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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-08 12:31:36 -0600
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-08 12:31:36 -0600
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+<title>TQScreen Class</title>
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+ <a href="index.html">
+<font color="#004faf">Home</font></a>
+ | <a href="classes.html">
+<font color="#004faf">All&nbsp;Classes</font></a>
+ | <a href="mainclasses.html">
+<font color="#004faf">Main&nbsp;Classes</font></a>
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+<font color="#004faf">Functions</font></a>
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+<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQScreen Class Reference</h1>
+
+<p>The TQScreen class and its descendants manage the framebuffer and
+palette.
+<a href="#details">More...</a>
+<p><tt>#include &lt;<a href="qgfx_qws-h.html">qgfx_qws.h</a>&gt;</tt>
+<p><a href="qscreen-members.html">List of all member functions.</a>
+<h2>Public Members</h2>
+<ul>
+<li class=fn><a href="#TQScreen"><b>TQScreen</b></a> ( int&nbsp;display_id )</li>
+<li class=fn>virtual <a href="#~TQScreen"><b>~TQScreen</b></a> ()</li>
+<li class=fn>virtual bool <a href="#initDevice"><b>initDevice</b></a> () = 0</li>
+<li class=fn>virtual bool <a href="#connect"><b>connect</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;displaySpec ) = 0</li>
+<li class=fn>virtual void <a href="#disconnect"><b>disconnect</b></a> () = 0</li>
+<li class=fn>virtual int <a href="#initCursor"><b>initCursor</b></a> ( void&nbsp;*&nbsp;end_of_location, bool&nbsp;init = FALSE )</li>
+<li class=fn>virtual void <a href="#shutdownDevice"><b>shutdownDevice</b></a> ()</li>
+<li class=fn>virtual void <a href="#setMode"><b>setMode</b></a> ( int, int, int ) = 0</li>
+<li class=fn>virtual bool <a href="#supportsDepth"><b>supportsDepth</b></a> ( int&nbsp;d ) const</li>
+<li class=fn>virtual TQGfx * <a href="#createGfx"><b>createGfx</b></a> ( unsigned&nbsp;char&nbsp;*&nbsp;bytes, int&nbsp;w, int&nbsp;h, int&nbsp;d, int&nbsp;linestep )</li>
+<li class=fn>virtual TQGfx * <a href="#screenGfx"><b>screenGfx</b></a> ()</li>
+<li class=fn>virtual void <a href="#save"><b>save</b></a> ()</li>
+<li class=fn>virtual void <a href="#restore"><b>restore</b></a> ()</li>
+<li class=fn>virtual void <a href="#blank"><b>blank</b></a> ( bool&nbsp;on )</li>
+<li class=fn>virtual int <a href="#pixmapOffsetAlignment"><b>pixmapOffsetAlignment</b></a> ()</li>
+<li class=fn>virtual int <a href="#pixmapLinestepAlignment"><b>pixmapLinestepAlignment</b></a> ()</li>
+<li class=fn>virtual bool <a href="#onCard"><b>onCard</b></a> ( unsigned&nbsp;char&nbsp;*&nbsp;p ) const</li>
+<li class=fn>virtual bool <a href="#onCard-2"><b>onCard</b></a> ( unsigned&nbsp;char&nbsp;*&nbsp;p, ulong&nbsp;&amp;&nbsp;offset ) const</li>
+<li class=fn>virtual void <a href="#set"><b>set</b></a> ( unsigned int, unsigned int, unsigned int, unsigned int )</li>
+<li class=fn>virtual int <a href="#alloc"><b>alloc</b></a> ( unsigned&nbsp;int&nbsp;r, unsigned&nbsp;int&nbsp;g, unsigned&nbsp;int&nbsp;b )</li>
+<li class=fn>int <a href="#width"><b>width</b></a> () const</li>
+<li class=fn>int <a href="#height"><b>height</b></a> () const</li>
+<li class=fn>int <a href="#depth"><b>depth</b></a> () const</li>
+<li class=fn>virtual int <a href="#pixmapDepth"><b>pixmapDepth</b></a> () const</li>
