void
gimp_pickable_pixel_to_srgb (GimpPickable *pickable,
const Babl *format,
gpointer pixel,
GimpRGB *color)
{
GimpPickableInterface *pickable_iface;
g_return_if_fail (GIMP_IS_PICKABLE (pickable));
g_return_if_fail (pixel != NULL);
g_return_if_fail (color != NULL);
if (! format)
format = gimp_pickable_get_format (pickable);
pickable_iface = GIMP_PICKABLE_GET_INTERFACE (pickable);
if (pickable_iface->pixel_to_srgb)
{
pickable_iface->pixel_to_srgb (pickable, format, pixel, color);
}
else
{
gimp_rgba_set_pixel (color, format, pixel);
}
}
static void
transfer_registration_color (GeglBuffer *src,
GeglBuffer **dst,
gint count)
{
GimpRGB color, test;
GeglBufferIterator *gi;
const Babl *src_format, *dst_format;
gint i, src_bpp, dst_bpp;
gdouble white;
gimp_context_get_foreground (&color);
white = 1.0;
src_format = gegl_buffer_get_format (src);
src_bpp = babl_format_get_bytes_per_pixel (src_format);
dst_format = gegl_buffer_get_format (dst[0]);
dst_bpp = babl_format_get_bytes_per_pixel (dst_format);
gi = gegl_buffer_iterator_new (src, NULL, 0, NULL,
GEGL_BUFFER_READ, GEGL_ABYSS_NONE);
for (i = 0; i < count; i++)
{
gegl_buffer_iterator_add (gi, dst[i], NULL, 0, NULL,
GEGL_BUFFER_READWRITE, GEGL_ABYSS_NONE);
}
while (gegl_buffer_iterator_next (gi))
{
guint j, k;
gpointer src_data, dst_data[MAX_EXTRACT_IMAGES];
src_data = gi->data[0];
for (j = 0; j < count; j++)
dst_data[j] = gi->data[j+1];
for (k = 0; k < gi->length; k++)
{
gulong pos;
pos = k * src_bpp;
gimp_rgba_set_pixel (&test, src_format, ((guchar *)src_data) + pos);
if (gimp_rgb_distance (&test, &color) < 1e-6)
{
for (j = 0; j < count; j++)
{
gpointer data;
data = dst_data[j];
babl_process (babl_fish (babl_format ("Y double"), dst_format),
&white, (guchar *)data + (k * dst_bpp), 1);
}
}
}
}
}
gboolean
gimp_pickable_get_color_at (GimpPickable *pickable,
gint x,
gint y,
GimpRGB *color)
{
guchar pixel[32];
g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), FALSE);
g_return_val_if_fail (color != NULL, FALSE);
if (! gimp_pickable_get_pixel_at (pickable, x, y, NULL, pixel))
return FALSE;
gimp_rgba_set_pixel (color, gimp_pickable_get_format (pickable), pixel);
return TRUE;
}
gboolean
gimp_pickable_pick_color (GimpPickable *pickable,
gint x,
gint y,
gboolean sample_average,
gdouble average_radius,
GimpRGB *color,
gint *color_index)
{
const Babl *format;
gdouble pixel[4];
g_return_val_if_fail (GIMP_IS_PICKABLE (pickable), FALSE);
format = babl_format ("RGBA double");
if (! gimp_pickable_get_pixel_at (pickable, x, y, format, pixel))
return FALSE;
if (sample_average)
{
gint count = 0;
gdouble color_avg[4] = { 0.0, 0.0, 0.0, 0.0 };
gint radius = (gint) average_radius;
gint i, j;
for (i = x - radius; i <= x + radius; i++)
for (j = y - radius; j <= y + radius; j++)
if (gimp_pickable_get_pixel_at (pickable, i, j, format, pixel))
{
count++;
color_avg[RED] += pixel[RED];
color_avg[GREEN] += pixel[GREEN];
color_avg[BLUE] += pixel[BLUE];
color_avg[ALPHA] += pixel[ALPHA];
}
pixel[RED] = color_avg[RED] / count;
pixel[GREEN] = color_avg[GREEN] / count;
pixel[BLUE] = color_avg[BLUE] / count;
pixel[ALPHA] = color_avg[ALPHA] / count;
}
gimp_rgba_set_pixel (color, format, pixel);
if (color_index)
{
format = gimp_pickable_get_format (pickable);
if (babl_format_is_palette (format) && ! sample_average)
{
guchar indexed_pixel[4];
gimp_pickable_get_pixel_at (pickable, x, y, format, indexed_pixel);
*color_index = indexed_pixel[0];
}
else
{
*color_index = -1;
}
}
return TRUE;
}