332 lines
13 KiB
C++
332 lines
13 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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SPDX-FileCopyrightText: 2007 Lubos Lunak <l.lunak@kde.org>
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SPDX-FileCopyrightText: 2007 Christian Nitschkowski <christian.nitschkowski@kdemail.net>
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SPDX-FileCopyrightText: 2011 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "magnifier.h"
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// KConfigSkeleton
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#include "magnifierconfig.h"
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#include <QAction>
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#include <kwinconfig.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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#include <xcb/render.h>
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#endif
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#include <KGlobalAccel>
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namespace KWin
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{
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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(nullptr)
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, m_fbo(nullptr)
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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, m_pixmap(XCB_PIXMAP_NONE)
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#endif
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{
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initConfig<MagnifierConfig>();
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QAction* a;
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a = KStandardAction::zoomIn(this, &MagnifierEffect::zoomIn, this);
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KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_Equal);
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_Equal);
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effects->registerGlobalShortcut(Qt::META + Qt::Key_Equal, a);
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a = KStandardAction::zoomOut(this, &MagnifierEffect::zoomOut, this);
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KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_Minus);
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_Minus);
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effects->registerGlobalShortcut(Qt::META + Qt::Key_Minus, a);
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a = KStandardAction::actualSize(this, &MagnifierEffect::toggle, this);
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KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_0);
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KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::META + Qt::Key_0);
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effects->registerGlobalShortcut(Qt::META + Qt::Key_0, a);
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connect(effects, &EffectsHandler::mouseChanged, this, &MagnifierEffect::slotMouseChanged);
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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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destroyPixmap();
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// Save the zoom value.
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MagnifierConfig::setInitialZoom(target_zoom);
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MagnifierConfig::self()->save();
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}
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void MagnifierEffect::destroyPixmap()
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{
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#ifdef KWIN_HAVE_XRENDER_COMPOSITING
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if (effects->compositingType() != XRenderCompositing) {
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return;
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}
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m_picture.reset();
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if (m_pixmap != XCB_PIXMAP_NONE) {
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xcb_free_pixmap(xcbConnection(), m_pixmap);
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m_pixmap = XCB_PIXMAP_NONE;
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}
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#endif
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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->isOpenGLCompositing() && GLRenderTarget::blitSupported());
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}
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void MagnifierEffect::reconfigure(ReconfigureFlags)
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{
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MagnifierConfig::self()->read();
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int width, height;
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width = MagnifierConfig::width();
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height = MagnifierConfig::height();
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magnifier_size = QSize(width, height);
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// Load the saved zoom value.
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target_zoom = MagnifierConfig::initialZoom();
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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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m_fbo = nullptr;
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m_texture = nullptr;
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destroyPixmap();
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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, const QRegion ®ion, 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->isOpenGLCompositing()) {
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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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auto s = ShaderManager::instance()->pushShader(ShaderTrait::MapTexture);
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QMatrix4x4 mvp;
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const QSize size = effects->virtualScreenSize();
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mvp.ortho(0, size.width(), size.height(), 0, 0, 65535);
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mvp.translate(area.x(), area.y());
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s->setUniform(GLShader::ModelViewProjectionMatrix, mvp);
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m_texture->render(infiniteRegion(), area);
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ShaderManager::instance()->popShader();
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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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const QRectF areaF = area;
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// top frame
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verts << areaF.right() + FRAME_WIDTH << areaF.top() - FRAME_WIDTH;
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verts << areaF.left() - FRAME_WIDTH << areaF.top() - FRAME_WIDTH;
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verts << areaF.left() - FRAME_WIDTH << areaF.top();
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verts << areaF.left() - FRAME_WIDTH << areaF.top();
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verts << areaF.right() + FRAME_WIDTH << areaF.top();
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verts << areaF.right() + FRAME_WIDTH << areaF.top() - FRAME_WIDTH;
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// left frame
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verts << areaF.left() << areaF.top() - FRAME_WIDTH;
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verts << areaF.left() - FRAME_WIDTH << areaF.top() - FRAME_WIDTH;
