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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:30:19 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:30:19 +0000 |
commit | 5c1676dfe6d2f3c837a5e074117b45613fd29a72 (patch) | |
tree | cbffb45144febf451e54061db2b21395faf94bfe /app/display/gimpcanvasgrid.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/gimpcanvasgrid.c | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/app/display/gimpcanvasgrid.c b/app/display/gimpcanvasgrid.c new file mode 100644 index 0000000..23b46ee --- /dev/null +++ b/app/display/gimpcanvasgrid.c @@ -0,0 +1,414 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * gimpcanvasgrid.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 "libgimpconfig/gimpconfig.h" + +#include "display-types.h" + +#include "core/gimpgrid.h" +#include "core/gimpimage.h" + +#include "gimpcanvas-style.h" +#include "gimpcanvasgrid.h" +#include "gimpcanvasitem-utils.h" +#include "gimpdisplayshell.h" +#include "gimpdisplayshell-scale.h" + + +enum +{ + PROP_0, + PROP_GRID, + PROP_GRID_STYLE +}; + + +typedef struct _GimpCanvasGridPrivate GimpCanvasGridPrivate; + +struct _GimpCanvasGridPrivate +{ + GimpGrid *grid; + gboolean grid_style; +}; + +#define GET_PRIVATE(grid) \ + ((GimpCanvasGridPrivate *) gimp_canvas_grid_get_instance_private ((GimpCanvasGrid *) (grid))) + + +/* local function prototypes */ + +static void gimp_canvas_grid_finalize (GObject *object); +static void gimp_canvas_grid_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); +static void gimp_canvas_grid_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec); +static void gimp_canvas_grid_draw (GimpCanvasItem *item, + cairo_t *cr); +static cairo_region_t * gimp_canvas_grid_get_extents (GimpCanvasItem *item); +static void gimp_canvas_grid_stroke (GimpCanvasItem *item, + cairo_t *cr); + + +G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasGrid, gimp_canvas_grid, + GIMP_TYPE_CANVAS_ITEM) + +#define parent_class gimp_canvas_grid_parent_class + + +static void +gimp_canvas_grid_class_init (GimpCanvasGridClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass); + + object_class->finalize = gimp_canvas_grid_finalize; + object_class->set_property = gimp_canvas_grid_set_property; + object_class->get_property = gimp_canvas_grid_get_property; + + item_class->draw = gimp_canvas_grid_draw; + item_class->get_extents = gimp_canvas_grid_get_extents; + item_class->stroke = gimp_canvas_grid_stroke; + + g_object_class_install_property (object_class, PROP_GRID, + g_param_spec_object ("grid", NULL, NULL, + GIMP_TYPE_GRID, + GIMP_PARAM_READWRITE)); + + g_object_class_install_property (object_class, PROP_GRID_STYLE, + g_param_spec_boolean ("grid-style", + NULL, NULL, + FALSE, + GIMP_PARAM_READWRITE)); +} + +static void +gimp_canvas_grid_init (GimpCanvasGrid *grid) +{ + GimpCanvasGridPrivate *private = GET_PRIVATE (grid); + + private->grid = g_object_new (GIMP_TYPE_GRID, NULL); +} + +static void +gimp_canvas_grid_finalize (GObject *object) +{ + GimpCanvasGridPrivate *private = GET_PRIVATE (object); + + g_clear_object (&private->grid); + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static void +gimp_canvas_grid_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + GimpCanvasGridPrivate *private = GET_PRIVATE (object); + + switch (property_id) + { + case PROP_GRID: + { + GimpGrid *grid = g_value_get_object (value); + if (grid) + gimp_config_sync (G_OBJECT (grid), G_OBJECT (private->grid), 0); + } + break; + case PROP_GRID_STYLE: + private->grid_style = g_value_get_boolean (value); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_canvas_grid_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + GimpCanvasGridPrivate *private = GET_PRIVATE (object); + + switch (property_id) + { + case PROP_GRID: + g_value_set_object (value, private->grid); + break; + case PROP_GRID_STYLE: + g_value_set_boolean (value, private->grid_style); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_canvas_grid_draw (GimpCanvasItem *item, + cairo_t *cr) +{ + GimpCanvasGridPrivate *private = GET_PRIVATE (item); + GimpDisplayShell *shell = gimp_canvas_item_get_shell (item); + gdouble xspacing, yspacing; + gdouble xoffset, yoffset; + gboolean vert, horz; + gdouble dx1, dy1, dx2, dy2; + gint x1, y1, x2, y2; + gdouble dx, dy; + gint x, y; + +#define CROSSHAIR 2 + + gimp_grid_get_spacing (private->grid, &xspacing, &yspacing); + gimp_grid_get_offset (private->grid, &xoffset, &yoffset); + + g_return_if_fail (xspacing >= 0.0 && + yspacing >= 0.0); + + xspacing *= shell->scale_x; + yspacing *= shell->scale_y; + + xoffset *= shell->scale_x; + yoffset *= shell->scale_y; + + /* skip grid drawing when the space between grid lines starts + * disappearing, see bug #599267. + */ + vert = (xspacing >= 2.0); + horz = (yspacing >= 2.0); + + if (! vert && ! horz) + return; + + cairo_clip_extents (cr, &dx1, &dy1, &dx2, &dy2); + + x1 = floor (dx1) - 1; + y1 = floor (dy1) - 1; + x2 = ceil (dx2) + 1; + y2 = ceil (dy2) + 1; + + if (! gimp_display_shell_get_infinite_canvas (shell)) + { + GeglRectangle bounds; + + gimp_display_shell_scale_get_image_unrotated_bounds ( + shell, + &bounds.x, &bounds.y, &bounds.width, &bounds.height); + + if (! gegl_rectangle_intersect (&bounds, + &bounds, + GEGL_RECTANGLE (x1, y1, + x2 - x1, y2 - y1))) + { + return; + } + + x1 = bounds.x; + y1 = bounds.y; + x2 = bounds.x + bounds.width; + y2 = bounds.y + bounds.height; + } + + switch (gimp_grid_get_style (private->grid)) + { + case GIMP_GRID_INTERSECTIONS: + x1 -= CROSSHAIR; + y1 -= CROSSHAIR; + x2 += CROSSHAIR; + y2 += CROSSHAIR; + break; + + case GIMP_GRID_DOTS: + case GIMP_GRID_ON_OFF_DASH: + case GIMP_GRID_DOUBLE_DASH: + case GIMP_GRID_SOLID: + break; + } + + xoffset = fmod (xoffset - shell->offset_x - x1, xspacing); + yoffset = fmod (yoffset - shell->offset_y - y1, yspacing); + + if (xoffset < 0.0) + xoffset += xspacing; + + if (yoffset < 0.0) + yoffset += yspacing; + + switch (gimp_grid_get_style (private->grid)) + { + case GIMP_GRID_DOTS: + if (vert && horz) + { + for (dx = x1 + xoffset; dx <= x2; dx += xspacing) + { + x = RINT (dx); + + for (dy = y1 + yoffset; dy <= y2; dy += yspacing) + { + y = RINT (dy); + + cairo_move_to (cr, x, y + 0.5); + cairo_line_to (cr, x + 1.0, y + 0.5); + } + } + } + break; + + case GIMP_GRID_INTERSECTIONS: + if (vert && horz) + { + for (dx = x1 + xoffset; dx <= x2; dx += xspacing) + { + x = RINT (dx); + + for (dy = y1 + yoffset; dy <= y2; dy += yspacing) + { + y = RINT (dy); + + cairo_move_to (cr, x + 0.5, y - CROSSHAIR); + cairo_line_to (cr, x + 0.5, y + CROSSHAIR + 1.0); + + cairo_move_to (cr, x - CROSSHAIR, y + 0.5); + cairo_line_to (cr, x + CROSSHAIR + 1.0, y + 0.5); + } + } + } + break; + + case GIMP_GRID_ON_OFF_DASH: + case GIMP_GRID_DOUBLE_DASH: + case GIMP_GRID_SOLID: + if (vert) + { + for (dx = x1 + xoffset; dx < x2; dx += xspacing) + { + x = RINT (dx); + + cairo_move_to (cr, x + 0.5, y1); + cairo_line_to (cr, x + 0.5, y2); + } + } + + if (horz) + { + for (dy = y1 + yoffset; dy < y2; dy += yspacing) + { + y = RINT (dy); + + cairo_move_to (cr, x1, y + 0.5); + cairo_line_to (cr, x2, y + 0.5); + } + } + break; + } + + _gimp_canvas_item_stroke (item, cr); +} + +static cairo_region_t * +gimp_canvas_grid_get_extents (GimpCanvasItem *item) +{ + GimpDisplayShell *shell = gimp_canvas_item_get_shell (item); + GimpImage *image = gimp_canvas_item_get_image (item); + cairo_rectangle_int_t rectangle; + + if (! image) + return NULL; + + if (! gimp_display_shell_get_infinite_canvas (shell)) + { + + gdouble x1, y1; + gdouble x2, y2; + gint w, h; + + w = gimp_image_get_width (image); + h = gimp_image_get_height (image); + + gimp_canvas_item_transform_xy_f (item, 0, 0, &x1, &y1); + gimp_canvas_item_transform_xy_f (item, w, h, &x2, &y2); + + rectangle.x = floor (x1); + rectangle.y = floor (y1); + rectangle.width = ceil (x2) - rectangle.x; + rectangle.height = ceil (y2) - rectangle.y; + } + else + { + gimp_canvas_item_untransform_viewport (item, + &rectangle.x, + &rectangle.y, + &rectangle.width, + &rectangle.height); + } + + return cairo_region_create_rectangle (&rectangle); +} + +static void +gimp_canvas_grid_stroke (GimpCanvasItem *item, + cairo_t *cr) +{ + GimpCanvasGridPrivate *private = GET_PRIVATE (item); + + if (private->grid_style) + { + GimpDisplayShell *shell = gimp_canvas_item_get_shell (item); + + gimp_canvas_set_grid_style (gimp_canvas_item_get_canvas (item), cr, + private->grid, + shell->offset_x, shell->offset_y); + cairo_stroke (cr); + } + else + { + GIMP_CANVAS_ITEM_CLASS (parent_class)->stroke (item, cr); + } +} + +GimpCanvasItem * +gimp_canvas_grid_new (GimpDisplayShell *shell, + GimpGrid *grid) +{ + g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL); + g_return_val_if_fail (grid == NULL || GIMP_IS_GRID (grid), NULL); + + return g_object_new (GIMP_TYPE_CANVAS_GRID, + "shell", shell, + "grid", grid, + NULL); +} |