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#!/usr/bin/env python
import os
import sys
import subprocess
#optimize png, remove various color profiles, remove ancillary chunks (alla) and text chunks (text)
#pngcrush -brute -ow -rem gAMA -rem cHRM -rem iCCP -rem sRGB -rem alla -rem text
folders = ["src/qt/res/movies", "src/qt/res/icons", "src/qt/res/images"]
basePath = subprocess.check_output("git rev-parse --show-toplevel", shell=True).rstrip('\n')
totalSaveBytes = 0
outputArray = []
for folder in folders:
absFolder=os.path.join(basePath, folder)
for file in os.listdir(absFolder):
extension = os.path.splitext(file)[1]
if extension.lower() == '.png':
print("optimizing "+file+"..."),
file_path = os.path.join(absFolder, file)
fileMetaMap = {'file' : file, 'osize': os.path.getsize(file_path), 'sha256Old' : subprocess.check_output("openssl dgst -sha256 "+file_path, shell=True).rstrip('\n')};
pngCrushOutput = ""
try:
pngCrushOutput = subprocess.check_output("pngcrush -brute -ow -rem gAMA -rem cHRM -rem iCCP -rem sRGB -rem alla -rem text "+file_path+" >/dev/null 2>&1", shell=True).rstrip('\n')
except:
print "pngcrush is not installed, aborting..."
sys.exit(0)
#verify
if "Not a PNG file" in subprocess.check_output("pngcrush -n -v "+file_path+" >/dev/null 2>&1", shell=True):
print "PNG file "+file+" is corrupted after crushing, check out pngcursh version"
sys.exit(1)
fileMetaMap['sha256New'] = subprocess.check_output("openssl dgst -sha256 "+file_path, shell=True).rstrip('\n')
fileMetaMap['psize'] = os.path.getsize(file_path)
outputArray.append(fileMetaMap)
print("done\n"),
print "summary:\n+++++++++++++++++"
for fileDict in outputArray:
oldHash = fileDict['sha256Old'].split("= ")[1]
newHash = fileDict['sha256New'].split("= ")[1]
totalSaveBytes += fileDict['osize'] - fileDict['psize']
print fileDict['file']+"\n size diff from: "+str(fileDict['osize'])+" to: "+str(fileDict['psize'])+"\n old sha256: "+oldHash+"\n new sha256: "+newHash+"\n"
print "completed. Total reduction: "+str(totalSaveBytes)+" bytes"
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