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kwin/effects/logout/logout.cpp

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2007 Lubos Lunak <l.lunak@kde.org>
Copyright (C) 2009 Martin Gräßlin <mgraesslin@kde.org>
Copyright (C) 2009, 2010 Lucas Murray <lmurray@undefinedfire.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "logout.h"
// KConfigSkeleton
#include "logoutconfig.h"
#include "kwinglutils.h"
#include "kwinglplatform.h"
#include <math.h>
#include <QFile>
#include <QtGui/QMatrix4x4>
#include <QtGui/QVector2D>
namespace KWin
{
WindowAttributes::WindowAttributes(const WindowPaintData &data)
{
opacity = data.opacity();
rotation = data.rotationAngle();
rotationAxis = data.rotationAxis();
rotationOrigin = data.rotationOrigin();
scale = QVector3D(data.xScale(), data.yScale(), data.zScale());
translation = data.translation();
}
void WindowAttributes::applyTo(WindowPaintData &data) const
{
data.setOpacity(opacity);
data.translate(translation);
data.setScale(scale);
data.setRotationAngle(rotation);
data.setRotationAxis(rotationAxis);
data.setRotationOrigin(rotationOrigin);
}
LogoutEffect::LogoutEffect()
: progress(0.0)
, displayEffect(false)
, logoutWindow(NULL)
, logoutWindowClosed(true)
, logoutWindowPassed(false)
, logoutAtom(QByteArrayLiteral("_KDE_LOGGING_OUT"))
, canDoPersistent(false)
, ignoredWindows()
, m_vignettingShader(NULL)
, m_blurShader(NULL)
{
if (logoutAtom.isValid()) {
// Persistent effect
effects->registerPropertyType(logoutAtom, true);
}
blurTexture = NULL;
blurTarget = NULL;
reconfigure(ReconfigureAll);
connect(effects, SIGNAL(windowAdded(KWin::EffectWindow*)), this, SLOT(slotWindowAdded(KWin::EffectWindow*)));
connect(effects, SIGNAL(windowClosed(KWin::EffectWindow*)), this, SLOT(slotWindowClosed(KWin::EffectWindow*)));
connect(effects, SIGNAL(windowDeleted(KWin::EffectWindow*)), this, SLOT(slotWindowDeleted(KWin::EffectWindow*)));
connect(effects, SIGNAL(propertyNotify(KWin::EffectWindow*,long)), this, SLOT(slotPropertyNotify(KWin::EffectWindow*,long)));
}
LogoutEffect::~LogoutEffect()
{
delete blurTexture;
delete blurTarget;
delete m_vignettingShader;
delete m_blurShader;
}
void LogoutEffect::reconfigure(ReconfigureFlags)
{
LogoutConfig::self()->read();
frameDelay = 0;
useBlur = LogoutConfig::useBlur();
delete blurTexture;
blurTexture = NULL;
delete blurTarget;
blurTarget = NULL;
blurSupported = false;
delete m_blurShader;
m_blurShader = NULL;
}
void LogoutEffect::prePaintScreen(ScreenPrePaintData& data, int time)
{
if (!displayEffect && progress == 0.0) {
if (blurTexture) {
delete blurTexture;
blurTexture = NULL;
delete blurTarget;
blurTarget = NULL;
blurSupported = false;
}
} else if (!blurTexture) {
blurSupported = false;
delete blurTarget; // catch as we just tested the texture ;-P
if (effects->isOpenGLCompositing() && GLRenderTarget::blitSupported() && !GLPlatform::instance()->supports(LimitedNPOT) && useBlur) {
// TODO: It seems that it is not possible to create a GLRenderTarget that has
// a different size than the display right now. Most likely a KWin core bug.
// Create texture and render target
const QSize size = effects->virtualScreenSize();
// The fragment shader uses a LOD bias of 1.75, so we need 3 mipmap levels.
blurTexture = new GLTexture(GL_RGBA8, size, 3);
blurTexture->setFilter(GL_LINEAR_MIPMAP_LINEAR);
blurTexture->setWrapMode(GL_CLAMP_TO_EDGE);
blurTarget = new GLRenderTarget(*blurTexture);
if (blurTarget->valid())
blurSupported = true;
// As creating the render target takes time it can cause the first two frames of the
// blur animation to be jerky. For this reason we only start the animation after the
// third frame.
frameDelay = 2;
}
}
if (frameDelay)
--frameDelay;
else {
if (displayEffect)
progress = qMin(1.0, progress + time / animationTime(2000.0));
else if (progress > 0.0)
progress = qMax(0.0, progress - time / animationTime(500.0));
}
if (blurSupported && progress > 0.0) {
data.mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;
}
data.paint |= effects->clientArea(FullArea, 0, 0);
effects->prePaintScreen(data, time);
}
void LogoutEffect::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
{
if (progress > 0.0) {
// HACK: All windows past the first ignored one should not be
// blurred as it affects the stacking order.
