1 /* GIMP - The GNU Image Manipulation Program
2 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
3 *
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 3 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <https://www.gnu.org/licenses/>.
16 */
17
18 #include "config.h"
19
20 #include <gegl.h>
21 #include <gtk/gtk.h>
22
23 #include "libgimpbase/gimpbase.h"
24 #include "libgimpmath/gimpmath.h"
25 #include "libgimpconfig/gimpconfig.h"
26 #include "libgimpwidgets/gimpwidgets.h"
27
28 #include "tools-types.h"
29
30 #include "gegl/gimp-babl.h"
31
32 #include "operations/gimplevelsconfig.h"
33 #include "operations/gimpoperationlevels.h"
34
35 #include "core/gimp-gui.h"
36 #include "core/gimpasync.h"
37 #include "core/gimpcancelable.h"
38 #include "core/gimpdrawable.h"
39 #include "core/gimpdrawable-histogram.h"
40 #include "core/gimperror.h"
41 #include "core/gimphistogram.h"
42 #include "core/gimpimage.h"
43 #include "core/gimptoolinfo.h"
44 #include "core/gimptriviallycancelablewaitable.h"
45 #include "core/gimpwaitable.h"
46
47 #include "widgets/gimpcolorbar.h"
48 #include "widgets/gimphandlebar.h"
49 #include "widgets/gimphelp-ids.h"
50 #include "widgets/gimphistogramview.h"
51 #include "widgets/gimppropwidgets.h"
52 #include "widgets/gimpwidgets-constructors.h"
53
54 #include "display/gimpdisplay.h"
55
56 #include "gimphistogramoptions.h"
57 #include "gimplevelstool.h"
58
59 #include "gimp-intl.h"
60
61
62 #define PICK_LOW_INPUT (1 << 0)
63 #define PICK_GAMMA (1 << 1)
64 #define PICK_HIGH_INPUT (1 << 2)
65 #define PICK_ALL_CHANNELS (1 << 8)
66
67 #define HISTOGRAM_WIDTH 256
68 #define GRADIENT_HEIGHT 12
69 #define CONTROL_HEIGHT 10
70
71
72 /* local function prototypes */
73
74 static void gimp_levels_tool_finalize (GObject *object);
75
76 static gboolean gimp_levels_tool_initialize (GimpTool *tool,
77 GimpDisplay *display,
78 GError **error);
79
80 static gchar * gimp_levels_tool_get_operation (GimpFilterTool *filter_tool,
81 gchar **description);
82 static void gimp_levels_tool_dialog (GimpFilterTool *filter_tool);
83 static void gimp_levels_tool_reset (GimpFilterTool *filter_tool);
84 static void gimp_levels_tool_config_notify (GimpFilterTool *filter_tool,
85 GimpConfig *config,
86 const GParamSpec *pspec);
87 static gboolean gimp_levels_tool_settings_import(GimpFilterTool *filter_tool,
88 GInputStream *input,
89 GError **error);
90 static gboolean gimp_levels_tool_settings_export(GimpFilterTool *filter_tool,
91 GOutputStream *output,
92 GError **error);
93 static void gimp_levels_tool_color_picked (GimpFilterTool *filter_tool,
94 gpointer identifier,
95 gdouble x,
96 gdouble y,
97 const Babl *sample_format,
98 const GimpRGB *color);
99
100 static void gimp_levels_tool_export_setup (GimpSettingsBox *settings_box,
101 GtkFileChooserDialog *dialog,
102 gboolean export,
103 GimpLevelsTool *tool);
104
105 static void levels_update_input_bar (GimpLevelsTool *tool);
106
107 static void levels_channel_callback (GtkWidget *widget,
108 GimpFilterTool *filter_tool);
109 static void levels_channel_reset_callback (GtkWidget *widget,
110 GimpFilterTool *filter_tool);
111
112 static gboolean levels_menu_sensitivity (gint value,
113 gpointer data);
114
115 static void levels_stretch_callback (GtkWidget *widget,
116 GimpLevelsTool *tool);
117 static void levels_linear_gamma_changed (GtkAdjustment *adjustment,
118 GimpLevelsTool *tool);
119
120 static void levels_to_curves_callback (GtkWidget *widget,
121 GimpFilterTool *filter_tool);
122
123
G_DEFINE_TYPE(GimpLevelsTool,gimp_levels_tool,GIMP_TYPE_FILTER_TOOL)124 G_DEFINE_TYPE (GimpLevelsTool, gimp_levels_tool, GIMP_TYPE_FILTER_TOOL)
125
126 #define parent_class gimp_levels_tool_parent_class
127
128
129 void
130 gimp_levels_tool_register (GimpToolRegisterCallback callback,
131 gpointer data)
132 {
133 (* callback) (GIMP_TYPE_LEVELS_TOOL,
134 GIMP_TYPE_HISTOGRAM_OPTIONS,
135 gimp_color_options_gui,
136 0,
137 "gimp-levels-tool",
138 _("Levels"),
139 _("Adjust color levels"),
140 N_("_Levels..."), NULL,
141 NULL, GIMP_HELP_TOOL_LEVELS,
142 GIMP_ICON_TOOL_LEVELS,
143 data);
144 }
145
146 static void
gimp_levels_tool_class_init(GimpLevelsToolClass * klass)147 gimp_levels_tool_class_init (GimpLevelsToolClass *klass)
148 {
149 GObjectClass *object_class = G_OBJECT_CLASS (klass);
