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| 24 | <font color="#004faf">Main Classes</font></a>
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| 26 | <font color="#004faf">Annotated</font></a>
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| 28 | <font color="#004faf">Grouped Classes</font></a>
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| 30 | <font color="#004faf">Functions</font></a>
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| 31 | </td>
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| 32 | <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QScreen Class Reference</h1>
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| 33 |
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| 34 | <p>The QScreen class and its descendants manage the framebuffer and
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| 35 | palette.
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| 36 | <a href="#details">More...</a>
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| 37 | <p><tt>#include <<a href="qgfx_qws-h.html">qgfx_qws.h</a>></tt>
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| 38 | <p><a href="qscreen-members.html">List of all member functions.</a>
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| 39 | <h2>Public Members</h2>
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| 40 | <ul>
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| 41 | <li class=fn><a href="#QScreen"><b>QScreen</b></a> ( int display_id )</li>
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| 42 | <li class=fn>virtual <a href="#~QScreen"><b>~QScreen</b></a> ()</li>
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| 43 | <li class=fn>virtual bool <a href="#initDevice"><b>initDevice</b></a> () = 0</li>
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| 44 | <li class=fn>virtual bool <a href="#connect"><b>connect</b></a> ( const QString & displaySpec ) = 0</li>
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| 45 | <li class=fn>virtual void <a href="#disconnect"><b>disconnect</b></a> () = 0</li>
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| 46 | <li class=fn>virtual int <a href="#initCursor"><b>initCursor</b></a> ( void * end_of_location, bool init = FALSE )</li>
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| 47 | <li class=fn>virtual void <a href="#shutdownDevice"><b>shutdownDevice</b></a> ()</li>
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| 48 | <li class=fn>virtual void <a href="#setMode"><b>setMode</b></a> ( int, int, int ) = 0</li>
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| 49 | <li class=fn>virtual bool <a href="#supportsDepth"><b>supportsDepth</b></a> ( int d ) const</li>
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| 50 | <li class=fn>virtual QGfx * <a href="#createGfx"><b>createGfx</b></a> ( unsigned char * bytes, int w, int h, int d, int linestep )</li>
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| 51 | <li class=fn>virtual QGfx * <a href="#screenGfx"><b>screenGfx</b></a> ()</li>
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| 52 | <li class=fn>virtual void <a href="#save"><b>save</b></a> ()</li>
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| 53 | <li class=fn>virtual void <a href="#restore"><b>restore</b></a> ()</li>
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| 54 | <li class=fn>virtual void <a href="#blank"><b>blank</b></a> ( bool on )</li>
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| 55 | <li class=fn>virtual int <a href="#pixmapOffsetAlignment"><b>pixmapOffsetAlignment</b></a> ()</li>
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| 56 | <li class=fn>virtual int <a href="#pixmapLinestepAlignment"><b>pixmapLinestepAlignment</b></a> ()</li>
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| 57 | <li class=fn>virtual bool <a href="#onCard"><b>onCard</b></a> ( unsigned char * p ) const</li>
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| 58 | <li class=fn>virtual bool <a href="#onCard-2"><b>onCard</b></a> ( unsigned char * p, ulong & offset ) const</li>
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| 59 | <li class=fn>virtual void <a href="#set"><b>set</b></a> ( unsigned int, unsigned int, unsigned int, unsigned int )</li>
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| 60 | <li class=fn>virtual int <a href="#alloc"><b>alloc</b></a> ( unsigned int r, unsigned int g, unsigned int b )</li>
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| 61 | <li class=fn>int <a href="#width"><b>width</b></a> () const</li>
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| 62 | <li class=fn>int <a href="#height"><b>height</b></a> () const</li>
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| 63 | <li class=fn>int <a href="#depth"><b>depth</b></a> () const</li>
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| 64 | <li class=fn>virtual int <a href="#pixmapDepth"><b>pixmapDepth</b></a> () const</li>
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| 65 | <li class=fn>int <a href="#pixelType"><b>pixelType</b></a> () const</li>
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| 66 | <li class=fn>int <a href="#linestep"><b>linestep</b></a> () const</li>
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| 67 | <li class=fn>int <a href="#deviceWidth"><b>deviceWidth</b></a> () const</li>
