qt-everywhere-src-5.14.1/qtbase/src/gui/painting/qemulationpaintengine.cpp - orbit - Git at Google

 /****************************************************************************
 **
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the QtGui module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
 ** General Public License version 3 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPL3 included in the
 ** packaging of this file. Please review the following information to
 ** ensure the GNU Lesser General Public License version 3 requirements
 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License version 2.0 or (at your option) the GNU General
 ** Public license version 3 or any later version approved by the KDE Free
 ** Qt Foundation. The licenses are as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
 ** included in the packaging of this file. Please review the following
 ** information to ensure the GNU General Public License requirements will
 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
 ** https://www.gnu.org/licenses/gpl-3.0.html.
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include <private/qemulationpaintengine_p.h>
 #include <private/qpainter_p.h>
 #include <private/qtextengine_p.h>
 #include <qdebug.h>

 QT_BEGIN_NAMESPACE

 QEmulationPaintEngine::QEmulationPaintEngine(QPaintEngineEx *engine)
     : real_engine(engine)
 {
     QPaintEngine::state = real_engine->state();
 }


 QPaintEngine::Type QEmulationPaintEngine::type() const
 {
     return real_engine->type();
 }

 bool QEmulationPaintEngine::begin(QPaintDevice *)
 {
     return true;
 }

 bool QEmulationPaintEngine::end()
 {
     return true;
 }


 QPainterState *QEmulationPaintEngine::createState(QPainterState *orig) const
 {
     return real_engine->createState(orig);
 }

 static inline void combineXForm(QBrush *brush, const QRectF &r)
 {
     QTransform t(r.width(), 0, 0, r.height(), r.x(), r.y());
     if (brush->gradient() && brush->gradient()->coordinateMode() != QGradient::ObjectMode)
         brush->setTransform(t * brush->transform()); // compat mode
     else
         brush->setTransform(brush->transform() * t);
 }

 void QEmulationPaintEngine::fill(const QVectorPath &path, const QBrush &brush)
 {
     QPainterState *s = state();

     if (s->bgMode == Qt::OpaqueMode) {
         Qt::BrushStyle style = brush.style();
         if ((style >= Qt::Dense1Pattern && style <= Qt::DiagCrossPattern) || (style == Qt::TexturePattern ))
             real_engine->fill(path, s->bgBrush);
     }

     Qt::BrushStyle style = qbrush_style(brush);
     if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern) {
         QGradient::CoordinateMode coMode = brush.gradient()->coordinateMode();
         if (coMode > QGradient::LogicalMode) {
             QBrush copy = brush;
             const QPaintDevice *d = real_engine->painter()->device();
             QRectF r = (coMode == QGradient::StretchToDeviceMode) ? QRectF(0, 0, d->width(), d->height()) : path.controlPointRect();
             combineXForm(&copy, r);
             real_engine->fill(path, copy);
             return;
         }
     } else if (style == Qt::TexturePattern) {
         qreal dpr = qHasPixmapTexture(brush) ? brush.texture().devicePixelRatioF() : brush.textureImage().devicePixelRatioF();
         if (!qFuzzyCompare(dpr, 1.0)) {
             QBrush copy = brush;
             combineXForm(&copy, QRectF(0, 0, 1.0/dpr, 1.0/dpr));
             real_engine->fill(path, copy);
             return;
         }
     }

     real_engine->fill(path, brush);
 }

 void QEmulationPaintEngine::stroke(const QVectorPath &path, const QPen &pen)
 {
     QPainterState *s = state();

     if (s->bgMode == Qt::OpaqueMode && pen.style() > Qt::SolidLine) {
         QPen bgPen = pen;
         bgPen.setBrush(s->bgBrush);
         bgPen.setStyle(Qt::SolidLine);
         real_engine->stroke(path, bgPen);
     }

     QBrush brush = pen.brush();
     QPen copy = pen;
     Qt::BrushStyle style = qbrush_style(brush);
     if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern ) {
         QGradient::CoordinateMode coMode = brush.gradient()->coordinateMode();
         if (coMode > QGradient::LogicalMode) {
             const QPaintDevice *d = real_engine->painter()->device();
             QRectF r = (coMode == QGradient::StretchToDeviceMode) ? QRectF(0, 0, d->width(), d->height()) : path.controlPointRect();
             combineXForm(&brush, r);
             copy.setBrush(brush);
             real_engine->stroke(path, copy);
             return;
         }
     }

     real_engine->stroke(path, pen);
 }

 void QEmulationPaintEngine::clip(const QVectorPath &path, Qt::ClipOperation op)
 {
     real_engine->clip(path, op);
 }

 void QEmulationPaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
 {
     if (state()->bgMode == Qt::OpaqueMode && pm.isQBitmap())
         fillBGRect(r);
     real_engine->drawPixmap(r, pm, sr);
 }

 void QEmulationPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textItem)
 {
     if (state()->bgMode == Qt::OpaqueMode) {
         const QTextItemInt &ti = static_cast<const QTextItemInt &>(textItem);
         QRectF rect(p.x(), p.y() - ti.ascent.toReal(), ti.width.toReal(), (ti.ascent + ti.descent).toReal());
         fillBGRect(rect);
     }

