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qt3/src/kernel/qpaintdevice_x11.cpp

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/****************************************************************************
**
** Implementation of QPaintDevice class for X11
**
** Created : 940721
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.QPL
** included in the packaging of this file. Licensees holding valid Qt
** Commercial licenses may use this file in accordance with the Qt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
#include "qpaintdevice.h"
#include "qpaintdevicemetrics.h"
#include "qpainter.h"
#include "qwidget.h"
#include "qbitmap.h"
#include "qapplication.h"
#include "qt_x11_p.h"
/*!
\class QPaintDevice qpaintdevice.h
\brief The QPaintDevice class is the base class of objects that
can be painted.
\ingroup graphics
\ingroup images
A paint device is an abstraction of a two-dimensional space that
can be drawn using a QPainter. The drawing capabilities are
implemented by the subclasses QWidget, QPixmap, QPicture and
QPrinter.
The default coordinate system of a paint device has its origin
located at the top-left position. X increases to the right and Y
increases downward. The unit is one pixel. There are several ways
to set up a user-defined coordinate system using the painter, for
example, using QPainter::setWorldMatrix().
Example (draw on a paint device):
\code
void MyWidget::paintEvent( QPaintEvent * )
{
QPainter p; // our painter
p.begin( this ); // start painting the widget
p.setPen( red ); // red outline
p.setBrush( yellow ); // yellow fill
p.drawEllipse( 10, 20, 100,100 ); // 100x100 ellipse at position (10, 20)
p.end(); // painting done
}
\endcode
The bit block transfer is an extremely useful operation for
copying pixels from one paint device to another (or to itself). It
is implemented as the global function bitBlt().
Example (scroll widget contents 10 pixels to the right):
\code
bitBlt( myWidget, 10, 0, myWidget );
\endcode
\warning Qt requires that a QApplication object exists before
any paint devices can be created. Paint devices access window
system resources, and these resources are not initialized before
an application object is created.
*/
//
// Some global variables - these are initialized by QColor::initialize()
//
Display *QPaintDevice::x_appdisplay = 0;
int QPaintDevice::x_appscreen;
int QPaintDevice::x_appdepth;
int QPaintDevice::x_appcells;
Qt::HANDLE QPaintDevice::x_approotwindow;
Qt::HANDLE QPaintDevice::x_appcolormap;
bool QPaintDevice::x_appdefcolormap;
void *QPaintDevice::x_appvisual;
bool QPaintDevice::x_appdefvisual;
// ### in 4.0, remove the above, and use the below
int *QPaintDevice::x_appdepth_arr;
int *QPaintDevice::x_appcells_arr;
Qt::HANDLE *QPaintDevice::x_approotwindow_arr;
Qt::HANDLE *QPaintDevice::x_appcolormap_arr;
bool *QPaintDevice::x_appdefcolormap_arr;
void **QPaintDevice::x_appvisual_arr;
bool *QPaintDevice::x_appdefvisual_arr;
/*!
\enum QPaintDevice::PDevCmd
\internal
*/
/*!
Constructs a paint device with internal flags \a devflags. This
constructor can be invoked only from QPaintDevice subclasses.
*/
QPaintDevice::QPaintDevice( uint devflags )
{
if ( !qApp ) { // global constructor
#if defined(QT_CHECK_STATE)
qFatal( "QPaintDevice: Must construct a QApplication before a "
"QPaintDevice" );
#endif
return;
}
devFlags = devflags;
painters = 0;
hd = 0;
rendhd = 0;
x11Data = 0;
}
/*!
Destroys the paint device and frees window system resources.
*/
QPaintDevice::~QPaintDevice()
{
#if defined(QT_CHECK_STATE)
if ( paintingActive() )
qWarning( "QPaintDevice: Cannot destroy paint device that is being "
"painted" );
#endif
if ( x11Data && x11Data->deref() ) {
delete x11Data;
x11Data = 0;
}
}
/*
\internal
Makes a shallow copy of the X11-specific data of \a fromDevice, if it is not
null. Otherwise this function sets it to null.
*/
void QPaintDevice::copyX11Data( const QPaintDevice *fromDevice )
{
setX11Data( fromDevice ? fromDevice->x11Data : 0 );
}
/*
\internal
Makes a deep copy of the X11-specific data of \a fromDevice, if it is not
null. Otherwise this function sets it to null.
