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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++ #include "qquickcontext2dtexture_p.h"
++ #include "qquickcontext2dtile_p.h"
++ #include "qquickcanvasitem_p.h"
++ #include <private/qquickitem_p.h>
++ #include <QtQuick/private/qsgplaintexture_p.h>
++ #include "qquickcontext2dcommandbuffer_p.h"
++ #include <QtCore/QThread>
++ #include <QtGui/QGuiApplication>
++
++ QT_BEGIN_NAMESPACE
++
++ Q_STATIC_LOGGING_CATEGORY(lcCanvas, "qt.quick.canvas")
++
++ QQuickContext2DTexture::QQuickContext2DTexture()
++ : m_context(nullptr)
++ , m_surface(nullptr)
++ , m_item(nullptr)
++ , m_canvasDevicePixelRatio(1)
++ , m_canvasWindowChanged(false)
++ , m_dirtyTexture(false)
++ , m_smooth(true)
++ , m_antialiasing(false)
++ , m_tiledCanvas(false)
++ , m_painting(false)
++ {
++ }
++
++ QQuickContext2DTexture::~QQuickContext2DTexture()
++ {
++ clearTiles();
++ }
++
++ void QQuickContext2DTexture::markDirtyTexture()
++ {
++ if (m_onCustomThread)
++ m_mutex.lock();
++ m_dirtyTexture = true;
++ emit textureChanged();
++ if (m_onCustomThread)
++ m_mutex.unlock();
++ }
++
++ bool QQuickContext2DTexture::setCanvasSize(const QSize &size)
++ {
++ if (m_canvasSize != size) {
++ m_canvasSize = size;
++ return true;
++ }
++ return false;
++ }
++
++ bool QQuickContext2DTexture::setTileSize(const QSize &size)
++ {
++ if (m_tileSize != size) {
++ m_tileSize = size;
++ return true;
++ }
++ return false;
++ }
++
++ void QQuickContext2DTexture::setSmooth(bool smooth)
++ {
++ m_smooth = smooth;
++ }
++
++ void QQuickContext2DTexture::setAntialiasing(bool antialiasing)
++ {
++ m_antialiasing = antialiasing;
++ }
++
++ void QQuickContext2DTexture::setItem(QQuickCanvasItem* item)
++ {
++ m_item = item;
++ if (m_item) {
++ m_context = (QQuickContext2D*) item->rawContext(); // FIXME
++ m_state = m_context->state;
++ } else {
++ m_context = nullptr;
++ }
++ }
++
++ bool QQuickContext2DTexture::setCanvasWindow(const QRect& r)
++ {
++ bool ok = false;
++ static qreal overriddenDevicePixelRatio =
++ !qEnvironmentVariableIsEmpty("QT_CANVAS_OVERRIDE_DEVICEPIXELRATIO") ?
++ qgetenv("QT_CANVAS_OVERRIDE_DEVICEPIXELRATIO").toFloat(&ok) : 0.0;
++ qreal canvasDevicePixelRatio = overriddenDevicePixelRatio;
++ if (overriddenDevicePixelRatio == 0.0) {
++ canvasDevicePixelRatio = (m_item && m_item->window()) ?
++ m_item->window()->effectiveDevicePixelRatio() : qApp->devicePixelRatio();
++ }
++ if (!qFuzzyCompare(m_canvasDevicePixelRatio, canvasDevicePixelRatio)) {
++ qCDebug(lcCanvas, "%s device pixel ratio %.1lf -> %.1lf",
++ (m_item->objectName().isEmpty() ? "Canvas" : qPrintable(m_item->objectName())),
++ m_canvasDevicePixelRatio, canvasDevicePixelRatio);
++ m_canvasDevicePixelRatio = canvasDevicePixelRatio;
++ m_canvasWindowChanged = true;
++ }
++
++ if (m_canvasWindow != r) {
++ m_canvasWindow = r;
++ m_canvasWindowChanged = true;
++ }
++
++ return m_canvasWindowChanged;
++ }
++
++ bool QQuickContext2DTexture::setDirtyRect(const QRect &r)
++ {
++ bool doDirty = false;
++ if (m_tiledCanvas) {
++ for (QQuickContext2DTile* t : std::as_const(m_tiles)) {
++ bool dirty = t->rect().intersected(r).isValid();
++ t->markDirty(dirty);
++ if (dirty)
++ doDirty = true;
++ }
++ } else {
++ doDirty = m_canvasWindow.intersected(r).isValid();
++ }
++ return doDirty;
++ }
++
++ void QQuickContext2DTexture::canvasChanged(const QSize& canvasSize, const QSize& tileSize, const QRect& canvasWindow, const QRect& dirtyRect, bool smooth, bool antialiasing)
++ {
++ QSize ts = tileSize;
++ if (ts.width() > canvasSize.width())