     QPainterState *s = state();
     Qt::BrushStyle style = qbrush_style(s->pen.brush());
     if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern)
     {
         QPen savedPen = s->pen;
         QGradient g = *s->pen.brush().gradient();

         if (g.coordinateMode() > QGradient::LogicalMode) {
             QBrush copy = s->pen.brush();
             const QPaintDevice *d = real_engine->painter()->device();
             const QTextItemInt &ti = static_cast<const QTextItemInt &>(textItem);
             QRectF r = (g.coordinateMode() == QGradient::StretchToDeviceMode) ?
                         QRectF(0, 0, d->width(), d->height()) :
                         QRectF(p.x(), p.y() - ti.ascent.toReal(), ti.width.toReal(), (ti.ascent + ti.descent + 1).toReal());
             combineXForm(&copy, r);
             g.setCoordinateMode(QGradient::LogicalMode);
             QBrush brush(g);
             brush.setTransform(copy.transform());
             s->pen.setBrush(brush);
             penChanged();
             real_engine->drawTextItem(p, textItem);
             s->pen = savedPen;
             penChanged();
             return;
         }
     }

     real_engine->drawTextItem(p, textItem);
 }

 void QEmulationPaintEngine::drawStaticTextItem(QStaticTextItem *item)
 {
     real_engine->drawStaticTextItem(item);
 }

 void QEmulationPaintEngine::drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s)
 {
     if (state()->bgMode == Qt::OpaqueMode && pixmap.isQBitmap())
         fillBGRect(r);
     real_engine->drawTiledPixmap(r, pixmap, s);
 }

 void QEmulationPaintEngine::drawImage(const QRectF &r, const QImage &pm, const QRectF &sr, Qt::ImageConversionFlags flags)
 {
     real_engine->drawImage(r, pm, sr, flags);
 }

 void QEmulationPaintEngine::clipEnabledChanged()
 {
     real_engine->clipEnabledChanged();
 }

 void QEmulationPaintEngine::penChanged()
 {
     real_engine->penChanged();
 }

 void QEmulationPaintEngine::brushChanged()
 {
     real_engine->brushChanged();
 }

 void QEmulationPaintEngine::brushOriginChanged()
 {
     real_engine->brushOriginChanged();
 }

 void QEmulationPaintEngine::opacityChanged()
 {
     real_engine->opacityChanged();
 }

 void QEmulationPaintEngine::compositionModeChanged()
 {
     real_engine->compositionModeChanged();
 }

 void QEmulationPaintEngine::renderHintsChanged()
 {
     real_engine->renderHintsChanged();
 }

 void QEmulationPaintEngine::transformChanged()
 {
     real_engine->transformChanged();
 }

 void QEmulationPaintEngine::setState(QPainterState *s)
 {
     QPaintEngine::state = s;
     real_engine->setState(s);
 }

 void QEmulationPaintEngine::beginNativePainting()
 {
     real_engine->beginNativePainting();
 }

 void QEmulationPaintEngine::endNativePainting()
 {
     real_engine->endNativePainting();
 }

 void QEmulationPaintEngine::fillBGRect(const QRectF &r)
 {
     qreal pts[] = { r.x(), r.y(), r.x() + r.width(), r.y(),
                     r.x() + r.width(), r.y() + r.height(), r.x(), r.y() + r.height() };
     QVectorPath vp(pts, 4, 0, QVectorPath::RectangleHint);
     real_engine->fill(vp, state()->bgBrush);
 }

