mirror of https://github.com/GNOME/gimp.git
136 lines
4.3 KiB
C
136 lines
4.3 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpviewrenderervectors.c
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* Copyright (C) 2003 Michael Natterer <mitch@gimp.org>
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* Simon Budig <simon@gimp.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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#include "libgimpmath/gimpmath.h"
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#include "libgimpwidgets/gimpwidgets.h"
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#include "widgets-types.h"
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#include "core/gimpimage.h"
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#include "core/gimpitem.h"
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#include "vectors/gimpstroke.h"
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#include "vectors/gimpvectors.h"
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#include "gimpviewrenderervectors.h"
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static void gimp_view_renderer_vectors_draw (GimpViewRenderer *renderer,
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GdkWindow *window,
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GtkWidget *widget,
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const GdkRectangle *draw_area,
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const GdkRectangle *expose_area);
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G_DEFINE_TYPE (GimpViewRendererVectors, gimp_view_renderer_vectors,
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GIMP_TYPE_VIEW_RENDERER)
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#define parent_class gimp_view_renderer_vectors_parent_class
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static void
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gimp_view_renderer_vectors_class_init (GimpViewRendererVectorsClass *klass)
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{
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GimpViewRendererClass *renderer_class = GIMP_VIEW_RENDERER_CLASS (klass);
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renderer_class->draw = gimp_view_renderer_vectors_draw;
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}
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static void
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gimp_view_renderer_vectors_init (GimpViewRendererVectors *renderer)
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{
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}
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static void
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gimp_view_renderer_vectors_draw (GimpViewRenderer *renderer,
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GdkWindow *window,
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GtkWidget *widget,
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const GdkRectangle *draw_area,
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const GdkRectangle *expose_area)
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{
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GimpVectors *vectors;
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GimpStroke *stroke;
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GdkRectangle rect, area;
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gdouble xscale, yscale;
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rect.width = renderer->width;
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rect.height = renderer->height;
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rect.x = draw_area->x + (draw_area->width - rect.width) / 2;
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rect.y = draw_area->y + (draw_area->height - rect.height) / 2;
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if (! gdk_rectangle_intersect (&rect, (GdkRectangle *) expose_area, &area))
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return;
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gdk_draw_rectangle (window, widget->style->white_gc, TRUE,
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area.x, area.y, area.width, area.height);
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vectors = GIMP_VECTORS (renderer->viewable);
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xscale = (gdouble) GIMP_ITEM (vectors)->width / (gdouble) rect.width;
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yscale = (gdouble) GIMP_ITEM (vectors)->height / (gdouble) rect.height;
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gdk_gc_set_clip_rectangle (widget->style->black_gc, &area);
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for (stroke = gimp_vectors_stroke_get_next (vectors, NULL);
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stroke != NULL;
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stroke = gimp_vectors_stroke_get_next (vectors, stroke))
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{
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GArray *coordinates;
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GdkPoint *points;
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gint i;
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coordinates = gimp_stroke_interpolate (stroke,
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MIN (xscale, yscale) / 2,
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NULL);
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if (!coordinates)
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continue;
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if (coordinates->len > 0)
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{
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points = g_new (GdkPoint, coordinates->len);
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for (i = 0; i < coordinates->len; i++)
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{
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GimpCoords *coords;
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coords = &(g_array_index (coordinates, GimpCoords, i));
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points[i].x = rect.x + ROUND (coords->x / xscale);
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points[i].y = rect.y + ROUND (coords->y / yscale);
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}
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gdk_draw_lines (window, widget->style->black_gc,
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points, coordinates->len);
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g_free (points);
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}
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g_array_free (coordinates, TRUE);
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}
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gdk_gc_set_clip_rectangle (widget->style->black_gc, NULL);
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}
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