfoData)));
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connect(m_startupInfo, SIGNAL(gotRemoveStartup(KStartupInfoId,KStartupInfoData)), SLOT(gotRemoveStartup(KStartupInfoId,KStartupInfoData)));
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connect(m_startupInfo, SIGNAL(gotStartupChange(KStartupInfoId,KStartupInfoData)), SLOT(gotStartupChange(KStartupInfoId,KStartupInfoData)));
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connect(effects, SIGNAL(mouseChanged(QPoint,QPoint,Qt::MouseButtons,Qt::MouseButtons,Qt::KeyboardModifiers,Qt::KeyboardModifiers)),
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this, SLOT(slotMouseChanged(QPoint,QPoint,Qt::MouseButtons,Qt::MouseButtons,Qt::KeyboardModifiers,Qt::KeyboardModifiers)));
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reconfigure(ReconfigureAll);
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}
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StartupFeedbackEffect::~StartupFeedbackEffect()
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{
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if (m_active) {
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effects->stopMousePolling();
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}
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for (int i = 0; i < 5; ++i) {
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delete m_bouncingTextures[i];
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}
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delete m_texture;
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delete m_blinkingShader;
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}
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bool StartupFeedbackEffect::supported()
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{
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return effects->isOpenGLCompositing();
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}
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void StartupFeedbackEffect::reconfigure(Effect::ReconfigureFlags flags)
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{
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Q_UNUSED(flags)
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KConfig conf(QStringLiteral("klaunchrc"), KConfig::NoGlobals);
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KConfigGroup c = conf.group("FeedbackStyle");
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const bool busyCursor = c.readEntry("BusyCursor", true);
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c = conf.group("BusyCursorSettings");
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m_startupInfo->setTimeout(c.readEntry("Timeout", 30));
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const bool busyBlinking = c.readEntry("Blinking", false);
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const bool busyBouncing = c.readEntry("Bouncing", true);
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if (!busyCursor)
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m_type = NoFeedback;
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else if (busyBouncing)
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m_type = BouncingFeedback;
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else if (busyBlinking) {
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m_type = BlinkingFeedback;
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if (effects->compositingType() == OpenGL2Compositing) {
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delete m_blinkingShader;
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m_blinkingShader = 0;
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const QString shader = QStandardPaths::locate(QStandardPaths::GenericDataLocation, QStringLiteral("kwin/blinking-startup-fragment.glsl"));
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m_blinkingShader = ShaderManager::instance()->loadFragmentShader(ShaderManager::SimpleShader, shader);
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if (m_blinkingShader->isValid()) {
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qDebug() << "Blinking Shader is valid";
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} else {
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qDebug() << "Blinking Shader is not valid";
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}
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}
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} else
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m_type = PassiveFeedback;
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if (m_active) {
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stop();
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start(m_startups[ m_currentStartup ]);
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}
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}
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void StartupFeedbackEffect::prePaintScreen(ScreenPrePaintData& data, int time)
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{
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if (m_active) {
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// need the unclipped version
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switch(m_type) {
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case BouncingFeedback:
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m_progress = (m_progress + time) % BOUNCE_DURATION;
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m_frame = qRound((qreal)m_progress / (qreal)BOUNCE_FRAME_DURATION) % BOUNCE_FRAMES;
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m_currentGeometry = feedbackRect(); // bounce alters geometry with m_frame
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data.paint.unite(m_currentGeometry);
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break;
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case BlinkingFeedback:
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m_progress = (m_progress + time) % BLINKING_DURATION;
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m_frame = qRound((qreal)m_progress / (qreal)BLINKING_FRAME_DURATION) % BLINKING_FRAMES;
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break;
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default:
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break; // nothing
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}
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}
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effects->prePaintScreen(data, time);
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}
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void StartupFeedbackEffect::paintScreen(int mask, QRegion region, ScreenPaintData& data)
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{
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effects->paintScreen(mask, region, data);
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if (m_active) {
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GLTexture* texture;
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switch(m_type) {
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case BouncingFeedback:
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texture = m_bouncingTextures[ FRAME_TO_BOUNCE_TEXTURE[ m_frame ]];
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break;
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case BlinkingFeedback: // fall through
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case PassiveFeedback:
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texture = m_texture;
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break;
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default:
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return; // safety
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}
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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texture->bind();
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bool useShader = false;
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if (m_type == BlinkingFeedback) {
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const QColor& blinkingColor = BLINKING_COLORS[ FRAME_TO_BLINKING_COLOR[ m_frame ]];
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if (m_blinkingShader && m_blinkingShader->isValid()) {
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useShader = true;
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ShaderManager::instance()->pushShader(m_blinkingShader);
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m_blinkingShader->setUniform("u_color", blinkingColor);