150 GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
151 GimpFilterToolClass *filter_tool_class = GIMP_FILTER_TOOL_CLASS (klass);
152
153 object_class->finalize = gimp_levels_tool_finalize;
154
155 tool_class->initialize = gimp_levels_tool_initialize;
156
157 filter_tool_class->get_operation = gimp_levels_tool_get_operation;
158 filter_tool_class->dialog = gimp_levels_tool_dialog;
159 filter_tool_class->reset = gimp_levels_tool_reset;
160 filter_tool_class->config_notify = gimp_levels_tool_config_notify;
161 filter_tool_class->settings_import = gimp_levels_tool_settings_import;
162 filter_tool_class->settings_export = gimp_levels_tool_settings_export;
163 filter_tool_class->color_picked = gimp_levels_tool_color_picked;
164 }
165
166 static void
gimp_levels_tool_init(GimpLevelsTool * tool)167 gimp_levels_tool_init (GimpLevelsTool *tool)
168 {
169 }
170
171 static void
gimp_levels_tool_finalize(GObject * object)172 gimp_levels_tool_finalize (GObject *object)
173 {
174 GimpLevelsTool *tool = GIMP_LEVELS_TOOL (object);
175
176 g_clear_object (&tool->histogram);
177 g_clear_object (&tool->histogram_async);
178
179 G_OBJECT_CLASS (parent_class)->finalize (object);
180 }
181
182 static gboolean
gimp_levels_tool_initialize(GimpTool * tool,GimpDisplay * display,GError ** error)183 gimp_levels_tool_initialize (GimpTool *tool,
184 GimpDisplay *display,
185 GError **error)
186 {
187 GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
188 GimpLevelsTool *l_tool = GIMP_LEVELS_TOOL (tool);
189 GimpImage *image = gimp_display_get_image (display);
190 GimpDrawable *drawable = gimp_image_get_active_drawable (image);
191 GimpLevelsConfig *config;
192 gdouble scale_factor;
193 gdouble step_increment;
194 gdouble page_increment;
195 gint digits;
196
197 if (! GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error))
198 {
199 return FALSE;
200 }
201
202 config = GIMP_LEVELS_CONFIG (filter_tool->config);
203
204 g_clear_object (&l_tool->histogram);
205 g_clear_object (&l_tool->histogram_async);
206 l_tool->histogram = gimp_histogram_new (config->linear);
207
208 l_tool->histogram_async = gimp_drawable_calculate_histogram_async (
209 drawable, l_tool->histogram, FALSE);
210 gimp_histogram_view_set_histogram (GIMP_HISTOGRAM_VIEW (l_tool->histogram_view),
211 l_tool->histogram);
212
213 if (gimp_drawable_get_component_type (drawable) == GIMP_COMPONENT_TYPE_U8)
214 {
215 scale_factor = 255.0;
216 step_increment = 1.0;
217 page_increment = 8.0;
218 digits = 0;
219 }
220 else
221 {
222 scale_factor = 100;
223 step_increment = 0.01;
224 page_increment = 1.0;
225 digits = 2;
226 }
227
228 gimp_prop_widget_set_factor (l_tool->low_input_spinbutton,
229 scale_factor, step_increment, page_increment,
230 digits);
231 gimp_prop_widget_set_factor (l_tool->high_input_spinbutton,
232 scale_factor, step_increment, page_increment,
233 digits);
234 gimp_prop_widget_set_factor (l_tool->low_output_spinbutton,
235 scale_factor, step_increment, page_increment,
236 digits);
237 gimp_prop_widget_set_factor (l_tool->high_output_spinbutton,
238 scale_factor, step_increment, page_increment,
239 digits);
240
241 gtk_adjustment_configure (l_tool->gamma_linear,
242 scale_factor / 2.0,
243 0, scale_factor, 0.1, 1.0, 0);
244
245 return TRUE;
246 }
247
248 static gchar *
gimp_levels_tool_get_operation(GimpFilterTool * filter_tool,gchar ** description)249 gimp_levels_tool_get_operation (GimpFilterTool *filter_tool,
250 gchar **description)
251 {
252 *description = g_strdup (_("Adjust Color Levels"));
253
254 return g_strdup ("gimp:levels");
255 }
256
257
258 /*******************/
259 /* Levels dialog */
260 /*******************/
261
262 static GtkWidget *
gimp_levels_tool_color_picker_new(GimpLevelsTool * tool,guint value)263 gimp_levels_tool_color_picker_new (GimpLevelsTool *tool,
264 guint value)
265 {
266 const gchar *icon_name;
267 const gchar *help;
268 gboolean all_channels = (value & PICK_ALL_CHANNELS) != 0;
269
270 switch (value & 0xF)
271 {
272 case PICK_LOW_INPUT:
273 icon_name = GIMP_ICON_COLOR_PICKER_BLACK;
274
275 if (all_channels)
276 help = _("Pick black point for all channels");
277 else
278 help = _("Pick black point for the selected channel");
279 break;
280
281 case PICK_GAMMA:
282 icon_name = GIMP_ICON_COLOR_PICKER_GRAY;
283
284 if (all_channels)
285 help = _("Pick gray point for all channels");