*/
void QPaintDevice::cloneX11Data( const QPaintDevice *fromDevice )
{
if ( fromDevice && fromDevice->x11Data ) {
QPaintDeviceX11Data *d = new QPaintDeviceX11Data;
*d = *fromDevice->x11Data;
d->count = 0;
setX11Data( d );
} else {
setX11Data( 0 );
}
}
/*
\internal
Makes a shallow copy of the X11-specific data \a d and assigns it to this
class. This function increments the reference code of \a d.
*/
void QPaintDevice::setX11Data( const QPaintDeviceX11Data* d )
{
if ( x11Data && x11Data->deref() )
delete x11Data;
x11Data = (QPaintDeviceX11Data*)d;
if ( x11Data )
x11Data->ref();
}
/*
\internal
If \a def is FALSE, returns a deep copy of the x11Data, or 0 if x11Data is 0.
If \a def is TRUE, makes a QPaintDeviceX11Data struct filled with the default
values.
In either case the caller is responsible for deleting the returned
struct. But notice that the struct is a shared class, so other
classes might also have a reference to it. The reference count of
the returned QPaintDeviceX11Data* is 0.
*/
QPaintDeviceX11Data* QPaintDevice::getX11Data( bool def ) const
{
QPaintDeviceX11Data* res = 0;
if ( def ) {
res = new QPaintDeviceX11Data;
res->x_display = x11AppDisplay();
res->x_screen = x11AppScreen();
res->x_depth = x11AppDepth();
res->x_cells = x11AppCells();
res->x_colormap = x11Colormap();
res->x_defcolormap = x11AppDefaultColormap();
res->x_visual = x11AppVisual();
res->x_defvisual = x11AppDefaultVisual();
res->deref();
} else if ( x11Data ) {
res = new QPaintDeviceX11Data;
*res = *x11Data;
res->count = 0;
}
return res;
}
/*!
\fn int QPaintDevice::devType() const
\internal
Returns the device type identifier, which is \c QInternal::Widget
if the device is a QWidget, \c QInternal::Pixmap if it's a
QPixmap, \c QInternal::Printer if it's a QPrinter, \c
QInternal::Picture if it's a QPicture or \c
QInternal::UndefinedDevice in other cases (which should never
happen).
*/
/*!
\fn bool QPaintDevice::isExtDev() const
Returns TRUE if the device is an external paint device; otherwise
returns FALSE.
External paint devices cannot be bitBlt()'ed from. QPicture and
QPrinter are external paint devices.
*/
/*!
Returns the window system handle of the paint device, for
low-level access. Using this function is not portable.
The HANDLE type varies with platform; see \c qpaintdevice.h and
\c qwindowdefs.h for details.
\sa x11Display()
*/
Qt::HANDLE QPaintDevice::handle() const
{
return hd;
}
/*!
Returns the window system handle of the paint device for XRender
support. Use of this function is not portable. This function will
return 0 if XRender support is not compiled into Qt, if the
XRender extension is not supported on the X11 display, or if the
handle could not be created.
*/
Qt::HANDLE QPaintDevice::x11RenderHandle() const
{
#ifndef QT_NO_XFTFREETYPE
return rendhd ? XftDrawPicture( (XftDraw *) rendhd ) : 0;
#else
return 0;
#endif // QT_NO_XFTFREETYPE
}
/*!
\fn Display *QPaintDevice::x11AppDisplay()
Returns a pointer to the X display global to the application (X11
only). Using this function is not portable.
\sa handle()
*/
/*!
\fn int QPaintDevice::x11AppScreen()
Returns the screen number on the X display global to the
application (X11 only). Using this function is not portable.
*/
/*!
\overload
\fn int QPaintDevice::x11AppDepth()
Returns the depth for the default screen of the X display global
to the application (X11 only). Using this function is not
portable.
\sa QPixmap::defaultDepth()
*/
/*!
\fn int QPaintDevice::x11AppCells()
Returns the number of entries in the colormap for the default
screen of the X display global to the application (X11
only). Using this function is not portable.
\sa x11Colormap()
*/
/*!
