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-rw-r--r--app/tools/gimpcurvestool.c1156
1 files changed, 1156 insertions, 0 deletions
diff --git a/app/tools/gimpcurvestool.c b/app/tools/gimpcurvestool.c
new file mode 100644
index 0000000..d514323
--- /dev/null
+++ b/app/tools/gimpcurvestool.c
@@ -0,0 +1,1156 @@
+/* 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 <errno.h>
+
+#include <glib/gstdio.h>
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpconfig/gimpconfig.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "tools-types.h"
+
+#include "operations/gimpcurvesconfig.h"
+#include "operations/gimpoperationcurves.h"
+
+#include "core/gimp.h"
+#include "core/gimpcurve.h"
+#include "core/gimpcurve-map.h"
+#include "core/gimpdrawable.h"
+#include "core/gimpdrawable-histogram.h"
+#include "core/gimperror.h"
+#include "core/gimphistogram.h"
+#include "core/gimpimage.h"
+
+#include "widgets/gimpcolorbar.h"
+#include "widgets/gimpcurveview.h"
+#include "widgets/gimphelp-ids.h"
+#include "widgets/gimppropwidgets.h"
+#include "widgets/gimpwidgets-utils.h"
+
+#include "display/gimpdisplay.h"
+
+#include "gimpcurvestool.h"
+#include "gimphistogramoptions.h"
+
+#include "gimp-intl.h"
+
+
+#define GRAPH_SIZE 256
+#define BAR_SIZE 12
+#define RADIUS 4
+
+
+/* local function prototypes */
+
+static gboolean gimp_curves_tool_initialize (GimpTool *tool,
+ GimpDisplay *display,
+ GError **error);
+static void gimp_curves_tool_button_release (GimpTool *tool,
+ const GimpCoords *coords,
+ guint32 time,
+ GdkModifierType state,
+ GimpButtonReleaseType release_type,
+ GimpDisplay *display);
+static gboolean gimp_curves_tool_key_press (GimpTool *tool,
+ GdkEventKey *kevent,
+ GimpDisplay *display);
+static void gimp_curves_tool_oper_update (GimpTool *tool,
+ const GimpCoords *coords,
+ GdkModifierType state,
+ gboolean proximity,
+ GimpDisplay *display);
+
+static gchar * gimp_curves_tool_get_operation (GimpFilterTool *filter_tool,
+ gchar **description);
+static void gimp_curves_tool_dialog (GimpFilterTool *filter_tool);
+static void gimp_curves_tool_reset (GimpFilterTool *filter_tool);
+static void gimp_curves_tool_config_notify (GimpFilterTool *filter_tool,
+ GimpConfig *config,
+ const GParamSpec *pspec);
+static gboolean gimp_curves_tool_settings_import (GimpFilterTool *filter_tool,
+ GInputStream *input,
+ GError **error);
+static gboolean gimp_curves_tool_settings_export (GimpFilterTool *filter_tool,
+ GOutputStream *output,
+ GError **error);
+static void gimp_curves_tool_color_picked (GimpFilterTool *filter_tool,
+ gpointer identifier,
+ gdouble x,
+ gdouble y,
+ const Babl *sample_format,
+ const GimpRGB *color);
+
+static void gimp_curves_tool_export_setup (GimpSettingsBox *settings_box,
+ GtkFileChooserDialog *dialog,
+ gboolean export,
+ GimpCurvesTool *tool);
+static void gimp_curves_tool_update_channel (GimpCurvesTool *tool);
+static void gimp_curves_tool_update_point (GimpCurvesTool *tool);
+
+static void curves_curve_dirty_callback (GimpCurve *curve,
+ GimpCurvesTool *tool);
+
+static void curves_channel_callback (GtkWidget *widget,
+ GimpCurvesTool *tool);
+static void curves_channel_reset_callback (GtkWidget *widget,
+ GimpCurvesTool *tool);
+
+static gboolean curves_menu_sensitivity (gint value,
+ gpointer data);
+
+static void curves_graph_selection_callback (GtkWidget *widget,
+ GimpCurvesTool *tool);
+
+static void curves_point_coords_callback (GtkWidget *widget,
+ GimpCurvesTool *tool);
+static void curves_point_type_callback (GtkWidget *widget,
+ GimpCurvesTool *tool);
+
