310 lines
12 KiB
C++
310 lines
12 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) 2007 Lubos Lunak <l.lunak@kde.org>
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Copyright (C) 2007 Christian Nitschkowski <christian.nitschkowski@kdemail.net>
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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 "magnifier.h"
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#include <kwinconfig.h>
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#include <kaction.h>
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#include <kactioncollection.h>
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#include <kconfiggroup.h>
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#include <kstandardaction.h>
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#include <kwinglutils.h>
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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#include <kwinxrenderutils.h>
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#endif
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namespace KWin
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{
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KWIN_EFFECT(magnifier, MagnifierEffect)
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KWIN_EFFECT_SUPPORTED(magnifier, MagnifierEffect::supported())
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const int FRAME_WIDTH = 5;
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MagnifierEffect::MagnifierEffect()
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: zoom(1)
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, target_zoom(1)
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, polling(false)
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, m_texture(0)
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, m_fbo(0)
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, m_pixmap(0)
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{
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KActionCollection* actionCollection = new KActionCollection(this);
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KAction* a;
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a = static_cast< KAction* >(actionCollection->addAction(KStandardAction::ZoomIn, this, SLOT(zoomIn())));
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_Equal));
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a = static_cast< KAction* >(actionCollection->addAction(KStandardAction::ZoomOut, this, SLOT(zoomOut())));
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_Minus));
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a = static_cast< KAction* >(actionCollection->addAction(KStandardAction::ActualSize, this, SLOT(toggle())));
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_0));
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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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MagnifierEffect::~MagnifierEffect()
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{
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delete m_fbo;
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delete m_texture;
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delete m_pixmap;
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// Save the zoom value.
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KConfigGroup conf = EffectsHandler::effectConfig("Magnifier");
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conf.writeEntry("InitialZoom", target_zoom);
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conf.sync();
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}
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bool MagnifierEffect::supported()
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{
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return effects->compositingType() == XRenderCompositing ||
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(effects->compositingType() == OpenGLCompositing && GLRenderTarget::blitSupported());
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}
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void MagnifierEffect::reconfigure(ReconfigureFlags)
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{
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KConfigGroup conf = EffectsHandler::effectConfig("Magnifier");
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int width, height;
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width = conf.readEntry("Width", 200);
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height = conf.readEntry("Height", 200);
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magnifier_size = QSize(width, height);
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// Load the saved zoom value.
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target_zoom = conf.readEntry("InitialZoom", target_zoom);
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if (target_zoom != zoom)
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toggle();
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}
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void MagnifierEffect::prePaintScreen(ScreenPrePaintData& data, int time)
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{
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if (zoom != target_zoom) {
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double diff = time / animationTime(500.0);
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if (target_zoom > zoom)
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zoom = qMin(zoom * qMax(1 + diff, 1.2), target_zoom);
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else {
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zoom = qMax(zoom * qMin(1 - diff, 0.8), target_zoom);
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if (zoom == 1.0) {
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// zoom ended - delete FBO and texture
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delete m_fbo;
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delete m_texture;
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delete m_pixmap;
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m_fbo = NULL;
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m_texture = NULL;
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m_pixmap = NULL;
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}
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}
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}
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effects->prePaintScreen(data, time);
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if (zoom != 1.0)
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data.paint |= magnifierArea().adjusted(-FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH);
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}
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void MagnifierEffect::paintScreen(int mask, QRegion region, ScreenPaintData& data)
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{
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effects->paintScreen(mask, region, data); // paint normal screen
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if (zoom != 1.0) {
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// get the right area from the current rendered screen
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const QRect area = magnifierArea();
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const QPoint cursor = cursorPos();
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QRect srcArea(cursor.x() - (double)area.width() / (zoom*2),
