--- a/thirdparty/google_appengine/google/appengine/api/images/images_stub.py Tue Apr 21 16:28:13 2009 +0000
+++ b/thirdparty/google_appengine/google/appengine/api/images/images_stub.py Fri Apr 24 14:16:00 2009 +0000
@@ -48,6 +48,92 @@
super(ImagesServiceStub, self).__init__(service_name)
Image.init()
+ def _Dynamic_Composite(self, request, response):
+ """Implementation of ImagesService::Composite.
+
+ Based off documentation of the PIL library at
+ http://www.pythonware.com/library/pil/handbook/index.htm
+
+ Args:
+ request: ImagesCompositeRequest, contains image request info.
+ response: ImagesCompositeResponse, contains transformed image.
+ """
+ width = request.canvas().width()
+ height = request.canvas().height()
+ color = request.canvas().color() % 0x100000000
+ reordered_color = int((color & 0xff000000) | ((color >> 16) & 0xff) |
+ (color & 0xff00) | (color & 0xff) << 16)
+ canvas = Image.new("RGBA", (width, height), reordered_color)
+ sources = []
+ if (not request.canvas().width() or request.canvas().width() > 4000 or
+ not request.canvas().height() or request.canvas().height() > 4000):
+ raise apiproxy_errors.ApplicationError(
+ images_service_pb.ImagesServiceError.BAD_TRANSFORM_DATA)
+ if not request.image_size():
+ raise apiproxy_errors.ApplicationError(
+ images_service_pb.ImagesServiceError.BAD_TRANSFORM_DATA)
+ if not request.options_size():
+ raise apiproxy_errors.ApplicationError(
+ images_service_pb.ImagesServiceError.BAD_TRANSFORM_DATA)
+ if request.options_size() > images.MAX_COMPOSITES_PER_REQUEST:
+ raise apiproxy_errors.ApplicationError(
+ images_service_pb.ImagesServiceError.BAD_TRANSFORM_DATA)
+ for image in request.image_list():
+ sources.append(self._OpenImage(image.content()))
+
+ for options in request.options_list():
+ if (options.anchor() < images.TOP_LEFT or
+ options.anchor() > images.BOTTOM_RIGHT):
+ raise apiproxy_errors.ApplicationError(
+ images_service_pb.ImagesServiceError.BAD_TRANSFORM_DATA)
+ if options.source_index() >= len(sources) or options.source_index() < 0:
+ raise apiproxy_errors.ApplicationError(
+ images_service_pb.ImagesServiceError.BAD_TRANSFORM_DATA)
+ if options.opacity() < 0 or options.opacity() > 1:
+ raise apiproxy_errors.ApplicationError(
+ images_service_pb.ImagesServiceError.BAD_TRANSFORM_DATA)
+ source = sources[options.source_index()]
+ x_anchor = (options.anchor() % 3) * 0.5
+ y_anchor = (options.anchor() / 3) * 0.5
+ x_offset = int(options.x_offset() + x_anchor * (width - source.size[0]))
+ y_offset = int(options.y_offset() + y_anchor * (height - source.size[1]))
+ alpha = options.opacity() * 255
+ mask = Image.new("L", source.size, alpha)
+ canvas.paste(source, (x_offset, y_offset), mask)
+ response_value = self._EncodeImage(canvas, request.canvas().output())
+ response.mutable_image().set_content(response_value)
+
+ def _Dynamic_Histogram(self, request, response):
+ """Trivial implementation of ImagesService::Histogram.
+
+ Based off documentation of the PIL library at
+ http://www.pythonware.com/library/pil/handbook/index.htm
+
+ Args:
+ request: ImagesHistogramRequest, contains the image.
+ response: ImagesHistogramResponse, contains histogram of the image.
+ """
+ image = self._OpenImage(request.image().content())
+ img_format = image.format
+ if img_format not in ("BMP", "GIF", "ICO", "JPEG", "PNG", "TIFF"):
+ raise apiproxy_errors.ApplicationError(
+ images_service_pb.ImagesServiceError.NOT_IMAGE)
+ image = image.convert("RGBA")
+ red = [0] * 256
+ green = [0] * 256
+ blue = [0] * 256
+ for pixel in image.getdata():
+ red[int((pixel[0] * pixel[3]) / 255)] += 1
+ green[int((pixel[1] * pixel[3]) / 255)] += 1
+ blue[int((pixel[2] * pixel[3]) / 255)] += 1
+ histogram = response.mutable_histogram()
+ for value in red:
+ histogram.add_red(value)
+ for value in green:
+ histogram.add_green(value)
+ for value in blue:
+ histogram.add_blue(value)
+
def _Dynamic_Transform(self, request, response):
"""Trivial implementation of ImagesService::Transform.
@@ -58,22 +144,7 @@
request: ImagesTransformRequest, contains image request info.
response: ImagesTransformResponse, contains transformed image.
"""
- image = request.image().content()
- if not image:
- raise apiproxy_errors.ApplicationError(
- images_service_pb.ImagesServiceError.NOT_IMAGE)
-
- image = StringIO.StringIO(image)
- try:
- original_image = Image.open(image)
- except IOError:
- raise apiproxy_errors.ApplicationError(
- images_service_pb.ImagesServiceError.BAD_IMAGE_DATA)
-
- img_format = original_image.format
- if img_format not in ("BMP", "GIF", "ICO", "JPEG", "PNG", "TIFF"):
- raise apiproxy_errors.ApplicationError(
- images_service_pb.ImagesServiceError.NOT_IMAGE)
+ original_image = self._OpenImage(request.image().content())
new_image = self._ProcessTransforms(original_image,
request.transform_list())
@@ -104,6 +175,36 @@
return image_string.getvalue()
+ def _OpenImage(self, image):
+ """Opens an image provided as a string.
+
+ Args:
+ image: image data to be opened
+
+ Raises:
+ apiproxy_errors.ApplicationError if the image cannot be opened or if it
+ is an unsupported format.
+
+ Returns:
+ Image containing the image data passed in.
+ """
+ if not image:
+ raise apiproxy_errors.ApplicationError(
+ images_service_pb.ImagesServiceError.NOT_IMAGE)
+
+ image = StringIO.StringIO(image)
+ try:
+ image = Image.open(image)
+ except IOError:
+ raise apiproxy_errors.ApplicationError(
+ images_service_pb.ImagesServiceError.BAD_IMAGE_DATA)
+
+ img_format = image.format
+ if img_format not in ("BMP", "GIF", "ICO", "JPEG", "PNG", "TIFF"):
+ raise apiproxy_errors.ApplicationError(
+ images_service_pb.ImagesServiceError.NOT_IMAGE)
+ return image
+
def _ValidateCropArg(self, arg):
"""Check an argument for the Crop transform.