\fn HANDLE QPaintDevice::x11AppRootWindow()
Returns the root window for the default screen of the X display
global to the applicatoin (X11 only). Using this function is not
portable.
*/
/*!
\fn HANDLE QPaintDevice::x11AppColormap()
Returns the colormap for the default screen of the X display
global to the application (X11 only). Using this function is not
portable.
\sa x11Cells()
*/
/*!
\fn bool QPaintDevice::x11AppDefaultColormap ()
Returns the default colormap for the default screen of the X
display global to the application (X11 only). Using this function
is not portable.
\sa x11Cells()
*/
/*!
\fn void* QPaintDevice::x11AppVisual ()
Returns the Visual for the default screen of the X display global
to the application (X11 only). Using this function is not
portable.
*/
/*!
\fn bool QPaintDevice::x11AppDefaultVisual ()
Returns TRUE if the Visual used is the default for the default
screen of the X display global to the application (X11 only);
otherwise returns FALSE. Using this function is not portable.
*/
/*!
\fn int QPaintDevice::x11AppDepth( int screen )
Returns the depth for screen \a screen of the X display global to
the application (X11 only). Using this function is not portable.
\sa QPixmap::defaultDepth()
*/
/*!
\overload
\fn int QPaintDevice::x11AppCells( int screen )
Returns the number of entries in the colormap for screen \a screen
of the X display global to the application (X11 only). Using this
function is not portable.
\sa x11Colormap()
*/
/*!
\overload
\fn HANDLE QPaintDevice::x11AppRootWindow( int screen )
Returns the root window for screen \a screen of the X display
global to the applicatoin (X11 only). Using this function is not
portable.
*/
/*!
\overload
\fn HANDLE QPaintDevice::x11AppColormap( int screen )
Returns the colormap for screen \a screen of the X display global
to the application (X11 only). Using this function is not
portable.
\sa x11Cells()
*/
/*!
\overload
\fn bool QPaintDevice::x11AppDefaultColormap( int screen )
Returns the default colormap for screen \a screen of the X display
global to the application (X11 only). Using this function is not
portable.
\sa x11Cells()
*/
/*!
\overload
\fn void* QPaintDevice::x11AppVisual( int screen )
Returns the Visual for screen \a screen of the X display global to
the application (X11 only). Using this function is not portable.
*/
/*!
\overload
\fn bool QPaintDevice::x11AppDefaultVisual( int screen )
Returns TRUE if the Visual used is the default for screen
\a screen of the X display global to the application (X11 only);
otherwise returns FALSE. Using this function is not portable.
*/
/*!
\fn Display *QPaintDevice::x11Display() const
Returns a pointer to the X display for the paint device (X11
only). Using this function is not portable.
\sa handle()
*/
/*!
\fn int QPaintDevice::x11Screen () const
Returns the screen number on the X display for the paint device
(X11 only). Using this function is not portable.
*/
/*!
\fn int QPaintDevice::x11Depth () const
Returns the depth of the X display for the paint device (X11
only). Using this function is not portable.
\sa QPixmap::defaultDepth()
*/
/*!
\fn int QPaintDevice::x11Cells () const
Returns the number of entries in the colormap of the X display for
the paint device (X11 only). Using this function is not portable.
\sa x11Colormap()
*/
/*!
\fn HANDLE QPaintDevice::x11Colormap () const
Returns the colormap of the X display for the paint device (X11
only). Using this function is not portable.
\sa x11Cells()
*/
/*!
\fn bool QPaintDevice::x11DefaultColormap () const
Returns the default colormap of the X display for the paint device
(X11 only). Using this function is not portable.
\sa x11Cells()
*/
/*!
\fn void* QPaintDevice::x11Visual () const
Returns the Visual of the X display for the paint device (X11
only). Using this function is not portable.
*/
/*!
\fn bool QPaintDevice::x11DefaultVisual () const
Returns the default Visual of the X display for the paint device
(X11 only). Using this function is not portable.
