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/** \file
* SPIcon: Generic icon widget
*/
/*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Bryce Harrington <brycehar@bryceharrington.org>
* bulia byak <buliabyak@users.sf.net>
*
* Copyright (C) 2001-2005 authors
* Copyright (C) 2001 Ximian, Inc.
* Copyright (C) 2004 John Cliff
*
* Released under GNU GPL, read the file 'COPYING' for more information
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib/gmem.h>
#include <gtk/gtk.h>
#include "sp-namedview.h"
#include "selection.h"
#include "inkscape.h"
#include "inkscape-stock.h"
#include "sp-rect.h"
#include "document-private.h"
#include "display/nr-arena.h"
#include "display/nr-arena-item.h"
#include "ui/cache/svg_preview_cache.h"
GdkPixbuf* render_pixbuf(NRArenaItem* root, double scale_factor, const NR::Rect& dbox, unsigned psize) {
NRGC gc(NULL);
NRMatrix t;
nr_matrix_set_scale(&t, scale_factor, scale_factor);
nr_arena_item_set_transform(root, &t);
nr_matrix_set_identity(&gc.transform);
nr_arena_item_invoke_update( root, NULL, &gc,
NR_ARENA_ITEM_STATE_ALL,
NR_ARENA_ITEM_STATE_NONE );
/* Item integer bbox in points */
NRRectL ibox;
ibox.x0 = (int) floor(scale_factor * dbox.min()[NR::X] + 0.5);
ibox.y0 = (int) floor(scale_factor * dbox.min()[NR::Y] + 0.5);
ibox.x1 = (int) floor(scale_factor * dbox.max()[NR::X] + 0.5);
ibox.y1 = (int) floor(scale_factor * dbox.max()[NR::Y] + 0.5);
/* Find visible area */
int width = ibox.x1 - ibox.x0;
int height = ibox.y1 - ibox.y0;
int dx = psize;
int dy = psize;
dx = (dx - width)/2; // watch out for size, since 'unsigned'-'signed' can cause problems if the result is negative
dy = (dy - height)/2;
NRRectL area;
area.x0 = ibox.x0 - dx;
area.y0 = ibox.y0 - dy;
area.x1 = area.x0 + psize;
area.y1 = area.y0 + psize;
/* Actual renderable area */
NRRectL ua;
ua.x0 = std::max(ibox.x0, area.x0);
ua.y0 = std::max(ibox.y0, area.y0);
ua.x1 = std::min(ibox.x1, area.x1);
ua.y1 = std::min(ibox.y1, area.y1);
/* Set up pixblock */
guchar *px = g_new(guchar, 4 * psize * psize);
memset(px, 0x00, 4 * psize * psize);
/* Render */
NRPixBlock B;
nr_pixblock_setup_extern( &B, NR_PIXBLOCK_MODE_R8G8B8A8N,
ua.x0, ua.y0, ua.x1, ua.y1,
px + 4 * psize * (ua.y0 - area.y0) +
4 * (ua.x0 - area.x0),
4 * psize, FALSE, FALSE );
nr_arena_item_invoke_render( root, &ua, &B,
NR_ARENA_ITEM_RENDER_NO_CACHE );
nr_pixblock_release(&B);
GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(px,
GDK_COLORSPACE_RGB,
TRUE,
8, psize, psize, psize * 4,
(GdkPixbufDestroyNotify)g_free,
NULL);
return pixbuf;
}
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