gimp/app/widgets/gimpviewrenderervectors.c

116 lines
3.5 KiB
C

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpviewrenderervectors.c
* Copyright (C) 2003 Michael Natterer <mitch@gimp.org>
* Simon Budig <simon@gimp.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "widgets-types.h"
#include "core/gimpimage.h"
#include "core/gimpitem.h"
#include "vectors/gimpstroke.h"
#include "vectors/gimpvectors.h"
#include "gimpviewrenderervectors.h"
static void gimp_view_renderer_vectors_draw (GimpViewRenderer *renderer,
GtkWidget *widget,
cairo_t *cr,
const GdkRectangle *area);
G_DEFINE_TYPE (GimpViewRendererVectors, gimp_view_renderer_vectors,
GIMP_TYPE_VIEW_RENDERER)
#define parent_class gimp_view_renderer_vectors_parent_class
static void
gimp_view_renderer_vectors_class_init (GimpViewRendererVectorsClass *klass)
{
GimpViewRendererClass *renderer_class = GIMP_VIEW_RENDERER_CLASS (klass);
renderer_class->draw = gimp_view_renderer_vectors_draw;
}
static void
gimp_view_renderer_vectors_init (GimpViewRendererVectors *renderer)
{
}
static void
gimp_view_renderer_vectors_draw (GimpViewRenderer *renderer,
GtkWidget *widget,
cairo_t *cr,
const GdkRectangle *area)
{
GtkStyle *style = gtk_widget_get_style (widget);
GimpVectors *vectors = GIMP_VECTORS (renderer->viewable);
GimpBezierDesc *bezdesc;
gint x, y;
gdk_cairo_set_source_color (cr, &style->white);
x = area->x + (area->width - renderer->width) / 2;
y = area->y + (area->height - renderer->height) / 2;
cairo_translate (cr, x, y);
cairo_rectangle (cr, 0, 0, renderer->width, renderer->height);
cairo_clip_preserve (cr);
cairo_fill (cr);
bezdesc = gimp_vectors_make_bezier (vectors);
if (bezdesc)
{
gdouble xscale;
gdouble yscale;
xscale = ((gdouble) renderer->width /
(gdouble) gimp_item_get_width (GIMP_ITEM (vectors)));
yscale = ((gdouble) renderer->height /
(gdouble) gimp_item_get_height (GIMP_ITEM (vectors)));
cairo_scale (cr, xscale, yscale);
/* determine line width */
xscale = yscale = 0.5;
cairo_device_to_user_distance (cr, &xscale, &yscale);
cairo_set_line_width (cr, MAX (xscale, yscale));
gdk_cairo_set_source_color (cr, &style->black);
cairo_append_path (cr, (cairo_path_t *) bezdesc);
cairo_stroke (cr);
g_free (bezdesc->data);
g_free (bezdesc);
}
}