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kwin/effects/magnifier/magnifier.cpp
Martin Gräßlin 145f0c096f [kwin/effects] Do not use KActionCollections for the global shortcuts 
Most effects had a "collection" for one action. We don't need the
action collection, all it was used for is setting the object name.

With the removal of KActionCollection the effects do not need to link
XmlGui any more, though the dependency is still pulled in through
plasma.
2013-12-10 11:45:33 +01:00

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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) 2007 Christian Nitschkowski <christian.nitschkowski@kdemail.net>
Copyright (C) 2011 Martin Gräßlin <mgraesslin@kde.org>
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 "magnifier.h"
// KConfigSkeleton
#include "magnifierconfig.h"
#include <QAction>
#include <kwinconfig.h>
#include <kstandardaction.h>
#include <kwinglutils.h>
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
#include <kwinxrenderutils.h>
#include <xcb/render.h>
#endif
#include <KDE/KGlobalAccel>
namespace KWin
{
KWIN_EFFECT(magnifier, MagnifierEffect)
KWIN_EFFECT_SUPPORTED(magnifier, MagnifierEffect::supported())
const int FRAME_WIDTH = 5;
MagnifierEffect::MagnifierEffect()
: zoom(1)
, target_zoom(1)
, polling(false)
, m_texture(0)
, m_fbo(0)
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
, m_pixmap(XCB_PIXMAP_NONE)
#endif
{
QAction* a;
a = KStandardAction::zoomIn(this, SLOT(zoomIn()), this);
KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_Equal);
KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_Equal);
a = KStandardAction::zoomOut(this, SLOT(zoomOut()), this);
KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_Minus);
KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_Minus);
a = KStandardAction::actualSize(this, SLOT(toggle()), this);
KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_0);
KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_0);
connect(effects, SIGNAL(mouseChanged(QPoint,QPoint,Qt::MouseButtons,Qt::MouseButtons,Qt::KeyboardModifiers,Qt::KeyboardModifiers)),
this, SLOT(slotMouseChanged(QPoint,QPoint,Qt::MouseButtons,Qt::MouseButtons,Qt::KeyboardModifiers,Qt::KeyboardModifiers)));
reconfigure(ReconfigureAll);
}
MagnifierEffect::~MagnifierEffect()
{
delete m_fbo;
delete m_texture;
destroyPixmap();
// Save the zoom value.
KConfigGroup conf = EffectsHandler::effectConfig(QStringLiteral("Magnifier"));
conf.writeEntry("InitialZoom", target_zoom);
conf.sync();
}
void MagnifierEffect::destroyPixmap()
{
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
if (effects->compositingType() != XRenderCompositing) {
return;
}
m_picture.reset();
if (m_pixmap != XCB_PIXMAP_NONE) {
xcb_free_pixmap(connection(), m_pixmap);
m_pixmap = XCB_PIXMAP_NONE;
}
#endif
}
bool MagnifierEffect::supported()
{
return effects->compositingType() == XRenderCompositing ||
(effects->isOpenGLCompositing() && GLRenderTarget::blitSupported());
}
void MagnifierEffect::reconfigure(ReconfigureFlags)
{
MagnifierConfig::self()->readConfig();
int width, height;
width = MagnifierConfig::width();
height = MagnifierConfig::height();
magnifier_size = QSize(width, height);
// Load the saved zoom value.
