fix misc errors + write test

Signed-off-by: Mattias Andrée <maandree@operamail.com>

8 files changed, 507 insertions, 241 deletions

diff --git a/src/include-libgamma.h b/src/include-libgamma.h
new file mode 100644
index 0000000..eb857e1
--- /dev/null
+++ b/src/include-libgamma.h
@@ -0,0 +1,19 @@
+/**
+ * pylibgamma — Python 3 wrapper for libgamma
+ * Copyright © 2014  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <libgamma.h>
+
diff --git a/src/libgamma_error.py b/src/libgamma_error.py
index 865d666..0012a21 100644
--- a/src/libgamma_error.py
+++ b/src/libgamma_error.py
@@ -19,71 +19,65 @@ along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
 
 
-class LibgammaGroupGid:
+class LibgammaGroup:
     '''
-    Data descriptor for accessing the
-    `libgamma_group_gid` variable.
+    Class for `group`
     '''
     
-    def __init__(self):
-        '''
-        Constructor.
-        '''
-        pass
-    
-    def __get__(self, obj, obj_type = None) -> int:
+    @property
+    def gid(self) -> int:
         '''
         Getter.
+        
+        Group that the user needs to be a member of if
+        `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned.
         '''
         from libgamma_native_error import libgamma_native_get_group_gid
         return libgamma_native_get_group_gid()
     
-    def __set__(self, obj, value : int):
+    @gid.setter
+    def gid(self, value : int):
         '''
         Setter.
+        
+        Group that the user needs to be a member of if
+        `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned.
         '''
         from libgamma_native_error import libgamma_native_set_group_gid
-        return libgamma_native_set_group_gid(value)
-
-group_gid = LibgammaGroupGid()
-'''
-Group that the user needs to be a member of if
-`LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned.
-'''
-
-
-class LibgammaGroupName:
-    '''
-    Data descriptor for accessing the
-    `libgamma_group_name` variable.
-    '''
+        libgamma_native_set_group_gid(value)
     
-    def __init__(self):
-        '''
-        Constructor.
-        '''
-        pass
     
-    def __get__(self, obj, obj_type = None) -> str:
+    @property
+    def name(self) -> str:
         '''
         Getter.
+        
+        Group that the user needs to be a member of if
+        `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned,
+        `None` if the name of the group `group.gid`
+        cannot be determined.
         '''
         from libgamma_native_error import libgamma_native_get_group_name
         return libgamma_native_get_group_name()
     
-    def __set__(self, obj, value : str):
+    @name.setter
+    def name(self, value : str):
         '''
         Setter.
+        
+        Group that the user needs to be a member of if
+        `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned,
+        `None` if the name of the group `group.gid`
+        cannot be determined.
         '''
         from libgamma_native_error import libgamma_native_set_group_name
-        return libgamma_native_set_group_name()
+        libgamma_native_set_group_name(value)
 
-group_name = LibgammaGroupName()
+
+group = LibgammaGroup()
 '''
-Group that the user needs to be a member of if
-`LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned,
-`None` if the name of the group `group_gid`
-cannot be determined.
+ Group that the user needs to be a member of if
+`LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned.
 '''
 
 
@@ -262,7 +256,7 @@ Device cannot be access, reason unknown.
 LIBGAMMA_DEVICE_REQUIRE_GROUP = -22
 '''
 Device cannot be access, membership of the
-`group_gid` (named by `group_name` (can be
+`group.gid` (named by `group.name` (can be
 `None`, if so `errno` may have been set to
 tell why)) is required.
 '''
diff --git a/src/libgamma_facade.py b/src/libgamma_facade.py
index 830a0b9..5920a5b 100644
--- a/src/libgamma_facade.py
+++ b/src/libgamma_facade.py
@@ -22,7 +22,7 @@ from libgamma_method import MethodCapabilities
 
 
 
-def list_methods(operation : int) -> list
+def list_methods(operation : int) -> list:
     '''
     List available adjustment methods by their order of preference based on the environment.
     
@@ -35,8 +35,8 @@ def list_methods(operation : int) -> list
                          Other values invoke undefined behaviour.
     @return  :list<int>  A list of available adjustment methods.
     '''
-    from libgamma_native_method import libgamma_native_list_methods
-    return libgamma_native_list_methods(method)
+    from libgamma_native_facade import libgamma_native_list_methods
+    return libgamma_native_list_methods(operation)
 
 
 def is_method_available(method : int) -> bool:
@@ -47,7 +47,7 @@ def is_method_available(method : int) -> bool:
     @param   method  The adjustment method.
     @return          Whether the adjustment method is available.
     '''
-    from libgamma_native_method import libgamma_native_is_method_available
+    from libgamma_native_facade import libgamma_native_is_method_available
     return not libgamma_native_is_method_available(method) == 0
 
 
@@ -58,34 +58,35 @@ def method_capabilities(method : int) -> MethodCapabilities:
     @param  this    The data structure to fill with the method's capabilities
     @param  method  The adjustment method (display server and protocol).
     '''
-    from libgamma_native_method import libgamma_native_method_capabilities
+    from libgamma_native_facade import libgamma_native_method_capabilities
     caps = libgamma_native_method_capabilities(method)
-    MethodCapabilities(*caps)
+    return MethodCapabilities(*caps)
 
 
 def method_default_site(method : int) -> str:
     '''
-    Return the capabilities of an adjustment method.
+    Return the default site for an adjustment method.
     
     @param   method  The adjustment method (display server and protocol.)
     @return          The default site, `None` if it cannot be determined or
                      if multiple sites are not supported by the adjustment
                      method.
     '''
-    from libgamma_native_method import libgamma_native_method_default_site
+    from libgamma_native_facade import libgamma_native_method_default_site
     return libgamma_native_method_default_site(method)
 
 
 def method_default_site_variable(method : int) -> str:
     '''
-    Return the capabilities of an adjustment method.
+    Return the default variable that determines
+    the default site for an adjustment method.
     
