mirror of
https://github.com/xtekky/gpt4free.git
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266 lines
8.1 KiB
Python
266 lines
8.1 KiB
Python
from __future__ import annotations
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import re
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from io import BytesIO
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import base64
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from .typing import ImageType, Union, Image
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try:
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from PIL.Image import open as open_image, new as new_image
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from PIL.Image import FLIP_LEFT_RIGHT, ROTATE_180, ROTATE_270, ROTATE_90
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has_requirements = True
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except ImportError:
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has_requirements = False
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from .errors import MissingRequirementsError
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ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif', 'webp', 'svg'}
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def to_image(image: ImageType, is_svg: bool = False) -> Image:
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"""
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Converts the input image to a PIL Image object.
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Args:
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image (Union[str, bytes, Image]): The input image.
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Returns:
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Image: The converted PIL Image object.
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"""
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if not has_requirements:
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raise MissingRequirementsError('Install "pillow" package for images')
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if isinstance(image, str):
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is_data_uri_an_image(image)
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image = extract_data_uri(image)
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if is_svg:
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try:
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import cairosvg
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except ImportError:
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raise MissingRequirementsError('Install "cairosvg" package for svg images')
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if not isinstance(image, bytes):
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image = image.read()
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buffer = BytesIO()
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cairosvg.svg2png(image, write_to=buffer)
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return open_image(buffer)
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if isinstance(image, bytes):
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is_accepted_format(image)
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return open_image(BytesIO(image))
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elif not isinstance(image, Image):
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image = open_image(image)
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image.load()
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return image
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return image
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def is_allowed_extension(filename: str) -> bool:
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"""
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Checks if the given filename has an allowed extension.
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Args:
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filename (str): The filename to check.
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Returns:
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bool: True if the extension is allowed, False otherwise.
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"""
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return '.' in filename and \
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filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
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def is_data_uri_an_image(data_uri: str) -> bool:
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"""
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Checks if the given data URI represents an image.
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Args:
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data_uri (str): The data URI to check.
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Raises:
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ValueError: If the data URI is invalid or the image format is not allowed.
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"""
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# Check if the data URI starts with 'data:image' and contains an image format (e.g., jpeg, png, gif)
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if not re.match(r'data:image/(\w+);base64,', data_uri):
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raise ValueError("Invalid data URI image.")
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# Extract the image format from the data URI
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image_format = re.match(r'data:image/(\w+);base64,', data_uri).group(1).lower()
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# Check if the image format is one of the allowed formats (jpg, jpeg, png, gif)
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if image_format not in ALLOWED_EXTENSIONS and image_format != "svg+xml":
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raise ValueError("Invalid image format (from mime file type).")
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def is_accepted_format(binary_data: bytes) -> bool:
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"""
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Checks if the given binary data represents an image with an accepted format.
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Args:
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binary_data (bytes): The binary data to check.
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Raises:
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ValueError: If the image format is not allowed.
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"""
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if binary_data.startswith(b'\xFF\xD8\xFF'):
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return "image/jpeg"
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elif binary_data.startswith(b'\x89PNG\r\n\x1a\n'):
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return "image/png"
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elif binary_data.startswith(b'GIF87a') or binary_data.startswith(b'GIF89a'):
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return "image/gif"
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elif binary_data.startswith(b'\x89JFIF') or binary_data.startswith(b'JFIF\x00'):
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return "image/jpeg"
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elif binary_data.startswith(b'\xFF\xD8'):
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return "image/jpeg"
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elif binary_data.startswith(b'RIFF') and binary_data[8:12] == b'WEBP':
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return "image/webp"
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else:
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raise ValueError("Invalid image format (from magic code).")
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def extract_data_uri(data_uri: str) -> bytes:
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"""
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Extracts the binary data from the given data URI.
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Args:
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data_uri (str): The data URI.
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Returns:
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bytes: The extracted binary data.
