author | Sverre Rabbelier <srabbelier@gmail.com> |
Sat, 21 Feb 2009 00:33:59 +0000 | |
changeset 1416 | 6c94a1531ead |
parent 1278 | a7766286a7be |
child 2273 | e4cb9c53db3e |
permissions | -rwxr-xr-x |
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#!/usr/bin/env python |
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# |
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# Copyright 2007 Google Inc. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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# |
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"""Image manipulation API. |
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Classes defined in this module: |
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Image: class used to encapsulate image information and transformations for |
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that image. |
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The current manipulations that are available are resize, rotate, |
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horizontal_flip, vertical_flip, crop and im_feeling_lucky. |
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It should be noted that each transform can only be called once per image |
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per execute_transforms() call. |
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""" |
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import struct |
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from google.appengine.api import apiproxy_stub_map |
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from google.appengine.api.images import images_service_pb |
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from google.appengine.runtime import apiproxy_errors |
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JPEG = images_service_pb.OutputSettings.JPEG |
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PNG = images_service_pb.OutputSettings.PNG |
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OUTPUT_ENCODING_TYPES = frozenset([JPEG, PNG]) |
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MAX_TRANSFORMS_PER_REQUEST = 10 |
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class Error(Exception): |
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"""Base error class for this module.""" |
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class TransformationError(Error): |
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"""Error while attempting to transform the image.""" |
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class BadRequestError(Error): |
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"""The parameters given had something wrong with them.""" |
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class NotImageError(Error): |
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"""The image data given is not recognizable as an image.""" |
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class BadImageError(Error): |
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"""The image data given is corrupt.""" |
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class LargeImageError(Error): |
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"""The image data given is too large to process.""" |
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class Image(object): |
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"""Image object to manipulate.""" |
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def __init__(self, image_data): |
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"""Constructor. |
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Args: |
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image_data: str, image data in string form. |
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Raises: |
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NotImageError if the given data is empty. |
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""" |
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if not image_data: |
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raise NotImageError("Empty image data.") |
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self._image_data = image_data |
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self._transforms = [] |
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self._width = None |
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self._height = None |
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def _check_transform_limits(self): |
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"""Ensure some simple limits on the number of transforms allowed. |
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Raises: |
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BadRequestError if MAX_TRANSFORMS_PER_REQUEST transforms have already been |
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requested for this image |
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""" |
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if len(self._transforms) >= MAX_TRANSFORMS_PER_REQUEST: |
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raise BadRequestError("%d transforms have already been requested on this " |
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"image." % MAX_TRANSFORMS_PER_REQUEST) |
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def _update_dimensions(self): |
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"""Updates the width and height fields of the image. |
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Raises: |
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NotImageError if the image data is not an image. |
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BadImageError if the image data is corrupt. |
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""" |
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size = len(self._image_data) |
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if size >= 6 and self._image_data.startswith("GIF"): |
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|
112 |
self._update_gif_dimensions() |
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|
113 |
elif size >= 8 and self._image_data.startswith("\x89PNG\x0D\x0A\x1A\x0A"): |
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|
114 |
self._update_png_dimensions() |
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|
115 |
elif size >= 2 and self._image_data.startswith("\xff\xD8"): |
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|
116 |
self._update_jpeg_dimensions() |
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|
117 |
elif (size >= 8 and (self._image_data.startswith("II\x2a\x00") or |
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|
118 |
self._image_data.startswith("MM\x00\x2a"))): |
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119 |
self._update_tiff_dimensions() |
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|
120 |
elif size >= 2 and self._image_data.startswith("BM"): |
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121 |
self._update_bmp_dimensions() |
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|
122 |
elif size >= 4 and self._image_data.startswith("\x00\x00\x01\x00"): |
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|
123 |
self._update_ico_dimensions() |
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124 |
else: |
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|
125 |
raise NotImageError("Unrecognized image format") |
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|
126 |
|
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127 |
def _update_gif_dimensions(self): |
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128 |
"""Updates the width and height fields of the gif image. |
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|
129 |
|
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|
130 |
Raises: |
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131 |
BadImageError if the image string is not a valid gif image. |
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132 |
""" |
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133 |