+static void curves_curve_type_callback (GtkWidget *widget,
+ GimpCurvesTool *tool);
+
+static gboolean curves_get_channel_color (GtkWidget *widget,
+ GimpHistogramChannel channel,
+ GimpRGB *color);
+
+
+G_DEFINE_TYPE (GimpCurvesTool, gimp_curves_tool, GIMP_TYPE_FILTER_TOOL)
+
+#define parent_class gimp_curves_tool_parent_class
+
+
+/* public functions */
+
+void
+gimp_curves_tool_register (GimpToolRegisterCallback callback,
+ gpointer data)
+{
+ (* callback) (GIMP_TYPE_CURVES_TOOL,
+ GIMP_TYPE_HISTOGRAM_OPTIONS,
+ gimp_color_options_gui,
+ 0,
+ "gimp-curves-tool",
+ _("Curves"),
+ _("Adjust color curves"),
+ N_("_Curves..."), NULL,
+ NULL, GIMP_HELP_TOOL_CURVES,
+ GIMP_ICON_TOOL_CURVES,
+ data);
+}
+
+
+/* private functions */
+
+static void
+gimp_curves_tool_class_init (GimpCurvesToolClass *klass)
+{
+ GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
+ GimpFilterToolClass *filter_tool_class = GIMP_FILTER_TOOL_CLASS (klass);
+
+ tool_class->initialize = gimp_curves_tool_initialize;
+ tool_class->button_release = gimp_curves_tool_button_release;
+ tool_class->key_press = gimp_curves_tool_key_press;
+ tool_class->oper_update = gimp_curves_tool_oper_update;
+
+ filter_tool_class->get_operation = gimp_curves_tool_get_operation;
+ filter_tool_class->dialog = gimp_curves_tool_dialog;
+ filter_tool_class->reset = gimp_curves_tool_reset;
+ filter_tool_class->config_notify = gimp_curves_tool_config_notify;
+ filter_tool_class->settings_import = gimp_curves_tool_settings_import;
+ filter_tool_class->settings_export = gimp_curves_tool_settings_export;
+ filter_tool_class->color_picked = gimp_curves_tool_color_picked;
+}
+
+static void
+gimp_curves_tool_init (GimpCurvesTool *tool)
+{
+ gint i;
+
+ for (i = 0; i < G_N_ELEMENTS (tool->picked_color); i++)
+ tool->picked_color[i] = -1.0;
+}
+
+static gboolean
+gimp_curves_tool_initialize (GimpTool *tool,
+ GimpDisplay *display,
+ GError **error)
+{
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
+ GimpCurvesTool *c_tool = GIMP_CURVES_TOOL (tool);
+ GimpImage *image = gimp_display_get_image (display);
+ GimpDrawable *drawable = gimp_image_get_active_drawable (image);
+ GimpCurvesConfig *config;
+ GimpHistogram *histogram;
+ GimpHistogramChannel channel;
+
+ if (! GIMP_TOOL_CLASS (parent_class)->initialize (tool, display, error))
+ {
+ return FALSE;
+ }
+
+ config = GIMP_CURVES_CONFIG (filter_tool->config);
+
+ histogram = gimp_histogram_new (config->linear);
+ g_object_unref (gimp_drawable_calculate_histogram_async (
+ drawable, histogram, FALSE));
+ gimp_histogram_view_set_background (GIMP_HISTOGRAM_VIEW (c_tool->graph),
+ histogram);
+ g_object_unref (histogram);
+
+ if (gimp_drawable_get_component_type (drawable) == GIMP_COMPONENT_TYPE_U8)
+ {
+ c_tool->scale = 255.0;
+
+ gtk_spin_button_set_digits (GTK_SPIN_BUTTON (c_tool->point_input), 0);
+ gtk_spin_button_set_digits (GTK_SPIN_BUTTON (c_tool->point_output), 0);
+
+ gtk_entry_set_width_chars (GTK_ENTRY (c_tool->point_input), 3);
+ gtk_entry_set_width_chars (GTK_ENTRY (c_tool->point_output), 3);
+ }
+ else
+ {
+ c_tool->scale = 100.0;
+
+ gtk_spin_button_set_digits (GTK_SPIN_BUTTON (c_tool->point_input), 2);
+ gtk_spin_button_set_digits (GTK_SPIN_BUTTON (c_tool->point_output), 2);
+
+ gtk_entry_set_width_chars (GTK_ENTRY (c_tool->point_input), 6);
+ gtk_entry_set_width_chars (GTK_ENTRY (c_tool->point_output), 6);
+ }
+
+ gimp_curve_view_set_range_x (GIMP_CURVE_VIEW (c_tool->graph),
+ 0, c_tool->scale);
+ gimp_curve_view_set_range_y (GIMP_CURVE_VIEW (c_tool->graph),
+ 0, c_tool->scale);
+
+ gtk_spin_button_set_range (GTK_SPIN_BUTTON (c_tool->point_output),