 QT_END_NAMESPACE
	/****************************************************************************
	**
	** Copyright (C) 2016 The Qt Company Ltd.
	** Contact: https://www.qt.io/licensing/
	**
	** This file is part of the QtGui module of the Qt Toolkit.
	**
	** $QT_BEGIN_LICENSE:LGPL$
	** Commercial License Usage
	** Licensees holding valid commercial Qt licenses may use this file in
	** accordance with the commercial license agreement provided with the
	** Software or, alternatively, in accordance with the terms contained in
	** a written agreement between you and The Qt Company. For licensing terms
	** and conditions see https://www.qt.io/terms-conditions. For further
	** information use the contact form at https://www.qt.io/contact-us.
	**
	** GNU Lesser General Public License Usage
	** Alternatively, this file may be used under the terms of the GNU Lesser
	** General Public License version 3 as published by the Free Software
	** Foundation and appearing in the file LICENSE.LGPL3 included in the
	** packaging of this file. Please review the following information to
	** ensure the GNU Lesser General Public License version 3 requirements
	** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
	**
	** GNU General Public License Usage
	** Alternatively, this file may be used under the terms of the GNU
	** General Public License version 2.0 or (at your option) the GNU General
	** Public license version 3 or any later version approved by the KDE Free
	** Qt Foundation. The licenses are as published by the Free Software
	** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
	** included in the packaging of this file. Please review the following
	** information to ensure the GNU General Public License requirements will
	** be met: https://www.gnu.org/licenses/gpl-2.0.html and
	** https://www.gnu.org/licenses/gpl-3.0.html.
	**
	** $QT_END_LICENSE$
	**
	****************************************************************************/

	#include <private/qemulationpaintengine_p.h>
	#include <private/qpainter_p.h>
	#include <private/qtextengine_p.h>
	#include <qdebug.h>

	QT_BEGIN_NAMESPACE

	QEmulationPaintEngine::QEmulationPaintEngine(QPaintEngineEx *engine)
	: real_engine(engine)
	{
	QPaintEngine::state = real_engine->state();
	}


	QPaintEngine::Type QEmulationPaintEngine::type() const
	{
	return real_engine->type();
	}

	bool QEmulationPaintEngine::begin(QPaintDevice *)
	{
	return true;
	}

	bool QEmulationPaintEngine::end()
	{
	return true;
	}


	QPainterState QEmulationPaintEngine::createState(QPainterState orig) const
	{
	return real_engine->createState(orig);
	}

	static inline void combineXForm(QBrush *brush, const QRectF &r)
	{
	QTransform t(r.width(), 0, 0, r.height(), r.x(), r.y());
	if (brush->gradient() && brush->gradient()->coordinateMode() != QGradient::ObjectMode)
	brush->setTransform(t * brush->transform()); // compat mode
	else
	brush->setTransform(brush->transform() * t);
	}

	void QEmulationPaintEngine::fill(const QVectorPath &path, const QBrush &brush)
	{
	QPainterState *s = state();

	if (s->bgMode == Qt::OpaqueMode) {
	Qt::BrushStyle style = brush.style();
	if ((style >= Qt::Dense1Pattern && style <= Qt::DiagCrossPattern) \|\| (style == Qt::TexturePattern ))
	real_engine->fill(path, s->bgBrush);
	}

	Qt::BrushStyle style = qbrush_style(brush);
	if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern) {
	QGradient::CoordinateMode coMode = brush.gradient()->coordinateMode();
	if (coMode > QGradient::LogicalMode) {
	QBrush copy = brush;
	const QPaintDevice *d = real_engine->painter()->device();
	QRectF r = (coMode == QGradient::StretchToDeviceMode) ? QRectF(0, 0, d->width(), d->height()) : path.controlPointRect();
	combineXForm(&copy, r);
	real_engine->fill(path, copy);
	return;
	}
	} else if (style == Qt::TexturePattern) {
	qreal dpr = qHasPixmapTexture(brush) ? brush.texture().devicePixelRatioF() : brush.textureImage().devicePixelRatioF();
	if (!qFuzzyCompare(dpr, 1.0)) {
	QBrush copy = brush;
	combineXForm(&copy, QRectF(0, 0, 1.0/dpr, 1.0/dpr));
	real_engine->fill(path, copy);
	return;
	}
	}

	real_engine->fill(path, brush);
	}

	void QEmulationPaintEngine::stroke(const QVectorPath &path, const QPen &pen)
	{
	QPainterState *s = state();

	if (s->bgMode == Qt::OpaqueMode && pen.style() > Qt::SolidLine) {
	QPen bgPen = pen;
	bgPen.setBrush(s->bgBrush);
	bgPen.setStyle(Qt::SolidLine);
	real_engine->stroke(path, bgPen);
	}

