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Issue #1621 - Alpha incorrectly exported in PSD

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In file-psd, fix the creation of the "merged" image data, saved in
PSD files along with the actual layer data.
This commit is contained in:
Ell 2018-06-11 21:00:00 -04:00
parent d5fb349e1b
commit 8a01866af0
1 changed files with 22 additions and 31 deletions
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53
plug-ins/file-psd/psd-save.c
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@ -1455,50 +1455,42 @@ create_merged_image (gint32 image_id)
projection = gimp_layer_new_from_visible (image_id, image_id, "psd-save");
if (! gimp_drawable_has_alpha (projection))
return projection;
if (gimp_image_base_type (image_id) != GIMP_INDEXED)
{
GeglBuffer *buffer = gimp_drawable_get_buffer (projection);
const Babl *format = get_pixel_format (projection);
gboolean transparency_found = FALSE;
gint bpp = babl_format_get_bytes_per_pixel (format);
gint n_components = babl_format_get_n_components (format);
gint width = gegl_buffer_get_width (buffer);
gint height = gegl_buffer_get_height (buffer);
GeglBufferIterator *iter = gegl_buffer_iterator_new (buffer, GEGL_RECTANGLE (0, 0, width, height),
0, format,
GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
GeglBuffer *buffer = gimp_drawable_get_buffer (projection);
const Babl *format = get_pixel_format (projection);
gboolean transparency_found = FALSE;
gint bpp = babl_format_get_bytes_per_pixel (format);
GeglBufferIterator *iter;
iter = gegl_buffer_iterator_new (buffer, NULL, 0, format,
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (iter))
{
guchar *data = iter->data[0];
gint y;
guchar *d = iter->data[0];
gint i;
for (y = 0; y < iter->roi->height; y++)
for (i = 0; i < iter->length; i++)
{
guchar *d = data;
gint x;
gint32 alpha = d[bpp - 1];
for (x = 0; x < iter->roi->width; x++)
if (alpha < 255)
{
gint32 alpha = d[bpp - 1];
gint c;
if (alpha < 255)
{
gint i;
transparency_found = TRUE;
/* blend against white, photoshop does this. */
for (i = 0; i < bpp - 1; i++)
d[i] = ((guint32) d[i] * alpha) / 255 + 255 - alpha;
}
transparency_found = TRUE;
/* blend against white, photoshop does this. */
for (c = 0; c < bpp - 1; c++)
d[c] = ((guint32) d[c] * alpha + 128) / 255 + 255 - alpha;
}
d += bpp;
}
data += n_components;
}
g_object_unref (buffer);
@ -1508,8 +1500,7 @@ create_merged_image (gint32 image_id)
}
else
{
if (gimp_drawable_has_alpha (projection))
gimp_layer_flatten (projection); /* PSDs don't support transparency information in indexed images*/
gimp_layer_flatten (projection); /* PSDs don't support transparency information in indexed images*/
}
return projection;