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| 68 | <li class=fn>int <a href="#deviceHeight"><b>deviceHeight</b></a> () const</li>
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| 69 | <li class=fn>uchar * <a href="#base"><b>base</b></a> () const</li>
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| 70 | <li class=fn>virtual uchar * <a href="#cache"><b>cache</b></a> ( int, int )</li>
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| 71 | <li class=fn>virtual void <a href="#uncache"><b>uncache</b></a> ( uchar * )</li>
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| 72 | <li class=fn>int <a href="#screenSize"><b>screenSize</b></a> () const</li>
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| 73 | <li class=fn>int <a href="#totalSize"><b>totalSize</b></a> () const</li>
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| 74 | <li class=fn>QRgb * <a href="#clut"><b>clut</b></a> ()</li>
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| 75 | <li class=fn>int <a href="#numCols"><b>numCols</b></a> ()</li>
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| 76 | <li class=fn>virtual QSize <a href="#mapToDevice"><b>mapToDevice</b></a> ( const QSize & s ) const</li>
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| 77 | <li class=fn>virtual QSize <a href="#mapFromDevice"><b>mapFromDevice</b></a> ( const QSize & s ) const</li>
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| 78 | <li class=fn>virtual QPoint <a href="#mapToDevice-2"><b>mapToDevice</b></a> ( const QPoint &, const QSize & ) const</li>
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| 79 | <li class=fn>virtual QPoint <a href="#mapFromDevice-2"><b>mapFromDevice</b></a> ( const QPoint &, const QSize & ) const</li>
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| 80 | <li class=fn>virtual QRect <a href="#mapToDevice-3"><b>mapToDevice</b></a> ( const QRect & r, const QSize & ) const</li>
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| 81 | <li class=fn>virtual QRect <a href="#mapFromDevice-3"><b>mapFromDevice</b></a> ( const QRect & r, const QSize & ) const</li>
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| 82 | <li class=fn>virtual QImage <a href="#mapToDevice-4"><b>mapToDevice</b></a> ( const QImage & i ) const</li>
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| 83 | <li class=fn>virtual QImage <a href="#mapFromDevice-4"><b>mapFromDevice</b></a> ( const QImage & i ) const</li>
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| 84 | <li class=fn>virtual QRegion <a href="#mapToDevice-5"><b>mapToDevice</b></a> ( const QRegion & r, const QSize & ) const</li>
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| 85 | <li class=fn>virtual QRegion <a href="#mapFromDevice-5"><b>mapFromDevice</b></a> ( const QRegion & r, const QSize & ) const</li>
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| 86 | <li class=fn>virtual int <a href="#transformOrientation"><b>transformOrientation</b></a> () const</li>
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| 87 | <li class=fn>virtual bool <a href="#isTransformed"><b>isTransformed</b></a> () const</li>
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| 88 | <li class=fn>virtual bool <a href="#isInterlaced"><b>isInterlaced</b></a> () const</li>
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| 89 | <li class=fn>virtual void <a href="#setDirty"><b>setDirty</b></a> ( const QRect & )</li>
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| 90 | <li class=fn>int * <a href="#opType"><b>opType</b></a> ()</li>
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| 91 | <li class=fn>int * <a href="#lastOp"><b>lastOp</b></a> ()</li>
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| 92 | </ul>
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| 93 | <hr><a name="details"></a><h2>Detailed Description</h2>
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| 94 |
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| 95 |
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| 96 |
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| 97 | The QScreen class and its descendants manage the framebuffer and
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| 98 | palette.
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| 99 | <p> QScreens act as factories for the screen cursor and QGfx's. QLinuxFbScreen
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| 100 | manages a Linux framebuffer; accelerated drivers subclass QLinuxFbScreen.
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| 101 | There can only be one screen in a Qt/Embedded application.
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| 102 | <p>See also <a href="qws.html">Qt/Embedded</a>.
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| 103 |
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| 104 | <hr><h2>Member Function Documentation</h2>
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| 105 | <h3 class=fn><a name="QScreen"></a>QScreen::QScreen ( int display_id )
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| 106 | </h3>
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| 107 |
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| 108 | Create a screen; the <em>display_id</em> is the number of the Qt/Embedded server
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| 109 | to connect to.