286 else
287 help = _("Pick gray point for the selected channel");
288 break;
289
290 case PICK_HIGH_INPUT:
291 icon_name = GIMP_ICON_COLOR_PICKER_WHITE;
292
293 if (all_channels)
294 help = _("Pick white point for all channels");
295 else
296 help = _("Pick white point for the selected channel");
297 break;
298
299 default:
300 return NULL;
301 }
302
303 return gimp_filter_tool_add_color_picker (GIMP_FILTER_TOOL (tool),
304 GUINT_TO_POINTER (value),
305 icon_name,
306 help,
307 /* pick_abyss = */ FALSE,
308 NULL, NULL);
309 }
310
311 static void
gimp_levels_tool_dialog(GimpFilterTool * filter_tool)312 gimp_levels_tool_dialog (GimpFilterTool *filter_tool)
313 {
314 GimpLevelsTool *tool = GIMP_LEVELS_TOOL (filter_tool);
315 GimpToolOptions *tool_options = GIMP_TOOL_GET_OPTIONS (filter_tool);
316 GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
317 GtkListStore *store;
318 GtkWidget *main_vbox;
319 GtkWidget *frame_vbox;
320 GtkWidget *vbox;
321 GtkWidget *vbox2;
322 GtkWidget *vbox3;
323 GtkWidget *hbox;
324 GtkWidget *hbox2;
325 GtkWidget *label;
326 GtkWidget *main_frame;
327 GtkWidget *frame;
328 GtkWidget *button;
329 GtkWidget *spinbutton;
330 GtkAdjustment *adjustment;
331 GtkWidget *bar;
332 GtkWidget *handle_bar;
333 gint border;
334
335 g_signal_connect (filter_tool->settings_box, "file-dialog-setup",
336 G_CALLBACK (gimp_levels_tool_export_setup),
337 filter_tool);
338
339 main_vbox = gimp_filter_tool_dialog_get_vbox (filter_tool);
340
341 /* The combo box for selecting channels */
342 main_frame = gimp_frame_new (NULL);
343 gtk_box_pack_start (GTK_BOX (main_vbox), main_frame, TRUE, TRUE, 0);
344 gtk_widget_show (main_frame);
345
346 hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
347 gtk_frame_set_label_widget (GTK_FRAME (main_frame), hbox);
348 gtk_widget_show (hbox);
349
350 label = gtk_label_new_with_mnemonic (_("Cha_nnel:"));
351 gimp_label_set_attributes (GTK_LABEL (label),
352 PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
353 -1);
354 gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
355 gtk_widget_show (label);
356
357 store = gimp_enum_store_new_with_range (GIMP_TYPE_HISTOGRAM_CHANNEL,
358 GIMP_HISTOGRAM_VALUE,
359 GIMP_HISTOGRAM_ALPHA);
360 tool->channel_menu =
361 gimp_enum_combo_box_new_with_model (GIMP_ENUM_STORE (store));
362 g_object_unref (store);
363
364 g_object_add_weak_pointer (G_OBJECT (tool->channel_menu),
365 (gpointer) &tool->channel_menu);
366
367 gimp_enum_combo_box_set_icon_prefix (GIMP_ENUM_COMBO_BOX (tool->channel_menu),
368 "gimp-channel");
369 gimp_int_combo_box_set_sensitivity (GIMP_INT_COMBO_BOX (tool->channel_menu),
370 levels_menu_sensitivity, filter_tool, NULL);
371 gtk_box_pack_start (GTK_BOX (hbox), tool->channel_menu, FALSE, FALSE, 0);
372 gtk_widget_show (tool->channel_menu);
373
374 g_signal_connect (tool->channel_menu, "changed",
375 G_CALLBACK (levels_channel_callback),
376 tool);
377
378 gtk_label_set_mnemonic_widget (GTK_LABEL (label), tool->channel_menu);
379
380 button = gtk_button_new_with_mnemonic (_("R_eset Channel"));
381 gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
382 gtk_widget_show (button);
383
384 g_signal_connect (button, "clicked",
385 G_CALLBACK (levels_channel_reset_callback),
386 tool);
387
388 /* The histogram scale radio buttons */
389 hbox2 = gimp_prop_enum_icon_box_new (G_OBJECT (tool_options),
390 "histogram-scale", "gimp-histogram",
391 0, 0);
392 gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
393 gtk_widget_show (hbox2);
394
395 /* The linear/perceptual radio buttons */
396 hbox2 = gimp_prop_boolean_icon_box_new (G_OBJECT (config),
397 "linear",
398 GIMP_ICON_COLOR_SPACE_LINEAR,
399 GIMP_ICON_COLOR_SPACE_PERCEPTUAL,
400 _("Adjust levels in linear light"),
401 _("Adjust levels perceptually"));
402 gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
403 gtk_widget_show (hbox2);
404
405 frame_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
406 gtk_container_add (GTK_CONTAINER (main_frame), frame_vbox);
407 gtk_widget_show (frame_vbox);
408
409 /* Input levels frame */
410 frame = gimp_frame_new (_("Input Levels"));
411 gtk_box_pack_start (GTK_BOX (frame_vbox), frame, TRUE, TRUE, 0);
412 gtk_widget_show (frame);
413
414 vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