size = len(self._image_data) |
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|
134 |
if size >= 10: |
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|
135 |
self._width, self._height = struct.unpack("<HH", self._image_data[6:10]) |
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|
136 |
else: |
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|
137 |
raise BadImageError("Corrupt GIF format") |
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|
138 |
|
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|
139 |
def _update_png_dimensions(self): |
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|
140 |
"""Updates the width and height fields of the png image. |
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|
141 |
|
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|
142 |
Raises: |
f5fd65cc3bf3
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|
143 |
BadImageError if the image string is not a valid png image. |
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|
144 |
""" |
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|
145 |
size = len(self._image_data) |
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|
146 |
if size >= 24 and self._image_data[12:16] == "IHDR": |
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|
147 |
self._width, self._height = struct.unpack(">II", self._image_data[16:24]) |
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|
148 |
else: |
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|
149 |
raise BadImageError("Corrupt PNG format") |
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|
150 |
|
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|
151 |
def _update_jpeg_dimensions(self): |
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|
152 |
"""Updates the width and height fields of the jpeg image. |
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|
153 |
|
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|
154 |
Raises: |
f5fd65cc3bf3
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|
155 |
BadImageError if the image string is not a valid jpeg image. |
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|
156 |
""" |
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|
157 |
size = len(self._image_data) |
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|
158 |
offset = 2 |
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|
159 |
while offset < size: |
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|
160 |
while offset < size and ord(self._image_data[offset]) != 0xFF: |
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|
161 |
offset += 1 |
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|
162 |
while offset < size and ord(self._image_data[offset]) == 0xFF: |
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|
163 |
offset += 1 |
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|
164 |
if (offset < size and ord(self._image_data[offset]) & 0xF0 == 0xC0 and |
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|
165 |
ord(self._image_data[offset]) != 0xC4): |
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|
166 |
offset += 4 |
1278
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|
167 |
if offset + 4 <= size: |
828
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|
168 |
self._height, self._width = struct.unpack( |
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|
169 |
">HH", |
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|
170 |
self._image_data[offset:offset + 4]) |
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|
171 |
break |
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|
172 |
else: |
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|
173 |
raise BadImageError("Corrupt JPEG format") |
1278
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|
174 |
elif offset + 3 <= size: |
828
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|
175 |
offset += 1 |
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|
176 |
offset += struct.unpack(">H", self._image_data[offset:offset + 2])[0] |
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|
177 |
else: |
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|
178 |
raise BadImageError("Corrupt JPEG format") |
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|
179 |
if self._height is None or self._width is None: |
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|
180 |
raise BadImageError("Corrupt JPEG format") |
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|
181 |
|
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|
182 |
def _update_tiff_dimensions(self): |
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|
183 |
"""Updates the width and height fields of the tiff image. |
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changeset
|
184 |
|
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|
185 |
Raises: |
f5fd65cc3bf3
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|
186 |
BadImageError if the image string is not a valid tiff image. |
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|
187 |
""" |
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|
188 |
size = len(self._image_data) |
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|
189 |
if self._image_data.startswith("II"): |
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|
190 |
endianness = "<" |
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|
191 |
else: |
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|
192 |
endianness = ">" |
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|
193 |
ifd_offset = struct.unpack(endianness + "I", self._image_data[4:8])[0] |
1278
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diff
changeset
|
194 |
if ifd_offset + 14 <= size: |
828
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|
195 |
ifd_size = struct.unpack( |
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|
196 |
endianness + "H", |
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|
197 |
self._image_data[ifd_offset:ifd_offset + 2])[0] |
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|
198 |
ifd_offset += 2 |
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|
199 |
for unused_i in range(0, ifd_size): |
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|
200 |
if ifd_offset + 12 <= size: |
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|
201 |
tag = struct.unpack( |
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|
202 |
endianness + "H", |
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|
203 |
self._image_data[ifd_offset:ifd_offset + 2])[0] |
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|
204 |
if tag == 0x100 or tag == 0x101: |
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|
205 |
value_type = struct.unpack( |
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|
206 |
endianness + "H", |
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|
207 |
self._image_data[ifd_offset + 2:ifd_offset + 4])[0] |
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|
208 |
if value_type == 3: |
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|
209 |
format = endianness + "H" |
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|
210 |
end_offset = ifd_offset + 10 |
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|
211 |
elif value_type == 4: |
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|
212 |
format = endianness + "I" |
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|
213 |
end_offset = ifd_offset + 12 |
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|
214 |
else: |
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|
215 |
format = endianness + "B" |
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|
216 |
end_offset = ifd_offset + 9 |
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|
217 |
if tag == 0x100: |
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|
218 |
self._width = struct.unpack( |
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|
219 |
format, |
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|
220 |
self._image_data[ifd_offset + 8:end_offset])[0] |
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|
221 |
if self._height is not None: |
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|
