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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 03:13:10 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 03:13:10 +0000 |
commit | 3c57dd931145d43f2b0aef96c4d178135956bf91 (patch) | |
tree | 3de698981e9f0cc2c4f9569b19a5f3595e741f6b /app/display/gimpcanvasarc.c | |
parent | Initial commit. (diff) | |
download | gimp-3c57dd931145d43f2b0aef96c4d178135956bf91.tar.xz gimp-3c57dd931145d43f2b0aef96c4d178135956bf91.zip |
Adding upstream version 2.10.36.upstream/2.10.36
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | app/display/gimpcanvasarc.c | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/app/display/gimpcanvasarc.c b/app/display/gimpcanvasarc.c new file mode 100644 index 0000000..a4041b2 --- /dev/null +++ b/app/display/gimpcanvasarc.c @@ -0,0 +1,369 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * gimpcanvasarc.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 "libgimpmath/gimpmath.h" + +#include "display-types.h" + +#include "core/gimp-cairo.h" + +#include "gimpcanvasarc.h" +#include "gimpdisplayshell.h" + + +enum +{ + PROP_0, + PROP_CENTER_X, + PROP_CENTER_Y, + PROP_RADIUS_X, + PROP_RADIUS_Y, + PROP_START_ANGLE, + PROP_SLICE_ANGLE, + PROP_FILLED +}; + + +typedef struct _GimpCanvasArcPrivate GimpCanvasArcPrivate; + +struct _GimpCanvasArcPrivate +{ + gdouble center_x; + gdouble center_y; + gdouble radius_x; + gdouble radius_y; + gdouble start_angle; + gdouble slice_angle; + gboolean filled; +}; + +#define GET_PRIVATE(arc) \ + ((GimpCanvasArcPrivate *) gimp_canvas_arc_get_instance_private ((GimpCanvasArc *) (arc))) + + +/* local function prototypes */ + +static void gimp_canvas_arc_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); +static void gimp_canvas_arc_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec); +static void gimp_canvas_arc_draw (GimpCanvasItem *item, + cairo_t *cr); +static cairo_region_t * gimp_canvas_arc_get_extents (GimpCanvasItem *item); + + +G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasArc, gimp_canvas_arc, + GIMP_TYPE_CANVAS_ITEM) + +#define parent_class gimp_canvas_arc_parent_class + + +static void +gimp_canvas_arc_class_init (GimpCanvasArcClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass); + + object_class->set_property = gimp_canvas_arc_set_property; + object_class->get_property = gimp_canvas_arc_get_property; + + item_class->draw = gimp_canvas_arc_draw; + item_class->get_extents = gimp_canvas_arc_get_extents; + + g_object_class_install_property (object_class, PROP_CENTER_X, + g_param_spec_double ("center-x", NULL, NULL, + -GIMP_MAX_IMAGE_SIZE, + GIMP_MAX_IMAGE_SIZE, 0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_CENTER_Y, + g_param_spec_double ("center-y", NULL, NULL, + -GIMP_MAX_IMAGE_SIZE, + GIMP_MAX_IMAGE_SIZE, 0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_RADIUS_X, + g_param_spec_double ("radius-x", NULL, NULL, + 0, GIMP_MAX_IMAGE_SIZE, 0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_RADIUS_Y, + g_param_spec_double ("radius-y", NULL, NULL, + 0, GIMP_MAX_IMAGE_SIZE, 0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_START_ANGLE, + g_param_spec_double ("start-angle", NULL, NULL, + -1000, 1000, 0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_SLICE_ANGLE, + g_param_spec_double ("slice-angle", NULL, NULL, + -1000, 1000, 2 * G_PI, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_FILLED, + g_param_spec_boolean ("filled", NULL, NULL, + FALSE, + GIMP_PARAM_READWRITE)); +} + +static void +gimp_canvas_arc_init (GimpCanvasArc *arc) +{ +} + +static void +gimp_canvas_arc_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + GimpCanvasArcPrivate *private = GET_PRIVATE (object); + + switch (property_id) + { + case PROP_CENTER_X: + private->center_x = g_value_get_double (value); + break; + case PROP_CENTER_Y: + private->center_y = g_value_get_double (value); + break; + case PROP_RADIUS_X: + private->radius_x = g_value_get_double (value); + break; + case PROP_RADIUS_Y: + private->radius_y = g_value_get_double (value); + break; + case PROP_START_ANGLE: + private->start_angle = g_value_get_double (value); + break; + case PROP_SLICE_ANGLE: + private->slice_angle = g_value_get_double (value); + break; + case PROP_FILLED: + private->filled = g_value_get_boolean (value); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_canvas_arc_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + GimpCanvasArcPrivate *private = GET_PRIVATE (object); + + switch (property_id) + { + case PROP_CENTER_X: + g_value_set_double (value, private->center_x); + break; + case PROP_CENTER_Y: + g_value_set_double (value, private->center_y); + break; + case PROP_RADIUS_X: + g_value_set_double (value, private->radius_x); + break; + case PROP_RADIUS_Y: + g_value_set_double (value, private->radius_y); + break; + case PROP_START_ANGLE: + g_value_set_double (value, private->start_angle); + break; + case PROP_SLICE_ANGLE: + g_value_set_double (value, private->slice_angle); + break; + case PROP_FILLED: + g_value_set_boolean (value, private->filled); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_canvas_arc_transform (GimpCanvasItem *item, + gdouble *center_x, + gdouble *center_y, + gdouble *radius_x, + gdouble *radius_y) +{ + GimpCanvasArcPrivate *private = GET_PRIVATE (item); + gdouble x1, y1; + gdouble x2, y2; + + gimp_canvas_item_transform_xy_f (item, + private->center_x - private->radius_x, + private->center_y - private->radius_y, + &x1, &y1); + gimp_canvas_item_transform_xy_f (item, + private->center_x + private->radius_x, + private->center_y + private->radius_y, + &x2, &y2); + + x1 = floor (x1); + y1 = floor (y1); + x2 = ceil (x2); + y2 = ceil (y2); + + *center_x = (x1 + x2) / 2.0; + *center_y = (y1 + y2) / 2.0; + + *radius_x = (x2 - x1) / 2.0; + *radius_y = (y2 - y1) / 2.0; + + if (! private->filled) + { + *radius_x = MAX (*radius_x - 0.5, 0.0); + *radius_y = MAX (*radius_y - 0.5, 0.0); + } + + /* avoid cairo_scale (cr, 0.0, 0.0) */ + if (*radius_x == 0.0) *radius_x = 0.000001; + if (*radius_y == 0.0) *radius_y = 0.000001; +} + +static void +gimp_canvas_arc_draw (GimpCanvasItem *item, + cairo_t *cr) +{ + GimpCanvasArcPrivate *private = GET_PRIVATE (item); + gdouble center_x, center_y; + gdouble radius_x, radius_y; + + gimp_canvas_arc_transform (item, + ¢er_x, ¢er_y, + &radius_x, &radius_y); + + cairo_save (cr); + cairo_translate (cr, center_x, center_y); + cairo_scale (cr, radius_x, radius_y); + gimp_cairo_arc (cr, 0.0, 0.0, 1.0, + private->start_angle, private->slice_angle); + cairo_restore (cr); + + if (private->filled) + _gimp_canvas_item_fill (item, cr); + else + _gimp_canvas_item_stroke (item, cr); +} + +static cairo_region_t * +gimp_canvas_arc_get_extents (GimpCanvasItem *item) +{ + GimpCanvasArcPrivate *private = GET_PRIVATE (item); + cairo_region_t *region; + cairo_rectangle_int_t rectangle; + gdouble center_x, center_y; + gdouble radius_x, radius_y; + + gimp_canvas_arc_transform (item, + ¢er_x, ¢er_y, + &radius_x, &radius_y); + + rectangle.x = floor (center_x - radius_x - 1.5); + rectangle.y = floor (center_y - radius_y - 1.5); + rectangle.width = ceil (center_x + radius_x + 1.5) - rectangle.x; + rectangle.height = ceil (center_y + radius_y + 1.5) - rectangle.y; + + region = cairo_region_create_rectangle (&rectangle); + + if (! private->filled && + rectangle.width > 64 * 1.43 && + rectangle.height > 64 * 1.43) + { + radius_x *= 0.7; + radius_y *= 0.7; + + rectangle.x = ceil (center_x - radius_x + 1.5); + rectangle.y = ceil (center_y - radius_y + 1.5); + rectangle.width = floor (center_x + radius_x - 1.5) - rectangle.x; + rectangle.height = floor (center_y + radius_y - 1.5) - rectangle.y; + + cairo_region_subtract_rectangle (region, &rectangle); + } + + return region; +} + +GimpCanvasItem * +gimp_canvas_arc_new (GimpDisplayShell *shell, + gdouble center_x, + gdouble center_y, + gdouble radius_x, + gdouble radius_y, + gdouble start_angle, + gdouble slice_angle, + gboolean filled) +{ + g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL); + + return g_object_new (GIMP_TYPE_CANVAS_ARC, + "shell", shell, + "center-x", center_x, + "center-y", center_y, + "radius-x", radius_x, + "radius-y", radius_y, + "start-angle", start_angle, + "slice-angle", slice_angle, + "filled", filled, + NULL); +} + +void +gimp_canvas_arc_set (GimpCanvasItem *arc, + gdouble center_x, + gdouble center_y, + gdouble radius_x, + gdouble radius_y, + gdouble start_angle, + gdouble slice_angle) +{ + g_return_if_fail (GIMP_IS_CANVAS_ARC (arc)); + + gimp_canvas_item_begin_change (arc); + g_object_set (arc, + "center-x", center_x, + "center-y", center_y, + "radius-x", radius_x, + "radius-y", radius_y, + "start-angle", start_angle, + "slice-angle", slice_angle, + NULL); + gimp_canvas_item_end_change (arc); +} |