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Diffstat (limited to 'PIL/ImageQt.py')
-rw-r--r-- | PIL/ImageQt.py | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/PIL/ImageQt.py b/PIL/ImageQt.py new file mode 100644 index 0000000..2e9f476 --- /dev/null +++ b/PIL/ImageQt.py @@ -0,0 +1,84 @@ +# +# The Python Imaging Library. +# $Id: ImageQt.py 2741 2006-06-18 16:17:20Z fredrik $ +# +# 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 +# +# Copyright (c) 2006 by Secret Labs AB +# Copyright (c) 2006 by Fredrik Lundh +# +# See the README file for information on usage and redistribution. +# + +import Image + +from PyQt4.QtGui import QImage, qRgb + +## +# (Internal) Turns an RGB color into a Qt compatible color integer. + +def rgb(r, g, b): + # use qRgb to pack the colors, and then turn the resulting long + # into a negative integer with the same bitpattern. + return (qRgb(r, g, b) & 0xffffff) - 0x1000000 + +## +# An PIL image wrapper for Qt. This is a subclass of PyQt4's QImage +# class. +# +# @param im A PIL Image object, or a file name (given either as Python +# string or a PyQt string object). + +class ImageQt(QImage): + + def __init__(self, im): + + data = None + colortable = None + + # handle filename, if given instead of image name + if hasattr(im, "toUtf8"): + # FIXME - is this really the best way to do this? + im = unicode(im.toUtf8(), "utf-8") + if Image.isStringType(im): + im = Image.open(im) + + if im.mode == "1": + format = QImage.Format_Mono + elif im.mode == "L": + format = QImage.Format_Indexed8 + colortable = [] + for i in range(256): + colortable.append(rgb(i, i, i)) + elif im.mode == "P": + format = QImage.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": + data = im.tostring("raw", "BGRX") + format = QImage.Format_RGB32 + elif im.mode == "RGBA": + try: + data = im.tostring("raw", "BGRA") + except SystemError: + # workaround for earlier versions + r, g, b, a = im.split() + im = Image.merge("RGBA", (b, g, r, a)) + format = QImage.Format_ARGB32 + else: + raise ValueError("unsupported image mode %r" % im.mode) + + # must keep a reference, or Qt will crash! + self.__data = data or im.tostring() + + QImage.__init__(self, self.__data, im.size[0], im.size[1], format) + + if colortable: + self.setColorTable(colortable) |