1
  2pngsuite
  3--------
  4(c) Willem van Schaik, 1999, 2011, 2012
  5Two images are by Glenn Randers-Pehrson, 2012
  6
  7Permission to use, copy, modify, and distribute these images for any
  8purpose and without fee is hereby granted.
  9
 10The 15 "bas*.png" images are part of the much larger PngSuite test-set of
 11images, available for developers of PNG supporting software. The
 12complete set, available at http:/www.schaik.com/pngsuite/, contains
 13a variety of images to test interlacing, gamma settings, ancillary
 14chunks, etc.
 15
 16The "ft*.png" images are "free/libre" replacements for the transparent
 17corresponding t*.png images in the PngSuite.
 18
 19The images in this directory represent the basic PNG color-types:
 20grayscale (1-16 bit deep), full color (8 or 16 bit), paletted
 21(1-8 bit) and grayscale or color images with alpha channel. You
 22can use them to test the proper functioning of PNG software.
 23
 24    filename       depth type
 25    ------------ ------ --------------
 26    basn0g01.png   1-bit grayscale
 27    basn0g02.png   2-bit grayscale
 28    basn0g04.png   4-bit grayscale
 29    basn0g08.png   8-bit grayscale
 30    basn0g16.png  16-bit grayscale
 31    basn2c08.png   8-bit truecolor
 32    basn2c16.png  16-bit truecolor
 33    basn3p01.png   1-bit paletted
 34    basn3p02.png   2-bit paletted
 35    basn3p04.png   4-bit paletted
 36    basn3p08.png   8-bit paletted
 37    basn4a08.png   8-bit gray with alpha
 38    basn4a16.png  16-bit gray with alpha
 39    basn6a08.png   8-bit RGBA
 40    basn6a16.png  16-bit RGBA
 41
 42    ftbbn0g01.png  1-bit grayscale, black bKGD
 43    ftbbn0g02.png  2-bit grayscale, black bKGD
 44    ftbbn0g04.png  4-bit grayscale, black bKGD
 45    ftbbn2c16.png 16-bit truecolor, black bKGD
 46    ftbbn3p08.png  8-bit paletted, black bKGD
 47    ftbgn2c16.png 16-bit truecolor, gray bKGD
 48    ftbgn3p08.png  8-bit paletted, gray bKGD
 49    ftbrn2c08.png  8-bit truecolor, red bKGD
 50    ftbwn0g16.png 16-bit gray, white bKGD
 51    ftbwn3p08.png  8-bit paletted, white bKGD
 52    ftbyn3p08.png  8-bit paletted, yellow bKGD
 53    ftp0n0g08.png  8-bit grayscale, opaque
 54    ftp0n2c08.png  8-bit truecolor, opaque
 55    ftp0n3p08.png  8-bit paletted, opaque
 56    ftp1n3p08.png  8-bit paletted, no bKGD
 57
 58Here is the correct result of typing "pngtest -m bas*.png" in
 59this directory:
 60
 61Testing basn0g01.png: PASS (524 zero samples)
 62 Filter 0 was used 32 times
 63Testing basn0g02.png: PASS (448 zero samples)
 64 Filter 0 was used 32 times
 65Testing basn0g04.png: PASS (520 zero samples)
 66 Filter 0 was used 32 times
 67Testing basn0g08.png: PASS (3 zero samples)
 68 Filter 1 was used 9 times
 69 Filter 4 was used 23 times
 70Testing basn0g16.png: PASS (1 zero samples)
 71 Filter 1 was used 1 times
 72 Filter 2 was used 31 times
 73Testing basn2c08.png: PASS (6 zero samples)
 74 Filter 1 was used 5 times
 75 Filter 4 was used 27 times
 76Testing basn2c16.png: PASS (592 zero samples)
 77 Filter 1 was used 1 times
 78 Filter 4 was used 31 times
 79Testing basn3p01.png: PASS (512 zero samples)
 80 Filter 0 was used 32 times
 81Testing basn3p02.png: PASS (448 zero samples)
 82 Filter 0 was used 32 times
 83Testing basn3p04.png: PASS (544 zero samples)
 84 Filter 0 was used 32 times
 85Testing basn3p08.png: PASS (4 zero samples)
 86 Filter 0 was used 32 times
 87Testing basn4a08.png: PASS (32 zero samples)
 88 Filter 1 was used 1 times
 89 Filter 4 was used 31 times
 90Testing basn4a16.png: PASS (64 zero samples)
 91 Filter 0 was used 1 times
 92 Filter 1 was used 2 times
 93 Filter 2 was used 1 times
 94 Filter 4 was used 28 times
 95Testing basn6a08.png: PASS (160 zero samples)
 96 Filter 1 was used 1 times
 97 Filter 4 was used 31 times
 98Testing basn6a16.png: PASS (1072 zero samples)
 99 Filter 1 was used 4 times
100 Filter 4 was used 28 times
101libpng passes test
102
103Willem van Schaik
104<willem@schaik.com>
105October 1999