def save_chunk(self):
from PNG import tEXt
buffer = self.content.get_buffer()
c = tEXt(self.keyword.get_text(), buffer.get_text(*buffer.get_bounds()))
return c
if __name__ == "__main__":
import sys
from PNG import Png, tEXt
if len(sys.argv) != 4:
print "Syntax: png-set-text filename.png key content"
sys.exit(1)
(filename, key, content) = sys.argv[1:]
f = file(filename, 'rb')
png = Png.open(f)
f.close()
# Kill existing Metadata chunks
def chunk_killer(chunk):
if chunk.keyword == key:
png.chunks.remove(chunk)
[chunk_killer(c) for c in png.chunks if isinstance(c, tEXt)]
# Add a new one
c = tEXt(key, content)
# Insert this chunk right at the beginning, after the IHDR
png.chunks.insert(1, c)
# TODO: backup existing
f = file(filename, 'wb')
png.write(f)
f.close()
if __name__ == "__main__":
import sys
from PNG import Png, tEXt
if len(sys.argv) != 4:
print "Syntax: png-set-text filename.png key content"
sys.exit(1)
(filename, key, content) = sys.argv[1:]
f = file(filename, 'rb')
png = Png.open(f)
f.close()
# Kill existing Metadata chunks
def chunk_killer(chunk):
if chunk.keyword == key:
png.chunks.remove(chunk)
[chunk_killer(c) for c in png.chunks if isinstance(c, tEXt)]
# Add a new one
c = tEXt(key, content)
# Insert this chunk right at the beginning, after the IHDR
png.chunks.insert(1, c)
# TODO: backup existing
f = file(filename, 'wb')
png.write(f)
f.close()
