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111 lines
3.7 KiB
C
111 lines
3.7 KiB
C
/* Copyright (C) 2000-2012 by George Williams */
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/*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "gwidgetP.h"
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#include "../gdraw/gdrawP.h"
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#include <ggadget.h>
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/* Temporarily do all drawing in this widget to a pixmap rather than the window */
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/* if events are orderly then we can share one pixmap for all windows */
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static GWindow pixmap, cairo_pixmap;
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/* otherwise we create and destroy pixmaps */
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GWindow _GWidget_GetPixmap(GWindow gw,GRect *rect) {
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GWindow ours;
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if ( gw->display!=screen_display )
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return( gw );
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if ( gw->is_pixmap )
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return( gw );
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#ifdef UsingPThreads
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this is a critical section if there are multiple pthreads
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#endif
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if ( GDrawHasCairo(gw)&gc_alpha ) {
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if ( cairo_pixmap==NULL || cairo_pixmap->pos.width<rect->x+rect->width ||
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cairo_pixmap->pos.height<rect->y+rect->height ) {
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if ( cairo_pixmap!=NULL )
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GDrawDestroyWindow(cairo_pixmap);
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/* The 0x8000 on width is a hack to tell create pixmap to use*/
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/* cairo convas */
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cairo_pixmap = GDrawCreatePixmap(gw->display,0x8000|gw->pos.width,gw->pos.height);
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}
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ours = cairo_pixmap;
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cairo_pixmap = NULL;
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} else {
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if ( pixmap==NULL || pixmap->pos.width<rect->x+rect->width ||
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pixmap->pos.height<rect->y+rect->height ) {
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if ( pixmap!=NULL )
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GDrawDestroyWindow(pixmap);
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pixmap = GDrawCreatePixmap(gw->display,gw->pos.width,gw->pos.height);
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}
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ours = pixmap;
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pixmap = NULL;
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}
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#ifdef UsingPThreads
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End critical section
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#endif
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if ( ours==NULL )
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ours = gw;
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else {
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GWidgetD *gd = (GWidgetD *) (gw->widget_data);
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ours->widget_data = gd;
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gd->w = ours;
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GDrawFillRect(ours,rect,gw->ggc->bg);
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}
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return( ours );
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}
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void _GWidget_RestorePixmap(GWindow gw, GWindow ours, GRect *rect) {
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GWidgetD *gd = (GWidgetD *) (gw->widget_data);
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if ( gw==ours )
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return; /* it wasn't a pixmap, all drawing was to real window */
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GDrawDrawPixmap(gw, ours, rect, rect->x, rect->y);
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#ifdef UsingPThreads
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this is a critical section if there are multiple pthreads
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#endif
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if ( GDrawHasCairo(gw)&gc_alpha ) {
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if ( cairo_pixmap!=NULL )
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GDrawDestroyWindow(ours);
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else {
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cairo_pixmap = ours;
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ours->widget_data = NULL;
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}
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} else {
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if ( pixmap!=NULL )
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GDrawDestroyWindow(ours);
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else {
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pixmap = ours;
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ours->widget_data = NULL;
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}
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}
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gd->w = gw;
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#ifdef UsingPThreads
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End critical section
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#endif
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}
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