     @param   method  The adjustment method (display server and protocol.)
     @return          The environ variables that is used to determine the
                      default site. `None` if there is none, that is, if
                      the method does not support multiple sites.
     '''
-    from libgamma_native_method import libgamma_native_method_default_site_variable
+    from libgamma_native_facade import libgamma_native_method_default_site_variable
     return libgamma_native_method_default_site_variable(method)
 
 
@@ -136,7 +137,7 @@ def unhex_edid(edid : str) -> bytes:
     @return        The EDID in raw representation.
     '''
     rc = []
-    edid = edid.lowercase()
+    edid = edid.lower()
     for i in range(0, len(edid), 2):
         a, b = edid[i + 0], edid[i + 1]
         a = '0123456789abcdef'.find(a) << 4
diff --git a/src/libgamma_method.py b/src/libgamma_method.py
index ffdf5f0..1c14049 100644
--- a/src/libgamma_method.py
+++ b/src/libgamma_method.py
@@ -548,7 +548,7 @@ The number of `LIBGAMMA_CRTC_INFO_*` values defined.
 
 
 
-LIBGAMMA_CRTC_INFO_MACRO_EDID_VIEWPORT = LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID |
+LIBGAMMA_CRTC_INFO_MACRO_EDID_VIEWPORT = LIBGAMMA_CRTC_INFO_WIDTH_MM_EDID | \
                                          LIBGAMMA_CRTC_INFO_HEIGHT_MM_EDID
 '''
 Macro for both `CRTCInformation` fields
@@ -557,8 +557,8 @@ as specified in the monitor's Extended Display
 Information Data.
 '''
 
-LIBGAMMA_CRTC_INFO_MACRO_EDID = LIBGAMMA_CRTC_INFO_EDID |
-				LIBGAMMA_CRTC_INFO_MACRO_EDID_VIEWPORT |
+LIBGAMMA_CRTC_INFO_MACRO_EDID = LIBGAMMA_CRTC_INFO_EDID | \
+				LIBGAMMA_CRTC_INFO_MACRO_EDID_VIEWPORT | \
 				LIBGAMMA_CRTC_INFO_GAMMA
 '''
 Macro for all `CRTCInformation` fields
@@ -567,7 +567,7 @@ support for reading the monitors' Extended Display
 Information Data.
 '''
 
-LIBGAMMA_CRTC_INFO_MACRO_VIEWPORT = LIBGAMMA_CRTC_INFO_WIDTH_MM |
+LIBGAMMA_CRTC_INFO_MACRO_VIEWPORT = LIBGAMMA_CRTC_INFO_WIDTH_MM | \
                                     LIBGAMMA_CRTC_INFO_HEIGHT_MM
 '''
 Macro for both `CRTCInformation` fields
@@ -577,7 +577,7 @@ library having to parse the monitor's Extended Display
 Information Data.
 '''
 
-LIBGAMMA_CRTC_INFO_MACRO_RAMP = LIBGAMMA_CRTC_INFO_GAMMA_SIZE |
+LIBGAMMA_CRTC_INFO_MACRO_RAMP = LIBGAMMA_CRTC_INFO_GAMMA_SIZE | \
                                 LIBGAMMA_CRTC_INFO_GAMMA_DEPTH
 '''
 Macro for the `CRTCInformation` fields
@@ -585,7 +585,7 @@ that specifies the CRTC's gamma ramp sizes and gamma
 ramp depth.
 '''
 
-LIBGAMMA_CRTC_INFO_MACRO_CONNECTOR = LIBGAMMA_CRTC_INFO_CONNECTOR_NAME |
+LIBGAMMA_CRTC_INFO_MACRO_CONNECTOR = LIBGAMMA_CRTC_INFO_CONNECTOR_NAME | \
                                      LIBGAMMA_CRTC_INFO_CONNECTOR_TYPE
 '''
 Macro for the `CRTCInformation` fields
@@ -593,9 +593,9 @@ that specifies the CRTC's connector type and the
 partition unique name of the connector.
 '''
 
