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Diffstat (limited to 'plugins/qmlprofiler/canvas/qdeclarativecontext2d.cpp')
| -rw-r--r-- | plugins/qmlprofiler/canvas/qdeclarativecontext2d.cpp | 1130 |
1 files changed, 1130 insertions, 0 deletions
diff --git a/plugins/qmlprofiler/canvas/qdeclarativecontext2d.cpp b/plugins/qmlprofiler/canvas/qdeclarativecontext2d.cpp new file mode 100644 index 0000000000..62e7f09207 --- /dev/null +++ b/plugins/qmlprofiler/canvas/qdeclarativecontext2d.cpp @@ -0,0 +1,1130 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of Qt Creator. +** +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +****************************************************************************/ + +#include "qdeclarativecontext2d_p.h" + +#include "qdeclarativecanvas_p.h" + +#include <qdebug.h> +#include <math.h> + +#include <qgraphicsitem.h> +#include <qapplication.h> +#include <qgraphicseffect.h> + +#include <QImage> + +QT_BEGIN_NAMESPACE + +static const double Q_PI = 3.14159265358979323846; // pi + +class CustomDropShadowEffect : public QGraphicsDropShadowEffect +{ +public: + void draw(QPainter *painter) { QGraphicsDropShadowEffect::draw(painter);} + void drawSource(QPainter *painter) { QGraphicsDropShadowEffect::drawSource(painter);} +}; + +// Note, this is exported but in a private header as qtopengl depends on it. +// But it really should be considered private API +void qt_blurImage(QPainter *p, QImage &blurImage, qreal radius, bool quality, bool alphaOnly, int transposed = 0); +void qt_blurImage(QImage &blurImage, qreal radius, bool quality, int transposed = 0); + +#define DEGREES(t) ((t) * 180.0 / Q_PI) + +#define qClamp(val, min, max) qMin(qMax(val, min), max) +static QList<qreal> parseNumbersList(QString::const_iterator &itr) +{ + QList<qreal> points; + QString temp; + while ((*itr).isSpace()) + ++itr; + while ((*itr).isNumber() || + (*itr) == QLatin1Char('-') || (*itr) == QLatin1Char('+') || (*itr) == QLatin1Char('.')) { + temp.clear(); + + if ((*itr) == QLatin1Char('-')) + temp += *itr++; + else if ((*itr) == QLatin1Char('+')) + temp += *itr++; + while ((*itr).isDigit()) + temp += *itr++; + if ((*itr) == QLatin1Char('.')) + temp += *itr++; + while ((*itr).isDigit()) + temp += *itr++; + while ((*itr).isSpace()) + ++itr; + if ((*itr) == QLatin1Char(',')) + ++itr; + points.append(temp.toDouble()); + //eat spaces + while ((*itr).isSpace()) + ++itr; + } + + return points; +} + +QColor colorFromString(const QString &name) +{ + QString::const_iterator itr = name.constBegin(); + QList<qreal> compo; + if (name.startsWith(QLatin1String("rgba("))) { + ++itr; ++itr; ++itr; ++itr; ++itr; + compo = parseNumbersList(itr); + if (compo.size() != 4) + return QColor(); + //alpha seems to be always between 0-1 + compo[3] *= 255; + return QColor((int)compo[0], (int)compo[1], + (int)compo[2], (int)compo[3]); + } else if (name.startsWith(QLatin1String("rgb("))) { + ++itr; ++itr; ++itr; ++itr; + compo = parseNumbersList(itr); + if (compo.size() != 3) + return QColor(); + return QColor((int)qClamp(compo[0], qreal(0), qreal(255)), + (int)qClamp(compo[1], qreal(0), qreal(255)), + (int)qClamp(compo[2], qreal(0), qreal(255))); + } else if (name.startsWith(QLatin1String("hsla("))) { + ++itr; ++itr; ++itr; ++itr; ++itr; + compo = parseNumbersList(itr); + if (compo.size() != 4) + return QColor(); + return QColor::fromHslF(compo[0], compo[1], + compo[2], compo[3]); + } else if (name.startsWith(QLatin1String("hsl("))) { + ++itr; ++itr; ++itr; ++itr; ++itr; + compo = parseNumbersList(itr); + if (compo.size() != 3) + return QColor(); + return QColor::fromHslF(compo[0], compo[1], + compo[2]); + } else { + //QRgb color; + //CSSParser::parseColor(name, color); + return