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/* 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 <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,
GdkWindow *window,
GtkWidget *widget,
const GdkRectangle *draw_area,
const GdkRectangle *expose_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,
GdkWindow *window,
GtkWidget *widget,
const GdkRectangle *draw_area,
const GdkRectangle *expose_area)
{
GimpVectors *vectors;
GimpStroke *stroke;
GdkRectangle rect, area;
gdouble xscale, yscale;
rect.width = renderer->width;
rect.height = renderer->height;
rect.x = draw_area->x + (draw_area->width - rect.width) / 2;
rect.y = draw_area->y + (draw_area->height - rect.height) / 2;
if (! gdk_rectangle_intersect (&rect, (GdkRectangle *) expose_area, &area))
return;
gdk_draw_rectangle (window, widget->style->white_gc, TRUE,
area.x, area.y, area.width, area.height);
vectors = GIMP_VECTORS (renderer->viewable);
xscale = (gdouble) GIMP_ITEM (vectors)->width / (gdouble) rect.width;
yscale = (gdouble) GIMP_ITEM (vectors)->height / (gdouble) rect.height;
gdk_gc_set_clip_rectangle (widget->style->black_gc, &area);
for (stroke = gimp_vectors_stroke_get_next (vectors, NULL);
stroke != NULL;
stroke = gimp_vectors_stroke_get_next (vectors, stroke))
{
GArray *coordinates;
GdkPoint *points;
gint i;
coordinates = gimp_stroke_interpolate (stroke,
MIN (xscale, yscale) / 2,
NULL);
if (!coordinates)
continue;
if (coordinates->len > 0)
{
points = g_new (GdkPoint, coordinates->len);
for (i = 0; i < coordinates->len; i++)
{
GimpCoords *coords;
coords = &(g_array_index (coordinates, GimpCoords, i));
points[i].x = rect.x + ROUND (coords->x / xscale);
points[i].y = rect.y + ROUND (coords->y / yscale);
}
gdk_draw_lines (window, widget->style->black_gc,
points, coordinates->len);
g_free (points);
}
g_array_free (coordinates, TRUE);
}
gdk_gc_set_clip_rectangle (widget->style->black_gc, NULL);
}
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