-LIBGAMMA_CRTC_INFO_MACRO_ACTIVE = LIBGAMMA_CRTC_INFO_MACRO_EDID |
-				  LIBGAMMA_CRTC_INFO_MACRO_VIEWPORT |
-				  LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER |
+LIBGAMMA_CRTC_INFO_MACRO_ACTIVE = LIBGAMMA_CRTC_INFO_MACRO_EDID | \
+				  LIBGAMMA_CRTC_INFO_MACRO_VIEWPORT | \
+				  LIBGAMMA_CRTC_INFO_SUBPIXEL_ORDER | \
 				  LIBGAMMA_CRTC_INFO_ACTIVE
 '''
 Macro for the `CRTCInformation` fields
@@ -609,6 +609,147 @@ class GammaRamps:
     '''
     Gamma ramp structure.
     '''
+        
+    class Ramp:
+        '''
+        A gamma ramp for one single channel.
+        '''
+        
+        def __init__(self, ramp, size : int, depth : int):
+            '''
+            Constructor.
+            
+            @param  ramp   The gamma ramp.
+            @param  size   The number of stops in the gamma ramp.
+            @param  depth  The depth of the gamma ramp.
+            '''
+            from libgamma_native_method import libgamma_native_gamma_ramps8_get
+            from libgamma_native_method import libgamma_native_gamma_ramps16_get
+            from libgamma_native_method import libgamma_native_gamma_ramps32_get
+            from libgamma_native_method import libgamma_native_gamma_ramps64_get
+            from libgamma_native_method import libgamma_native_gamma_rampsf_get
+            from libgamma_native_method import libgamma_native_gamma_rampsd_get
+            from libgamma_native_method import libgamma_native_gamma_ramps8_set
+            from libgamma_native_method import libgamma_native_gamma_ramps16_set
+            from libgamma_native_method import libgamma_native_gamma_ramps32_set
+            from libgamma_native_method import libgamma_native_gamma_ramps64_set
+            from libgamma_native_method import libgamma_native_gamma_rampsf_set
+            from libgamma_native_method import libgamma_native_gamma_rampsd_set
+            self._size = size
+            self._ramp = ramp
+            if   depth ==  8:  fs = (libgamma_native_gamma_ramps8_get,  libgamma_native_gamma_ramps8_set)
+            elif depth == 16:  fs = (libgamma_native_gamma_ramps16_get, libgamma_native_gamma_ramps16_set)
+            elif depth == 32:  fs = (libgamma_native_gamma_ramps32_get, libgamma_native_gamma_ramps32_set)
+            elif depth == 64:  fs = (libgamma_native_gamma_ramps64_get, libgamma_native_gamma_ramps64_set)
+            elif depth == -1:  fs = (libgamma_native_gamma_rampsf_get,  libgamma_native_gamma_rampsf_set)
+            elif depth == -2:  fs = (libgamma_native_gamma_rampsd_get,  libgamma_native_gamma_rampsd_set)
+            (self._get, self._set) = fs
+        
+        
+        @property
+        def size(self) -> int:
+            '''
+            Get the number of stops in the gamma ramp.
+            
+            @return  The number of stops in the gamma ramp.
+            '''
+            return self._size
+        
+        @size.setter
+        def size(self, value : int):
+            '''
+            It is not possible to change this attribute, but a setter is
+            required for the getter to function.
+            '''
+            raise AttributeError('cannot resize ramp')
+            
+        def __len__(self) -> int:
+            '''
+            Get the number of stops in the gamma ramp.
+            
+            @return  The number of stops in the gamma ramp.
+            '''
+            return self._size
+        
+        def __getitem__(self, indices):
+            '''
+            Read the gamma ramp.
+            
+            @param   indices:slice     The stops to read.
+            @return  :list<int|float>  The values of the read stops.
+            
+            -- OR --
+            
+            @param   indices:int  The index of the stop to read.
+            @return  :int|float   The value of the read stop.
+            '''
+            if isinstance(indices, slice):
+                start = indices.start
+                stop = indices.stop
+                step = indices.step
+                if start is None:  start = 0
+                elif start < 0:    start += self._size
+                if stop is None:   stop = self._size
+                elif stop < 0:     stop += self._size
+                if step is None:   step = 1
+                return [self._get(self._ramp, i) for i in range(start, stop, step)]
+            else:
+                if indices < 0:
+                    indices += self._size
+                return self._get(self._ramp, indices)
+        
+        def __setitem__(self, indices, values):
+            '''
+            Modify the gamma ramp.
+            
+            @param  indices:slice          The stops to modify.
+            @param  values:itr<int|float>  The values for the selected stops.
+            
+            -- OR --
+            
+            @param  indices:int        The index of the stop to modify.
+            @param  values:int|float   The new value for the stop.
+            '''
+            if isinstance(indices, slice):
+                start = indices.start
+                stop = indices.stop
+                step = indices.step
+                if start is None:  start = 0
+                elif start < 0:    start += self._size
+                if stop is None:   stop = self._size
+                elif stop < 0:     stop += self._size
+                if step is None:   step = 1
+                indices = list(range(start, stop, step))
+                if not len(indices) == len(values):
+                    raise ValueError('cannot resize ramp')
+                for index, value in zip(indices, values):
+                    self._set(self._ramp, index, value)
+            else:
+                if indices < 0:
+                    indices += self._size
+                self._set(self._ramp, indices, values)
+        
+        def __iter__(self) -> iter:
+            '''
+            Read the gamma ramp.
+            
+            @return  :itr<int|float>  The values of each stop.
+            '''
+            for value in self[:]:
+                yield value
+        
+        def map(self, function):
+            '''
+            Modify the entire ramp using a function that
+            maps encoding value to output value.
+            
+            @param  function:(float)→int|float  Function that takes the encoding value as a
+            [0, 1] floating point and returns its output
+            value as the format using in the gamma ramp.
+            '''
+            max_i = self._size - 1
+            for i in range(self._size):
+                self._set(self._ramp, i, function(i / max_i))
     
     def __init__(self, red_size : int, green_size : int = ..., blue_size : int = ..., *, depth : int = 16):
         '''
@@ -622,159 +763,110 @@ class GammaRamps:
         if green_size is ...:  green_size = red_size
         if blue_size is ...:   blue_size = green_size
         
-        self.__depth = depth
-        if depth not in (8, 16, 32, 64, -1, -2):
-            raise ValueError('invalid gamma ramp depth')
+        self._depth = depth
         
+        from libgamma_native_method import libgamma_native_gamma_ramps8_create
+        from libgamma_native_method import libgamma_native_gamma_ramps16_create
+        from libgamma_native_method import libgamma_native_gamma_ramps32_create
+        from libgamma_native_method import libgamma_native_gamma_ramps64_create
+        from libgamma_native_method import libgamma_native_gamma_rampsf_create
+        from libgamma_native_method import libgamma_native_gamma_rampsd_create
         if   depth ==  8:  ramp_struct = libgamma_native_gamma_ramps8_create (red_size, green_size, blue_size)
         elif depth == 16:  ramp_struct = libgamma_native_gamma_ramps16_create(red_size, green_size, blue_size)
         elif depth == 32:  ramp_struct = libgamma_native_gamma_ramps32_create(red_size, green_size, blue_size)
         elif depth == 64:  ramp_struct = libgamma_native_gamma_ramps64_create(red_size, green_size, blue_size)
         elif depth == -1:  ramp_struct = libgamma_native_gamma_rampsf_create (red_size, green_size, blue_size)
         elif depth == -2:  ramp_struct = libgamma_native_gamma_rampsd_create (red_size, green_size, blue_size)
+        else:
+            raise ValueError('invalid gamma ramp depth')
         if isinstance(ramp_struct, int):
             import c
             error = OSError()
             error.errno = ramp_struct
             error.strerror = c.strerror(error.errno)
             raise error
-        (self.__ramps, red, green, blue) = ramp_struct
+        (self._ramps, red, green, blue) = ramp_struct
         
