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-rw-r--r--app/core/gimpimage-convert-precision.c300
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diff --git a/app/core/gimpimage-convert-precision.c b/app/core/gimpimage-convert-precision.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpimage-convert-precision.c
+ * Copyright (C) 2012 Michael Natterer <mitch@gimp.org>
+ *
+ * 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 <cairo.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpcolor/gimpcolor.h"
+
+#include "core-types.h"
+
+#include "gegl/gimp-babl.h"
+#include "gegl/gimp-gegl-loops.h"
+
+#include "gimpchannel.h"
+#include "gimpdrawable.h"
+#include "gimpdrawable-operation.h"
+#include "gimpimage.h"
+#include "gimpimage-color-profile.h"
+#include "gimpimage-convert-precision.h"
+#include "gimpimage-undo.h"
+#include "gimpimage-undo-push.h"
+#include "gimpobjectqueue.h"
+#include "gimpprogress.h"
+
+#include "text/gimptextlayer.h"
+
+#include "gimp-intl.h"
+
+
+void
+gimp_image_convert_precision (GimpImage *image,
+ GimpPrecision precision,
+ GeglDitherMethod layer_dither_type,
+ GeglDitherMethod text_layer_dither_type,
+ GeglDitherMethod mask_dither_type,
+ GimpProgress *progress)
+{
+ GimpColorProfile *old_profile;
+ GimpColorProfile *new_profile = NULL;
+ const Babl *old_format;
+ const Babl *new_format;
+ GimpObjectQueue *queue;
+ GimpProgress *sub_progress;
+ GList *layers;
+ GimpDrawable *drawable;
+ const gchar *undo_desc = NULL;
+
+ g_return_if_fail (GIMP_IS_IMAGE (image));
+ g_return_if_fail (precision != gimp_image_get_precision (image));
+ g_return_if_fail (gimp_babl_is_valid (gimp_image_get_base_type (image),
+ precision));
+ g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));
+
+ switch (precision)
+ {
+ case GIMP_PRECISION_U8_LINEAR:
+ undo_desc = C_("undo-type", "Convert Image to 8 bit linear integer");
+ break;
+ case GIMP_PRECISION_U8_GAMMA:
+ undo_desc = C_("undo-type", "Convert Image to 8 bit gamma integer");
+ break;
+ case GIMP_PRECISION_U16_LINEAR:
+ undo_desc = C_("undo-type", "Convert Image to 16 bit linear integer");
+ break;
+ case GIMP_PRECISION_U16_GAMMA:
+ undo_desc = C_("undo-type", "Convert Image to 16 bit gamma integer");
+ break;
+ case GIMP_PRECISION_U32_LINEAR:
+ undo_desc = C_("undo-type", "Convert Image to 32 bit linear integer");
+ break;
+ case GIMP_PRECISION_U32_GAMMA:
+ undo_desc = C_("undo-type", "Convert Image to 32 bit gamma integer");
+ break;
+ case GIMP_PRECISION_HALF_LINEAR:
+ undo_desc = C_("undo-type", "Convert Image to 16 bit linear floating point");
+ break;
+ case GIMP_PRECISION_HALF_GAMMA:
+ undo_desc = C_("undo-type", "Convert Image to 16 bit gamma floating point");
+ break;
+ case GIMP_PRECISION_FLOAT_LINEAR:
+ undo_desc = C_("undo-type", "Convert Image to 32 bit linear floating point");
+ break;
+ case GIMP_PRECISION_FLOAT_GAMMA:
+ undo_desc = C_("undo-type", "Convert Image to 32 bit gamma floating point");
+ break;
+ case GIMP_PRECISION_DOUBLE_LINEAR:
+ undo_desc = C_("undo-type", "Convert Image to 64 bit linear floating point");
+ break;
+ case GIMP_PRECISION_DOUBLE_GAMMA:
+ undo_desc = C_("undo-type", "Convert Image to 64 bit gamma floating point");
+ break;
+ }
+
+ if (progress)
+ gimp_progress_start (progress, FALSE, "%s", undo_desc);
+
+ queue = gimp_object_queue_new (progress);
+ sub_progress = GIMP_PROGRESS (queue);
+
+ layers = gimp_image_get_layer_list (image);
+ gimp_object_queue_push_list (queue, layers);
+ g_list_free (layers);
+
+ gimp_object_queue_push (queue, gimp_image_get_mask (image));
+ gimp_object_queue_push_container (queue, gimp_image_get_channels (image));
+
+ g_object_freeze_notify (G_OBJECT (image));
+
+ gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_IMAGE_CONVERT,
+ undo_desc);
+
+ /* Push the image precision to the stack */
+ gimp_image_undo_push_image_precision (image, NULL);
+
+ old_profile = gimp_image_get_color_profile (image);
+ old_format = gimp_image_get_layer_format (image, FALSE);
+
+ /* Set the new precision */
+ g_object_set (image, "precision", precision, NULL);
+
+ new_format = gimp_image_get_layer_format (image, FALSE);
+
+ if (old_profile)
+ {
+ if (gimp_babl_format_get_linear (old_format) !=
+ gimp_babl_format_get_linear (new_format))
+ {
+ /* when converting between linear and gamma, we create a new
+ * profile using the original profile's chromacities and
+ * whitepoint, but a linear/sRGB-gamma TRC.
