[gimp] app: add a "Convert Precision" dialog for choosing dithering options



commit 0ca03e88275a50e2fa3be3a2a2dce1d6107831fc
Author: Michael Natterer <mitch gimp org>
Date:   Sun Sep 23 23:46:11 2012 +0200

    app: add a "Convert Precision" dialog for choosing dithering options
    
    Does absolutely nothing yet.

 app/actions/image-commands.c           |   48 ++++++-
 app/core/gimpimage-convert-precision.c |    2 +
 app/core/gimpimage-convert-precision.h |    2 +
 app/dialogs/Makefile.am                |    2 +
 app/dialogs/convert-precision-dialog.c |  260 ++++++++++++++++++++++++++++++++
 app/dialogs/convert-precision-dialog.h |   29 ++++
 app/pdb/convert-cmds.c                 |    2 +-
 app/widgets/gimphelp-ids.h             |    1 +
 libgimpwidgets/gimpstock.h             |    1 +
 po/POTFILES.in                         |    1 +
 tools/pdbgen/pdb/convert.pdb           |    2 +-
 11 files changed, 344 insertions(+), 6 deletions(-)
---
diff --git a/app/actions/image-commands.c b/app/actions/image-commands.c
index 8191b09..e792198 100644
--- a/app/actions/image-commands.c
+++ b/app/actions/image-commands.c
@@ -52,6 +52,7 @@
 #include "display/gimpdisplay.h"
 #include "display/gimpdisplayshell.h"
 
+#include "dialogs/convert-precision-dialog.h"
 #include "dialogs/convert-type-dialog.h"
 #include "dialogs/grid-dialog.h"
 #include "dialogs/image-merge-layers-dialog.h"
@@ -67,7 +68,8 @@
 #include "gimp-intl.h"
 
 
-#define IMAGE_CONVERT_TYPE_DIALOG_KEY "image-convert-type-dialog"
+#define IMAGE_CONVERT_PRECISION_DIALOG_KEY "image-convert-precision-dialog"
+#define IMAGE_CONVERT_TYPE_DIALOG_KEY      "image-convert-type-dialog"
 
 
 typedef struct
@@ -150,7 +152,7 @@ image_new_cmd_callback (GtkAction *action,
 }
 
 static void
-image_convert_dialog_unset (GtkWidget *widget)
+image_convert_type_dialog_unset (GtkWidget *widget)
 {
   g_object_set_data (G_OBJECT (widget), IMAGE_CONVERT_TYPE_DIALOG_KEY, NULL);
 }
@@ -208,7 +210,7 @@ image_convert_base_type_cmd_callback (GtkAction *action,
                                IMAGE_CONVERT_TYPE_DIALOG_KEY, dialog);
 
             g_signal_connect_object (dialog, "destroy",
-                                     G_CALLBACK (image_convert_dialog_unset),
+                                     G_CALLBACK (image_convert_type_dialog_unset),
                                      widget, G_CONNECT_SWAPPED);
           }
 
@@ -220,15 +222,23 @@ image_convert_base_type_cmd_callback (GtkAction *action,
   gimp_image_flush (image);
 }
 
+static void
+image_convert_precision_dialog_unset (GtkWidget *widget)
+{
+  g_object_set_data (G_OBJECT (widget), IMAGE_CONVERT_PRECISION_DIALOG_KEY, NULL);
+}
+
 void
 image_convert_precision_cmd_callback (GtkAction *action,
                                       GtkAction *current,
                                       gpointer   data)
 {
   GimpImage     *image;
+  GtkWidget     *widget;
   GimpDisplay   *display;
   GimpPrecision  value;
   return_if_no_image (image, data);
+  return_if_no_widget (widget, data);
   return_if_no_display (display, data);
 
   value = gtk_radio_action_get_current_value (GTK_RADIO_ACTION (action));
@@ -236,7 +246,37 @@ image_convert_precision_cmd_callback (GtkAction *action,
   if (value == gimp_image_get_precision (image))
     return;
 
-  gimp_image_convert_precision (image, value, GIMP_PROGRESS (display));
+  if (value < gimp_image_get_precision (image))
+    {
+      GtkWidget *dialog;
+
+      dialog = g_object_get_data (G_OBJECT (widget),
+                                  IMAGE_CONVERT_PRECISION_DIALOG_KEY);
+
+      if (! dialog)
+        {
+          dialog = convert_precision_dialog_new (image,
+                                                 action_data_get_context (data),
+                                                 widget,
+                                                 value,
+                                                 GIMP_PROGRESS (display));
+
+          g_object_set_data (G_OBJECT (widget),
+                             IMAGE_CONVERT_PRECISION_DIALOG_KEY, dialog);
+
+          g_signal_connect_object (dialog, "destroy",
+                                   G_CALLBACK (image_convert_precision_dialog_unset),
+                                   widget, G_CONNECT_SWAPPED);
+        }
+
+      gtk_window_present (GTK_WINDOW (dialog));
+    }
+  else
+    {
+      gimp_image_convert_precision (image, value, 0, 0,
+                                    GIMP_PROGRESS (display));
+    }
+
   gimp_image_flush (image);
 }
 