+<li class=fn>int <a href="#pixelType"><b>pixelType</b></a> () const</li>
+<li class=fn>int <a href="#linestep"><b>linestep</b></a> () const</li>
+<li class=fn>int <a href="#deviceWidth"><b>deviceWidth</b></a> () const</li>
+<li class=fn>int <a href="#deviceHeight"><b>deviceHeight</b></a> () const</li>
+<li class=fn>uchar * <a href="#base"><b>base</b></a> () const</li>
+<li class=fn>virtual uchar * <a href="#cache"><b>cache</b></a> ( int, int )</li>
+<li class=fn>virtual void <a href="#uncache"><b>uncache</b></a> ( uchar * )</li>
+<li class=fn>int <a href="#screenSize"><b>screenSize</b></a> () const</li>
+<li class=fn>int <a href="#totalSize"><b>totalSize</b></a> () const</li>
+<li class=fn>TQRgb * <a href="#clut"><b>clut</b></a> ()</li>
+<li class=fn>int <a href="#numCols"><b>numCols</b></a> ()</li>
+<li class=fn>virtual TQSize <a href="#mapToDevice"><b>mapToDevice</b></a> ( const&nbsp;TQSize&nbsp;&amp;&nbsp;s ) const</li>
+<li class=fn>virtual TQSize <a href="#mapFromDevice"><b>mapFromDevice</b></a> ( const&nbsp;TQSize&nbsp;&amp;&nbsp;s ) const</li>
+<li class=fn>virtual TQPoint <a href="#mapToDevice-2"><b>mapToDevice</b></a> ( const TQPoint &amp;, const TQSize &amp; ) const</li>
+<li class=fn>virtual TQPoint <a href="#mapFromDevice-2"><b>mapFromDevice</b></a> ( const TQPoint &amp;, const TQSize &amp; ) const</li>
+<li class=fn>virtual TQRect <a href="#mapToDevice-3"><b>mapToDevice</b></a> ( const&nbsp;TQRect&nbsp;&amp;&nbsp;r, const TQSize &amp; ) const</li>
+<li class=fn>virtual TQRect <a href="#mapFromDevice-3"><b>mapFromDevice</b></a> ( const&nbsp;TQRect&nbsp;&amp;&nbsp;r, const TQSize &amp; ) const</li>
+<li class=fn>virtual TQImage <a href="#mapToDevice-4"><b>mapToDevice</b></a> ( const&nbsp;TQImage&nbsp;&amp;&nbsp;i ) const</li>
+<li class=fn>virtual TQImage <a href="#mapFromDevice-4"><b>mapFromDevice</b></a> ( const&nbsp;TQImage&nbsp;&amp;&nbsp;i ) const</li>
+<li class=fn>virtual TQRegion <a href="#mapToDevice-5"><b>mapToDevice</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r, const TQSize &amp; ) const</li>
+<li class=fn>virtual TQRegion <a href="#mapFromDevice-5"><b>mapFromDevice</b></a> ( const&nbsp;TQRegion&nbsp;&amp;&nbsp;r, const TQSize &amp; ) const</li>
+<li class=fn>virtual int <a href="#transformOrientation"><b>transformOrientation</b></a> () const</li>
+<li class=fn>virtual bool <a href="#isTransformed"><b>isTransformed</b></a> () const</li>
+<li class=fn>virtual bool <a href="#isInterlaced"><b>isInterlaced</b></a> () const</li>
+<li class=fn>virtual void <a href="#setDirty"><b>setDirty</b></a> ( const TQRect &amp; )</li>
+<li class=fn>int * <a href="#opType"><b>opType</b></a> ()</li>
+<li class=fn>int * <a href="#lastOp"><b>lastOp</b></a> ()</li>
+</ul>
+<hr><a name="details"></a><h2>Detailed Description</h2>
+
+
+
+The TQScreen class and its descendants manage the framebuffer and
+palette.
+<p> TQScreens act as factories for the screen cursor and TQGfx's. TQLinuxFbScreen
+manages a Linux framebuffer; accelerated drivers subclass TQLinuxFbScreen.
+There can only be one screen in a TQt/Embedded application.
+<p>See also <a href="qws.html">TQt/Embedded</a>.
+
+<hr><h2>Member Function Documentation</h2>
+<h3 class=fn><a name="TQScreen"></a>TQScreen::TQScreen ( int&nbsp;display_id )
+</h3>
+
+Create a screen; the <em>display_id</em> is the number of the TQt/Embedded server
+to connect to.
