add PIL_mode_from_vips () and vips_from_PIL_mode () utility functions

This commit is contained in:
John Cupitt 2008-06-03 14:08:16 +00:00
parent 6e2afe75c7
commit 48a5e364e2
2 changed files with 127 additions and 85 deletions

View File

@ -21,6 +21,7 @@
- revise i18n configure, get rid of intltool
- command-line IMAGVEC input could segv with non-vips image output
- added .tobuffer()/.frombuffer(), .tostring()/.fromstring() to Python binding
- add PIL_mode_from_vips () and vips_from_PIL_mode () utility functions
25/1/08 started 7.14.0
- bump all version numbers for new stable

View File

@ -6,6 +6,8 @@
* 3/8/08
* - add .tobuffer() / .frombuffer (), .tostring (), .fromstring ()
* methods
* - add PIL_mode_from_vips () and vips_from_PIL_mode () utility
* functions
*/
%module VImage
@ -142,6 +144,46 @@ public:
}
}
%pythoncode %{
# try to guess a PIL mode string from a VIPS image
def PIL_mode_from_vips (vim):
if vim.Bands () == 3 and vim.BandFmt () == VImage.FMTUCHAR:
return 'RGB'
elif vim.Bands () == 4 and vim.BandFmt () == VImage.FMTUCHAR and vim.Type == VImage.VImage.RGB:
return 'RGBA'
elif vim.Bands () == 4 and vim.BandFmt () == VImage.FMTUCHAR and vim.Type == VImage.CMYK:
return 'CMYK'
elif vim.Bands () == 1 and vim.BandFmt () == VImage.FMTUCHAR:
return 'L'
elif vim.Bands () == 1 and vim.BandFmt () == VImage.FMTINT:
return 'I'
elif vim.Bands () == 1 and vim.BandFmt () == VImage.FMTFLOAT:
return 'F'
elif vim.Bands () == 2 and vim.BandFmt () == VImage.FMTUCHAR:
return 'LA'
else:
raise ValueError ('unsupported vips -> pil image')
# return vips (bands, format, type) for a PIL mode
def vips_from_PIL_mode (mode):
if mode == 'RGB':
return (3, VImage.FMTUCHAR, VImage.RGB)
elif mode == 'RGBA':
return (4, VImage.FMTUCHAR, VImage.RGB)
elif mode == 'CMYK':
return (4, VImage.FMTUCHAR, VImage.CMYK)
elif mode == 'L':
return (1, VImage.FMTUCHAR, VImage.B_W)
elif mode == 'I':
return (1, VImage.FMTINT, VImage.B_W)
elif mode == 'F':
return (1, VImage.FMTFLOAT, VImage.B_W)
elif mode == 'LA':
return (2, VImage.FMTUCHAR, VImage.B_W)
else:
raise ValueError ('unsupported pil -> vips image')
%}
/* Helper code for vips_init().
*/
%{
@ -152,42 +194,42 @@ public:
/* Command-line args during parse.
*/
typedef struct _Args {
/* The n strings we alloc when we get from Python.
*/
int n;
char **str;
/* The n strings we alloc when we get from Python.
*/
int n;
char **str;
/* argc/argv as processed by us.
*/
int argc;
char **argv;
/* argc/argv as processed by us.
*/
int argc;
char **argv;
} Args;
#ifdef DEBUG
static void
args_print (Args *args)
{
int i;
int i;
printf ("args_print: argc = %d\n", args->argc);
// +1 so we print the trailing NULL too
for (i = 0; i < args->argc + 1; i++)
printf ("\t%2d)\t%s\n", i, args->argv[i]);
printf ("args_print: argc = %d\n", args->argc);
// +1 so we print the trailing NULL too
for (i = 0; i < args->argc + 1; i++)
printf ("\t%2d)\t%s\n", i, args->argv[i]);
}
#endif /*DEBUG*/
static void
args_free (Args *args)
{
int i;
int i;
for (i = 0; i < args->n; i++)
IM_FREE (args->str[i]);
args->n = 0;
args->argc = 0;
IM_FREE (args->str);
IM_FREE (args->argv);
IM_FREE (args);
for (i = 0; i < args->n; i++)
IM_FREE (args->str[i]);
args->n = 0;
args->argc = 0;
IM_FREE (args->str);
IM_FREE (args->argv);
IM_FREE (args);
}
/* Get argv/argc from python.
@ -195,100 +237,99 @@ args_free (Args *args)
static Args *
args_new (void)
{