+ */
+
+ if (gimp_babl_format_get_linear (new_format))
+ {
+ new_profile =
+ gimp_color_profile_new_linear_from_color_profile (old_profile);
+ }
+ else
+ {
+ new_profile =
+ gimp_color_profile_new_srgb_trc_from_color_profile (old_profile);
+ }
+
+ /* if a new profile cannot be be generated, convert to the
+ * builtin profile, which is better than leaving the user with
+ * broken colors
+ */
+ if (! new_profile)
+ {
+ new_profile = gimp_image_get_builtin_color_profile (image);
+ g_object_ref (new_profile);
+ }
+ }
+
+ if (! new_profile)
+ new_profile = g_object_ref (old_profile);
+ }
+
+ while ((drawable = gimp_object_queue_pop (queue)))
+ {
+ if (drawable == GIMP_DRAWABLE (gimp_image_get_mask (image)))
+ {
+ GeglBuffer *buffer;
+
+ gimp_image_undo_push_mask_precision (image, NULL,
+ GIMP_CHANNEL (drawable));
+
+ buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
+ gimp_image_get_width (image),
+ gimp_image_get_height (image)),
+ gimp_image_get_mask_format (image));
+
+ gimp_gegl_buffer_copy (gimp_drawable_get_buffer (drawable), NULL,
+ GEGL_ABYSS_NONE,
+ buffer, NULL);
+
+ gimp_drawable_set_buffer (drawable, FALSE, NULL, buffer);
+ g_object_unref (buffer);
+
+ gimp_progress_set_value (sub_progress, 1.0);
+ }
+ else
+ {
+ gint dither_type;
+
+ if (gimp_item_is_text_layer (GIMP_ITEM (drawable)))
+ dither_type = text_layer_dither_type;
+ else
+ dither_type = layer_dither_type;
+
+ gimp_drawable_convert_type (drawable, image,
+ gimp_drawable_get_base_type (drawable),
+ precision,
+ gimp_drawable_has_alpha (drawable),
+ new_profile,
+ dither_type,
+ mask_dither_type,
+ TRUE, sub_progress);
+ }
+ }
+
+ if (new_profile)
+ {
+ if (new_profile != old_profile)
+ gimp_image_set_color_profile (image, new_profile, NULL);
+
+ g_object_unref (new_profile);
+ }
+
+ gimp_image_undo_group_end (image);
+
+ gimp_image_precision_changed (image);
+ g_object_thaw_notify (G_OBJECT (image));
+
+ g_object_unref (queue);
+
+ if (progress)
+ gimp_progress_end (progress);
+}
+
+void
+gimp_image_convert_dither_u8 (GimpImage *image,
+ GimpProgress *progress)
+{
+ GeglNode *dither;
+
+ g_return_if_fail (GIMP_IS_IMAGE (image));
+ g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));
+
+ dither = gegl_node_new_child (NULL,
+ "operation", "gegl:noise-rgb",
+ "red", 1.0 / 256.0,
+ "green", 1.0 / 256.0,
+ "blue", 1.0 / 256.0,
+ "linear", FALSE,
+ "gaussian", FALSE,
+ NULL);
+
+ if (dither)
+ {
+ GimpObjectQueue *queue;
+ GimpProgress *sub_progress;
+ GList *layers;
+ GList *list;
+ GimpDrawable *drawable;
+
+ if (progress)
+ gimp_progress_start (progress, FALSE, "%s", _("Dithering"));
+
+ queue = gimp_object_queue_new (progress);
+ sub_progress = GIMP_PROGRESS (queue);
+
+ layers = gimp_image_get_layer_list (image);
+
+ for (list = layers; list; list = g_list_next (list))
+ {
+ if (! gimp_viewable_get_children (list->data) &&
+ ! gimp_item_is_text_layer (list->data))
+ {
+ gimp_object_queue_push (queue, list->data);
+ }
+ }
+
+ g_list_free (layers);
+
+ while ((drawable = gimp_object_queue_pop (queue)))
+ {
+ gimp_drawable_apply_operation (drawable, sub_progress,
+ _("Dithering"),
+ dither);
+ }
+
+ g_object_unref (queue);
+
+ if (progress)
+ gimp_progress_end (progress);
+
+ g_object_unref (dither);
+ }
+}
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