Closes #74

docs/source/introduction.rst

@@ -18,9 +18,9 @@ Glymur works on Python 2.6, 2.7, and 3.3.  Python 3.3 is strongly recommended.
 
 OpenJPEG Installation
 =====================
-The OpenJPEG library version must be either 1.5.1 or the trunk/development
+The OpenJPEG library version must be either 1.4, 1.5, or the trunk/development
-version of OpenJPEG.  Version 2.0.0 or versions earlier than 1.5.0
+version of OpenJPEG.  Version 2.0.0 or versions earlier than 1.4.0
-are not supported.  Furthermore, the 1.5.x version of OpenJPEG is
+are not supported.  Furthermore, the 1.4 and 1.5 versions of OpenJPEG are
 currently only utilized for read-only purposes.  For more information
 about OpenJPEG, please consult http://www.openjpeg.org.
 
@@ -56,5 +56,5 @@ You can run the tests from within python as follows::
     >>> glymur.runtests()
 
 Many tests are currently skipped; in fact most of them are skipped if you 
-are relying on OpenJPEG 1.5.1.  But the important thing, though, is whether or
+are relying on OpenJPEG 1.4 or 1.5.  But the important thing, though, is whether or
 not any tests fail.

glymur/lib/config.py

@@ -67,13 +67,6 @@ def load_openjpeg(libopenjpeg_path):
     except OSError:
         openjpeg_lib = None
 
-    if openjpeg_lib is not None:
-        # Must be at least 1.5.0
-        openjpeg_lib.opj_version.restype = ctypes.c_char_p
-        version = openjpeg_lib.opj_version().decode('utf-8')
-        _, minor, _ = version.split('.')
-        if minor != '5':
-            openjpeg_lib = None
     return openjpeg_lib
 
 

glymur/lib/openjpeg.py

@@ -4,6 +4,7 @@
 # pylint: disable=R0903
 
 import ctypes
+import sys
 
 from .config import glymur_config
 _, OPENJPEG = glymur_config()
@@ -11,6 +12,20 @@ _, OPENJPEG = glymur_config()
 PATH_LEN = 4096  # maximum allowed size for filenames
 
 
+def version():
+    """Wrapper for opj_version library routine."""
+    OPENJPEG.opj_version.restype = ctypes.c_char_p
+    library_version = OPENJPEG.opj_version()
+    if sys.hexversion >= 0x03000000:
+        return library_version.decode('utf-8')
+    else:
+        return library_version
+
+# Need to get the minor version, make sure we are at least at 1.4.x
+#import pdb; pdb.set_trace()
+_minor = version().split('.')[1]
+
+
 class EventMgrType(ctypes.Structure):
     """Message handler object.
 
@@ -86,8 +101,10 @@ class DecompressionParametersType(ctypes.Structure):
                 ("jpwl_max_tiles",    ctypes.c_int),
                 # cp_limit_decoding:  whether decoding should be done on the
                 # entire codestream or be limited to the main header
-                ("cp_limit_decoding", ctypes.c_int),
+                ("cp_limit_decoding", ctypes.c_int)]
-                ("flags",             ctypes.c_uint)]
+
+    if _minor != '4':
+        _fields_.append(("flags",             ctypes.c_uint))
 
 
 class ImageCompType(ctypes.Structure):
@@ -204,10 +221,3 @@ def setup_decoder(dinfo, dparams):
                 ctypes.POINTER(DecompressionParametersType)]
     OPENJPEG.opj_setup_decoder.argtypes = argtypes
     OPENJPEG.opj_setup_decoder(dinfo, dparams)
-
-
-def version():
-    """Wrapper for opj_version library routine."""
-    OPENJPEG.opj_version.restype = ctypes.c_char_p
-    library_version = OPENJPEG.opj_version()
-    return library_version.decode('utf-8')

glymur/lib/test/test_openjpeg.py

@@ -1,5 +1,6 @@
 #pylint:  disable-all
 import ctypes
+import re
 import sys
 
 if sys.hexversion < 0x02070000:
@@ -21,13 +22,18 @@ class TestOpenJPEG(unittest.TestCase):
         pass
 
     def test_version(self):
-        v = glymur.lib._openjpeg.version()
+        version = glymur.lib._openjpeg.version()
-        parts = v.split('.')
+        regex = re.compile('1.[45].[0-9]')
-        self.assertEqual(parts[0], '1')
+        if sys.hexversion <= 0x03020000:
-        self.assertEqual(parts[1], '5')
+            self.assertRegexpMatches(version, regex)
+        else:
+            self.assertRegex(version, regex)
 
     def test_set_default_decoder_parameters(self):
         # Verify that we properly set the default decode parameters.
+        version = glymur.lib._openjpeg.version()
+        minor = int(version.split('.')[1])
+
         dp = glymur.lib._openjpeg.DecompressionParametersType()
         glymur.lib._openjpeg.set_default_decoder_parameters(ctypes.byref(dp))
 
@@ -41,4 +47,6 @@ class TestOpenJPEG(unittest.TestCase):
         self.assertEqual(dp.jpwl_exp_comps, 0)
         self.assertEqual(dp.jpwl_max_tiles, 0)
         self.assertEqual(dp.cp_limit_decoding, 0)
-        self.assertEqual(dp.flags, 0)
+        if minor > 4:
+            # Introduced in 1.5.x
+            self.assertEqual(dp.flags, 0)

release.txt

@@ -21,8 +21,8 @@
 | Fedora 18  |            |     X      | Ships with 1.5.1.  167 of 445 tests  |
 |            |            |            | should pass.                         |
 +------------+------------+------------+--------------------------------------+
-| Fedora 17  |     X      |            | Ships with 1.4.  Should error out    |
+| Fedora 17  |     X      |            | Ships with 1.4.0.  167 of 445 tests  |
-|            |            |            | gracefully.                          |
+|            |            |            | should pass.                         |
 +------------+------------+------------+--------------------------------------+
 
 Pylint on entire package should be at least 0.95.