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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"