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core: Use selection when counting colors...

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...in Histogram Editor.
The 2.10 Colorcube Analysis plug-in took into
account the selection when displaying the colors.
The Histogram Editor itself does as well, but our
unique color count did not.
This patch adds a check in gimp_histogram_unique_colors ()
to see if there's an active selection in the image.
If so, we get its area and use that as the bounds in
gegl_buffer_iterator_new () instead of setting it to NULL.
This commit is contained in:
Alx Sa 2026-03-24 13:15:33 +00:00
parent aed086ecfa
commit c3cbd5c21f
1 changed files with 13 additions and 1 deletions
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14
app/core/gimphistogram.c
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@ -37,8 +37,10 @@
#include "gimp-atomic.h"
#include "gimp-parallel.h"
#include "gimpasync.h"
#include "gimpchannel.h"
#include "gimpdrawable.h"
#include "gimphistogram.h"
#include "gimpimage.h"
#include "gimpwaitable.h"
@ -1281,19 +1283,29 @@ gimp_histogram_calculate_async_callback (GimpAsync *async,
guint
gimp_histogram_unique_colors (GimpDrawable *drawable)
{
GimpImage *image;
const Babl *format;
guint bpp;
GeglBufferIterator *iter;
GHashTable *hash_table;
guint uniques = 0;
gboolean selection_empty;
GeglRectangle area;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), 0);
image = gimp_item_get_image (GIMP_ITEM (drawable));
format = gimp_drawable_get_format (drawable);
bpp = babl_format_get_bytes_per_pixel (format);
selection_empty = gimp_channel_is_empty (gimp_image_get_mask (image));
if (! selection_empty)
gimp_item_mask_intersect (GIMP_ITEM (drawable), &area.x, &area.y,
&area.width, &area.height);
iter = gegl_buffer_iterator_new (gimp_drawable_get_buffer (drawable),
NULL, 0, format,
selection_empty ? NULL : &area,
0, format,
GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 1);