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cursor.y() - (double)area.height() / (zoom*2),
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(double)area.width() / zoom, (double)area.height() / zoom);
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if (effects->compositingType() == OpenGLCompositing) {
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m_fbo->blitFromFramebuffer(srcArea);
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// paint magnifier
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m_texture->bind();
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m_texture->render(infiniteRegion(), area);
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m_texture->unbind();
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QVector<float> verts;
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GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
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vbo->reset();
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vbo->setColor(QColor(0, 0, 0));
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// top frame
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verts << area.right() + FRAME_WIDTH << area.top() - FRAME_WIDTH;
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verts << area.left() - FRAME_WIDTH << area.top() - FRAME_WIDTH;
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verts << area.left() - FRAME_WIDTH << area.top() - 1;
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verts << area.left() - FRAME_WIDTH << area.top() - 1;
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verts << area.right() + FRAME_WIDTH << area.top() - 1;
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verts << area.right() + FRAME_WIDTH << area.top() - FRAME_WIDTH;
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// left frame
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verts << area.left() - 1 << area.top() - FRAME_WIDTH;
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verts << area.left() - FRAME_WIDTH << area.top() - FRAME_WIDTH;
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verts << area.left() - FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
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verts << area.left() - FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
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verts << area.left() - 1 << area.bottom() + FRAME_WIDTH;
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verts << area.left() - 1 << area.top() - FRAME_WIDTH;
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// right frame
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verts << area.right() + FRAME_WIDTH << area.top() - FRAME_WIDTH;
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verts << area.right() + 1 << area.top() - FRAME_WIDTH;
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verts << area.right() + 1 << area.bottom() + FRAME_WIDTH;
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verts << area.right() + 1 << area.bottom() + FRAME_WIDTH;
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verts << area.right() + FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
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verts << area.right() + FRAME_WIDTH << area.top() - FRAME_WIDTH;
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// bottom frame
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verts << area.right() + FRAME_WIDTH << area.bottom() + 1;
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verts << area.left() - FRAME_WIDTH << area.bottom() + 1;
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verts << area.left() - FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
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verts << area.left() - FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
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verts << area.right() + FRAME_WIDTH << area.bottom() + FRAME_WIDTH;
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verts << area.right() + FRAME_WIDTH << area.bottom() + 1;
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vbo->setData(verts.size() / 2, 2, verts.constData(), NULL);
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if (ShaderManager::instance()->isValid()) {
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ShaderManager::instance()->pushShader(ShaderManager::ColorShader);
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}
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vbo->render(GL_TRIANGLES);
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if (ShaderManager::instance()->isValid()) {
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ShaderManager::instance()->popShader();
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}
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}
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if (effects->compositingType() == XRenderCompositing) {
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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if (!m_pixmap || m_pixmap->size() != srcArea.size()) {
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delete m_pixmap;
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m_pixmap = new QPixmap(srcArea.size());
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}
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static XTransform identity = {{
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{ XDoubleToFixed(1), XDoubleToFixed(0), XDoubleToFixed(0) },
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{ XDoubleToFixed(0), XDoubleToFixed(1), XDoubleToFixed(0) },
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{ XDoubleToFixed(0), XDoubleToFixed(0), XDoubleToFixed(1) }
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}
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};
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static XTransform xform = {{
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{ XDoubleToFixed(1), XDoubleToFixed(0), XDoubleToFixed(0) },
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{ XDoubleToFixed(0), XDoubleToFixed(1), XDoubleToFixed(0) },
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{ XDoubleToFixed(0), XDoubleToFixed(0), XDoubleToFixed(1) }
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}
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};
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XRenderComposite( display(), PictOpSrc, effects->xrenderBufferPicture(), 0, m_pixmap->x11PictureHandle(),
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srcArea.x(), srcArea.y(), 0, 0, 0, 0, srcArea.width(), srcArea.height() );
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XFlush(display());
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xform.matrix[0][0] = XDoubleToFixed(1.0/zoom);
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xform.matrix[1][1] = XDoubleToFixed(1.0/zoom);
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XRenderSetPictureTransform(display(), m_pixmap->x11PictureHandle(), &xform);
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XRenderSetPictureFilter(display(), m_pixmap->x11PictureHandle(), const_cast<char*>("good"), NULL, 0);
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XRenderComposite( display(), PictOpSrc, m_pixmap->x11PictureHandle(), 0, effects->xrenderBufferPicture(),
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0, 0, 0, 0, area.x(), area.y(), area.width(), area.height() );
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XRenderSetPictureFilter(display(), m_pixmap->x11PictureHandle(), const_cast<char*>("fast"), NULL, 0);