-        class Ramp:
-            '''
-            A gamma ramp for one single channel.
-            '''
-            
-            def __init__(self, ramp, size : int, depth : int):
-                '''
-                Constructor.
-                
-                @param  ramp   The gamma ramp.
-                @param  size   The number of stops in the gamma ramp.
-                @param  depth  The depth of the gamma ramp.
-                '''
-                self.__size = size
-                self.__ramp = ramp
-                if   depth ==  8:  fs = (libgamma_native_gamma_ramps8_get,  libgamma_native_gamma_ramps8_set)
-                elif depth == 16:  fs = (libgamma_native_gamma_ramps16_get, libgamma_native_gamma_ramps16_set)
-                elif depth == 32:  fs = (libgamma_native_gamma_ramps32_get, libgamma_native_gamma_ramps32_set)
-                elif depth == 64:  fs = (libgamma_native_gamma_ramps64_get, libgamma_native_gamma_ramps64_set)
-                elif depth == -1:  fs = (libgamma_native_gamma_rampsf_get,  libgamma_native_gamma_rampsf_set)
-                elif depth == -2:  fs = (libgamma_native_gamma_rampsd_get,  libgamma_native_gamma_rampsd_set)
-                (self.__get, self.__set) = fs
-            
-            
-            @property
-            def size(self) -> int:
-                '''
-                Get the number of stops in the gamma ramp.
-                
-                @return  The number of stops in the gamma ramp.
-                '''
-                return self.__size
-            
-            @size.setter
-            def size(self, value : int):
-                '''
-                It is not possible to change this attribute, but a setter is
-                required for the getter to function.
-                '''
-                raise AttributeError('cannot resize ramp')
-            
-            def __len__(self) -> int:
-                '''
-                Get the number of stops in the gamma ramp.
-                
-                @return  The number of stops in the gamma ramp.
-                '''
-                return self.__size
-            
-            def __getitem__(self, indices):
-                '''
-                Read the gamma ramp.
-                
-                @param   indices:slice     The stops to read.
-                @return  :list<int|float>  The values of the read stops.
-                
-                -- OR --
-                
-                @param   indices:int  The index of the stop to read.
-                @return  :int|float   The value of the read stop.
-                '''
-                if isinstance(indices, slice):
-                    start = indices.start
-                    stop = indices.stop
-                    step = indices.step
-                    if start is None:  start = 0
-                    elif start < 0:    start += self.__size
-                    if stop is None:   stop = self.__size
-                    elif stop < 0:     stop += self.__size
-                    if step is None:   step = 1
-                    return [self.__get(self.__ramp, i) for i in range(start, stop, step)]
-                else:
-                    if indices < 0:
-                        indices += self.__size
-                    return self.__get(self.__ramp, indices)
-            
-            def __setitem__(self, indices, values):
-                '''
-                Modify the gamma ramp.
-                
-                @param  indices:slice          The stops to modify.
-                @param  values:itr<int|float>  The values for the selected stops.
-                
-                -- OR --
-                
-                @param  indices:int        The index of the stop to modify.
-                @param  values:int|float   The new value for the stop.
-                '''
-                if isinstance(indices, slice):
-                    start = indices.start
-                    stop = indices.stop
-                    step = indices.step
-                    if start is None:  start = 0
-                    elif start < 0:    start += self.__size
-                    if stop is None:   stop = self.__size
-                    elif stop < 0:     stop += self.__size
-                    if step is None:   step = 1
-                    indices = list(range(start, stop, step))
-                    if not len(indices) == len(values):
-                        raise ValueError('cannot resize ramp')
-                    for index, value in zip(indices, values):
-                        self.__set(self.__ramp, index, value)
-                else:
-                    if indices < 0:
-                        indices += self.__size
-                    self.__set(self.__ramp, indices, values)
-            
-            def map(self, function):
-                '''
-                Modify the entire ramp using a function that
-                maps encoding value to output value.
-                
-                @param  function:(float)→int|float  Function that takes the encoding value as a
-                                                    [0, 1] floating point and returns its output
-                                                    value as the format using in the gamma ramp.
-                '''
-                max_i = self.__size - 1
-                for i in range(self.__size):
-                    self.__set(self.__ramp, i, function(i / max_i))
-        
-        self.red   = Ramp(red,   red_size,   depth)
-        self.green = Ramp(green, green_size, depth)
-        self.blue  = Ramp(blue,  blue_size,  depth)
+        self._red   = GammaRamps.Ramp(red,   red_size,   depth)
+        self._green = GammaRamps.Ramp(green, green_size, depth)
+        self._blue  = GammaRamps.Ramp(blue,  blue_size,  depth)
     