*/
static int *dpisX=0, *dpisY=0;
static void create_dpis()
{
if ( dpisX )
return;
Display *dpy = QPaintDevice::x11AppDisplay();
if ( ! dpy )
return;
int i, screens = ScreenCount( dpy );
dpisX = new int[ screens ];
dpisY = new int[ screens ];
Q_CHECK_PTR( dpisX );
Q_CHECK_PTR( dpisY );
for ( i = 0; i < screens; i++ ) {
if (DisplayWidthMM(dpy,i) < 1)
dpisX[ i ] = 75; // default the dpi to 75.
else
dpisX[ i ] = (DisplayWidth(dpy,i) * 254 + DisplayWidthMM(dpy,i)*5)
/ (DisplayWidthMM(dpy,i)*10);
if (DisplayHeightMM(dpy,i) < 1)
dpisY[ i ] = 75; // default the dpi to 75.
else
dpisY[ i ] = (DisplayHeight(dpy,i) * 254 + DisplayHeightMM(dpy,i)*5)
/ (DisplayHeightMM(dpy,i)*10);
}
}
/*!
Sets the value returned by x11AppDpiX() to \a dpi for screen
\a screen. The default is determined by the display configuration.
Changing this value will alter the scaling of fonts and many other
metrics and is not recommended. Using this function is not
portable.
\sa x11SetAppDpiY()
*/
void QPaintDevice::x11SetAppDpiX(int dpi, int screen)
{
create_dpis();
if ( ! dpisX )
return;
if ( screen < 0 )
screen = QPaintDevice::x11AppScreen();
if ( screen > ScreenCount( QPaintDevice::x11AppDisplay() ) )
return;
dpisX[ screen ] = dpi;
}
/*!
\overload
Sets the value returned by x11AppDpiX() to \a dpi for the default
screen. The default is determined by the display configuration.
Changing this value will alter the scaling of fonts and many other
metrics and is not recommended. Using this function is not
portable.
*/
// ### REMOVE 4.0
void QPaintDevice::x11SetAppDpiX( int dpi )
{
QPaintDevice::x11SetAppDpiX( dpi, -1 );
}
/*!
Sets the value returned by x11AppDpiY() to \a dpi for screen
\a screen. The default is determined by the display configuration.
Changing this value will alter the scaling of fonts and many other
metrics and is not recommended. Using this function is not
portable.
\sa x11SetAppDpiX()
*/
void QPaintDevice::x11SetAppDpiY(int dpi, int screen)
{
create_dpis();
if ( ! dpisY )
return;
if ( screen < 0 )
screen = QPaintDevice::x11AppScreen();
if ( screen > ScreenCount( QPaintDevice::x11AppDisplay() ) )
return;
dpisY[ screen ] = dpi;
}
/*!
\overload
Sets the value returned by x11AppDpiY() to \a dpi for the default
screen. The default is determined by the display configuration.
Changing this value will alter the scaling of fonts and many other
metrics and is not recommended. Using this function is not
portable.
*/
// ### REMOVE 4.0
void QPaintDevice::x11SetAppDpiY( int dpi )
{
QPaintDevice::x11SetAppDpiY( dpi, -1 );
}
/*!
Returns the horizontal DPI of the X display (X11 only) for screen
\a screen. Using this function is not portable. See
QPaintDeviceMetrics for portable access to related information.
Using this function is not portable.
\sa x11AppDpiY(), x11SetAppDpiX(), QPaintDeviceMetrics::logicalDpiX()
*/
int QPaintDevice::x11AppDpiX(int screen)
{
create_dpis();
if ( ! dpisX )
return 0;
if ( screen < 0 )
screen = QPaintDevice::x11AppScreen();
if ( screen > ScreenCount( QPaintDevice::x11AppDisplay() ) )
return 0;
return dpisX[ screen ];
}
/*!
\overload
Returns the horizontal DPI of the X display (X11 only) for the
default screen. Using this function is not portable. See
QPaintDeviceMetrics for portable access to related information.
Using this function is not portable.
*/
int QPaintDevice::x11AppDpiX()
{
return QPaintDevice::x11AppDpiX( -1 );
}
/*!
Returns the vertical DPI of the X11 display (X11 only) for screen
\a screen. Using this function is not portable. See
QPaintDeviceMetrics for portable access to related information.
Using this function is not portable.
\sa x11AppDpiX(), x11SetAppDpiY(), QPaintDeviceMetrics::logicalDpiY()
*/
int QPaintDevice::x11AppDpiY( int screen )
{
create_dpis();
if ( ! dpisY )
return 0;
if ( screen < 0 )
screen = QPaintDevice::x11AppScreen();
if ( screen > ScreenCount( QPaintDevice::x11AppDisplay() ) )
return 0;
return dpisY[ screen ];
}
/*!
