Add Qt5 support.

PIL/ImageQt5.py

@@ -0,0 +1,85 @@
+#
+# 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
+#
+# Copyright (c) 2006 by Secret Labs AB
+# Copyright (c) 2006 by Fredrik Lundh
+#
+# See the README file for information on usage and redistribution.
+#
+
+from PIL import Image
+from PIL._util import isPath
+
+from PyQt5.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 PyQt5'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 isPath(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.tobytes("raw", "BGRX")
+            format = QImage.Format_RGB32
+        elif im.mode == "RGBA":
+            try:
+                data = im.tobytes("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.tobytes()
+
+        QImage.__init__(self, self.__data, im.size[0], im.size[1], format)
+
+        if colortable:
+            self.setColorTable(colortable)