+
+<h3 class=fn><a name="~TQScreen"></a>TQScreen::~TQScreen ()<tt> [virtual]</tt>
+</h3>
+Destroys a TQScreen
+
+<h3 class=fn>int <a name="alloc"></a>TQScreen::alloc ( unsigned&nbsp;int&nbsp;r, unsigned&nbsp;int&nbsp;g, unsigned&nbsp;int&nbsp;b )<tt> [virtual]</tt>
+</h3>
+Given an RGB value <em>r</em> <em>g</em> <em>b</em>, return an index which is the closest
+match to it in the screen's palette. Used in paletted modes only.
+
+<h3 class=fn>uchar * <a name="base"></a>TQScreen::base () const
+</h3>
+
+Returns a pointer to the start of the framebuffer.
+
+<h3 class=fn>void <a name="blank"></a>TQScreen::blank ( bool&nbsp;on )<tt> [virtual]</tt>
+</h3>
+
+If <em>on</em> is true, blank the screen. Otherwise unblank it.
+
+<h3 class=fn>uchar * <a name="cache"></a>TQScreen::cache ( int, int )<tt> [virtual]</tt>
+</h3>
+
+This function is used to store pixmaps in graphics memory for the
+use of the accelerated drivers. See TQLinuxFbScreen (where the cacheing
+is implemented) for more information.
+
+<h3 class=fn>TQRgb * <a name="clut"></a>TQScreen::clut ()
+</h3>
+
+Returns the screen's color lookup table (color palette). This is only
+valid in paletted modes (8bpp and lower).
+
+<h3 class=fn>bool <a name="connect"></a>TQScreen::connect ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;displaySpec )<tt> [pure virtual]</tt>
+</h3>
+
+This function is called by every TQt/Embedded application on startup.
+It maps in the framebuffer and in the accelerated drivers the graphics
+card control registers. <em>displaySpec</em> has the following syntax:
+<p>
+<tt>[gfx driver][:driver specific options][:display number]</tt>
+<p>
+for example if you want to use the mach64 driver on fb1 as display 2:
+<p>
+<tt>Mach64:/dev/fb1:2</tt>
+<p>
+<em>displaySpec</em> is passed in via the TQWS_DISPLAY environment variable
+or the -display command line parameter.
+
+<h3 class=fn>TQGfx * <a name="createGfx"></a>TQScreen::createGfx ( unsigned&nbsp;char&nbsp;*&nbsp;bytes, int&nbsp;w, int&nbsp;h, int&nbsp;d, int&nbsp;linestep )<tt> [virtual]</tt>
+</h3>
+
+Creates a gfx on an arbitrary buffer <em>bytes</em>, width <em>w</em> and height <em>h</em> in
+pixels, depth <em>d</em> and <em>linestep</em> (length in bytes of each line in the
+buffer). Accelerated drivers can check to see if <em>bytes</em> points into
+graphics memory and create an accelerated Gfx.
+
+<h3 class=fn>int <a name="depth"></a>TQScreen::depth () const
+</h3>
+
+Gives the depth in bits per pixel of the framebuffer. This is the number
+of bits each pixel takes up rather than the number of significant bits,
+so 24bpp and 32bpp express the same range of colors (8 bits of
+red, green and blue)
+
+<h3 class=fn>int <a name="deviceHeight"></a>TQScreen::deviceHeight () const
+</h3>
+
+Gives the full height of the framebuffer device, as opposed to the
+height which TQt/Embedded will actually use. These can differ if the
+display is centered within the framebuffer.
+
+<h3 class=fn>int <a name="deviceWidth"></a>TQScreen::deviceWidth () const
+</h3>
+
+Gives the full width of the framebuffer device, as opposed to the
+width which TQt/Embedded will actually use. These can differ if the
+display is centered within the framebuffer.
+
+<h3 class=fn>void <a name="disconnect"></a>TQScreen::disconnect ()<tt> [pure virtual]</tt>
+</h3>
+
+This function is called by every TQt/Embedded application just
+before exitting; it's normally used to unmap the framebuffer.
+
+<h3 class=fn>int <a name="height"></a>TQScreen::height () const
+</h3>
+
+Gives the height in pixels of the framebuffer.
