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authorH Lohaus <hlohaus@users.noreply.github.com>2024-01-13 15:48:38 +0100
committerGitHub <noreply@github.com>2024-01-13 15:48:38 +0100
commit467f2a6fc67e6c5a6cf996da961dc1f68bd7d456 (patch)
tree70d06c98503a235d8e6727a9ea4537fea4330f8c /g4f/image.py
parent~ (diff)
parentSupport upload image in gui (diff)
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-rw-r--r--g4f/image.py116
1 files changed, 116 insertions, 0 deletions
diff --git a/g4f/image.py b/g4f/image.py
new file mode 100644
index 00000000..4a97247e
--- /dev/null
+++ b/g4f/image.py
@@ -0,0 +1,116 @@
+import re
+from io import BytesIO
+import base64
+from .typing import ImageType, Union
+from PIL import Image
+
+ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif'}
+
+def to_image(image: ImageType) -> Image.Image:
+ if isinstance(image, str):
+ is_data_uri_an_image(image)
+ image = extract_data_uri(image)
+ if isinstance(image, bytes):
+ is_accepted_format(image)
+ image = Image.open(BytesIO(image))
+ elif not isinstance(image, Image.Image):
+ image = Image.open(image)
+ copy = image.copy()
+ copy.format = image.format
+ image = copy
+ return image
+
+def is_allowed_extension(filename) -> bool:
+ return '.' in filename and \
+ filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
+
+def is_data_uri_an_image(data_uri: str) -> bool:
+ # Check if the data URI starts with 'data:image' and contains an image format (e.g., jpeg, png, gif)
+ if not re.match(r'data:image/(\w+);base64,', data_uri):
+ raise ValueError("Invalid data URI image.")
+ # Extract the image format from the data URI
+ image_format = re.match(r'data:image/(\w+);base64,', data_uri).group(1)
+ # Check if the image format is one of the allowed formats (jpg, jpeg, png, gif)
+ if image_format.lower() not in ALLOWED_EXTENSIONS:
+ raise ValueError("Invalid image format (from mime file type).")
+
+def is_accepted_format(binary_data: bytes) -> bool:
+ if binary_data.startswith(b'\xFF\xD8\xFF'):
+ pass # It's a JPEG image
+ elif binary_data.startswith(b'\x89PNG\r\n\x1a\n'):
+ pass # It's a PNG image
+ elif binary_data.startswith(b'GIF87a') or binary_data.startswith(b'GIF89a'):
+ pass # It's a GIF image
+ elif binary_data.startswith(b'\x89JFIF') or binary_data.startswith(b'JFIF\x00'):
+ pass # It's a JPEG image
+ elif binary_data.startswith(b'\xFF\xD8'):
+ pass # It's a JPEG image
+ elif binary_data.startswith(b'RIFF') and binary_data[8:12] == b'WEBP':
+ pass # It's a WebP image
+ else:
+ raise ValueError("Invalid image format (from magic code).")
+
+def extract_data_uri(data_uri: str) -> bytes:
+ data = data_uri.split(",")[1]
+ data = base64.b64decode(data)
+ return data
+
+def get_orientation(image: Image.Image) -> int:
+ exif_data = image.getexif() if hasattr(image, 'getexif') else image._getexif()
+ if exif_data is not None:
+ orientation = exif_data.get(274) # 274 corresponds to the orientation tag in EXIF
+ if orientation is not None:
+ return orientation
+
+def process_image(img: Image.Image, new_width: int, new_height: int) -> Image.Image:
+ orientation = get_orientation(img)
+ new_img = Image.new("RGB", (new_width, new_height), color="#FFFFFF")
+ if orientation:
+ if orientation > 4:
+ img = img.transpose(Image.FLIP_LEFT_RIGHT)
+ if orientation in [3, 4]:
+ img = img.transpose(Image.ROTATE_180)
+ if orientation in [5, 6]:
+ img = img.transpose(Image.ROTATE_270)
+ if orientation in [7, 8]:
+ img = img.transpose(Image.ROTATE_90)
+ new_img.paste(img, (0, 0))
+ return new_img
+
+def to_base64(image: Image.Image, compression_rate: float) -> str:
+ output_buffer = BytesIO()
+ image.save(output_buffer, format="JPEG", quality=int(compression_rate * 100))
+ return base64.b64encode(output_buffer.getvalue()).decode()
+
+def format_images_markdown(images, prompt: str, preview: str="{image}?w=200&h=200") -> str:
+ if isinstance(images, list):
+ images = [f"[![#{idx+1} {prompt}]({preview.replace('{image}', image)})]({image})" for idx, image in enumerate(images)]
+ images = "\n".join(images)
+ else:
+ images = f"[![{prompt}]({images})]({images})"
+ start_flag = "<!-- generated images start -->\n"
+ end_flag = "<!-- generated images end -->\n"
+ return f"\n{start_flag}{images}\n{end_flag}\n"
+
+def to_bytes(image: Image.Image) -> bytes:
+ bytes_io = BytesIO()
+ image.save(bytes_io, image.format)
+ image.seek(0)
+ return bytes_io.getvalue()
+
+class ImageResponse():
+ def __init__(
+ self,
+ images: Union[str, list],
+ alt: str,
+ options: dict = {}
+ ):
+ self.images = images
+ self.alt = alt
+ self.options = options
+
+ def __str__(self) -> str:
+ return format_images_markdown(self.images, self.alt)
+
+ def get(self, key: str):
+ return self.options.get(key) \ No newline at end of file