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| 110 |
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| 111 | <h3 class=fn><a name="~QScreen"></a>QScreen::~QScreen ()<tt> [virtual]</tt>
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| 112 | </h3>
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| 113 | Destroys a QScreen
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| 114 |
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| 115 | <h3 class=fn>int <a name="alloc"></a>QScreen::alloc ( unsigned int r, unsigned int g, unsigned int b )<tt> [virtual]</tt>
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| 116 | </h3>
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| 117 | Given an RGB value <em>r</em> <em>g</em> <em>b</em>, return an index which is the closest
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| 118 | match to it in the screen's palette. Used in paletted modes only.
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| 119 |
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| 120 | <h3 class=fn>uchar * <a name="base"></a>QScreen::base () const
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| 121 | </h3>
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| 122 |
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| 123 | Returns a pointer to the start of the framebuffer.
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| 124 |
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| 125 | <h3 class=fn>void <a name="blank"></a>QScreen::blank ( bool on )<tt> [virtual]</tt>
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| 126 | </h3>
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| 127 |
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| 128 | If <em>on</em> is true, blank the screen. Otherwise unblank it.
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| 129 |
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| 130 | <h3 class=fn>uchar * <a name="cache"></a>QScreen::cache ( int, int )<tt> [virtual]</tt>
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| 131 | </h3>
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| 132 |
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| 133 | This function is used to store pixmaps in graphics memory for the
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| 134 | use of the accelerated drivers. See QLinuxFbScreen (where the cacheing
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| 135 | is implemented) for more information.
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| 136 |
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| 137 | <h3 class=fn>QRgb * <a name="clut"></a>QScreen::clut ()
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| 138 | </h3>
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| 139 |
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| 140 | Returns the screen's color lookup table (color palette). This is only
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| 141 | valid in paletted modes (8bpp and lower).
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| 142 |
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| 143 | <h3 class=fn>bool <a name="connect"></a>QScreen::connect ( const <a href="qstring.html">QString</a> & displaySpec )<tt> [pure virtual]</tt>
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| 144 | </h3>
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| 145 |
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| 146 | This function is called by every Qt/Embedded application on startup.
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| 147 | It maps in the framebuffer and in the accelerated drivers the graphics
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| 148 | card control registers. <em>displaySpec</em> has the following syntax:
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| 149 | <p>
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| 150 | <tt>[gfx driver][:driver specific options][:display number]</tt>
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| 151 | <p>
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| 152 | for example if you want to use the mach64 driver on fb1 as display 2:
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| 153 | <p>
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| 154 | <tt>Mach64:/dev/fb1:2</tt>
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| 155 | <p>
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| 156 | <em>displaySpec</em> is passed in via the QWS_DISPLAY environment variable
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| 157 | or the -display command line parameter.
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| 158 |
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| 159 | <h3 class=fn>QGfx * <a name="createGfx"></a>QScreen::createGfx ( unsigned char * bytes, int w, int h, int d, int linestep )<tt> [virtual]</tt>
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| 160 | </h3>
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| 161 |
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| 162 | Creates a gfx on an arbitrary buffer <em>bytes</em>, width <em>w</em> and height <em>h</em> in
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| 163 | pixels, depth <em>d</em> and <em>linestep</em> (length in bytes of each line in the
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| 164 | buffer). Accelerated drivers can check to see if <em>bytes</em> points into
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| 165 | graphics memory and create an accelerated Gfx.
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| 166 |
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| 167 | <h3 class=fn>int <a name="depth"></a>QScreen::depth () const
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| 168 | </h3>
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| 169 |
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| 170 | Gives the depth in bits per pixel of the framebuffer. This is the number
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| 171 | of bits each pixel takes up rather than the number of significant bits,
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| 172 | so 24bpp and 32bpp express the same range of colors (8 bits of
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| 173 | red, green and blue)
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| 174 |
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| 175 | <h3 class=fn>int <a name="deviceHeight"></a>QScreen::deviceHeight () const
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| 176 | </h3>
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| 177 |
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| 178 | Gives the full height of the framebuffer device, as opposed to the
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| 179 | height which Qt/Embedded will actually use. These can differ if the
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| 180 | display is centered within the framebuffer.
