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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:23:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 16:23:22 +0000
commite42129241681dde7adae7d20697e7b421682fbb4 (patch)
treeaf1fe815a5e639e68e59fabd8395ec69458b3e5e /app/tools/gimplevelstool.c
parentInitial commit. (diff)
downloadgimp-e42129241681dde7adae7d20697e7b421682fbb4.tar.xz
gimp-e42129241681dde7adae7d20697e7b421682fbb4.zip
Adding upstream version 2.10.22.upstream/2.10.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'app/tools/gimplevelstool.c')
-rw-r--r--app/tools/gimplevelstool.c1055
1 files changed, 1055 insertions, 0 deletions
diff --git a/app/tools/gimplevelstool.c b/app/tools/gimplevelstool.c
new file mode 100644
index 0000000..4e97f71
--- /dev/null
+++ b/app/tools/gimplevelstool.c
@@ -0,0 +1,1055 @@
+/* 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 <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpmath/gimpmath.h"
+#include "libgimpconfig/gimpconfig.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "tools-types.h"
+
+#include "gegl/gimp-babl.h"
+
+#include "operations/gimplevelsconfig.h"
+#include "operations/gimpoperationlevels.h"
+
+#include "core/gimp-gui.h"
+#include "core/gimpasync.h"
+#include "core/gimpcancelable.h"
+#include "core/gimpdrawable.h"
+#include "core/gimpdrawable-histogram.h"
+#include "core/gimperror.h"
+#include "core/gimphistogram.h"
+#include "core/gimpimage.h"
+#include "core/gimptoolinfo.h"
+#include "core/gimptriviallycancelablewaitable.h"
+#include "core/gimpwaitable.h"
+
+#include "widgets/gimpcolorbar.h"
+#include "widgets/gimphandlebar.h"
+#include "widgets/gimphelp-ids.h"
+#include "widgets/gimphistogramview.h"
+#include "widgets/gimppropwidgets.h"
+#include "widgets/gimpwidgets-constructors.h"
+
+#include "display/gimpdisplay.h"
+
+#include "gimphistogramoptions.h"
+#include "gimplevelstool.h"
+
+#include "gimp-intl.h"
+
+
+#define PICK_LOW_INPUT (1 << 0)
+#define PICK_GAMMA (1 << 1)
+#define PICK_HIGH_INPUT (1 << 2)
+#define PICK_ALL_CHANNELS (1 << 8)
+
+#define HISTOGRAM_WIDTH 256
+#define GRADIENT_HEIGHT 12
+#define CONTROL_HEIGHT 10
+
+
+/* local function prototypes */
+
+static void gimp_levels_tool_finalize (GObject *object);
+
+static gboolean gimp_levels_tool_initialize (GimpTool *tool,
+ GimpDisplay *display,
+ GError **error);
+
+static gchar * gimp_levels_tool_get_operation (GimpFilterTool *filter_tool,
+ gchar **description);
+static void gimp_levels_tool_dialog (GimpFilterTool *filter_tool);
+static void gimp_levels_tool_reset (GimpFilterTool *filter_tool);
+static void gimp_levels_tool_config_notify (GimpFilterTool *filter_tool,
+ GimpConfig *config,
+ const GParamSpec *pspec);
+static gboolean gimp_levels_tool_settings_import(GimpFilterTool *filter_tool,
+ GInputStream *input,
+ GError **error);
+static gboolean gimp_levels_tool_settings_export(GimpFilterTool *filter_tool,
+ GOutputStream *output,
+ GError **error);
+static void gimp_levels_tool_color_picked (GimpFilterTool *filter_tool,
+ gpointer identifier,
+ gdouble x,
+ gdouble y,
+ const Babl *sample_format,
+ const GimpRGB *color);
+
+static void gimp_levels_tool_export_setup (GimpSettingsBox *settings_box,
+ GtkFileChooserDialog *dialog,
+ gboolean export,
+ GimpLevelsTool *tool);
+
+static void levels_update_input_bar (GimpLevelsTool *tool);
+
+static void levels_channel_callback (GtkWidget *widget,
+ GimpFilterTool *filter_tool);
+static void levels_channel_reset_callback (GtkWidget *widget,
+ GimpFilterTool *filter_tool);
+
+static gboolean levels_menu_sensitivity (gint value,
+ gpointer data);
+
+static void levels_stretch_callback (GtkWidget *widget,
+ GimpLevelsTool *tool);
+static void levels_linear_gamma_changed (GtkAdjustment *adjustment,
+ GimpLevelsTool *tool);
+
+static void levels_to_curves_callback (GtkWidget *widget,
+ GimpFilterTool *filter_tool);
+
+
