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/*
* Helpers for SPItem -> gdk_pixbuf related stuff
*
* Authors:
* John Cliff <simarilius@yahoo.com>
* Jon A. Cruz <jon@joncruz.org>
* Abhishek Sharma
*
* Copyright (C) 2008 John Cliff
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glib.h>
#include <png.h>
#include <2geom/transforms.h>
#include "interface.h"
#include "helper/png-write.h"
#include "display/cairo-utils.h"
#include "display/drawing.h"
#include "display/drawing-context.h"
#include "display/drawing-item.h"
#include "document.h"
#include "sp-item.h"
#include "sp-root.h"
#include "sp-use.h"
#include "sp-defs.h"
#include "unit-constants.h"
#include "helper/pixbuf-ops.h"
// TODO look for copy-n-past duplication of this function:
/**
* Hide all items that are not listed in list, recursively, skipping groups and defs.
*/
static void hide_other_items_recursively(SPObject *o, GSList *list, unsigned dkey)
{
if ( SP_IS_ITEM(o)
&& !SP_IS_DEFS(o)
&& !SP_IS_ROOT(o)
&& !SP_IS_GROUP(o)
&& !SP_IS_USE(o)
&& !g_slist_find(list, o) )
{
SP_ITEM(o)->invoke_hide(dkey);
}
// recurse
if (!g_slist_find(list, o)) {
for ( SPObject *child = o->firstChild() ; child; child = child->getNext() ) {
hide_other_items_recursively(child, list, dkey);
}
}
}
// The following is a mutation of the flood fill code, the marker preview, and random other samplings.
// The dpi settings dont do anything yet, but I want them to, and was wanting to keep reasonably close
// to the call for the interface to the png writing.
bool sp_export_jpg_file(SPDocument *doc, gchar const *filename,
double x0, double y0, double x1, double y1,
unsigned width, unsigned height, double xdpi, double ydpi,
unsigned long bgcolor, double quality,GSList *items)
{
GdkPixbuf* pixbuf = 0;
pixbuf = sp_generate_internal_bitmap(doc, filename, x0, y0, x1, y1,
width, height, xdpi, ydpi,
bgcolor, items );
gchar c[32];
g_snprintf(c, 32, "%f", quality);
gboolean saved = gdk_pixbuf_save (pixbuf, filename, "jpeg", NULL, "quality", c, NULL);
g_free(c);
g_object_unref (pixbuf);
return saved;
}
/**
generates a bitmap from given items
the bitmap is stored in RAM and not written to file
@param x0
@param y0
@param x1
@param y1
@param width
@param height
@param xdpi
@param ydpi
@return the created GdkPixbuf structure or NULL if no memory is allocable
*/
GdkPixbuf *sp_generate_internal_bitmap(SPDocument *doc, gchar const */*filename*/,
double x0, double y0, double x1, double y1,
unsigned width, unsigned height, double xdpi, double ydpi,
unsigned long /*bgcolor*/,
GSList *items_only)
{
if (width == 0 || height == 0) return NULL;
GdkPixbuf* pixbuf = NULL;
/* Create new drawing for offscreen rendering*/
Inkscape::Drawing drawing;
drawing.setExact(true);
unsigned dkey = SPItem::display_key_new(1);
doc->ensureUpToDate();
Geom::Rect screen=Geom::Rect(Geom::Point(x0,y0), Geom::Point(x1, y1));
double padding = 1.0;
Geom::Point origin(screen.min()[Geom::X],
doc->getHeight() - screen[Geom::Y].extent() - screen.min()[Geom::Y]);
origin[Geom::X] = origin[Geom::X] + (screen[Geom::X].extent() * ((1 - padding) / 2));
origin[Geom::Y] = origin[Geom::Y] + (screen[Geom::Y].extent() * ((1 - padding) / 2));
Geom::Scale scale( (xdpi / PX_PER_IN), (ydpi / PX_PER_IN));
Geom::Affine affine = scale * Geom::Translate(-origin * scale);
/* Create ArenaItems and set transform */
Inkscape::DrawingItem *root = doc->getRoot()->invoke_show( drawing, dkey, SP_ITEM_SHOW_DISPLAY);
root->setTransform(affine);
drawing.setRoot(root);
// We show all and then hide all items we don't want, instead of showing only requested items,
// because that would not work if the shown item references something in defs
if (items_only) {
hide_other_items_recursively(doc->getRoot(), items_only, dkey);
}
Geom::IntRect final_bbox = Geom::IntRect::from_xywh(0, 0, width, height);
drawing.update(final_bbox);
cairo_surface_t *surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
if (cairo_surface_status(surface) == CAIRO_STATUS_SUCCESS) {
Inkscape::DrawingContext ct(surface, Geom::Point(0,0));
// render items
drawing.render(ct, final_bbox, Inkscape::DrawingItem::RENDER_BYPASS_CACHE);
pixbuf = gdk_pixbuf_new_from_data(cairo_image_surface_get_data(surface),
GDK_COLORSPACE_RGB, TRUE,
8, width, height, cairo_image_surface_get_stride(surface),
ink_cairo_pixbuf_cleanup,
surface);
convert_pixbuf_argb32_to_normal(pixbuf);
}
else
{
long long size = (long long) height * (long long) cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width);
g_warning("sp_generate_internal_bitmap: not enough memory to create pixel buffer. Need %lld.", size);
cairo_surface_destroy(surface);
}
doc->getRoot()->invoke_hide(dkey);
// gdk_pixbuf_save (pixbuf, "C:\\temp\\internal.jpg", "jpeg", NULL, "quality","100", NULL);
return pixbuf;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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