415 gtk_container_add (GTK_CONTAINER (frame), vbox);
416 gtk_widget_show (vbox);
417
418 frame = gtk_frame_new (NULL);
419 gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
420 gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
421 gtk_widget_show (frame);
422
423 vbox2 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
424 gtk_container_add (GTK_CONTAINER (frame), vbox2);
425 gtk_widget_show (vbox2);
426
427 tool->histogram_view = gimp_histogram_view_new (FALSE);
428
429 g_object_add_weak_pointer (G_OBJECT (tool->histogram_view),
430 (gpointer) &tool->histogram_view);
431
432 gtk_box_pack_start (GTK_BOX (vbox2), tool->histogram_view, TRUE, TRUE, 0);
433 gtk_widget_show (GTK_WIDGET (tool->histogram_view));
434
435 g_object_bind_property (G_OBJECT (tool_options), "histogram-scale",
436 G_OBJECT (tool->histogram_view), "histogram-scale",
437 G_BINDING_SYNC_CREATE |
438 G_BINDING_BIDIRECTIONAL);
439
440 g_object_get (tool->histogram_view, "border-width", &border, NULL);
441
442 vbox3 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
443 gtk_container_set_border_width (GTK_CONTAINER (vbox3), border);
444 gtk_box_pack_start (GTK_BOX (vbox2), vbox3, FALSE, FALSE, 0);
445 gtk_widget_show (vbox3);
446
447 tool->input_bar = g_object_new (GIMP_TYPE_COLOR_BAR, NULL);
448 gtk_widget_set_size_request (tool->input_bar, -1, GRADIENT_HEIGHT / 2);
449 gtk_box_pack_start (GTK_BOX (vbox3), tool->input_bar, FALSE, FALSE, 0);
450 gtk_widget_show (tool->input_bar);
451
452 bar = g_object_new (GIMP_TYPE_COLOR_BAR, NULL);
453 gtk_widget_set_size_request (bar, -1, GRADIENT_HEIGHT / 2);
454 gtk_box_pack_start (GTK_BOX (vbox3), bar, FALSE, FALSE, 0);
455 gtk_widget_show (bar);
456
457 handle_bar = g_object_new (GIMP_TYPE_HANDLE_BAR, NULL);
458 gtk_widget_set_size_request (handle_bar, -1, CONTROL_HEIGHT);
459 gtk_box_pack_start (GTK_BOX (vbox3), handle_bar, FALSE, FALSE, 0);
460 gtk_widget_show (handle_bar);
461
462 gimp_handle_bar_connect_events (GIMP_HANDLE_BAR (handle_bar),
463 tool->input_bar);
464 gimp_handle_bar_connect_events (GIMP_HANDLE_BAR (handle_bar),
465 bar);
466
467 /* Horizontal box for input levels spinbuttons */
468 hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
469 gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
470 gtk_widget_show (hbox);
471
472 /* low input spin */
473 hbox2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
474 gtk_box_pack_start (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
475 gtk_widget_show (hbox2);
476
477 button = gimp_levels_tool_color_picker_new (tool, PICK_LOW_INPUT);
478 gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
479 gtk_widget_show (button);
480
481 tool->low_input_spinbutton = spinbutton =
482 gimp_prop_spin_button_new (filter_tool->config, "low-input",
483 0.01, 0.1, 1);
484 gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
485 gtk_widget_show (spinbutton);
486
487 tool->low_input = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
488 gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 0,
489 tool->low_input);
490
491 /* clamp input toggle */
492 hbox2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
493 gtk_box_pack_start (GTK_BOX (hbox), hbox2, TRUE, FALSE, 0);
494 gtk_widget_show (hbox2);
495
496 button = gimp_prop_check_button_new (filter_tool->config, "clamp-input",
497 _("Clamp _input"));
498 gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
499 gtk_widget_show (button);
500
501 /* input gamma spin */
502 spinbutton = gimp_prop_spin_button_new (filter_tool->config, "gamma",
503 0.01, 0.1, 2);
504 gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
505 gimp_help_set_help_data (spinbutton, _("Gamma"), NULL);
506 gtk_widget_show (spinbutton);
507
508 tool->gamma = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
509
510 tool->gamma_linear = GTK_ADJUSTMENT (gtk_adjustment_new (127, 0, 255,
511 0.1, 1.0, 0.0));
512 g_signal_connect (tool->gamma_linear, "value-changed",
513 G_CALLBACK (levels_linear_gamma_changed),
514 tool);
515
516 gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 1,
517 tool->gamma_linear);
518 g_object_unref (tool->gamma_linear);
519
520 /* high input spin */
521 hbox2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
522 gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
523 gtk_widget_show (hbox2);
524