     
     def __del__(self):
         '''
         This function is called when the object is not longer in use.
         '''
-        if   self.__depth ==  8:  libgamma_native_gamma_ramps8_free(self.__ramps)
-        elif self.__depth == 16:  libgamma_native_gamma_ramps16_free(self.__ramps)
-        elif self.__depth == 32:  libgamma_native_gamma_ramps32_free(self.__ramps)
-        elif self.__depth == 64:  libgamma_native_gamma_ramps64_free(self.__ramps)
-        elif self.__depth == -1:  libgamma_native_gamma_rampsf_free(self.__ramps)
-        elif self.__depth == -2:  libgamma_native_gamma_rampsd_free(self.__ramps)
+        from libgamma_native_method import libgamma_native_gamma_ramps8_free
+        from libgamma_native_method import libgamma_native_gamma_ramps16_free
+        from libgamma_native_method import libgamma_native_gamma_ramps32_free
+        from libgamma_native_method import libgamma_native_gamma_ramps64_free
+        from libgamma_native_method import libgamma_native_gamma_rampsf_free
+        from libgamma_native_method import libgamma_native_gamma_rampsd_free
+        if self._ramps == 0:
+            return
+        if   self._depth ==  8:  libgamma_native_gamma_ramps8_free(self._ramps)
+        elif self._depth == 16:  libgamma_native_gamma_ramps16_free(self._ramps)
+        elif self._depth == 32:  libgamma_native_gamma_ramps32_free(self._ramps)
+        elif self._depth == 64:  libgamma_native_gamma_ramps64_free(self._ramps)
+        elif self._depth == -1:  libgamma_native_gamma_rampsf_free(self._ramps)
+        elif self._depth == -2:  libgamma_native_gamma_rampsd_free(self._ramps)
+    
+    
+    @property
+    def red(self) -> Ramp:
+        '''
+        Get the gamma ramp for the red channel.
+        
+        @return  The gamma ramp for the red channel.
+        '''
+        return self._red
+    
+    
+    @red.setter
+    def red(self, value):
+        '''
+        It is not possible to change this attribute, but a setter is
+        required for the getter to function.
+        '''
+        raise AttributeError('cannot change ramps')
+    
+    
+    @property
+    def green(self) -> Ramp:
+        '''
+        Get the gamma ramp for the green channel.
+        
+        @return  The gamma ramp for the green channel.
+        '''
+        return self._green
+    
+    
+    @green.setter
+    def green(self, value) -> Ramp:
+        '''
+        It is not possible to change this attribute, but a setter is
+        required for the getter to function.
+        '''
+        raise AttributeError('cannot change ramps')
+    
+    
+    @property
+    def blue(self):
+        '''
+        Get the gamma ramp for the blue channel.
+        
+        @return  The gamma ramp for the blue channel.
+        '''
+        return self._blue
+    
+    
+    @blue.setter
+    def blue(self, value):
+        '''
+        It is not possible to change this attribute, but a setter is
+        required for the getter to function.
+        '''
+        raise AttributeError('cannot change ramps')
     
     
     @property
@@ -784,7 +876,7 @@ class GammaRamps:
         
         @return  :(red:int, green:int, blue:int)  The size of each individual ramp.
         '''
-        return (self.red.size, self.green.size, self.blue.size)
+        return (self._red.size, self._green.size, self._blue.size)
     
     
     @size.setter
@@ -804,10 +896,10 @@ class GammaRamps:
         @return  :int  The ramps' depth in bits and -1 for single precision floating
                        point and -2 for doublesingle precision floating point
         '''
-        return self.__depth
+        return self._depth
     
     
-    @size.setter
+    @depth.setter
     def depth(self, value):
         '''
         It is not possible to change this attribute, but a setter is
@@ -840,8 +932,8 @@ class Site:
         @param  site:str?   The site identifier
         '''
         from libgamma_native_facade import libgamma_native_site_create
-        (self.__state, n) = libgamma_native_site_create(method, site)
-        if self.__state == 0:
+        (self._state, n) = libgamma_native_site_create(method, site)
+        if self._state == 0:
             raise create_error(n)
         self.partitions_available = n
         self.method = method
@@ -853,7 +945,8 @@ class Site:
         This function is called when the object is not longer in use.
         '''
         from libgamma_native_facade import libgamma_native_site_free
-        libgamma_native_site_free(self.__state)
+        if not self._state == 0:
+            libgamma_native_site_free(self._state)
     
     
     def restore(self):
@@ -861,7 +954,7 @@ class Site:
         Restore the gamma ramps all CRTC:s with the site to the system settings.
         '''
         from libgamma_native_facade import libgamma_native_site_restore
-        r = libgamma_native_site_restore(self.__state)
+        r = libgamma_native_site_restore(self._state)
         if not r == 0:
             raise create_error(r)
 
@@ -892,8 +985,8 @@ class Partition:
         @param  partition  The index of the partition
         '''
         from libgamma_native_facade import libgamma_native_partition_create
-        (self.__state, n) = libgamma_native_partition_create(site, partition)
-        if self.__state == 0:
+        (self._state, n) = libgamma_native_partition_create(site._state, partition)
+        if self._state == 0:
             raise create_error(n)
         self.crtcs_available = n
         self.site = site
@@ -905,7 +998,8 @@ class Partition:
         This function is called when the object is not longer in use.
         '''
         from libgamma_native_facade import libgamma_native_partition_free
-        libgamma_native_partition_free(self.__state)
+        if not self._state == 0:
+            libgamma_native_partition_free(self._state)
     
     
     def restore(self):
@@ -913,7 +1007,7 @@ class Partition:
         Restore the gamma ramps all CRTC:s with the partition to the system settings.
         '''
         from libgamma_native_facade import libgamma_native_partition_restore
-        r = libgamma_native_partition_restore(self.__state)
+        r = libgamma_native_partition_restore(self._state)
         if not r == 0:
             raise create_error(r)
 
@@ -938,8 +1032,8 @@ class CRTC:
         @param  crtc       The index of the CRTC
         '''
         from libgamma_native_facade import libgamma_native_crtc_create
-        (self.__state, n) = libgamma_native_crtc_create(partition, crtc)
-        if self.__state == 0:
+        (self._state, n) = libgamma_native_crtc_create(partition._state, crtc)
+        if self._state == 0:
             raise create_error(n)
         self.partition = partition
         self.crtc = crtc
@@ -950,7 +1044,8 @@ class CRTC:
         This function is called when the object is not longer in use.
         '''
         from libgamma_native_facade import libgamma_native_crtc_free
-        libgamma_native_crtc_free(self.__state)
+        if not self._state == 0:
+            libgamma_native_crtc_free(self._state)
     
     
     def restore(self):
@@ -958,12 +1053,12 @@ class CRTC:
         Restore the gamma ramps for a CRTC to the system settings for that CRTC.
         '''
         from libgamma_native_facade import libgamma_native_crtc_restore
-        r = libgamma_native_crtc_restore(self.__state)
+        r = libgamma_native_crtc_restore(self._state)
         if not r == 0:
             raise create_error(r)
     
     
-    def information(fields : int) -> tuple:
+    def information(self, fields : int) -> tuple:
         '''
         Read information about a CRTC.
         