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"""
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data = data_uri.split(",")[1]
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data = base64.b64decode(data)
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return data
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def get_orientation(image: Image) -> int:
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"""
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Gets the orientation of the given image.
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Args:
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image (Image): The image.
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Returns:
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int: The orientation value.
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"""
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exif_data = image.getexif() if hasattr(image, 'getexif') else image._getexif()
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if exif_data is not None:
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orientation = exif_data.get(274) # 274 corresponds to the orientation tag in EXIF
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if orientation is not None:
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return orientation
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def process_image(image: Image, new_width: int, new_height: int) -> Image:
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"""
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Processes the given image by adjusting its orientation and resizing it.
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Args:
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image (Image): The image to process.
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new_width (int): The new width of the image.
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new_height (int): The new height of the image.
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Returns:
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Image: The processed image.
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"""
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# Fix orientation
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orientation = get_orientation(image)
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if orientation:
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if orientation > 4:
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image = image.transpose(FLIP_LEFT_RIGHT)
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if orientation in [3, 4]:
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image = image.transpose(ROTATE_180)
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if orientation in [5, 6]:
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image = image.transpose(ROTATE_270)
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if orientation in [7, 8]:
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image = image.transpose(ROTATE_90)
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# Resize image
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image.thumbnail((new_width, new_height))
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# Remove transparency
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if image.mode == "RGBA":
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image.load()
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white = new_image('RGB', image.size, (255, 255, 255))
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white.paste(image, mask=image.split()[-1])
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return white
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elif image.mode != "RGB":
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image = image.convert("RGB")
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return image
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def to_base64_jpg(image: Image, compression_rate: float) -> str:
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"""
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Converts the given image to a base64-encoded string.
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Args:
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image (Image.Image): The image to convert.
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compression_rate (float): The compression rate (0.0 to 1.0).
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Returns:
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str: The base64-encoded image.
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"""
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output_buffer = BytesIO()
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image.save(output_buffer, format="JPEG", quality=int(compression_rate * 100))
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return base64.b64encode(output_buffer.getvalue()).decode()
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def format_images_markdown(images: Union[str, list], alt: str, preview: Union[str, list] = None) -> str:
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"""
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Formats the given images as a markdown string.
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Args:
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images: The images to format.
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alt (str): The alt for the images.
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preview (str, optional): The preview URL format. Defaults to "{image}?w=200&h=200".
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Returns:
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str: The formatted markdown string.
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"""
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if isinstance(images, str):
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result = f"[ if preview else images})]({images})"
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else:
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if not isinstance(preview, list):
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preview = [preview.replace('{image}', image) if preview else image for image in images]
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result = "\n".join(
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f"[]({image})" for idx, image in enumerate(images)
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)
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start_flag = "<!-- generated images start -->\n"
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end_flag = "<!-- generated images end -->\n"
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return f"\n{start_flag}{result}\n{end_flag}\n"
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def to_bytes(image: ImageType) -> bytes:
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"""
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Converts the given image to bytes.
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Args:
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image (ImageType): The image to convert.
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Returns:
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bytes: The image as bytes.
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"""
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if isinstance(image, bytes):
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return image
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elif isinstance(image, str):
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is_data_uri_an_image(image)
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return extract_data_uri(image)
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elif isinstance(image, Image):
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bytes_io = BytesIO()
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image.save(bytes_io, image.format)
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image.seek(0)
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return bytes_io.getvalue()
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else:
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return image.read()
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class ImageResponse:
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def __init__(
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self,
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images: Union[str, list],
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alt: str,
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options: dict = {}
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):
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self.images = images
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self.alt = alt
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self.options = options
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def __str__(self) -> str:
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return format_images_markdown(self.images, self.alt, self.get("preview"))
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def get(self, key: str):
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return self.options.get(key)
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class ImageRequest:
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def __init__(
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self,
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options: dict = {}
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):
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self.options = options
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def get(self, key: str):
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return self.options.get(key) |