222 |
break |
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|
223 |
else: |
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|
224 |
self._height = struct.unpack( |
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|
225 |
format, |
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|
226 |
self._image_data[ifd_offset + 8:end_offset])[0] |
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|
227 |
if self._width is not None: |
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228 |
break |
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|
229 |
ifd_offset += 12 |
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|
230 |
else: |
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|
231 |
raise BadImageError("Corrupt TIFF format") |
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|
232 |
if self._width is None or self._height is None: |
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|
233 |
raise BadImageError("Corrupt TIFF format") |
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|
234 |
|
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|
235 |
def _update_bmp_dimensions(self): |
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236 |
"""Updates the width and height fields of the bmp image. |
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|
237 |
|
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|
238 |
Raises: |
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239 |
BadImageError if the image string is not a valid bmp image. |
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|
240 |
""" |
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|
241 |
size = len(self._image_data) |
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242 |
if size >= 18: |
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|
243 |
header_length = struct.unpack("<I", self._image_data[14:18])[0] |
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|
244 |
if ((header_length == 40 or header_length == 108 or |
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|
245 |
header_length == 124 or header_length == 64) and size >= 26): |
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|
246 |
self._width, self._height = struct.unpack("<II", |
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|
247 |
self._image_data[18:26]) |
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|
248 |
elif header_length == 12 and size >= 22: |
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|
249 |
self._width, self._height = struct.unpack("<HH", |
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|
250 |
self._image_data[18:22]) |
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|
251 |
else: |
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|
252 |
raise BadImageError("Corrupt BMP format") |
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|
253 |
else: |
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|
254 |
raise BadImageError("Corrupt BMP format") |
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|
255 |
|
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|
256 |
def _update_ico_dimensions(self): |
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|
257 |
"""Updates the width and height fields of the ico image. |
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|
258 |
|
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|
259 |
Raises: |
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|
260 |
BadImageError if the image string is not a valid ico image. |
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|
261 |
""" |
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|
262 |
size = len(self._image_data) |
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|
263 |
if size >= 8: |
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|
264 |
self._width, self._height = struct.unpack("<BB", self._image_data[6:8]) |
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|
265 |
if not self._width: |
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|
266 |
self._width = 256 |
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|
267 |
if not self._height: |
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|
268 |
self._height = 256 |
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|
269 |
else: |
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|
270 |
raise BadImageError("Corrupt ICO format") |
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|
271 |
|
109
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|
272 |
def resize(self, width=0, height=0): |
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|
273 |
"""Resize the image maintaining the aspect ratio. |
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|
274 |
|
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|
275 |
If both width and height are specified, the more restricting of the two |
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|
276 |
values will be used when resizing the photo. The maximum dimension allowed |
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|
277 |
for both width and height is 4000 pixels. |
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|
278 |
|
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|
279 |
Args: |
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|
280 |
width: int, width (in pixels) to change the image width to. |
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|
281 |
height: int, height (in pixels) to change the image height to. |
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|
282 |
|
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|
283 |
Raises: |
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|
284 |
TypeError when width or height is not either 'int' or 'long' types. |
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|
285 |
BadRequestError when there is something wrong with the given height or |
1278
a7766286a7be
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|
286 |
width or if MAX_TRANSFORMS_PER_REQUEST transforms have already been |
a7766286a7be
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|
287 |
requested on this image. |
109
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|
288 |
""" |
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|
289 |
if (not isinstance(width, (int, long)) or |
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|
290 |
not isinstance(height, (int, long))): |
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|
291 |
raise TypeError("Width and height must be integers.") |
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|
292 |
if width < 0 or height < 0: |
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|
293 |
raise BadRequestError("Width and height must be >= 0.") |
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changeset
|
294 |
|
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|
295 |
if not width and not height: |
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|
296 |
raise BadRequestError("At least one of width or height must be > 0.") |
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|
297 |
|
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|
298 |
if width > 4000 or height > 4000: |
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|
299 |
raise BadRequestError("Both width and height must be < 4000.") |
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|
300 |
|
1278
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|
301 |
self._check_transform_limits() |
109
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|
302 |
|
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|
303 |
transform = images_service_pb.Transform() |
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|
304 |
transform.set_width(width) |
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changeset
|
305 |
transform.set_height(height) |
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|
306 |
|
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|
307 |
self._transforms.append(transform) |
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changeset
|
308 |
|
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Load ../../google_appengine into trunk/thirdparty/google_appengine.