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| 181 |
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| 182 | <h3 class=fn>int <a name="deviceWidth"></a>QScreen::deviceWidth () const
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| 183 | </h3>
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| 184 |
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| 185 | Gives the full width of the framebuffer device, as opposed to the
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| 186 | width which Qt/Embedded will actually use. These can differ if the
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| 187 | display is centered within the framebuffer.
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| 188 |
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| 189 | <h3 class=fn>void <a name="disconnect"></a>QScreen::disconnect ()<tt> [pure virtual]</tt>
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| 190 | </h3>
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| 191 |
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| 192 | This function is called by every Qt/Embedded application just
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| 193 | before exitting; it's normally used to unmap the framebuffer.
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| 194 |
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| 195 | <h3 class=fn>int <a name="height"></a>QScreen::height () const
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| 196 | </h3>
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| 197 |
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| 198 | Gives the height in pixels of the framebuffer.
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| 199 |
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| 200 | <h3 class=fn>int <a name="initCursor"></a>QScreen::initCursor ( void * end_of_location, bool init = FALSE )<tt> [virtual]</tt>
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| 201 | </h3>
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| 202 | This is used to initialize the software cursor - <em>end_of_location</em>
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| 203 | points to the address after the area where the cursor image can be stored.
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| 204 | <em>init</em> is true for the first application this method is called from
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| 205 | (the Qt/Embedded server), false otherwise.
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| 206 |
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| 207 | <h3 class=fn>bool <a name="initDevice"></a>QScreen::initDevice ()<tt> [pure virtual]</tt>
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| 208 | </h3>
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| 209 |
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| 210 | This function is called by the Qt/Embedded server when initializing
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| 211 | the framebuffer. Accelerated drivers use it to set up the graphics card.
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| 212 |
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| 213 | <h3 class=fn>bool <a name="isInterlaced"></a>QScreen::isInterlaced () const<tt> [virtual]</tt>
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| 214 | </h3>
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| 215 |
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| 216 | <p> Returns TRUE if the display is interlaced (for instance a
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| 217 | television screen); otherwise returns FALSE. If TRUE, drawing is
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| 218 | altered to look better on such displays.
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| 219 |
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| 220 | <h3 class=fn>bool <a name="isTransformed"></a>QScreen::isTransformed () const<tt> [virtual]</tt>
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| 221 | </h3>
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| 222 |
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| 223 | <p> Returns TRUE if the screen is transformed (for instance, rotated
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| 224 | 90 degrees); otherwise returns FALSE. QScreen's version always
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| 225 | returns FALSE.
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| 226 |
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| 227 | <h3 class=fn>int * <a name="lastOp"></a>QScreen::lastOp ()
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| 228 | </h3>
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| 229 |
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| 230 | <p> Returns the screens last operation.
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| 231 |
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| 232 | <h3 class=fn>int <a name="linestep"></a>QScreen::linestep () const
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| 233 | </h3>
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| 234 |
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| 235 | Returns the length in bytes of each scanline of the framebuffer.
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| 236 |
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| 237 | <h3 class=fn><a href="qsize.html">QSize</a> <a name="mapFromDevice"></a>QScreen::mapFromDevice ( const <a href="qsize.html">QSize</a> & s ) const<tt> [virtual]</tt>
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| 238 | </h3>
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| 239 |
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| 240 | <p> Map a framebuffer coordinate to the coordinate space used by the
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| 241 | application. Used by the rotated driver; the QScreen
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| 242 | implementation simply returns <em>s</em>.
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| 243 |
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| 244 | <h3 class=fn><a href="qpoint.html">QPoint</a> <a name="mapFromDevice-2"></a>QScreen::mapFromDevice ( const <a href="qpoint.html">QPoint</a> &, const <a href="qsize.html">QSize</a> & ) const<tt> [virtual]</tt>
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| 245 | </h3>
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| 246 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 247 | <p> Map a framebuffer coordinate to the coordinate space used by the
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| 248 | application. Used by the rotated driver; the QScreen
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| 249 | implementation simply returns the point.
