From 508d270a4d78d491bbe1c67c309c404f547da58a Mon Sep 17 00:00:00 2001 From: Thomas Groman Date: Mon, 20 Apr 2020 20:56:28 -0700 Subject: added Comm Build System --- build/autoconf/mozconfig-find | 76 ++++++ build/autoconf/mozconfig2client-mk | 76 ++++++ build/dumbmake-dependencies | 0 build/mach_bootstrap.py | 14 + build/pymake/make.py | 40 +++ build/pypng/check-sync-exceptions | 3 + build/pypng/exnumpy.py | 128 +++++++++ build/pypng/iccp.py | 537 +++++++++++++++++++++++++++++++++++++ build/pypng/mkiccp.py | 45 ++++ build/pypng/pdsimgtopng | 99 +++++++ build/pypng/pipasgrey | 73 +++++ build/pypng/pipcat | 44 +++ build/pypng/pipcolours | 56 ++++ build/pypng/pipcomposite | 121 +++++++++ build/pypng/pipdither | 181 +++++++++++++ build/pypng/piprgb | 36 +++ build/pypng/pipscalez | 53 ++++ build/pypng/pipstack | 127 +++++++++ build/pypng/pipwindow | 67 +++++ build/pypng/plan9topng.py | 293 ++++++++++++++++++++ build/pypng/pngchunk | 172 ++++++++++++ build/pypng/pnghist | 79 ++++++ build/pypng/pnglsch | 31 +++ build/pypng/texttopng | 151 +++++++++++ 24 files changed, 2502 insertions(+) create mode 100755 build/autoconf/mozconfig-find create mode 100755 build/autoconf/mozconfig2client-mk create mode 100644 build/dumbmake-dependencies create mode 100644 build/mach_bootstrap.py create mode 100755 build/pymake/make.py create mode 100644 build/pypng/check-sync-exceptions create mode 100644 build/pypng/exnumpy.py create mode 100644 build/pypng/iccp.py create mode 100644 build/pypng/mkiccp.py create mode 100644 build/pypng/pdsimgtopng create mode 100644 build/pypng/pipasgrey create mode 100644 build/pypng/pipcat create mode 100644 build/pypng/pipcolours create mode 100644 build/pypng/pipcomposite create mode 100644 build/pypng/pipdither create mode 100644 build/pypng/piprgb create mode 100644 build/pypng/pipscalez create mode 100644 build/pypng/pipstack create mode 100644 build/pypng/pipwindow create mode 100644 build/pypng/plan9topng.py create mode 100644 build/pypng/pngchunk create mode 100644 build/pypng/pnghist create mode 100644 build/pypng/pnglsch create mode 100644 build/pypng/texttopng (limited to 'build') diff --git a/build/autoconf/mozconfig-find b/build/autoconf/mozconfig-find new file mode 100755 index 0000000..97dd90c --- /dev/null +++ b/build/autoconf/mozconfig-find @@ -0,0 +1,76 @@ +#! /bin/sh +# +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +# mozconfigfind - Loads options from .mozconfig onto configure's +# command-line. The .mozconfig file is searched for in the +# order: +# If $MOZCONFIG is set, use that. +# If one of $TOPSRCDIR/.mozconfig or $TOPSRCDIR/mozconfig exists, use it. +# If both exist, or if various legacy locations contain a mozconfig, error. +# Otherwise, use the default build options. +# +topsrcdir=$1 + +abspath() { + if uname -s | grep -q MINGW; then + # We have no way to figure out whether we're in gmake or pymake right + # now. gmake gives us Unix-style paths while pymake gives us Windows-style + # paths, so attempt to handle both. + regexes='^\([A-Za-z]:\|\\\\\|\/\) ^\/' + else + regexes='^\/' + fi + + for regex in $regexes; do + if echo $1 | grep -q $regex; then + echo $1 + return + fi + done + + # If we're at this point, we have a relative path + echo `pwd`/$1 +} + +if [ -n "$MOZCONFIG" ] && ! [ -f "$MOZCONFIG" ]; then + echo "Specified MOZCONFIG \"$MOZCONFIG\" does not exist!" 