+G_DEFINE_TYPE (GimpLevelsTool, gimp_levels_tool, GIMP_TYPE_FILTER_TOOL)
+
+#define parent_class gimp_levels_tool_parent_class
+
+
+void
+gimp_levels_tool_register (GimpToolRegisterCallback callback,
+ gpointer data)
+{
+ (* callback) (GIMP_TYPE_LEVELS_TOOL,
+ GIMP_TYPE_HISTOGRAM_OPTIONS,
+ gimp_color_options_gui,
+ 0,
+ "gimp-levels-tool",
+ _("Levels"),
+ _("Adjust color levels"),
+ N_("_Levels..."), NULL,
+ NULL, GIMP_HELP_TOOL_LEVELS,
+ GIMP_ICON_TOOL_LEVELS,
+ data);
+}
+
+static void
+gimp_levels_tool_class_init (GimpLevelsToolClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
+ GimpFilterToolClass *filter_tool_class = GIMP_FILTER_TOOL_CLASS (klass);
+
+ object_class->finalize = gimp_levels_tool_finalize;
+
+ tool_class->initialize = gimp_levels_tool_initialize;
+
+ filter_tool_class->get_operation = gimp_levels_tool_get_operation;
+ filter_tool_class->dialog = gimp_levels_tool_dialog;
+ filter_tool_class->reset = gimp_levels_tool_reset;
+ filter_tool_class->config_notify = gimp_levels_tool_config_notify;
+ filter_tool_class->settings_import = gimp_levels_tool_settings_import;
+ filter_tool_class->settings_export = gimp_levels_tool_settings_export;
+ filter_tool_class->color_picked = gimp_levels_tool_color_picked;
+}
+
+static void
+gimp_levels_tool_init (GimpLevelsTool *tool)
+{
+}
+
+static void
+gimp_levels_tool_finalize (GObject *object)
+{
+ GimpLevelsTool *tool = GIMP_LEVELS_TOOL (object);
+
+ g_clear_object (&tool->histogram);
+ g_clear_object (&tool->histogram_async);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gboolean
+gimp_levels_tool_initialize (GimpTool *tool,
+ GimpDisplay *display,
+ GError **error)
+{
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
+ GimpLevelsTool *l_tool = GIMP_LEVELS_TOOL (tool);
+ GimpImage *image = gimp_display_get_image (display);
+ GimpDrawable *drawable = gimp_image_get_active_drawable (image);
+ GimpLevelsConfig *config;
+ gdouble scale_factor;
+ gdouble step_increment;
+ gdouble page_increment;
+ gint digits;
+
+ if (! GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error))
+ {
+ return FALSE;
+ }
+
+ config = GIMP_LEVELS_CONFIG (filter_tool->config);
+
+ g_clear_object (&l_tool->histogram);
+ g_clear_object (&l_tool->histogram_async);
+ l_tool->histogram = gimp_histogram_new (config->linear);
+
+ l_tool->histogram_async = gimp_drawable_calculate_histogram_async (
+ drawable, l_tool->histogram, FALSE);
+ gimp_histogram_view_set_histogram (GIMP_HISTOGRAM_VIEW (l_tool->histogram_view),
+ l_tool->histogram);
+
+ if (gimp_drawable_get_component_type (drawable) == GIMP_COMPONENT_TYPE_U8)
+ {
+ scale_factor = 255.0;
+ step_increment = 1.0;
+ page_increment = 8.0;
+ digits = 0;
+ }
+ else
+ {
+ scale_factor = 100;
+ step_increment = 0.01;
+ page_increment = 1.0;
+ digits = 2;
+ }
+
+ gimp_prop_widget_set_factor (l_tool->low_input_spinbutton,
+ scale_factor, step_increment, page_increment,
+ digits);
+ gimp_prop_widget_set_factor (l_tool->high_input_spinbutton,
+ scale_factor, step_increment, page_increment,
+ digits);
+ gimp_prop_widget_set_factor (l_tool->low_output_spinbutton,
+ scale_factor, step_increment, page_increment,
+ digits);
+ gimp_prop_widget_set_factor (l_tool->high_output_spinbutton,
+ scale_factor, step_increment, page_increment,
+ digits);
+
+ gtk_adjustment_configure (l_tool->gamma_linear,
+ scale_factor / 2.0,
+ 0, scale_factor, 0.1, 1.0, 0);
+
+ return TRUE;
+}
+
+static gchar *
+gimp_levels_tool_get_operation (GimpFilterTool *filter_tool,
+ gchar **description)
+{
+ *description = g_strdup (_("Adjust Color Levels"));
+
+ return g_strdup ("gimp:levels");
+}
+
+
+/*******************/
+/* Levels dialog */
+/*******************/
+
+static GtkWidget *
+gimp_levels_tool_color_picker_new (GimpLevelsTool *tool,
+ guint value)
+{
+ const gchar *icon_name;
+ const gchar *help;
+ gboolean all_channels = (value & PICK_ALL_CHANNELS) != 0;
+