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| 250 |
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| 251 | <h3 class=fn><a href="qrect.html">QRect</a> <a name="mapFromDevice-3"></a>QScreen::mapFromDevice ( const <a href="qrect.html">QRect</a> & r, const <a href="qsize.html">QSize</a> & ) const<tt> [virtual]</tt>
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| 252 | </h3>
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| 253 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 254 | <p> Map a framebuffer coordinate to the coordinate space used by the
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| 255 | application. Used by the rotated driver; the QScreen
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| 256 | implementation simply returns <em>r</em>.
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| 257 |
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| 258 | <h3 class=fn><a href="qimage.html">QImage</a> <a name="mapFromDevice-4"></a>QScreen::mapFromDevice ( const <a href="qimage.html">QImage</a> & i ) const<tt> [virtual]</tt>
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| 259 | </h3>
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| 260 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 261 | <p> Transforms an image so that it matches the application coordinate
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| 262 | space (e.g. rotating it 90 degrees counter-clockwise). The QScreen
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| 263 | implementation simply returns <em>i</em>.
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| 264 |
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| 265 | <h3 class=fn><a href="qregion.html">QRegion</a> <a name="mapFromDevice-5"></a>QScreen::mapFromDevice ( const <a href="qregion.html">QRegion</a> & r, const <a href="qsize.html">QSize</a> & ) const<tt> [virtual]</tt>
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| 266 | </h3>
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| 267 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 268 | <p> Transforms a region so that it matches the application coordinate
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| 269 | space (e.g. rotating it 90 degrees counter-clockwise). The QScreen
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| 270 | implementation simply returns <em>r</em>.
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| 271 |
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| 272 | <h3 class=fn><a href="qsize.html">QSize</a> <a name="mapToDevice"></a>QScreen::mapToDevice ( const <a href="qsize.html">QSize</a> & s ) const<tt> [virtual]</tt>
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| 273 | </h3>
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| 274 |
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| 275 | <p> Map a user coordinate to the one to actually draw. Used by the
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| 276 | rotated driver; the QScreen implementation simply returns <em>s</em>.
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| 277 |
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| 278 | <h3 class=fn><a href="qpoint.html">QPoint</a> <a name="mapToDevice-2"></a>QScreen::mapToDevice ( const <a href="qpoint.html">QPoint</a> &, const <a href="qsize.html">QSize</a> & ) const<tt> [virtual]</tt>
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| 279 | </h3>
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| 280 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 281 | <p> Map a user coordinate to the one to actually draw. Used by the
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| 282 | rotated driver; the QScreen implementation simply returns the
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| 283 | point passed in.
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| 284 |
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| 285 | <h3 class=fn><a href="qrect.html">QRect</a> <a name="mapToDevice-3"></a>QScreen::mapToDevice ( const <a href="qrect.html">QRect</a> & r, const <a href="qsize.html">QSize</a> & ) const<tt> [virtual]</tt>
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| 286 | </h3>
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| 287 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
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| 288 | <p> Map a user coordinate to the one to actually draw. Used by the
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| 289 | rotated driver; the QScreen implementation simply returns <em>r</em>.
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| 290 |
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| 291 | <h3 class=fn><a href="qimage.html">QImage</a> <a name="mapToDevice-4"></a>QScreen::mapToDevice ( const <a href="qimage.html">QImage</a> & i ) const<tt> [virtual]</tt>
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| 292 | </h3>
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| 293 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 294 | <p> Transforms an image so that it fits the device coordinate space
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| 295 | (e.g. rotating it 90 degrees clockwise). The QScreen
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| 296 | implementation simply returns <em>i</em>.
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| 297 |
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| 298 | <h3 class=fn><a href="qregion.html">QRegion</a> <a name="mapToDevice-5"></a>QScreen::mapToDevice ( const <a href="qregion.html">QRegion</a> & r, const <a href="qsize.html">QSize</a> & ) const<tt> [virtual]</tt>
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| 299 | </h3>
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| 300 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 301 | <p> Transforms a region so that it fits the device coordinate space
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| 302 | (e.g. rotating it 90 degrees clockwise). The QScreen
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| 303 | implementation simply returns <em>r</em>.
