diff options
Diffstat (limited to 'Lib/dos-8x3/test_img.py')
-rw-r--r-- | Lib/dos-8x3/test_img.py | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/Lib/dos-8x3/test_img.py b/Lib/dos-8x3/test_img.py deleted file mode 100644 index b074320..0000000 --- a/Lib/dos-8x3/test_img.py +++ /dev/null @@ -1,117 +0,0 @@ -#! /usr/bin/env python - -"""Simple test script for imgfile.c - Roger E. Masse -""" - -from test_support import verbose, unlink, findfile - -import imgfile, uu, os - - -def main(): - - uu.decode(findfile('testrgb.uue'), 'test.rgb') - uu.decode(findfile('greyrgb.uue'), 'greytest.rgb') - - # Test a 3 byte color image - testimage('test.rgb') - - # Test a 1 byte greyscale image - testimage('greytest.rgb') - - unlink('test.rgb') - unlink('greytest.rgb') - -def testimage(name): - """Run through the imgfile's battery of possible methods - on the image passed in name. - """ - - import sys - import os - import string - - outputfile = '/tmp/deleteme' - - # try opening the name directly - try: - # This function returns a tuple (x, y, z) where x and y are the size - # of the image in pixels and z is the number of bytes per pixel. Only - # 3 byte RGB pixels and 1 byte greyscale pixels are supported. - sizes = imgfile.getsizes(name) - except imgfile.error: - # get a more qualified path component of the script... - if __name__ == '__main__': - ourname = sys.argv[0] - else: # ...or the full path of the module - ourname = sys.modules[__name__].__file__ - - parts = string.splitfields(ourname, os.sep) - parts[-1] = name - name = string.joinfields(parts, os.sep) - sizes = imgfile.getsizes(name) - if verbose: - print 'Opening test image: %s, sizes: %s' % (name, str(sizes)) - # This function reads and decodes the image on the specified file, - # and returns it as a python string. The string has either 1 byte - # greyscale pixels or 4 byte RGBA pixels. The bottom left pixel - # is the first in the string. This format is suitable to pass - # to gl.lrectwrite, for instance. - image = imgfile.read(name) - - # This function writes the RGB or greyscale data in data to - # image file file. x and y give the size of the image, z is - # 1 for 1 byte greyscale images or 3 for RGB images (which - # are stored as 4 byte values of which only the lower three - # bytes are used). These are the formats returned by gl.lrectread. - if verbose: - print 'Writing output file' - imgfile.write (outputfile, image, sizes[0], sizes[1], sizes[2]) - - - if verbose: - print 'Opening scaled test image: %s, sizes: %s' % (name, str(sizes)) - # This function is identical to read but it returns an image that - # is scaled to the given x and y sizes. If the filter and blur - # parameters are omitted scaling is done by simply dropping - # or duplicating pixels, so the result will be less than perfect, - # especially for computer-generated images. Alternatively, - # you can specify a filter to use to smoothen the image after - # scaling. The filter forms supported are 'impulse', 'box', - # 'triangle', 'quadratic' and 'gaussian'. If a filter is - # specified blur is an optional parameter specifying the - # blurriness of the filter. It defaults to 1.0. readscaled - # makes no attempt to keep the aspect ratio correct, so that - # is the users' responsibility. - if verbose: - print 'Filtering with "impulse"' - simage = imgfile.readscaled (name, sizes[0]/2, sizes[1]/2, 'impulse', 2.0) - - # This function sets a global flag which defines whether the - # scan lines of the image are read or written from bottom to - # top (flag is zero, compatible with SGI GL) or from top to - # bottom(flag is one, compatible with X). The default is zero. - if verbose: - print 'Switching to X compatibility' - imgfile.ttob (1) - - if verbose: - print 'Filtering with "triangle"' - simage = imgfile.readscaled (name, sizes[0]/2, sizes[1]/2, 'triangle', 3.0) - if verbose: - print 'Switching back to SGI compatibility' - imgfile.ttob (0) - - if verbose: print 'Filtering with "quadratic"' - simage = imgfile.readscaled (name, sizes[0]/2, sizes[1]/2, 'quadratic') - if verbose: print 'Filtering with "gaussian"' - simage = imgfile.readscaled (name, sizes[0]/2, sizes[1]/2, 'gaussian', 1.0) - - if verbose: - print 'Writing output file' - imgfile.write (outputfile, simage, sizes[0]/2, sizes[1]/2, sizes[2]) - - os.unlink(outputfile) - -main() |