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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/qbitmap.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
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| -rw-r--r-- | doc/html/qbitmap.html | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/doc/html/qbitmap.html b/doc/html/qbitmap.html new file mode 100644 index 0000000..59dabe5 --- /dev/null +++ b/doc/html/qbitmap.html @@ -0,0 +1,186 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qbitmap.cpp:42 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>QBitmap Class</title> +<style type="text/css"><!-- +fn { margin-left: 1cm; text-indent: -1cm; } +a:link { color: #004faf; text-decoration: none } +a:visited { color: #672967; text-decoration: none } +body { background: #ffffff; color: black; } +--></style> +</head> +<body> + +<table border="0" cellpadding="0" cellspacing="0" width="100%"> +<tr bgcolor="#E5E5E5"> +<td valign=center> + <a href="index.html"> +<font color="#004faf">Home</font></a> + | <a href="classes.html"> +<font color="#004faf">All Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped Classes</font></a> + | <a href="functions.html"> +<font color="#004faf">Functions</font></a> +</td> +<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QBitmap Class Reference</h1> + +<p>The QBitmap class provides monochrome (1-bit depth) pixmaps. +<a href="#details">More...</a> +<p><tt>#include <<a href="qbitmap-h.html">qbitmap.h</a>></tt> +<p>Inherits <a href="qpixmap.html">QPixmap</a>. +<p><a href="qbitmap-members.html">List of all member functions.</a> +<h2>Public Members</h2> +<ul> +<li class=fn><a href="#QBitmap"><b>QBitmap</b></a> ()</li> +<li class=fn><a href="#QBitmap-2"><b>QBitmap</b></a> ( int w, int h, bool clear = FALSE, QPixmap::Optimization optimization = QPixmap::DefaultOptim )</li> +<li class=fn><a href="#QBitmap-3"><b>QBitmap</b></a> ( const QSize & size, bool clear = FALSE, QPixmap::Optimization optimization = QPixmap::DefaultOptim )</li> +<li class=fn><a href="#QBitmap-4"><b>QBitmap</b></a> ( int w, int h, const uchar * bits, bool isXbitmap = FALSE )</li> +<li class=fn><a href="#QBitmap-5"><b>QBitmap</b></a> ( const QSize & size, const uchar * bits, bool isXbitmap = FALSE )</li> +<li class=fn><a href="#QBitmap-6"><b>QBitmap</b></a> ( const QBitmap & bitmap )</li> +<li class=fn><a href="#QBitmap-7"><b>QBitmap</b></a> ( const QString & fileName, const char * format = 0 )</li> +<li class=fn>QBitmap & <a href="#operator-eq"><b>operator=</b></a> ( const QBitmap & bitmap )</li> +<li class=fn>QBitmap & <a href="#operator-eq-2"><b>operator=</b></a> ( const QPixmap & pixmap )</li> +<li class=fn>QBitmap & <a href="#operator-eq-3"><b>operator=</b></a> ( const QImage & image )</li> +<li class=fn>QBitmap <a href="#xForm"><b>xForm</b></a> ( const QWMatrix & matrix ) const</li> +</ul> +<hr><a name="details"></a><h2>Detailed Description</h2> + + +The QBitmap class provides monochrome (1-bit depth) pixmaps. +<p> + + +<p> The QBitmap class is a monochrome off-screen paint device used +mainly for creating custom <a href="qcursor.html">QCursor</a> and <a href="qbrush.html">QBrush</a> objects, in +<a href="qpixmap.html#setMask">QPixmap::setMask</a>() and for <a href="qregion.html">QRegion</a>. +<p> A QBitmap is a <a href="qpixmap.html">QPixmap</a> with a <a href="qpixmap.html#depth">depth</a> +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 +<a href="qpixmap.html#isNull">QPixmap::isNull</a>() which has depth 0. +<p> When drawing in a QBitmap (or QPixmap with depth 1), we recommend +using the <a href="qcolor.html">QColor</a> objects <tt>Qt::color0</tt> and <tt>Qt::color1</tt>. +Painting with <tt>color0</tt> sets the bitmap bits to 0, and painting +with <tt>color1</tt> sets the bits to 1. For a bitmap, 0-bits indicate +background (or transparent) and 1-bits indicate foreground (or +opaque). Using the <tt>black</tt> and <tt>white</tt> QColor objects make no +sense because the <a href="qcolor.html#pixel">QColor::pixel</a>() value is not necessarily 0 for +black and 1 for white. +<p> The QBitmap can be transformed (translated, scaled, sheared or +rotated) using <a href="#xForm">xForm</a>(). +<p> Just like the <a href="qpixmap.html">QPixmap</a> class, QBitmap is optimized by the use of +<a href="shclass.html">implicit sharing</a>, so it is very +efficient to pass QBitmap objects as arguments. +<p> <p>See also <a href="qpixmap.html">QPixmap</a>, <a href="qpainter.html#drawPixmap">QPainter::drawPixmap</a>(), <a href="qpaintdevice.html#bitBlt">bitBlt</a>(), <a href="shclass.html">Shared Classes</a>, <a href="graphics.html">Graphics Classes</a>, <a href="images.html">Image Processing Classes</a>, and <a href="shared.html">Implicitly and Explicitly Shared Classes</a>. + +<hr><h2>Member Function Documentation</h2> +<h3 class=fn><a name="QBitmap"></a>QBitmap::QBitmap () +</h3> +Constructs a null bitmap. +<p> <p>See also <a href="qpixmap.html#isNull">QPixmap::isNull</a>(). + +<h3 class=fn><a name="QBitmap-2"></a>QBitmap::QBitmap ( int w, int h, bool clear = FALSE, <a href="qpixmap.html#Optimization-enum">QPixmap::Optimization</a> optimization = QPixmap::DefaultOptim ) +</h3> +Constructs a bitmap with width <em>w</em> and height <em>h</em>. +<p> The contents of the bitmap is uninitialized if <em>clear</em> is FALSE; +otherwise it is filled with pixel value 0 (the <a href="qcolor.html">QColor</a> <tt>Qt::color0</tt>). +<p> The optional <em>optimization</em> 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 <a href="qpixmap.html#Optimization-enum">QPixmap::Optimization</a>. +<p> <p>See also <a href="qpixmap.html#setOptimization">QPixmap::setOptimization</a>() and <a href="qpixmap.html#setDefaultOptimization">QPixmap::setDefaultOptimization</a>(). + +<h3 class=fn><a name="QBitmap-3"></a>QBitmap::QBitmap ( const <a href="qsize.html">QSize</a> & size, bool clear = FALSE, <a href="qpixmap.html#Optimization-enum">QPixmap::Optimization</a> optimization = QPixmap::DefaultOptim ) +</h3> +This is an overloaded member function, provided for convenience. It behaves essentially like the above function. +<p> Constructs a bitmap with the size <em>size</em>. +<p> The contents of the bitmap is uninitialized if <em>clear</em> is FALSE; +otherwise it is filled with pixel value 0 (the <a href="qcolor.html">QColor</a> <tt>Qt::color0</tt>). +<p> The optional <em>optimization</em> 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 <a href="qpixmap.html#Optimization-enum">QPixmap::Optimization</a>. + +<h3 class=fn><a name="QBitmap-4"></a>QBitmap::QBitmap ( int w, int h, const uchar * bits, bool isXbitmap = FALSE ) +</h3> +Constructs a bitmap with width <em>w</em> and height <em>h</em> and sets the +contents to <em>bits</em>. +<p> The <em>isXbitmap</em> flag should be TRUE if <em>bits</em> was generated by +the X11 bitmap program. The X bitmap bit order is little endian. +The <a href="qimage.html">QImage</a> documentation discusses bit order of monochrome images. +<p> Example (creates an arrow bitmap): +<pre> + uchar arrow_bits[] = { 0x3f, 0x1f, 0x0f, 0x1f, 0x3b, 0x71, 0xe0, 0xc0 }; + QBitmap bm( 8, 8, arrow_bits, TRUE ); + </pre> + + +<h3 class=fn><a name="QBitmap-5"></a>QBitmap::QBitmap ( const <a