525 button = gimp_levels_tool_color_picker_new (tool, PICK_HIGH_INPUT);
526 gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
527 gtk_widget_show (button);
528
529 spinbutton = gimp_prop_spin_button_new (filter_tool->config, "high-input",
530 0.01, 0.1, 1);
531 gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
532 gtk_widget_show (spinbutton);
533 tool->high_input_spinbutton = spinbutton;
534
535 tool->high_input = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
536 gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 2,
537 tool->high_input);
538
539 /* Output levels frame */
540 frame = gimp_frame_new (_("Output Levels"));
541 gtk_box_pack_start (GTK_BOX (frame_vbox), frame, FALSE, FALSE, 0);
542 gtk_widget_show (frame);
543
544 vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
545 gtk_container_add (GTK_CONTAINER (frame), vbox);
546 gtk_widget_show (vbox);
547
548 frame = gtk_frame_new (NULL);
549 gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
550 gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
551 gtk_widget_show (frame);
552
553 vbox2 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
554 gtk_container_set_border_width (GTK_CONTAINER (vbox2), border);
555 gtk_container_add (GTK_CONTAINER (frame), vbox2);
556 gtk_widget_show (vbox2);
557
558 tool->output_bar = g_object_new (GIMP_TYPE_COLOR_BAR, NULL);
559 gtk_widget_set_size_request (tool->output_bar, -1, GRADIENT_HEIGHT);
560 gtk_box_pack_start (GTK_BOX (vbox2), tool->output_bar, FALSE, FALSE, 0);
561 gtk_widget_show (tool->output_bar);
562
563 handle_bar = g_object_new (GIMP_TYPE_HANDLE_BAR, NULL);
564 gtk_widget_set_size_request (handle_bar, -1, CONTROL_HEIGHT);
565 gtk_box_pack_start (GTK_BOX (vbox2), handle_bar, FALSE, FALSE, 0);
566 gtk_widget_show (handle_bar);
567
568 gimp_handle_bar_connect_events (GIMP_HANDLE_BAR (handle_bar),
569 tool->output_bar);
570
571 /* Horizontal box for levels spin widgets */
572 hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
573 gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
574 gtk_widget_show (hbox);
575
576 /* low output spin */
577 tool->low_output_spinbutton = spinbutton =
578 gimp_prop_spin_button_new (filter_tool->config, "low-output",
579 0.01, 0.1, 1);
580 gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
581 gtk_widget_show (spinbutton);
582
583 adjustment = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
584 gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 0, adjustment);
585
586 /* clamp output toggle */
587 button = gimp_prop_check_button_new (filter_tool->config, "clamp-output",
588 _("Clamp outpu_t"));
589 gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, FALSE, 0);
590 gtk_widget_show (button);
591
592 /* high output spin */
593 tool->high_output_spinbutton = spinbutton =
594 gimp_prop_spin_button_new (filter_tool->config, "high-output",
595 0.01, 0.1, 1);
596 gtk_box_pack_end (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
597 gtk_widget_show (spinbutton);
598
599 adjustment = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
600 gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 2, adjustment);
601
602 /* all channels frame */
603 main_frame = gimp_frame_new (_("All Channels"));
604 gtk_box_pack_start (GTK_BOX (main_vbox), main_frame, FALSE, FALSE, 0);
605 gtk_widget_show (main_frame);
606
607 frame_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
608 gtk_container_add (GTK_CONTAINER (main_frame), frame_vbox);
609 gtk_widget_show (frame_vbox);
610
611 hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
612 gtk_box_pack_start (GTK_BOX (frame_vbox), hbox, FALSE, FALSE, 0);
613 gtk_widget_show (hbox);
614
615 button = gtk_button_new_with_mnemonic (_("_Auto Input Levels"));
616 gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
617 gimp_help_set_help_data (button,
618 _("Adjust levels for all channels automatically"),
619 NULL);
620 gtk_widget_show (button);
621
622 g_signal_connect (button, "clicked",
623 G_CALLBACK (levels_stretch_callback),
624 tool);
625
626 button = gimp_levels_tool_color_picker_new (tool,
627 PICK_HIGH_INPUT |
628 PICK_ALL_CHANNELS);
629 gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
630 gtk_widget_show (button);
631
632 button = gimp_levels_tool_color_picker_new (tool,
633 PICK_GAMMA |
634 PICK_ALL_CHANNELS);
