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gimp/app/tools/gimpcolortool.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
*
* 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 "libgimpcolor/gimpcolor.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "config/gimpdisplayconfig.h"
#include "core/gimp.h"
#include "core/gimpdata.h"
#include "core/gimpimage.h"
#include "core/gimpimage-pick-color.h"
#include "core/gimpimage-pick-item.h"
#include "core/gimpimage-sample-points.h"
#include "core/gimpmarshal.h"
#include "core/gimpsamplepoint.h"
#include "widgets/gimpcolormapeditor.h"
#include "widgets/gimpdialogfactory.h"
#include "widgets/gimpdockable.h"
#include "widgets/gimpdockcontainer.h"
#include "widgets/gimppaletteeditor.h"
#include "widgets/gimpwidgets-utils.h"
#include "widgets/gimpwindowstrategy.h"
#include "display/gimpcanvasitem.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-appearance.h"
#include "gimpcoloroptions.h"
#include "gimpcolortool.h"
#include "gimpsamplepointtool.h"
#include "gimptoolcontrol.h"
#include "gimp-intl.h"
enum
{
PICKED,
LAST_SIGNAL
};
/* local function prototypes */
static void gimp_color_tool_finalize (GObject *object);
static void gimp_color_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display);
static void gimp_color_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display);
static void gimp_color_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display);
static void gimp_color_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display);
static void gimp_color_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display);
static void gimp_color_tool_draw (GimpDrawTool *draw_tool);
static gboolean
gimp_color_tool_real_can_pick (GimpColorTool *color_tool,
const GimpCoords *coords,
GimpDisplay *display);
static gboolean gimp_color_tool_real_pick (GimpColorTool *color_tool,
const GimpCoords *coords,
GimpDisplay *display,
const Babl **sample_format,
gpointer pixel,
GeglColor **color);
static void gimp_color_tool_real_picked (GimpColorTool *color_tool,
const GimpCoords *coords,
GimpDisplay *display,
GimpColorPickState pick_state,
const Babl *sample_format,
gpointer pixel,
GeglColor *color);
static gboolean gimp_color_tool_can_pick (GimpColorTool *tool,
const GimpCoords *coords,
GimpDisplay *display);
static void gimp_color_tool_pick (GimpColorTool *tool,
const GimpCoords *coords,
GimpDisplay *display,
GimpColorPickState pick_state);
G_DEFINE_TYPE (GimpColorTool, gimp_color_tool, GIMP_TYPE_DRAW_TOOL)
#define parent_class gimp_color_tool_parent_class
static guint gimp_color_tool_signals[LAST_SIGNAL] = { 0 };
static void
gimp_color_tool_class_init (GimpColorToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
GimpDrawToolClass *draw_class = GIMP_DRAW_TOOL_CLASS (klass);
gimp_color_tool_signals[PICKED] =
g_signal_new ("picked",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpColorToolClass, picked),
NULL, NULL,
gimp_marshal_VOID__POINTER_OBJECT_ENUM_POINTER_POINTER_BOXED,
G_TYPE_NONE, 6,
G_TYPE_POINTER,
GIMP_TYPE_DISPLAY,
GIMP_TYPE_COLOR_PICK_STATE,
G_TYPE_POINTER,
G_TYPE_POINTER,
GEGL_TYPE_COLOR);
object_class->finalize = gimp_color_tool_finalize;
tool_class->button_press = gimp_color_tool_button_press;
tool_class->button_release = gimp_color_tool_button_release;
tool_class->motion = gimp_color_tool_motion;
tool_class->oper_update = gimp_color_tool_oper_update;
tool_class->cursor_update = gimp_color_tool_cursor_update;
draw_class->draw = gimp_color_tool_draw;
klass->can_pick = gimp_color_tool_real_can_pick;
klass->pick = gimp_color_tool_real_pick;
klass->picked = gimp_color_tool_real_picked;
}
static void
gimp_color_tool_init (GimpColorTool *color_tool)
{
GimpTool *tool = GIMP_TOOL (color_tool);
gimp_tool_control_set_action_size (tool->control,
"tools-color-average-radius-set");
}
static void
gimp_color_tool_finalize (GObject *object)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (object);
