yukijoou/kwin
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
kwin/effects/screenshot/screenshot.cpp
Martin Gräßlin fe4329a252 Only call active effects in the effect chain 
Each effect is able to declare itself as currently being active,
that is transforming windows or painting or screen or doing anything
during the current rendered frame.

This change eliminates the hottest path inside KWin identified by
callgrind.

REVIEW: 102449
2011-08-29 07:06:58 +02:00

266 lines
9.8 KiB
C++
Raw Blame History

/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2010 Martin Gräßlin <kde@martin-graesslin.com>
Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
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 "screenshot.h"
#include <kwinglutils.h>
#include <KDE/KDebug>
#include <KDE/KTemporaryFile>
#include <QtDBus/QDBusConnection>
#include <QtCore/QVarLengthArray>
#include <QtGui/QPainter>
#include <X11/extensions/Xfixes.h>
#include <QX11Info>
namespace KWin
{
KWIN_EFFECT(screenshot, ScreenShotEffect)
KWIN_EFFECT_SUPPORTED(screenshot, ScreenShotEffect::supported())
bool ScreenShotEffect::supported()
{
return effects->compositingType() == KWin::OpenGLCompositing && GLRenderTarget::supported();
}
ScreenShotEffect::ScreenShotEffect()
: m_scheduledScreenshot(0)
{
QDBusConnection::sessionBus().registerObject("/Screenshot", this, QDBusConnection::ExportScriptableContents);
QDBusConnection::sessionBus().registerService("org.kde.kwin.Screenshot");
}
ScreenShotEffect::~ScreenShotEffect()
{
QDBusConnection::sessionBus().unregisterObject("/Screenshot");
QDBusConnection::sessionBus().unregisterService("org.kde.kwin.Screenshot");
}
void ScreenShotEffect::postPaintScreen()
{
effects->postPaintScreen();
if (m_scheduledScreenshot) {
int w = displayWidth();
int h = displayHeight();
if (!GLTexture::NPOTTextureSupported()) {
w = nearestPowerOfTwo(w);
h = nearestPowerOfTwo(h);
}
GLTexture* offscreenTexture = new GLTexture(w, h);
offscreenTexture->setFilter(GL_LINEAR);
offscreenTexture->setWrapMode(GL_CLAMP_TO_EDGE);
GLRenderTarget* target = new GLRenderTarget(offscreenTexture);
if (target->valid()) {
WindowPaintData d(m_scheduledScreenshot);
double left = 0;
double top = 0;
double right = m_scheduledScreenshot->width();
double bottom = m_scheduledScreenshot->height();
if (m_scheduledScreenshot->hasDecoration() && m_type & INCLUDE_DECORATION) {
foreach (const WindowQuad & quad, d.quads) {
// we need this loop to include the decoration padding
left = qMin(left, quad.left());
top = qMin(top, quad.top());
right = qMax(right, quad.right());
bottom = qMax(bottom, quad.bottom());
}
} else if (m_scheduledScreenshot->hasDecoration()) {
WindowQuadList newQuads;
left = m_scheduledScreenshot->width();
top = m_scheduledScreenshot->height();
right = 0;
bottom = 0;
foreach (const WindowQuad & quad, d.quads) {
if (quad.type() == WindowQuadContents) {
newQuads << quad;
left = qMin(left, quad.left());
top = qMin(top, quad.top());
right = qMax(right, quad.right());
bottom = qMax(bottom, quad.bottom());
}
}
d.quads = newQuads;
}
int width = right - left;
int height = bottom - top;
d.xTranslate = -m_scheduledScreenshot->x() - left;
d.yTranslate = -m_scheduledScreenshot->y() - top;
// render window into offscreen texture
int mask = PAINT_WINDOW_TRANSFORMED | PAINT_WINDOW_TRANSLUCENT;
GLRenderTarget::pushRenderTarget(target);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glClearColor(0.0, 0.0, 0.0, 1.0);
effects->drawWindow(m_scheduledScreenshot, mask, QRegion(0, 0, width, height), d);
// copy content from framebuffer into image
QImage img(QSize(width, height), QImage::Format_ARGB32);
glReadPixels(0, offscreenTexture->height() - height, width, height, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid*)img.bits());