@@ -973,38 +1068,50 @@ class CRTC:
                                              whether no errors occurred.
         '''
         from libgamma_native_facade import libgamma_native_get_crtc_information
-        (data, e) = libgamma_native_get_crtc_information(self.__state, fields)
+        (data, e) = libgamma_native_get_crtc_information(self._state, fields)
         return (CRTCInformation(data), e == 0)
     
     
-    def get_gamma(ramps : GammaRamps):
+    def get_gamma(self, ramps : GammaRamps):
         '''
         Get the current gamma ramps for the CRTC.
         
         @param  ramps  The gamma ramps to fill with the current values.
         '''
-        if   ramps.depth ==  8:  r = libgamma_native_crtc_get_gamma_ramps8(self.__state, ramps.__ramp)
-        elif ramps.depth == 16:  r = libgamma_native_crtc_get_gamma_ramps16(self.__state, ramps.__ramp)
-        elif ramps.depth == 32:  r = libgamma_native_crtc_get_gamma_ramps32(self.__state, ramps.__ramp)
-        elif ramps.depth == 64:  r = libgamma_native_crtc_get_gamma_ramps64(self.__state, ramps.__ramp)
-        elif ramps.depth == -1:  r = libgamma_native_crtc_get_gamma_rampsf(self.__state, ramps.__ramp)
-        elif ramps.depth == -2:  r = libgamma_native_crtc_get_gamma_rampsd(self.__state, ramps.__ramp)
+        from libgamma_native_facade import libgamma_native_crtc_get_gamma_ramps8
+        from libgamma_native_facade import libgamma_native_crtc_get_gamma_ramps16
+        from libgamma_native_facade import libgamma_native_crtc_get_gamma_ramps32
+        from libgamma_native_facade import libgamma_native_crtc_get_gamma_ramps64
+        from libgamma_native_facade import libgamma_native_crtc_get_gamma_rampsf
+        from libgamma_native_facade import libgamma_native_crtc_get_gamma_rampsd
+        if   ramps.depth ==  8:  r = libgamma_native_crtc_get_gamma_ramps8(self._state, ramps._ramps)
+        elif ramps.depth == 16:  r = libgamma_native_crtc_get_gamma_ramps16(self._state, ramps._ramps)
+        elif ramps.depth == 32:  r = libgamma_native_crtc_get_gamma_ramps32(self._state, ramps._ramps)
+        elif ramps.depth == 64:  r = libgamma_native_crtc_get_gamma_ramps64(self._state, ramps._ramps)
+        elif ramps.depth == -1:  r = libgamma_native_crtc_get_gamma_rampsf(self._state, ramps._ramps)
+        elif ramps.depth == -2:  r = libgamma_native_crtc_get_gamma_rampsd(self._state, ramps._ramps)
         if not r == 0:
             raise create_error(r)
     
     
-    def set_gamma(ramps : GammaRamps):
+    def set_gamma(self, ramps : GammaRamps):
         '''
         Set gamma ramps for the CRTC.
         
         @param  ramps  The gamma ramps to apply.
         '''
-        if   ramps.depth ==  8:  r = libgamma_native_crtc_set_gamma_ramps8(self.__state, ramps.__ramp)
-        elif ramps.depth == 16:  r = libgamma_native_crtc_set_gamma_ramps16(self.__state, ramps.__ramp)
-        elif ramps.depth == 32:  r = libgamma_native_crtc_set_gamma_ramps32(self.__state, ramps.__ramp)
-        elif ramps.depth == 64:  r = libgamma_native_crtc_set_gamma_ramps64(self.__state, ramps.__ramp)
-        elif ramps.depth == -1:  r = libgamma_native_crtc_set_gamma_rampsf(self.__state, ramps.__ramp)
-        elif ramps.depth == -2:  r = libgamma_native_crtc_set_gamma_rampsd(self.__state, ramps.__ramp)
+        from libgamma_native_facade import libgamma_native_crtc_set_gamma_ramps8
+        from libgamma_native_facade import libgamma_native_crtc_set_gamma_ramps16
+        from libgamma_native_facade import libgamma_native_crtc_set_gamma_ramps32
+        from libgamma_native_facade import libgamma_native_crtc_set_gamma_ramps64
+        from libgamma_native_facade import libgamma_native_crtc_set_gamma_rampsf
+        from libgamma_native_facade import libgamma_native_crtc_set_gamma_rampsd
+        if   ramps.depth ==  8:  r = libgamma_native_crtc_set_gamma_ramps8(self._state, ramps._ramps)
+        elif ramps.depth == 16:  r = libgamma_native_crtc_set_gamma_ramps16(self._state, ramps._ramps)
+        elif ramps.depth == 32:  r = libgamma_native_crtc_set_gamma_ramps32(self._state, ramps._ramps)
+        elif ramps.depth == 64:  r = libgamma_native_crtc_set_gamma_ramps64(self._state, ramps._ramps)
+        elif ramps.depth == -1:  r = libgamma_native_crtc_set_gamma_rampsf(self._state, ramps._ramps)
+        elif ramps.depth == -2:  r = libgamma_native_crtc_set_gamma_rampsd(self._state, ramps._ramps)
         if not r == 0:
             raise create_error(r)
 
diff --git a/src/libgamma_native_error.pyx b/src/libgamma_native_error.pyx
index b10dc5a..d88f7fe 100644
--- a/src/libgamma_native_error.pyx
+++ b/src/libgamma_native_error.pyx
@@ -93,6 +93,7 @@ def libgamma_native_set_group_gid(gid : int):
     Group that the user needs to be a member of if
     `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned.
     '''
+    global libgamma_group_gid
     libgamma_group_gid = <int>gid
 
