qquickcontext2dtile.cpp

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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
 
#include "qquickcontext2dtile_p.h"
 
QT_BEGIN_NAMESPACE
 
QQuickContext2DTile::QQuickContext2DTile()
    : m_dirty(true)
    , m_rect(QRect(0, 0, 1, 1))
    , m_device(nullptr)
{
}
 
QQuickContext2DTile::~QQuickContext2DTile()
{
    if (m_painter.isActive())
        m_painter.end();
}
 
QPainter* QQuickContext2DTile::createPainter(bool smooth, bool antialiasing)
{
    if (m_painter.isActive())
        m_painter.end();
 
    aboutToDraw();
    if (m_device) {
        m_painter.begin(m_device);
        m_painter.resetTransform();
        m_painter.setCompositionMode(QPainter::CompositionMode_Source);
 
#ifdef QQUICKCONTEXT2D_DEBUG
        int v = 100;
        int gray = (m_rect.x() / m_rect.width() + m_rect.y() / m_rect.height()) % 2;
        if (gray)
            v = 150;
        m_painter.fillRect(QRect(0, 0, m_rect.width(), m_rect.height()), QColor(v, v, v, 255));
#endif
 
        if (antialiasing)
            m_painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing, true);
        else
            m_painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing, false);
 
        if (smooth)
            m_painter.setRenderHint(QPainter::SmoothPixmapTransform, true);
        else
            m_painter.setRenderHint(QPainter::SmoothPixmapTransform, false);
 
        m_painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
        m_painter.translate(-m_rect.left(), -m_rect.top());
        m_painter.setClipRect(m_rect);
        m_painter.setClipping(false);
        return &m_painter;
    }
 
    return nullptr;
}
 
QQuickContext2DImageTile::QQuickContext2DImageTile()
    : QQuickContext2DTile()
{
}
 
QQuickContext2DImageTile::~QQuickContext2DImageTile()
{
}
 
void QQuickContext2DImageTile::setRect(const QRect& r)
{
    if (m_rect == r)
        return;
    m_rect = r;
    m_dirty = true;
    if (m_image.size() != r.size()) {
        m_image = QImage(r.size(), QImage::Format_ARGB32_Premultiplied);
    }
    m_device = &m_image;
}
 
QT_END_NAMESPACE