Initial commit of the converter image transformation refactor

apps/converter/backends/imagemagick/base.py

@@ -9,7 +9,10 @@ from converter.api import QUALITY_DEFAULT, QUALITY_SETTINGS
 from converter.exceptions import ConvertError, UnknownFormat, \
     IdentifyError
 from converter.backends import ConverterBase
-
+from converter.literals import TRANSFORMATION_RESIZE, \
+    TRANSFORMATION_ROTATE, TRANSFORMATION_DENSITY, \
+    TRANSFORMATION_ZOOM
+    
 CONVERTER_ERROR_STRING_NO_DECODER = u'no decode delegate for this image format'
 
 
@@ -29,6 +32,8 @@ class ConverterClass(ConverterBase):
 
 
     def convert_file(self, input_filepath, output_filepath, quality=QUALITY_DEFAULT, arguments=None):
+        #if format == u'jpg':
+        #    extra_options += u' -quality 85'        
         command = []
         command.append(unicode(IM_CONVERT_PATH))
         command.extend(unicode(QUALITY_SETTINGS[quality]).split())
@@ -73,10 +78,15 @@ class ConverterClass(ConverterBase):
 
 
     def get_available_transformations(self):
-        return {
-            'rotate': {
-                'label': _(u'Rotate [degrees]'),
-                'arguments': [{'name': 'degrees'}],
-                'command_line': u'-rotate %(degrees)d'
-            }
-        }
+        return [
+            TRANSFORMATION_RESIZE, TRANSFORMATION_ROTATE, \
+            TRANSFORMATION_DENSITY, TRANSFORMATION_ZOOM
+        ]
+
+
+    def get_page_count(self, input_filepath):
+        try:
+            return len(self.identify_file(unicode(input_filepath)).splitlines())
+        except:
+            #TODO: send to other page number identifying program
+            return 1