 
@@ -120,6 +121,7 @@ def libgamma_native_set_group_name(name : str):
     `None` if the name of the group `libgamma_group_gid`
     cannot be determined.
     '''
+    global libgamma_group_name
     cdef bytes bs
     if name is None:
         libgamma_group_name = <char*>NULL
diff --git a/src/libgamma_native_facade.pyx b/src/libgamma_native_facade.pyx
index 41ab169..48bec73 100644
--- a/src/libgamma_native_facade.pyx
+++ b/src/libgamma_native_facade.pyx
@@ -29,7 +29,7 @@ ctypedef int libgamma_subpixel_order_t
 ctypedef int libgamma_connector_type_t
 
 
-cdef extern from "libgamma/libgamma-method.h":
+cdef extern from "include-libgamma.h":
     
     ctypedef struct libgamma_method_capabilities_t:
         # Capabilities of adjustment methods.
@@ -490,7 +490,7 @@ Return the capabilities of an adjustment method.
 
 cdef extern char* libgamma_method_default_site(int method)
 '''
-Return the capabilities of an adjustment method.
+Return the default site for an adjustment method.
 
 @param   method  The adjustment method (display server and protocol.)
 @return          The default site, `NULL` if it cannot be determined or
@@ -501,7 +501,8 @@ Return the capabilities of an adjustment method.
 
 cdef extern const char* libgamma_method_default_site_variable(int method)
 '''
-Return the capabilities of an adjustment method.
+Return the default variable that determines
+the default site for an adjustment method.
 
 @param   method  The adjustment method (display server and protocol.)
 @return          The environ variables that is used to determine the
@@ -846,7 +847,7 @@ def libgamma_native_method_capabilities(method : int) -> tuple:
 
 def libgamma_native_method_default_site(method : int) -> str:
     '''
-    Return the capabilities of an adjustment method.
+    Return the default site for an adjustment method.
     
     @param   method  The adjustment method (display server and protocol.)
     @return          The default site, `None` if it cannot be determined or
@@ -862,7 +863,8 @@ def libgamma_native_method_default_site(method : int) -> str:
 
 def libgamma_native_method_default_site_variable(method : int) -> str:
     '''
-    Return the capabilities of an adjustment method.
+    Return the default variable that determines
+    the default site for an adjustment method.
     
     @param   method  The adjustment method (display server and protocol.)
     @return          The environ variables that is used to determine the
diff --git a/src/libgamma_native_method.pyx b/src/libgamma_native_method.pyx
index 58ab1a3..0fd27ec 100644
--- a/src/libgamma_native_method.pyx
+++ b/src/libgamma_native_method.pyx
@@ -25,7 +25,7 @@ from libc.stddef cimport size_t
 from libc.errno cimport errno
 
 
-cdef extern from "libgamma/libgamma-method.h":
+cdef extern from "include-libgamma.h":
     ctypedef struct libgamma_gamma_ramps8_t:
         # Gamma ramp structure for 8-bit gamma ramps.
         size_t red_size
@@ -274,11 +274,16 @@ def libgamma_native_gamma_ramps8_create(red_size : int, green_size : int, blue_s
     cdef libgamma_gamma_ramps8_t* item = <libgamma_gamma_ramps8_t*>allocation
     cdef size_t red, green, blue
     if item is NULL:
-        return errno
+        return int(errno)
+    item.red_size   = red_size
+    item.green_size = green_size
+    item.blue_size  = blue_size
+    if libgamma_gamma_ramps8_initialise(item) < 0:
+        return int(errno)
     red   = <size_t><void*>(item.red)
     green = <size_t><void*>(item.green)
     blue  = <size_t><void*>(item.blue)
-    return (int(<size_t>allocation), int(red), int(blue), int(blue))
+    return (int(<size_t>allocation), int(red), int(green), int(blue))
 
 
 def libgamma_native_gamma_ramps8_free(this : int):
@@ -340,11 +345,16 @@ def libgamma_native_gamma_ramps16_create(red_size : int, green_size : int, blue_
     cdef libgamma_gamma_ramps16_t* item = <libgamma_gamma_ramps16_t*>allocation
     cdef size_t red, green, blue
     if item is NULL:
-        return errno
+        return int(errno)
+    item.red_size   = red_size
+    item.green_size = green_size
+    item.blue_size  = blue_size
+    if libgamma_gamma_ramps16_initialise(item) < 0:
+        return int(errno)
     red   = <size_t><void*>(item.red)
     green = <size_t><void*>(item.green)
     blue  = <size_t><void*>(item.blue)
-    return (int(<size_t>allocation), int(red), int(blue), int(blue))
+    return (int(<size_t>allocation), int(red), int(green), int(blue))
 
 
 def libgamma_native_gamma_ramps16_free(this : int):
@@ -406,11 +416,16 @@ def libgamma_native_gamma_ramps32_create(red_size : int, green_size : int, blue_
     cdef libgamma_gamma_ramps32_t* item = <libgamma_gamma_ramps32_t*>allocation
     cdef size_t red, green, blue
     if item is NULL:
-        return errno
+        return int(errno)
+    item.red_size   = red_size
+    item.green_size = green_size
+    item.blue_size  = blue_size
+    if libgamma_gamma_ramps32_initialise(item) < 0:
+        return int(errno)
     red   = <size_t><void*>(item.red)
     green = <size_t><void*>(item.green)
     blue  = <size_t><void*>(item.blue)
-    return (int(<size_t>allocation), int(red), int(blue), int(blue))
+    return (int(<size_t>allocation), int(red), int(green), int(blue))
 
 
 def libgamma_native_gamma_ramps32_free(this : int):
@@ -472,11 +487,16 @@ def libgamma_native_gamma_ramps64_create(red_size : int, green_size : int, blue_
     cdef libgamma_gamma_ramps64_t* item = <libgamma_gamma_ramps64_t*>allocation
     cdef size_t red, green, blue
     if item is NULL:
-        return errno
+        return int(errno)
+    item.red_size   = red_size
+    item.green_size = green_size
+    item.blue_size  = blue_size
+    if libgamma_gamma_ramps64_initialise(item) < 0:
+        return int(errno)
     red   = <size_t><void*>(item.red)
     green = <size_t><void*>(item.green)
     blue  = <size_t><void*>(item.blue)
-    return (int(<size_t>allocation), int(red), int(blue), int(blue))
+    return (int(<size_t>allocation), int(red), int(green), int(blue))
 
