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901b8c1ed4338ffd3008bf79443ee0d7e5de82da
gimp/app/tools/gimpfliptool.c
Jehan 647ebffe7b app: GimpTransformTool multi-layer aware. 
This implied a lot of other core changes, which also pushed me into
improving some of the edit actions and PDB calls to be multi-layer aware
in the same time.

Note that it is still work-in-progress, but I just had to commit
something in an acceptable intermediate state otherwise I was just going
crazy.

In particular now the various transform tools are multi-layer aware and
work simultaneously on all selected layers (and the linked layers if any
of the selected layers is linked too). Both preview and final transform
processing works.
In the limitations, preview doesn't work well (only one layer in the
preview) when there is a selection (though the actual transform works).

Also I am left to wonder how we should process this case of canvas
selection+transform on multi-layers. Indeed currently I am just creating
a floating selection (like we used to for the selection+transform case)
containing a transform result of the composited version of all selected
layers. This is a possible expected result, but another could be to get
several transformed layers (without composition). But then should the
"Floating Selection" concept allow for multiple Floating Selections?
Sooo many questions left to answer.
2020-05-28 14:28:01 +02:00

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "config/gimpdisplayconfig.h"
#include "core/gimpdrawable-transform.h"
#include "core/gimpguide.h"
#include "core/gimpimage.h"
#include "core/gimpimage-flip.h"
#include "core/gimpimage-pick-item.h"
#include "core/gimpitem-linked.h"
#include "core/gimplayer.h"
#include "core/gimplayermask.h"
#include "core/gimppickable.h"
#include "core/gimpprogress.h"
#include "widgets/gimphelp-ids.h"
#include "widgets/gimpwidgets-utils.h"
#include "display/gimpcanvasitem.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-appearance.h"
#include "gimpflipoptions.h"
#include "gimpfliptool.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.h"
/* local function prototypes */
static void gimp_flip_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display);
static void gimp_flip_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display);
static void gimp_flip_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display);
static void gimp_flip_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display);
static void gimp_flip_tool_draw (GimpDrawTool *draw_tool);
static gchar * gimp_flip_tool_get_undo_desc (GimpTransformTool *tr_tool);
static GeglBuffer * gimp_flip_tool_transform (GimpTransformTool *tr_tool,
GList *objects,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y);
static GimpOrientationType gimp_flip_tool_get_flip_type (GimpFlipTool *flip);
G_DEFINE_TYPE (GimpFlipTool, gimp_flip_tool, GIMP_TYPE_TRANSFORM_TOOL)
#define parent_class gimp_flip_tool_parent_class
void
gimp_flip_tool_register (GimpToolRegisterCallback callback,
gpointer data)
{
(* callback) (GIMP_TYPE_FLIP_TOOL,
GIMP_TYPE_FLIP_OPTIONS,
gimp_flip_options_gui,
GIMP_CONTEXT_PROP_MASK_BACKGROUND,
"gimp-flip-tool",
_("Flip"),
_("Flip Tool: "
"Reverse the layer, selection or path horizontally or vertically"),
N_("_Flip"), "<shift>F",
NULL, GIMP_HELP_TOOL_FLIP,
GIMP_ICON_TOOL_FLIP,
data);
}
static void
gimp_flip_tool_class_init (GimpFlipToolClass *klass)
{
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
GimpTransformToolClass *tr_class = GIMP_TRANSFORM_TOOL_CLASS (klass);
tool_class->button_press = gimp_flip_tool_button_press;
tool_class->modifier_key = gimp_flip_tool_modifier_key;
tool_class->oper_update = gimp_flip_tool_oper_update;
tool_class->cursor_update = gimp_flip_tool_cursor_update;
draw_tool_class->draw = gimp_flip_tool_draw;
tr_class->get_undo_desc = gimp_flip_tool_get_undo_desc;
tr_class->transform = gimp_flip_tool_transform;
tr_class->undo_desc = C_("undo-type", "Flip");
tr_class->progress_text = _("Flipping");
