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Diffstat (limited to 'lib/python2.7/test/test_imageop.py')
| -rwxr-xr-x | lib/python2.7/test/test_imageop.py | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/lib/python2.7/test/test_imageop.py b/lib/python2.7/test/test_imageop.py deleted file mode 100755 index 56320fb..0000000 --- a/lib/python2.7/test/test_imageop.py +++ /dev/null @@ -1,211 +0,0 @@ -#! /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_module, run_unittest - -imageop = import_module('imageop', deprecated=True) -import uu, os, unittest - - -SIZES = (1, 2, 3, 4) -_VALUES = (1, 2, 2**10, 2**15-1, 2**15, 2**15+1, 2**31-2, 2**31-1) -VALUES = tuple( -x for x in reversed(_VALUES) ) + (0,) + _VALUES -AAAAA = "A" * 1024 -MAX_LEN = 2**20 - - -class InputValidationTests(unittest.TestCase): - - def _check(self, name, size=None, *extra): - func = getattr(imageop, name) - for height in VALUES: - for width in VALUES: - strlen = abs(width * height) - if size: - strlen *= size - if strlen < MAX_LEN: - data = "A" * strlen - else: - data = AAAAA - if size: - arguments = (data, size, width, height) + extra - else: - arguments = (data, width, height) + extra - try: - func(*arguments) - except (ValueError, imageop.error): - pass - - def check_size(self, name, *extra): - for size in SIZES: - self._check(name, size, *extra) - - def check(self, name, *extra): - self._check(name, None, *extra) - - def test_input_validation(self): - self.check_size("crop", 0, 0, 0, 0) - self.check_size("scale", 1, 0) - self.check_size("scale", -1, -1) - self.check_size("tovideo") - self.check("grey2mono", 128) - self.check("grey2grey4") - self.check("grey2grey2") - self.check("dither2mono") - self.check("dither2grey2") - self.check("mono2grey", 0, 0) - self.check("grey22grey") - self.check("rgb2rgb8") # nlen*4 == len - self.check("rgb82rgb") - self.check("rgb2grey") - self.check("grey2rgb") - - -def test_main(): - - run_unittest(InputValidationTests) - - try: - import imgfile - except ImportError: - return - - # Create binary test files - uu.decode(get_qualified_path('testrgb'+os.extsep+'uue'), 'test'+os.extsep+'rgb') - - 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 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 - -if __name__ == '__main__': - test_main() |