QColor(name); + } +} + + +static QPainter::CompositionMode compositeOperatorFromString(const QString &compositeOperator) +{ + if (compositeOperator == QLatin1String("source-over")) + return QPainter::CompositionMode_SourceOver; + else if (compositeOperator == QLatin1String("source-out")) + return QPainter::CompositionMode_SourceOut; + else if (compositeOperator == QLatin1String("source-in")) + return QPainter::CompositionMode_SourceIn; + else if (compositeOperator == QLatin1String("source-atop")) + return QPainter::CompositionMode_SourceAtop; + else if (compositeOperator == QLatin1String("destination-atop")) + return QPainter::CompositionMode_DestinationAtop; + else if (compositeOperator == QLatin1String("destination-in")) + return QPainter::CompositionMode_DestinationIn; + else if (compositeOperator == QLatin1String("destination-out")) + return QPainter::CompositionMode_DestinationOut; + else if (compositeOperator == QLatin1String("destination-over")) + return QPainter::CompositionMode_DestinationOver; + else if (compositeOperator == QLatin1String("darker")) + return QPainter::CompositionMode_SourceOver; + else if (compositeOperator == QLatin1String("lighter")) + return QPainter::CompositionMode_SourceOver; + else if (compositeOperator == QLatin1String("copy")) + return QPainter::CompositionMode_Source; + else if (compositeOperator == QLatin1String("xor")) + return QPainter::CompositionMode_Xor; + + return QPainter::CompositionMode_SourceOver; +} + +static QString compositeOperatorToString(QPainter::CompositionMode op) +{ + switch (op) { + case QPainter::CompositionMode_SourceOver: + return QLatin1String("source-over"); + case QPainter::CompositionMode_DestinationOver: + return QLatin1String("destination-over"); + case QPainter::CompositionMode_Clear: + return QLatin1String("clear"); + case QPainter::CompositionMode_Source: + return QLatin1String("source"); + case QPainter::CompositionMode_Destination: + return QLatin1String("destination"); + case QPainter::CompositionMode_SourceIn: + return QLatin1String("source-in"); + case QPainter::CompositionMode_DestinationIn: + return QLatin1String("destination-in"); + case QPainter::CompositionMode_SourceOut: + return QLatin1String("source-out"); + case QPainter::CompositionMode_DestinationOut: + return QLatin1String("destination-out"); + case QPainter::CompositionMode_SourceAtop: + return QLatin1String("source-atop"); + case QPainter::CompositionMode_DestinationAtop: + return QLatin1String("destination-atop"); + case QPainter::CompositionMode_Xor: + return QLatin1String("xor"); + case QPainter::CompositionMode_Plus: + return QLatin1String("plus"); + case QPainter::CompositionMode_Multiply: + return QLatin1String("multiply"); + case QPainter::CompositionMode_Screen: + return QLatin1String("screen"); + case QPainter::CompositionMode_Overlay: + return QLatin1String("overlay"); + case QPainter::CompositionMode_Darken: + return QLatin1String("darken"); + case QPainter::CompositionMode_Lighten: + return QLatin1String("lighten"); + case QPainter::CompositionMode_ColorDodge: + return QLatin1String("color-dodge"); + case QPainter::CompositionMode_ColorBurn: + return QLatin1String("color-burn"); + case QPainter::CompositionMode_HardLight: + return QLatin1String("hard-light"); + case QPainter::CompositionMode_SoftLight: + return QLatin1String("soft-light"); + case QPainter::CompositionMode_Difference: + return QLatin1String("difference"); + case QPainter::CompositionMode_Exclusion: + return QLatin1String("exclusion"); + default: + break; + } + return QString(); +} + +void Context2D::save() +{ + m_stateStack.push(m_state); +} + + +void Context2D::restore() +{ + if (!m_stateStack.isEmpty()) { + m_state = m_stateStack.pop(); + m_state.flags = AllIsFullOfDirt; + } +} + + +void Context2D::scale(qreal x, qreal y) +{ + m_state.matrix.scale(x, y); + m_state.flags |= DirtyTransformationMatrix; +} + + +void Context2D::rotate(qreal angle) +{ + m_state.matrix.rotate(DEGREES(angle)); + m_state.flags |= DirtyTransformationMatrix; +} + + +void Context2D::translate(qreal x, qreal y) +{ + m_state.matrix.translate(x, y); + m_state.flags |= DirtyTransformationMatrix; +} + + +void Context2D::transform(qreal m11, qreal m12, qreal m21, qreal m22, + qreal dx, qreal dy) +{ + QMatrix mat(m11, m12, + m21, m22, + dx, dy); + m_state.matrix *= mat; + m_state.flags |= DirtyTransformationMatrix; +} + + +void Context2D::setTransform(qreal m11, qreal m12, qreal m21, qreal m22, + qreal dx, qreal dy) +{ + QMatrix mat(m11, m12, + m21, m22, + dx, dy); + m_state.matrix = mat; + m_state.flags |= DirtyTransformationMatrix; +} + + +QString Context2D::globalCompositeOperation() const +{ + return compositeOperatorToString(m_state.globalCompositeOperation); +} + +void Context2D::setGlobalCompositeOperation(const QString &op) +{ + QPainter::CompositionMode mode = + compositeOperatorFromString(op); + m_state.globalCompositeOperation = mode; + m_state.flags |= DirtyGlobalCompositeOperation; +} + +QVariant Context2D::strokeStyle() const +{ + return m_state.strokeStyle; +} + +void Context2D::setStrokeStyle(const QVariant &style) +{ + CanvasGradient * gradient= qobject_cast<CanvasGradient*>(style.value<QObject*>()); + if (gradient) { + m_state.strokeStyle = gradient->value(); + } else { + QColor color = colorFromString(style.toString()); + m_state.strokeStyle = color; + } + m_state.flags |= DirtyStrokeStyle; +} + +QVariant Context2D::fillStyle() const +{ + return m_state.fillStyle; +} + +void Context2D::setFillStyle(const QVariant &style) +{ + CanvasGradient * gradient= qobject_cast<CanvasGradient*>(style.value<QObject*>()); + if (gradient) { + m_state.fillStyle = gradient->value(); + } else { + QColor color = colorFromString(style.toString()); + m_state.fillStyle = color; + } + m_state.flags |= DirtyFillStyle; +} + +qreal Context2D::globalAlpha() const +{ + return m_state.globalAlpha; +} + +void Context2D::setGlobalAlpha(qreal alpha) +{ + m_state.globalAlpha = alpha; + m_state.flags |= DirtyGlobalAlpha; +} + +CanvasImage *Context2D::createImage(const QString &url) +{ + return new CanvasImage(url); +} + +CanvasGradient *Context2D::createLinearGradient(qreal x0, qreal y0, + qreal x1, qreal y1) +{ + QLinearGradient g(x0, y0, x1, y1); + return new CanvasGradient(g); +} + + +CanvasGradient *Context2D::createRadialGradient(qreal x0, qreal y0, + qreal r0, qreal x1, + qreal y1, qreal r1) +{ + QRadialGradient g(QPointF(x1, y1), r0+r1, QPointF(x0, y0)); + return new CanvasGradient(g); +} + +qreal Context2D::lineWidth() const +{ + return m_state.lineWidth; +} + +void Context2D::setLineWidth(qreal w) +{ + m_state.lineWidth = w; + m_state.flags |= DirtyLineWidth; +} + +QString Context2D::lineCap() const +{ + switch (m_state.lineCap) { + case Qt::FlatCap: + return QLatin1String("butt"); + case Qt::SquareCap: + return QLatin1String("square"); + case Qt::RoundCap: + return QLatin1String("round"); + default: ; + } + return QString(); +} + +void Context2D::setLineCap(const QString &capString) +{ + Qt::PenCapStyle style; + if (capString == QLatin1String("round")) + style = Qt::RoundCap; + else if (capString == QLatin1String("square")) + style = Qt::SquareCap; + else //if (capString == QLatin1String("butt")) + style = Qt::FlatCap; + m_state.lineCap = style; + m_state.flags |= DirtyLineCap; +} + +QString Context2D::lineJoin() const +{ + switch (m_state.lineJoin) { + case Qt::RoundJoin: + return