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|
309 |
def rotate(self, degrees): |
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|
310 |
"""Rotate an image a given number of degrees clockwise. |
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|
311 |
|
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|
312 |
Args: |
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|
313 |
degrees: int, must be a multiple of 90. |
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changeset
|
314 |
|
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parents:
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changeset
|
315 |
Raises: |
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parents:
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|
316 |
TypeError when degrees is not either 'int' or 'long' types. |
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|
317 |
BadRequestError when there is something wrong with the given degrees or |
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|
318 |
if MAX_TRANSFORMS_PER_REQUEST transforms have already been requested. |
109
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|
319 |
""" |
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|
320 |
if not isinstance(degrees, (int, long)): |
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parents:
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|
321 |
raise TypeError("Degrees must be integers.") |
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changeset
|
322 |
|
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parents:
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changeset
|
323 |
if degrees % 90 != 0: |
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parents:
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|
324 |
raise BadRequestError("degrees argument must be multiple of 90.") |
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parents:
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changeset
|
325 |
|
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parents:
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|
326 |
degrees = degrees % 360 |
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Load ../../google_appengine into trunk/thirdparty/google_appengine.
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|
327 |
|
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|
328 |
self._check_transform_limits() |
109
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changeset
|
329 |
|
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parents:
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|
330 |
transform = images_service_pb.Transform() |
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parents:
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|
331 |
transform.set_rotate(degrees) |
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changeset
|
332 |
|
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parents:
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changeset
|
333 |
self._transforms.append(transform) |
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parents:
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changeset
|
334 |
|
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parents:
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changeset
|
335 |
def horizontal_flip(self): |
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|
336 |
"""Flip the image horizontally. |
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parents:
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|
337 |
|
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changeset
|
338 |
Raises: |
1278
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changeset
|
339 |
BadRequestError if MAX_TRANSFORMS_PER_REQUEST transforms have already been |
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|
340 |
requested on the image. |
109
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|
341 |
""" |
1278
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|
342 |
self._check_transform_limits() |
109
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changeset
|
343 |
|
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parents:
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|
344 |
transform = images_service_pb.Transform() |
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parents:
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|
345 |
transform.set_horizontal_flip(True) |
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changeset
|
346 |
|
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|
347 |
self._transforms.append(transform) |
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|
348 |
|
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parents:
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changeset
|
349 |
def vertical_flip(self): |
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|
350 |
"""Flip the image vertically. |
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parents:
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changeset
|
351 |
|
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parents:
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changeset
|
352 |
Raises: |
1278
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parents:
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diff
changeset
|
353 |
BadRequestError if MAX_TRANSFORMS_PER_REQUEST transforms have already been |
a7766286a7be
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changeset
|
354 |
requested on the image. |
109
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parents:
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changeset
|
355 |
""" |
1278
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changeset
|
356 |
self._check_transform_limits() |
109
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parents:
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changeset
|
357 |
transform = images_service_pb.Transform() |
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parents:
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|
358 |
transform.set_vertical_flip(True) |
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changeset
|
359 |
|
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parents:
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changeset
|
360 |
self._transforms.append(transform) |
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changeset
|
361 |
|
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parents:
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changeset
|
362 |
def _validate_crop_arg(self, val, val_name): |
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parents:
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|
363 |
"""Validate the given value of a Crop() method argument. |
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parents:
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changeset
|
364 |
|
620f9b141567
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Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
365 |
Args: |
620f9b141567
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parents:
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|
366 |
val: float, value of the argument. |
620f9b141567
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parents:
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changeset
|
367 |
val_name: str, name of the argument. |
620f9b141567
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parents:
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changeset
|
368 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
369 |
Raises: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
370 |
TypeError if the args are not of type 'float'. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
371 |
BadRequestError when there is something wrong with the given bounding box. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
372 |
""" |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
diff
changeset
|
373 |
if type(val) != float: |