1>&2 + exit 1 +fi + +if [ -n "$MOZ_MYCONFIG" ]; then + echo "Your environment currently has the MOZ_MYCONFIG variable set to \"$MOZ_MYCONFIG\". MOZ_MYCONFIG is no longer supported. Please use MOZCONFIG instead." 1>&2 + exit 1 +fi + +if [ -z "$MOZCONFIG" ] && [ -f "$topsrcdir/.mozconfig" ] && [ -f "$topsrcdir/mozconfig" ]; then + echo "Both \$topsrcdir/.mozconfig and \$topsrcdir/mozconfig are supported, but you must choose only one. Please remove the other." 1>&2 + exit 1 +fi + +for _config in "$MOZCONFIG" \ + "$topsrcdir/.mozconfig" \ + "$topsrcdir/mozconfig" +do + if test -f "$_config"; then + abspath $_config + exit 0 + fi +done + +# We used to support a number of other implicit .mozconfig locations. We now +# detect if we were about to use any of these locations and issue an error if we +# find any. +for _config in "$topsrcdir/mozconfig.sh" \ + "$topsrcdir/myconfig.sh" \ + "$HOME/.mozconfig" \ + "$HOME/.mozconfig.sh" \ + "$HOME/.mozmyconfig.sh" +do + if test -f "$_config"; then + echo "You currently have a mozconfig at \"$_config\". This implicit location is no longer supported. Please move it to $topsrcdir/.mozconfig or specify it explicitly via \$MOZCONFIG." 1>&2 + exit 1 + fi +done diff --git a/build/autoconf/mozconfig2client-mk b/build/autoconf/mozconfig2client-mk new file mode 100755 index 0000000..aaf8de1 --- /dev/null +++ b/build/autoconf/mozconfig2client-mk @@ -0,0 +1,76 @@ +#! /bin/sh +# +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +# mozconfig2client-mk - Translates .mozconfig into options for client.mk. +# Prints defines to stdout. +# +# See mozconfig2configure for more details + +print_header() { + cat <@' with '$()'. + _opt=`echo "$_opt" | sed -e 's/\([\"\\]\)/\\\\\1/g; s/@\([^@]*\)@/\$(\1)/g;'` + echo $_opt; + done +} + +# Main +#-------------------------------------------------- + +scriptdir=`dirname $0` +topsrcdir=$1 + +# If the path changes, configure should be rerun +echo "# PATH=$PATH" + +# If FOUND_MOZCONFIG isn't set, look for it and make sure the script doesn't error out +isfoundset=${FOUND_MOZCONFIG+yes} +if [ -z $isfoundset ]; then + FOUND_MOZCONFIG=`$scriptdir/mozconfig-find $topsrcdir` + if [ $? -ne 0 ]; then + echo '$(error Fix above errors before continuing.)' + else + isfoundset=yes + fi +fi + +if [ -n $isfoundset ]; then + if [ "$FOUND_MOZCONFIG" ] + then + print_header + . "$FOUND_MOZCONFIG" + echo "FOUND_MOZCONFIG := $FOUND_MOZCONFIG" + fi +fi diff --git a/build/dumbmake-dependencies b/build/dumbmake-dependencies new file mode 100644 index 0000000..e69de29 diff --git a/build/mach_bootstrap.py b/build/mach_bootstrap.py new file mode 100644 index 0000000..896d028 --- /dev/null +++ b/build/mach_bootstrap.py @@ -0,0 +1,14 @@ +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +from __future__ import unicode_literals + +import os, sys + +def bootstrap(topsrcdir, mozilla_dir=None): + if mozilla_dir is None: + mozilla_dir = os.path.join(topsrcdir, 'platform') + sys.path[0:0] = [mozilla_dir] + import build.mach_bootstrap + return build.mach_bootstrap.bootstrap(topsrcdir, mozilla_dir) diff --git a/build/pymake/make.py b/build/pymake/make.py new file mode 100755 index 0000000..99d4839 --- /dev/null +++ b/build/pymake/make.py @@ -0,0 +1,40 @@ +#!