Args *args;
PyObject *av;
int i;
int n;
Args *args;
PyObject *av;
int i;
int n;
args = g_new (Args, 1);
args->n = 0;
args->str = NULL;
args->argc = 0;
args->argv = NULL;
args = g_new (Args, 1);
args->n = 0;
args->str = NULL;
args->argc = 0;
args->argv = NULL;
if (!(av = PySys_GetObject ((char *) "argv")))
return (args);
if (!PyList_Check (av)) {
PyErr_Warn (PyExc_Warning, "ignoring sys.argv: "
"it must be a list of strings");
return (args);
}
if (!(av = PySys_GetObject ((char *) "argv")))
return (args);
if (!PyList_Check (av)) {
PyErr_Warn (PyExc_Warning, "ignoring sys.argv: "
"it must be a list of strings");
return args;
}
n = PyList_Size (av);
args->str = g_new (char *, n);
for (i = 0; i < n; i++)
args->str[i] = g_strdup
(PyString_AsString (PyList_GetItem (av, i)));
args->n = n;
n = PyList_Size (av);
args->str = g_new (char *, n);
for (i = 0; i < n; i++)
args->str[i] = g_strdup (PyString_AsString (PyList_GetItem (av, i)));
args->n = n;
/* +1 for NULL termination.
*/
args->argc = n;
args->argv = g_new (char *, n + 1);
for (i = 0; i < n; i++)
args->argv[i] = args->str[i];
args->argv[i] = NULL;
/* +1 for NULL termination.
*/
args->argc = n;
args->argv = g_new (char *, n + 1);
for (i = 0; i < n; i++)
args->argv[i] = args->str[i];
args->argv[i] = NULL;
return (args);
return args;
}
static void
vips_fatal (const char *msg)
{
char buf[256];
char buf[256];
im_snprintf (buf, 256, "%s\n%s", msg, im_error_buffer());
im_error_clear ();
Py_FatalError (buf);
im_snprintf (buf, 256, "%s\n%s", msg, im_error_buffer());
im_error_clear ();
Py_FatalError (buf);
}
%}
%init %{
{
Args *args;
Args *args;
args = args_new ();
args = args_new ();
#ifdef DEBUG
printf ("on startup:\n");
args_print (args);
printf ("on startup:\n");
args_print (args);
#endif /*DEBUG*/
if (im_init_world (args->argv[0])) {
args_free (args);
vips_fatal ("can't initialise module vips");
}
if (im_init_world (args->argv[0])) {
args_free (args);
vips_fatal ("can't initialise module vips");
}
/* Now parse any GOptions.
*/
GError *error = NULL;
GOptionContext *context;
/* Now parse any GOptions.
*/
GError *error = NULL;
GOptionContext *context;
context = g_option_context_new ("- vips");
g_option_context_add_group (context, im_get_option_group());
context = g_option_context_new ("- vips");
g_option_context_add_group (context, im_get_option_group());
g_option_context_set_ignore_unknown_options (context, TRUE);
if( !g_option_context_parse (context,
&args->argc, &args->argv, &error)) {
g_option_context_free (context);
args_free (args);
im_error ("vipsmodule", "%s", error->message);
g_error_free (error);
vips_fatal ("can't initialise module vips");
}
g_option_context_free (context);
g_option_context_set_ignore_unknown_options (context, TRUE);
if (!g_option_context_parse (context,
&args->argc, &args->argv, &error)) {
g_option_context_free (context);
args_free (args);
im_error ("vipsmodule", "%s", error->message);
g_error_free (error);
vips_fatal ("can't initialise module vips");
}
g_option_context_free (context);
#ifdef DEBUG
printf ("after parse:\n");
args_print (args);
printf ("after parse:\n");
args_print (args);
#endif /*DEBUG*/
// Write (possibly) modified argc/argv back again.
if (args->argv)
PySys_SetArgv (args->argc, args->argv);
// Write (possibly) modified argc/argv back again.
if (args->argv)
PySys_SetArgv (args->argc, args->argv);
args_free (args);
args_free (args);
}
%}