+ 0, c_tool->scale);
+
+ for (channel = GIMP_HISTOGRAM_VALUE;
+ channel <= GIMP_HISTOGRAM_ALPHA;
+ channel++)
+ {
+ g_signal_connect (config->curve[channel], "dirty",
+ G_CALLBACK (curves_curve_dirty_callback),
+ tool);
+ }
+
+ gimp_curves_tool_update_point (c_tool);
+
+ /* always pick colors */
+ gimp_filter_tool_enable_color_picking (filter_tool, NULL, FALSE);
+
+ return TRUE;
+}
+
+static void
+gimp_curves_tool_button_release (GimpTool *tool,
+ const GimpCoords *coords,
+ guint32 time,
+ GdkModifierType state,
+ GimpButtonReleaseType release_type,
+ GimpDisplay *display)
+{
+ GimpCurvesTool *c_tool = GIMP_CURVES_TOOL (tool);
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
+ GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
+
+ if (state & gimp_get_extend_selection_mask ())
+ {
+ GimpCurve *curve = config->curve[config->channel];
+ gdouble value = c_tool->picked_color[config->channel];
+ gint point;
+
+ point = gimp_curve_get_point_at (curve, value);
+
+ if (point < 0)
+ {
+ GimpCurvePointType type = GIMP_CURVE_POINT_SMOOTH;
+
+ point = gimp_curve_view_get_selected (
+ GIMP_CURVE_VIEW (c_tool->graph));
+
+ if (point >= 0)
+ type = gimp_curve_get_point_type (curve, point);
+
+ point = gimp_curve_add_point (
+ curve,
+ value, gimp_curve_map_value (curve, value));
+
+ gimp_curve_set_point_type (curve, point, type);
+ }
+
+ gimp_curve_view_set_selected (GIMP_CURVE_VIEW (c_tool->graph), point);
+ }
+ else if (state & gimp_get_toggle_behavior_mask ())
+ {
+ GimpHistogramChannel channel;
+ GimpCurvePointType type = GIMP_CURVE_POINT_SMOOTH;
+ gint point;
+
+ point = gimp_curve_view_get_selected (GIMP_CURVE_VIEW (c_tool->graph));
+
+ if (point >= 0)
+ {
+ type = gimp_curve_get_point_type (config->curve[config->channel],
+ point);
+ }
+
+ for (channel = GIMP_HISTOGRAM_VALUE;
+ channel <= GIMP_HISTOGRAM_ALPHA;
+ channel++)
+ {
+ GimpCurve *curve = config->curve[channel];
+ gdouble value = c_tool->picked_color[channel];
+
+ if (value != -1)
+ {
+ point = gimp_curve_get_point_at (curve, value);
+
+ if (point < 0)
+ {
+ point = gimp_curve_add_point (
+ curve,
+ value, gimp_curve_map_value (curve, value));
+
+ gimp_curve_set_point_type (curve, point, type);
+ }
+
+ if (channel == config->channel)
+ {
+ gimp_curve_view_set_selected (GIMP_CURVE_VIEW (c_tool->graph),
+ point);
+ }
+ }
+ }
+ }
+
+ /* chain up to halt the tool */
+ GIMP_TOOL_CLASS (parent_class)->button_release (tool, coords, time, state,
+ release_type, display);
+}
+
+static gboolean
+gimp_curves_tool_key_press (GimpTool *tool,
+ GdkEventKey *kevent,
+ GimpDisplay *display)
+{
+ GimpCurvesTool *c_tool = GIMP_CURVES_TOOL (tool);
+
+ if (tool->display && c_tool->graph)
+ {
+ if (gtk_widget_event (c_tool->graph, (GdkEvent *) kevent))
+ return TRUE;
+ }
+
+ return GIMP_TOOL_CLASS (parent_class)->key_press (tool, kevent, display);
+}
+
+static void
+gimp_curves_tool_oper_update (GimpTool *tool,
+ const GimpCoords *coords,
+ GdkModifierType state,
+ gboolean proximity,
+ GimpDisplay *display)
+{
+ if (gimp_filter_tool_on_guide (GIMP_FILTER_TOOL (tool),
+ coords, display))
+ {
+ GIMP_TOOL_CLASS (parent_class)->oper_update (tool, coords, state, proximity,
+ display);
+ }
+ else
+ {
+ GimpColorPickTarget target;
+ gchar *status = NULL;
+ GdkModifierType extend_mask = gimp_get_extend_selection_mask ();
+ GdkModifierType toggle_mask = gimp_get_toggle_behavior_mask ();
+
+ gimp_tool_pop_status (tool, display);
+
+ if (state & extend_mask)
+ {
+ target = GIMP_COLOR_PICK_TARGET_PALETTE;
+ status = g_strdup (_("Click to add a control point"));
+ }
