Ajout du GUI

kivy/core/image/img_pil.py

@@ -0,0 +1,123 @@
+'''
+PIL: PIL image loader
+'''
+
+__all__ = ('ImageLoaderPIL', )
+
+try:
+    import Image as PILImage
+except ImportError:
+    # for python3
+    from PIL import Image as PILImage
+
+from kivy.logger import Logger
+from kivy.core.image import ImageLoaderBase, ImageData, ImageLoader
+
+try:
+    # Pillow
+    PILImage.frombytes
+    PILImage.Image.tobytes
+except AttributeError:
+    # PIL
+    # monkey patch frombytes and tobytes methods, refs:
+    # https://github.com/kivy/kivy/issues/5460
+    PILImage.frombytes = PILImage.frombuffer
+    PILImage.Image.tobytes = PILImage.Image.tostring
+
+
+class ImageLoaderPIL(ImageLoaderBase):
+    '''Image loader based on the PIL library.
+
+    .. versionadded:: 1.0.8
+
+    Support for GIF animation added.
+
+    Gif animation has a lot of issues(transparency/color depths... etc).
+    In order to keep it simple, what is implemented here is what is
+    natively supported by the PIL library.
+
+    As a general rule, try to use gifs that have no transparency.
+    Gif's with transparency will work but be prepared for some
+    artifacts until transparency support is improved.
+
+    '''
+
+    @staticmethod
+    def can_save(fmt, is_bytesio):
+        if is_bytesio:
+            return False
+        return fmt in ImageLoaderPIL.extensions()
+
+    @staticmethod
+    def can_load_memory():
+        return True
+
+    @staticmethod
+    def extensions():
+        '''Return accepted extensions for this loader'''
+        PILImage.init()
+        return tuple((ext_with_dot[1:] for ext_with_dot in PILImage.EXTENSION))
+
+    def _img_correct(self, _img_tmp):
+        '''Convert image to the correct format and orientation.
+        '''
+        # image loader work only with rgb/rgba image
+        if _img_tmp.mode.lower() not in ('rgb', 'rgba'):
+            try:
+                imc = _img_tmp.convert('RGBA')
+            except:
+                Logger.warning(
+                    'Image: Unable to convert image to rgba (was %s)' %
+                    (_img_tmp.mode.lower()))
+                raise
+            _img_tmp = imc
+
+        return _img_tmp
+
+    def _img_read(self, im):
+        '''Read images from an animated file.
+        '''
+        im.seek(0)
+
+        # Read all images inside
+        try:
+            img_ol = None
+            while True:
+                img_tmp = im
+                img_tmp = self._img_correct(img_tmp)
+                if img_ol and (hasattr(im, 'dispose') and not im.dispose):
+                    # paste new frame over old so as to handle
+                    # transparency properly
+                    img_ol.paste(img_tmp, (0, 0), img_tmp)
+                    img_tmp = img_ol
+                img_ol = img_tmp
+                yield ImageData(img_tmp.size[0], img_tmp.size[1],
+                                img_tmp.mode.lower(), img_tmp.tobytes())
+                im.seek(im.tell() + 1)
+        except EOFError:
+            pass
+
+    def load(self, filename):
+        try:
+            im = PILImage.open(filename)
+        except:
+            Logger.warning('Image: Unable to load image <%s>' % filename)
+            raise
+        # update internals
+        if not self._inline:
+            self.filename = filename
+        # returns an array of type ImageData len 1 if not a sequence image
+        return list(self._img_read(im))
+
+    @staticmethod
+    def save(filename, width, height, pixelfmt, pixels, flipped=False,
+             imagefmt=None):
+        image = PILImage.frombytes(pixelfmt.upper(), (width, height), pixels)
+        if flipped:
+            image = image.transpose(PILImage.FLIP_TOP_BOTTOM)
+        image.save(filename)
+        return True
+
+
+# register
+ImageLoader.register(ImageLoaderPIL)