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/* Copyright (C) 2000-2011 by George Williams */
/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "gwidgetP.h"
#include "../gdraw/gdrawP.h"
#include <ggadget.h>
/* Temporarily do all drawing in this widget to a pixmap rather than the window */
/* if events are orderly then we can share one pixmap for all windows */
static GWindow pixmap, cairo_pixmap;
/* otherwise we create and destroy pixmaps */
GWindow _GWidget_GetPixmap(GWindow gw,GRect *rect) {
GWindow ours;
if ( gw->display!=screen_display )
return( gw );
if ( gw->is_pixmap )
return( gw );
#ifdef UsingPThreads
this is a critical section if there are multiple pthreads
#endif
if ( GDrawHasCairo(gw)&gc_alpha ) {
if ( cairo_pixmap==NULL || cairo_pixmap->pos.width<rect->x+rect->width ||
cairo_pixmap->pos.height<rect->y+rect->height ) {
if ( cairo_pixmap!=NULL )
GDrawDestroyWindow(cairo_pixmap);
/* The 0x8000 on width is a hack to tell create pixmap to use*/
/* cairo convas */
cairo_pixmap = GDrawCreatePixmap(gw->display,0x8000|gw->pos.width,gw->pos.height);
}
ours = cairo_pixmap;
cairo_pixmap = NULL;
} else {
if ( pixmap==NULL || pixmap->pos.width<rect->x+rect->width ||
pixmap->pos.height<rect->y+rect->height ) {
if ( pixmap!=NULL )
GDrawDestroyWindow(pixmap);
pixmap = GDrawCreatePixmap(gw->display,gw->pos.width,gw->pos.height);
}
ours = pixmap;
pixmap = NULL;
}
#ifdef UsingPThreads
End critical section
#endif
if ( ours==NULL )
ours = gw;
else {
GWidgetD *gd = (GWidgetD *) (gw->widget_data);
ours->widget_data = gd;
gd->w = ours;
GDrawFillRect(ours,rect,gw->ggc->bg);
}
return( ours );
}
void _GWidget_RestorePixmap(GWindow gw, GWindow ours, GRect *rect) {
GWidgetD *gd = (GWidgetD *) (gw->widget_data);
if ( gw==ours )
return; /* it wasn't a pixmap, all drawing was to real window */
GDrawDrawPixmap(gw, ours, rect, rect->x, rect->y);
#ifdef UsingPThreads
this is a critical section if there are multiple pthreads
#endif
if ( GDrawHasCairo(gw)&gc_alpha ) {
if ( cairo_pixmap!=NULL )
GDrawDestroyWindow(ours);
else {
cairo_pixmap = ours;
ours->widget_data = NULL;
}
} else {
if ( pixmap!=NULL )
GDrawDestroyWindow(ours);
else {
pixmap = ours;
ours->widget_data = NULL;
}
}
gd->w = gw;
#ifdef UsingPThreads
End critical section
#endif
}
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