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verts << areaF.left() - FRAME_WIDTH << areaF.bottom() + FRAME_WIDTH;
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verts << areaF.left() - FRAME_WIDTH << areaF.bottom() + FRAME_WIDTH;
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verts << areaF.left() << areaF.bottom() + FRAME_WIDTH;
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verts << areaF.left() << areaF.top() - FRAME_WIDTH;
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// right frame
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verts << areaF.right() + FRAME_WIDTH << areaF.top() - FRAME_WIDTH;
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verts << areaF.right() << areaF.top() - FRAME_WIDTH;
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verts << areaF.right() << areaF.bottom() + FRAME_WIDTH;
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verts << areaF.right() << areaF.bottom() + FRAME_WIDTH;
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verts << areaF.right() + FRAME_WIDTH << areaF.bottom() + FRAME_WIDTH;
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verts << areaF.right() + FRAME_WIDTH << areaF.top() - FRAME_WIDTH;
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// bottom frame
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verts << areaF.right() + FRAME_WIDTH << areaF.bottom();
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verts << areaF.left() - FRAME_WIDTH << areaF.bottom();
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verts << areaF.left() - FRAME_WIDTH << areaF.bottom() + FRAME_WIDTH;
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verts << areaF.left() - FRAME_WIDTH << areaF.bottom() + FRAME_WIDTH;
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verts << areaF.right() + FRAME_WIDTH << areaF.bottom() + FRAME_WIDTH;
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verts << areaF.right() + FRAME_WIDTH << areaF.bottom();
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vbo->setData(verts.size() / 2, 2, verts.constData(), nullptr);
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ShaderBinder binder(ShaderTrait::UniformColor);
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binder.shader()->setUniform(GLShader::ModelViewProjectionMatrix, data.projectionMatrix());
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vbo->render(GL_TRIANGLES);
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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 == XCB_PIXMAP_NONE || m_pixmapSize != srcArea.size()) {
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destroyPixmap();
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m_pixmap = xcb_generate_id(xcbConnection());
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m_pixmapSize = srcArea.size();
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xcb_create_pixmap(xcbConnection(), 32, m_pixmap, x11RootWindow(), m_pixmapSize.width(), m_pixmapSize.height());
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m_picture.reset(new XRenderPicture(m_pixmap, 32));
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}
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#define DOUBLE_TO_FIXED(d) ((xcb_render_fixed_t) ((d) * 65536))
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static const xcb_render_transform_t identity = {
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DOUBLE_TO_FIXED(1), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0),
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DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1), DOUBLE_TO_FIXED(0),
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DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1)
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};
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static xcb_render_transform_t xform = {
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DOUBLE_TO_FIXED(1), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0),
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DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1), DOUBLE_TO_FIXED(0),
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DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(0), DOUBLE_TO_FIXED(1)
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};
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xcb_render_composite(xcbConnection(), XCB_RENDER_PICT_OP_SRC, effects->xrenderBufferPicture(), 0, *m_picture,
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srcArea.x(), srcArea.y(), 0, 0, 0, 0, srcArea.width(), srcArea.height());
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xcb_flush(xcbConnection());
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xform.matrix11 = DOUBLE_TO_FIXED(1.0/zoom);
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xform.matrix22 = DOUBLE_TO_FIXED(1.0/zoom);
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#undef DOUBLE_TO_FIXED
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xcb_render_set_picture_transform(xcbConnection(), *m_picture, xform);
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xcb_render_set_picture_filter(xcbConnection(), *m_picture, 4, const_cast<char*>("good"), 0, nullptr);
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xcb_render_composite(xcbConnection(), XCB_RENDER_PICT_OP_SRC, *m_picture, 0, effects->xrenderBufferPicture(),
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0, 0, 0, 0, area.x(), area.y(), area.width(), area.height() );
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xcb_render_set_picture_filter(xcbConnection(), *m_picture, 4, const_cast<char*>("fast"), 0, nullptr);
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xcb_render_set_picture_transform(xcbConnection(), *m_picture, identity);
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const xcb_rectangle_t rects[4] = {
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{ int16_t(area.x()+FRAME_WIDTH), int16_t(area.y()), uint16_t(area.width()-FRAME_WIDTH), uint16_t(FRAME_WIDTH)},
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{ int16_t(area.right()-FRAME_WIDTH), int16_t(area.y()+FRAME_WIDTH), uint16_t(FRAME_WIDTH), uint16_t(area.height()-FRAME_WIDTH)},
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{ int16_t(area.x()), int16_t(area.bottom()-FRAME_WIDTH), uint16_t(area.width()-FRAME_WIDTH), uint16_t(FRAME_WIDTH)},
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{ int16_t(area.x()), int16_t(area.y()), uint16_t(FRAME_WIDTH), uint16_t(area.height()-FRAME_WIDTH)}
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};
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xcb_render_fill_rectangles(xcbConnection(), XCB_RENDER_PICT_OP_SRC, effects->xrenderBufferPicture(),
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preMultiply(QColor(0,0,0,255)), 4, rects);
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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 (effects->isOpenGLCompositing() && !m_texture) {
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effects->makeOpenGLContextCurrent();
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m_texture = new GLTexture(GL_RGBA8, magnifier_size.width(), magnifier_size.height());
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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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effects->makeOpenGLContextCurrent();
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delete m_fbo;
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delete m_texture;
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m_fbo = nullptr;
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m_texture = nullptr;
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destroyPixmap();
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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 (effects->isOpenGLCompositing() && !m_texture) {
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effects->makeOpenGLContextCurrent();
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m_texture = new GLTexture(GL_RGBA8, magnifier_size.width(), magnifier_size.height());
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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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