++ ts.setWidth(canvasSize.width());
++
++ if (ts.height() > canvasSize.height())
++ ts.setHeight(canvasSize.height());
++
++ setCanvasSize(canvasSize);
++ setTileSize(ts);
++ setCanvasWindow(canvasWindow);
++
++ if (canvasSize == canvasWindow.size()) {
++ m_tiledCanvas = false;
++ } else {
++ m_tiledCanvas = true;
++ }
++
++ if (dirtyRect.isValid())
++ setDirtyRect(dirtyRect);
++
++ setSmooth(smooth);
++ setAntialiasing(antialiasing);
++ }
++
++ void QQuickContext2DTexture::paintWithoutTiles(QQuickContext2DCommandBuffer *ccb)
++ {
++ if (!ccb || ccb->isEmpty())
++ return;
++
++ QPaintDevice* device = beginPainting();
++ if (!device) {
++ endPainting();
++ return;
++ }
++
++ QPainter p;
++ p.begin(device);
++ p.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing, m_antialiasing);
++ p.setRenderHint(QPainter::SmoothPixmapTransform, m_smooth);
++
++ p.setCompositionMode(QPainter::CompositionMode_SourceOver);
++
++ ccb->replay(&p, m_state, scaleFactor());
++ endPainting();
++ markDirtyTexture();
++ }
++
++ bool QQuickContext2DTexture::canvasDestroyed()
++ {
++ return m_item == nullptr;
++ }
++
++ void QQuickContext2DTexture::paint(QQuickContext2DCommandBuffer *ccb)
++ {
++ QQuickContext2D::mutex.lock();
++ if (canvasDestroyed()) {
++ delete ccb;
++ QQuickContext2D::mutex.unlock();
++ return;
++ }
++ QQuickContext2D::mutex.unlock();
++ if (!m_tiledCanvas) {
++ paintWithoutTiles(ccb);
++ delete ccb;
++ return;
++ }
++
++ QRect tiledRegion = createTiles(m_canvasWindow.intersected(QRect(QPoint(0, 0), m_canvasSize)));
++ if (!tiledRegion.isEmpty()) {
++ QRect dirtyRect;
++ for (QQuickContext2DTile* tile : std::as_const(m_tiles)) {
++ if (tile->dirty()) {
++ if (dirtyRect.isEmpty())
++ dirtyRect = tile->rect();
++ else
++ dirtyRect |= tile->rect();
++ }
++ }
++
++ if (beginPainting()) {
++ QQuickContext2D::State oldState = m_state;
++ for (QQuickContext2DTile* tile : std::as_const(m_tiles)) {
++ if (tile->dirty()) {
++ ccb->replay(tile->createPainter(m_smooth, m_antialiasing), oldState, scaleFactor());
++ tile->drawFinished();
++ tile->markDirty(false);
++ }
++ compositeTile(tile);
++ }
++ endPainting();
++ m_state = oldState;
++ markDirtyTexture();
++ }
++ }
++ delete ccb;
++ }
++
++ QRect QQuickContext2DTexture::tiledRect(const QRectF& window, const QSize& tileSize)
++ {
++ if (window.isEmpty())
++ return QRect();
++
++ const int tw = tileSize.width();
++ const int th = tileSize.height();
++ const int h1 = window.left() / tw;
++ const int v1 = window.top() / th;
++
++ const int htiles = ((window.right() - h1 * tw) + tw - 1)/tw;
++ const int vtiles = ((window.bottom() - v1 * th) + th - 1)/th;
++
++ return QRect(h1 * tw, v1 * th, htiles * tw, vtiles * th);
++ }
++
++ QRect QQuickContext2DTexture::createTiles(const QRect& window)
++ {
++ QList<QQuickContext2DTile*> oldTiles = m_tiles;
++ m_tiles.clear();
++
++ if (window.isEmpty()) {
++ return QRect();
++ }
++
++ QRect r = tiledRect(window, adjustedTileSize(m_tileSize));
++
++ const int tw = m_tileSize.width();
++ const int th = m_tileSize.height();
++ const int h1 = window.left() / tw;
++ const int v1 = window.top() / th;
++
++
++ const int htiles = r.width() / tw;
++ const int vtiles = r.height() / th;
++
++ for (int yy = 0; yy < vtiles; ++yy) {
++ for (int xx = 0; xx < htiles; ++xx) {
++ int ht = xx + h1;
++ int vt = yy + v1;
++
++ QQuickContext2DTile* tile = nullptr;
++
++ QPoint pos(ht * tw, vt * th);
++ QRect rect(pos, m_tileSize);
++
++ for (int i = 0; i < oldTiles.size(); i++) {
++ if (oldTiles[i]->rect() == rect) {
++ tile = oldTiles.takeAt(i);
++ break;
++ }
++ }
++
++ if (!tile)