+ switch (value & 0xF)
+ {
+ case PICK_LOW_INPUT:
+ icon_name = GIMP_ICON_COLOR_PICKER_BLACK;
+
+ if (all_channels)
+ help = _("Pick black point for all channels");
+ else
+ help = _("Pick black point for the selected channel");
+ break;
+
+ case PICK_GAMMA:
+ icon_name = GIMP_ICON_COLOR_PICKER_GRAY;
+
+ if (all_channels)
+ help = _("Pick gray point for all channels");
+ else
+ help = _("Pick gray point for the selected channel");
+ break;
+
+ case PICK_HIGH_INPUT:
+ icon_name = GIMP_ICON_COLOR_PICKER_WHITE;
+
+ if (all_channels)
+ help = _("Pick white point for all channels");
+ else
+ help = _("Pick white point for the selected channel");
+ break;
+
+ default:
+ return NULL;
+ }
+
+ return gimp_filter_tool_add_color_picker (GIMP_FILTER_TOOL (tool),
+ GUINT_TO_POINTER (value),
+ icon_name,
+ help,
+ /* pick_abyss = */ FALSE,
+ NULL, NULL);
+}
+
+static void
+gimp_levels_tool_dialog (GimpFilterTool *filter_tool)
+{
+ GimpLevelsTool *tool = GIMP_LEVELS_TOOL (filter_tool);
+ GimpToolOptions *tool_options = GIMP_TOOL_GET_OPTIONS (filter_tool);
+ GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
+ GtkListStore *store;
+ GtkWidget *main_vbox;
+ GtkWidget *frame_vbox;
+ GtkWidget *vbox;
+ GtkWidget *vbox2;
+ GtkWidget *vbox3;
+ GtkWidget *hbox;
+ GtkWidget *hbox2;
+ GtkWidget *label;
+ GtkWidget *main_frame;
+ GtkWidget *frame;
+ GtkWidget *button;
+ GtkWidget *spinbutton;
+ GtkAdjustment *adjustment;
+ GtkWidget *bar;
+ GtkWidget *handle_bar;
+ gint border;
+
+ g_signal_connect (filter_tool->settings_box, "file-dialog-setup",
+ G_CALLBACK (gimp_levels_tool_export_setup),
+ filter_tool);
+
+ main_vbox = gimp_filter_tool_dialog_get_vbox (filter_tool);
+
+ /* The combo box for selecting channels */
+ main_frame = gimp_frame_new (NULL);
+ gtk_box_pack_start (GTK_BOX (main_vbox), main_frame, TRUE, TRUE, 0);
+ gtk_widget_show (main_frame);
+
+ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+ gtk_frame_set_label_widget (GTK_FRAME (main_frame), hbox);
+ gtk_widget_show (hbox);
+
+ label = gtk_label_new_with_mnemonic (_("Cha_nnel:"));
+ gimp_label_set_attributes (GTK_LABEL (label),
+ PANGO_ATTR_WEIGHT, PANGO_WEIGHT_BOLD,
+ -1);
+ gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
+ gtk_widget_show (label);
+
+ store = gimp_enum_store_new_with_range (GIMP_TYPE_HISTOGRAM_CHANNEL,
+ GIMP_HISTOGRAM_VALUE,
+ GIMP_HISTOGRAM_ALPHA);
+ tool->channel_menu =
+ gimp_enum_combo_box_new_with_model (GIMP_ENUM_STORE (store));
+ g_object_unref (store);
+
+ g_object_add_weak_pointer (G_OBJECT (tool->channel_menu),
+ (gpointer) &tool->channel_menu);
+
+ gimp_enum_combo_box_set_icon_prefix (GIMP_ENUM_COMBO_BOX (tool->channel_menu),
+ "gimp-channel");
+ gimp_int_combo_box_set_sensitivity (GIMP_INT_COMBO_BOX (tool->channel_menu),
+ levels_menu_sensitivity, filter_tool, NULL);
+ gtk_box_pack_start (GTK_BOX (hbox), tool->channel_menu, FALSE, FALSE, 0);
+ gtk_widget_show (tool->channel_menu);
+
+ g_signal_connect (tool->channel_menu, "changed",
+ G_CALLBACK (levels_channel_callback),
+ tool);
+
+ gtk_label_set_mnemonic_widget (GTK_LABEL (label), tool->channel_menu);
+
+ button = gtk_button_new_with_mnemonic (_("R_eset Channel"));
+ gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
+ gtk_widget_show (button);
+
+ g_signal_connect (button, "clicked",
+ G_CALLBACK (levels_channel_reset_callback),
+ tool);
+
+ /* The histogram scale radio buttons */
+ hbox2 = gimp_prop_enum_icon_box_new (G_OBJECT (tool_options),
+ "histogram-scale", "gimp-histogram",
+ 0, 0);
+ gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
+ gtk_widget_show (hbox2);
+
+ /* The linear/perceptual radio buttons */
+ hbox2 = gimp_prop_boolean_icon_box_new (G_OBJECT (config),
+ "linear",
+ GIMP_ICON_COLOR_SPACE_LINEAR,
+ GIMP_ICON_COLOR_SPACE_PERCEPTUAL,
+ _("Adjust levels in linear light"),
+ _("Adjust levels perceptually"));
+ gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