href="qsize.html">QSize</a> & size, const uchar * bits, bool isXbitmap = FALSE ) +</h3> +This is an overloaded member function, provided for convenience. It behaves essentially like the above function. +<p> Constructs a bitmap with the size <em>size</em> and sets the contents to +<em>bits</em>. +<p> The <em>isXbitmap</em> flag should be TRUE if <em>bits</em> was generated by +the X11 bitmap program. The X bitmap bit order is little endian. +The <a href="qimage.html">QImage</a> documentation discusses bit order of monochrome images. + +<h3 class=fn><a name="QBitmap-6"></a>QBitmap::QBitmap ( const <a href="qbitmap.html">QBitmap</a> & bitmap ) +</h3> +Constructs a bitmap that is a copy of <em>bitmap</em>. + +<h3 class=fn><a name="QBitmap-7"></a>QBitmap::QBitmap ( const <a href="qstring.html">QString</a> & fileName, const char * format = 0 ) +</h3> +Constructs a bitmap from the file <em>fileName</em>. If the file does +not exist or is of an unknown format, the bitmap becomes a null +bitmap. +<p> The parameters <em>fileName</em> and <em>format</em> are passed on to +<a href="qpixmap.html#load">QPixmap::load</a>(). Dithering will be performed if the file format +uses more than 1 bit per pixel. +<p> <p>See also <a href="qpixmap.html#isNull">QPixmap::isNull</a>(), <a href="qpixmap.html#load">QPixmap::load</a>(), <a href="qpixmap.html#loadFromData">QPixmap::loadFromData</a>(), <a href="qpixmap.html#save">QPixmap::save</a>(), and <a href="qpixmap.html#imageFormat">QPixmap::imageFormat</a>(). + +<h3 class=fn><a href="qbitmap.html">QBitmap</a> & <a name="operator-eq"></a>QBitmap::operator= ( const <a href="qbitmap.html">QBitmap</a> & bitmap ) +</h3> +Assigns the bitmap <em>bitmap</em> to this bitmap and returns a +reference to this bitmap. + +<h3 class=fn><a href="qbitmap.html">QBitmap</a> & <a name="operator-eq-2"></a>QBitmap::operator= ( const <a href="qpixmap.html">QPixmap</a> & pixmap ) +</h3> +This is an overloaded member function, provided for convenience. It behaves essentially like the above function. +<p> Assigns the pixmap <em>pixmap</em> to this bitmap and returns a +reference to this bitmap. +<p> Dithering will be performed if the pixmap has a <a href="qpixmap.html#depth">QPixmap::depth</a>() +greater than 1. + +<h3 class=fn><a href="qbitmap.html">QBitmap</a> & <a name="operator-eq-3"></a>QBitmap::operator= ( const <a href="qimage.html">QImage</a> & image ) +</h3> +This is an overloaded member function, provided for convenience. It behaves essentially like the above function. +<p> Converts the image <em>image</em> to a bitmap and assigns the result to +this bitmap. Returns a reference to the bitmap. +<p> Dithering will be performed if the image has a <a href="qimage.html#depth">QImage::depth</a>() +greater than 1. + +<h3 class=fn><a href="qbitmap.html">QBitmap</a> <a name="xForm"></a>QBitmap::xForm ( const <a href="qwmatrix.html">QWMatrix</a> & matrix ) const +</h3> +Returns a transformed copy of this bitmap by using <em>matrix</em>. +<p> This function does exactly the same as <a href="qpixmap.html#xForm">QPixmap::xForm</a>(), except +that it returns a QBitmap instead of a <a href="qpixmap.html">QPixmap</a>. +<p> <p>See also <a href="qpixmap.html#xForm">QPixmap::xForm</a>(). + +<!-- eof --> +<hr><p> +This file is part of the <a href="index.html">Qt toolkit</a>. +Copyright © 1995-2007 +<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center> +<table width=100% cellspacing=0 border=0><tr> +<td>Copyright © 2007 +<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> +<td align=right><div align=right>Qt 3.3.8</div> +</table></div></address></body> +</html> |