	QBrush brush = pen.brush();
	QPen copy = pen;
	Qt::BrushStyle style = qbrush_style(brush);
	if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern ) {
	QGradient::CoordinateMode coMode = brush.gradient()->coordinateMode();
	if (coMode > QGradient::LogicalMode) {
	const QPaintDevice *d = real_engine->painter()->device();
	QRectF r = (coMode == QGradient::StretchToDeviceMode) ? QRectF(0, 0, d->width(), d->height()) : path.controlPointRect();
	combineXForm(&brush, r);
	copy.setBrush(brush);
	real_engine->stroke(path, copy);
	return;
	}
	}

	real_engine->stroke(path, pen);
	}

	void QEmulationPaintEngine::clip(const QVectorPath &path, Qt::ClipOperation op)
	{
	real_engine->clip(path, op);
	}

	void QEmulationPaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
	{
	if (state()->bgMode == Qt::OpaqueMode && pm.isQBitmap())
	fillBGRect(r);
	real_engine->drawPixmap(r, pm, sr);
	}

	void QEmulationPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textItem)
	{
	if (state()->bgMode == Qt::OpaqueMode) {
	const QTextItemInt &ti = static_cast<const QTextItemInt &>(textItem);
	QRectF rect(p.x(), p.y() - ti.ascent.toReal(), ti.width.toReal(), (ti.ascent + ti.descent).toReal());
	fillBGRect(rect);
	}

	QPainterState *s = state();
	Qt::BrushStyle style = qbrush_style(s->pen.brush());
	if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern)
	{
	QPen savedPen = s->pen;
	QGradient g = *s->pen.brush().gradient();

	if (g.coordinateMode() > QGradient::LogicalMode) {
	QBrush copy = s->pen.brush();
	const QPaintDevice *d = real_engine->painter()->device();
	const QTextItemInt &ti = static_cast<const QTextItemInt &>(textItem);
	QRectF r = (g.coordinateMode() == QGradient::StretchToDeviceMode) ?
	QRectF(0, 0, d->width(), d->height()) :
	QRectF(p.x(), p.y() - ti.ascent.toReal(), ti.width.toReal(), (ti.ascent + ti.descent + 1).toReal());
	combineXForm(&copy, r);
	g.setCoordinateMode(QGradient::LogicalMode);
	QBrush brush(g);
	brush.setTransform(copy.transform());
	s->pen.setBrush(brush);
	penChanged();
	real_engine->drawTextItem(p, textItem);
	s->pen = savedPen;
	penChanged();
	return;
	}
	}

	real_engine->drawTextItem(p, textItem);
	}

	void QEmulationPaintEngine::drawStaticTextItem(QStaticTextItem *item)
	{
	real_engine->drawStaticTextItem(item);
	}

	void QEmulationPaintEngine::drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s)
	{
	if (state()->bgMode == Qt::OpaqueMode && pixmap.isQBitmap())
	fillBGRect(r);
	real_engine->drawTiledPixmap(r, pixmap, s);
	}

	void QEmulationPaintEngine::drawImage(const QRectF &r, const QImage &pm, const QRectF &sr, Qt::ImageConversionFlags flags)
	{
	real_engine->drawImage(r, pm, sr, flags);
	}

	void QEmulationPaintEngine::clipEnabledChanged()
	{
	real_engine->clipEnabledChanged();
	}

	void QEmulationPaintEngine::penChanged()
	{
	real_engine->penChanged();
	}

	void QEmulationPaintEngine::brushChanged()
	{
	real_engine->brushChanged();
	}

	void QEmulationPaintEngine::brushOriginChanged()
	{
	real_engine->brushOriginChanged();
	}

	void QEmulationPaintEngine::opacityChanged()
	{
	real_engine->opacityChanged();
	}

	void QEmulationPaintEngine::compositionModeChanged()
	{
	real_engine->compositionModeChanged();
	}

	void QEmulationPaintEngine::renderHintsChanged()
	{
	real_engine->renderHintsChanged();
	}

	void QEmulationPaintEngine::transformChanged()
	{
	real_engine->transformChanged();
	}

	void QEmulationPaintEngine::setState(QPainterState *s)
	{
	QPaintEngine::state = s;
	real_engine->setState(s);
	}

	void QEmulationPaintEngine::beginNativePainting()
	{
	real_engine->beginNativePainting();
	}

	void QEmulationPaintEngine::endNativePainting()
	{
	real_engine->endNativePainting();
	}

	void QEmulationPaintEngine::fillBGRect(const QRectF &r)
	{
	qreal pts[] = { r.x(), r.y(), r.x() + r.width(), r.y(),
	r.x() + r.width(), r.y() + r.height(), r.x(), r.y() + r.height() };
	QVectorPath vp(pts, 4, 0, QVectorPath::RectangleHint);
	real_engine->fill(vp, state()->bgBrush);
	}

	QT_END_NAMESPACE