+
+<h3 class=fn>int <a name="initCursor"></a>TQScreen::initCursor ( void&nbsp;*&nbsp;end_of_location, bool&nbsp;init = FALSE )<tt> [virtual]</tt>
+</h3>
+This is used to initialize the software cursor - <em>end_of_location</em>
+points to the address after the area where the cursor image can be stored.
+<em>init</em> is true for the first application this method is called from
+(the TQt/Embedded server), false otherwise.
+
+<h3 class=fn>bool <a name="initDevice"></a>TQScreen::initDevice ()<tt> [pure virtual]</tt>
+</h3>
+
+This function is called by the TQt/Embedded server when initializing
+the framebuffer. Accelerated drivers use it to set up the graphics card.
+
+<h3 class=fn>bool <a name="isInterlaced"></a>TQScreen::isInterlaced () const<tt> [virtual]</tt>
+</h3>
+
+<p> Returns TRUE if the display is interlaced (for instance a
+television screen); otherwise returns FALSE. If TRUE, drawing is
+altered to look better on such displays.
+
+<h3 class=fn>bool <a name="isTransformed"></a>TQScreen::isTransformed () const<tt> [virtual]</tt>
+</h3>
+
+<p> Returns TRUE if the screen is transformed (for instance, rotated
+90 degrees); otherwise returns FALSE. TQScreen's version always
+returns FALSE.
+
+<h3 class=fn>int * <a name="lastOp"></a>TQScreen::lastOp ()
+</h3>
+
+<p> Returns the screens last operation.
+
+<h3 class=fn>int <a name="linestep"></a>TQScreen::linestep () const
+</h3>
+
+Returns the length in bytes of each scanline of the framebuffer.
+
+<h3 class=fn><a href="qsize.html">TQSize</a> <a name="mapFromDevice"></a>TQScreen::mapFromDevice ( const&nbsp;<a href="qsize.html">TQSize</a>&nbsp;&amp;&nbsp;s ) const<tt> [virtual]</tt>
+</h3>
+
+<p> Map a framebuffer coordinate to the coordinate space used by the
+application. Used by the rotated driver; the TQScreen
+implementation simply returns <em>s</em>.
+
+<h3 class=fn><a href="qpoint.html">TQPoint</a> <a name="mapFromDevice-2"></a>TQScreen::mapFromDevice ( const&nbsp;<a href="qpoint.html">TQPoint</a>&nbsp;&amp;, const&nbsp;<a href="qsize.html">TQSize</a>&nbsp;&amp; ) const<tt> [virtual]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Map a framebuffer coordinate to the coordinate space used by the
+application. Used by the rotated driver; the TQScreen
+implementation simply returns the point.
+
+<h3 class=fn><a href="qrect.html">TQRect</a> <a name="mapFromDevice-3"></a>TQScreen::mapFromDevice ( const&nbsp;<a href="qrect.html">TQRect</a>&nbsp;&amp;&nbsp;r, const&nbsp;<a href="qsize.html">TQSize</a>&nbsp;&amp; ) const<tt> [virtual]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Map a framebuffer coordinate to the coordinate space used by the
+application. Used by the rotated driver; the TQScreen
+implementation simply returns <em>r</em>.
+
+<h3 class=fn><a href="qimage.html">TQImage</a> <a name="mapFromDevice-4"></a>TQScreen::mapFromDevice ( const&nbsp;<a href="qimage.html">TQImage</a>&nbsp;&amp;&nbsp;i ) const<tt> [virtual]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Transforms an image so that it matches the application coordinate
+space (e.g. rotating it 90 degrees counter-clockwise). The TQScreen
+implementation simply returns <em>i</em>.
+
+<h3 class=fn><a href="qregion.html">TQRegion</a> <a name="mapFromDevice-5"></a>TQScreen::mapFromDevice ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r, const&nbsp;<a href="qsize.html">TQSize</a>&nbsp;&amp; ) const<tt> [virtual]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Transforms a region so that it matches the application coordinate
+space (e.g. rotating it 90 degrees counter-clockwise). The TQScreen
+implementation simply returns <em>r</em>.