635 gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
636 gtk_widget_show (button);
637
638 button = gimp_levels_tool_color_picker_new (tool,
639 PICK_LOW_INPUT |
640 PICK_ALL_CHANNELS);
641 gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
642 gtk_widget_show (button);
643
644 button = gimp_icon_button_new (GIMP_ICON_TOOL_CURVES,
645 _("Edit these Settings as Curves"));
646 gtk_box_pack_start (GTK_BOX (main_vbox), button, FALSE, FALSE, 0);
647 gtk_widget_show (button);
648
649 g_signal_connect (button, "clicked",
650 G_CALLBACK (levels_to_curves_callback),
651 tool);
652
653 gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (tool->channel_menu),
654 config->channel);
655 }
656
657 static void
gimp_levels_tool_reset(GimpFilterTool * filter_tool)658 gimp_levels_tool_reset (GimpFilterTool *filter_tool)
659 {
660 GimpHistogramChannel channel;
661
662 g_object_get (filter_tool->config,
663 "channel", &channel,
664 NULL);
665
666 GIMP_FILTER_TOOL_CLASS (parent_class)->reset (filter_tool);
667
668 g_object_set (filter_tool->config,
669 "channel", channel,
670 NULL);
671 }
672
673 static void
gimp_levels_tool_config_notify(GimpFilterTool * filter_tool,GimpConfig * config,const GParamSpec * pspec)674 gimp_levels_tool_config_notify (GimpFilterTool *filter_tool,
675 GimpConfig *config,
676 const GParamSpec *pspec)
677 {
678 GimpLevelsTool *levels_tool = GIMP_LEVELS_TOOL (filter_tool);
679 GimpLevelsConfig *levels_config = GIMP_LEVELS_CONFIG (config);
680
681 GIMP_FILTER_TOOL_CLASS (parent_class)->config_notify (filter_tool,
682 config, pspec);
683
684 if (! levels_tool->channel_menu ||
685 ! levels_tool->histogram_view)
686 return;
687
688 if (! strcmp (pspec->name, "linear"))
689 {
690 g_clear_object (&levels_tool->histogram);
691 g_clear_object (&levels_tool->histogram_async);
692 levels_tool->histogram = gimp_histogram_new (levels_config->linear);
693
694 levels_tool->histogram_async = gimp_drawable_calculate_histogram_async (
695 GIMP_TOOL (filter_tool)->drawable, levels_tool->histogram, FALSE);
696 gimp_histogram_view_set_histogram (GIMP_HISTOGRAM_VIEW (levels_tool->histogram_view),
697 levels_tool->histogram);
698 }
699 else if (! strcmp (pspec->name, "channel"))
700 {
701 gimp_histogram_view_set_channel (GIMP_HISTOGRAM_VIEW (levels_tool->histogram_view),
702 levels_config->channel);
703 gimp_color_bar_set_channel (GIMP_COLOR_BAR (levels_tool->output_bar),
704 levels_config->channel);
705 gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (levels_tool->channel_menu),
706 levels_config->channel);
707 }
708 else if (! strcmp (pspec->name, "gamma") ||
709 ! strcmp (pspec->name, "low-input") ||
710 ! strcmp (pspec->name, "high-input"))
711 {
712 gdouble low = gtk_adjustment_get_value (levels_tool->low_input);
713 gdouble high = gtk_adjustment_get_value (levels_tool->high_input);
714 gdouble delta, mid, tmp, value;
715
716 gtk_adjustment_set_lower (levels_tool->high_input, low);
717 gtk_adjustment_set_lower (levels_tool->gamma_linear, low);
718
719 gtk_adjustment_set_upper (levels_tool->low_input, high);
720 gtk_adjustment_set_upper (levels_tool->gamma_linear, high);
721
722 levels_update_input_bar (levels_tool);
723
724 delta = (high - low) / 2.0;
725 mid = low + delta;
726 tmp = log10 (1.0 / levels_config->gamma[levels_config->channel]);
727 value = mid + delta * tmp;
728
729 gtk_adjustment_set_value (levels_tool->gamma_linear, value);
730 }
731 }
732
733 static gboolean
gimp_levels_tool_settings_import(GimpFilterTool * filter_tool,GInputStream * input,GError ** error)734 gimp_levels_tool_settings_import (GimpFilterTool *filter_tool,
735 GInputStream *input,
736 GError **error)
737 {
738 GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
739 gchar header[64];
740 gsize bytes_read;
741
742 if (! g_input_stream_read_all (input, header, sizeof (header),
743 &bytes_read, NULL, error) ||
744 bytes_read != sizeof (header))
745 {
746 g_prefix_error (error, _("Could not read header: "));
747 return FALSE;
748 }
749
750 g_seekable_seek (G_SEEKABLE (input), 0, G_SEEK_SET, NULL, NULL);
751
752 if (g_str_has_prefix (header, "# GIMP Levels File\n"))
753 return gimp_levels_config_load_cruft (config, input, error);
754
755 return GIMP_FILTER_TOOL_CLASS (parent_class)->settings_import (filter_tool,
756 input,
757 error);
758 }
759