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XRenderSetPictureTransform(display(), m_pixmap->x11PictureHandle(), &identity);
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const XRectangle rects[4] = { { area.x()+FRAME_WIDTH, area.y(), area.width()-FRAME_WIDTH, FRAME_WIDTH},
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{ area.right()-FRAME_WIDTH, area.y()+FRAME_WIDTH, FRAME_WIDTH, area.height()-FRAME_WIDTH},
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{ area.x(), area.bottom()-FRAME_WIDTH, area.width()-FRAME_WIDTH, FRAME_WIDTH},
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{ area.x(), area.y(), FRAME_WIDTH, area.height()-FRAME_WIDTH} };
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XRenderColor c = preMultiply(QColor(0,0,0,255));
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XRenderFillRectangles(display(), PictOpSrc, effects->xrenderBufferPicture(), &c, rects, 4);
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#endif
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}
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}
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}
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void MagnifierEffect::postPaintScreen()
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{
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if (zoom != target_zoom) {
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QRect framedarea = magnifierArea().adjusted(-FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH);
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effects->addRepaint(framedarea);
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}
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effects->postPaintScreen();
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}
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QRect MagnifierEffect::magnifierArea(QPoint pos) const
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{
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return QRect(pos.x() - magnifier_size.width() / 2, pos.y() - magnifier_size.height() / 2,
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magnifier_size.width(), magnifier_size.height());
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}
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void MagnifierEffect::zoomIn()
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{
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target_zoom *= 1.2;
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if (!polling) {
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polling = true;
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effects->startMousePolling();
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}
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if (!m_texture) {
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m_texture = new GLTexture(magnifier_size);
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m_texture->setYInverted(false);
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m_fbo = new GLRenderTarget(*m_texture);
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}
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effects->addRepaint(magnifierArea().adjusted(-FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH));
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}
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void MagnifierEffect::zoomOut()
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{
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target_zoom /= 1.2;
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if (target_zoom < 1) {
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target_zoom = 1;
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if (polling) {
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polling = false;
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effects->stopMousePolling();
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}
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if (zoom == target_zoom) {
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delete m_fbo;
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delete m_texture;
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delete m_pixmap;
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m_fbo = NULL;
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m_texture = NULL;
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m_pixmap = NULL;
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}
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}
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effects->addRepaint(magnifierArea().adjusted(-FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH));
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}
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void MagnifierEffect::toggle()
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{
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if (zoom == 1.0) {
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if (target_zoom == 1.0) {
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target_zoom = 2;
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}
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if (!polling) {
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polling = true;
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effects->startMousePolling();
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}
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if (!m_texture) {
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m_texture = new GLTexture(magnifier_size);
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m_texture->setYInverted(false);
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m_fbo = new GLRenderTarget(*m_texture);
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}
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} else {
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target_zoom = 1;
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if (polling) {
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polling = false;
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effects->stopMousePolling();
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}
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}
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effects->addRepaint(magnifierArea().adjusted(-FRAME_WIDTH, -FRAME_WIDTH, FRAME_WIDTH, FRAME_WIDTH));
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}
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void MagnifierEffect::slotMouseChanged(const QPoint& pos, const QPoint& old,
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Qt::MouseButtons, Qt::MouseButtons, Qt::KeyboardModifiers, Qt::KeyboardModifiers)
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{
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if (pos != old && zoom != 1)
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// need full repaint as we might lose some change events on fast mouse movements
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// see Bug 187658
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effects->addRepaintFull();
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}
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bool MagnifierEffect::isActive() const
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{
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return zoom != 1.0 || zoom != target_zoom;
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}
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} // namespace
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#include "magnifier.moc"
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