// All following windows are on top of the logout window and should not be altered either
logoutWindowPassed = (logoutWindowPassed || w == logoutWindow || ignoredWindows.contains(w));
if (effects->isOpenGLCompositing()) {
// In OpenGL mode we add vignetting and, if supported, a slight blur
if (blurSupported) {
// When using blur we render everything to an FBO and as such don't do the vignetting
// until after we render the FBO to the screen.
if (logoutWindowPassed) { // Window is rendered after the FBO
m_windows.append(WinDataPair(w, WindowAttributes(data)));
return; // we paint this in ::paintScreen(), so cut the line here
} else { // Window is added to the FBO
data.multiplySaturation((1.0 - progress * 0.2));
}
} else {
// If we are not blurring then we are not rendering to an FBO
if (w == logoutWindow) {
// This is the logout window don't alter it but render our vignetting now
renderVignetting(data.screenProjectionMatrix());
} else if (logoutWindowPassed) { // Window is in the background, desaturate
data.multiplySaturation((1.0 - progress * 0.2));
} // else ... All other windows are unaltered
}
}
if (effects->compositingType() == KWin::XRenderCompositing) {
// Since we can't do vignetting in XRender just do a stronger desaturation and darken
if (!logoutWindowPassed) {
data.multiplySaturation((1.0 - progress * 0.8));
data.multiplyBrightness((1.0 - progress * 0.3));
}
}
}
effects->paintWindow(w, mask, region, data);
}
void LogoutEffect::paintScreen(int mask, QRegion region, ScreenPaintData& data)
{
effects->paintScreen(mask, region, data);
if (effects->isOpenGLCompositing() && progress > 0.0) {
if (!blurSupported) {
if (!logoutWindowPassed)
// The logout window has been deleted but we still want to fade out the vignetting, thus
// render it on the top of everything if still animating. We don't check if logoutWindow
// is set as it may still be even if it wasn't rendered.
renderVignetting(data.projectionMatrix());
} else {
GLRenderTarget::pushRenderTarget(blurTarget);
blurTarget->blitFromFramebuffer();
GLRenderTarget::popRenderTarget();
//--------------------------
// Render the screen effect
renderBlurTexture(data.projectionMatrix());
// Vignetting (Radial gradient with transparent middle and black edges)
renderVignetting(data.projectionMatrix());
//--------------------------
// Render the logout window and all windows on top
for (int i = 0; i < m_windows.count(); ++i) {
EffectWindow *w = m_windows.at(i).first;
int winMask = PAINT_WINDOW_TRANSLUCENT|PAINT_WINDOW_TRANSFORMED;
WindowPaintData wdata(w);
m_windows.at(i).second.applyTo(wdata);
wdata *= QVector3D(data.xScale(), data.yScale(), data.zScale());
wdata.translate(data.translation());
wdata.translate((data.xScale()-1)*w->x(), (data.yScale()-1)*w->y(), 0);
effects->drawWindow(w, winMask, region, wdata);
}
m_windows.clear();
}
}
}
void LogoutEffect::postPaintScreen()
{
if ((progress != 0.0 && progress != 1.0) || frameDelay)
effects->addRepaintFull();
if (progress > 0.0)
logoutWindowPassed = false;
effects->postPaintScreen();
}
void LogoutEffect::slotWindowAdded(EffectWindow* w)
{
if (isLogoutDialog(w)) {
logoutWindow = w;
logoutWindowClosed = false; // So we don't blur the window on close
progress = 0.0;
displayEffect = true;
ignoredWindows.clear();
effects->addRepaintFull();
} else if (canDoPersistent)
// TODO: Add parent
ignoredWindows.append(w);
}
void LogoutEffect::slotWindowClosed(EffectWindow* w)
{
if (w == logoutWindow) {
logoutWindowClosed = true;
if (!canDoPersistent)
displayEffect = false; // Fade back to normal
effects->addRepaintFull();
}
}
void LogoutEffect::slotWindowDeleted(EffectWindow* w)
{
QList<WinDataPair>::iterator it = m_windows.begin();
while (it != m_windows.end()) {
if (it->first == w)
it = m_windows.erase(it);
else
++it;
}
ignoredWindows.removeAll(w);
if (w == logoutWindow)
logoutWindow = nullptr;
}
bool LogoutEffect::isLogoutDialog(EffectWindow* w)
{
// TODO there should be probably a better way (window type?)
