Adding upstream version 2.10.36.upstream/2.10.36

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 574 insertions, 0 deletions

diff --git a/app/core/gimppalette-import.c b/app/core/gimppalette-import.c
new file mode 100644
index 0000000..44a91e5
--- /dev/null
+++ b/app/core/gimppalette-import.c
@@ -0,0 +1,574 @@
+/* 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 <cairo.h>
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpcolor/gimpcolor.h"
+
+#include "core-types.h"
+
+#include "gimpchannel.h"
+#include "gimpcontainer.h"
+#include "gimpcontext.h"
+#include "gimpgradient.h"
+#include "gimpimage.h"
+#include "gimpimage-colormap.h"
+#include "gimppalette.h"
+#include "gimppalette-import.h"
+#include "gimppalette-load.h"
+#include "gimppickable.h"
+
+#include "gimp-intl.h"
+
+
+#define MAX_IMAGE_COLORS (10000 * 2)
+
+
+/*  create a palette from a gradient  ****************************************/
+
+GimpPalette *
+gimp_palette_import_from_gradient (GimpGradient                *gradient,
+                                   GimpContext                 *context,
+                                   gboolean                     reverse,
+                                   GimpGradientBlendColorSpace  blend_color_space,
+                                   const gchar                 *palette_name,
+                                   gint                         n_colors)
+{
+  GimpPalette         *palette;
+  GimpGradientSegment *seg = NULL;
+  gdouble              dx, cur_x;
+  GimpRGB              color;
+  gint                 i;
+
+  g_return_val_if_fail (GIMP_IS_GRADIENT (gradient), NULL);
+  g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
+  g_return_val_if_fail (palette_name != NULL, NULL);
+  g_return_val_if_fail (n_colors > 1, NULL);
+
+  palette = GIMP_PALETTE (gimp_palette_new (context, palette_name));
+
+  dx = 1.0 / (n_colors - 1);
+
+  for (i = 0, cur_x = 0; i < n_colors; i++, cur_x += dx)
+    {
+      seg = gimp_gradient_get_color_at (gradient, context,
+                                        seg, cur_x, reverse, blend_color_space,
+                                        &color);
+      gimp_palette_add_entry (palette, -1, NULL, &color);
+    }
+
+  return palette;
+}
+
+
+/*  create a palette from a non-indexed image  *******************************/
+
+typedef struct _ImgColors ImgColors;
+
+struct _ImgColors
+{
+  guint  count;
+  guint  r_adj;
+  guint  g_adj;
+  guint  b_adj;
+  guchar r;
+  guchar g;
+  guchar b;
+};
+
+static gint count_color_entries = 0;
+
+static GHashTable *
+gimp_palette_import_store_colors (GHashTable *table,
+                                  guchar     *colors,
+                                  guchar     *colors_real,
+                                  gint        n_colors)
+{
+  gpointer   found_color = NULL;
+  ImgColors *new_color;
+  guint      key_colors = colors[0] * 256 * 256 + colors[1] * 256 + colors[2];
+
+  if (table == NULL)
+    {
+      table = g_hash_table_new (g_direct_hash, g_direct_equal);
+      count_color_entries = 0;
+    }
+  else
+    {
+      found_color = g_hash_table_lookup (table, GUINT_TO_POINTER (key_colors));
+    }
+
+  if (found_color == NULL)
+    {
+      if (count_color_entries > MAX_IMAGE_COLORS)
+        {
+          /* Don't add any more new ones */
+          return table;
+        }
+
+      count_color_entries++;
+
+      new_color = g_slice_new (ImgColors);
+
+      new_color->count = 1;
+      new_color->r_adj = 0;
+      new_color->g_adj = 0;
+      new_color->b_adj = 0;
+      new_color->r     = colors[0];