+ gtk_widget_show (hbox2);
+
+ frame_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
+ gtk_container_add (GTK_CONTAINER (main_frame), frame_vbox);
+ gtk_widget_show (frame_vbox);
+
+ /* Input levels frame */
+ frame = gimp_frame_new (_("Input Levels"));
+ gtk_box_pack_start (GTK_BOX (frame_vbox), frame, TRUE, TRUE, 0);
+ gtk_widget_show (frame);
+
+ vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
+ gtk_container_add (GTK_CONTAINER (frame), vbox);
+ gtk_widget_show (vbox);
+
+ frame = gtk_frame_new (NULL);
+ gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
+ gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
+ gtk_widget_show (frame);
+
+ vbox2 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+ gtk_container_add (GTK_CONTAINER (frame), vbox2);
+ gtk_widget_show (vbox2);
+
+ tool->histogram_view = gimp_histogram_view_new (FALSE);
+
+ g_object_add_weak_pointer (G_OBJECT (tool->histogram_view),
+ (gpointer) &tool->histogram_view);
+
+ gtk_box_pack_start (GTK_BOX (vbox2), tool->histogram_view, TRUE, TRUE, 0);
+ gtk_widget_show (GTK_WIDGET (tool->histogram_view));
+
+ g_object_bind_property (G_OBJECT (tool_options), "histogram-scale",
+ G_OBJECT (tool->histogram_view), "histogram-scale",
+ G_BINDING_SYNC_CREATE |
+ G_BINDING_BIDIRECTIONAL);
+
+ g_object_get (tool->histogram_view, "border-width", &border, NULL);
+
+ vbox3 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+ gtk_container_set_border_width (GTK_CONTAINER (vbox3), border);
+ gtk_box_pack_start (GTK_BOX (vbox2), vbox3, FALSE, FALSE, 0);
+ gtk_widget_show (vbox3);
+
+ tool->input_bar = g_object_new (GIMP_TYPE_COLOR_BAR, NULL);
+ gtk_widget_set_size_request (tool->input_bar, -1, GRADIENT_HEIGHT / 2);
+ gtk_box_pack_start (GTK_BOX (vbox3), tool->input_bar, FALSE, FALSE, 0);
+ gtk_widget_show (tool->input_bar);
+
+ bar = g_object_new (GIMP_TYPE_COLOR_BAR, NULL);
+ gtk_widget_set_size_request (bar, -1, GRADIENT_HEIGHT / 2);
+ gtk_box_pack_start (GTK_BOX (vbox3), bar, FALSE, FALSE, 0);
+ gtk_widget_show (bar);
+
+ handle_bar = g_object_new (GIMP_TYPE_HANDLE_BAR, NULL);
+ gtk_widget_set_size_request (handle_bar, -1, CONTROL_HEIGHT);
+ gtk_box_pack_start (GTK_BOX (vbox3), handle_bar, FALSE, FALSE, 0);
+ gtk_widget_show (handle_bar);
+
+ gimp_handle_bar_connect_events (GIMP_HANDLE_BAR (handle_bar),
+ tool->input_bar);
+ gimp_handle_bar_connect_events (GIMP_HANDLE_BAR (handle_bar),
+ bar);
+
+ /* Horizontal box for input levels spinbuttons */
+ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+ gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
+ gtk_widget_show (hbox);
+
+ /* low input spin */
+ hbox2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
+ gtk_box_pack_start (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
+ gtk_widget_show (hbox2);
+
+ button = gimp_levels_tool_color_picker_new (tool, PICK_LOW_INPUT);
+ gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
+ gtk_widget_show (button);
+
+ tool->low_input_spinbutton = spinbutton =
+ gimp_prop_spin_button_new (filter_tool->config, "low-input",
+ 0.01, 0.1, 1);
+ gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
+ gtk_widget_show (spinbutton);
+
+ tool->low_input = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
+ gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 0,
+ tool->low_input);
+
+ /* clamp input toggle */
+ hbox2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
+ gtk_box_pack_start (GTK_BOX (hbox), hbox2, TRUE, FALSE, 0);
+ gtk_widget_show (hbox2);
+
+ button = gimp_prop_check_button_new (filter_tool->config, "clamp-input",
+ _("Clamp _input"));
+ gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
+ gtk_widget_show (button);
+
+ /* input gamma spin */
+ spinbutton = gimp_prop_spin_button_new (filter_tool->config, "gamma",
+ 0.01, 0.1, 2);
+ gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