+
+<h3 class=fn><a href="qsize.html">TQSize</a> <a name="mapToDevice"></a>TQScreen::mapToDevice ( const&nbsp;<a href="qsize.html">TQSize</a>&nbsp;&amp;&nbsp;s ) const<tt> [virtual]</tt>
+</h3>
+
+<p> Map a user coordinate to the one to actually draw. Used by the
+rotated driver; the TQScreen implementation simply returns <em>s</em>.
+
+<h3 class=fn><a href="qpoint.html">TQPoint</a> <a name="mapToDevice-2"></a>TQScreen::mapToDevice ( const&nbsp;<a href="qpoint.html">TQPoint</a>&nbsp;&amp;, const&nbsp;<a href="qsize.html">TQSize</a>&nbsp;&amp; ) const<tt> [virtual]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Map a user coordinate to the one to actually draw. Used by the
+rotated driver; the TQScreen implementation simply returns the
+point passed in.
+
+<h3 class=fn><a href="qrect.html">TQRect</a> <a name="mapToDevice-3"></a>TQScreen::mapToDevice ( const&nbsp;<a href="qrect.html">TQRect</a>&nbsp;&amp;&nbsp;r, const&nbsp;<a href="qsize.html">TQSize</a>&nbsp;&amp; ) const<tt> [virtual]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Map a user coordinate to the one to actually draw. Used by the
+rotated driver; the TQScreen implementation simply returns <em>r</em>.
+
+<h3 class=fn><a href="qimage.html">TQImage</a> <a name="mapToDevice-4"></a>TQScreen::mapToDevice ( const&nbsp;<a href="qimage.html">TQImage</a>&nbsp;&amp;&nbsp;i ) const<tt> [virtual]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Transforms an image so that it fits the device coordinate space
+(e.g. rotating it 90 degrees clockwise). The TQScreen
+implementation simply returns <em>i</em>.
+
+<h3 class=fn><a href="qregion.html">TQRegion</a> <a name="mapToDevice-5"></a>TQScreen::mapToDevice ( const&nbsp;<a href="qregion.html">TQRegion</a>&nbsp;&amp;&nbsp;r, const&nbsp;<a href="qsize.html">TQSize</a>&nbsp;&amp; ) const<tt> [virtual]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Transforms a region so that it fits the device coordinate space
+(e.g. rotating it 90 degrees clockwise). The TQScreen
+implementation simply returns <em>r</em>.
+
+<h3 class=fn>int <a name="numCols"></a>TQScreen::numCols ()
+</h3>
+
+Returns the number of entries in the color table returned by <a href="#clut">clut</a>().
+
+<h3 class=fn>bool <a name="onCard"></a>TQScreen::onCard ( unsigned&nbsp;char&nbsp;*&nbsp;p ) const<tt> [virtual]</tt>
+</h3>
+
+Returns true if the buffer pointed to by <em>p</em> is within graphics card
+memory, false if it's in main RAM.
+
+<h3 class=fn>bool <a name="onCard-2"></a>TQScreen::onCard ( unsigned&nbsp;char&nbsp;*&nbsp;p, ulong&nbsp;&amp;&nbsp;offset ) const<tt> [virtual]</tt>
+</h3>
+
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> This checks whether the buffer specified by <em>p</em> is on the card
+(as per the other version of onCard) and returns an offset in bytes
+from the start of graphics card memory in <em>offset</em> if it is.
+
+<h3 class=fn>int * <a name="opType"></a>TQScreen::opType ()
+</h3>
+
+<p> Returns the screen's operation type.
+
+<h3 class=fn>int <a name="pixelType"></a>TQScreen::pixelType () const
+</h3>
+
+Returns an integer (taking the same values as TQGfx::PixelType)
+that specifies the pixel storage format of the screen.
+
+<h3 class=fn>int <a name="pixmapDepth"></a>TQScreen::pixmapDepth () const<tt> [virtual]</tt>
+</h3>
+
+Gives the preferred depth for pixmaps. By default this is the same
+as the screen depth, but for the VGA16 driver it's 8bpp.
+
+<h3 class=fn>int <a name="pixmapLinestepAlignment"></a>TQScreen::pixmapLinestepAlignment ()<tt> [virtual]</tt>
+</h3>
+
+Returns the value in bits to which individual scanlines of pixmaps held in
+graphics card memory should be aligned. This is only useful for accelerated
+drivers. By default the value returned is 64 but it can be overridden
+by individual accelerated drivers.