+      new_color->g     = colors[1];
+      new_color->b     = colors[2];
+
+      g_hash_table_insert (table, GUINT_TO_POINTER (key_colors), new_color);
+    }
+  else
+    {
+      new_color = found_color;
+
+      if (new_color->count < (G_MAXINT - 1))
+        new_color->count++;
+
+      /* Now do the adjustments ...*/
+      new_color->r_adj += (colors_real[0] - colors[0]);
+      new_color->g_adj += (colors_real[1] - colors[1]);
+      new_color->b_adj += (colors_real[2] - colors[2]);
+
+      /* Boundary conditions */
+      if(new_color->r_adj > (G_MAXINT - 255))
+        new_color->r_adj /= new_color->count;
+
+      if(new_color->g_adj > (G_MAXINT - 255))
+        new_color->g_adj /= new_color->count;
+
+      if(new_color->b_adj > (G_MAXINT - 255))
+        new_color->b_adj /= new_color->count;
+    }
+
+  return table;
+}
+
+static void
+gimp_palette_import_create_list (gpointer key,
+                                 gpointer value,
+                                 gpointer user_data)
+{
+  GSList    **list      = user_data;
+  ImgColors  *color_tab = value;
+
+  *list = g_slist_prepend (*list, color_tab);
+}
+
+static gint
+gimp_palette_import_sort_colors (gconstpointer a,
+                                 gconstpointer b)
+{
+  const ImgColors *s1 = a;
+  const ImgColors *s2 = b;
+
+  if(s1->count > s2->count)
+    return -1;
+  if(s1->count < s2->count)
+    return 1;
+
+  return 0;
+}
+
+static void
+gimp_palette_import_create_image_palette (gpointer data,
+                                          gpointer user_data)
+{
+  GimpPalette *palette   = user_data;
+  ImgColors   *color_tab = data;
+  gint         n_colors;
+  gchar       *lab;
+  GimpRGB      color;
+
+  n_colors = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (palette),
+                                                 "import-n-colors"));
+
+  if (gimp_palette_get_n_colors (palette) >= n_colors)
+    return;
+
+  /* TRANSLATORS: the "%s" is an item title and "%u" is the number of
+     occurrences for this item. */
+  lab = g_strdup_printf (_("%s (occurs %u)"),
+                         _("Untitled"),
+                         color_tab->count);
+
+  /* Adjust the colors to the mean of the the sample */
+  gimp_rgba_set_uchar
+    (&color,
+     (guchar) color_tab->r + (color_tab->r_adj / color_tab->count),
+     (guchar) color_tab->g + (color_tab->g_adj / color_tab->count),
+     (guchar) color_tab->b + (color_tab->b_adj / color_tab->count),
+     255);
+
+  gimp_palette_add_entry (palette, -1, lab, &color);
+
+  g_free (lab);
+}
+
+static GimpPalette *
+gimp_palette_import_make_palette (GHashTable  *table,
+                                  const gchar *palette_name,
+                                  GimpContext *context,
+                                  gint         n_colors)
+{
+  GimpPalette *palette;
+  GSList      *list = NULL;
+  GSList      *iter;
+
+  palette = GIMP_PALETTE (gimp_palette_new (context, palette_name));
+
+  if (! table)
+    return palette;
+
+  g_hash_table_foreach (table, gimp_palette_import_create_list, &list);
+  list = g_slist_sort (list, gimp_palette_import_sort_colors);
+
+  g_object_set_data (G_OBJECT (palette), "import-n-colors",
+                     GINT_TO_POINTER (n_colors));
+
+  g_slist_foreach (list, gimp_palette_import_create_image_palette, palette);
+
+  g_object_set_data (G_OBJECT (palette), "import-n-colors", NULL);
+
+  /*  Free up used memory
+   *  Note the same structure is on both the hash list and the sorted
+   *  list. So only delete it once.