+ gimp_help_set_help_data (spinbutton, _("Gamma"), NULL);
+ gtk_widget_show (spinbutton);
+
+ tool->gamma = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
+
+ tool->gamma_linear = GTK_ADJUSTMENT (gtk_adjustment_new (127, 0, 255,
+ 0.1, 1.0, 0.0));
+ g_signal_connect (tool->gamma_linear, "value-changed",
+ G_CALLBACK (levels_linear_gamma_changed),
+ tool);
+
+ gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 1,
+ tool->gamma_linear);
+ g_object_unref (tool->gamma_linear);
+
+ /* high input spin */
+ hbox2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
+ gtk_box_pack_end (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
+ gtk_widget_show (hbox2);
+
+ button = gimp_levels_tool_color_picker_new (tool, PICK_HIGH_INPUT);
+ gtk_box_pack_start (GTK_BOX (hbox2), button, FALSE, FALSE, 0);
+ gtk_widget_show (button);
+
+ spinbutton = gimp_prop_spin_button_new (filter_tool->config, "high-input",
+ 0.01, 0.1, 1);
+ gtk_box_pack_start (GTK_BOX (hbox2), spinbutton, FALSE, FALSE, 0);
+ gtk_widget_show (spinbutton);
+ tool->high_input_spinbutton = spinbutton;
+
+ tool->high_input = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
+ gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 2,
+ tool->high_input);
+
+ /* Output levels frame */
+ frame = gimp_frame_new (_("Output Levels"));
+ gtk_box_pack_start (GTK_BOX (frame_vbox), frame, FALSE, FALSE, 0);
+ gtk_widget_show (frame);
+
+ vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
+ gtk_container_add (GTK_CONTAINER (frame), vbox);
+ gtk_widget_show (vbox);
+
+ frame = gtk_frame_new (NULL);
+ gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
+ gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+ gtk_widget_show (frame);
+
+ vbox2 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+ gtk_container_set_border_width (GTK_CONTAINER (vbox2), border);
+ gtk_container_add (GTK_CONTAINER (frame), vbox2);
+ gtk_widget_show (vbox2);
+
+ tool->output_bar = g_object_new (GIMP_TYPE_COLOR_BAR, NULL);
+ gtk_widget_set_size_request (tool->output_bar, -1, GRADIENT_HEIGHT);
+ gtk_box_pack_start (GTK_BOX (vbox2), tool->output_bar, FALSE, FALSE, 0);
+ gtk_widget_show (tool->output_bar);
+
+ handle_bar = g_object_new (GIMP_TYPE_HANDLE_BAR, NULL);
+ gtk_widget_set_size_request (handle_bar, -1, CONTROL_HEIGHT);
+ gtk_box_pack_start (GTK_BOX (vbox2), handle_bar, FALSE, FALSE, 0);
+ gtk_widget_show (handle_bar);
+
+ gimp_handle_bar_connect_events (GIMP_HANDLE_BAR (handle_bar),
+ tool->output_bar);
+
+ /* Horizontal box for levels spin widgets */
+ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+ gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
+ gtk_widget_show (hbox);
+
+ /* low output spin */
+ tool->low_output_spinbutton = spinbutton =
+ gimp_prop_spin_button_new (filter_tool->config, "low-output",
+ 0.01, 0.1, 1);
+ gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
+ gtk_widget_show (spinbutton);
+
+ adjustment = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
+ gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 0, adjustment);
+
+ /* clamp output toggle */
+ button = gimp_prop_check_button_new (filter_tool->config, "clamp-output",
+ _("Clamp outpu_t"));
+ gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, FALSE, 0);
+ gtk_widget_show (button);
+
+ /* high output spin */
+ tool->high_output_spinbutton = spinbutton =
+ gimp_prop_spin_button_new (filter_tool->config, "high-output",
+ 0.01, 0.1, 1);
+ gtk_box_pack_end (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
+ gtk_widget_show (spinbutton);
+
+ adjustment = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (spinbutton));
+ gimp_handle_bar_set_adjustment (GIMP_HANDLE_BAR (handle_bar), 2, adjustment);
+
+ /* all channels frame */
+ main_frame = gimp_frame_new (_("All Channels"));
+ gtk_box_pack_start (GTK_BOX (main_vbox), main_frame, FALSE, FALSE, 0);
+ gtk_widget_show (main_frame);
+