760 static gboolean
gimp_levels_tool_settings_export(GimpFilterTool * filter_tool,GOutputStream * output,GError ** error)761 gimp_levels_tool_settings_export (GimpFilterTool *filter_tool,
762 GOutputStream *output,
763 GError **error)
764 {
765 GimpLevelsTool *tool = GIMP_LEVELS_TOOL (filter_tool);
766 GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
767
768 if (tool->export_old_format)
769 return gimp_levels_config_save_cruft (config, output, error);
770
771 return GIMP_FILTER_TOOL_CLASS (parent_class)->settings_export (filter_tool,
772 output,
773 error);
774 }
775
776 static void
levels_input_adjust_by_color(GimpLevelsConfig * config,guint value,GimpHistogramChannel channel,const GimpRGB * color)777 levels_input_adjust_by_color (GimpLevelsConfig *config,
778 guint value,
779 GimpHistogramChannel channel,
780 const GimpRGB *color)
781 {
782 switch (value & 0xF)
783 {
784 case PICK_LOW_INPUT:
785 gimp_levels_config_adjust_by_colors (config, channel, color, NULL, NULL);
786 break;
787 case PICK_GAMMA:
788 gimp_levels_config_adjust_by_colors (config, channel, NULL, color, NULL);
789 break;
790 case PICK_HIGH_INPUT:
791 gimp_levels_config_adjust_by_colors (config, channel, NULL, NULL, color);
792 break;
793 default:
794 break;
795 }
796 }
797
798 static void
gimp_levels_tool_color_picked(GimpFilterTool * color_tool,gpointer identifier,gdouble x,gdouble y,const Babl * sample_format,const GimpRGB * color)799 gimp_levels_tool_color_picked (GimpFilterTool *color_tool,
800 gpointer identifier,
801 gdouble x,
802 gdouble y,
803 const Babl *sample_format,
804 const GimpRGB *color)
805 {
806 GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (color_tool);
807 GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
808 GimpRGB rgb = *color;
809 guint value = GPOINTER_TO_UINT (identifier);
810
811 if (config->linear)
812 babl_process (babl_fish (babl_format ("R'G'B'A double"),
813 babl_format ("RGBA double")),
814 &rgb, &rgb, 1);
815
816 if (value & PICK_ALL_CHANNELS &&
817 gimp_babl_format_get_base_type (sample_format) == GIMP_RGB)
818 {
819 GimpHistogramChannel channel;
820
821 /* first reset the value channel */
822 switch (value & 0xF)
823 {
824 case PICK_LOW_INPUT:
825 config->low_input[GIMP_HISTOGRAM_VALUE] = 0.0;
826 break;
827 case PICK_GAMMA:
828 config->gamma[GIMP_HISTOGRAM_VALUE] = 1.0;
829 break;
830 case PICK_HIGH_INPUT:
831 config->high_input[GIMP_HISTOGRAM_VALUE] = 1.0;
832 break;
833 default:
834 break;
835 }
836
837 /* then adjust all color channels */
838 for (channel = GIMP_HISTOGRAM_RED;
839 channel <= GIMP_HISTOGRAM_BLUE;
840 channel++)
841 {
842 levels_input_adjust_by_color (config, value, channel, &rgb);
843 }
844 }
845 else
846 {
847 levels_input_adjust_by_color (config, value, config->channel, &rgb);
848 }
849 }
850
851 static void
gimp_levels_tool_export_setup(GimpSettingsBox * settings_box,GtkFileChooserDialog * dialog,gboolean export,GimpLevelsTool * tool)852 gimp_levels_tool_export_setup (GimpSettingsBox *settings_box,
853 GtkFileChooserDialog *dialog,
854 gboolean export,
855 GimpLevelsTool *tool)
856 {
857 GtkWidget *button;
858
859 if (! export)
860 return;
861
862 button = gtk_check_button_new_with_mnemonic (_("Use _old levels file format"));
863 gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button),
864 tool->export_old_format);
865 gtk_file_chooser_set_extra_widget (GTK_FILE_CHOOSER (dialog), button);
866 gtk_widget_show (button);
867
868 g_signal_connect (button, "toggled",
869 G_CALLBACK (gimp_toggle_button_update),
870 &tool->export_old_format);
871 }
872
873 static void
levels_update_input_bar(GimpLevelsTool * tool)874 levels_update_input_bar (GimpLevelsTool *tool)
875 {
876 GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
877 GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
878
879 switch (config->channel)
880 {
881 gdouble value;
882
883 case GIMP_HISTOGRAM_VALUE:
884 case GIMP_HISTOGRAM_ALPHA:
885 case GIMP_HISTOGRAM_RGB:
886 case GIMP_HISTOGRAM_LUMINANCE:
887 {
888 guchar v[256];
889 gint i;
890
891 for (i = 0; i < 256; i++)
892 {
893 value = gimp_operation_levels_map_input (config,
894 config->channel,
895 i / 255.0);
896 v[i] = CLAMP (value, 0.0, 1.0) * 255.999;
897 }
898
899 gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->input_bar),
900 v, v, v);
901 }
902 break;
903