}
static void
gimp_flip_tool_init (GimpFlipTool *flip_tool)
{
GimpTool *tool = GIMP_TOOL (flip_tool);
gimp_tool_control_set_snap_to (tool->control, FALSE);
gimp_tool_control_set_precision (tool->control,
GIMP_CURSOR_PRECISION_PIXEL_CENTER);
gimp_tool_control_set_cursor (tool->control, GIMP_CURSOR_MOUSE);
gimp_tool_control_set_toggle_cursor (tool->control, GIMP_CURSOR_MOUSE);
gimp_tool_control_set_tool_cursor (tool->control,
GIMP_TOOL_CURSOR_FLIP_HORIZONTAL);
gimp_tool_control_set_toggle_tool_cursor (tool->control,
GIMP_TOOL_CURSOR_FLIP_VERTICAL);
flip_tool->guide = NULL;
}
static void
gimp_flip_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
tool->display = display;
gimp_transform_tool_transform (tr_tool, display);
gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);
}
static void
gimp_flip_tool_modifier_key (GimpTool *tool,
GdkModifierType key,
gboolean press,
GdkModifierType state,
GimpDisplay *display)
{
GimpFlipOptions *options = GIMP_FLIP_TOOL_GET_OPTIONS (tool);
if (key == gimp_get_toggle_behavior_mask ())
{
switch (options->flip_type)
{
case GIMP_ORIENTATION_HORIZONTAL:
g_object_set (options,
"flip-type", GIMP_ORIENTATION_VERTICAL,
NULL);
break;
case GIMP_ORIENTATION_VERTICAL:
g_object_set (options,
"flip-type", GIMP_ORIENTATION_HORIZONTAL,
NULL);
break;
default:
break;
}
}
}
static void
gimp_flip_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display)
{
GimpFlipTool *flip = GIMP_FLIP_TOOL (tool);
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
GimpFlipOptions *options = GIMP_FLIP_TOOL_GET_OPTIONS (tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImage *image = gimp_display_get_image (display);
GimpGuide *guide = NULL;
if (gimp_display_shell_get_show_guides (shell) &&
proximity)
{
gint snap_distance = display->config->snap_distance;
guide = gimp_image_pick_guide (image, coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance));
}
if (flip->guide != guide ||
(guide && ! gimp_draw_tool_is_active (draw_tool)))
{
gimp_draw_tool_pause (draw_tool);
if (gimp_draw_tool_is_active (draw_tool) &&
draw_tool->display != display)
gimp_draw_tool_stop (draw_tool);
flip->guide = guide;
if (! gimp_draw_tool_is_active (draw_tool))
gimp_draw_tool_start (draw_tool, display);
gimp_draw_tool_resume (draw_tool);
}
gtk_widget_set_sensitive (options->direction_frame, guide == NULL);
GIMP_TOOL_CLASS (parent_class)->oper_update (tool,
coords, state, proximity,
display);
}
static void
gimp_flip_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display)
{
GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
GimpFlipTool *flip = GIMP_FLIP_TOOL (tool);
GList *selected_objects;
selected_objects = gimp_transform_tool_check_selected_objects (tr_tool, display, NULL);
if (! selected_objects)
{
gimp_tool_set_cursor (tool, display,
gimp_tool_control_get_cursor (tool->control),
gimp_tool_control_get_tool_cursor (tool->control),
GIMP_CURSOR_MODIFIER_BAD);
return;
}
g_list_free (selected_objects);
gimp_tool_control_set_toggled (tool->control,
gimp_flip_tool_get_flip_type (flip) ==
GIMP_ORIENTATION_VERTICAL);
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, display);
}
static void
gimp_flip_tool_draw (GimpDrawTool *draw_tool)
{
GimpFlipTool *flip = GIMP_FLIP_TOOL (draw_tool);
if (flip->guide)
{
GimpCanvasItem *item;
GimpGuideStyle style;
style = gimp_guide_get_style (flip->guide);
item = gimp_draw_tool_add_guide (draw_tool,
gimp_guide_get_orientation (flip->guide),
gimp_guide_get_position (flip->guide),
style);
gimp_canvas_item_set_highlight (item, TRUE);
}
}
static gchar *
gimp_flip_tool_get_undo_desc (GimpTransformTool *tr_tool)
{
GimpFlipTool *flip = GIMP_FLIP_TOOL (tr_tool);
switch (gimp_flip_tool_get_flip_type (flip))
{
case GIMP_ORIENTATION_HORIZONTAL:
return g_strdup (C_("undo-type", "Flip horizontally"));
case GIMP_ORIENTATION_VERTICAL:
return g_strdup (C_("undo-type", "Flip vertically"));
default:
/* probably this is not actually reached today, but
* could be if someone defined FLIP_DIAGONAL, say...