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} else {
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#ifdef KWIN_HAVE_OPENGL_1
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// texture transformation
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float color[4] = { static_cast<float>(blinkingColor.redF()), static_cast<float>(blinkingColor.greenF()),
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static_cast<float>(blinkingColor.blueF()), 1.0f };
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glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
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glColor4fv(color);
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glActiveTexture(GL_TEXTURE1);
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texture->bind();
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glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
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glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_REPLACE);
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glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_PREVIOUS);
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glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE);
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glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_CONSTANT);
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glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, color);
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glActiveTexture(GL_TEXTURE0);
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glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, color);
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#endif
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}
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} else if (effects->compositingType() == OpenGL2Compositing) {
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useShader = true;
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ShaderManager::instance()->pushShader(ShaderManager::SimpleShader);
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}
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texture->render(m_currentGeometry, m_currentGeometry);
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if (useShader) {
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ShaderManager::instance()->popShader();
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}
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if (m_type == BlinkingFeedback && !useShader) {
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#ifdef KWIN_HAVE_OPENGL_1
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// resture states
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glActiveTexture(GL_TEXTURE1);
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texture->unbind();
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glActiveTexture(GL_TEXTURE0);
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glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
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glColor4f(0.0f, 0.0f, 0.0f, 0.0f);
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#endif
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}
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texture->unbind();
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glDisable(GL_BLEND);
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}
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}
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void StartupFeedbackEffect::postPaintScreen()
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{
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if (m_active) {
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m_dirtyRect = m_currentGeometry; // ensure the now dirty region is cleaned on the next pass
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if (m_type == BlinkingFeedback || m_type == BouncingFeedback)
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effects->addRepaint(m_dirtyRect); // we also have to trigger a repaint
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}
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effects->postPaintScreen();
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}
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void StartupFeedbackEffect::slotMouseChanged(const QPoint& pos, const QPoint& oldpos, Qt::MouseButtons buttons,
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Qt::MouseButtons oldbuttons, Qt::KeyboardModifiers modifiers, Qt::KeyboardModifiers oldmodifiers)
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{
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Q_UNUSED(pos)
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Q_UNUSED(oldpos)
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Q_UNUSED(buttons)
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Q_UNUSED(oldbuttons)
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Q_UNUSED(modifiers)
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Q_UNUSED(oldmodifiers)
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if (m_active) {
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m_dirtyRect |= m_currentGeometry;
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m_currentGeometry = feedbackRect();
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m_dirtyRect |= m_currentGeometry;
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effects->addRepaint(m_dirtyRect);
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}
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}
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void StartupFeedbackEffect::gotNewStartup(const KStartupInfoId& id, const KStartupInfoData& data)
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{
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const QString& icon = data.findIcon();
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m_currentStartup = id;
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m_startups[ id ] = icon;
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start(icon);
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}
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void StartupFeedbackEffect::gotRemoveStartup(const KStartupInfoId& id, const KStartupInfoData& data)
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{
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Q_UNUSED( data )
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m_startups.remove(id);
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if (m_startups.count() == 0) {
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m_currentStartup = KStartupInfoId(); // null
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stop();
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return;
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}
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m_currentStartup = m_startups.begin().key();
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start(m_startups[ m_currentStartup ]);
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}
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void StartupFeedbackEffect::gotStartupChange(const KStartupInfoId& id, const KStartupInfoData& data)
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{
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if (m_currentStartup == id) {
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const QString& icon = data.findIcon();
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if (!icon.isEmpty() && icon != m_startups[ m_currentStartup ]) {
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m_startups[ id ] = icon;
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start(icon);
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}
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}
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}
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void StartupFeedbackEffect::start(const QString& icon)
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{
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if (m_type == NoFeedback)
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return;
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if (!m_active)
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effects->startMousePolling();
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m_active = true;
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// get ratio for bouncing cursor so we don't need to manually calculate the sizes for each icon size
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if (m_type == BouncingFeedback)
