diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:30:19 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:30:19 +0000 |
commit | 5c1676dfe6d2f3c837a5e074117b45613fd29a72 (patch) | |
tree | cbffb45144febf451e54061db2b21395faf94bfe /app/display/gimpcanvaslimit.c | |
parent | Initial commit. (diff) | |
download | gimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.tar.xz gimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.zip |
Adding upstream version 2.10.34.upstream/2.10.34upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | app/display/gimpcanvaslimit.c | 760 |
1 files changed, 760 insertions, 0 deletions
diff --git a/app/display/gimpcanvaslimit.c b/app/display/gimpcanvaslimit.c new file mode 100644 index 0000000..05dacbb --- /dev/null +++ b/app/display/gimpcanvaslimit.c @@ -0,0 +1,760 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * gimpcanvaslimit.c + * Copyright (C) 2020 Ell + * + * 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 "gimpcanvaslimit.h" +#include "gimpdisplayshell.h" + + +#define DASH_LENGTH 4.0 +#define HIT_DISTANCE 16.0 + + +enum +{ + PROP_0, + PROP_TYPE, + PROP_X, + PROP_Y, + PROP_RADIUS, + PROP_ASPECT_RATIO, + PROP_ANGLE, + PROP_DASHED +}; + + +typedef struct _GimpCanvasLimitPrivate GimpCanvasLimitPrivate; + +struct _GimpCanvasLimitPrivate +{ + GimpLimitType type; + + gdouble x; + gdouble y; + gdouble radius; + gdouble aspect_ratio; + gdouble angle; + + gboolean dashed; +}; + +#define GET_PRIVATE(limit) \ + ((GimpCanvasLimitPrivate *) gimp_canvas_limit_get_instance_private ((GimpCanvasLimit *) (limit))) + + +/* local function prototypes */ + +static void gimp_canvas_limit_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); +static void gimp_canvas_limit_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec); + +static void gimp_canvas_limit_draw (GimpCanvasItem *item, + cairo_t *cr); +static cairo_region_t * gimp_canvas_limit_get_extents (GimpCanvasItem *item); +static gboolean gimp_canvas_limit_hit (GimpCanvasItem *item, + gdouble x, + gdouble y); + + +G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasLimit, gimp_canvas_limit, + GIMP_TYPE_CANVAS_ITEM) + +#define parent_class gimp_canvas_limit_parent_class + + +/* private functions */ + +static void +gimp_canvas_limit_class_init (GimpCanvasLimitClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass); + + object_class->set_property = gimp_canvas_limit_set_property; + object_class->get_property = gimp_canvas_limit_get_property; + + item_class->draw = gimp_canvas_limit_draw; + item_class->get_extents = gimp_canvas_limit_get_extents; + item_class->hit = gimp_canvas_limit_hit; + + g_object_class_install_property (object_class, PROP_TYPE, + g_param_spec_enum ("type", NULL, NULL, + GIMP_TYPE_LIMIT_TYPE, + GIMP_LIMIT_CIRCLE, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_X, + g_param_spec_double ("x", NULL, NULL, + -G_MAXDOUBLE, + +G_MAXDOUBLE, + 0.0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_Y, + g_param_spec_double ("y", NULL, NULL, + -G_MAXDOUBLE, + +G_MAXDOUBLE, + 0.0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_RADIUS, + g_param_spec_double ("radius", NULL, NULL, + 0.0, + +G_MAXDOUBLE, + 0.0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_ASPECT_RATIO, + g_param_spec_double ("aspect-ratio", NULL, NULL, + -1.0, + +1.0, + 0.0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_ANGLE, + g_param_spec_double ("angle", NULL, NULL, + -G_MAXDOUBLE, + +G_MAXDOUBLE, + 0.0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_DASHED, + g_param_spec_boolean ("dashed", NULL, NULL, + FALSE, + GIMP_PARAM_READWRITE)); +} + +static void +gimp_canvas_limit_init (GimpCanvasLimit *limit) +{ +} + +static void +gimp_canvas_limit_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + GimpCanvasLimitPrivate *priv = GET_PRIVATE (object); + + switch (property_id) + { + case PROP_TYPE: + priv->type = g_value_get_enum (value); + break; + + case PROP_X: + priv->x = g_value_get_double (value); + break; + + case PROP_Y: + priv->y = g_value_get_double (value); + break; + + case PROP_RADIUS: + priv->radius = g_value_get_double (value); + break; + + case PROP_ASPECT_RATIO: + priv->aspect_ratio = g_value_get_double (value); + break; + + case PROP_ANGLE: + priv->angle = g_value_get_double (value); + break; + + case PROP_DASHED: + priv->dashed = g_value_get_boolean (value); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_canvas_limit_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + GimpCanvasLimitPrivate *priv = GET_PRIVATE (object); + + switch (property_id) + { + case PROP_TYPE: + g_value_set_enum (value, priv->type); + break; + + case PROP_X: + g_value_set_double (value, priv->x); + break; + + case PROP_Y: + g_value_set_double (value, priv->y); + break; + + case PROP_RADIUS: + g_value_set_double (value, priv->radius); + break; + + case PROP_ASPECT_RATIO: + g_value_set_double (value, priv->aspect_ratio); + break; + + case PROP_ANGLE: + g_value_set_double (value, priv->angle); + break; + + case PROP_DASHED: + g_value_set_boolean (value, priv->dashed); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_canvas_limit_transform (GimpCanvasItem *item, + gdouble *x, + gdouble *y, + gdouble *rx, + gdouble *ry) +{ + GimpCanvasLimit *limit = GIMP_CANVAS_LIMIT (item); + GimpCanvasLimitPrivate *priv = GET_PRIVATE (item); + gdouble x1, y1; + gdouble x2, y2; + gdouble min_radius = 0.0; + + gimp_canvas_limit_get_radii (limit, rx, ry); + + gimp_canvas_item_transform_xy_f (item, + priv->x - *rx, priv->y - *ry, + &x1, &y1); + gimp_canvas_item_transform_xy_f (item, + priv->x + *rx, priv->y + *ry, + &x2, &y2); + + x1 = floor (x1) + 0.5; + y1 = floor (y1) + 0.5; + + x2 = floor (x2) + 0.5; + y2 = floor (y2) + 0.5; + + *x = (x1 + x2) / 2.0; + *y = (y1 + y2) / 2.0; + + *rx = (x2 - x1) / 2.0; + *ry = (y2 - y1) / 2.0; + + switch (priv->type) + { + case GIMP_LIMIT_CIRCLE: + case GIMP_LIMIT_SQUARE: + min_radius = 2.0; + break; + + case GIMP_LIMIT_DIAMOND: + min_radius = 3.0; + break; + + case GIMP_LIMIT_HORIZONTAL: + case GIMP_LIMIT_VERTICAL: + min_radius = 1.0; + break; + } + + *rx = MAX (*rx, min_radius); + *ry = MAX (*ry, min_radius); +} + +static void +gimp_canvas_limit_paint (GimpCanvasItem *item, + cairo_t *cr) +{ + GimpCanvasLimitPrivate *priv = GET_PRIVATE (item); + GimpDisplayShell *shell = gimp_canvas_item_get_shell (item); + gdouble x, y; + gdouble rx, ry; + gdouble inf; + + gimp_canvas_limit_transform (item, + &x, &y, + &rx, &ry); + + cairo_save (cr); + + cairo_translate (cr, x, y); + cairo_rotate (cr, priv->angle); + cairo_scale (cr, rx, ry); + + inf = MAX (x, shell->disp_width - x) + + MAX (y, shell->disp_height - y); + + switch (priv->type) + { + case GIMP_LIMIT_CIRCLE: + cairo_arc (cr, 0.0, 0.0, 1.0, 0.0, 2.0 * G_PI); + break; + + case GIMP_LIMIT_SQUARE: + cairo_rectangle (cr, -1.0, -1.0, 2.0, 2.0); + break; + + case GIMP_LIMIT_DIAMOND: + cairo_move_to (cr, 0.0, -1.0); + cairo_line_to (cr, +1.0, 0.0); + cairo_line_to (cr, 0.0, +1.0); + cairo_line_to (cr, -1.0, 0.0); + cairo_close_path (cr); + break; + + case GIMP_LIMIT_HORIZONTAL: + cairo_move_to (cr, -inf / rx, -1.0); + cairo_line_to (cr, +inf / rx, -1.0); + + cairo_move_to (cr, -inf / rx, +1.0); + cairo_line_to (cr, +inf / rx, +1.0); + break; + + case GIMP_LIMIT_VERTICAL: + cairo_move_to (cr, -1.0, -inf / ry); + cairo_line_to (cr, -1.0, +inf / ry); + + cairo_move_to (cr, +1.0, -inf / ry); + cairo_line_to (cr, +1.0, +inf / ry); + break; + } + + cairo_restore (cr); +} + +static void +gimp_canvas_limit_draw (GimpCanvasItem *item, + cairo_t *cr) +{ + GimpCanvasLimitPrivate *priv = GET_PRIVATE (item); + + gimp_canvas_limit_paint (item, cr); + + cairo_save (cr); + + if (priv->dashed) + cairo_set_dash (cr, (const gdouble[]) {DASH_LENGTH}, 1, 0.0); + + _gimp_canvas_item_stroke (item, cr); + + cairo_restore (cr); +} + +static cairo_region_t * +gimp_canvas_limit_get_extents (GimpCanvasItem *item) +{ + cairo_t *cr; + cairo_surface_t *surface; + cairo_rectangle_int_t rectangle; + gdouble x1, y1; + gdouble x2, y2; + + surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1); + + cr = cairo_create (surface); + + gimp_canvas_limit_paint (item, cr); + + cairo_path_extents (cr, + &x1, &y1, + &x2, &y2); + + cairo_destroy (cr); + + cairo_surface_destroy (surface); + + rectangle.x = floor (x1 - 1.5); + rectangle.y = floor (y1 - 1.5); + rectangle.width = ceil (x2 + 1.5) - rectangle.x; + rectangle.height = ceil (y2 + 1.5) - rectangle.y; + + return cairo_region_create_rectangle (&rectangle); +} + +static gboolean +gimp_canvas_limit_hit (GimpCanvasItem *item, + gdouble x, + gdouble y) +{ + GimpCanvasLimit *limit = GIMP_CANVAS_LIMIT (item); + gdouble bx, by; + + gimp_canvas_limit_boundary_point (limit, + x, y, + &bx, &by); + + return gimp_canvas_item_transform_distance (item, + x, y, + bx, by) <= HIT_DISTANCE; +} + + +/* public functions */ + +GimpCanvasItem * +gimp_canvas_limit_new (GimpDisplayShell *shell, + GimpLimitType type, + gdouble x, + gdouble y, + gdouble radius, + gdouble aspect_ratio, + gdouble angle, + gboolean dashed) +{ + g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL); + + return g_object_new (GIMP_TYPE_CANVAS_LIMIT, + "shell", shell, + "type", type, + "x", x, + "y", y, + "radius", radius, + "aspect-ratio", aspect_ratio, + "angle", angle, + "dashed", dashed, + NULL); +} + +void +gimp_canvas_limit_get_radii (GimpCanvasLimit *limit, + gdouble *rx, + gdouble *ry) +{ + GimpCanvasLimitPrivate *priv; + + g_return_if_fail (GIMP_IS_CANVAS_LIMIT (limit)); + + priv = GET_PRIVATE (limit); + + if (priv->aspect_ratio >= 0.0) + { + if (rx) *rx = priv->radius; + if (ry) *ry = priv->radius * (1.0 - priv->aspect_ratio); + } + else + { + if (rx) *rx = priv->radius * (1.0 + priv->aspect_ratio); + if (ry) *ry = priv->radius; + } +} + +gboolean +gimp_canvas_limit_is_inside (GimpCanvasLimit *limit, + gdouble x, + gdouble y) +{ + GimpCanvasLimitPrivate *priv; + GimpVector2 p; + gdouble rx, ry; + + g_return_val_if_fail (GIMP_IS_CANVAS_LIMIT (limit), FALSE); + + priv = GET_PRIVATE (limit); + + gimp_canvas_limit_get_radii (limit, &rx, &ry); + + if (rx == 0.0 || ry == 0.0) + return FALSE; + + p.x = x - priv->x; + p.y = y - priv->y; + + gimp_vector2_rotate (&p, +priv->angle); + + p.x = fabs (p.x / rx); + p.y = fabs (p.y / ry); + + switch (priv->type) + { + case GIMP_LIMIT_CIRCLE: + return gimp_vector2_length (&p) < 1.0; + + case GIMP_LIMIT_SQUARE: + return p.x < 1.0 && p.y < 1.0; + + case GIMP_LIMIT_DIAMOND: + return p.x + p.y < 1.0; + + case GIMP_LIMIT_HORIZONTAL: + return p.y < 1.0; + + case GIMP_LIMIT_VERTICAL: + return p.x < 1.0; + } + + g_return_val_if_reached (FALSE); +} + +void +gimp_canvas_limit_boundary_point (GimpCanvasLimit *limit, + gdouble x, + gdouble y, + gdouble *bx, + gdouble *by) +{ + GimpCanvasLimitPrivate *priv; + GimpVector2 p; + gdouble rx, ry; + gboolean flip_x = FALSE; + gboolean flip_y = FALSE; + + g_return_if_fail (GIMP_IS_CANVAS_LIMIT (limit)); + g_return_if_fail (bx != NULL); + g_return_if_fail (by != NULL); + + priv = GET_PRIVATE (limit); + + gimp_canvas_limit_get_radii (limit, &rx, &ry); + + p.x = x - priv->x; + p.y = y - priv->y; + + gimp_vector2_rotate (&p, +priv->angle); + + if (p.x < 0.0) + { + p.x = -p.x; + + flip_x = TRUE; + } + + if (p.y < 0.0) + { + p.y = -p.y; + + flip_y = TRUE; + } + + switch (priv->type) + { + case GIMP_LIMIT_CIRCLE: + if (rx == ry) + { + gimp_vector2_normalize (&p); + + gimp_vector2_mul (&p, rx); + } + else + { + gdouble a0 = 0.0; + gdouble a1 = G_PI / 2.0; + gdouble a; + gint i; + + for (i = 0; i < 20; i++) + { + GimpVector2 r; + GimpVector2 n; + + a = (a0 + a1) / 2.0; + + r.x = p.x - rx * cos (a); + r.y = p.y - ry * sin (a); + + n.x = 1.0; + n.y = tan (a) * rx / ry; + + if (gimp_vector2_cross_product (&r, &n).x >= 0.0) + a1 = a; + else + a0 = a; + } + + a = (a0 + a1) / 2.0; + + p.x = rx * cos (a); + p.y = ry * sin (a); + } + break; + + case GIMP_LIMIT_SQUARE: + if (p.x <= rx || p.y <= ry) + { + if (rx - p.x <= ry - p.y) + p.x = rx; + else + p.y = ry; + } + else + { + p.x = rx; + p.y = ry; + } + break; + + case GIMP_LIMIT_DIAMOND: + { + GimpVector2 l; + GimpVector2 r; + gdouble t; + + l.x = rx; + l.y = -ry; + + r.x = p.x; + r.y = p.y - ry; + + t = gimp_vector2_inner_product (&r, &l) / + gimp_vector2_inner_product (&l, &l); + t = CLAMP (t, 0.0, 1.0); + + p.x = rx * t; + p.y = ry * (1.0 - t); + } + break; + + case GIMP_LIMIT_HORIZONTAL: + p.y = ry; + break; + + case GIMP_LIMIT_VERTICAL: + p.x = rx; + break; + } + + if (flip_x) + p.x = -p.x; + + if (flip_y) + p.y = -p.y; + + gimp_vector2_rotate (&p, -priv->angle); + + *bx = priv->x + p.x; + *by = priv->y + p.y; +} + +gdouble +gimp_canvas_limit_boundary_radius (GimpCanvasLimit *limit, + gdouble x, + gdouble y) +{ + GimpCanvasLimitPrivate *priv; + GimpVector2 p; + + g_return_val_if_fail (GIMP_IS_CANVAS_LIMIT (limit), 0.0); + + priv = GET_PRIVATE (limit); + + p.x = x - priv->x; + p.y = y - priv->y; + + gimp_vector2_rotate (&p, +priv->angle); + + p.x = fabs (p.x); + p.y = fabs (p.y); + + if (priv->aspect_ratio >= 0.0) + p.y /= 1.0 - priv->aspect_ratio; + else + p.x /= 1.0 + priv->aspect_ratio; + + switch (priv->type) + { + case GIMP_LIMIT_CIRCLE: + return gimp_vector2_length (&p); + + case GIMP_LIMIT_SQUARE: + return MAX (p.x, p.y); + + case GIMP_LIMIT_DIAMOND: + return p.x + p.y; + + case GIMP_LIMIT_HORIZONTAL: + return p.y; + + case GIMP_LIMIT_VERTICAL: + return p.x; + } + + g_return_val_if_reached (0.0); +} + +void +gimp_canvas_limit_center_point (GimpCanvasLimit *limit, + gdouble x, + gdouble y, + gdouble *cx, + gdouble *cy) +{ + GimpCanvasLimitPrivate *priv; + GimpVector2 p; + + g_return_if_fail (GIMP_IS_CANVAS_LIMIT (limit)); + g_return_if_fail (cx != NULL); + g_return_if_fail (cy != NULL); + + priv = GET_PRIVATE (limit); + + p.x = x - priv->x; + p.y = y - priv->y; + + gimp_vector2_rotate (&p, +priv->angle); + + switch (priv->type) + { + case GIMP_LIMIT_CIRCLE: + case GIMP_LIMIT_SQUARE: + case GIMP_LIMIT_DIAMOND: + p.x = 0.0; + p.y = 0.0; + break; + + case GIMP_LIMIT_HORIZONTAL: + p.y = 0.0; + break; + + case GIMP_LIMIT_VERTICAL: + p.x = 0.0; + break; + } + + gimp_vector2_rotate (&p, -priv->angle); + + *cx = priv->x + p.x; + *cy = priv->y + p.y; +} |