\overload
Returns the vertical DPI of the X11 display (X11 only) for the
default screen. Using this function is not portable. See
QPaintDeviceMetrics for portable access to related information.
Using this function is not portable.
\sa x11AppDpiX(), x11SetAppDpiY(), QPaintDeviceMetrics::logicalDpiY()
*/
int QPaintDevice::x11AppDpiY()
{
return QPaintDevice::x11AppDpiY( -1 );
}
/*!
\fn bool QPaintDevice::paintingActive() const
Returns TRUE if the device is being painted, i.e. someone has
called QPainter::begin() but not yet called QPainter::end() for
this device; otherwise returns FALSE.
\sa QPainter::isActive()
*/
/*!
Internal virtual function that interprets drawing commands from
the painter.
Implemented by subclasses that have no direct support for drawing
graphics (external paint devices, for example, QPicture).
*/
bool QPaintDevice::cmd( int, QPainter *, QPDevCmdParam * )
{
#if defined(QT_CHECK_STATE)
qWarning( "QPaintDevice::cmd: Device has no command interface" );
#endif
return FALSE;
}
/*!
\internal
Internal virtual function that returns paint device metrics.
Please use the QPaintDeviceMetrics class instead.
*/
int QPaintDevice::metric( int ) const
{
#if defined(QT_CHECK_STATE)
qWarning( "QPaintDevice::metrics: Device has no metric information" );
#endif
return 0;
}
/*!
\internal
Internal virtual function. Reserved for future use.
Please use the QFontMetrics class instead.
*/
int QPaintDevice::fontMet( QFont *, int, const char *, int ) const
{
return 0;
}
/*!
\internal
Internal virtual function. Reserved for future use.
Please use the QFontInfo class instead.
*/
int QPaintDevice::fontInf( QFont *, int ) const
{
return 0;
}
//
// Internal functions for simple GC caching for blt'ing masked pixmaps.
// This cache is used when the pixmap optimization is set to Normal
// and the pixmap size doesn't exceed 128x128.
//
static bool init_mask_gc = FALSE;
static const int max_mask_gcs = 11; // suitable for hashing
struct mask_gc {
GC gc;
int mask_no;
};
static mask_gc gc_vec[max_mask_gcs];
static void cleanup_mask_gc()
{
Display *dpy = QPaintDevice::x11AppDisplay();
init_mask_gc = FALSE;
for ( int i=0; i<max_mask_gcs; i++ ) {
if ( gc_vec[i].gc )
XFreeGC( dpy, gc_vec[i].gc );
}
}
static GC cache_mask_gc( Display *dpy, Drawable hd, int mask_no, Pixmap mask )
{
if ( !init_mask_gc ) { // first time initialization
init_mask_gc = TRUE;
qAddPostRoutine( cleanup_mask_gc );
for ( int i=0; i<max_mask_gcs; i++ )
gc_vec[i].gc = 0;
}
mask_gc *p = &gc_vec[mask_no % max_mask_gcs];
if ( !p->gc || p->mask_no != mask_no ) { // not a perfect match
if ( !p->gc ) { // no GC
p->gc = XCreateGC( dpy, hd, 0, 0 );
XSetGraphicsExposures( dpy, p->gc, False );
}
XSetClipMask( dpy, p->gc, mask );
p->mask_no = mask_no;
}
return p->gc;
}
/*!
\relates QPaintDevice
Copies a block of pixels from \a src to \a dst, perhaps merging
each pixel according to the \link Qt::RasterOp raster operation \endlink
\a rop. \a sx, \a sy
is the top-left pixel in \a src (0, 0) by default, \a dx, \a dy is
the top-left position in \a dst and \a sw, \a sh is the size of
the copied block (all of \a src by default).
The most common values for \a rop are CopyROP and XorROP; the \l
Qt::RasterOp documentation defines all the possible values.
If \a ignoreMask is FALSE (the default) and \a src is a
masked QPixmap, the entire blit is masked by \a{src}->mask().