diff --git a/app/core/gimpimage-convert-precision.c b/app/core/gimpimage-convert-precision.c
index 7243ffd..b009c92 100644
--- a/app/core/gimpimage-convert-precision.c
+++ b/app/core/gimpimage-convert-precision.c
@@ -39,6 +39,8 @@
 void
 gimp_image_convert_precision (GimpImage     *image,
                               GimpPrecision  precision,
+                              gint           layer_dither_type,
+                              gint           mask_dither_type,
                               GimpProgress  *progress)
 {
   GList       *all_drawables;
diff --git a/app/core/gimpimage-convert-precision.h b/app/core/gimpimage-convert-precision.h
index 84ed212..617eea8 100644
--- a/app/core/gimpimage-convert-precision.h
+++ b/app/core/gimpimage-convert-precision.h
@@ -24,6 +24,8 @@
 
 void   gimp_image_convert_precision (GimpImage     *image,
                                      GimpPrecision  precision,
+                                     gint           layer_dither_type,
+                                     gint           mask_dither_type,
                                      GimpProgress  *progress);
 
 
diff --git a/app/dialogs/Makefile.am b/app/dialogs/Makefile.am
index c6ae168..45e7d4a 100644
--- a/app/dialogs/Makefile.am
+++ b/app/dialogs/Makefile.am
@@ -25,6 +25,8 @@ libappdialogs_a_sources = \
 	about-dialog.h			\
 	channel-options-dialog.c	\
 	channel-options-dialog.h	\
+	convert-precision-dialog.c	\
+	convert-precision-dialog.h	\
 	convert-type-dialog.c		\
 	convert-type-dialog.h		\
 	data-delete-dialog.c		\
diff --git a/app/dialogs/convert-precision-dialog.c b/app/dialogs/convert-precision-dialog.c
new file mode 100644
index 0000000..bf06eaf
--- /dev/null
+++ b/app/dialogs/convert-precision-dialog.c
@@ -0,0 +1,260 @@
+/* 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpwidgets/gimpwidgets.h"
+
+#include "dialogs-types.h"
+
+#include "core/gimp.h"
+#include "core/gimpcontext.h"
+#include "core/gimpimage.h"
+#include "core/gimpimage-convert-precision.h"
+#include "core/gimplist.h"
+#include "core/gimpprogress.h"
+
+#include "widgets/gimphelp-ids.h"
+#include "widgets/gimpviewablebox.h"
+#include "widgets/gimpviewabledialog.h"
+#include "widgets/gimpwidgets-utils.h"
+
+#include "convert-precision-dialog.h"
+
+#include "gimp-intl.h"
+
+
+typedef struct
+{
+  GtkWidget     *dialog;
+
+  GimpImage     *image;
+  GimpProgress  *progress;
+  GimpContext   *context;
+
+  GimpPrecision  precision;
+  gint           layer_dither_type;
+  gint           mask_dither_type;
+} ConvertDialog;
+
+
+static void   convert_precision_dialog_response (GtkWidget        *widget,
+                                                 gint              response_id,
+                                                 ConvertDialog    *dialog);
+static void   convert_precision_dialog_free     (ConvertDialog    *dialog);
+
+
+/*  defaults  */
+
+static gint   saved_layer_dither_type = 0;
+static gint   saved_mask_dither_type  = 0;
+
+
+/*  public functions  */
+
+GtkWidget *
+convert_precision_dialog_new (GimpImage     *image,
+                              GimpContext   *context,
+                              GtkWidget     *parent,
+                              GimpPrecision  precision,
+                              GimpProgress  *progress)
+{
+  ConvertDialog *dialog;
+  GtkWidget     *button;
+  GtkWidget     *main_vbox;
+  GtkWidget     *vbox;
+  GtkWidget     *hbox;
+  GtkWidget     *label;
+  GtkWidget     *frame;
+  GtkWidget     *combo;
+  GtkSizeGroup  *size_group;
+  const gchar   *enum_desc;
+  gchar         *blurb;
+  GType          operation_type;
+  GParamSpec    *dither_pspec;
+  GType          dither_type;
+
+  g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
+  g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
+  g_return_val_if_fail (GTK_IS_WIDGET (parent), NULL);
+  g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
+
+  dialog = g_slice_new0 (ConvertDialog);
+
+  dialog->image             = image;
+  dialog->precision         = precision;
+  dialog->progress          = progress;
+  dialog->layer_dither_type = saved_layer_dither_type;
+  dialog->mask_dither_type  = saved_mask_dither_type;
+
+  gimp_enum_get_value (GIMP_TYPE_PRECISION, precision,
+                       NULL, NULL, &enum_desc, NULL);
+
+  blurb = g_strdup_printf (_("Convert Image to %s"), enum_desc);
