From 5c1676dfe6d2f3c837a5e074117b45613fd29a72 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:30:19 +0200 Subject: Adding upstream version 2.10.34. Signed-off-by: Daniel Baumann --- app/display/gimpcanvasrectangleguides.c | 422 ++++++++++++++++++++++++++++++++ 1 file changed, 422 insertions(+) create mode 100644 app/display/gimpcanvasrectangleguides.c (limited to 'app/display/gimpcanvasrectangleguides.c') diff --git a/app/display/gimpcanvasrectangleguides.c b/app/display/gimpcanvasrectangleguides.c new file mode 100644 index 0000000..b7cc07d --- /dev/null +++ b/app/display/gimpcanvasrectangleguides.c @@ -0,0 +1,422 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * gimpcanvasrectangleguides.c + * Copyright (C) 2011 Michael Natterer + * + * 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 . + */ + +#include "config.h" + +#include +#include + +#include "libgimpbase/gimpbase.h" +#include "libgimpmath/gimpmath.h" + +#include "display-types.h" + +#include "gimpcanvasrectangleguides.h" +#include "gimpdisplayshell.h" + + +#define SQRT5 2.236067977 + + +enum +{ + PROP_0, + PROP_X, + PROP_Y, + PROP_WIDTH, + PROP_HEIGHT, + PROP_TYPE, + PROP_N_GUIDES +}; + + +typedef struct _GimpCanvasRectangleGuidesPrivate GimpCanvasRectangleGuidesPrivate; + +struct _GimpCanvasRectangleGuidesPrivate +{ + gdouble x; + gdouble y; + gdouble width; + gdouble height; + GimpGuidesType type; + gint n_guides; +}; + +#define GET_PRIVATE(rectangle) \ + ((GimpCanvasRectangleGuidesPrivate *) gimp_canvas_rectangle_guides_get_instance_private ((GimpCanvasRectangleGuides *) (rectangle))) + + +/* local function prototypes */ + +static void gimp_canvas_rectangle_guides_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); +static void gimp_canvas_rectangle_guides_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec); +static void gimp_canvas_rectangle_guides_draw (GimpCanvasItem *item, + cairo_t *cr); +static cairo_region_t * gimp_canvas_rectangle_guides_get_extents (GimpCanvasItem *item); + + +G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasRectangleGuides, + gimp_canvas_rectangle_guides, GIMP_TYPE_CANVAS_ITEM) + +#define parent_class gimp_canvas_rectangle_guides_parent_class + + +static void +gimp_canvas_rectangle_guides_class_init (GimpCanvasRectangleGuidesClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass); + + object_class->set_property = gimp_canvas_rectangle_guides_set_property; + object_class->get_property = gimp_canvas_rectangle_guides_get_property; + + item_class->draw = gimp_canvas_rectangle_guides_draw; + item_class->get_extents = gimp_canvas_rectangle_guides_get_extents; + + g_object_class_install_property (object_class, PROP_X, + g_param_spec_double ("x", NULL, NULL, + -GIMP_MAX_IMAGE_SIZE, + GIMP_MAX_IMAGE_SIZE, 0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_Y, + g_param_spec_double ("y", NULL, NULL, + -GIMP_MAX_IMAGE_SIZE, + GIMP_MAX_IMAGE_SIZE, 0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_WIDTH, + g_param_spec_double ("width", NULL, NULL, + -GIMP_MAX_IMAGE_SIZE, + GIMP_MAX_IMAGE_SIZE, 0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_HEIGHT, + g_param_spec_double ("height", NULL, NULL, + -GIMP_MAX_IMAGE_SIZE, + GIMP_MAX_IMAGE_SIZE, 0, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_TYPE, + g_param_spec_enum ("type", NULL, NULL, + GIMP_TYPE_GUIDES_TYPE, + GIMP_GUIDES_NONE, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_N_GUIDES, + g_param_spec_int ("n-guides", NULL, NULL, + 1, 128, 4, + GIMP_PARAM_READWRITE)); +} + +static void +gimp_canvas_rectangle_guides_init (GimpCanvasRectangleGuides *rectangle) +{ +} + +static void +gimp_canvas_rectangle_guides_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + GimpCanvasRectangleGuidesPrivate *private = GET_PRIVATE (object); + + switch (property_id) + { + case PROP_X: + private->x = g_value_get_double (value); + break; + case PROP_Y: + private->y = g_value_get_double (value); + break; + case PROP_WIDTH: + private->width = g_value_get_double (value); + break; + case PROP_HEIGHT: + private->height = g_value_get_double (value); + break; + case PROP_TYPE: + private->type = g_value_get_enum (value); + break; + case PROP_N_GUIDES: + private->n_guides = g_value_get_int (value); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_canvas_rectangle_guides_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + GimpCanvasRectangleGuidesPrivate *private = GET_PRIVATE (object); + + switch (property_id) + { + case PROP_X: + g_value_set_double (value, private->x); + break; + case PROP_Y: + g_value_set_double (value, private->y); + break; + case PROP_WIDTH: + g_value_set_double (value, private->width); + break; + case PROP_HEIGHT: + g_value_set_double (value, private->height); + break; + case PROP_TYPE: + g_value_set_enum (value, private->type); + break; + case PROP_N_GUIDES: + g_value_set_int (value, private->n_guides); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_canvas_rectangle_guides_transform (GimpCanvasItem *item, + gdouble *x1, + gdouble *y1, + gdouble *x2, + gdouble *y2) +{ + GimpCanvasRectangleGuidesPrivate *private = GET_PRIVATE (item); + + gimp_canvas_item_transform_xy_f (item, + MIN (private->x, + private->x + private->width), + MIN (private->y, + private->y + private->height), + x1, y1); + gimp_canvas_item_transform_xy_f (item, + MAX (private->x, + private->x + private->width), + MAX (private->y, + private->y + private->height), + x2, y2); + + *x1 = floor (*x1) + 0.5; + *y1 = floor (*y1) + 0.5; + *x2 = ceil (*x2) - 0.5; + *y2 = ceil (*y2) - 0.5; + + *x2 = MAX (*x1, *x2); + *y2 = MAX (*y1, *y2); +} + +static void +draw_hline (cairo_t *cr, + gdouble x1, + gdouble x2, + gdouble y) +{ + y = floor (y) + 0.5; + + cairo_move_to (cr, x1, y); + cairo_line_to (cr, x2, y); +} + +static void +draw_vline (cairo_t *cr, + gdouble y1, + gdouble y2, + gdouble x) +{ + x = floor (x) + 0.5; + + cairo_move_to (cr, x, y1); + cairo_line_to (cr, x, y2); +} + +static void +gimp_canvas_rectangle_guides_draw (GimpCanvasItem *item, + cairo_t *cr) +{ + GimpCanvasRectangleGuidesPrivate *private = GET_PRIVATE (item); + gdouble x1, y1; + gdouble x2, y2; + gint i; + + gimp_canvas_rectangle_guides_transform (item, &x1, &y1, &x2, &y2); + + switch (private->type) + { + case GIMP_GUIDES_NONE: + break; + + case GIMP_GUIDES_CENTER_LINES: + draw_hline (cr, x1, x2, (y1 + y2) / 2); + draw_vline (cr, y1, y2, (x1 + x2) / 2); + break; + + case GIMP_GUIDES_THIRDS: + draw_hline (cr, x1, x2, (2 * y1 + y2) / 3); + draw_hline (cr, x1, x2, ( y1 + 2 * y2) / 3); + + draw_vline (cr, y1, y2, (2 * x1 + x2) / 3); + draw_vline (cr, y1, y2, ( x1 + 2 * x2) / 3); + break; + + case GIMP_GUIDES_FIFTHS: + for (i = 0; i < 5; i++) + { + draw_hline (cr, x1, x2, y1 + i * (y2 - y1) / 5); + draw_vline (cr, y1, y2, x1 + i * (x2 - x1) / 5); + } + break; + + case GIMP_GUIDES_GOLDEN: + draw_hline (cr, x1, x2, (2 * y1 + (1 + SQRT5) * y2) / (3 + SQRT5)); + draw_hline (cr, x1, x2, ((1 + SQRT5) * y1 + 2 * y2) / (3 + SQRT5)); + + draw_vline (cr, y1, y2, (2 * x1 + (1 + SQRT5) * x2) / (3 + SQRT5)); + draw_vline (cr, y1, y2, ((1 + SQRT5) * x1 + 2 * x2) / (3 + SQRT5)); + break; + + /* This code implements the method of diagonals discovered by + * Edwin Westhoff - see http://www.diagonalmethod.info/ + */ + case GIMP_GUIDES_DIAGONALS: + { + /* the side of the largest square that can be + * fitted in whole into the rectangle (x1, y1), (x2, y2) + */ + const gdouble square_side = MIN (x2 - x1, y2 - y1); + + /* diagonal from the top-left edge */ + cairo_move_to (cr, x1, y1); + cairo_line_to (cr, x1 + square_side, y1 + square_side); + + /* diagonal from the top-right edge */ + cairo_move_to (cr, x2, y1); + cairo_line_to (cr, x2 - square_side, y1 + square_side); + + /* diagonal from the bottom-left edge */ + cairo_move_to (cr, x1, y2); + cairo_line_to (cr, x1 + square_side, y2 - square_side); + + /* diagonal from the bottom-right edge */ + cairo_move_to (cr, x2, y2); + cairo_line_to (cr, x2 - square_side, y2 - square_side); + } + break; + + case GIMP_GUIDES_N_LINES: + for (i = 0; i < private->n_guides; i++) + { + draw_hline (cr, x1, x2, y1 + i * (y2 - y1) / private->n_guides); + draw_vline (cr, y1, y2, x1 + i * (x2 - x1) / private->n_guides); + } + break; + + case GIMP_GUIDES_SPACING: + break; + } + + _gimp_canvas_item_stroke (item, cr); +} + +static cairo_region_t * +gimp_canvas_rectangle_guides_get_extents (GimpCanvasItem *item) +{ + GimpCanvasRectangleGuidesPrivate *private = GET_PRIVATE (item); + + if (private->type != GIMP_GUIDES_NONE) + { + cairo_rectangle_int_t rectangle; + gdouble x1, y1; + gdouble x2, y2; + + gimp_canvas_rectangle_guides_transform (item, &x1, &y1, &x2, &y2); + + rectangle.x = floor (x1 - 1.5); + rectangle.y = floor (y1 - 1.5); + rectangle.width = ceil (x2 - x1 + 3.0); + rectangle.height = ceil (y2 - y1 + 3.0); + + return cairo_region_create_rectangle (&rectangle); + } + + return NULL; +} + +GimpCanvasItem * +gimp_canvas_rectangle_guides_new (GimpDisplayShell *shell, + gdouble x, + gdouble y, + gdouble width, + gdouble height, + GimpGuidesType type, + gint n_guides) +{ + g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL); + + return g_object_new (GIMP_TYPE_CANVAS_RECTANGLE_GUIDES, + "shell", shell, + "x", x, + "y", y, + "width", width, + "height", height, + "type", type, + "n-guides", n_guides, + NULL); +} + +void +gimp_canvas_rectangle_guides_set (GimpCanvasItem *rectangle, + gdouble x, + gdouble y, + gdouble width, + gdouble height, + GimpGuidesType type, + gint n_guides) +{ + g_return_if_fail (GIMP_IS_CANVAS_RECTANGLE_GUIDES (rectangle)); + + gimp_canvas_item_begin_change (rectangle); + + g_object_set (rectangle, + "x", x, + "y", y, + "width", width, + "height", height, + "type", type, + "n-guides", n_guides, + NULL); + + gimp_canvas_item_end_change (rectangle); +} -- cgit v1.2.3