+   */
+  g_hash_table_destroy (table);
+
+  for (iter = list; iter; iter = iter->next)
+    g_slice_free (ImgColors, iter->data);
+
+  g_slist_free (list);
+
+  return palette;
+}
+
+static GHashTable *
+gimp_palette_import_extract (GimpImage     *image,
+                             GimpPickable  *pickable,
+                             gint           pickable_off_x,
+                             gint           pickable_off_y,
+                             gboolean       selection_only,
+                             gint           x,
+                             gint           y,
+                             gint           width,
+                             gint           height,
+                             gint           n_colors,
+                             gint           threshold)
+{
+  GeglBuffer         *buffer;
+  GeglBufferIterator *iter;
+  GeglRectangle      *mask_roi = NULL;
+  GeglRectangle       rect     = { x, y, width, height };
+  GHashTable         *colors   = NULL;
+  const Babl         *format;
+  gint                bpp;
+  gint                mask_bpp = 0;
+
+  buffer = gimp_pickable_get_buffer (pickable);
+  format = babl_format ("R'G'B'A u8");
+
+  iter = gegl_buffer_iterator_new (buffer, &rect, 0, format,
+                                   GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 2);
+  bpp = babl_format_get_bytes_per_pixel (format);
+
+  if (selection_only &&
+      ! gimp_channel_is_empty (gimp_image_get_mask (image)))
+    {
+      GimpDrawable *mask = GIMP_DRAWABLE (gimp_image_get_mask (image));
+
+      rect.x = x + pickable_off_x;
+      rect.y = y + pickable_off_y;
+
+      buffer = gimp_drawable_get_buffer (mask);
+      format = babl_format ("Y u8");
+
+      gegl_buffer_iterator_add (iter, buffer, &rect, 0, format,
+                                GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
+      mask_roi = &iter->items[1].roi;
+      mask_bpp = babl_format_get_bytes_per_pixel (format);
+    }
+
+  while (gegl_buffer_iterator_next (iter))
+    {
+      const guchar *data      = iter->items[0].data;
+      const guchar *mask_data = NULL;
+      gint          length    = iter->length;
+
+      if (mask_roi)
+        mask_data = iter->items[1].data;
+
+      while (length--)
+        {
+          /*  ignore unselected, and completely transparent pixels  */
+          if ((! mask_data || *mask_data) && data[ALPHA])
+            {
+              guchar rgba[MAX_CHANNELS]     = { 0, };
+              guchar rgb_real[MAX_CHANNELS] = { 0, };
+
+              memcpy (rgba, data, 4);
+              memcpy (rgb_real, rgba, 4);
+
+              rgba[0] = (rgba[0] / threshold) * threshold;
+              rgba[1] = (rgba[1] / threshold) * threshold;
+              rgba[2] = (rgba[2] / threshold) * threshold;
+
+              colors = gimp_palette_import_store_colors (colors,
+                                                         rgba, rgb_real,
+                                                         n_colors);
+            }
+
+          data += bpp;
+
+          if (mask_data)
+            mask_data += mask_bpp;
+        }
+    }
+
+  return colors;
+}
+
+GimpPalette *
+gimp_palette_import_from_image (GimpImage   *image,
+                                GimpContext *context,
+                                const gchar *palette_name,
+                                gint         n_colors,
+                                gint         threshold,
+                                gboolean     selection_only)
+{
+  GHashTable *colors;
+  gint        x, y;
+  gint        width, height;
+
+  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 (palette_name != NULL, NULL);
+  g_return_val_if_fail (n_colors > 1, NULL);
+  g_return_val_if_fail (threshold > 0, NULL);
+
+  gimp_pickable_flush (GIMP_PICKABLE (image));
+
+  if (selection_only)
+    {
+      gimp_item_bounds (GIMP_ITEM (gimp_image_get_mask (image)),
+                        &x, &y, &width, &height);
+    }
+  else
+    {
+      x      = 0;
+      y      = 0;
+      width  = gimp_image_get_width  (image);
+      height = gimp_image_get_height (image);
+    }
+
+  colors = gimp_palette_import_extract (image,
+                                        GIMP_PICKABLE (image),
+                                        0, 0,
+                                        selection_only,
+                                        x, y, width, height,
+                                        n_colors, threshold);
+
+  return gimp_palette_import_make_palette (colors, palette_name, context,
+                                           n_colors);
+}
+
+
+/*  create a palette from an indexed image  **********************************/
+
+GimpPalette *
+gimp_palette_import_from_indexed_image (GimpImage   *image,
+                                        GimpContext *context,
+                                        const gchar *palette_name)
+{
+  GimpPalette  *palette;
+  const guchar *colormap;
+  guint         n_colors;
+  gint          count;
+  GimpRGB       color;
+
+  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 (gimp_image_get_base_type (image) == GIMP_INDEXED, NULL);