620f9b141567
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parents:
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changeset
|
374 |
raise TypeError("arg '%s' must be of type 'float'." % val_name) |
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parents:
diff
changeset
|
375 |
|
620f9b141567
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Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
376 |
if not (0 <= val <= 1.0): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
diff
changeset
|
377 |
raise BadRequestError("arg '%s' must be between 0.0 and 1.0 " |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
diff
changeset
|
378 |
"(inclusive)" % val_name) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
diff
changeset
|
379 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
380 |
def crop(self, left_x, top_y, right_x, bottom_y): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
381 |
"""Crop the image. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
382 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
383 |
The four arguments are the scaling numbers to describe the bounding box |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
384 |
which will crop the image. The upper left point of the bounding box will |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
385 |
be at (left_x*image_width, top_y*image_height) the lower right point will |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
386 |
be at (right_x*image_width, bottom_y*image_height). |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
387 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
388 |
Args: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
389 |
left_x: float value between 0.0 and 1.0 (inclusive). |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
390 |
top_y: float value between 0.0 and 1.0 (inclusive). |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
391 |
right_x: float value between 0.0 and 1.0 (inclusive). |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
392 |
bottom_y: float value between 0.0 and 1.0 (inclusive). |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
393 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
394 |
Raises: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
395 |
TypeError if the args are not of type 'float'. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
396 |
BadRequestError when there is something wrong with the given bounding box |
1278
a7766286a7be
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
828
diff
changeset
|
397 |
or if MAX_TRANSFORMS_PER_REQUEST transforms have already been requested |
a7766286a7be
Load /Users/solydzajs/Downloads/google_appengine into
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parents:
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diff
changeset
|
398 |
for this image. |
109
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
399 |
""" |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
400 |
self._validate_crop_arg(left_x, "left_x") |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
401 |
self._validate_crop_arg(top_y, "top_y") |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
402 |
self._validate_crop_arg(right_x, "right_x") |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
403 |
self._validate_crop_arg(bottom_y, "bottom_y") |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
404 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
405 |
if left_x >= right_x: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
406 |
raise BadRequestError("left_x must be less than right_x") |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
407 |
if top_y >= bottom_y: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
408 |
raise BadRequestError("top_y must be less than bottom_y") |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
409 |
|
1278
a7766286a7be
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
828
diff
changeset
|
410 |
self._check_transform_limits() |
109
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
411 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
412 |
transform = images_service_pb.Transform() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
413 |
transform.set_crop_left_x(left_x) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
414 |
transform.set_crop_top_y(top_y) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
415 |
transform.set_crop_right_x(right_x) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
416 |
transform.set_crop_bottom_y(bottom_y) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
417 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
418 |
self._transforms.append(transform) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
419 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
420 |
def im_feeling_lucky(self): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
421 |
"""Automatically adjust image contrast and color levels. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
422 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
423 |
This is similar to the "I'm Feeling Lucky" button in Picasa. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
424 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
425 |
Raises: |
1278
a7766286a7be
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
828
diff
changeset
|
426 |
BadRequestError if MAX_TRANSFORMS_PER_REQUEST transforms have already |
a7766286a7be
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
828
diff
changeset
|
427 |
been requested for this image. |
109
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
428 |
""" |
1278
a7766286a7be
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
828
diff
changeset
|
429 |
self._check_transform_limits() |
109
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
430 |
transform = images_service_pb.Transform() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
431 |
transform.set_autolevels(True) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
432 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
433 |
self._transforms.append(transform) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
434 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
435 |
def execute_transforms(self, output_encoding=PNG): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
436 |
"""Perform transformations on given image. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
437 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
438 |
Args: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
439 |
output_encoding: A value from OUTPUT_ENCODING_TYPES. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
440 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
441 |
Returns: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
442 |
str, image data after the transformations have been performed on it. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
443 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
444 |
Raises: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
445 |
BadRequestError when there is something wrong with the request |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
446 |
specifications. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
447 |
NotImageError when the image data given is not an image. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
448 |
BadImageError when the image data given is corrupt. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
449 |
LargeImageError when the image data given is too large to process. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
450 |
TransformtionError when something errors during image manipulation. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
451 |
Error when something unknown, but bad, happens. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
452 |
""" |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
453 |
if output_encoding not in OUTPUT_ENCODING_TYPES: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
454 |
raise BadRequestError("Output encoding type not in recognized set " |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