+ frame_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
+ gtk_container_add (GTK_CONTAINER (main_frame), frame_vbox);
+ gtk_widget_show (frame_vbox);
+
+ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+ gtk_box_pack_start (GTK_BOX (frame_vbox), hbox, FALSE, FALSE, 0);
+ gtk_widget_show (hbox);
+
+ button = gtk_button_new_with_mnemonic (_("_Auto Input Levels"));
+ gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
+ gimp_help_set_help_data (button,
+ _("Adjust levels for all channels automatically"),
+ NULL);
+ gtk_widget_show (button);
+
+ g_signal_connect (button, "clicked",
+ G_CALLBACK (levels_stretch_callback),
+ tool);
+
+ button = gimp_levels_tool_color_picker_new (tool,
+ PICK_HIGH_INPUT |
+ PICK_ALL_CHANNELS);
+ gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
+ gtk_widget_show (button);
+
+ button = gimp_levels_tool_color_picker_new (tool,
+ PICK_GAMMA |
+ PICK_ALL_CHANNELS);
+ gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
+ gtk_widget_show (button);
+
+ button = gimp_levels_tool_color_picker_new (tool,
+ PICK_LOW_INPUT |
+ PICK_ALL_CHANNELS);
+ gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
+ gtk_widget_show (button);
+
+ button = gimp_icon_button_new (GIMP_ICON_TOOL_CURVES,
+ _("Edit these Settings as Curves"));
+ gtk_box_pack_start (GTK_BOX (main_vbox), button, FALSE, FALSE, 0);
+ gtk_widget_show (button);
+
+ g_signal_connect (button, "clicked",
+ G_CALLBACK (levels_to_curves_callback),
+ tool);
+
+ gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (tool->channel_menu),
+ config->channel);
+}
+
+static void
+gimp_levels_tool_reset (GimpFilterTool *filter_tool)
+{
+ GimpHistogramChannel channel;
+
+ g_object_get (filter_tool->config,
+ "channel", &channel,
+ NULL);
+
+ GIMP_FILTER_TOOL_CLASS (parent_class)->reset (filter_tool);
+
+ g_object_set (filter_tool->config,
+ "channel", channel,
+ NULL);
+}
+
+static void
+gimp_levels_tool_config_notify (GimpFilterTool *filter_tool,
+ GimpConfig *config,
+ const GParamSpec *pspec)
+{
+ GimpLevelsTool *levels_tool = GIMP_LEVELS_TOOL (filter_tool);
+ GimpLevelsConfig *levels_config = GIMP_LEVELS_CONFIG (config);
+
+ GIMP_FILTER_TOOL_CLASS (parent_class)->config_notify (filter_tool,
+ config, pspec);
+
+ if (! levels_tool->channel_menu ||
+ ! levels_tool->histogram_view)
+ return;
+
+ if (! strcmp (pspec->name, "linear"))
+ {
+ g_clear_object (&levels_tool->histogram);
+ g_clear_object (&levels_tool->histogram_async);
+ levels_tool->histogram = gimp_histogram_new (levels_config->linear);
+
+ levels_tool->histogram_async = gimp_drawable_calculate_histogram_async (
+ GIMP_TOOL (filter_tool)->drawable, levels_tool->histogram, FALSE);
+ gimp_histogram_view_set_histogram (GIMP_HISTOGRAM_VIEW (levels_tool->histogram_view),
+ levels_tool->histogram);
+ }
+ else if (! strcmp (pspec->name, "channel"))
+ {
+ gimp_histogram_view_set_channel (GIMP_HISTOGRAM_VIEW (levels_tool->histogram_view),
+ levels_config->channel);
+ gimp_color_bar_set_channel (GIMP_COLOR_BAR (levels_tool->output_bar),
+ levels_config->channel);
+ gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (levels_tool->channel_menu),
+ levels_config->channel);
+ }
+ else if (! strcmp (pspec->name, "gamma") ||
+ ! strcmp (pspec->name, "low-input") ||
+ ! strcmp (pspec->name, "high-input"))
+ {
+ gdouble low = gtk_adjustment_get_value (levels_tool->low_input);
+ gdouble high = gtk_adjustment_get_value (levels_tool->high_input);
+ gdouble delta, mid, tmp, value;
+
+ gtk_adjustment_set_lower (levels_tool->high_input, low);
+ gtk_adjustment_set_lower (levels_tool->gamma_linear, low);
+
+ gtk_adjustment_set_upper (levels_tool->low_input, high);
+ gtk_adjustment_set_upper (levels_tool->gamma_linear, high);
+
+ levels_update_input_bar (levels_tool);
+
+ delta = (high - low) / 2.0;
+ mid = low + delta;
+ tmp = log10 (1.0 / levels_config->gamma[levels_config->channel]);
+ value = mid + delta * tmp;