If \a src, \a dst, \a sw or \a sh is 0, bitBlt() does nothing. If
\a sw or \a sh is negative bitBlt() copies starting at \a sx (and
respectively, \a sy) and ending at the right end (respectively,
bottom) of \a src.
\a src must be a QWidget or QPixmap. You cannot blit from a
QPrinter, for example. bitBlt() does nothing if you attempt to
blit from an unsupported device.
bitBlt() does nothing if \a src has a greater depth than \e dst.
If you need to for example, draw a 24-bit pixmap on an 8-bit
widget, you must use drawPixmap().
*/
void bitBlt( QPaintDevice *dst, int dx, int dy,
const QPaintDevice *src, int sx, int sy, int sw, int sh,
Qt::RasterOp rop, bool ignoreMask )
{
if ( !src || !dst ) {
#if defined(QT_CHECK_NULL)
Q_ASSERT( src != 0 );
Q_ASSERT( dst != 0 );
#endif
return;
}
if ( !src->handle() || src->isExtDev() )
return;
QPaintDevice *pdev = QPainter::redirect( dst );
if ( pdev )
dst = pdev;
int ts = src->devType(); // from device type
int td = dst->devType(); // to device type
Display *dpy = src->x11Display();
if ( sw <= 0 ) { // special width
if ( sw < 0 )
sw = src->metric( QPaintDeviceMetrics::PdmWidth ) - sx;
else
return;
}
if ( sh <= 0 ) { // special height
if ( sh < 0 )
sh = src->metric( QPaintDeviceMetrics::PdmHeight ) - sy;
else
return;
}
if ( dst->paintingActive() && dst->isExtDev() ) {
QPixmap *pm; // output to picture/printer
bool tmp_pm = TRUE;
if ( ts == QInternal::Pixmap ) {
pm = (QPixmap*)src;
if ( sx != 0 || sy != 0 ||
sw != pm->width() || sh != pm->height() || ignoreMask ) {
QPixmap *tmp = new QPixmap( sw, sh, pm->depth() );
bitBlt( tmp, 0, 0, pm, sx, sy, sw, sh, Qt::CopyROP, TRUE );
if ( pm->mask() && !ignoreMask ) {
QBitmap mask( sw, sh );
bitBlt( &mask, 0, 0, pm->mask(), sx, sy, sw, sh,
Qt::CopyROP, TRUE );
tmp->setMask( mask );
}
pm = tmp;
} else {
tmp_pm = FALSE;
}
} else if ( ts == QInternal::Widget ) {// bitBlt to temp pixmap
pm = new QPixmap( sw, sh );
Q_CHECK_PTR( pm );
bitBlt( pm, 0, 0, src, sx, sy, sw, sh );
} else {
#if defined(QT_CHECK_RANGE)
qWarning( "bitBlt: Cannot bitBlt from device" );
#endif
return;
}
QPDevCmdParam param[3];
QRect r(dx, dy, pm->width(), pm->height());
param[0].rect = &r;
param[1].pixmap = pm;
dst->cmd( QPaintDevice::PdcDrawPixmap, 0, param );
if ( tmp_pm )
delete pm;
return;
}
switch ( ts ) {
case QInternal::Widget:
case QInternal::Pixmap:
case QInternal::System: // OK, can blt from these
break;
default:
#if defined(QT_CHECK_RANGE)
qWarning( "bitBlt: Cannot bitBlt from device type %x", ts );
#endif
return;
}
switch ( td ) {
case QInternal::Widget:
case QInternal::Pixmap:
case QInternal::System: // OK, can blt to these
break;
default:
#if defined(QT_CHECK_RANGE)
qWarning( "bitBlt: Cannot bitBlt to device type %x", td );
#endif
return;
}
static const short ropCodes[] = { // ROP translation table
GXcopy, GXor, GXxor, GXandInverted,
