You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
305 lines
8.8 KiB
305 lines
8.8 KiB
/****************************************************************************
|
|
**
|
|
** Implementation of QBitmap class
|
|
**
|
|
** Created : 941020
|
|
**
|
|
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
|
|
**
|
|
** This file is part of the kernel module of the Qt GUI Toolkit.
|
|
**
|
|
** This file may be used under the terms of the GNU General
|
|
** Public License versions 2.0 or 3.0 as published by the Free
|
|
** Software Foundation and appearing in the files LICENSE.GPL2
|
|
** and LICENSE.GPL3 included in the packaging of this file.
|
|
** Alternatively you may (at your option) use any later version
|
|
** of the GNU General Public License if such license has been
|
|
** publicly approved by Trolltech ASA (or its successors, if any)
|
|
** and the KDE Free Qt Foundation.
|
|
**
|
|
** Please review the following information to ensure GNU General
|
|
** Public Licensing requirements will be met:
|
|
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
|
|
** If you are unsure which license is appropriate for your use, please
|
|
** review the following information:
|
|
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
|
|
** or contact the sales department at sales@trolltech.com.
|
|
**
|
|
** This file may be used under the terms of the Q Public License as
|
|
** defined by Trolltech ASA and appearing in the file LICENSE.QPL
|
|
** included in the packaging of this file. Licensees holding valid Qt
|
|
** Commercial licenses may use this file in accordance with the Qt
|
|
** Commercial License Agreement provided with the Software.
|
|
**
|
|
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
|
|
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
|
|
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
|
|
** herein.
|
|
**
|
|
**********************************************************************/
|
|
|
|
#include "qbitmap.h"
|
|
#include "qimage.h"
|
|
|
|
|
|
/*!
|
|
\class QBitmap qbitmap.h
|
|
\brief The QBitmap class provides monochrome (1-bit depth) pixmaps.
|
|
|
|
\ingroup graphics
|
|
\ingroup images
|
|
\ingroup shared
|
|
|
|
The QBitmap class is a monochrome off-screen paint device used
|
|
mainly for creating custom QCursor and QBrush objects, in
|
|
QPixmap::setMask() and for QRegion.
|
|
|
|
A QBitmap is a QPixmap with a \link QPixmap::depth() depth\endlink
|
|
of 1. If a pixmap with a depth greater than 1 is assigned to a
|
|
bitmap, the bitmap will be dithered automatically. A QBitmap is
|
|
guaranteed to always have the depth 1, unless it is
|
|
QPixmap::isNull() which has depth 0.
|
|
|
|
When drawing in a QBitmap (or QPixmap with depth 1), we recommend
|
|
using the QColor objects \c Qt::color0 and \c Qt::color1.
|
|
Painting with \c color0 sets the bitmap bits to 0, and painting
|
|
with \c color1 sets the bits to 1. For a bitmap, 0-bits indicate
|
|
background (or transparent) and 1-bits indicate foreground (or
|
|
opaque). Using the \c black and \c white QColor objects make no
|
|
sense because the QColor::pixel() value is not necessarily 0 for
|
|
black and 1 for white.
|
|
|
|
The QBitmap can be transformed (translated, scaled, sheared or
|
|
rotated) using xForm().
|
|
|
|
Just like the QPixmap class, QBitmap is optimized by the use of
|
|
\link shclass.html implicit sharing\endlink, so it is very
|
|
efficient to pass QBitmap objects as arguments.
|
|
|
|
\sa QPixmap, QPainter::drawPixmap(), bitBlt(), \link shclass.html Shared Classes\endlink
|
|
*/
|
|
|
|
|
|
/*!
|
|
Constructs a null bitmap.
|
|
|
|
\sa QPixmap::isNull()
|
|
*/
|
|
|
|
QBitmap::QBitmap()
|
|
{
|
|
data->bitmap = TRUE;
|
|
}
|
|
|
|
|
|
/*!
|
|
Constructs a bitmap with width \a w and height \a h.