 
 def libgamma_native_gamma_ramps64_free(this : int):
@@ -538,11 +558,16 @@ def libgamma_native_gamma_rampsf_create(red_size : int, green_size : int, blue_s
     cdef libgamma_gamma_rampsf_t* item = <libgamma_gamma_rampsf_t*>allocation
     cdef size_t red, green, blue
     if item is NULL:
-        return errno
+        return int(errno)
+    item.red_size   = red_size
+    item.green_size = green_size
+    item.blue_size  = blue_size
+    if libgamma_gamma_rampsf_initialise(item) < 0:
+        return int(errno)
     red   = <size_t><void*>(item.red)
     green = <size_t><void*>(item.green)
     blue  = <size_t><void*>(item.blue)
-    return (int(<size_t>allocation), int(red), int(blue), int(blue))
+    return (int(<size_t>allocation), int(red), int(green), int(blue))
 
 
 def libgamma_native_gamma_rampsf_free(this : int):
@@ -604,11 +629,16 @@ def libgamma_native_gamma_rampsd_create(red_size : int, green_size : int, blue_s
     cdef libgamma_gamma_rampsd_t* item = <libgamma_gamma_rampsd_t*>allocation
     cdef size_t red, green, blue
     if item is NULL:
-        return errno
+        return int(errno)
+    item.red_size   = red_size
+    item.green_size = green_size
+    item.blue_size  = blue_size
+    if libgamma_gamma_rampsd_initialise(item) < 0:
+        return int(errno)
     red   = <size_t><void*>(item.red)
     green = <size_t><void*>(item.green)
     blue  = <size_t><void*>(item.blue)
-    return (int(<size_t>allocation), int(red), int(blue), int(blue))
+    return (int(<size_t>allocation), int(red), int(green), int(blue))
 
 
 def libgamma_native_gamma_rampsd_free(this : int):
diff --git a/src/test.py b/src/test.py
new file mode 100755
index 0000000..ca70072
--- /dev/null
+++ b/src/test.py
@@ -0,0 +1,111 @@
+#!/usr/bin/env python3
+# -*- python -*-
+'''
+pylibgamma — Python 3 wrapper for libgamma
+Copyright © 2014  Mattias Andrée (maandree@member.fsf.org)
+
+This library is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this library.  If not, see <http://www.gnu.org/licenses/>.
+'''
+
+import libgamma
+from time import sleep
+
+
+method = libgamma.list_methods(0)[0]
+assert libgamma.is_method_available(method) == True
+
+print(libgamma.method_capabilities(method).__dict__)
+print()
+
+print(repr(libgamma.method_default_site_variable(method)))
+print(repr(libgamma.method_default_site(method)))
+print
+
+print(repr(libgamma.unhex_edid('0123456789ABCDEF')))
+print(repr(libgamma.unhex_edid('0123456789abcdef')))
+print(repr(libgamma.behex_edid(libgamma.unhex_edid('0123456789abcdef'))))
+print(repr(libgamma.behex_edid_lowercase(libgamma.unhex_edid('0123456789abcdef'))))
+print(repr(libgamma.behex_edid_uppercase(libgamma.unhex_edid('0123456789abcdef'))))
+print()
+
+print(libgamma.group.gid)
+libgamma.group.gid = 10
+print(libgamma.group.gid)
+print()
+
+print(repr(libgamma.group.name))
+libgamma.group.name = 'group'
+print(repr(libgamma.group.name))
+print()
+
+libgamma.perror('test', 0)
+libgamma.perror('test', libgamma.LIBGAMMA_ERRNO_SET)
+libgamma.perror('test', libgamma.LIBGAMMA_NO_SUCH_ADJUSTMENT_METHOD)
+print()
+
+print(repr(libgamma.name_of_error(libgamma.LIBGAMMA_NO_SUCH_SITE)))
+print(repr(libgamma.value_of_error('LIBGAMMA_NO_SUCH_SITE')))
+print(libgamma.LIBGAMMA_NO_SUCH_SITE)
+print()
+
+print(libgamma.create_error(1))
+print(libgamma.create_error(0))
+print(libgamma.create_error(-1))
+print(libgamma.create_error(-2))
+print()
+
+site = libgamma.Site(method)
+print(site.partitions_available)
+partition = libgamma.Partition(site, 0)
+print(partition.crtcs_available)
+crtc = libgamma.CRTC(partition, 0)
+info = crtc.information(~0)[0]
+print(info.__dict__)
+print()
+
+ramp_sizes = (info.red_gamma_size, info.green_gamma_size, info.blue_gamma_size)
+ramps = libgamma.GammaRamps(*ramp_sizes, depth = info.gamma_depth)
+crtc.get_gamma(ramps)
+print(list(ramps.red))
+print()
+print(list(ramps.green))
+print()
+print(list(ramps.blue))
+print()
+
+saved_red = list(ramps.red)
+saved_green = list(ramps.green)
+saved_blue = list(ramps.blue)
+
+ramps.red[:] = list(map(lambda x : x // 2, saved_red))
+ramps.green[:] = list(map(lambda x : x // 2, saved_green))
+ramps.blue[:] = list(map(lambda x : x // 2, saved_blue))
+
+crtc.set_gamma(ramps)
+
+sleep(1)
+
+ramps.red[:] = saved_red
+ramps.green[:] = saved_green
+ramps.blue[:] = saved_blue
+
+crtc.set_gamma(ramps)
+
+# If not done expressively, if in the root scope,
+# we sometimes get ignored errors on exit
+del site
+del partition
+del crtc
+del ramps
+