+  g_return_val_if_fail (palette_name != NULL, NULL);
+
+  palette = GIMP_PALETTE (gimp_palette_new (context, palette_name));
+
+  colormap = gimp_image_get_colormap (image);
+  n_colors = gimp_image_get_colormap_size (image);
+
+  for (count = 0; count < n_colors; ++count)
+    {
+      gchar name[256];
+
+      g_snprintf (name, sizeof (name), _("Index %d"), count);
+
+      gimp_rgba_set_uchar (&color,
+                           colormap[count * 3 + 0],
+                           colormap[count * 3 + 1],
+                           colormap[count * 3 + 2],
+                           255);
+
+      gimp_palette_add_entry (palette, -1, name, &color);
+    }
+
+  return palette;
+}
+
+
+/*  create a palette from a drawable  ****************************************/
+
+GimpPalette *
+gimp_palette_import_from_drawable (GimpDrawable *drawable,
+                                   GimpContext  *context,
+                                   const gchar  *palette_name,
+                                   gint          n_colors,
+                                   gint          threshold,
+                                   gboolean      selection_only)
+{
+  GHashTable *colors = NULL;
+  gint        x, y;
+  gint        width, height;
+  gint        off_x, off_y;
+
+  g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
+  g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
+  g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), NULL);
+  g_return_val_if_fail (palette_name != NULL, NULL);
+  g_return_val_if_fail (n_colors > 1, NULL);
+  g_return_val_if_fail (threshold > 0, NULL);
+
+  if (selection_only)
+    {
+      if (! gimp_item_mask_intersect (GIMP_ITEM (drawable),
+                                      &x, &y, &width, &height))
+        return NULL;
+    }
+  else
+    {
+      x      = 0;
+      y      = 0;
+      width  = gimp_item_get_width  (GIMP_ITEM (drawable));
+      height = gimp_item_get_height (GIMP_ITEM (drawable));
+    }
+
+  gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);
+
+  colors =
+    gimp_palette_import_extract (gimp_item_get_image (GIMP_ITEM (drawable)),
+                                 GIMP_PICKABLE (drawable),
+                                 off_x, off_y,
+                                 selection_only,
+                                 x, y, width, height,
+                                 n_colors, threshold);
+
+  return gimp_palette_import_make_palette (colors, palette_name, context,
+                                           n_colors);
+}
+
+
+/*  create a palette from a file  **********************************/
+
+GimpPalette *
+gimp_palette_import_from_file (GimpContext  *context,
+                               GFile        *file,
+                               const gchar  *palette_name,
+                               GError      **error)
+{
+  GList        *palette_list = NULL;
+  GInputStream *input;
+  GError       *my_error = NULL;
+
+  g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
+  g_return_val_if_fail (G_IS_FILE (file), NULL);
+  g_return_val_if_fail (palette_name != NULL, NULL);
+  g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
+  input = G_INPUT_STREAM (g_file_read (file, NULL, &my_error));
+  if (! input)
+    {
+      g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_OPEN,
+                   _("Could not open '%s' for reading: %s"),
+                   gimp_file_get_utf8_name (file), my_error->message);
+      g_clear_error (&my_error);
+      return NULL;
+    }
+
+  switch (gimp_palette_load_detect_format (file, input))
+    {
+    case GIMP_PALETTE_FILE_FORMAT_GPL:
+      palette_list = gimp_palette_load (context, file, input, error);
+      break;
+
+    case GIMP_PALETTE_FILE_FORMAT_ACT:
+      palette_list = gimp_palette_load_act (context, file, input, error);
+      break;
+
+    case GIMP_PALETTE_FILE_FORMAT_RIFF_PAL:
+      palette_list = gimp_palette_load_riff (context, file, input, error);
+      break;
+
+    case GIMP_PALETTE_FILE_FORMAT_PSP_PAL:
+      palette_list = gimp_palette_load_psp (context, file, input, error);
+      break;
+
+    case GIMP_PALETTE_FILE_FORMAT_ACO:
+      palette_list = gimp_palette_load_aco (context, file, input, error);
+      break;
+
+    case GIMP_PALETTE_FILE_FORMAT_ACB:
+      palette_list = gimp_palette_load_acb (context, file, input, error);
+      break;
+
+    case GIMP_PALETTE_FILE_FORMAT_ASE:
+      palette_list = gimp_palette_load_ase (context, file, input, error);
+      break;
+
+    case GIMP_PALETTE_FILE_FORMAT_CSS:
+      palette_list = gimp_palette_load_css (context, file, input, error);
+      break;
+
+    default:
+      g_set_error (error,
+                   GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
+                   _("Unknown type of palette file: %s"),
+                   gimp_file_get_utf8_name (file));
+      break;
+    }
+
+  g_object_unref (input);
+
+  if (palette_list)
+    {
+      GimpPalette *palette = g_object_ref (palette_list->data);
+
+      gimp_object_set_name (GIMP_OBJECT (palette), palette_name);
+
+      g_list_free_full (palette_list, (GDestroyNotify) g_object_unref);
+
+      return palette;
+    }
+
+  return NULL;
+}