qdeclarativetextlayout.cpp File Reference

#include "qdeclarativetextlayout_p.h"
#include <private/qstatictext_p.h>
#include <private/qfontengine_p.h>
#include <private/qtextengine_p.h>
#include <private/qpainter_p.h>
#include <private/qpaintengineex_p.h>

Go to the source code of this file.

Classes
class	QDeclarativeTextLayoutPrivate

Functions
	Q_GLOBAL_STATIC (InertTextPainter, inertTextPainter)
Q_GUI_EXPORT void	qt_draw_decoration_for_glyphs (QPainter *painter, const glyph_t *glyphArray, const QFixedPoint *positions, int glyphCount, QFontEngine *fontEngine, const QFont &font, const QTextCharFormat &charFormat)

Function Documentation

Q_GLOBAL_STATIC()

Q_GLOBAL_STATIC	(	InertTextPainter	,
		inertTextPainter
	)

qt_draw_decoration_for_glyphs()

Q_GUI_EXPORT void qt_draw_decoration_for_glyphs	(	QPainter *	painter,
		const glyph_t *	glyphArray,
		const QFixedPoint *	positions,
		int	glyphCount,
		QFontEngine *	fontEngine,
		const QFont &	font,
		const QTextCharFormat &	charFormat
	)

Definition at line 6820 of file qpainter.cpp.

Referenced by QDeclarativeTextLayout::draw(), QPainter::drawStaticText(), and QDeclarativeTextLayout::prepare().

{
    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);
}