GLRenderTarget::popRenderTarget();
ScreenShotEffect::convertFromGLImage(img, width, height);
if (m_type & INCLUDE_CURSOR) {
grabPointerImage(img, m_scheduledScreenshot->x() + left, m_scheduledScreenshot->y() + top);
}
m_lastScreenshot = QPixmap::fromImage(img);
if (m_lastScreenshot.handle() == 0) {
Pixmap xpix = XCreatePixmap(display(), rootWindow(), m_lastScreenshot.width(),
m_lastScreenshot.height(), 32);
m_lastScreenshot = QPixmap::fromX11Pixmap(xpix, QPixmap::ExplicitlyShared);
QPainter p(&m_lastScreenshot);
p.setCompositionMode(QPainter::CompositionMode_Source);
p.drawImage(QPoint(0, 0), img);
}
emit screenshotCreated(m_lastScreenshot.handle());
}
delete offscreenTexture;
delete target;
m_scheduledScreenshot = NULL;
}
}
void ScreenShotEffect::screenshotWindowUnderCursor(int mask)
{
m_type = (ScreenShotType)mask;
const QPoint cursor = effects->cursorPos();
foreach (EffectWindow * w, effects->stackingOrder()) {
if (w->geometry().contains(cursor) && w->isOnCurrentDesktop() && !w->isMinimized()) {
m_scheduledScreenshot = w;
}
}
if (m_scheduledScreenshot) {
m_scheduledScreenshot->addRepaintFull();
}
}
QString ScreenShotEffect::screenshotFullscreen()
{
if (!GLRenderTarget::blitSupported()) {
kDebug(1212) << "Framebuffer Blit not supported";
return QString();
}
return blitScreenshot(QRect(0, 0, displayWidth(), displayHeight()));
}
QString ScreenShotEffect::screenshotScreen(int screen)
{
if (!GLRenderTarget::blitSupported()) {
kDebug(1212) << "Framebuffer Blit not supported";
return QString();
}
return blitScreenshot(effects->clientArea(FullScreenArea, screen, 0));
}
QString ScreenShotEffect::screenshotArea(int x, int y, int width, int height)
{
if (!GLRenderTarget::blitSupported()) {
kDebug(1212) << "Framebuffer Blit not supported";
return QString();
}
return blitScreenshot(QRect(x, y, width, height));
}
QString ScreenShotEffect::blitScreenshot(const QRect &geometry)
{
#ifdef KWIN_HAVE_OPENGLES
Q_UNUSED(geometry)
return QString();
#else
GLTexture tex(geometry.width(), geometry.height());
GLRenderTarget target(&tex);
target.blitFromFramebuffer(geometry);
// copy content from framebuffer into image
tex.bind();
QImage img(geometry.size(), QImage::Format_ARGB32);
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid*)img.bits());
tex.unbind();
ScreenShotEffect::convertFromGLImage(img, geometry.width(), geometry.height());
KTemporaryFile temp;
temp.setSuffix(".png");
temp.setAutoRemove(false);
if (!temp.open()) {
return QString();
}
img.save(&temp);
temp.close();
return temp.fileName();
#endif
}
void ScreenShotEffect::grabPointerImage(QImage& snapshot, int offsetx, int offsety)
// Uses the X11_EXTENSIONS_XFIXES_H extension to grab the pointer image, and overlays it onto the snapshot.
{
XFixesCursorImage *xcursorimg = XFixesGetCursorImage(QX11Info::display());
if (!xcursorimg)
return;
//Annoyingly, xfixes specifies the data to be 32bit, but places it in an unsigned long *
//which can be 64 bit. So we need to iterate over a 64bit structure to put it in a 32bit
//structure.
QVarLengthArray< quint32 > pixels(xcursorimg->width * xcursorimg->height);
for (int i = 0; i < xcursorimg->width * xcursorimg->height; ++i)
pixels[i] = xcursorimg->pixels[i] & 0xffffffff;
QImage qcursorimg((uchar *) pixels.data(), xcursorimg->width, xcursorimg->height,
QImage::Format_ARGB32_Premultiplied);
QPainter painter(&snapshot);
painter.drawImage(QPointF(xcursorimg->x - xcursorimg->xhot - offsetx, xcursorimg->y - xcursorimg ->yhot - offsety), qcursorimg);
XFree(xcursorimg);
}
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;
}
} // namespace
Reference in a new issue View git blame Copy permalink