X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ec20a753b99f318de3bccf86a741a867717e6a92..c8841d1493e0d19085990c9e331dd85c4da45d8e:/misc/scripts/png2c.py?ds=inline diff --git a/misc/scripts/png2c.py b/misc/scripts/png2c.py index f028201771..e1ea837324 100755 --- a/misc/scripts/png2c.py +++ b/misc/scripts/png2c.py @@ -13,8 +13,11 @@ import os.path import re import array -USAGE = """png2c - Embed a PNG in a C header file (like XPM) -Usage: png2c [file ..] Output input PNG files as C structures on stdout""" +USAGE = """Usage: png2c [-s] [file...] +Output input PNG files as C arrays to standard output. Used to embed PNG images +in C code (like XPM but with full alpha channel support). + + -s embed the image size in the image names in generated code.""" if len(sys.argv) < 2: print USAGE @@ -22,11 +25,17 @@ if len(sys.argv) < 2: r = re.compile("^([a-zA-Z._][a-zA-Z._0-9]*)[.][pP][nN][gG]$") +with_size = 0 +size_suffix = '' for path in sys.argv[1:]: - filename = os.path.basename(path) + if path == '-s': + with_size = 1 + continue + + filename = os.path.basename(path).replace('-','_') m = r.match(filename) - # Allow only filenames that make sense - # as C variable names + + # Allow only filenames that make sense as C variable names if not(m): print "Skipped file (unsuitable filename): " + filename continue @@ -35,9 +44,31 @@ for path in sys.argv[1:]: bytes = array.array('B', open(path, "rb").read()) count = len(bytes) + # Check that it's actually a PNG to avoid problems when loading it + # later. + # + # Each PNG file starts with a 8 byte signature that should be followed + # by IHDR chunk which is always 13 bytes in length so the first 16 + # bytes are fixed (or at least we expect them to be). + if bytes[0:16].tostring() != '\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR': + print '"%s" doesn\'t seem to be a valid PNG file.' % filename + continue + + # Try to naively get its size if necessary + if with_size: + def getInt(start): + """ Convert 4 bytes in network byte order to an integer. """ + return 16777216*bytes[start] + \ + 65536*bytes[start+1] + \ + 256*bytes[start+2] + \ + bytes[start+3]; + + size_suffix = "_%dx%d" % (getInt(16), getInt(20)) + # Create the C header text = "/* %s - %d bytes */\n" \ - "static const unsigned char %s_png[] = {\n" % (filename, count, m.group(1)) + "static const unsigned char %s%s_png[] = {\n" % ( + filename, count, m.group(1), size_suffix) # Iterate the characters, we want # lines like: @@ -51,10 +82,10 @@ for path in sys.argv[1:]: # Then the hex data (up to 8 values per line) text += "0x%02x" % (byte) # Separate all but the last values - if (i + 1) < count: - text += ", " if (i % 8) == 7: - text += '\n' + text += ',\n' + elif (i + 1) < count: + text += ", " i += 1 # Now conclude the C source