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authorAriya Hidayat <ariya.hidayat@nokia.com>2009-09-14 10:24:33 (GMT)
committerAriya Hidayat <ariya.hidayat@nokia.com>2009-09-14 13:10:13 (GMT)
commit97594601ca84ae11f30bb35e6cbc7e3f70e0624d (patch)
tree88a755b717059517cd8d5e6d1fa7499ed3c221de /src
parentf272d891a1fb622ced7a92d426099996f7890945 (diff)
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Add strength factor to the colorize filter.
To allow fading between the original and the colorized version of the pixmaps, a new strength factor is introduced, 0.0 means the filter has no effect at all, 1.0 means full colorization. Still missing is the non-raster implementation. Autotest: included Reviewed-by: Bjørn Erik Nilsen
Diffstat (limited to 'src')
-rw-r--r--src/gui/image/qpixmapfilter.cpp51
-rw-r--r--src/gui/image/qpixmapfilter_p.h3
2 files changed, 53 insertions, 1 deletions
diff --git a/src/gui/image/qpixmapfilter.cpp b/src/gui/image/qpixmapfilter.cpp
index 15704ba..4fa2e6c 100644
--- a/src/gui/image/qpixmapfilter.cpp
+++ b/src/gui/image/qpixmapfilter.cpp
@@ -759,6 +759,10 @@ class QPixmapColorizeFilterPrivate : public QPixmapFilterPrivate
Q_DECLARE_PUBLIC(QPixmapColorizeFilter)
public:
QColor color;
+ qreal strength;
+ quint32 opaque : 1;
+ quint32 alphaBlend : 1;
+ quint32 padding : 30;
};
/*!
@@ -771,7 +775,11 @@ public:
QPixmapColorizeFilter::QPixmapColorizeFilter(QObject *parent)
: QPixmapFilter(*new QPixmapColorizeFilterPrivate, ColorizeFilter, parent)
{
- d_func()->color = QColor(0, 0, 192);
+ Q_D(QPixmapColorizeFilter);
+ d->color = QColor(0, 0, 192);
+ d->strength = qreal(1);
+ d->opaque = true;
+ d->alphaBlend = false;
}
/*!
@@ -797,6 +805,31 @@ void QPixmapColorizeFilter::setColor(const QColor &color)
}
/*!
+ Gets the strength of the colorize filter, 1.0 means full colorized while
+ 0.0 equals to no filtering at all.
+
+ \internal
+*/
+qreal QPixmapColorizeFilter::strength() const
+{
+ Q_D(const QPixmapColorizeFilter);
+ return d->strength;
+}
+
+/*!
+ Sets the strength of the colorize filter to \a strength.
+
+ \internal
+*/
+void QPixmapColorizeFilter::setStrength(qreal strength)
+{
+ Q_D(QPixmapColorizeFilter);
+ d->strength = qBound(qreal(0), strength, qreal(1));
+ d->opaque = !qFuzzyIsNull(d->strength);
+ d->alphaBlend = !qFuzzyIsNull(d->strength - 1);
+}
+
+/*!
\internal
*/
void QPixmapColorizeFilter::draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect) const
@@ -807,6 +840,7 @@ void QPixmapColorizeFilter::draw(QPainter *painter, const QPointF &dest, const Q
QPixmapColorizeFilter *colorizeFilter = static_cast<QPixmapColorizeFilter*>(filter);
if (colorizeFilter) {
colorizeFilter->setColor(d->color);
+ colorizeFilter->setStrength(d->strength);
colorizeFilter->draw(painter, dest, src, srcRect);
delete colorizeFilter;
return;
@@ -814,6 +848,11 @@ void QPixmapColorizeFilter::draw(QPainter *painter, const QPointF &dest, const Q
// falling back to raster implementation
+ if (!d->opaque) {
+ painter->drawPixmap(dest, src, srcRect);
+ return;
+ }
+
QImage srcImage;
QImage destImage;
@@ -836,6 +875,16 @@ void QPixmapColorizeFilter::draw(QPainter *painter, const QPointF &dest, const Q
destPainter.fillRect(srcImage.rect(), d->color);
destPainter.end();
+ if (d->alphaBlend) {
+ // alpha blending srcImage and destImage
+ QImage buffer = srcImage;
+ QPainter bufPainter(&buffer);
+ bufPainter.setOpacity(d->strength);
+ bufPainter.drawImage(0, 0, destImage);
+ bufPainter.end();
+ destImage = buffer;
+ }
+
if (srcImage.hasAlphaChannel())
destImage.setAlphaChannel(srcImage.alphaChannel());
diff --git a/src/gui/image/qpixmapfilter_p.h b/src/gui/image/qpixmapfilter_p.h
index 4cbf7a3..2565110 100644
--- a/src/gui/image/qpixmapfilter_p.h
+++ b/src/gui/image/qpixmapfilter_p.h
@@ -155,6 +155,9 @@ public:
void setColor(const QColor& color);
QColor color() const;
+ void setStrength(qreal strength);
+ qreal strength() const;
+
void draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect = QRectF()) const;
};