GXcopyInverted, GXorInverted, GXequiv, GXand,
GXinvert, GXclear, GXset, GXnoop,
GXandReverse, GXorReverse, GXnand, GXnor
};
if ( rop > Qt::LastROP ) {
#if defined(QT_CHECK_RANGE)
qWarning( "bitBlt: Invalid ROP code" );
#endif
return;
}
if ( dst->handle() == 0 ) {
#if defined(QT_CHECK_NULL)
qWarning( "bitBlt: Cannot bitBlt to device" );
#endif
return;
}
bool mono_src;
bool mono_dst;
bool include_inferiors = FALSE;
bool graphics_exposure = FALSE;
QPixmap *src_pm;
QBitmap *mask;
if ( ts == QInternal::Pixmap ) {
src_pm = (QPixmap*)src;
if ( src_pm->x11Screen() != dst->x11Screen() )
src_pm->x11SetScreen( dst->x11Screen() );
mono_src = src_pm->depth() == 1;
mask = ignoreMask ? 0 : src_pm->data->mask;
} else {
src_pm = 0;
mono_src = FALSE;
mask = 0;
include_inferiors = ((QWidget*)src)->testWFlags(Qt::WPaintUnclipped);
graphics_exposure = td == QInternal::Widget;
}
if ( td == QInternal::Pixmap ) {
if ( dst->x11Screen() != src->x11Screen() )
((QPixmap*)dst)->x11SetScreen( src->x11Screen() );
mono_dst = ((QPixmap*)dst)->depth() == 1;
((QPixmap*)dst)->detach(); // changes shared pixmap
} else {
mono_dst = FALSE;
include_inferiors = include_inferiors ||
((QWidget*)dst)->testWFlags(Qt::WPaintUnclipped);
}
if ( mono_dst && !mono_src ) { // dest is 1-bit pixmap, source is not
#if defined(QT_CHECK_RANGE)
qWarning( "bitBlt: Incompatible destination pixmap" );
#endif
return;
}
#ifndef QT_NO_XRENDER
if (src_pm && !mono_src && src_pm->data->alphapm && !ignoreMask ) {
// use RENDER to do the blit
QPixmap *alpha = src_pm->data->alphapm;
if (src->x11RenderHandle() &&
alpha->x11RenderHandle() &&
dst->x11RenderHandle()) {
XRenderPictureAttributes pattr;
ulong picmask = 0;
if (include_inferiors) {
pattr.subwindow_mode = IncludeInferiors;
picmask |= CPSubwindowMode;
}
if (graphics_exposure) {
pattr.graphics_exposures = TRUE;
picmask |= CPGraphicsExposure;
}
if (picmask)
XRenderChangePicture(dpy, dst->x11RenderHandle(), picmask, &pattr);
XRenderComposite(dpy, PictOpOver, src->x11RenderHandle(),
alpha->x11RenderHandle(), dst->x11RenderHandle(),
sx, sy, sx, sy, dx, dy, sw, sh);
// restore attributes
pattr.subwindow_mode = ClipByChildren;
pattr.graphics_exposures = FALSE;
if (picmask)
XRenderChangePicture(dpy, dst->x11RenderHandle(), picmask, &pattr);
return;
}
}
#endif
GC gc;
if ( mask && !mono_src ) { // fast masked blt
bool temp_gc = FALSE;
if ( mask->data->maskgc ) {
gc = (GC)mask->data->maskgc; // we have a premade mask GC
} else {
if ( FALSE && src_pm->optimization() == QPixmap::NormalOptim ) { // #### cache disabled
// Compete for the global cache
gc = cache_mask_gc( dpy, dst->handle(),
mask->data->ser_no,
mask->handle() );
} else {
// Create a new mask GC. If BestOptim, we store the mask GC
// with the mask (not at the pixmap). This way, many pixmaps
// which have a common mask will be optimized at no extra cost.
