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Diffstat (limited to 'app/display/gimpcanvaspen.c')
| -rw-r--r-- | app/display/gimpcanvaspen.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/app/display/gimpcanvaspen.c b/app/display/gimpcanvaspen.c new file mode 100644 index 0000000..d0d01f9 --- /dev/null +++ b/app/display/gimpcanvaspen.c @@ -0,0 +1,231 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * gimpcanvaspen.c + * Copyright (C) 2010 Michael Natterer <mitch@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 3 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, see <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <gegl.h> +#include <gtk/gtk.h> + +#include "libgimpbase/gimpbase.h" +#include "libgimpcolor/gimpcolor.h" +#include "libgimpmath/gimpmath.h" + +#include "display-types.h" + +#include "core/gimpcontext.h" +#include "core/gimpparamspecs.h" + +#include "gimpcanvas-style.h" +#include "gimpcanvaspen.h" +#include "gimpdisplayshell.h" + + +enum +{ + PROP_0, + PROP_COLOR, + PROP_WIDTH +}; + + +typedef struct _GimpCanvasPenPrivate GimpCanvasPenPrivate; + +struct _GimpCanvasPenPrivate +{ + GimpRGB color; + gint width; +}; + +#define GET_PRIVATE(pen) \ + ((GimpCanvasPenPrivate *) gimp_canvas_pen_get_instance_private ((GimpCanvasPen *) (pen))) + + +/* local function prototypes */ + +static void gimp_canvas_pen_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); +static void gimp_canvas_pen_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec); +static cairo_region_t * gimp_canvas_pen_get_extents (GimpCanvasItem *item); +static void gimp_canvas_pen_stroke (GimpCanvasItem *item, + cairo_t *cr); + + +G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasPen, gimp_canvas_pen, + GIMP_TYPE_CANVAS_POLYGON) + +#define parent_class gimp_canvas_pen_parent_class + + +static void +gimp_canvas_pen_class_init (GimpCanvasPenClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass); + + object_class->set_property = gimp_canvas_pen_set_property; + object_class->get_property = gimp_canvas_pen_get_property; + + item_class->get_extents = gimp_canvas_pen_get_extents; + item_class->stroke = gimp_canvas_pen_stroke; + + g_object_class_install_property (object_class, PROP_COLOR, + gimp_param_spec_rgb ("color", NULL, NULL, + FALSE, NULL, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_WIDTH, + g_param_spec_int ("width", NULL, NULL, + 1, G_MAXINT, 1, + GIMP_PARAM_READWRITE)); +} + +static void +gimp_canvas_pen_init (GimpCanvasPen *pen) +{ +} + +static void +gimp_canvas_pen_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + GimpCanvasPenPrivate *private = GET_PRIVATE (object); + + switch (property_id) + { + case PROP_COLOR: + gimp_value_get_rgb (value, &private->color); + break; + case PROP_WIDTH: + private->width = g_value_get_int (value); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_canvas_pen_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + GimpCanvasPenPrivate *private = GET_PRIVATE (object); + + switch (property_id) + { + case PROP_COLOR: + gimp_value_set_rgb (value, &private->color); + break; + case PROP_WIDTH: + g_value_set_int (value, private->width); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static cairo_region_t * +gimp_canvas_pen_get_extents (GimpCanvasItem *item) +{ + GimpCanvasPenPrivate *private = GET_PRIVATE (item); + cairo_region_t *region; + + region = GIMP_CANVAS_ITEM_CLASS (parent_class)->get_extents (item); + + if (region) + { + cairo_rectangle_int_t rectangle; + + cairo_region_get_extents (region, &rectangle); + + rectangle.x -= ceil (private->width / 2.0); + rectangle.y -= ceil (private->width / 2.0); + rectangle.width += private->width + 1; + rectangle.height += private->width + 1; + + cairo_region_union_rectangle (region, &rectangle); + } + + return region; +} + +static void +gimp_canvas_pen_stroke (GimpCanvasItem *item, + cairo_t *cr) +{ + GimpCanvasPenPrivate *private = GET_PRIVATE (item); + + gimp_canvas_set_pen_style (gimp_canvas_item_get_canvas (item), cr, + &private->color, private->width); + cairo_stroke (cr); +} + +GimpCanvasItem * +gimp_canvas_pen_new (GimpDisplayShell *shell, + const GimpVector2 *points, + gint n_points, + GimpContext *context, + GimpActiveColor color, + gint width) +{ + GimpCanvasItem *item; + GimpArray *array; + GimpRGB rgb; + + g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL); + g_return_val_if_fail (points != NULL && n_points > 1, NULL); + g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL); + + array = gimp_array_new ((const guint8 *) points, + n_points * sizeof (GimpVector2), TRUE); + + switch (color) + { + case GIMP_ACTIVE_COLOR_FOREGROUND: + gimp_context_get_foreground (context, &rgb); + break; + + case GIMP_ACTIVE_COLOR_BACKGROUND: + gimp_context_get_background (context, &rgb); + break; + } + + item = g_object_new (GIMP_TYPE_CANVAS_PEN, + "shell", shell, + "points", array, + "color", &rgb, + "width", width, + NULL); + + gimp_array_free (array); + + return item; +} |