455 |
"%s" % OUTPUT_ENCODING_TYPES) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
456 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
457 |
if not self._transforms: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
458 |
raise BadRequestError("Must specify at least one transformation.") |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
459 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
460 |
request = images_service_pb.ImagesTransformRequest() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
461 |
response = images_service_pb.ImagesTransformResponse() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
462 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
463 |
request.mutable_image().set_content(self._image_data) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
464 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
465 |
for transform in self._transforms: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
466 |
request.add_transform().CopyFrom(transform) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
467 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
468 |
request.mutable_output().set_mime_type(output_encoding) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
469 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
470 |
try: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
471 |
apiproxy_stub_map.MakeSyncCall("images", |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
472 |
"Transform", |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
473 |
request, |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
474 |
response) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
475 |
except apiproxy_errors.ApplicationError, e: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
476 |
if (e.application_error == |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
477 |
images_service_pb.ImagesServiceError.BAD_TRANSFORM_DATA): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
478 |
raise BadRequestError() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
479 |
elif (e.application_error == |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
480 |
images_service_pb.ImagesServiceError.NOT_IMAGE): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
481 |
raise NotImageError() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
482 |
elif (e.application_error == |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
483 |
images_service_pb.ImagesServiceError.BAD_IMAGE_DATA): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
484 |
raise BadImageError() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
485 |
elif (e.application_error == |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
486 |
images_service_pb.ImagesServiceError.IMAGE_TOO_LARGE): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
487 |
raise LargeImageError() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
488 |
elif (e.application_error == |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
489 |
images_service_pb.ImagesServiceError.UNSPECIFIED_ERROR): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
490 |
raise TransformationError() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
491 |
else: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
492 |
raise Error() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
493 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
494 |
self._image_data = response.image().content() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
495 |
self._transforms = [] |
828
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
496 |
self._width = None |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
497 |
self._height = None |
109
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
498 |
return self._image_data |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
499 |
|
828
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
500 |
@property |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
501 |
def width(self): |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
502 |
"""Gets the width of the image.""" |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
503 |
if self._width is None: |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
504 |
self._update_dimensions() |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
505 |
return self._width |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
506 |
|
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
507 |
@property |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
508 |
def height(self): |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
509 |
"""Gets the height of the image.""" |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
510 |
if self._height is None: |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
511 |
self._update_dimensions() |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
512 |
return self._height |
f5fd65cc3bf3
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
109
diff
changeset
|
513 |
|
109
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
514 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
515 |
def resize(image_data, width=0, height=0, output_encoding=PNG): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
516 |
"""Resize a given image file maintaining the aspect ratio. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
517 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
518 |
If both width and height are specified, the more restricting of the two |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
519 |
values will be used when resizing the photo. The maximum dimension allowed |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
520 |
for both width and height is 4000 pixels. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
521 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
522 |
Args: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
523 |
image_data: str, source image data. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
524 |
width: int, width (in pixels) to change the image width to. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
525 |
height: int, height (in pixels) to change the image height to. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
526 |
output_encoding: a value from OUTPUT_ENCODING_TYPES. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
527 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
528 |
Raises: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
529 |
TypeError when width or height not either 'int' or 'long' types. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
530 |
BadRequestError when there is something wrong with the given height or |
1278
a7766286a7be
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
828
diff
changeset
|
531 |
width. |
109
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
532 |
Error when something went wrong with the call. See Image.ExecuteTransforms |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
533 |
for more details. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
534 |
""" |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
535 |
image = Image(image_data) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
536 |
image.resize(width, height) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
537 |
return image.execute_transforms(output_encoding=output_encoding) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
538 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
539 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
540 |
def rotate(image_data, degrees, output_encoding=PNG): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
541 |
"""Rotate a given image a given number of degrees clockwise. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
542 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
543 |
Args: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
544 |
image_data: str, source image data. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
545 |