g_clear_object (&color_tool->options);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_color_tool_button_press (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonPressType press_type,
GimpDisplay *display)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (tool);
if (color_tool->enabled)
{
if (color_tool->sample_point)
{
gimp_sample_point_tool_start_edit (tool, display,
color_tool->sample_point);
}
else if (gimp_color_tool_can_pick (color_tool, coords, display))
{
gimp_color_tool_pick (color_tool, coords, display,
GIMP_COLOR_PICK_STATE_START);
gimp_tool_control_activate (tool->control);
}
}
else
{
GIMP_TOOL_CLASS (parent_class)->button_press (tool, coords, time, state,
press_type, display);
}
}
static void
gimp_color_tool_button_release (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpButtonReleaseType release_type,
GimpDisplay *display)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (tool);
if (color_tool->enabled)
{
gimp_tool_control_halt (tool->control);
if (! color_tool->sample_point &&
gimp_color_tool_can_pick (color_tool, coords, display))
{
gimp_color_tool_pick (color_tool, coords, display,
GIMP_COLOR_PICK_STATE_END);
}
}
else
{
GIMP_TOOL_CLASS (parent_class)->button_release (tool, coords, time, state,
release_type, display);
}
}
static void
gimp_color_tool_motion (GimpTool *tool,
const GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *display)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (tool);
if (color_tool->enabled)
{
if (! color_tool->sample_point)
{
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
color_tool->can_pick = gimp_color_tool_can_pick (color_tool,
coords, display);
color_tool->center_x = coords->x;
color_tool->center_y = coords->y;
if (color_tool->can_pick)
{
gimp_color_tool_pick (color_tool, coords, display,
GIMP_COLOR_PICK_STATE_UPDATE);
}
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
}
else
{
GIMP_TOOL_CLASS (parent_class)->motion (tool, coords, time, state,
display);
}
}
static void
gimp_color_tool_oper_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
gboolean proximity,
GimpDisplay *display)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (tool);
if (color_tool->enabled)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpSamplePoint *sample_point = NULL;
gimp_draw_tool_pause (draw_tool);
if (! draw_tool->widget &&
gimp_draw_tool_is_active (draw_tool) &&
(draw_tool->display != display ||
! proximity))
{
gimp_draw_tool_stop (draw_tool);
}
if (gimp_display_shell_get_show_sample_points (shell) &&
proximity)
{
GimpImage *image = gimp_display_get_image (display);
gint snap_distance = display->config->snap_distance;
sample_point =
gimp_image_pick_sample_point (image,
coords->x, coords->y,
FUNSCALEX (shell, snap_distance),
FUNSCALEY (shell, snap_distance));
}
color_tool->sample_point = sample_point;
color_tool->can_pick = gimp_color_tool_can_pick (color_tool,
coords, display);
color_tool->center_x = coords->x;
color_tool->center_y = coords->y;
if (! draw_tool->widget &&
! gimp_draw_tool_is_active (draw_tool) &&
proximity)
{
gimp_draw_tool_start (draw_tool, display);
}
gimp_draw_tool_resume (draw_tool);
}
else
{
GIMP_TOOL_CLASS (parent_class)->oper_update (tool, coords, state,
proximity, display);
}
}
static void
gimp_color_tool_cursor_update (GimpTool *tool,
const GimpCoords *coords,
GdkModifierType state,
GimpDisplay *display)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (tool);
if (color_tool->enabled)
{
if (color_tool->sample_point)
{
gimp_tool_set_cursor (tool, display,
GIMP_CURSOR_MOUSE,
GIMP_TOOL_CURSOR_COLOR_PICKER,
GIMP_CURSOR_MODIFIER_MOVE);
}
else
{
GimpCursorModifier modifier = GIMP_CURSOR_MODIFIER_BAD;
if (gimp_color_tool_can_pick (color_tool, coords, display))
{
switch (color_tool->pick_target)
{
case GIMP_COLOR_PICK_TARGET_NONE:
modifier = GIMP_CURSOR_MODIFIER_NONE;
break;
case GIMP_COLOR_PICK_TARGET_FOREGROUND:
modifier = GIMP_CURSOR_MODIFIER_FOREGROUND;
break;
case GIMP_COLOR_PICK_TARGET_BACKGROUND:
modifier = GIMP_CURSOR_MODIFIER_BACKGROUND;
