qpixmap_raster.cpp File Reference

#include "qpixmap.h"
#include <private/qfont_p.h>
#include "qpixmap_raster_p.h"
#include "qnativeimage_p.h"
#include "qimage_p.h"
#include "qpaintengine.h"
#include "qbitmap.h"
#include "qimage.h"
#include <QBuffer>
#include <QImageReader>
#include <private/qimage_p.h>
#include <private/qsimd_p.h>
#include <private/qwidget_p.h>
#include <private/qdrawhelper_p.h>

Go to the source code of this file.

Functions
void	qt_scrollRectInImage (QImage &img, const QRect &rect, const QPoint &offset)
QPixmap	qt_toRasterPixmap (const QImage &image)
QPixmap	qt_toRasterPixmap (const QPixmap &pixmap)

Variables
const uchar	qt_pixmap_bit_mask []

Function Documentation

qt_scrollRectInImage()

void qt_scrollRectInImage	(	QImage &	img,
		const QRect &	rect,
		const QPoint &	offset
	)

Definition at line 345 of file qwindowsurface.cpp.

Referenced by QRasterPixmapData::fromImageReader(), and QRasterPixmapData::scroll().

{
    // make sure we don't detach
    uchar *mem = const_cast<uchar*>(const_cast<const QImage &>(img).bits());

    int lineskip = img.bytesPerLine();
    int depth = img.depth() >> 3;

    const QRect imageRect(0, 0, img.width(), img.height());
    const QRect r = rect & imageRect & imageRect.translated(-offset);
    const QPoint p = rect.topLeft() + offset;

    if (r.isEmpty())
        return;

    const uchar *src;
    uchar *dest;

    if (r.top() < p.y()) {
        src = mem + r.bottom() * lineskip + r.left() * depth;
        dest = mem + (p.y() + r.height() - 1) * lineskip + p.x() * depth;
        lineskip = -lineskip;
    } else {
        src = mem + r.top() * lineskip + r.left() * depth;
        dest = mem + p.y() * lineskip + p.x() * depth;
    }

    const int w = r.width();
    int h = r.height();
    const int bytes = w * depth;

    // overlapping segments?
    if (offset.y() == 0 && qAbs(offset.x()) < w) {
        do {
            ::memmove(dest, src, bytes);
            dest += lineskip;
            src += lineskip;
        } while (--h);
    } else {
        do {
            ::memcpy(dest, src, bytes);
            dest += lineskip;
            src += lineskip;
        } while (--h);
    }
}

qt_toRasterPixmap() [1/2]

QPixmap qt_toRasterPixmap

(

const QImage &

image

)

Definition at line 65 of file qpixmap_raster.cpp.

Referenced by qt_toRasterPixmap().

{
    QPixmapData *data =
        new QRasterPixmapData(image.depth() == 1
                           ? QPixmapData::BitmapType
                           : QPixmapData::PixmapType);

    data->fromImage(image, Qt::AutoColor);

    return QPixmap(data);
}

qt_toRasterPixmap() [2/2]

QPixmap qt_toRasterPixmap

(

const QPixmap &

pixmap

)

Definition at line 77 of file qpixmap_raster.cpp.

{
    if (pixmap.isNull())
        return QPixmap();

    if (QPixmap(pixmap).data_ptr()->classId() == QPixmapData::RasterClass)
        return pixmap;

    return qt_toRasterPixmap(pixmap.toImage());
}

Variable Documentation

qt_pixmap_bit_mask

const uchar qt_pixmap_bit_mask[]

Initial value:

= { 0x01, 0x02, 0x04, 0x08,
                                     0x10, 0x20, 0x40, 0x80 }

Definition at line 62 of file qpixmap_raster.cpp.

Referenced by QRasterPixmapData::setMask().