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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -19,7 +19,7 @@ # Settings OUTPUT_FILE = "max.png" # Do I really need to explain this? IMAGE_W, IMAGE_H = 0x7FFFFFFF, 0x7FFFFFFF # image size [pixels] DEPTH = 4 # Color depth [bytes/pixel] # 1 Grayscale -
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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -19,7 +19,7 @@ # Settings OUTPUT_FILE = "max.png" # Do I really need to explain this? IMAGE_W, IMAGE_H = 0x7FFFFFF, 0x7FFFFFFF # image size [pixels] DEPTH = 4 # Color depth [bytes/pixel] # 1 Grayscale -
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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,86 @@ #!/usr/bin/env python # Maximum PNG generator __copyright__ = "Copyright (C) 2016 Victor Zheng" __licence__ = "GNU GPL v3" # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. # Settings OUTPUT_FILE = "max.png" # Do I really need to explain this? IMAGE_W, IMAGE_H = 0x7FFFFFF, 0x7FFFFFF # image size [pixels] DEPTH = 4 # Color depth [bytes/pixel] # 1 Grayscale # 3 RGB # 4 RGBA # Script import struct import zlib def B(x): return struct.pack(">B", x & 0xFF) def I4(x): return struct.pack(">I", x & 0xFFFFFFFF) pixels = b"" # too lazy... def writePNG(): width = IMAGE_W height = IMAGE_H bitdepth = 16 # [bit/sample] if DEPTH == 1: colortype = 0 elif DEPTH == 3: colortype = 2 elif DEPTH == 4: colortype = 6 else: raise NotImplementedError("Unsupported color depth " + DEPTH) compresstype = 0 # DEFLATE (only supported method) filtermethod = 0 # adaptive (only supported method) interlaced = 0 # no with open(OUTPUT_FILE, "wb") as f: # Signature f.write(b"\x89PNG\r\n\x1A\n") # IHDR IHDR = b"IHDR" \ + I4(width) \ + I4(height) \ + B(bitdepth) \ + B(colortype) \ + B(compresstype) \ + B(filtermethod) \ + B(interlaced) f.write(I4(len(IHDR) - 4)) f.write(IHDR) f.write(I4(zlib.crc32(IHDR))) # IDAT compressor = zlib.compressobj(9) # max compression IDAT = b"IDAT" + \ compressor.compress(pixels) + \ compressor.flush() f.write(I4(len(IDAT) - 4)) f.write(IDAT) f.write(I4(zlib.crc32(IDAT))) # IEND # 0x00000000 + "IEND" + CRC32("IEND") f.write(b"\0\0\0\0IEND\xae\x42\x60\x82") if __name__ == '__main__': writePNG()