++ tile = createTile();
++
++ tile->setRect(rect);
++ m_tiles.append(tile);
++ }
++ }
++
++ qDeleteAll(oldTiles);
++
++ return r;
++ }
++
++ void QQuickContext2DTexture::clearTiles()
++ {
++ qDeleteAll(m_tiles);
++ m_tiles.clear();
++ }
++
++ QSize QQuickContext2DTexture::adjustedTileSize(const QSize &ts)
++ {
++ return ts;
++ }
++
++ bool QQuickContext2DTexture::event(QEvent *e)
++ {
++ if ((int) e->type() == QEvent::User + 1) {
++ PaintEvent *pe = static_cast<PaintEvent *>(e);
++ paint(pe->buffer);
++ return true;
++ } else if ((int) e->type() == QEvent::User + 2) {
++ CanvasChangeEvent *ce = static_cast<CanvasChangeEvent *>(e);
++ canvasChanged(ce->canvasSize, ce->tileSize, ce->canvasWindow, ce->dirtyRect, ce->smooth, ce->antialiasing);
++ return true;
++ }
++ return QObject::event(e);
++ }
++
++ QQuickContext2DImageTexture::QQuickContext2DImageTexture()
++ : QQuickContext2DTexture()
++ {
++ }
++
++ QQuickContext2DImageTexture::~QQuickContext2DImageTexture()
++ {
++ }
++
++ QQuickCanvasItem::RenderTarget QQuickContext2DImageTexture::renderTarget() const
++ {
++ return QQuickCanvasItem::Image;
++ }
++
++ QQuickContext2DTile* QQuickContext2DImageTexture::createTile() const
++ {
++ return new QQuickContext2DImageTile();
++ }
++
++ void QQuickContext2DImageTexture::grabImage(const QRectF& rf)
++ {
++ Q_ASSERT(rf.isValid());
++ QQuickContext2D::mutex.lock();
++ if (m_context) {
++ QImage grabbed = m_displayImage.copy(rf.toRect());
++ m_context->setGrabbedImage(grabbed);
++ }
++ QQuickContext2D::mutex.unlock();
++ }
++
++ QSGTexture *QQuickContext2DImageTexture::textureForNextFrame(QSGTexture *last, QQuickWindow *window)
++ {
++ if (m_onCustomThread)
++ m_mutex.lock();
++
++ delete last;
++
++ QSGTexture *texture = window->createTextureFromImage(m_displayImage, QQuickWindow::TextureCanUseAtlas);
++ m_dirtyTexture = false;
++
++ if (m_onCustomThread)
++ m_mutex.unlock();
++
++ return texture;
++ }
++
++ QPaintDevice* QQuickContext2DImageTexture::beginPainting()
++ {
++ QQuickContext2DTexture::beginPainting();
++
++ if (m_canvasWindow.size().isEmpty())
++ return nullptr;
++
++
++ if (m_canvasWindowChanged) {
++ m_image = QImage(m_canvasWindow.size() * m_canvasDevicePixelRatio, QImage::Format_ARGB32_Premultiplied);
++ m_image.setDevicePixelRatio(m_canvasDevicePixelRatio);
++ m_image.fill(0x00000000);
++ m_canvasWindowChanged = false;
++ qCDebug(lcCanvas, "%s size %.1lf x %.1lf painting with size %d x %d DPR %.1lf",
++ (m_item->objectName().isEmpty() ? "Canvas" : qPrintable(m_item->objectName())),
++ m_item->width(), m_item->height(), m_image.size().width(), m_image.size().height(), m_canvasDevicePixelRatio);
++ }
++
++ return &m_image;
++ }
++
++ void QQuickContext2DImageTexture::endPainting()
++ {
++ QQuickContext2DTexture::endPainting();
++ if (m_onCustomThread)
++ m_mutex.lock();
++ m_displayImage = m_image;
++ if (m_onCustomThread)
++ m_mutex.unlock();
++ }
++
++ void QQuickContext2DImageTexture::compositeTile(QQuickContext2DTile* tile)
++ {
++ Q_ASSERT(!tile->dirty());
++ QQuickContext2DImageTile* t = static_cast<QQuickContext2DImageTile*>(tile);
++ QRect target = t->rect().intersected(m_canvasWindow);
++ if (target.isValid()) {
++ QRect source = target;
++ source.moveTo(source.topLeft() - t->rect().topLeft());
++ target.moveTo(target.topLeft() - m_canvasWindow.topLeft());
++
++ m_painter.begin(&m_image);
++ m_painter.setCompositionMode(QPainter::CompositionMode_Source);
++ m_painter.drawImage(target, t->image(), source);
++ m_painter.end();
++ }
++ }
++
++ QT_END_NAMESPACE
++
++ #include "moc_qquickcontext2dtexture_p.cpp"