904 case GIMP_HISTOGRAM_RED:
905 case GIMP_HISTOGRAM_GREEN:
906 case GIMP_HISTOGRAM_BLUE:
907 {
908 guchar r[256];
909 guchar g[256];
910 guchar b[256];
911 gint i;
912
913 for (i = 0; i < 256; i++)
914 {
915 value = gimp_operation_levels_map_input (config,
916 GIMP_HISTOGRAM_RED,
917 i / 255.0);
918 r[i] = CLAMP (value, 0.0, 1.0) * 255.999;
919
920 value = gimp_operation_levels_map_input (config,
921 GIMP_HISTOGRAM_GREEN,
922 i / 255.0);
923 g[i] = CLAMP (value, 0.0, 1.0) * 255.999;
924
925 value = gimp_operation_levels_map_input (config,
926 GIMP_HISTOGRAM_BLUE,
927 i / 255.0);
928 b[i] = CLAMP (value, 0.0, 1.0) * 255.999;
929 }
930
931 gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->input_bar),
932 r, g, b);
933 }
934 break;
935 }
936 }
937
938 static void
levels_channel_callback(GtkWidget * widget,GimpFilterTool * filter_tool)939 levels_channel_callback (GtkWidget *widget,
940 GimpFilterTool *filter_tool)
941 {
942 GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
943 gint value;
944
945 if (gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &value) &&
946 config->channel != value)
947 {
948 g_object_set (config,
949 "channel", value,
950 NULL);
951 }
952 }
953
954 static void
levels_channel_reset_callback(GtkWidget * widget,GimpFilterTool * filter_tool)955 levels_channel_reset_callback (GtkWidget *widget,
956 GimpFilterTool *filter_tool)
957 {
958 gimp_levels_config_reset_channel (GIMP_LEVELS_CONFIG (filter_tool->config));
959 }
960
961 static gboolean
levels_menu_sensitivity(gint value,gpointer data)962 levels_menu_sensitivity (gint value,
963 gpointer data)
964 {
965 GimpDrawable *drawable = GIMP_TOOL (data)->drawable;
966 GimpHistogramChannel channel = value;
967
968 if (!drawable)
969 return FALSE;
970
971 switch (channel)
972 {
973 case GIMP_HISTOGRAM_VALUE:
974 return TRUE;
975
976 case GIMP_HISTOGRAM_RED:
977 case GIMP_HISTOGRAM_GREEN:
978 case GIMP_HISTOGRAM_BLUE:
979 return gimp_drawable_is_rgb (drawable);
980
981 case GIMP_HISTOGRAM_ALPHA:
982 return gimp_drawable_has_alpha (drawable);
983
984 case GIMP_HISTOGRAM_RGB:
985 return FALSE;
986
987 case GIMP_HISTOGRAM_LUMINANCE:
988 return FALSE;
989 }
990
991 return FALSE;
992 }
993
994 static void
levels_stretch_callback(GtkWidget * widget,GimpLevelsTool * levels_tool)995 levels_stretch_callback (GtkWidget *widget,
996 GimpLevelsTool *levels_tool)
997 {
998 GimpTool *tool = GIMP_TOOL (levels_tool);
999 GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (levels_tool);
1000 GimpWaitable *waitable;
1001
1002 waitable = gimp_trivially_cancelable_waitable_new (
1003 GIMP_WAITABLE (levels_tool->histogram_async));
1004
1005 gimp_wait (tool->tool_info->gimp, waitable, _("Calculating histogram..."));
1006
1007 g_object_unref (waitable);
1008
1009 if (gimp_async_is_synced (levels_tool->histogram_async) &&
1010 gimp_async_is_finished (levels_tool->histogram_async))
1011 {
1012 gimp_levels_config_stretch (GIMP_LEVELS_CONFIG (filter_tool->config),
1013 levels_tool->histogram,
1014 gimp_drawable_is_rgb (tool->drawable));
1015 }
1016 }
1017
1018 static void
levels_linear_gamma_changed(GtkAdjustment * adjustment,GimpLevelsTool * tool)1019 levels_linear_gamma_changed (GtkAdjustment *adjustment,
1020 GimpLevelsTool *tool)
1021 {
1022 gdouble low_input = gtk_adjustment_get_value (tool->low_input);
1023 gdouble high_input = gtk_adjustment_get_value (tool->high_input);
1024 gdouble delta, mid, tmp, value;
1025
1026 delta = (high_input - low_input) / 2.0;
1027
1028 if (delta >= 0.5)
1029 {
1030 mid = low_input + delta;
1031 tmp = (gtk_adjustment_get_value (adjustment) - mid) / delta;
1032 value = 1.0 / pow (10, tmp);
1033
1034 /* round the gamma value to the nearest 1/100th */
1035 value = floor (value * 100 + 0.5) / 100.0;
1036
1037 gtk_adjustment_set_value (tool->gamma, value);
1038 }
1039 }
1040
1041 static void
levels_to_curves_callback(GtkWidget * widget,GimpFilterTool * filter_tool)1042 levels_to_curves_callback (GtkWidget *widget,
1043 GimpFilterTool *filter_tool)
1044 {
1045 GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
1046 GimpCurvesConfig *curves;
1047
1048 curves = gimp_levels_config_to_curves_config (config);
1049
1050 gimp_filter_tool_edit_as (filter_tool,
1051 "gimp-curves-tool",
1052 GIMP_CONFIG (curves));
1053
1054 g_object_unref (curves);
1055 }
1056