QLatin1String("round"); + case Qt::BevelJoin: + return QLatin1String("bevel"); + case Qt::MiterJoin: + return QLatin1String("miter"); + default: ; + } + return QString(); +} + +void Context2D::setLineJoin(const QString &joinString) +{ + Qt::PenJoinStyle style; + if (joinString == QLatin1String("round")) + style = Qt::RoundJoin; + else if (joinString == QLatin1String("bevel")) + style = Qt::BevelJoin; + else //if (joinString == "miter") + style = Qt::MiterJoin; + m_state.lineJoin = style; + m_state.flags |= DirtyLineJoin; +} + +qreal Context2D::miterLimit() const +{ + return m_state.miterLimit; +} + +void Context2D::setMiterLimit(qreal m) +{ + m_state.miterLimit = m; + m_state.flags |= DirtyMiterLimit; +} + +void Context2D::setShadowOffsetX(qreal x) +{ + if (m_state.shadowOffsetX == x) + return; + m_state.shadowOffsetX = x; + updateShadowBuffer(); + if (m_painter.device() == &m_shadowbuffer && m_state.shadowBlur>0) + endPainting(); + m_state.flags |= DirtyShadowOffsetX; +} + +const QList<Context2D::MouseArea> &Context2D::mouseAreas() const +{ + return m_mouseAreas; +} + +void Context2D::updateShadowBuffer() { + if (m_shadowbuffer.isNull() || m_shadowbuffer.width() != m_width+m_state.shadowOffsetX || + m_shadowbuffer.height() != m_height+m_state.shadowOffsetY) { + m_shadowbuffer = QImage(m_width+m_state.shadowOffsetX, m_height+m_state.shadowOffsetY, QImage::Format_ARGB32); + m_shadowbuffer.fill(Qt::transparent); + } +} + +void Context2D::setShadowOffsetY(qreal y) +{ + if (m_state.shadowOffsetY == y) + return; + m_state.shadowOffsetY = y; + updateShadowBuffer(); + if (m_painter.device() == &m_shadowbuffer && m_state.shadowBlur>0) + endPainting(); + + m_state.flags |= DirtyShadowOffsetY; +} + +void Context2D::setShadowBlur(qreal b) +{ + if (m_state.shadowBlur == b) + return; + m_state.shadowBlur = b; + updateShadowBuffer(); + if (m_painter.device() == &m_shadowbuffer && m_state.shadowBlur>0) + endPainting(); + m_state.flags |= DirtyShadowBlur; +} + +void Context2D::setShadowColor(const QString &str) +{ + m_state.shadowColor = colorFromString(str); + if (m_painter.device() == &m_shadowbuffer && m_state.shadowBlur>0) + endPainting(); + m_state.flags |= DirtyShadowColor; +} + +QString Context2D::textBaseline() +{ + switch (m_state.textBaseline) { + case Context2D::Alphabetic: + return QLatin1String("alphabetic"); + case Context2D::Hanging: + return QLatin1String("hanging"); + case Context2D::Bottom: + return QLatin1String("bottom"); + case Context2D::Top: + return QLatin1String("top"); + case Context2D::Middle: + return QLatin1String("middle"); + default: + Q_ASSERT("invalid value"); + return QLatin1String("start"); + } +} + +void Context2D::setTextBaseline(const QString &baseline) +{ + if (baseline==QLatin1String("alphabetic")) + m_state.textBaseline = Context2D::Alphabetic; + else if (baseline == QLatin1String("hanging")) + m_state.textBaseline = Context2D::Hanging; + else if (baseline == QLatin1String("top")) + m_state.textBaseline = Context2D::Top; + else if (baseline == QLatin1String("bottom")) + m_state.textBaseline = Context2D::Bottom; + else if (baseline == QLatin1String("middle")) + m_state.textBaseline = Context2D::Middle; + else { + m_state.textBaseline = Context2D::Alphabetic; + qWarning() << (QLatin1String("Context2D: invalid baseline:") + baseline); + } + m_state.flags |= DirtyTextBaseline; +} + +QString Context2D::textAlign() +{ + switch (m_state.textAlign) { + case Context2D::Left: + return QLatin1String("left"); + case Context2D::Right: + return QLatin1String("right"); + case Context2D::Center: + return QLatin1String("center"); + case Context2D::Start: + return QLatin1String("start"); + case Context2D::End: + return QLatin1String("end"); + default: + Q_ASSERT("invalid value"); + qWarning() << ("Context2D::invalid textAlign"); + return QLatin1String("start"); + } +} + +void Context2D::setTextAlign(const QString &baseline) +{ + if (baseline==QLatin1String("start")) + m_state.textAlign = Context2D::Start; + else if (baseline == QLatin1String("end")) + m_state.textAlign = Context2D::End; + else if (baseline == QLatin1String("left")) + m_state.textAlign = Context2D::Left; + else if (baseline == QLatin1String("right")) + m_state.textAlign = Context2D::Right; + else if (baseline == QLatin1String("center")) + m_state.textAlign = Context2D::Center; + else { + m_state.textAlign= Context2D::Start; + qWarning("Context2D: invalid text align"); + } + // ### alphabetic, ideographic, hanging + m_state.flags |= DirtyTextBaseline; +} + +void Context2D::setFont(const QString &fontString) +{ + QFont font; + // ### this is simplified and incomplete + QStringList tokens = fontString.split(QLatin1Char(QLatin1Char(' '))); + foreach (const QString &token, tokens) { + if (token == QLatin1String("italic")) + font.setItalic(true); + else if (token == QLatin1String("bold")) + font.setBold(true); + else if (token.endsWith(QLatin1String("px"))) { + QString number = token; + number.remove(QLatin1String("px")); +#ifdef Q_OS_MACX + // compensating the extra antialias space with bigger fonts + // this class is only used by the QML Profiler + // not much harm can be inflicted by this dirty hack + font.setPointSizeF(number.trimmed().toFloat()*4.0f/3.0f); +#else + font.setPointSizeF(number.trimmed().toFloat()); +#endif + } else + font.setFamily(token); + } + m_state.font = font; + m_state.flags |= DirtyFont; +} + +QString Context2D::font() +{ + return m_state.font.toString(); +} + +qreal Context2D::shadowOffsetX() const +{ + return m_state.shadowOffsetX; +} + +qreal Context2D::shadowOffsetY() const +{ + return m_state.shadowOffsetY; +} + + +qreal Context2D::shadowBlur() const +{ + return m_state.shadowBlur; +} + + +QString Context2D::shadowColor() const +{ + return m_state.shadowColor.name(); +} + + +void Context2D::clearRect(qreal x, qreal y, qreal w, qreal h) +{ + beginPainting(); + m_painter.save(); + m_painter.setMatrix(worldMatrix(), false); + m_painter.setCompositionMode(QPainter::CompositionMode_Source); + QColor fillColor = parent()->property("color").value<QColor>(); + + m_painter.fillRect(QRectF(x, y, w, h), fillColor); + m_painter.restore(); + scheduleChange(); +} + +void Context2D::fillRect(qreal x, qreal y, qreal w, qreal h) +{ + beginPainting(); + m_painter.save(); + m_painter.setMatrix(worldMatrix(), false); + m_painter.fillRect(QRectF(x, y, w, h), m_painter.brush()); + m_painter.restore(); + scheduleChange(); +} + +int Context2D::baseLineOffset(Context2D::TextBaseLine value, const QFontMetrics &metrics) +{ + int offset = 0; + switch (value) { + case Context2D::Top: + break; + case Context2D::Alphabetic: + case Context2D::Middle: + case Context2D::Hanging: + offset = metrics.ascent(); + break; + case Context2D::Bottom: + offset = metrics.height(); + break; + } + return offset; +} + +int Context2D::textAlignOffset(Context2D::TextAlign value, const QFontMetrics &metrics, const QString &text) +{ + int offset = 0; + if (value == Context2D::Start) + value = qApp->layoutDirection() == Qt::LeftToRight ? Context2D::Left : Context2D::Right; + else if (value == Context2D::End) + value = qApp->layoutDirection() == Qt::LeftToRight ? Context2D::Right: Context2D::Left; + switch (value) { + case Context2D::Center: + offset = metrics.width(text)/2; + break; + case Context2D::Right: + offset = metrics.width(text); + case Context2D::Left: + default: + break; + } + return offset; +} + +void Context2D::fillText(const QString &text, qreal x, qreal y) +{ + beginPainting(); + m_painter.save(); + m_painter.setPen(QPen(m_state.fillStyle, m_state.lineWidth)); + m_painter.setMatrix(worldMatrix(), false); + QFont font; + font.setBold(true); + m_painter.setFont(m_state.font); + int yoffset = baseLineOffset(m_state.textBaseline, m_painter.fontMetrics()); + int xoffset = textAlignOffset(m_state.textAlign, m_painter.fontMetrics(), text); + QTextOption opt; // Adjust baseLine etc + m_painter.drawText(QRectF(x-xoffset, y-yoffset, QWIDGETSIZE_MAX, m_painter.fontMetrics().height()), text, opt); + m_painter.restore(); + endPainting(); + scheduleChange(); +} + +void Context2D::strokeText(const QString &text, qreal x, qreal y) +{ + beginPainting(); + m_painter.save(); + m_painter.setPen(QPen(m_state.fillStyle,0)); + m_painter.setMatrix(worldMatrix(), false); + + QPainterPath textPath; + QFont font = m_state.font; + font.setStyleStrategy(QFont::ForceOutline); + m_painter.setFont(font); + const QFontMetrics &metrics = m_painter.fontMetrics(); + int yoffset = baseLineOffset(m_state.textBaseline, metrics); + int xoffset = textAlignOffset(m_state.textAlign, metrics, text); + textPath.addText(x-xoffset, y-yoffset+metrics.ascent(), font, text); + m_painter.strokePath(textPath, QPen(m_state.fillStyle, m_state.lineWidth)); + m_painter.restore(); + endPainting(); + scheduleChange(); +} + +void Context2D::strokeRect(qreal x, qreal y, qreal w, qreal h) +{ + QPainterPath path; + path.addRect(x, y, w, h); + beginPainting(); + m_painter.save(); + m_painter.setMatrix(worldMatrix(), false); + m_painter.strokePath(path, m_painter.pen()); + m_painter.restore(); + scheduleChange(); +} + +void Context2D::mouseArea(qreal x, qreal y, qreal w, qreal h, const QScriptValue &callback, + const QScriptValue &data) +{ + MouseArea a = { callback, data, QRectF(x, y, w, h), m_state.matrix }; + m_mouseAreas << a; +} + +void Context2D::beginPath() +{ + m_path = QPainterPath(); +} + + +void Context2D::closePath() +{ + m_path.closeSubpath(); +} + + +void Context2D::moveTo(qreal x, qreal y) +{ + QPointF pt = worldMatrix().map(QPointF(x, y)); + m_path.moveTo(pt); +} + + +void Context2D::lineTo(qreal x, qreal y) +{ + QPointF pt = worldMatrix().map(QPointF(x, y)); + m_path.lineTo(pt); +} + + +void Context2D::quadraticCurveTo(qreal cpx, qreal cpy, qreal x, qreal y) +{ + QPointF cp = worldMatrix().map(QPointF(cpx, cpy)); + QPointF xy = worldMatrix().map(QPointF(x, y)); + m_path.quadTo(cp, xy); +} + + +void Context2D::bezierCurveTo(qreal cp1x, qreal cp1y, + qreal cp2x, qreal cp2y, qreal x, qreal y) +{ + QPointF cp1 = worldMatrix().map(QPointF(cp1x, cp1y)); + QPointF cp2 = worldMatrix().map(QPointF(cp2x, cp2y)); + QPointF end = worldMatrix().map(QPointF(x, y)); + m_path.cubicTo(cp1, cp2, end); +} + + +void Context2D::arcTo(qreal x1, qreal y1, qreal x2, qreal y2, qreal radius) +{ + //FIXME: this is surely busted + QPointF st = worldMatrix().map(QPointF(x1, y1)); + QPointF end = worldMatrix().map(QPointF(x2, y2)); + m_path.arcTo(st.x(), st.y(), + end.x()-st.x(), end.y()-st.y(), + radius, 90); +} + + +void Context2D::rect(qreal x, qreal y, qreal w, qreal h) +{ + QPainterPath path; path.addRect(x, y, w, h); + path = worldMatrix().map(path); + m_path.addPath(path); +} + +void Context2D::arc(qreal xc, qreal yc, qreal radius, + qreal sar, qreal ear, + bool anticlockwise) +{ + //### HACK + // In Qt we don't switch the coordinate system for degrees + // and still use the 0,0 as bottom left for degrees so we need + // to switch + sar = -sar; + ear = -ear; + anticlockwise = !anticlockwise; + //end hack + + float sa = DEGREES(sar); + float ea = DEGREES(ear); + + double span = 0; + + double xs = xc - radius; + double ys = yc - radius; + double width = radius*2; + double height = radius*2; + + if (!anticlockwise && (ea < sa)) + span += 360; + else if (anticlockwise && (sa < ea)) + span -= 360; + + //### this is also due to switched coordinate system + // we would end up with a 0 span instead of 360 + if (!