+ else if (state & toggle_mask)
+ {
+ target = GIMP_COLOR_PICK_TARGET_PALETTE;
+ status = g_strdup (_("Click to add control points to all channels"));
+ }
+ else
+ {
+ target = GIMP_COLOR_PICK_TARGET_NONE;
+ status = gimp_suggest_modifiers (_("Click to locate on curve"),
+ (extend_mask | toggle_mask) & ~state,
+ _("%s: add control point"),
+ _("%s: add control points to all channels"),
+ NULL);
+ }
+
+ GIMP_COLOR_TOOL (tool)->pick_target = target;
+
+ if (proximity)
+ gimp_tool_push_status (tool, display, "%s", status);
+
+ g_free (status);
+ }
+}
+
+static gchar *
+gimp_curves_tool_get_operation (GimpFilterTool *filter_tool,
+ gchar **description)
+{
+ *description = g_strdup (_("Adjust Color Curves"));
+
+ return g_strdup ("gimp:curves");
+}
+
+
+/*******************/
+/* Curves dialog */
+/*******************/
+
+static void
+gimp_curves_tool_dialog (GimpFilterTool *filter_tool)
+{
+ GimpCurvesTool *tool = GIMP_CURVES_TOOL (filter_tool);
+ GimpToolOptions *tool_options = GIMP_TOOL_GET_OPTIONS (filter_tool);
+ GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
+ GtkListStore *store;
+ GtkWidget *main_vbox;
+ GtkWidget *frame_vbox;
+ GtkWidget *vbox;
+ GtkWidget *hbox;
+ GtkWidget *hbox2;
+ GtkWidget *label;
+ GtkWidget *main_frame;
+ GtkWidget *frame;
+ GtkWidget *table;
+ GtkWidget *button;
+ GtkWidget *bar;
+ GtkWidget *combo;
+
+ g_signal_connect (filter_tool->settings_box, "file-dialog-setup",
+ G_CALLBACK (gimp_curves_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_int_combo_box_set_active (GIMP_INT_COMBO_BOX (tool->channel_menu),
+ config->channel);
+ 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),
+ curves_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 (curves_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 (curves_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 curves in linear light"),
+ _("Adjust curves 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);
+
+ /* The table for the color bars and the graph */
+ table = gtk_table_new (2, 2, FALSE);
+ gtk_table_set_col_spacings (GTK_TABLE (table), 2);
+ gtk_table_set_row_spacings (GTK_TABLE (table), 2);
+ gtk_box_pack_start (GTK_BOX (frame_vbox), table, TRUE, TRUE, 0);
+
+ /* The left color bar */
+ vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+ gtk_table_attach (GTK_TABLE (table), vbox, 0, 1, 0, 1,
+ GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
+ 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, RADIUS);
+ gtk_widget_show (frame);
+
+ tool->yrange = gimp_color_bar_new (GTK_ORIENTATION_VERTICAL);
+ gtk_widget_set_size_request (tool->yrange, BAR_SIZE, -1);
+ gtk_container_add (GTK_CONTAINER (frame), tool->yrange);
+ gtk_widget_show (tool->yrange);
+
+ /* The curves graph */
+ frame = gtk_frame_new (NULL);
+ gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
+ gtk_table_attach (GTK_TABLE (table), frame, 1, 2, 0, 1,
+ GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
+ gtk_widget_show (frame);
+
+ tool->graph = gimp_curve_view_new ();
+
+ g_object_add_weak_pointer (G_OBJECT (tool->graph),
+ (gpointer) &tool->graph);
+
+ gimp_curve_view_set_range_x (GIMP_CURVE_VIEW (tool->graph), 0, 255);
+ gimp_curve_view_set_range_y (GIMP_CURVE_VIEW (tool->graph), 0, 255);
+ gtk_widget_set_size_request (tool->graph,
+ GRAPH_SIZE + RADIUS * 2,
+ GRAPH_SIZE + RADIUS * 2);
+ g_object_set (tool->graph,
+ "border-width", RADIUS,
+ "subdivisions", 1,
+ NULL);
+ gtk_container_add (GTK_CONTAINER (frame), tool->graph);
+ gtk_widget_show (tool->graph);
+
+ g_object_bind_property (G_OBJECT (tool_options), "histogram-scale",
