add hg and python

sys/lib/python/test/test_imageop.py

@@ -0,0 +1,177 @@
+#! /usr/bin/env python
+
+"""Test script for the imageop module.  This has the side
+   effect of partially testing the imgfile module as well.
+   Roger E. Masse
+"""
+
+from test.test_support import verbose, unlink
+
+import imageop, uu, os
+
+import warnings
+warnings.filterwarnings("ignore",
+                        "the rgbimg module is deprecated",
+                        DeprecationWarning,
+                        ".*test_imageop")
+
+def main(use_rgbimg=1):
+
+    # Create binary test files
+    uu.decode(get_qualified_path('testrgb'+os.extsep+'uue'), 'test'+os.extsep+'rgb')
+
+    if use_rgbimg:
+        image, width, height = getrgbimage('test'+os.extsep+'rgb')
+    else:
+        image, width, height = getimage('test'+os.extsep+'rgb')
+
+    # Return the selected part of image, which should by width by height
+    # in size and consist of pixels of psize bytes.
+    if verbose:
+        print 'crop'
+    newimage = imageop.crop (image, 4, width, height, 0, 0, 1, 1)
+
+    # Return image scaled to size newwidth by newheight. No interpolation
+    # is done, scaling is done by simple-minded pixel duplication or removal.
+    # Therefore, computer-generated images or dithered images will
+    # not look nice after scaling.
+    if verbose:
+        print 'scale'
+    scaleimage = imageop.scale(image, 4, width, height, 1, 1)
+
+    # Run a vertical low-pass filter over an image. It does so by computing
+    # each destination pixel as the average of two vertically-aligned source
+    # pixels. The main use of this routine is to forestall excessive flicker
+    # if the image two vertically-aligned source pixels,  hence the name.
+    if verbose:
+        print 'tovideo'
+    videoimage = imageop.tovideo (image, 4, width, height)
+
+    # Convert an rgb image to an 8 bit rgb
+    if verbose:
+        print 'rgb2rgb8'
+    greyimage = imageop.rgb2rgb8(image, width, height)
+
+    # Convert an 8 bit rgb image to a 24 bit rgb image
+    if verbose:
+        print 'rgb82rgb'
+    image = imageop.rgb82rgb(greyimage, width, height)
+
+    # Convert an rgb image to an 8 bit greyscale image
+    if verbose:
+        print 'rgb2grey'
+    greyimage = imageop.rgb2grey(image, width, height)
+
+    # Convert an 8 bit greyscale image to a 24 bit rgb image
+    if verbose:
+        print 'grey2rgb'
+    image = imageop.grey2rgb(greyimage, width, height)
+
+    # Convert a 8-bit deep greyscale image to a 1-bit deep image by
+    # thresholding all the pixels. The resulting image is tightly packed
+    # and is probably only useful as an argument to mono2grey.
+    if verbose:
+        print 'grey2mono'
+    monoimage = imageop.grey2mono (greyimage, width, height, 0)
+
+    # monoimage, width, height = getimage('monotest.rgb')
+    # Convert a 1-bit monochrome image to an 8 bit greyscale or color image.
+    # All pixels that are zero-valued on input get value p0 on output and
+    # all one-value input pixels get value p1 on output. To convert a
+    # monochrome  black-and-white image to greyscale pass the values 0 and
+    # 255 respectively.
+    if verbose:
+        print 'mono2grey'
+    greyimage = imageop.mono2grey (monoimage, width, height, 0, 255)
+
+    # Convert an 8-bit greyscale image to a 1-bit monochrome image using a
+    # (simple-minded) dithering algorithm.
+    if verbose:
+        print 'dither2mono'
+    monoimage = imageop.dither2mono (greyimage, width, height)
+
+    # Convert an 8-bit greyscale image to a 4-bit greyscale image without
+    # dithering.
+    if verbose:
+        print 'grey2grey4'
+    grey4image = imageop.grey2grey4 (greyimage, width, height)
+
+    # Convert an 8-bit greyscale image to a 2-bit greyscale image without
+    # dithering.
+    if verbose:
+        print 'grey2grey2'
+    grey2image = imageop.grey2grey2 (greyimage, width, height)
+
+    # Convert an 8-bit greyscale image to a 2-bit greyscale image with
+    # dithering. As for dither2mono, the dithering algorithm is currently
+    # very simple.
+    if verbose:
+        print 'dither2grey2'
+    grey2image = imageop.dither2grey2 (greyimage, width, height)
+
+    # Convert a 4-bit greyscale image to an 8-bit greyscale image.
+    if verbose:
+        print 'grey42grey'
+    greyimage = imageop.grey42grey (grey4image, width, height)
+
+    # Convert a 2-bit greyscale image to an 8-bit greyscale image.
+    if verbose:
+        print 'grey22grey'
+    image = imageop.grey22grey (grey2image, width, height)
+
+    # Cleanup
+    unlink('test'+os.extsep+'rgb')
+
+def getrgbimage(name):
+    """return a tuple consisting of image (in 'imgfile' format but
+    using rgbimg instead) width and height"""
+
+    import rgbimg
+
+    try:
+        sizes = rgbimg.sizeofimage(name)
+    except rgbimg.error:
+        name = get_qualified_path(name)
+        sizes = rgbimg.sizeofimage(name)
+    if verbose:
+        print 'rgbimg opening test image: %s, sizes: %s' % (name, str(sizes))
+
+    image = rgbimg.longimagedata(name)
+    return (image, sizes[0], sizes[1])
+
+def getimage(name):
+    """return a tuple consisting of
+       image (in 'imgfile' format) width and height
+    """
+
+    import imgfile
+
+    try:
+        sizes = imgfile.getsizes(name)
+    except imgfile.error:
+        name = get_qualified_path(name)
+        sizes = imgfile.getsizes(name)
+    if verbose:
+        print 'imgfile opening test image: %s, sizes: %s' % (name, str(sizes))
+
+    image = imgfile.read(name)
+    return (image, sizes[0], sizes[1])
+
+def get_qualified_path(name):
+    """ return a more qualified path to name"""
+    import sys
+    import os
+    path = sys.path
+    try:
+        path = [os.path.dirname(__file__)] + path
+    except NameError:
+        pass
+    for dir in path:
+        fullname = os.path.join(dir, name)
+        if os.path.exists(fullname):
+            return fullname
+    return name
+
+# rgbimg (unlike imgfile) is portable to platforms other than SGI.
+# So we prefer to use it.
+main(use_rgbimg=1)