(qFuzzyCompare(span + (ea - sa) + 1, 1) && + qFuzzyCompare(qAbs(span), 360))) { + span += ea - sa; + } + + QPainterPath path; + path.moveTo(QPointF(xc + radius * cos(sar), + yc - radius * sin(sar))); + + path.arcTo(xs, ys, width, height, sa, span); + path = worldMatrix().map(path); + m_path.addPath(path); +} + + +void Context2D::fill() +{ + beginPainting(); + m_painter.fillPath(m_path, m_painter.brush()); + scheduleChange(); +} + + +void Context2D::stroke() +{ + beginPainting(); + m_painter.save(); + m_painter.setMatrix(worldMatrix(), false); + QPainterPath tmp = worldMatrix().inverted().map(m_path); + m_painter.strokePath(tmp, m_painter.pen()); + m_painter.restore(); + scheduleChange(); +} + + +void Context2D::clip() +{ + m_state.clipPath = m_path; + m_state.flags |= DirtyClippingRegion; +} + + +bool Context2D::isPointInPath(qreal x, qreal y) const +{ + return m_path.contains(QPointF(x, y)); +} + + +ImageData Context2D::getImageData(qreal sx, qreal sy, qreal sw, qreal sh) +{ + Q_UNUSED(sx); + Q_UNUSED(sy); + Q_UNUSED(sw); + Q_UNUSED(sh); + return ImageData(); +} + + +void Context2D::putImageData(ImageData image, qreal dx, qreal dy) +{ + Q_UNUSED(image); + Q_UNUSED(dx); + Q_UNUSED(dy); +} + +Context2D::Context2D(QObject *parent) + : QObject(parent), m_changeTimerId(-1), m_width(0), m_height(0), m_inPaint(false) +{ + reset(); +} + +void Context2D::setupPainter() +{ + m_painter.setRenderHint(QPainter::Antialiasing, true); + if ((m_state.flags & DirtyClippingRegion) && !m_state.clipPath.isEmpty()) + m_painter.setClipPath(m_state.clipPath); + if (m_state.flags & DirtyFillStyle) + m_painter.setBrush(m_state.fillStyle); + if (m_state.flags & DirtyGlobalAlpha) + m_painter.setOpacity(m_state.globalAlpha); + if (m_state.flags & DirtyGlobalCompositeOperation) + m_painter.setCompositionMode(m_state.globalCompositeOperation); + if (m_state.flags & MDirtyPen) { + QPen pen = m_painter.pen(); + if (m_state.flags & DirtyStrokeStyle) + pen.setBrush(m_state.strokeStyle); + if (m_state.flags & DirtyLineWidth) + pen.setWidthF(m_state.lineWidth); + if (m_state.flags & DirtyLineCap) + pen.setCapStyle(m_state.lineCap); + if (m_state.flags & DirtyLineJoin) + pen.setJoinStyle(m_state.lineJoin); + if (m_state.flags & DirtyMiterLimit) + pen.setMiterLimit(m_state.miterLimit); + m_painter.setPen(pen); + } +} + +void Context2D::beginPainting() +{ + if (m_width <= 0 || m_height <=0) + return; + + if (m_pixmap.width() != m_width || m_pixmap.height() != m_height) { + if (m_painter.isActive()) + m_painter.end(); + m_pixmap = QPixmap(m_width, m_height); + m_pixmap.fill(parent()->property("color").value<QColor>()); + } + + if (m_state.shadowBlur > 0 && m_painter.device() != &m_shadowbuffer) { + if (m_painter.isActive()) + m_painter.end(); + updateShadowBuffer(); + m_painter.begin(&m_shadowbuffer); + m_painter.setViewport(m_state.shadowOffsetX, + m_state.shadowOffsetY, + m_shadowbuffer.width(), + m_shadowbuffer.height()); + m_shadowbuffer.fill(Qt::transparent); + } + + if (!m_painter.isActive()) { + m_painter.begin(&m_pixmap); + m_painter.setRenderHint(QPainter::Antialiasing); + if (!m_state.clipPath.isEmpty()) + m_painter.setClipPath(m_state.clipPath); + m_painter.setBrush(m_state.fillStyle); + m_painter.setOpacity(m_state.globalAlpha); + QPen pen; + pen.setBrush(m_state.strokeStyle); + if (pen.style() == Qt::NoPen) + pen.setStyle(Qt::SolidLine); + pen.setCapStyle(m_state.lineCap); + pen.setJoinStyle(m_state.lineJoin); + pen.setWidthF(m_state.lineWidth); + pen.setMiterLimit(m_state.miterLimit); + m_painter.setPen(pen); + } else { + setupPainter(); + m_state.flags = 0; + } +} + +void Context2D::endPainting() +{ + if (m_state.shadowBlur > 0) { + QImage alphaChannel = m_shadowbuffer.alphaChannel(); + + qt_blurImage(alphaChannel, m_state.shadowBlur, false, 1); + + QRect imageRect = m_shadowbuffer.rect(); + + if (m_shadowColorIndexBuffer.isEmpty() || m_shadowColorBuffer != m_state.shadowColor) { + m_shadowColorIndexBuffer.clear(); + m_shadowColorBuffer = m_state.shadowColor; + + for (int i = 0; i < 256; ++i) { + m_shadowColorIndexBuffer << qRgba(qRound(255 * m_state.shadowColor.redF()), + qRound(255 * m_state.shadowColor.greenF()), + qRound(255 * m_state.shadowColor.blueF()), + i); + } + } + alphaChannel.setColorTable(m_shadowColorIndexBuffer); + + if (m_painter.isActive()) + m_painter.end(); + + m_painter.begin(&m_pixmap); + + // draw the blurred drop shadow... + m_painter.save(); + QTransform tf = m_painter.transform(); + m_painter.translate(0, imageRect.height()); + m_painter.rotate(-90); + m_painter.drawImage(0, 0, alphaChannel); + m_painter.setTransform(tf); + m_painter.restore(); + + // draw source + m_painter.drawImage(-m_state.shadowOffsetX, -m_state.shadowOffsetY, m_shadowbuffer.copy()); + m_painter.end(); + } +} + +void Context2D::clear() +{ + m_painter.fillRect(QRect(QPoint(0,0), size()), Qt::white); +} + +void Context2D::reset() +{ + m_stateStack.clear(); + m_state.matrix = QMatrix(); + m_state.clipPath = QPainterPath(); + m_state.strokeStyle = Qt::black; + m_state.fillStyle = Qt::black; + m_state.globalAlpha = 1.0; + m_state.lineWidth = 1; + m_state.lineCap = Qt::FlatCap; + m_state.lineJoin = Qt::MiterJoin; + m_state.miterLimit = 10; + m_state.shadowOffsetX = 0; + m_state.shadowOffsetY = 0; + m_state.shadowBlur = 0; + m_state.shadowColor = qRgba(0, 0, 0, 0); + m_state.globalCompositeOperation = QPainter::CompositionMode_SourceOver; + m_state.font = QFont(); + m_state.textAlign = Start; + m_state.textBaseline = Alphabetic; + m_state.flags = AllIsFullOfDirt; + m_mouseAreas.clear(); + clear(); +} + +void Context2D::drawImage(const QVariant &var, qreal sx, qreal sy, + qreal sw = 0, qreal sh = 0) +{ + CanvasImage *image = qobject_cast<CanvasImage*>(var.value<QObject*>()); + if (!image) { + Canvas *canvas = qobject_cast<Canvas*>(var.value<QObject*>()); + if (canvas) + image = canvas->toImage(); + } + if (image) { + beginPainting(); + if (sw == sh && sh == 0) + m_painter.drawPixmap(QPointF(sx, sy), image->value()); + else + m_painter.drawPixmap(QRect(sx, sy, sw, sh), image->value()); + + scheduleChange(); + } +} + +void Context2D::setSize(int width, int height) +{ + endPainting(); + m_width = width; + m_height = height; + + scheduleChange(); +} + +void Context2D::setSize(const QSize &size) +{ + setSize(size.width(), size.height()); +} + +QSize Context2D::size() const +{ + return m_pixmap.size(); +} + +QPoint Context2D::painterTranslate() const +{ + return m_painterTranslate; +} + +void Context2D::setPainterTranslate(const QPoint &translate) +{ + m_painterTranslate = translate; + m_state.flags |= DirtyTransformationMatrix; +} + +void Context2D::scheduleChange() +{ + if (m_changeTimerId == -1 && !m_inPaint) + m_changeTimerId = startTimer(0); +} + +void Context2D::timerEvent(QTimerEvent *e) +{ + if (e->timerId() == m_changeTimerId) { + killTimer(m_changeTimerId); + m_changeTimerId = -1; + endPainting(); + emit changed(); + } else { + QObject::timerEvent(e); + } +} + +QMatrix Context2D::worldMatrix() const +{ + QMatrix mat; + mat.translate(m_painterTranslate.x(), m_painterTranslate.y()); + mat *= m_state.matrix; + return mat; +} + +QT_END_NAMESPACE |