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Diffstat (limited to 'contrib/devtools/optimize-pngs.py')
| -rwxr-xr-x | contrib/devtools/optimize-pngs.py | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/contrib/devtools/optimize-pngs.py b/contrib/devtools/optimize-pngs.py new file mode 100755 index 0000000000..774968fc08 --- /dev/null +++ b/contrib/devtools/optimize-pngs.py @@ -0,0 +1,49 @@ +#!/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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