+ G_OBJECT (tool->graph), "histogram-scale",
+ G_BINDING_SYNC_CREATE |
+ G_BINDING_BIDIRECTIONAL);
+
+ g_signal_connect (tool->graph, "selection-changed",
+ G_CALLBACK (curves_graph_selection_callback),
+ tool);
+
+ /* The bottom color bar */
+ hbox2 = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
+ gtk_table_attach (GTK_TABLE (table), hbox2, 1, 2, 1, 2,
+ GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
+ gtk_widget_show (hbox2);
+
+ frame = gtk_frame_new (NULL);
+ gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
+ gtk_box_pack_start (GTK_BOX (hbox2), frame, TRUE, TRUE, RADIUS);
+ gtk_widget_show (frame);
+
+ vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+ gtk_box_set_homogeneous (GTK_BOX (vbox), TRUE);
+ gtk_container_add (GTK_CONTAINER (frame), vbox);
+ gtk_widget_show (vbox);
+
+ tool->xrange = gimp_color_bar_new (GTK_ORIENTATION_HORIZONTAL);
+ gtk_widget_set_size_request (tool->xrange, -1, BAR_SIZE / 2);
+ gtk_box_pack_start (GTK_BOX (vbox), tool->xrange, TRUE, TRUE, 0);
+ gtk_widget_show (tool->xrange);
+
+ bar = gimp_color_bar_new (GTK_ORIENTATION_HORIZONTAL);
+ gtk_box_pack_start (GTK_BOX (vbox), bar, TRUE, TRUE, 0);
+ gtk_widget_show (bar);
+
+ gtk_widget_show (table);
+
+ /* The point properties box */
+ tool->point_box = hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+ gtk_box_pack_start (GTK_BOX (frame_vbox), hbox, FALSE, FALSE, 0);
+ gtk_widget_show (tool->point_box);
+
+ label = gtk_label_new_with_mnemonic (_("_Input:"));
+ gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
+ gtk_widget_show (label);
+
+ tool->point_input = gimp_spin_button_new_with_range (0.0, 0.0, 1.0);
+ gtk_box_pack_start (GTK_BOX (hbox), tool->point_input, FALSE, FALSE, 0);
+ gtk_widget_show (tool->point_input);
+
+ g_signal_connect (tool->point_input, "value-changed",
+ G_CALLBACK (curves_point_coords_callback),
+ tool);
+
+ gtk_label_set_mnemonic_widget (GTK_LABEL (label), tool->point_input);
+
+ label = gtk_label_new_with_mnemonic (_("O_utput:"));
+ gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
+ gtk_widget_show (label);
+
+ tool->point_output = gimp_spin_button_new_with_range (0.0, 0.0, 1.0);
+ gtk_box_pack_start (GTK_BOX (hbox), tool->point_output, FALSE, FALSE, 0);
+ gtk_widget_show (tool->point_output);
+
+ g_signal_connect (tool->point_output, "value-changed",
+ G_CALLBACK (curves_point_coords_callback),
+ tool);
+
+ gtk_label_set_mnemonic_widget (GTK_LABEL (label), tool->point_output);
+
+ label = gtk_label_new_with_mnemonic (_("T_ype:"));
+ gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
+ gtk_widget_show (label);
+
+ hbox2 = gimp_enum_icon_box_new (GIMP_TYPE_CURVE_POINT_TYPE,
+ "gimp-curve-point",
+ GTK_ICON_SIZE_MENU,
+ G_CALLBACK (curves_point_type_callback),
+ tool,
+ &tool->point_type);
+ gtk_box_pack_start (GTK_BOX (hbox), hbox2, FALSE, FALSE, 0);
+ gtk_widget_show (hbox2);
+
+ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+ gtk_box_pack_start (GTK_BOX (frame_vbox), hbox, FALSE, FALSE, 0);
+ gtk_widget_show (hbox);
+
+ gtk_label_set_mnemonic_widget (GTK_LABEL (label), tool->point_type);
+
+ label = gtk_label_new_with_mnemonic (_("Curve _type:"));
+ gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
+ gtk_widget_show (label);
+
+ /* The curve-type combo */
+ tool->curve_type = combo = gimp_enum_combo_box_new (GIMP_TYPE_CURVE_TYPE);
+ gimp_enum_combo_box_set_icon_prefix (GIMP_ENUM_COMBO_BOX (combo),
+ "gimp-curve");
+ gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), 0,
+ G_CALLBACK (curves_curve_type_callback),
+ tool);
+ gtk_box_pack_start (GTK_BOX (hbox), combo, TRUE, TRUE, 0);
