diff options
Diffstat (limited to 'src/gui/painting/qpainter.cpp')
-rw-r--r-- | src/gui/painting/qpainter.cpp | 120 |
1 files changed, 114 insertions, 6 deletions
diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp index f24eafd..314f349 100644 --- a/src/gui/painting/qpainter.cpp +++ b/src/gui/painting/qpainter.cpp @@ -88,14 +88,19 @@ bool qt_show_painter_debug_output = true; extern QPixmap qt_pixmapForBrush(int style, bool invert); -static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, QFontEngine *fe, - QTextCharFormat::UnderlineStyle underlineStyle, - QTextItemInt::RenderFlags flags, qreal width, - const QTextCharFormat &charFormat); void qt_format_text(const QFont &font, const QRectF &_r, int tf, const QTextOption *option, const QString& str, QRectF *brect, int tabstops, int* tabarray, int tabarraylen, QPainter *painter); +static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, const QFontEngine *fe, + QTextCharFormat::UnderlineStyle underlineStyle, + QTextItem::RenderFlags flags, qreal width, + const QTextCharFormat &charFormat); +// Helper function to calculate left most position, width and flags for decoration drawing +static void drawDecorationForGlyphs(QPainter *painter, const glyph_t *glyphArray, + const QFixedPoint *positions, int glyphCount, + QFontEngine *fontEngine, const QFont &font, + const QTextCharFormat &charFormat); static inline QGradient::CoordinateMode coordinateMode(const QBrush &brush) { @@ -2702,6 +2707,61 @@ QPainterPath QPainter::clipPath() const } /*! + Returns the bounding rectangle of the current clip if there is a clip; + otherwise returns an empty rectangle. Note that the clip region is + given in logical coordinates. + + The bounding rectangle is not guaranteed to be tight. + + \sa setClipRect(), setClipPath(), setClipRegion() + + \since 4.8 + */ + +QRectF QPainter::clipBoundingRect() const +{ + Q_D(const QPainter); + + if (!d->engine) { + qWarning("QPainter::clipBoundingRect: Painter not active"); + return QRectF(); + } + + // Accumulate the bounding box in device space. This is not 100% + // precise, but it fits within the guarantee and it is resonably + // fast. + QRectF bounds; + for (int i=0; i<d->state->clipInfo.size(); ++i) { + QRectF r; + const QPainterClipInfo &info = d->state->clipInfo.at(i); + + if (info.clipType == QPainterClipInfo::RectClip) + r = info.rect; + else if (info.clipType == QPainterClipInfo::RegionClip) + r = info.region.boundingRect(); + else + r = info.path.boundingRect(); + + r = info.matrix.mapRect(r); + + if (i == 0) + bounds = r; + else if (info.operation == Qt::IntersectClip) + bounds &= r; + else if (info.operation == Qt::UniteClip) + bounds |= r; + } + + + // Map the rectangle back into logical space using the inverse + // matrix. + if (!d->txinv) + const_cast<QPainter *>(this)->d_ptr->updateInvMatrix(); + + return d->invMatrix.mapRect(bounds); +} + +/*! \fn void QPainter::setClipRect(const QRectF &rectangle, Qt::ClipOperation operation) Enables clipping, and sets the clip region to the given \a @@ -5996,6 +6056,10 @@ void QPainter::drawStaticText(const QPointF &topLeftPosition, const QStaticText currentColor = item->color; } d->extended->drawStaticTextItem(item); + + drawDecorationForGlyphs(this, item->glyphs, item->glyphPositions, + item->numGlyphs, item->fontEngine, staticText_d->font, + QTextCharFormat()); } if (currentColor != oldPen.color()) setPen(oldPen); @@ -6363,9 +6427,9 @@ static QPixmap generateWavyPixmap(qreal maxRadius, const QPen &pen) return pixmap; } -static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, QFontEngine *fe, +static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, const QFontEngine *fe, QTextCharFormat::UnderlineStyle underlineStyle, - QTextItemInt::RenderFlags flags, qreal width, + QTextItem::RenderFlags flags, qreal width, const QTextCharFormat &charFormat) { if (underlineStyle == QTextCharFormat::NoUnderline @@ -6439,6 +6503,50 @@ static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, QFontE painter->setBrush(oldBrush); } +static void drawDecorationForGlyphs(QPainter *painter, const glyph_t *glyphArray, + const QFixedPoint *positions, int glyphCount, + QFontEngine *fontEngine, const QFont &font, + const QTextCharFormat &charFormat) +{ + if (!(font.underline() || font.strikeOut() || font.overline())) + return; + + QFixed leftMost; + QFixed rightMost; + QFixed baseLine; + for (int i=0; i<glyphCount; ++i) { + glyph_metrics_t gm = fontEngine->boundingBox(glyphArray[i]); + if (i == 0 || leftMost > positions[i].x) + leftMost = positions[i].x; + + // We don't support glyphs that do not share a common baseline. If this turns out to + // be a relevant use case, then we need to find clusters of glyphs that share a baseline + // and do a drawTextItemDecorations call per cluster. + if (i == 0 || baseLine < positions[i].y) + baseLine = positions[i].y; + + // We use the advance rather than the actual bounds to match the algorithm in drawText() + if (i == 0 || rightMost < positions[i].x + gm.xoff) + rightMost = positions[i].x + gm.xoff; + } + + QFixed width = rightMost - leftMost; + QTextItem::RenderFlags flags = 0; + + if (font.underline()) + flags |= QTextItem::Underline; + if (font.overline()) + flags |= QTextItem::Overline; + if (font.strikeOut()) + flags |= QTextItem::StrikeOut; + + drawTextItemDecoration(painter, QPointF(leftMost.toReal(), baseLine.toReal()), + fontEngine, + font.underline() ? QTextCharFormat::SingleUnderline + : QTextCharFormat::NoUnderline, flags, + width.toReal(), charFormat); +} + void QPainter::drawTextItem(const QPointF &p, const QTextItem &_ti) { #ifdef QT_DEBUG_DRAW |