def get_image_from_uri(cache, url_fetcher, url, forced_mime_type=None):
"""Get a cairo Pattern from an image URI."""
missing = object()
image = cache.get(url, missing)
if image is not missing:
return image
try:
with fetch(url_fetcher, url) as result:
if 'string' in result:
string = result['string']
else:
string = result['file_obj'].read()
mime_type = forced_mime_type or result['mime_type']
if mime_type == 'image/svg+xml':
# No fallback for XML-based mimetypes as defined by MIME
# Sniffing Standard, see https://mimesniff.spec.whatwg.org/
image = SVGImage(string, url)
else:
# Try to rely on given mimetype
try:
if mime_type == 'image/png':
try:
surface = cairocffi.ImageSurface.create_from_png(
BytesIO(string))
except Exception as exception:
raise ImageLoadingError.from_exception(exception)
else:
image = RasterImage(surface)
else:
image = None
except ImageLoadingError:
image = None
# Relying on mimetype didn't work, give the image to GDK-Pixbuf
if not image:
if pixbuf is None:
raise ImageLoadingError(
'Could not load GDK-Pixbuf. PNG and SVG are '
'the only image formats available.')
try:
image = SVGImage(string, url)
except:
try:
surface, format_name = (
pixbuf.decode_to_image_surface(string))
except pixbuf.ImageLoadingError as exception:
raise ImageLoadingError(str(exception))
if format_name == 'jpeg' and CAIRO_HAS_MIME_DATA:
surface.set_mime_data('image/jpeg', string)
image = RasterImage(surface)
except (URLFetchingError, ImageLoadingError) as exc:
LOGGER.warning('Failed to load image at "%s" (%s)', url, exc)
image = None
cache[url] = image
return image
def get_image_from_uri(cache, url_fetcher, url, forced_mime_type=None):
"""Get a cairo Pattern from an image URI."""
missing = object()
image = cache.get(url, missing)
if image is not missing:
return image
try:
with fetch(url_fetcher, url) as result:
if 'string' in result:
string = result['string']
else:
string = result['file_obj'].read()
mime_type = forced_mime_type or result['mime_type']
if mime_type == 'image/svg+xml':
# No fallback for XML-based mimetypes as defined by MIME
# Sniffing Standard, see https://mimesniff.spec.whatwg.org/
image = SVGImage(string, url)
else:
# Try to rely on given mimetype
try:
if mime_type == 'image/png':
try:
surface = cairocffi.ImageSurface.create_from_png(
BytesIO(string))
except Exception as exception:
raise ImageLoadingError.from_exception(exception)
else:
image = RasterImage(surface)
else:
image = None
except ImageLoadingError:
image = None
# Relying on mimetype didn't work, give the image to GDK-Pixbuf
if not image:
if pixbuf is None:
raise ImageLoadingError(
'Could not load GDK-Pixbuf. PNG and SVG are '
'the only image formats available.')
try:
image = SVGImage(string, url)
except:
try:
surface, format_name = (
pixbuf.decode_to_image_surface(string))
except pixbuf.ImageLoadingError as exception:
raise ImageLoadingError(str(exception))
if format_name == 'jpeg' and CAIRO_HAS_MIME_DATA:
surface.set_mime_data('image/jpeg', string)
image = RasterImage(surface)
except (URLFetchingError, ImageLoadingError) as exc:
LOGGER.warning('Failed to load image at "%s" (%s)', url, exc)
image = None
cache[url] = image
return image
def gdkpixbuf_loader(file_obj, string):
"""Load raster images with GDK-PixBuf."""
if pixbuf is None:
raise OSError(
'Could not load GDK-Pixbuf. '
'PNG and SVG are the only image formats available.')
if string is None:
string = file_obj.read()
surface, format_name = pixbuf.decode_to_image_surface(string)
if format_name == 'jpeg':
surface.set_mime_data('image/jpeg', string)
get_pattern = lambda: cairocffi.SurfacePattern(surface)
return get_pattern, surface.get_width(), surface.get_height()
def get_image_from_uri(cache, url_fetcher, url, forced_mime_type=None):
"""Get a cairo Pattern from an image URI."""
missing = object()
image = cache.get(url, missing)
if image is not missing:
return image
try:
with fetch(url_fetcher, url) as result:
mime_type = forced_mime_type or result['mime_type']
if mime_type == 'image/svg+xml':
string = (result['string'] if 'string' in result
else result['file_obj'].read())
image = SVGImage(string, url)
elif mime_type == 'image/png':
obj = result.get('file_obj') or BytesIO(result.get('string'))
try:
surface = cairocffi.ImageSurface.create_from_png(obj)
except Exception as exc:
raise ImageLoadingError.from_exception(exc)
image = RasterImage(surface)
else:
if pixbuf is None:
raise ImageLoadingError(
'Could not load GDK-Pixbuf. '
'PNG and SVG are the only image formats available.')