+ gtk_widget_show (combo);
+
+ gtk_label_set_mnemonic_widget (GTK_LABEL (label), combo);
+
+ gimp_curves_tool_update_channel (tool);
+}
+
+static void
+gimp_curves_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_curves_tool_config_notify (GimpFilterTool *filter_tool,
+ GimpConfig *config,
+ const GParamSpec *pspec)
+{
+ GimpCurvesTool *curves_tool = GIMP_CURVES_TOOL (filter_tool);
+ GimpCurvesConfig *curves_config = GIMP_CURVES_CONFIG (config);
+ GimpCurve *curve = curves_config->curve[curves_config->channel];
+
+ GIMP_FILTER_TOOL_CLASS (parent_class)->config_notify (filter_tool,
+ config, pspec);
+
+ if (! curves_tool->channel_menu ||
+ ! curves_tool->graph)
+ return;
+
+ if (! strcmp (pspec->name, "linear"))
+ {
+ GimpHistogram *histogram;
+
+ histogram = gimp_histogram_new (curves_config->linear);
+ g_object_unref (gimp_drawable_calculate_histogram_async (
+ GIMP_TOOL (filter_tool)->drawable, histogram, FALSE));
+ gimp_histogram_view_set_background (GIMP_HISTOGRAM_VIEW (curves_tool->graph),
+ histogram);
+ g_object_unref (histogram);
+ }
+ else if (! strcmp (pspec->name, "channel"))
+ {
+ gimp_curves_tool_update_channel (GIMP_CURVES_TOOL (filter_tool));
+ }
+ else if (! strcmp (pspec->name, "curve"))
+ {
+ gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (curves_tool->curve_type),
+ curve->curve_type);
+ }
+}
+
+static gboolean
+gimp_curves_tool_settings_import (GimpFilterTool *filter_tool,
+ GInputStream *input,
+ GError **error)
+{
+ GimpCurvesConfig *config = GIMP_CURVES_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 Curves File\n"))
+ return gimp_curves_config_load_cruft (config, input, error);
+
+ return GIMP_FILTER_TOOL_CLASS (parent_class)->settings_import (filter_tool,
+ input,
+ error);
+}
+
+static gboolean
+gimp_curves_tool_settings_export (GimpFilterTool *filter_tool,
+ GOutputStream *output,
+ GError **error)
+{
+ GimpCurvesTool *tool = GIMP_CURVES_TOOL (filter_tool);
+ GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
+
+ if (tool->export_old_format)
+ return gimp_curves_config_save_cruft (config, output, error);
+
+ return GIMP_FILTER_TOOL_CLASS (parent_class)->settings_export (filter_tool,
+ output,
+ error);
+}
+
+static void
+gimp_curves_tool_color_picked (GimpFilterTool *filter_tool,
+ gpointer identifier,
+ gdouble x,
+ gdouble y,
+ const Babl *sample_format,
+ const GimpRGB *color)
+{
+ GimpCurvesTool *tool = GIMP_CURVES_TOOL (filter_tool);
+ GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
+ GimpDrawable *drawable = GIMP_TOOL (tool)->drawable;
+ GimpRGB rgb = *color;
+
+ if (config->linear)
+ babl_process (babl_fish (babl_format ("R'G'B'A double"),
+ babl_format ("RGBA double")),
+ &rgb, &rgb, 1);
+
+ tool->picked_color[GIMP_HISTOGRAM_RED] = rgb.r;
+ tool->picked_color[GIMP_HISTOGRAM_GREEN] = rgb.g;
+ tool->picked_color[GIMP_HISTOGRAM_BLUE] = rgb.b;
+
+ if (gimp_drawable_has_alpha (drawable))
+ tool->picked_color[GIMP_HISTOGRAM_ALPHA] = rgb.a;
+ else
+ tool->picked_color[GIMP_HISTOGRAM_ALPHA] = -1;
+
+ tool->picked_color[GIMP_HISTOGRAM_VALUE] = MAX (MAX (rgb.r, rgb.g), rgb.b);
+
+ gimp_curve_view_set_xpos (GIMP_CURVE_VIEW (tool->graph),
+ tool->picked_color[config->channel]);
+}
+
+static void
+gimp_curves_tool_export_setup (GimpSettingsBox *settings_box,
+ GtkFileChooserDialog *dialog,
+ gboolean export,
+ GimpCurvesTool *tool)
+{
+ GtkWidget *button;
+
+ if (! export)
+ return;
+
+ button = gtk_check_button_new_with_mnemonic (_("Use _old curves 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
+gimp_curves_tool_update_channel (GimpCurvesTool *tool)