+
+<h3 class=fn>int <a name="pixmapOffsetAlignment"></a>TQScreen::pixmapOffsetAlignment ()<tt> [virtual]</tt>
+</h3>
+
+Returns the value in bits to which the start address of pixmaps held in
+graphics card memory should be aligned. This is only useful for accelerated
+drivers. By default the value returned is 64 but it can be overridden
+by individual accelerated drivers.
+
+<h3 class=fn>void <a name="restore"></a>TQScreen::restore ()<tt> [virtual]</tt>
+</h3>
+Restores the state of the graphics card from a previous <a href="#save">save</a>()
+
+<h3 class=fn>void <a name="save"></a>TQScreen::save ()<tt> [virtual]</tt>
+</h3>
+Saves the state of the graphics card - used so that, for instance,
+the palette can be restored when switching between linux virtual
+consoles. Hardware TQScreen descendants should save register state
+here if necessary if switching between virtual consoles (for
+example to/from X) is to be permitted.
+
+<h3 class=fn>TQGfx * <a name="screenGfx"></a>TQScreen::screenGfx ()<tt> [virtual]</tt>
+</h3>
+Returns a TQGfx (normally a TQGfxRaster) initialized to point to the screen,
+with an origin at 0,0 and a clip region covering the whole screen.
+
+<h3 class=fn>int <a name="screenSize"></a>TQScreen::screenSize () const
+</h3>
+
+Returns the size in bytes of the screen. This is always located at
+the beginning of framebuffer memory (i.e. at <a href="#base">base</a>()).
+
+<h3 class=fn>void <a name="set"></a>TQScreen::set ( unsigned int, unsigned int, unsigned int, unsigned int )<tt> [virtual]</tt>
+</h3>
+Sets an entry in the color palette.
+
+<h3 class=fn>void <a name="setDirty"></a>TQScreen::setDirty ( const&nbsp;<a href="qrect.html">TQRect</a>&nbsp;&amp; )<tt> [virtual]</tt>
+</h3>
+
+<p> Indicates which section of the screen has been altered. Used by
+the VNC and VFB displays; the TQScreen version does nothing.
+
+<h3 class=fn>void <a name="setMode"></a>TQScreen::setMode ( int, int, int )<tt> [pure virtual]</tt>
+</h3>
+
+This function can be used to set the framebuffer width, height and
+depth. It's currently unused.
+
+<h3 class=fn>void <a name="shutdownDevice"></a>TQScreen::shutdownDevice ()<tt> [virtual]</tt>
+</h3>
+Called by the TQt/Embedded server on shutdown; never called by
+a TQt/Embedded client. This is intended to support graphics card specific
+shutdown; the unaccelerated implementation simply hides the mouse cursor.
+
+<h3 class=fn>bool <a name="supportsDepth"></a>TQScreen::supportsDepth ( int&nbsp;d ) const<tt> [virtual]</tt>
+</h3>
+
+Returns true if the screen supports a particular color depth <em>d</em>.
+Possible values are 1,4,8,16 and 32.
+
+<h3 class=fn>int <a name="totalSize"></a>TQScreen::totalSize () const
+</h3>
+
+Returns the size in bytes of available graphics card memory, including the
+screen. Offscreen memory is only used by the accelerated drivers.
+
+<h3 class=fn>int <a name="transformOrientation"></a>TQScreen::transformOrientation () const<tt> [virtual]</tt>
+</h3>
+
+<p> Used by the rotated server. The TQScreeen implementation returns 0.
+
+<h3 class=fn>void <a name="uncache"></a>TQScreen::uncache ( uchar * )<tt> [virtual]</tt>
+</h3>
+
+This function is called on pixmap destruction to remove them from
+graphics card memory.
+
+<h3 class=fn>int <a name="width"></a>TQScreen::width () const
+</h3>
+
+Gives the width in pixels of the framebuffer.
+
+<!-- eof -->
+<hr><p>
+This file is part of the <a href="index.html">TQt toolkit</a>.
+Copyright &copy; 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 &copy; 2007
+<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
+<td align=right><div align=right>TQt 3.3.8</div>
+</table></div></address></body>
+</html>