+
+ gtk_adjustment_set_value (levels_tool->gamma_linear, value);
+ }
+}
+
+static gboolean
+gimp_levels_tool_settings_import (GimpFilterTool *filter_tool,
+ GInputStream *input,
+ GError **error)
+{
+ GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
+ gchar header[64];
+ gsize bytes_read;
+
+ if (! g_input_stream_read_all (input, header, sizeof (header),
+ &bytes_read, NULL, error) ||
+ bytes_read != sizeof (header))
+ {
+ g_prefix_error (error, _("Could not read header: "));
+ return FALSE;
+ }
+
+ g_seekable_seek (G_SEEKABLE (input), 0, G_SEEK_SET, NULL, NULL);
+
+ if (g_str_has_prefix (header, "# GIMP Levels File\n"))
+ return gimp_levels_config_load_cruft (config, input, error);
+
+ return GIMP_FILTER_TOOL_CLASS (parent_class)->settings_import (filter_tool,
+ input,
+ error);
+}
+
+static gboolean
+gimp_levels_tool_settings_export (GimpFilterTool *filter_tool,
+ GOutputStream *output,
+ GError **error)
+{
+ GimpLevelsTool *tool = GIMP_LEVELS_TOOL (filter_tool);
+ GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
+
+ if (tool->export_old_format)
+ return gimp_levels_config_save_cruft (config, output, error);
+
+ return GIMP_FILTER_TOOL_CLASS (parent_class)->settings_export (filter_tool,
+ output,
+ error);
+}
+
+static void
+levels_input_adjust_by_color (GimpLevelsConfig *config,
+ guint value,
+ GimpHistogramChannel channel,
+ const GimpRGB *color)
+{
+ switch (value & 0xF)
+ {
+ case PICK_LOW_INPUT:
+ gimp_levels_config_adjust_by_colors (config, channel, color, NULL, NULL);
+ break;
+ case PICK_GAMMA:
+ gimp_levels_config_adjust_by_colors (config, channel, NULL, color, NULL);
+ break;
+ case PICK_HIGH_INPUT:
+ gimp_levels_config_adjust_by_colors (config, channel, NULL, NULL, color);
+ break;
+ default:
+ break;
+ }
+}
+
+static void
+gimp_levels_tool_color_picked (GimpFilterTool *color_tool,
+ gpointer identifier,
+ gdouble x,
+ gdouble y,
+ const Babl *sample_format,
+ const GimpRGB *color)
+{
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (color_tool);
+ GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
+ GimpRGB rgb = *color;
+ guint value = GPOINTER_TO_UINT (identifier);
+
+ if (config->linear)
+ babl_process (babl_fish (babl_format ("R'G'B'A double"),
+ babl_format ("RGBA double")),
+ &rgb, &rgb, 1);
+
+ if (value & PICK_ALL_CHANNELS &&
+ gimp_babl_format_get_base_type (sample_format) == GIMP_RGB)
+ {
+ GimpHistogramChannel channel;
+
+ /* first reset the value channel */
+ switch (value & 0xF)
+ {
+ case PICK_LOW_INPUT:
+ config->low_input[GIMP_HISTOGRAM_VALUE] = 0.0;
+ break;
+ case PICK_GAMMA:
+ config->gamma[GIMP_HISTOGRAM_VALUE] = 1.0;
+ break;
+ case PICK_HIGH_INPUT:
+ config->high_input[GIMP_HISTOGRAM_VALUE] = 1.0;
+ break;
+ default:
+ break;
+ }
+
+ /* then adjust all color channels */
+ for (channel = GIMP_HISTOGRAM_RED;
+ channel <= GIMP_HISTOGRAM_BLUE;
+ channel++)
+ {
+ levels_input_adjust_by_color (config, value, channel, &rgb);
+ }
+ }
+ else
+ {
+ levels_input_adjust_by_color (config, value, config->channel, &rgb);
+ }
+}
+
+static void
+gimp_levels_tool_export_setup (GimpSettingsBox *settings_box,
+ GtkFileChooserDialog *dialog,
+ gboolean export,
+ GimpLevelsTool *tool)
+{
+ GtkWidget *button;
+
+ if (! export)
+ return;
+
+ button = gtk_check_button_new_with_mnemonic (_("Use _old levels file format"));
+ gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button),
+ tool->export_old_format);
+ gtk_file_chooser_set_extra_widget (GTK_FILE_CHOOSER (dialog), button);
+ gtk_widget_show (button);
+
+ g_signal_connect (button, "toggled",
+ G_CALLBACK (gimp_toggle_button_update),
+ &tool->export_old_format);
+}
+
+static void
+levels_update_input_bar (GimpLevelsTool *tool)
+{
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
+ GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
+
+ switch (config->channel)
+ {
+ gdouble value;
+
+ case GIMP_HISTOGRAM_VALUE:
+ case GIMP_HISTOGRAM_ALPHA:
+ case GIMP_HISTOGRAM_RGB:
+ case GIMP_HISTOGRAM_LUMINANCE:
+ {
+ guchar v[256];
+ gint i;
+
+ for (i = 0; i < 256; i++)
+ {
+ value = gimp_operation_levels_map_input (config,
+ config->channel,
+ i / 255.0);
+ v[i] = CLAMP (value, 0.0, 1.0) * 255.999;
+ }
+
+ gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->input_bar),
+ v, v, v);
+ }
+ break;
+
+ case GIMP_HISTOGRAM_RED:
+ case GIMP_HISTOGRAM_GREEN:
+ case GIMP_HISTOGRAM_BLUE:
+ {
+ guchar r[256];
+ guchar g[256];
+ guchar b[256];
+ gint i;
+
+ for (i = 0; i < 256; i++)
+ {
+ value = gimp_operation_levels_map_input (config,
+ GIMP_HISTOGRAM_RED,
+ i / 255.0);
+ r[i] = CLAMP (value, 0.0, 1.0) * 255.999;
+
+ value = gimp_operation_levels_map_input (config,
+ GIMP_HISTOGRAM_GREEN,
+ i / 255.0);
+ g[i] = CLAMP (value, 0.0, 1.0) * 255.999;
+
+ value = gimp_operation_levels_map_input (config,
+ GIMP_HISTOGRAM_BLUE,
+ i / 255.0);
+ b[i] = CLAMP (value, 0.0, 1.0) * 255.999;
+ }
+
+ gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->input_bar),
+ r, g, b);
+ }
+ break;
+ }
+}
+
+static void
+levels_channel_callback (GtkWidget *widget,
+ GimpFilterTool *filter_tool)
+{
+ GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
+ gint value;
+
+ if (gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &value) &&
+ config->channel != value)
+ {
+ g_object_set (config,
+ "channel", value,
+ NULL);
+ }
+}
+
+static void
+levels_channel_reset_callback (GtkWidget *widget,
+ GimpFilterTool *filter_tool)
+{
+ gimp_levels_config_reset_channel (GIMP_LEVELS_CONFIG (filter_tool->config));
+}
+
+static gboolean
+levels_menu_sensitivity (gint value,
+ gpointer data)
+{
+ GimpDrawable *drawable = GIMP_TOOL (data)->drawable;
+ GimpHistogramChannel channel = value;
+
+ if (!drawable)
+ return FALSE;
+
+ switch (channel)
+ {
+ case GIMP_HISTOGRAM_VALUE:
+ return TRUE;
+
+ case GIMP_HISTOGRAM_RED:
+ case GIMP_HISTOGRAM_GREEN:
+ case GIMP_HISTOGRAM_BLUE:
+ return gimp_drawable_is_rgb (drawable);
+
+ case GIMP_HISTOGRAM_ALPHA:
+ return gimp_drawable_has_alpha (drawable);
+
+ case GIMP_HISTOGRAM_RGB:
+ return FALSE;
+
+ case GIMP_HISTOGRAM_LUMINANCE:
+ return FALSE;
+ }
+
+ return FALSE;
+}
+
+static void
+levels_stretch_callback (GtkWidget *widget,
+ GimpLevelsTool *levels_tool)
+{
+ GimpTool *tool = GIMP_TOOL (levels_tool);
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (levels_tool);
+ GimpWaitable *waitable;
+
+ waitable = gimp_trivially_cancelable_waitable_new (
+ GIMP_WAITABLE (levels_tool->histogram_async));
+
+ gimp_wait (tool->tool_info->gimp, waitable, _("Calculating histogram..."));
+
+ g_object_unref (waitable);
+
+ if (gimp_async_is_synced (levels_tool->histogram_async) &&
+ gimp_async_is_finished (levels_tool->histogram_async))
+ {
+ gimp_levels_config_stretch (GIMP_LEVELS_CONFIG (filter_tool->config),
+ levels_tool->histogram,
+ gimp_drawable_is_rgb (tool->drawable));
+ }
+}
+
+static void
+levels_linear_gamma_changed (GtkAdjustment *adjustment,
+ GimpLevelsTool *tool)
+{
+ gdouble low_input = gtk_adjustment_get_value (tool->low_input);
+ gdouble high_input = gtk_adjustment_get_value (tool->high_input);
+ gdouble delta, mid, tmp, value;
+
+ delta = (high_input - low_input) / 2.0;
+
+ if (delta >= 0.5)
+ {
+ mid = low_input + delta;
+ tmp = (gtk_adjustment_get_value (adjustment) - mid) / delta;
+ value = 1.0 / pow (10, tmp);
+
+ /* round the gamma value to the nearest 1/100th */
+ value = floor (value * 100 + 0.5) / 100.0;
+
+ gtk_adjustment_set_value (tool->gamma, value);
+ }
+}
+
+static void
+levels_to_curves_callback (GtkWidget *widget,
+ GimpFilterTool *filter_tool)
+{
+ GimpLevelsConfig *config = GIMP_LEVELS_CONFIG (filter_tool->config);
+ GimpCurvesConfig *curves;
+
+ curves = gimp_levels_config_to_curves_config (config);
+
+ gimp_filter_tool_edit_as (filter_tool,
+ "gimp-curves-tool",
+ GIMP_CONFIG (curves));
+
+ g_object_unref (curves);
+}