|
|
|
|
The contents of the bitmap is uninitialized if \a clear is FALSE;
|
|
otherwise it is filled with pixel value 0 (the QColor \c
|
|
Qt::color0).
|
|
|
|
The optional \a optimization argument specifies the optimization
|
|
setting for the bitmap. The default optimization should be used in
|
|
most cases. Games and other pixmap-intensive applications may
|
|
benefit from setting this argument; see \l{QPixmap::Optimization}.
|
|
|
|
\sa QPixmap::setOptimization(), QPixmap::setDefaultOptimization()
|
|
*/
|
|
|
|
QBitmap::QBitmap( int w, int h, bool clear,
|
|
QPixmap::Optimization optimization )
|
|
: QPixmap( w, h, 1, optimization )
|
|
{
|
|
data->bitmap = TRUE;
|
|
if ( clear )
|
|
fill( Qt::color0 );
|
|
}
|
|
|
|
|
|
/*!
|
|
\overload
|
|
|
|
Constructs a bitmap with the size \a size.
|
|
|
|
The contents of the bitmap is uninitialized if \a clear is FALSE;
|
|
otherwise it is filled with pixel value 0 (the QColor \c
|
|
Qt::color0).
|
|
|
|
The optional \a optimization argument specifies the optimization
|
|
setting for the bitmap. The default optimization should be used in
|
|
most cases. Games and other pixmap-intensive applications may
|
|
benefit from setting this argument; see \l{QPixmap::Optimization}.
|
|
*/
|
|
|
|
QBitmap::QBitmap( const QSize &size, bool clear,
|
|
QPixmap::Optimization optimization )
|
|
: QPixmap( size, 1, optimization )
|
|
{
|
|
data->bitmap = TRUE;
|
|
if ( clear )
|
|
fill( Qt::color0 );
|
|
}
|
|
|
|
|
|
/*!
|
|
Constructs a bitmap with width \a w and height \a h and sets the
|
|
contents to \a bits.
|
|
|
|
The \a isXbitmap flag should be TRUE if \a bits was generated by
|
|
the X11 bitmap program. The X bitmap bit order is little endian.
|
|
The QImage documentation discusses bit order of monochrome images.
|
|
|
|
Example (creates an arrow bitmap):
|
|
\code
|
|
uchar arrow_bits[] = { 0x3f, 0x1f, 0x0f, 0x1f, 0x3b, 0x71, 0xe0, 0xc0 };
|
|
QBitmap bm( 8, 8, arrow_bits, TRUE );
|
|
\endcode
|
|
*/
|
|
|
|
QBitmap::QBitmap( int w, int h, const uchar *bits, bool isXbitmap )
|
|
: QPixmap( w, h, bits, isXbitmap )
|
|
{
|
|
data->bitmap = TRUE;
|
|
}
|
|
|
|
|
|
/*!
|
|
\overload
|
|
|
|
Constructs a bitmap with the size \a size and sets the contents to
|
|
\a bits.
|
|
|
|
The \a isXbitmap flag should be TRUE if \a bits was generated by
|
|
the X11 bitmap program. The X bitmap bit order is little endian.
|
|
The QImage documentation discusses bit order of monochrome images.
|
|
*/
|
|
|
|
QBitmap::QBitmap( const QSize &size, const uchar *bits, bool isXbitmap )
|
|
: QPixmap( size.width(), size.height(), bits, isXbitmap )
|
|
{
|
|
data->bitmap = TRUE;
|
|
}
|
|
|
|
|
|
/*!
|
|
Constructs a bitmap that is a copy of \a bitmap.
|
|
*/
|
|
|
|
QBitmap::QBitmap( const QBitmap &bitmap )
|
|
: QPixmap( bitmap )
|
|
{
|
|
}
|
|
|
|
#ifndef QT_NO_IMAGEIO
|
|
/*!
|
|
Constructs a bitmap from the file \a fileName. If the file does
|
|
not exist or is of an unknown format, the bitmap becomes a null
|
|
bitmap.