gc = XCreateGC( dpy, dst->handle(), 0, 0 );
XSetGraphicsExposures( dpy, gc, False );
XSetClipMask( dpy, gc, mask->handle() );
if ( src_pm->optimization() == QPixmap::BestOptim ) {
mask->data->maskgc = gc;
} else {
temp_gc = TRUE;
}
}
}
XSetClipOrigin( dpy, gc, dx-sx, dy-sy );
if ( rop != Qt::CopyROP ) // use non-default ROP code
XSetFunction( dpy, gc, ropCodes[rop] );
if ( include_inferiors ) {
XSetSubwindowMode( dpy, gc, IncludeInferiors );
XCopyArea( dpy, src->handle(), dst->handle(), gc, sx, sy, sw, sh,
dx, dy );
XSetSubwindowMode( dpy, gc, ClipByChildren );
} else {
XCopyArea( dpy, src->handle(), dst->handle(), gc, sx, sy, sw, sh,
dx, dy );
}
if ( temp_gc ) // delete temporary GC
XFreeGC( dpy, gc );
else if ( rop != Qt::CopyROP ) // restore ROP
XSetFunction( dpy, gc, GXcopy );
return;
}
gc = qt_xget_temp_gc( dst->x11Screen(), mono_dst ); // get a reusable GC
if ( rop != Qt::CopyROP ) // use non-default ROP code
XSetFunction( dpy, gc, ropCodes[rop] );
if ( mono_src && mono_dst && src == dst ) { // dst and src are the same bitmap
XCopyArea( dpy, src->handle(), dst->handle(), gc, sx, sy, sw, sh, dx, dy );
} else if ( mono_src ) { // src is bitmap
XGCValues gcvals;
ulong valmask = GCBackground | GCForeground | GCFillStyle |
GCStipple | GCTileStipXOrigin | GCTileStipYOrigin;
if ( td == QInternal::Widget ) { // set GC colors
QWidget *w = (QWidget *)dst;
gcvals.background = w->backgroundColor().pixel( dst->x11Screen() );
gcvals.foreground = w->foregroundColor().pixel( dst->x11Screen() );
if ( include_inferiors ) {
valmask |= GCSubwindowMode;
gcvals.subwindow_mode = IncludeInferiors;
}
} else if ( mono_dst ) {
gcvals.background = 0;
gcvals.foreground = 1;
} else {
gcvals.background = Qt::white.pixel( dst->x11Screen() );
gcvals.foreground = Qt::black.pixel( dst->x11Screen() );
}
gcvals.fill_style = FillOpaqueStippled;
gcvals.stipple = src->handle();
gcvals.ts_x_origin = dx - sx;
gcvals.ts_y_origin = dy - sy;
bool clipmask = FALSE;
if ( mask ) {
if ( ((QPixmap*)src)->data->selfmask ) {
gcvals.fill_style = FillStippled;
} else {
XSetClipMask( dpy, gc, mask->handle() );
XSetClipOrigin( dpy, gc, dx-sx, dy-sy );
clipmask = TRUE;
}
}
XChangeGC( dpy, gc, valmask, &gcvals );
XFillRectangle( dpy,dst->handle(), gc, dx, dy, sw, sh );
valmask = GCFillStyle | GCTileStipXOrigin | GCTileStipYOrigin;
gcvals.fill_style = FillSolid;
gcvals.ts_x_origin = 0;
gcvals.ts_y_origin = 0;
if ( include_inferiors ) {
valmask |= GCSubwindowMode;
gcvals.subwindow_mode = ClipByChildren;
}
XChangeGC( dpy, gc, valmask, &gcvals );
if ( clipmask ) {
XSetClipOrigin( dpy, gc, 0, 0 );
XSetClipMask( dpy, gc, None );
}
} else { // src is pixmap/widget
if ( graphics_exposure ) // widget to widget
XSetGraphicsExposures( dpy, gc, True );
if ( include_inferiors ) {
XSetSubwindowMode( dpy, gc, IncludeInferiors );
XCopyArea( dpy, src->handle(), dst->handle(), gc, sx, sy, sw, sh,
dx, dy );
XSetSubwindowMode( dpy, gc, ClipByChildren );
} else {
XCopyArea( dpy, src->handle(), dst->handle(), gc, sx, sy, sw, sh,
dx, dy );
}
if ( graphics_exposure ) // reset graphics exposure
XSetGraphicsExposures( dpy, gc, False );
}
if ( rop != Qt::CopyROP ) // restore ROP
XSetFunction( dpy, gc, GXcopy );
}
/*!
\relates QPaintDevice
\overload void bitBlt( QPaintDevice *dst, const QPoint &dp, const QPaintDevice *src, const QRect &sr, RasterOp rop )
Overloaded bitBlt() with the destination point \a dp and source
rectangle \a sr.
*/
/*!
\internal
*/
// makes it possible to add a setResolution as we have in QPrinter for all
// paintdevices without breaking bin compatibility.
void QPaintDevice::setResolution( int )
{
}
/*!\internal
*/
int QPaintDevice::resolution() const
{
return metric( QPaintDeviceMetrics::PdmDpiY );
}
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