diff options
Diffstat (limited to 'venv/lib/python3.9/site-packages/PIL/ImageQt.py')
-rw-r--r-- | venv/lib/python3.9/site-packages/PIL/ImageQt.py | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/venv/lib/python3.9/site-packages/PIL/ImageQt.py b/venv/lib/python3.9/site-packages/PIL/ImageQt.py new file mode 100644 index 00000000..ad607a97 --- /dev/null +++ b/venv/lib/python3.9/site-packages/PIL/ImageQt.py @@ -0,0 +1,229 @@ +# +# The Python Imaging Library. +# $Id$ +# +# a simple Qt image interface. +# +# history: +# 2006-06-03 fl: created +# 2006-06-04 fl: inherit from QImage instead of wrapping it +# 2006-06-05 fl: removed toimage helper; move string support to ImageQt +# 2013-11-13 fl: add support for Qt5 (aurelien.ballier@cyclonit.com) +# +# Copyright (c) 2006 by Secret Labs AB +# Copyright (c) 2006 by Fredrik Lundh +# +# See the README file for information on usage and redistribution. +# + +import sys +from io import BytesIO + +from . import Image +from ._deprecate import deprecate +from ._util import is_path + +qt_versions = [ + ["6", "PyQt6"], + ["side6", "PySide6"], + ["5", "PyQt5"], + ["side2", "PySide2"], +] + +# If a version has already been imported, attempt it first +qt_versions.sort(key=lambda qt_version: qt_version[1] in sys.modules, reverse=True) +for qt_version, qt_module in qt_versions: + try: + if qt_module == "PyQt6": + from PyQt6.QtCore import QBuffer, QIODevice + from PyQt6.QtGui import QImage, QPixmap, qRgba + elif qt_module == "PySide6": + from PySide6.QtCore import QBuffer, QIODevice + from PySide6.QtGui import QImage, QPixmap, qRgba + elif qt_module == "PyQt5": + from PyQt5.QtCore import QBuffer, QIODevice + from PyQt5.QtGui import QImage, QPixmap, qRgba + + deprecate("Support for PyQt5", 10, "PyQt6 or PySide6") + elif qt_module == "PySide2": + from PySide2.QtCore import QBuffer, QIODevice + from PySide2.QtGui import QImage, QPixmap, qRgba + + deprecate("Support for PySide2", 10, "PyQt6 or PySide6") + except (ImportError, RuntimeError): + continue + qt_is_installed = True + break +else: + qt_is_installed = False + qt_version = None + + +def rgb(r, g, b, a=255): + """(Internal) Turns an RGB color into a Qt compatible color integer.""" + # use qRgb to pack the colors, and then turn the resulting long + # into a negative integer with the same bitpattern. + return qRgba(r, g, b, a) & 0xFFFFFFFF + + +def fromqimage(im): + """ + :param im: QImage or PIL ImageQt object + """ + buffer = QBuffer() + if qt_version == "6": + try: + qt_openmode = QIODevice.OpenModeFlag + except AttributeError: + qt_openmode = QIODevice.OpenMode + else: + qt_openmode = QIODevice + buffer.open(qt_openmode.ReadWrite) + # preserve alpha channel with png + # otherwise ppm is more friendly with Image.open + if im.hasAlphaChannel(): + im.save(buffer, "png") + else: + im.save(buffer, "ppm") + + b = BytesIO() + b.write(buffer.data()) + buffer.close() + b.seek(0) + + return Image.open(b) + + +def fromqpixmap(im): + return fromqimage(im) + # buffer = QBuffer() + # buffer.open(QIODevice.ReadWrite) + # # im.save(buffer) + # # What if png doesn't support some image features like animation? + # im.save(buffer, 'ppm') + # bytes_io = BytesIO() + # bytes_io.write(buffer.data()) + # buffer.close() + # bytes_io.seek(0) + # return Image.open(bytes_io) + + +def align8to32(bytes, width, mode): + """ + converts each scanline of data from 8 bit to 32 bit aligned + """ + + bits_per_pixel = {"1": 1, "L": 8, "P": 8, "I;16": 16}[mode] + + # calculate bytes per line and the extra padding if needed + bits_per_line = bits_per_pixel * width + full_bytes_per_line, remaining_bits_per_line = divmod(bits_per_line, 8) + bytes_per_line = full_bytes_per_line + (1 if remaining_bits_per_line else 0) + + extra_padding = -bytes_per_line % 4 + + # already 32 bit aligned by luck + if not extra_padding: + return bytes + + new_data = [] + for i in range(len(bytes) // bytes_per_line): + new_data.append( + bytes[i * bytes_per_line : (i + 1) * bytes_per_line] + + b"\x00" * extra_padding + ) + + return b"".join(new_data) + + +def _toqclass_helper(im): + data = None + colortable = None + exclusive_fp = False + + # handle filename, if given instead of image name + if hasattr(im, "toUtf8"): + # FIXME - is this really the best way to do this? + im = str(im.toUtf8(), "utf-8") + if is_path(im): + im = Image.open(im) + exclusive_fp = True + + qt_format = QImage.Format if qt_version == "6" else QImage + if im.mode == "1": + format = qt_format.Format_Mono + elif im.mode == "L": + format = qt_format.Format_Indexed8 + colortable = [] + for i in range(256): + colortable.append(rgb(i, i, i)) + elif im.mode == "P": + format = qt_format.Format_Indexed8 + colortable = [] + palette = im.getpalette() + for i in range(0, len(palette), 3): + colortable.append(rgb(*palette[i : i + 3])) + elif im.mode == "RGB": + # Populate the 4th channel with 255 + im = im.convert("RGBA") + + data = im.tobytes("raw", "BGRA") + format = qt_format.Format_RGB32 + elif im.mode == "RGBA": + data = im.tobytes("raw", "BGRA") + format = qt_format.Format_ARGB32 + elif im.mode == "I;16" and hasattr(qt_format, "Format_Grayscale16"): # Qt 5.13+ + im = im.point(lambda i: i * 256) + + format = qt_format.Format_Grayscale16 + else: + if exclusive_fp: + im.close() + msg = f"unsupported image mode {repr(im.mode)}" + raise ValueError(msg) + + size = im.size + __data = data or align8to32(im.tobytes(), size[0], im.mode) + if exclusive_fp: + im.close() + return {"data": __data, "size": size, "format": format, "colortable": colortable} + + +if qt_is_installed: + + class ImageQt(QImage): + def __init__(self, im): + """ + An PIL image wrapper for Qt. This is a subclass of PyQt's QImage + class. + + :param im: A PIL Image object, or a file name (given either as + Python string or a PyQt string object). + """ + im_data = _toqclass_helper(im) + # must keep a reference, or Qt will crash! + # All QImage constructors that take data operate on an existing + # buffer, so this buffer has to hang on for the life of the image. + # Fixes https://github.com/python-pillow/Pillow/issues/1370 + self.__data = im_data["data"] + super().__init__( + self.__data, + im_data["size"][0], + im_data["size"][1], + im_data["format"], + ) + if im_data["colortable"]: + self.setColorTable(im_data["colortable"]) + + +def toqimage(im): + return ImageQt(im) + + +def toqpixmap(im): + # # This doesn't work. For now using a dumb approach. + # im_data = _toqclass_helper(im) + # result = QPixmap(im_data["size"][0], im_data["size"][1]) + # result.loadFromData(im_data["data"]) + qimage = toqimage(im) + return QPixmap.fromImage(qimage) |