+
+  dialog->dialog =
+    gimp_viewable_dialog_new (GIMP_VIEWABLE (image), context,
+                              _("Precision Conversion"),
+                              "gimp-image-convert-precision",
+                              GIMP_STOCK_CONVERT_PRECISION,
+                              blurb,
+                              parent,
+                              gimp_standard_help_func,
+                              GIMP_HELP_IMAGE_CONVERT_PRECISION,
+
+                              GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
+
+                              NULL);
+
+  g_free (blurb);
+
+  button = gtk_dialog_add_button (GTK_DIALOG (dialog->dialog),
+                                  _("C_onvert"), GTK_RESPONSE_OK);
+  gtk_button_set_image (GTK_BUTTON (button),
+                        gtk_image_new_from_stock (GIMP_STOCK_CONVERT_PRECISION,
+                                                  GTK_ICON_SIZE_BUTTON));
+
+  gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog->dialog),
+                                           GTK_RESPONSE_OK,
+                                           GTK_RESPONSE_CANCEL,
+                                           -1);
+
+  gtk_window_set_resizable (GTK_WINDOW (dialog->dialog), FALSE);
+
+  g_object_weak_ref (G_OBJECT (dialog->dialog),
+                     (GWeakNotify) convert_precision_dialog_free, dialog);
+
+  g_signal_connect (dialog->dialog, "response",
+                    G_CALLBACK (convert_precision_dialog_response),
+                    dialog);
+
+  main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
+  gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog->dialog))),
+                      main_vbox, TRUE, TRUE, 0);
+  gtk_widget_show (main_vbox);
+
+
+  /*  dithering  */
+
+  operation_type = gegl_operation_gtype_from_name ("gegl:color-reduction");
+  dither_pspec = g_object_class_find_property (g_type_class_peek (operation_type),
+                                               "dither-strategy");
+  dither_type = G_TYPE_FROM_CLASS (G_PARAM_SPEC_ENUM (dither_pspec)->enum_class);
+
+  frame = gimp_frame_new (_("Dithering"));
+  gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
+  gtk_container_add (GTK_CONTAINER (frame), vbox);
+  gtk_widget_show (vbox);
+
+  size_group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
+
+  /*  layers  */
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
+  gtk_widget_show (hbox);
+
+  label = gtk_label_new_with_mnemonic (_("_Layers:"));
+  gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
+  gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
+  gtk_size_group_add_widget (size_group, label);
+  gtk_widget_show (label);
+
+  combo = gimp_enum_combo_box_new (dither_type);
+  gtk_label_set_mnemonic_widget (GTK_LABEL (label), combo);
+  gtk_box_pack_start (GTK_BOX (hbox), combo, TRUE, TRUE, 0);
+  gtk_widget_show (combo);
+
+  gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo),
+                              dialog->layer_dither_type,
+                              G_CALLBACK (gimp_int_combo_box_get_active),
+                              &dialog->layer_dither_type);
+
+  /*  layers  */
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
+  gtk_widget_show (hbox);
+
+  label = gtk_label_new_with_mnemonic (_("_Channels and Masks:"));
+  gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
+  gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
+  gtk_size_group_add_widget (size_group, label);
+  gtk_widget_show (label);
+
+  combo = gimp_enum_combo_box_new (dither_type);
+  gtk_label_set_mnemonic_widget (GTK_LABEL (label), combo);
+  gtk_box_pack_start (GTK_BOX (hbox), combo, TRUE, TRUE, 0);
+  gtk_widget_show (combo);
+
+  gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo),
+                              dialog->mask_dither_type,
+                              G_CALLBACK (gimp_int_combo_box_get_active),
+                              &dialog->mask_dither_type);
+
+  g_object_unref (size_group);
+
+  return dialog->dialog;
+}
+
+
+/*  private functions  */
+
+static void
+convert_precision_dialog_response (GtkWidget     *widget,
+                                   gint           response_id,
+                                   ConvertDialog *dialog)
+{
+  if (response_id == GTK_RESPONSE_OK)
+    {
+      GimpProgress *progress;
+