|
|
|
|
The parameters \a fileName and \a format are passed on to
|
|
QPixmap::load(). Dithering will be performed if the file format
|
|
uses more than 1 bit per pixel.
|
|
|
|
\sa QPixmap::isNull(), QPixmap::load(), QPixmap::loadFromData(),
|
|
QPixmap::save(), QPixmap::imageFormat()
|
|
*/
|
|
|
|
QBitmap::QBitmap( const QString& fileName, const char *format )
|
|
: QPixmap() // Will set bitmap to null bitmap, explicit call for clarity
|
|
{
|
|
data->bitmap = TRUE;
|
|
load( fileName, format, Mono );
|
|
}
|
|
#endif
|
|
|
|
/*!
|
|
Assigns the bitmap \a bitmap to this bitmap and returns a
|
|
reference to this bitmap.
|
|
*/
|
|
|
|
QBitmap &QBitmap::operator=( const QBitmap &bitmap )
|
|
{
|
|
QPixmap::operator=(bitmap);
|
|
#if defined(QT_CHECK_STATE)
|
|
Q_ASSERT( data->bitmap );
|
|
#endif
|
|
return *this;
|
|
}
|
|
|
|
|
|
/*!
|
|
\overload
|
|
|
|
Assigns the pixmap \a pixmap to this bitmap and returns a
|
|
reference to this bitmap.
|
|
|
|
Dithering will be performed if the pixmap has a QPixmap::depth()
|
|
greater than 1.
|
|
*/
|
|
|
|
QBitmap &QBitmap::operator=( const QPixmap &pixmap )
|
|
{
|
|
if ( pixmap.isNull() ) { // a null pixmap
|
|
QBitmap bm( 0, 0, FALSE, pixmap.optimization() );
|
|
QBitmap::operator=(bm);
|
|
} else if ( pixmap.depth() == 1 ) { // 1-bit pixmap
|
|
if ( pixmap.isQBitmap() ) { // another QBitmap
|
|
QPixmap::operator=(pixmap); // shallow assignment
|
|
} else { // not a QBitmap, but 1-bit
|
|
QBitmap bm( pixmap.size(), FALSE, pixmap.optimization() );
|
|
bitBlt( &bm, 0,0, &pixmap, 0,0,pixmap.width(),pixmap.height() );
|
|
QBitmap::operator=(bm);
|
|
}
|
|
} else { // n-bit depth pixmap
|
|
QImage image;
|
|
image = pixmap; // convert pixmap to image
|
|
*this = image; // will dither image
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
|
|
/*!
|
|
\overload
|
|
|
|
Converts the image \a image to a bitmap and assigns the result to
|
|
this bitmap. Returns a reference to the bitmap.
|
|
|
|
Dithering will be performed if the image has a QImage::depth()
|
|
greater than 1.
|
|
*/
|
|
|
|
QBitmap &QBitmap::operator=( const QImage &image )
|
|
{
|
|
convertFromImage( image );
|
|
return *this;
|
|
}
|
|
|
|
|
|
#ifndef QT_NO_PIXMAP_TRANSFORMATION
|
|
/*!
|
|
Returns a transformed copy of this bitmap by using \a matrix.
|
|
|
|
This function does exactly the same as QPixmap::xForm(), except
|
|
that it returns a QBitmap instead of a QPixmap.
|
|
|
|
\sa QPixmap::xForm()
|
|
*/
|
|
|
|
QBitmap QBitmap::xForm( const QWMatrix &matrix ) const
|
|
{
|
|
QPixmap pm = QPixmap::xForm( matrix );
|
|
QBitmap bm;
|
|
// Here we fake the pixmap to think it's a QBitmap. With this trick,
|
|
// the QBitmap::operator=(const QPixmap&) will just refer the
|
|
// pm.data and we do not need to perform a bitBlt.
|
|
pm.data->bitmap = TRUE;
|
|
bm = pm;
|
|
return bm;
|
|
}
|
|
#endif // QT_NO_TRANSFORMATIONS
|
|
|
|
|
|
|