+{
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
+ GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
+ GimpCurve *curve = config->curve[config->channel];
+ GimpHistogramChannel channel;
+
+ gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (tool->channel_menu),
+ config->channel);
+
+ switch (config->channel)
+ {
+ guchar r[256];
+ guchar g[256];
+ guchar b[256];
+
+ case GIMP_HISTOGRAM_VALUE:
+ case GIMP_HISTOGRAM_ALPHA:
+ case GIMP_HISTOGRAM_RGB:
+ case GIMP_HISTOGRAM_LUMINANCE:
+ gimp_curve_get_uchar (curve, sizeof (r), r);
+
+ gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->xrange),
+ r, r, r);
+ break;
+
+ case GIMP_HISTOGRAM_RED:
+ case GIMP_HISTOGRAM_GREEN:
+ case GIMP_HISTOGRAM_BLUE:
+ gimp_curve_get_uchar (config->curve[GIMP_HISTOGRAM_RED],
+ sizeof (r), r);
+ gimp_curve_get_uchar (config->curve[GIMP_HISTOGRAM_GREEN],
+ sizeof (g), g);
+ gimp_curve_get_uchar (config->curve[GIMP_HISTOGRAM_BLUE],
+ sizeof (b), b);
+
+ gimp_color_bar_set_buffers (GIMP_COLOR_BAR (tool->xrange),
+ r, g, b);
+ break;
+ }
+
+ gimp_histogram_view_set_channel (GIMP_HISTOGRAM_VIEW (tool->graph),
+ config->channel);
+ gimp_curve_view_set_xpos (GIMP_CURVE_VIEW (tool->graph),
+ tool->picked_color[config->channel]);
+
+ gimp_color_bar_set_channel (GIMP_COLOR_BAR (tool->yrange),
+ config->channel);
+
+ gimp_curve_view_remove_all_backgrounds (GIMP_CURVE_VIEW (tool->graph));
+
+ for (channel = GIMP_HISTOGRAM_VALUE;
+ channel <= GIMP_HISTOGRAM_ALPHA;
+ channel++)
+ {
+ GimpRGB curve_color;
+ gboolean has_color;
+
+ has_color = curves_get_channel_color (tool->graph, channel, &curve_color);
+
+ if (channel == config->channel)
+ {
+ gimp_curve_view_set_curve (GIMP_CURVE_VIEW (tool->graph), curve,
+ has_color ? &curve_color : NULL);
+ }
+ else
+ {
+ gimp_curve_view_add_background (GIMP_CURVE_VIEW (tool->graph),
+ config->curve[channel],
+ has_color ? &curve_color : NULL);
+ }
+ }
+
+ gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (tool->curve_type),
+ curve->curve_type);
+
+ gimp_curves_tool_update_point (tool);
+}
+
+static void
+gimp_curves_tool_update_point (GimpCurvesTool *tool)
+{
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
+ GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
+ GimpCurve *curve = config->curve[config->channel];
+ gint point;
+
+ point = gimp_curve_view_get_selected (GIMP_CURVE_VIEW (tool->graph));
+
+ gtk_widget_set_sensitive (tool->point_box, point >= 0);
+
+ if (point >= 0)
+ {
+ gdouble min = 0.0;
+ gdouble max = 1.0;
+ gdouble x;
+ gdouble y;
+
+ if (point > 0)
+ gimp_curve_get_point (curve, point - 1, &min, NULL);
+
+ if (point < gimp_curve_get_n_points (curve) - 1)
+ gimp_curve_get_point (curve, point + 1, &max, NULL);
+
+ gimp_curve_get_point (curve, point, &x, &y);
+
+ x *= tool->scale;
+ y *= tool->scale;
+ min *= tool->scale;
+ max *= tool->scale;
+
+ g_signal_handlers_block_by_func (tool->point_input,
+ curves_point_coords_callback,
+ tool);
+ g_signal_handlers_block_by_func (tool->point_output,
+ curves_point_coords_callback,
+ tool);
+
+ gtk_spin_button_set_range (GTK_SPIN_BUTTON (tool->point_input), min, max);
+
+ gtk_spin_button_set_value (GTK_SPIN_BUTTON (tool->point_input), x);
+ gtk_spin_button_set_value (GTK_SPIN_BUTTON (tool->point_output), y);
+
+
+ g_signal_handlers_unblock_by_func (tool->point_input,
+ curves_point_coords_callback,
+ tool);
+ g_signal_handlers_unblock_by_func (tool->point_output,
+ curves_point_coords_callback,
+ tool);
+
+ g_signal_handlers_block_by_func (tool->point_type,
+ curves_point_type_callback,
+ tool);
+
+ gimp_int_radio_group_set_active (