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m_bounceSizesRatio = IconSize(KIconLoader::Small) / 16.0;
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QPixmap iconPixmap = KIconLoader::global()->loadIcon(icon, KIconLoader::Small, 0,
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KIconLoader::DefaultState, QStringList(), 0, true); // return null pixmap if not found
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if (iconPixmap.isNull())
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iconPixmap = SmallIcon(QStringLiteral("system-run"));
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prepareTextures(iconPixmap);
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m_dirtyRect = m_currentGeometry = feedbackRect();
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effects->addRepaint(m_dirtyRect);
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}
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void StartupFeedbackEffect::stop()
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{
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if (m_active)
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effects->stopMousePolling();
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m_active = false;
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effects->makeOpenGLContextCurrent();
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switch(m_type) {
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case BouncingFeedback:
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for (int i = 0; i < 5; ++i) {
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delete m_bouncingTextures[i];
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m_bouncingTextures[i] = 0;
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}
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break;
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case BlinkingFeedback:
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case PassiveFeedback:
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delete m_texture;
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m_texture = 0;
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break;
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case NoFeedback:
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return; // don't want the full repaint
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default:
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break; // impossible
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}
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effects->addRepaintFull();
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}
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void StartupFeedbackEffect::prepareTextures(const QPixmap& pix)
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{
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effects->makeOpenGLContextCurrent();
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switch(m_type) {
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case BouncingFeedback:
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for (int i = 0; i < 5; ++i) {
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delete m_bouncingTextures[i];
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m_bouncingTextures[i] = new GLTexture(scalePixmap(pix, BOUNCE_SIZES[i]));
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}
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break;
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case BlinkingFeedback:
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case PassiveFeedback:
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m_texture = new GLTexture(pix);
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break;
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default:
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// for safety
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m_active = false;
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break;
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}
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}
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QImage StartupFeedbackEffect::scalePixmap(const QPixmap& pm, const QSize& size) const
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{
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const QSize& adjustedSize = size * m_bounceSizesRatio;
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QImage scaled = pm.toImage().scaled(adjustedSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
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if (scaled.format() != QImage::Format_ARGB32_Premultiplied && scaled.format() != QImage::Format_ARGB32)
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scaled = scaled.convertToFormat(QImage::Format_ARGB32);
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QImage result(20 * m_bounceSizesRatio, 20 * m_bounceSizesRatio, QImage::Format_ARGB32);
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QPainter p(&result);
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p.setCompositionMode(QPainter::CompositionMode_Source);
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p.fillRect(result.rect(), Qt::transparent);
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p.drawImage((20 * m_bounceSizesRatio - adjustedSize.width()) / 2, (20*m_bounceSizesRatio - adjustedSize.height()) / 2, scaled, 0, 0, adjustedSize.width(), adjustedSize.height() * m_bounceSizesRatio);
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return result;
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}
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QRect StartupFeedbackEffect::feedbackRect() const
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{
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int cursorSize = 0;
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cursorSize = XcursorGetDefaultSize(QX11Info::display());
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int xDiff;
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if (cursorSize <= 16)
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xDiff = 8 + 7;
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else if (cursorSize <= 32)
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xDiff = 16 + 7;
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else if (cursorSize <= 48)
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xDiff = 24 + 7;
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else
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xDiff = 32 + 7;
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int yDiff = xDiff;
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GLTexture* texture = 0;
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int yOffset = 0;
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switch(m_type) {
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case BouncingFeedback:
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texture = m_bouncingTextures[ FRAME_TO_BOUNCE_TEXTURE[ m_frame ]];
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yOffset = FRAME_TO_BOUNCE_YOFFSET[ m_frame ] * m_bounceSizesRatio;
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break;
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case BlinkingFeedback: // fall through
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case PassiveFeedback:
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texture = m_texture;
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break;
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default:
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// nothing
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break;
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}
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const QPoint cursorPos = effects->cursorPos() + QPoint(xDiff, yDiff + yOffset);
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QRect rect;
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if( texture )
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rect = QRect(cursorPos, texture->size());
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return rect;
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}
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bool StartupFeedbackEffect::isActive() const
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{
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return m_active;
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}
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} // namespace
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