degrees: value from ROTATE_DEGREE_VALUES. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
546 |
output_encoding: a value from OUTPUT_ENCODING_TYPES. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
547 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
548 |
Raises: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
549 |
TypeError when degrees is not either 'int' or 'long' types. |
1278
a7766286a7be
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
828
diff
changeset
|
550 |
BadRequestError when there is something wrong with the given degrees. |
109
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
551 |
Error when something went wrong with the call. See Image.ExecuteTransforms |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
552 |
for more details. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
553 |
""" |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
554 |
image = Image(image_data) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
555 |
image.rotate(degrees) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
556 |
return image.execute_transforms(output_encoding=output_encoding) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
557 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
558 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
559 |
def horizontal_flip(image_data, output_encoding=PNG): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
560 |
"""Flip the image horizontally. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
561 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
562 |
Args: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
563 |
image_data: str, source image data. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
564 |
output_encoding: a value from OUTPUT_ENCODING_TYPES. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
565 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
566 |
Raises: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
567 |
Error when something went wrong with the call. See Image.ExecuteTransforms |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
568 |
for more details. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
569 |
""" |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
570 |
image = Image(image_data) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
571 |
image.horizontal_flip() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
572 |
return image.execute_transforms(output_encoding=output_encoding) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
573 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
574 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
575 |
def vertical_flip(image_data, output_encoding=PNG): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
576 |
"""Flip the image vertically. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
577 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
578 |
Args: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
579 |
image_data: str, source image data. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
580 |
output_encoding: a value from OUTPUT_ENCODING_TYPES. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
581 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
582 |
Raises: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
583 |
Error when something went wrong with the call. See Image.ExecuteTransforms |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
584 |
for more details. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
585 |
""" |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
586 |
image = Image(image_data) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
587 |
image.vertical_flip() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
588 |
return image.execute_transforms(output_encoding=output_encoding) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
589 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
590 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
591 |
def crop(image_data, left_x, top_y, right_x, bottom_y, output_encoding=PNG): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
592 |
"""Crop the given image. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
593 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
594 |
The four arguments are the scaling numbers to describe the bounding box |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
595 |
which will crop the image. The upper left point of the bounding box will |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
596 |
be at (left_x*image_width, top_y*image_height) the lower right point will |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
597 |
be at (right_x*image_width, bottom_y*image_height). |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
598 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
599 |
Args: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
600 |
image_data: str, source image data. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
601 |
left_x: float value between 0.0 and 1.0 (inclusive). |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
602 |
top_y: float value between 0.0 and 1.0 (inclusive). |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
603 |
right_x: float value between 0.0 and 1.0 (inclusive). |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
604 |
bottom_y: float value between 0.0 and 1.0 (inclusive). |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
605 |
output_encoding: a value from OUTPUT_ENCODING_TYPES. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
606 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
607 |
Raises: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
608 |
TypeError if the args are not of type 'float'. |
1278
a7766286a7be
Load /Users/solydzajs/Downloads/google_appengine into
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
828
diff
changeset
|
609 |
BadRequestError when there is something wrong with the given bounding box. |
109
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
610 |
Error when something went wrong with the call. See Image.ExecuteTransforms |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
611 |
for more details. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
612 |
""" |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
613 |
image = Image(image_data) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
614 |
image.crop(left_x, top_y, right_x, bottom_y) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
615 |
return image.execute_transforms(output_encoding=output_encoding) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
616 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
617 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
618 |
def im_feeling_lucky(image_data, output_encoding=PNG): |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
619 |
"""Automatically adjust image levels. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
620 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
621 |
This is similar to the "I'm Feeling Lucky" button in Picasa. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
622 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
623 |
Args: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
624 |
image_data: str, source image data. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
625 |
output_encoding: a value from OUTPUT_ENCODING_TYPES. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
626 |
|
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
627 |
Raises: |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
628 |
Error when something went wrong with the call. See Image.ExecuteTransforms |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
629 |
for more details. |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
630 |
""" |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
631 |
image = Image(image_data) |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
632 |
image.im_feeling_lucky() |
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
diff
changeset
|
633 |
return image.execute_transforms(output_encoding=output_encoding) |