target_zoom = MagnifierConfig::initialZoom();
if (target_zoom != zoom)
toggle();
}
void MagnifierEffect::prePaintScreen(ScreenPrePaintData& data, int time)
{
if (zoom != target_zoom) {
double diff = time / animationTime(500.0);
if (target_zoom > zoom)
zoom = qMin(zoom * qMax(1 + diff, 1.2), target_zoom);
else {
zoom = qMax(zoom * qMin(1 - diff, 0.8), target_zoom);
if (zoom == 1.0) {
// zoom ended - delete FBO and texture
delete m_fbo;
delete m_texture;
m_fbo = NULL;
m_texture = NULL;
destroyPixmap();
}
}
}
effects->prePaintScreen(data, time);
if (zoom != 1.0)
data.paint |= magnifierArea().adjusted(-FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH);
}
void MagnifierEffect::paintScreen(int mask, QRegion region, ScreenPaintData& data)
{
effects->paintScreen(mask, region, data); // paint normal screen
if (zoom != 1.0) {
// get the right area from the current rendered screen
const QRect area = magnifierArea();
const QPoint cursor = cursorPos();
QRect srcArea(cursor.x() - (double)area.width() / (zoom*2),
cursor.y() - (double)area.height() / (zoom*2),
(double)area.width() / zoom, (double)area.height() / zoom);
if (effects->isOpenGLCompositing()) {
m_fbo->blitFromFramebuffer(srcArea);
// paint magnifier
m_texture->bind();
m_texture->render(infiniteRegion(), area);
m_texture->unbind();
QVector<float> verts;
GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
vbo->reset();
vbo->setColor(QColor(0, 0, 0));
// top frame
verts << area.right() + FRAME_WIDTH << area.top() - FRAME_WIDTH;
verts << area.left() - FRAME_WIDTH << area.top() - FRAME_WIDTH;
verts << area.left() - FRAME_WIDTH << area.top() - 1;
verts << area.left() - FRAME_WIDTH << area.top() - 1;
verts << area.right() + FRAME_WIDTH << area.top() - 1;
verts << area.right() + FRAME_WIDTH << area.top() - FRAME_WIDTH;
// left frame
verts << area.left() - 1 << area.top() - FRAME_WIDTH;
verts << area.left() - FRAME_WIDTH << area.top() - FRAME_WIDTH;
verts << area.left() - FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
verts << area.left() - FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
verts << area.left() - 1 << area.bottom() + FRAME_WIDTH;
verts << area.left() - 1 << area.top() - FRAME_WIDTH;
// right frame
verts << area.right() + FRAME_WIDTH << area.top() - FRAME_WIDTH;
verts << area.right() + 1 << area.top() - FRAME_WIDTH;
verts << area.right() + 1 << area.bottom() + FRAME_WIDTH;
verts << area.right() + 1 << area.bottom() + FRAME_WIDTH;
verts << area.right() + FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
verts << area.right() + FRAME_WIDTH << area.top() - FRAME_WIDTH;
// bottom frame
verts << area.right() + FRAME_WIDTH << area.bottom() + 1;
verts << area.left() - FRAME_WIDTH << area.bottom() + 1;
verts << area.left() - FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
verts << area.left() - FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
verts << area.right() + FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
verts << area.right() + FRAME_WIDTH << area.bottom() + 1;
vbo->setData(verts.size() / 2, 2, verts.constData(), NULL);
ShaderBinder binder(ShaderManager::ColorShader);
vbo->render(GL_TRIANGLES);
}
if (effects->compositingType() == XRenderCompositing) {
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
if (m_pixmap == XCB_PIXMAP_NONE || m_pixmapSize != srcArea.size()) {
destroyPixmap();
m_pixmap = xcb_generate_id(connection());
m_pixmapSize = srcArea.size();
xcb_create_pixmap(connection(), 32, m_pixmap, rootWindow(), m_pixmapSize.width(), m_pixmapSize.height());
m_picture.reset(new XRenderPicture(m_pixmap, 32));
}
#define DOUBLE_TO_FIXED(d) ((xcb_render_fixed_t) ((d) * 65536))
static xcb_render_transform_t identity = {
DOUBLE_TO_FIXED(1), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0),
DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1), DOUBLE_TO_FIXED(0),
DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1)
};
static xcb_render_transform_t xform = {
DOUBLE_TO_FIXED(1), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0),
DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1), DOUBLE_TO_FIXED(0),
DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1)
};
xcb_render_composite(connection(), XCB_RENDER_PICT_OP_SRC, effects->xrenderBufferPicture(), 0, *m_picture,
srcArea.x(), srcArea.y(), 0, 0, 0, 0, srcArea.width(), srcArea.height());
xcb_flush(connection());
xform.matrix11 = DOUBLE_TO_FIXED(1.0/zoom);
xform.matrix22 = DOUBLE_TO_FIXED(1.0/zoom);
#undef DOUBLE_TO_FIXED
xcb_render_set_picture_transform(connection(), *m_picture, xform);
xcb_render_set_picture_filter(connection(), *m_picture, 4, const_cast<char*>("good"), 0, NULL);
xcb_render_composite(connection(), XCB_RENDER_PICT_OP_SRC, *m_picture, 0, effects->xrenderBufferPicture(),
0, 0, 0, 0, area.x(), area.y(), area.width(), area.height() );
xcb_render_set_picture_filter(connection(), *m_picture, 4, const_cast<char*>("fast"), 0, NULL);
xcb_render_set_picture_transform(connection(), *m_picture, identity);
const xcb_rectangle_t rects[4] = {
{ int16_t(area.x()+FRAME_WIDTH), int16_t(area.y()), uint16_t(area.width()-FRAME_WIDTH), uint16_t(FRAME_WIDTH)},
{ int16_t(area.right()-FRAME_WIDTH), int16_t(area.y()+FRAME_WIDTH), uint16_t(FRAME_WIDTH), uint16_t(area.height()-FRAME_WIDTH)},
{ int16_t(area.x()), int16_t(area.bottom()-FRAME_WIDTH), uint16_t(area.width()-FRAME_WIDTH), uint16_t(FRAME_WIDTH)},
{ int16_t(area.x()), int16_t(area.y()), uint16_t(FRAME_WIDTH), uint16_t(area.height()-FRAME_WIDTH)}
};
xcb_render_fill_rectangles(connection(), XCB_RENDER_PICT_OP_SRC, effects->xrenderBufferPicture(),
preMultiply(QColor(0,0,0,255)), 4, rects);
#endif
}
}
}
void MagnifierEffect::postPaintScreen()
{
if (zoom != target_zoom) {
QRect framedarea = magnifierArea().adjusted(-FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH);
effects->addRepaint(framedarea);
}
effects->postPaintScreen();
}
QRect MagnifierEffect::magnifierArea(QPoint pos) const
{
return QRect(pos.x() - magnifier_size.width() / 2, pos.y() - magnifier_size.height() / 2,
magnifier_size.width(), magnifier_size.height());
}
void MagnifierEffect::zoomIn()
{
target_zoom *= 1.2;
if (!polling) {
polling = true;
effects->startMousePolling();
}
if (effects->isOpenGLCompositing() && !m_texture) {
effects->makeOpenGLContextCurrent();
m_texture = new GLTexture(magnifier_size.width(), magnifier_size.height());
m_texture->setYInverted(false);
m_fbo = new GLRenderTarget(*m_texture);
}
effects->addRepaint(magnifierArea().adjusted(-FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH));
}
void MagnifierEffect::zoomOut()
{
target_zoom /= 1.2;
if (target_zoom <= 1) {
target_zoom = 1;
if (polling) {
polling = false;
effects->stopMousePolling();
}
if (zoom == target_zoom) {
effects->makeOpenGLContextCurrent();
delete m_fbo;
delete m_texture;
m_fbo = NULL;
m_texture = NULL;
destroyPixmap();
}
}
effects->addRepaint(magnifierArea().adjusted(-FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH));
}
void MagnifierEffect::toggle()
{
if (zoom == 1.0) {
if (target_zoom == 1.0) {
target_zoom = 2;
}
if (!polling) {
polling = true;
effects->startMousePolling();
}
if (effects->isOpenGLCompositing() && !m_texture) {
effects->makeOpenGLContextCurrent();
m_texture = new GLTexture(magnifier_size.width(), magnifier_size.height());
m_texture->setYInverted(false);
m_fbo = new GLRenderTarget(*m_texture);
}
} else {
target_zoom = 1;
if (polling) {
polling = false;
effects->stopMousePolling();
}
}
effects->addRepaint(magnifierArea().adjusted(-FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH));
}
void MagnifierEffect::slotMouseChanged(const QPoint& pos, const QPoint& old,
Qt::MouseButtons, Qt::MouseButtons, Qt::KeyboardModifiers, Qt::KeyboardModifiers)
{
if (pos != old && zoom != 1)
// need full repaint as we might lose some change events on fast mouse movements
// see Bug 187658
effects->addRepaintFull();
}
bool MagnifierEffect::isActive() const
{
return zoom != 1.0 || zoom != target_zoom;
}
} // namespace
#include "magnifier.moc"
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