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Diffstat (limited to 'Lib/test/test_imageop.py')
| -rwxr-xr-x | Lib/test/test_imageop.py | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/Lib/test/test_imageop.py b/Lib/test/test_imageop.py deleted file mode 100755 index d079473..0000000 --- a/Lib/test/test_imageop.py +++ /dev/null @@ -1,177 +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 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) |