shutiaozhao127-boop
cfdeeb5e41
添加后端API和前端项目的初始目录结构，包括应用层模块、工具模块和模型定义 配置前后端的.dockerignore文件以排除开发环境文件 添加前端样式文件，包括字体、Tailwind CSS和主题配置 初始化Python虚拟环境中的类型标记文件
137 lines
3.8 KiB
Python
137 lines
3.8 KiB
Python
#
|
|
# The Python Imaging Library.
|
|
# $Id$
|
|
#
|
|
# transform wrappers
|
|
#
|
|
# History:
|
|
# 2002-04-08 fl Created
|
|
#
|
|
# Copyright (c) 2002 by Secret Labs AB
|
|
# Copyright (c) 2002 by Fredrik Lundh
|
|
#
|
|
# See the README file for information on usage and redistribution.
|
|
#
|
|
from __future__ import annotations
|
|
|
|
from collections.abc import Sequence
|
|
from typing import Any
|
|
|
|
from . import Image
|
|
|
|
|
|
class Transform(Image.ImageTransformHandler):
|
|
"""Base class for other transforms defined in :py:mod:`~PIL.ImageTransform`."""
|
|
|
|
method: Image.Transform
|
|
|
|
def __init__(self, data: Sequence[Any]) -> None:
|
|
self.data = data
|
|
|
|
def getdata(self) -> tuple[Image.Transform, Sequence[int]]:
|
|
return self.method, self.data
|
|
|
|
def transform(
|
|
self,
|
|
size: tuple[int, int],
|
|
image: Image.Image,
|
|
**options: Any,
|
|
) -> Image.Image:
|
|
"""Perform the transform. Called from :py:meth:`.Image.transform`."""
|
|
# can be overridden
|
|
method, data = self.getdata()
|
|
return image.transform(size, method, data, **options)
|
|
|
|
|
|
class AffineTransform(Transform):
|
|
"""
|
|
Define an affine image transform.
|
|
|
|
This function takes a 6-tuple (a, b, c, d, e, f) which contain the first
|
|
two rows from an affine transform matrix. For each pixel (x, y) in the
|
|
output image, the new value is taken from a position (a x + b y + c,
|
|
d x + e y + f) in the input image, rounded to nearest pixel.
|
|
|
|
This function can be used to scale, translate, rotate, and shear the
|
|
original image.
|
|
|
|
See :py:meth:`.Image.transform`
|
|
|
|
:param matrix: A 6-tuple (a, b, c, d, e, f) containing the first two rows
|
|
from an affine transform matrix.
|
|
"""
|
|
|
|
method = Image.Transform.AFFINE
|
|
|
|
|
|
class PerspectiveTransform(Transform):
|
|
"""
|
|
Define a perspective image transform.
|
|
|
|
This function takes an 8-tuple (a, b, c, d, e, f, g, h). For each pixel
|
|
(x, y) in the output image, the new value is taken from a position
|
|
((a x + b y + c) / (g x + h y + 1), (d x + e y + f) / (g x + h y + 1)) in
|
|
the input image, rounded to nearest pixel.
|
|
|
|
This function can be used to scale, translate, rotate, and shear the
|
|
original image.
|
|
|
|
See :py:meth:`.Image.transform`
|
|
|
|
:param matrix: An 8-tuple (a, b, c, d, e, f, g, h).
|
|
"""
|
|
|
|
method = Image.Transform.PERSPECTIVE
|
|
|
|
|
|
class ExtentTransform(Transform):
|
|
"""
|
|
Define a transform to extract a subregion from an image.
|
|
|
|
Maps a rectangle (defined by two corners) from the image to a rectangle of
|
|
the given size. The resulting image will contain data sampled from between
|
|
the corners, such that (x0, y0) in the input image will end up at (0,0) in
|
|
the output image, and (x1, y1) at size.
|
|
|
|
This method can be used to crop, stretch, shrink, or mirror an arbitrary
|
|
rectangle in the current image. It is slightly slower than crop, but about
|
|
as fast as a corresponding resize operation.
|
|
|
|
See :py:meth:`.Image.transform`
|
|
|
|
:param bbox: A 4-tuple (x0, y0, x1, y1) which specifies two points in the
|
|
input image's coordinate system. See :ref:`coordinate-system`.
|
|
"""
|
|
|
|
method = Image.Transform.EXTENT
|
|
|
|
|
|
class QuadTransform(Transform):
|
|
"""
|
|
Define a quad image transform.
|
|
|
|
Maps a quadrilateral (a region defined by four corners) from the image to a
|
|
rectangle of the given size.
|
|
|
|
See :py:meth:`.Image.transform`
|
|
|
|
:param xy: An 8-tuple (x0, y0, x1, y1, x2, y2, x3, y3) which contain the
|
|
upper left, lower left, lower right, and upper right corner of the
|
|
source quadrilateral.
|
|
"""
|
|
|
|
method = Image.Transform.QUAD
|
|
|
|
|
|
class MeshTransform(Transform):
|
|
"""
|
|
Define a mesh image transform. A mesh transform consists of one or more
|
|
individual quad transforms.
|
|
|
|
See :py:meth:`.Image.transform`
|
|
|
|
:param data: A list of (bbox, quad) tuples.
|
|
"""
|
|
|
|
method = Image.Transform.MESH
|