217 lines
6.2 KiB
Python
217 lines
6.2 KiB
Python
#
|
|
# 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 ._util import is_path
|
|
|
|
qt_versions = [
|
|
["6", "PyQt6"],
|
|
["side6", "PySide6"],
|
|
]
|
|
|
|
# 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
|
|
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)
|