*/
return GIMP_TRANSFORM_TOOL_CLASS (parent_class)->get_undo_desc (tr_tool);
}
}
static GeglBuffer *
gimp_flip_tool_transform (GimpTransformTool *tr_tool,
GList *objects,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y)
{
GimpFlipTool *flip = GIMP_FLIP_TOOL (tr_tool);
GimpFlipOptions *options = GIMP_FLIP_TOOL_GET_OPTIONS (tr_tool);
GimpTransformOptions *tr_options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
GimpContext *context = GIMP_CONTEXT (options);
GimpOrientationType flip_type = GIMP_ORIENTATION_UNKNOWN;
gdouble axis = 0.0;
gboolean clip_result = FALSE;
GeglBuffer *ret = NULL;
flip_type = gimp_flip_tool_get_flip_type (flip);
if (flip->guide)
{
axis = gimp_guide_get_position (flip->guide);
}
else
{
switch (flip_type)
{
case GIMP_ORIENTATION_HORIZONTAL:
axis = ((gdouble) tr_tool->x1 +
(gdouble) (tr_tool->x2 - tr_tool->x1) / 2.0);
break;
case GIMP_ORIENTATION_VERTICAL:
axis = ((gdouble) tr_tool->y1 +
(gdouble) (tr_tool->y2 - tr_tool->y1) / 2.0);
break;
default:
break;
}
}
switch (tr_options->clip)
{
case GIMP_TRANSFORM_RESIZE_ADJUST:
clip_result = FALSE;
break;
case GIMP_TRANSFORM_RESIZE_CLIP:
clip_result = TRUE;
break;
default:
g_return_val_if_reached (NULL);
}
if (orig_buffer)
{
/* this happens when transforming a selection cut out of a
* normal drawable
*/
g_return_val_if_fail (GIMP_IS_DRAWABLE (objects->data), NULL);
ret = gimp_drawable_transform_buffer_flip (GIMP_DRAWABLE (objects->data),
context,
orig_buffer,
orig_offset_x,
orig_offset_y,
flip_type, axis,
clip_result,
buffer_profile,
new_offset_x,
new_offset_y);
}
else if (g_list_length (objects) == 1 && GIMP_IS_IMAGE (objects->data))
{
/* this happens for images */
GimpTransformToolClass *tr_class = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool);
GimpProgress *progress;
progress = gimp_progress_start (GIMP_PROGRESS (tr_tool), FALSE,
"%s", tr_class->progress_text);
gimp_image_flip_full (GIMP_IMAGE (objects->data), context,
flip_type, axis, clip_result,
progress);
if (progress)
gimp_progress_end (progress);
}
else
{
/* this happens for entire drawables, paths and layer groups */
GList *iter;
for (iter = objects; iter; iter = iter->next)
{
GimpItem *item;
g_return_val_if_fail (GIMP_IS_ITEM (iter->data), NULL);
item = GIMP_ITEM (iter->data);
if (gimp_item_get_linked (item))
{
gimp_item_linked_flip (item, context,
flip_type, axis, clip_result);
}
else
{
clip_result = gimp_item_get_clip (item, clip_result);
gimp_item_flip (item, context,
flip_type, axis, clip_result);
}
}
}
return ret;
}
static GimpOrientationType
gimp_flip_tool_get_flip_type (GimpFlipTool *flip)
{
GimpFlipOptions *options = GIMP_FLIP_TOOL_GET_OPTIONS (flip);
if (flip->guide)
{
switch (gimp_guide_get_orientation (flip->guide))
{
case GIMP_ORIENTATION_HORIZONTAL:
return GIMP_ORIENTATION_VERTICAL;
case GIMP_ORIENTATION_VERTICAL:
return GIMP_ORIENTATION_HORIZONTAL;
default:
return gimp_guide_get_orientation (flip->guide);
}
}
else
{
return options->flip_type;
}
}
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