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| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
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| ** This file is part of the QtGui module of the Qt Toolkit. |
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| ****************************************************************************/ |
| |
| #ifndef QPAINTENGINE_ALPHA_P_H |
| #define QPAINTENGINE_ALPHA_P_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists for the convenience |
| // of other Qt classes. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include <QtCore/qglobal.h> |
| |
| #ifndef QT_NO_PRINTER |
| #include "private/qpaintengine_p.h" |
| #include <QtPrintSupport/qtprintsupportglobal.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QAlphaPaintEnginePrivate; |
| |
| class Q_PRINTSUPPORT_EXPORT QAlphaPaintEngine : public QPaintEngine |
| { |
| Q_DECLARE_PRIVATE(QAlphaPaintEngine) |
| public: |
| ~QAlphaPaintEngine(); |
| |
| virtual bool begin(QPaintDevice *pdev); |
| virtual bool end(); |
| |
| virtual void updateState(const QPaintEngineState &state); |
| |
| virtual void drawPath(const QPainterPath &path); |
| |
| virtual void drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode); |
| |
| virtual void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr); |
| virtual void drawTextItem(const QPointF &p, const QTextItem &textItem); |
| virtual void drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s); |
| |
| protected: |
| QAlphaPaintEngine(QAlphaPaintEnginePrivate &data, PaintEngineFeatures devcaps = 0); |
| QRegion alphaClipping() const; |
| bool continueCall() const; |
| void flushAndInit(bool init = true); |
| void cleanUp(); |
| }; |
| |
| class QAlphaPaintEnginePrivate : public QPaintEnginePrivate |
| { |
| Q_DECLARE_PUBLIC(QAlphaPaintEngine) |
| public: |
| QAlphaPaintEnginePrivate(); |
| ~QAlphaPaintEnginePrivate(); |
| |
| int m_pass; |
| QPicture *m_pic; |
| QPaintEngine *m_picengine; |
| QPainter *m_picpainter; |
| |
| QPaintEngine::PaintEngineFeatures m_savedcaps; |
| QPaintDevice *m_pdev; |
| |
| QRegion m_alphargn; |
| QRegion m_cliprgn; |
| QRegion m_dirtyrgn; |
| |
| bool m_hasalpha; |
| bool m_alphaPen; |
| bool m_alphaBrush; |
| bool m_alphaOpacity; |
| bool m_advancedPen; |
| bool m_advancedBrush; |
| bool m_complexTransform; |
| bool m_emulateProjectiveTransforms; |
| bool m_continueCall; |
| |
| QTransform m_transform; |
| QPen m_pen; |
| |
| void addAlphaRect(const QRectF &rect); |
| void addDirtyRect(const QRectF &rect) { m_dirtyrgn |= rect.toAlignedRect(); } |
| bool canSeeTroughBackground(bool somethingInRectHasAlpha, const QRectF &rect) const; |
| |
| QRectF addPenWidth(const QPainterPath &path); |
| void drawAlphaImage(const QRectF &rect); |
| QRect toRect(const QRectF &rect) const; |
| bool fullyContained(const QRectF &rect) const; |
| |
| void resetState(QPainter *p); |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif // QT_NO_PRINTER |
| |
| #endif // QPAINTENGINE_ALPHA_P_H |