break;
case GIMP_COLOR_PICK_TARGET_PALETTE:
modifier = GIMP_CURSOR_MODIFIER_PLUS;
break;
}
}
gimp_tool_set_cursor (tool, display,
GIMP_CURSOR_COLOR_PICKER,
GIMP_TOOL_CURSOR_COLOR_PICKER,
modifier);
}
}
else
{
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state,
display);
}
}
static void
gimp_color_tool_draw (GimpDrawTool *draw_tool)
{
GimpColorTool *color_tool = GIMP_COLOR_TOOL (draw_tool);
GIMP_DRAW_TOOL_CLASS (parent_class)->draw (draw_tool);
if (color_tool->enabled)
{
if (color_tool->sample_point)
{
GimpImage *image = gimp_display_get_image (draw_tool->display);
GimpCanvasItem *item;
gint index;
gint x;
gint y;
gimp_sample_point_get_position (color_tool->sample_point, &x, &y);
index = g_list_index (gimp_image_get_sample_points (image),
color_tool->sample_point) + 1;
item = gimp_draw_tool_add_sample_point (draw_tool, x, y, index);
gimp_canvas_item_set_highlight (item, TRUE);
}
else if (color_tool->can_pick && color_tool->options->sample_average)
{
gdouble radius = color_tool->options->average_radius;
gimp_draw_tool_add_rectangle (draw_tool,
FALSE,
color_tool->center_x - radius,
color_tool->center_y - radius,
2 * radius + 1,
2 * radius + 1);
}
}
}
static gboolean
gimp_color_tool_real_can_pick (GimpColorTool *color_tool,
const GimpCoords *coords,
GimpDisplay *display)
{
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImage *image = gimp_display_get_image (display);
return gimp_image_coords_in_active_pickable (image, coords,
shell->show_all,
color_tool->options->sample_merged,
FALSE);
}
static gboolean
gimp_color_tool_real_pick (GimpColorTool *color_tool,
const GimpCoords *coords,
GimpDisplay *display,
const Babl **sample_format,
gpointer pixel,
GeglColor **color)
{
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImage *image = gimp_display_get_image (display);
GList *drawables = gimp_image_get_selected_drawables (image);
g_return_val_if_fail (drawables != NULL, FALSE);
g_return_val_if_fail (color != NULL && GEGL_IS_COLOR (*color), FALSE);
return gimp_image_pick_color (image, drawables,
coords->x, coords->y,
shell->show_all,
color_tool->options->sample_merged,
color_tool->options->sample_average,
color_tool->options->average_radius,
sample_format,
pixel,
color);
}
static void
gimp_color_tool_real_picked (GimpColorTool *color_tool,
const GimpCoords *coords,
GimpDisplay *display,
GimpColorPickState pick_state,
const Babl *sample_format,
gpointer pixel,
GeglColor *color)
{
GimpTool *tool = GIMP_TOOL (color_tool);
GimpDisplayShell *shell = gimp_display_get_shell (display);
GimpImageWindow *image_window;
GimpDialogFactory *dialog_factory;
GimpContext *context;
g_return_if_fail (GEGL_IS_COLOR (color));
image_window = gimp_display_shell_get_window (shell);
dialog_factory = gimp_dock_container_get_dialog_factory (GIMP_DOCK_CONTAINER (image_window));
/* use this tool's own options here (NOT color_tool->options) */
context = GIMP_CONTEXT (gimp_tool_get_options (tool));
if (color_tool->pick_target == GIMP_COLOR_PICK_TARGET_FOREGROUND ||
color_tool->pick_target == GIMP_COLOR_PICK_TARGET_BACKGROUND)
{
GtkWidget *widget;
widget = gimp_dialog_factory_find_widget (dialog_factory,
"gimp-indexed-palette");
if (widget)
{
GtkWidget *editor = gtk_bin_get_child (GTK_BIN (widget));
GimpImage *image = gimp_display_get_image (display);
if (babl_format_is_palette (sample_format))
{
guchar *index = pixel;
gimp_colormap_editor_set_index (GIMP_COLORMAP_EDITOR (editor),
*index, NULL);
}
else if (gimp_image_get_base_type (image) == GIMP_INDEXED)
{
/* When Sample merged is set, we don't have the index
* information and it is possible to pick colors out of
* the colormap (with compositing). In such a case, the
* sample format will not be a palette format even though
* the image is indexed. Still search if the color exists
* in the colormap.
* Note that even if it does, we might still pick the
* wrong color, since several indexes may contain the same
* color and we can't know for sure which is the right
* one.