+      progress = gimp_progress_start (dialog->progress,
+                                      _("Converting to lower bit depth"), FALSE);
+
+      gimp_image_convert_precision (dialog->image,
+                                    dialog->precision,
+                                    dialog->layer_dither_type,
+                                    dialog->mask_dither_type,
+                                    progress);
+
+      if (progress)
+        gimp_progress_end (progress);
+
+      gimp_image_flush (dialog->image);
+
+      /* Save defaults for next time */
+      saved_layer_dither_type = dialog->layer_dither_type;
+      saved_mask_dither_type  = dialog->mask_dither_type;
+    }
+
+  gtk_widget_destroy (dialog->dialog);
+}
+
+static void
+convert_precision_dialog_free (ConvertDialog *dialog)
+{
+  g_slice_free (ConvertDialog, dialog);
+}
diff --git a/app/dialogs/convert-precision-dialog.h b/app/dialogs/convert-precision-dialog.h
new file mode 100644
index 0000000..0a25a43
--- /dev/null
+++ b/app/dialogs/convert-precision-dialog.h
@@ -0,0 +1,29 @@
+/* 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 <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __CONVERT_PRECISION_DIALOG_H__
+#define __CONVERT_PRECISION_DIALOG_H__
+
+
+GtkWidget * convert_precision_dialog_new (GimpImage     *image,
+                                          GimpContext   *context,
+                                          GtkWidget     *parent,
+                                          GimpPrecision  precision,
+                                          GimpProgress  *progress);
+
+
+#endif  /*  __CONVERT_PRECISION_DIALOG_H__  */
diff --git a/app/pdb/convert-cmds.c b/app/pdb/convert-cmds.c
index 35ddb4b..93da3cd 100644
--- a/app/pdb/convert-cmds.c
+++ b/app/pdb/convert-cmds.c
@@ -247,7 +247,7 @@ image_convert_precision_invoker (GimpProcedure         *procedure,
       if (gimp_pdb_image_is_not_base_type (image, GIMP_INDEXED, error) &&
           gimp_pdb_image_is_not_precision (image, precision, error))
         {
-          gimp_image_convert_precision (image, precision, NULL);
+          gimp_image_convert_precision (image, precision, 0, 0, NULL);
         }
       else
         {
diff --git a/app/widgets/gimphelp-ids.h b/app/widgets/gimphelp-ids.h
index 332ec35..77d43b4 100644
--- a/app/widgets/gimphelp-ids.h
+++ b/app/widgets/gimphelp-ids.h
@@ -121,6 +121,7 @@
 #define GIMP_HELP_IMAGE_CONVERT_U32               "gimp-image-convert-u32"
 #define GIMP_HELP_IMAGE_CONVERT_HALF              "gimp-image-convert-half"
 #define GIMP_HELP_IMAGE_CONVERT_FLOAT             "gimp-image-convert-float"
+#define GIMP_HELP_IMAGE_CONVERT_PRECISION         "gimp-image-convert-precision"
 #define GIMP_HELP_IMAGE_FLIP_HORIZONTAL           "gimp-image-flip-horizontal"
 #define GIMP_HELP_IMAGE_FLIP_VERTICAL             "gimp-image-flip-vertical"
 #define GIMP_HELP_IMAGE_ROTATE_90                 "gimp-image-rotate-90"
diff --git a/libgimpwidgets/gimpstock.h b/libgimpwidgets/gimpstock.h
index ed26f14..bd854fc 100644
--- a/libgimpwidgets/gimpstock.h
+++ b/libgimpwidgets/gimpstock.h
@@ -285,6 +285,7 @@ G_BEGIN_DECLS
 #define GIMP_STOCK_PALETTE                  GTK_STOCK_SELECT_COLOR
 #define GIMP_STOCK_PATTERN                  GIMP_STOCK_TOOL_BUCKET_FILL
 #define GIMP_STOCK_CONTROLLER_MOUSE         GIMP_STOCK_CURSOR
+#define GIMP_STOCK_CONVERT_PRECISION        GIMP_STOCK_CONVERT_RGB
 
 
 void   gimp_stock_init (void);
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 29cfa64..c0943ab 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -168,6 +168,7 @@ app/core/gimp-user-install.c
 
 app/dialogs/about-dialog.c
 app/dialogs/channel-options-dialog.c
+app/dialogs/convert-precision-dialog.c
 app/dialogs/convert-type-dialog.c
 app/dialogs/data-delete-dialog.c
 app/dialogs/dialogs.c
diff --git a/tools/pdbgen/pdb/convert.pdb b/tools/pdbgen/pdb/convert.pdb
index 690cfea..116a82e 100644
--- a/tools/pdbgen/pdb/convert.pdb
+++ b/tools/pdbgen/pdb/convert.pdb
@@ -246,7 +246,7 @@ HELP
   if (gimp_pdb_image_is_not_base_type (image, GIMP_INDEXED, error) &&
       gimp_pdb_image_is_not_precision (image, precision, error))
     {
-      gimp_image_convert_precision (image, precision, NULL);
+      gimp_image_convert_precision (image, precision, 0, 0, NULL);
     }
   else
     {



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