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| 304 |
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| 305 | <h3 class=fn>int <a name="numCols"></a>QScreen::numCols ()
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| 306 | </h3>
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| 307 |
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| 308 | Returns the number of entries in the color table returned by <a href="#clut">clut</a>().
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| 309 |
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| 310 | <h3 class=fn>bool <a name="onCard"></a>QScreen::onCard ( unsigned char * p ) const<tt> [virtual]</tt>
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| 311 | </h3>
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| 312 |
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| 313 | Returns true if the buffer pointed to by <em>p</em> is within graphics card
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| 314 | memory, false if it's in main RAM.
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| 315 |
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| 316 | <h3 class=fn>bool <a name="onCard-2"></a>QScreen::onCard ( unsigned char * p, ulong & offset ) const<tt> [virtual]</tt>
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| 317 | </h3>
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| 318 |
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| 319 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 320 | <p> This checks whether the buffer specified by <em>p</em> is on the card
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| 321 | (as per the other version of onCard) and returns an offset in bytes
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| 322 | from the start of graphics card memory in <em>offset</em> if it is.
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| 323 |
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| 324 | <h3 class=fn>int * <a name="opType"></a>QScreen::opType ()
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| 325 | </h3>
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| 326 |
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| 327 | <p> Returns the screen's operation type.
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| 328 |
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| 329 | <h3 class=fn>int <a name="pixelType"></a>QScreen::pixelType () const
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| 330 | </h3>
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| 331 |
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| 332 | Returns an integer (taking the same values as QGfx::PixelType)
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| 333 | that specifies the pixel storage format of the screen.
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| 334 |
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| 335 | <h3 class=fn>int <a name="pixmapDepth"></a>QScreen::pixmapDepth () const<tt> [virtual]</tt>
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| 336 | </h3>
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| 337 |
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| 338 | Gives the preferred depth for pixmaps. By default this is the same
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| 339 | as the screen depth, but for the VGA16 driver it's 8bpp.
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| 340 |
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| 341 | <h3 class=fn>int <a name="pixmapLinestepAlignment"></a>QScreen::pixmapLinestepAlignment ()<tt> [virtual]</tt>
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| 342 | </h3>
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| 343 |
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| 344 | Returns the value in bits to which individual scanlines of pixmaps held in
|
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| 345 | graphics card memory should be aligned. This is only useful for accelerated
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| 346 | drivers. By default the value returned is 64 but it can be overridden
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| 347 | by individual accelerated drivers.
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| 348 |
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| 349 | <h3 class=fn>int <a name="pixmapOffsetAlignment"></a>QScreen::pixmapOffsetAlignment ()<tt> [virtual]</tt>
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| 350 | </h3>
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| 351 |
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| 352 | Returns the value in bits to which the start address of pixmaps held in
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| 353 | graphics card memory should be aligned. This is only useful for accelerated
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| 354 | drivers. By default the value returned is 64 but it can be overridden
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| 355 | by individual accelerated drivers.
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| 356 |
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| 357 | <h3 class=fn>void <a name="restore"></a>QScreen::restore ()<tt> [virtual]</tt>
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| 358 | </h3>
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| 359 | Restores the state of the graphics card from a previous <a href="#save">save</a>()
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| 360 |
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| 361 | <h3 class=fn>void <a name="save"></a>QScreen::save ()<tt> [virtual]</tt>
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| 362 | </h3>
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| 363 | Saves the state of the graphics card - used so that, for instance,
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| 364 | the palette can be restored when switching between linux virtual
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| 365 | consoles. Hardware QScreen descendants should save register state
|
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| 366 | here if necessary if switching between virtual consoles (for
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| 367 | example to/from X) is to be permitted.
