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plug-ins: Load PSP selection block 

Adds code to read in PSP_SELECTION_BLOCK.
If there was an active selection in the PSP file when it was
saved, that selection will now be active in GIMP as well on load.
This commit is contained in:
Alx Sa 2023-10-07 13:25:08 +00:00
parent 2de5d5d3e0
commit 968cf06a1c
1 changed files with 64 additions and 1 deletions
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65
plug-ins/common/file-psp.c
View File

@ -2361,6 +2361,66 @@ compression_name (gint compression)
return NULL;
}
static gint
read_selection_block (FILE *f,
GimpImage *image,
guint total_len,
PSPimage *ia,
GError **error)
{
gsize current_location;
gsize file_size;
guint32 chunk_size;
guint32 rect[4];
current_location = ftell (f);
fseek (f, 0, SEEK_END);
file_size = ftell (f);
fseek (f, current_location, SEEK_SET);
if (fread (&chunk_size, 4, 1, f) < 1)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Error reading selection chunk"));
return -1;
}
chunk_size = GUINT32_FROM_LE (chunk_size);
current_location = ftell (f);
if (chunk_size > (file_size - current_location))
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Invalid selection chunk size"));
return -1;
}
if (fread (&rect, 16, 1, f) < 1)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Error reading selection chunk"));
return -1;
}
swab_rect (rect);
gimp_image_select_rectangle (image, GIMP_CHANNEL_OP_ADD,
rect[0], rect[1],
rect[2] - rect[0],
rect[3] - rect[1]);
/* The file format specifies multiple selections, but
* as of PSP 8 they only allow one. Skipping the remaining
* information in the block. */
total_len -= sizeof (guint32) + sizeof (rect);
if (try_fseek (f, total_len, SEEK_SET, error) < 0)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Error reading end of selection chunk"));
return -1;
}
return 0;
}
static gint
read_colorprofile_block (FILE *f,
GimpImage *image,
@ -2552,7 +2612,10 @@ load_image (GFile *file,
break;
case PSP_SELECTION_BLOCK:
break; /* Not yet implemented */
if (read_selection_block (f, image, block_total_len, &ia,
error) == -1)
goto error;
break;
case PSP_ALPHA_BANK_BLOCK:
break; /* Not yet implemented */