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