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| 368 |
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| 369 | <h3 class=fn>QGfx * <a name="screenGfx"></a>QScreen::screenGfx ()<tt> [virtual]</tt>
|
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| 370 | </h3>
|
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| 371 | Returns a QGfx (normally a QGfxRaster) initialized to point to the screen,
|
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| 372 | with an origin at 0,0 and a clip region covering the whole screen.
|
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| 373 |
|
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| 374 | <h3 class=fn>int <a name="screenSize"></a>QScreen::screenSize () const
|
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| 375 | </h3>
|
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| 376 |
|
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| 377 | Returns the size in bytes of the screen. This is always located at
|
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| 378 | the beginning of framebuffer memory (i.e. at <a href="#base">base</a>()).
|
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| 379 |
|
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| 380 | <h3 class=fn>void <a name="set"></a>QScreen::set ( unsigned int, unsigned int, unsigned int, unsigned int )<tt> [virtual]</tt>
|
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| 381 | </h3>
|
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| 382 | Sets an entry in the color palette.
|
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| 383 |
|
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| 384 | <h3 class=fn>void <a name="setDirty"></a>QScreen::setDirty ( const <a href="qrect.html">QRect</a> & )<tt> [virtual]</tt>
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| 385 | </h3>
|
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| 386 |
|
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| 387 | <p> Indicates which section of the screen has been altered. Used by
|
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| 388 | the VNC and VFB displays; the QScreen version does nothing.
|
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| 389 |
|
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| 390 | <h3 class=fn>void <a name="setMode"></a>QScreen::setMode ( int, int, int )<tt> [pure virtual]</tt>
|
|---|
| 391 | </h3>
|
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| 392 |
|
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| 393 | This function can be used to set the framebuffer width, height and
|
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| 394 | depth. It's currently unused.
|
|---|
| 395 |
|
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| 396 | <h3 class=fn>void <a name="shutdownDevice"></a>QScreen::shutdownDevice ()<tt> [virtual]</tt>
|
|---|
| 397 | </h3>
|
|---|
| 398 | Called by the Qt/Embedded server on shutdown; never called by
|
|---|
| 399 | a Qt/Embedded client. This is intended to support graphics card specific
|
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| 400 | shutdown; the unaccelerated implementation simply hides the mouse cursor.
|
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| 401 |
|
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| 402 | <h3 class=fn>bool <a name="supportsDepth"></a>QScreen::supportsDepth ( int d ) const<tt> [virtual]</tt>
|
|---|
| 403 | </h3>
|
|---|
| 404 |
|
|---|
| 405 | Returns true if the screen supports a particular color depth <em>d</em>.
|
|---|
| 406 | Possible values are 1,4,8,16 and 32.
|
|---|
| 407 |
|
|---|
| 408 | <h3 class=fn>int <a name="totalSize"></a>QScreen::totalSize () const
|
|---|
| 409 | </h3>
|
|---|
| 410 |
|
|---|
| 411 | Returns the size in bytes of available graphics card memory, including the
|
|---|
| 412 | screen. Offscreen memory is only used by the accelerated drivers.
|
|---|
| 413 |
|
|---|
| 414 | <h3 class=fn>int <a name="transformOrientation"></a>QScreen::transformOrientation () const<tt> [virtual]</tt>
|
|---|
| 415 | </h3>
|
|---|
| 416 |
|
|---|
| 417 | <p> Used by the rotated server. The QScreeen implementation returns 0.
|
|---|
| 418 |
|
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| 419 | <h3 class=fn>void <a name="uncache"></a>QScreen::uncache ( uchar * )<tt> [virtual]</tt>
|
|---|
| 420 | </h3>
|
|---|
| 421 |
|
|---|
| 422 | This function is called on pixmap destruction to remove them from
|
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| 423 | graphics card memory.
|
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| 424 |
|
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| 425 | <h3 class=fn>int <a name="width"></a>QScreen::width () const
|
|---|
| 426 | </h3>
|
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| 427 |
|
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| 428 | Gives the width in pixels of the framebuffer.
|
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| 429 |
|
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| 430 | <!-- eof -->
|
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| 431 | <hr><p>
|
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| 432 | This file is part of the <a href="index.html">Qt toolkit</a>.
|
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| 433 | Copyright © 1995-2007
|
|---|
| 434 | <a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
|
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| 435 | <table width=100% cellspacing=0 border=0><tr>
|
|---|
| 436 | <td>Copyright © 2007
|
|---|
| 437 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
|---|
| 438 | <td align=right><div align=right>Qt 3.3.8</div>
|
|---|
| 439 | </table></div></address></body>
|
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| 440 | </html>
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