if (w->windowClass() == QStringLiteral("ksmserver ksmserver")
&& (w->windowRole() == QStringLiteral("logoutdialog") || w->windowRole() == QStringLiteral("logouteffect"))) {
return true;
}
return false;
}
void LogoutEffect::renderVignetting(const QMatrix4x4 &projection)
{
if (!m_vignettingShader) {
m_vignettingShader = ShaderManager::instance()->generateShaderFromResources(ShaderTrait(), QString(), QStringLiteral("vignetting.frag"));
if (!m_vignettingShader->isValid()) {
qCDebug(KWINEFFECTS) << "Vignetting Shader failed to load";
return;
}
} else if (!m_vignettingShader->isValid()) {
// shader broken
return;
}
ShaderBinder binder(m_vignettingShader);
m_vignettingShader->setUniform(KWin::GLShader::ModelViewProjectionMatrix, projection);
m_vignettingShader->setUniform("u_progress", (float)progress * 0.9f);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_SCISSOR_TEST);
const QRect fullArea = effects->clientArea(FullArea, 0, 0);
for (int screen = 0; screen < effects->numScreens(); screen++) {
const QRect screenGeom = effects->clientArea(ScreenArea, screen, 0);
glScissor(screenGeom.x(), effects->virtualScreenSize().height() - screenGeom.y() - screenGeom.height(),
screenGeom.width(), screenGeom.height()); // GL coords are flipped
const float cenX = screenGeom.x() + screenGeom.width() / 2;
const float cenY = fullArea.height() - screenGeom.y() - screenGeom.height() / 2;
const float r = float((screenGeom.width() > screenGeom.height())
? screenGeom.width() : screenGeom.height()) * 0.8f; // Radius
m_vignettingShader->setUniform("u_center", QVector2D(cenX, cenY));
m_vignettingShader->setUniform("u_radius", r);
QVector<float> vertices;
vertices << screenGeom.x() << screenGeom.y();
vertices << screenGeom.x() << screenGeom.y() + screenGeom.height();
vertices << screenGeom.x() + screenGeom.width() << screenGeom.y();
vertices << screenGeom.x() + screenGeom.width() << screenGeom.y() + screenGeom.height();
GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
vbo->setData(vertices.count()/2, 2, vertices.constData(), NULL);
vbo->render(GL_TRIANGLE_STRIP);
}
glDisable(GL_SCISSOR_TEST);
glDisable(GL_BLEND);
}
void LogoutEffect::renderBlurTexture(const QMatrix4x4 &projection)
{
if (!m_blurShader) {
m_blurShader = ShaderManager::instance()->generateShaderFromResources(ShaderTrait::MapTexture, QString(), QStringLiteral("logout-blur.frag"));
if (!m_blurShader->isValid()) {
qCDebug(KWINEFFECTS) << "Logout blur shader failed to load";
}
}
if (!m_blurShader->isValid()) {
// shader is broken - no need to continue here
return;
}
// Unmodified base image
ShaderBinder binder(m_blurShader);
m_blurShader->setUniform(GLShader::ModelViewProjectionMatrix, projection);
m_blurShader->setUniform("u_alphaProgress", (float)progress * 0.4f);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
blurTexture->bind();
blurTexture->generateMipmaps();
blurTexture->render(infiniteRegion(), effects->virtualScreenGeometry());
blurTexture->unbind();
glDisable(GL_BLEND);
}
void LogoutEffect::slotPropertyNotify(EffectWindow* w, long a)
{
if (w || a != logoutAtom)
return; // Not our atom
QByteArray byteData = effects->readRootProperty(logoutAtom, logoutAtom, 8);
if (byteData.length() < 1) {
// Property was deleted
displayEffect = false;
return;
}
// We are using a compatible KSMServer therefore only terminate the effect when the
// atom is deleted, not when the dialog is closed.
canDoPersistent = true;
effects->addRepaintFull();
}
bool LogoutEffect::isActive() const
{
return progress != 0 || logoutWindow;
}
} // namespace
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