mirror of https://github.com/GNOME/gimp.git
130 lines
4.0 KiB
C
130 lines
4.0 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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GtkWidget *widget,
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cairo_t *cr,
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const GdkRectangle *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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GtkWidget *widget,
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cairo_t *cr,
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const GdkRectangle *area)
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{
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GimpVectors *vectors = GIMP_VECTORS (renderer->viewable);
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GimpStroke *stroke;
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gdouble xscale;
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gdouble yscale;
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gint x, y;
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gdk_cairo_set_source_color (cr, &widget->style->white);
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x = area->x + (area->width - renderer->width) / 2;
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y = area->y + (area->height - renderer->height) / 2;
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cairo_rectangle (cr, x, y, renderer->width, renderer->height);
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cairo_clip_preserve (cr);
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cairo_fill (cr);
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cairo_set_line_width (cr, 1.0);
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gdk_cairo_set_source_color (cr, &widget->style->black);
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xscale = (gdouble) gimp_item_width (GIMP_ITEM (vectors)) / (gdouble) renderer->width;
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yscale = (gdouble) gimp_item_height (GIMP_ITEM (vectors)) / (gdouble) renderer->height;
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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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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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GimpCoords *coords = &(g_array_index (coordinates, GimpCoords, 0));
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gdouble cx = x + ROUND (coords->x / xscale);
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gdouble cy = y + ROUND (coords->y / yscale);
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gint i;
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cairo_move_to (cr, cx, cy);
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for (i = 1; i < coordinates->len; i++)
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{
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coords = &(g_array_index (coordinates, GimpCoords, i));
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cx = x + ROUND (coords->x / xscale) + 0.5;
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cy = y + ROUND (coords->y / yscale) + 0.5;
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cairo_line_to (cr, cx, cy);
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}
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cairo_stroke (cr);
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}
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g_array_free (coordinates, TRUE);
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}
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}
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