F mode support

PIL/PyAccess.py

@@ -209,6 +209,24 @@ class _PyAccessI16_B(PyAccess):
         pixel.l = color >> 8
         pixel.r = color & 0xFF
 
+
+class _PyAccessF(PyAccess):
+    """ 32 bit float access """
+    def _post_init(self, *args, **kwargs):
+        self.pixels = ffi.cast('float **', self.image32)
+
+    def get_pixel(self, x,y):
+        return self.pixels[y][x]
+
+    def set_pixel(self, x,y, color):
+        try:
+            # not a tuple
+            self.pixels[y][x] = color
+        except:
+            # tuple
+            self.pixels[y][x] = color[0]
+
+
 mode_map = {'1': _PyAccess8,
             'L': _PyAccess8,
             'P': _PyAccess8,
@@ -221,6 +239,7 @@ mode_map = {'1': _PyAccess8,
             'RGBa': _PyAccess32_4,
             'RGBX': _PyAccess32_4,
             'CMYK': _PyAccess32_4,
+            'F': _PyAccessF,
             }
 
 if sys.byteorder == 'little':

Tests/test_cffi.py

@@ -41,6 +41,7 @@ def test_get_vs_c():
     _test_get_access(lena('1'))
     _test_get_access(lena('P'))
     #_test_get_access(lena('PA')) # PA   -- how do I make a PA image???
+    _test_get_access(lena('F'))
     
     im = Image.new('I;16', (10,10), 40000)
     _test_get_access(im)
@@ -49,6 +50,8 @@ def test_get_vs_c():
     im = Image.new('I;16B', (10,10), 40000)
     _test_get_access(im)
     
+
+
 def _test_set_access(im, color):
     """ Are we writing the correct bits into the image? """
 
@@ -70,6 +73,7 @@ def test_set_vs_c():
     _test_set_access(lena('1'), 255)
     _test_set_access(lena('P') , 128)
     ##_test_set_access(i, (128,128)) #PA  -- undone how to make
+    _test_set_access(lena('F'), 1024.0)
     
     im = Image.new('I;16', (10,10), 40000)
     _test_set_access(im, 45000)