string = (result['string'] if 'string' in result
else result['file_obj'].read())
try:
surface, format_name = (
pixbuf.decode_to_image_surface(string))
except pixbuf.ImageLoadingError as exc:
raise ImageLoadingError(str(exc))
if format_name == 'jpeg' and CAIRO_HAS_MIME_DATA:
surface.set_mime_data('image/jpeg', string)
image = RasterImage(surface)
except (URLFetchingError, ImageLoadingError) as exc:
LOGGER.warning('Failed to load image at %s : %s', url, exc)
image = None
cache[url] = image
return image
def get_image_from_uri(cache, url_fetcher, url, forced_mime_type=None):
"""Get a cairo Pattern from an image URI."""
missing = object()
image = cache.get(url, missing)
if image is not missing:
return image
try:
with fetch(url_fetcher, url) as result:
mime_type = forced_mime_type or result['mime_type']
if mime_type == 'image/svg+xml':
string = (result['string'] if 'string' in result
else result['file_obj'].read())
image = SVGImage(string, url)
elif mime_type == 'image/png':
obj = result.get('file_obj') or BytesIO(result.get('string'))
try:
surface = cairocffi.ImageSurface.create_from_png(obj)
except Exception as exc:
raise ImageLoadingError.from_exception(exc)
image = RasterImage(surface)
else:
if pixbuf is None:
raise ImageLoadingError(
'Could not load GDK-Pixbuf. '
'PNG and SVG are the only image formats available.')
string = (result['string'] if 'string' in result
else result['file_obj'].read())
try:
surface, format_name = (
pixbuf.decode_to_image_surface(string))
except pixbuf.ImageLoadingError as exc:
raise ImageLoadingError(str(exc))
if format_name == 'jpeg' and CAIRO_HAS_MIME_DATA:
surface.set_mime_data('image/jpeg', string)
image = RasterImage(surface)
except (URLFetchingError, ImageLoadingError) as exc:
LOGGER.warning('Failed to load image at %s : %s', url, exc)
image = None
cache[url] = image
return image
def get_image_from_uri(cache, url_fetcher, uri, forced_mime_type=None):
"""Get a cairo Pattern from an image URI."""
try:
missing = object()
image = cache.get(uri, missing)
if image is not missing:
return image
result = url_fetcher(uri)
mime_type = forced_mime_type or result['mime_type']
try:
if mime_type == 'image/svg+xml':
image = SVGImage(
result.get('string') or result['file_obj'].read(), uri)
elif mime_type == 'image/png':
image = RasterImage(
cairocffi.ImageSurface.create_from_png(
result.get('file_obj')
or BytesIO(result.get('string'))))
else:
if pixbuf is None:
raise OSError(
'Could not load GDK-Pixbuf. '
'PNG and SVG are the only image formats available.')
string = result.get('string') or result['file_obj'].read()
surface, format_name = pixbuf.decode_to_image_surface(string)
if format_name == 'jpeg':
surface.set_mime_data('image/jpeg', string)
image = RasterImage(surface)
finally:
if 'file_obj' in result:
try:
result['file_obj'].close()
except Exception: # pragma: no cover
# May already be closed or something.
# This is just cleanup anyway.
pass
except Exception as exc:
LOGGER.warn('Error for image at %s : %r', uri, exc)
image = None
cache[uri] = image
return image
def get_image_from_uri(cache, url_fetcher, uri, forced_mime_type=None):
"""Get a cairo Pattern from an image URI."""
try:
missing = object()
image = cache.get(uri, missing)
if image is not missing:
return image
result = url_fetcher(uri)
mime_type = forced_mime_type or result['mime_type']
try:
if mime_type == 'image/svg+xml':
image = SVGImage(
result.get('string') or result['file_obj'].read(), uri)
elif mime_type == 'image/png':
image = RasterImage(cairocffi.ImageSurface.create_from_png(
result.get('file_obj') or BytesIO(result.get('string'))))
else:
if pixbuf is None:
raise OSError(
'Could not load GDK-Pixbuf. '
'PNG and SVG are the only image formats available.')
string = result.get('string') or result['file_obj'].read()
surface, format_name = pixbuf.decode_to_image_surface(string)
if format_name == 'jpeg':
surface.set_mime_data('image/jpeg', string)
image = RasterImage(surface)
finally:
if 'file_obj' in result:
try:
result['file_obj'].close()
except Exception: # pragma: no cover
# May already be closed or something.
# This is just cleanup anyway.
pass
except Exception as exc:
LOGGER.warn('Error for image at %s : %r', uri, exc)
image = None
cache[uri] = image
return image