+ GTK_RADIO_BUTTON (tool->point_type),
+ gimp_curve_get_point_type (curve, point));
+
+ g_signal_handlers_unblock_by_func (tool->point_type,
+ curves_point_type_callback,
+ tool);
+ }
+}
+
+static void
+curves_curve_dirty_callback (GimpCurve *curve,
+ GimpCurvesTool *tool)
+{
+ if (tool->graph &&
+ gimp_curve_view_get_curve (GIMP_CURVE_VIEW (tool->graph)) == curve)
+ {
+ gimp_curves_tool_update_point (tool);
+ }
+}
+
+static void
+curves_channel_callback (GtkWidget *widget,
+ GimpCurvesTool *tool)
+{
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
+ GimpCurvesConfig *config = GIMP_CURVES_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
+curves_channel_reset_callback (GtkWidget *widget,
+ GimpCurvesTool *tool)
+{
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
+ GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
+
+ gimp_curve_reset (config->curve[config->channel], FALSE);
+}
+
+static gboolean
+curves_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
+curves_graph_selection_callback (GtkWidget *widget,
+ GimpCurvesTool *tool)
+{
+ gimp_curves_tool_update_point (tool);
+}
+
+static void
+curves_point_coords_callback (GtkWidget *widget,
+ GimpCurvesTool *tool)
+{
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
+ GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
+ GimpCurve *curve = config->curve[config->channel];
+ gint point;
+
+ point = gimp_curve_view_get_selected (GIMP_CURVE_VIEW (tool->graph));
+
+ if (point >= 0)
+ {
+ gdouble x;
+ gdouble y;
+
+ x = gtk_spin_button_get_value (GTK_SPIN_BUTTON (tool->point_input));
+ y = gtk_spin_button_get_value (GTK_SPIN_BUTTON (tool->point_output));
+
+ x /= tool->scale;
+ y /= tool->scale;
+
+ gimp_curve_set_point (curve, point, x, y);
+ }
+}
+
+static void
+curves_point_type_callback (GtkWidget *widget,
+ GimpCurvesTool *tool)
+{
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
+ GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
+ GimpCurve *curve = config->curve[config->channel];
+ gint point;
+
+ point = gimp_curve_view_get_selected (GIMP_CURVE_VIEW (tool->graph));
+
+ if (point >= 0 && gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
+ {
+ GimpCurvePointType type;
+
+ type = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (widget),
+ "gimp-item-data"));
+
+ gimp_curve_set_point_type (curve, point, type);
+ }
+}
+
+static void
+curves_curve_type_callback (GtkWidget *widget,
+ GimpCurvesTool *tool)
+{
+ gint value;
+
+ if (gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &value))
+ {
+ GimpFilterTool *filter_tool = GIMP_FILTER_TOOL (tool);
+ GimpCurvesConfig *config = GIMP_CURVES_CONFIG (filter_tool->config);
+ GimpCurveType curve_type = value;
+
+ if (config->curve[config->channel]->curve_type != curve_type)
+ gimp_curve_set_curve_type (config->curve[config->channel], curve_type);
+ }
+}
+
+static gboolean
+curves_get_channel_color (GtkWidget *widget,
+ GimpHistogramChannel channel,
+ GimpRGB *color)
+{
+ static const GimpRGB channel_colors[GIMP_HISTOGRAM_RGB] =
+ {
+ { 0.0, 0.0, 0.0, 1.0 },
+ { 1.0, 0.0, 0.0, 1.0 },
+ { 0.0, 1.0, 0.0, 1.0 },
+ { 0.0, 0.0, 1.0, 1.0 },
+ { 0.5, 0.5, 0.5, 1.0 }
+ };
+
+ if (channel == GIMP_HISTOGRAM_VALUE)
+ return FALSE;
+
+ if (channel == GIMP_HISTOGRAM_ALPHA)
+ {
+ GtkStyle *style = gtk_widget_get_style (widget);
+
+ gimp_rgba_set (color,
+ style->text_aa[GTK_STATE_NORMAL].red / 65535.0,
+ style->text_aa[GTK_STATE_NORMAL].green / 65535.0,
+ style->text_aa[GTK_STATE_NORMAL].blue / 65535.0,
+ 1.0);
+ return TRUE;
+ }
+
+ *color = channel_colors[channel];
+ return TRUE;
+}