*/
gint index = gimp_colormap_editor_get_index (GIMP_COLORMAP_EDITOR (editor),
color);
if (index > -1)
gimp_colormap_editor_set_index (GIMP_COLORMAP_EDITOR (editor),
index, NULL);
}
}
widget = gimp_dialog_factory_find_widget (dialog_factory,
"gimp-palette-editor");
if (widget)
{
GtkWidget *editor = gtk_bin_get_child (GTK_BIN (widget));
gint index;
index = gimp_palette_editor_get_index (GIMP_PALETTE_EDITOR (editor),
color);
if (index != -1)
gimp_palette_editor_set_index (GIMP_PALETTE_EDITOR (editor),
index, NULL);
}
}
switch (color_tool->pick_target)
{
case GIMP_COLOR_PICK_TARGET_NONE:
break;
case GIMP_COLOR_PICK_TARGET_FOREGROUND:
gimp_context_set_foreground (context, color);
break;
case GIMP_COLOR_PICK_TARGET_BACKGROUND:
gimp_context_set_background (context, color);
break;
case GIMP_COLOR_PICK_TARGET_PALETTE:
{
GdkMonitor *monitor = gimp_widget_get_monitor (GTK_WIDGET (shell));
GtkWidget *dockable;
dockable =
gimp_window_strategy_show_dockable_dialog (GIMP_WINDOW_STRATEGY (gimp_get_window_strategy (display->gimp)),
display->gimp,
dialog_factory,
monitor,
"gimp-palette-editor");
if (dockable)
{
GtkWidget *palette_editor;
GimpData *data;
/* don't blink like mad when updating */
if (pick_state != GIMP_COLOR_PICK_STATE_START)
gimp_widget_blink_cancel (dockable);
palette_editor = gtk_bin_get_child (GTK_BIN (dockable));
data = gimp_data_editor_get_data (GIMP_DATA_EDITOR (palette_editor));
if (! data)
{
data = GIMP_DATA (gimp_context_get_palette (context));
gimp_data_editor_set_data (GIMP_DATA_EDITOR (palette_editor),
data);
}
gimp_palette_editor_pick_color (GIMP_PALETTE_EDITOR (palette_editor),
color, pick_state);
}
}
break;
}
}
static gboolean
gimp_color_tool_can_pick (GimpColorTool *tool,
const GimpCoords *coords,
GimpDisplay *display)
{
GimpColorToolClass *klass;
klass = GIMP_COLOR_TOOL_GET_CLASS (tool);
return klass->can_pick && klass->can_pick (tool, coords, display);
}
static void
gimp_color_tool_pick (GimpColorTool *tool,
const GimpCoords *coords,
GimpDisplay *display,
GimpColorPickState pick_state)
{
GimpColorToolClass *klass;
const Babl *sample_format;
gdouble pixel[4];
GeglColor *color;
klass = GIMP_COLOR_TOOL_GET_CLASS (tool);
color = gegl_color_new ("black");
if (klass->pick &&
klass->pick (tool, coords, display, &sample_format, pixel, &color))
g_signal_emit (tool, gimp_color_tool_signals[PICKED], 0,
coords, display, pick_state,
sample_format, pixel, color);
g_object_unref (color);
}
/* public functions */
void
gimp_color_tool_enable (GimpColorTool *color_tool,
GimpColorOptions *options)
{
GimpTool *tool;
g_return_if_fail (GIMP_IS_COLOR_TOOL (color_tool));
g_return_if_fail (GIMP_IS_COLOR_OPTIONS (options));
tool = GIMP_TOOL (color_tool);
if (gimp_tool_control_is_active (tool->control))
{
g_warning ("Trying to enable GimpColorTool while it is active.");
return;
}
g_set_object (&color_tool->options, options);
/* color picking doesn't snap, see bug #768058 */
color_tool->saved_snap_to = gimp_tool_control_get_snap_to (tool->control);
gimp_tool_control_set_snap_to (tool->control, FALSE);
color_tool->enabled = TRUE;
}
void
gimp_color_tool_disable (GimpColorTool *color_tool)
{
GimpTool *tool;
g_return_if_fail (GIMP_IS_COLOR_TOOL (color_tool));
tool = GIMP_TOOL (color_tool);
if (gimp_tool_control_is_active (tool->control))
{
g_warning ("Trying to disable GimpColorTool while it is active.");
return;
}
g_clear_object (&color_tool->options);
gimp_tool_control_set_snap_to (tool->control, color_tool->saved_snap_to);
color_tool->saved_snap_to = FALSE;
color_tool->enabled = FALSE;
}
gboolean
gimp_color_tool_is_enabled (GimpColorTool *color_tool)
{
return color_tool->enabled;
}
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