/usr/bin/env python +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +# This is a wrapper around mozilla-central's pymake. If that isn't found then +# this uses client.py to pull it in. + +import os +import sys +import subprocess +import shlex + +def getpath(relpath): + thisdir = os.path.dirname(__file__) + return os.path.abspath(os.path.join(thisdir, *relpath)) + +PYMAKE = getpath(["..", "..", "platform", "build", "pymake", "make.py"]) + +def main(args): + if 'TINDERBOX_OUTPUT' in os.environ: + # When building on mozilla build slaves, execute mozmake instead. Until bug + # 978211, this is the easiest, albeit hackish, way to do this. + mozmake = os.path.join(os.path.dirname(__file__), '..', '..', + 'mozmake.exe') + if os.path.exists(mozmake): + cmd = [mozmake] + cmd.extend(sys.argv[1:]) + shell = os.environ.get('SHELL') + if shell and not shell.lower().endswith('.exe'): + cmd += ['SHELL=%s.exe' % shell] + sys.exit(subprocess.call(cmd)) + + if not os.path.exists(PYMAKE): + raise Exception("Pymake not found") + + subprocess.check_call([sys.executable, PYMAKE] + args) + +if __name__ == "__main__": + main(sys.argv[1:]) diff --git a/build/pypng/check-sync-exceptions b/build/pypng/check-sync-exceptions new file mode 100644 index 0000000..b326f7c --- /dev/null +++ b/build/pypng/check-sync-exceptions @@ -0,0 +1,3 @@ +# Nothing in this directory needs to be in sync with mozilla +# The contents are used only in c-c +* \ No newline at end of file diff --git a/build/pypng/exnumpy.py b/build/pypng/exnumpy.py new file mode 100644 index 0000000..82daf0a --- /dev/null +++ b/build/pypng/exnumpy.py @@ -0,0 +1,128 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/exnumpy.py $ +# $Rev: 126 $ + +# Numpy example. +# Original code created by Mel Raab, modified by David Jones. + +''' + Example code integrating RGB PNG files, PyPNG and NumPy + (abstracted from Mel Raab's functioning code) +''' + +# http://www.python.org/doc/2.4.4/lib/module-itertools.html +import itertools + +import numpy +import png + + +''' If you have a PNG file for an RGB image, + and want to create a numpy array of data from it. +''' +# Read the file "picture.png" from the current directory. The `Reader` +# class can take a filename, a file-like object, or the byte data +# directly; this suggests alternatives such as using urllib to read +# an image from the internet: +# png.Reader(file=urllib.urlopen('http://www.libpng.org/pub/png/PngSuite/basn2c16.png')) +pngReader=png.Reader(filename='picture.png') +# Tuple unpacking, using multiple assignment, is very useful for the +# result of asDirect (and other methods). +# See +# http://docs.python.org/tutorial/introduction.html#first-steps-towards-programming +row_count, column_count, pngdata, meta = pngReader.asDirect() +bitdepth=meta['bitdepth'] +plane_count=meta['planes'] + +# Make sure we're dealing with RGB files +assert plane_count == 3 + +''' Boxed row flat pixel: + list([R,G,B, R,G,B, R,G,B], + [R,G,B, R,G,B, R,G,B]) + Array dimensions for this example: (2,9) + + Create `image_2d` as a two-dimensional NumPy array by stacking a + sequence of 1-dimensional arrays (rows). + The NumPy array mimics PyPNG's (boxed row flat pixel) representation; + it will have dimensions ``(row_count,column_count*plane_count)``. +''' +# The use of ``numpy.uint16``, below, is to convert each row to a NumPy +# array with data type ``numpy.uint16``. This is a feature of NumPy, +# discussed further in +# http://docs.scipy.org/doc/numpy/user/basics.types.html . +# You can use avoid the explicit conversion with +# ``numpy.vstack(pngdata)``, but then NumPy will pick the array's data +# type; in practice it seems to pick ``numpy.int32``, which is large enough +# to hold any pixel value for any PNG image but uses 4 bytes per value when +# 1 or 2 would be enough. +# --- extract 001 start +image_2d = numpy.vstack(itertools.imap(numpy.uint16, pngdata)) +# --- extract 001 end +# Do not be tempted to use ``numpy.asarray``; when passed an iterator +# (`pngdata` is often an iterator) it will attempt to create a size 1 +# array with the iterator as its only element. +# An alternative to the above is to create the target array of the right +# shape, then populate it row by row: +if 0: + image_2d = numpy.zeros((row_count,plane_count*column_count), + dtype=numpy.uint16) + for row_index, one_boxed_row_flat_pixels in enumerate(pngdata): + image_2d[row_index,:]=one_boxed_row_flat_pixels + +del pngReader +del pngdata + + +''' Reconfigure for easier referencing, similar to + Boxed row boxed pixel: + list([ (R,G,B), (R,G,B), (R,G,B) ], + [ (R,G,B), (R,G,B), (R,G,B) ]) + Array dimensions for this example: (2,3,3) + + ``image_3d`` will contain the image as a three-dimensional numpy + array, having dimensions ``(row_count,column_count,plane_count)``. +''' +# --- extract 002 start +image_3d = numpy.reshape(image_2d, + (row_count,column_count,plane_count)) +# --- extract 002 end + + +''' ============= ''' + +''' Convert NumPy image_3d array to PNG image file. + + If the data is three-dimensional, as it is above, the best thing + to do is reshape it into a two-dimensional array with a shape of + ``(row_count, column_count*plane_count)``. Because a + two-dimensional numpy array is an iterator, it can be passed + directly to the ``png.Writer.write`` method. +''' + +row_count, column_count, plane_count = image_3d.shape +assert plane_count==3 + +pngfile = open('picture_out.png', 'wb') +try: + # This example assumes that you have 16-bit pixel values in the data + # array (that's what the ``bitdepth=16`` argument is for). + # If you don't, then the resulting PNG file will likely be + # very dark. Hey, it's only an example. + pngWriter = png.Writer(column_count, row_count, + greyscale=False, + alpha=False, + bitdepth=16) + # As of 2009-04-13 passing a numpy array that has an element type + # that is a numpy integer type (for example, the `image_3d` array has an + # element type of ``numpy.uint16``) generates a deprecation warning. + # This is probably a bug in numpy; it may go away in the future. + # The code still works despite the warning. + # See http://code.google.com/p/pypng/issues/detail?id=44 +# --- extract 003 start + pngWriter.write(pngfile, + numpy.reshape(image_3d, (-1, column_count*plane_count))) +# --- extract 003 end +finally: + pngfile.close() + diff --git a/build/pypng/iccp.py b/build/pypng/iccp.py new file mode 100644 index 0000000..190db73 --- /dev/null +++ b/build/pypng/iccp.py @@ -0,0 +1,537 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/iccp.py $ +# $Rev: 182 $ + +# iccp +# +# International Color Consortium Profile +# +# Tools for manipulating ICC profiles. +# +# An ICC profile can be extracted from a PNG image (iCCP chunk). +# +# +# Non-standard ICCP tags. +# +# Apple use some (widespread but) non-standard tags. These can be +# displayed in Apple's ColorSync Utility. +# - 'vcgt' (Video Card Gamma Tag). Table to load into video +# card LUT to apply gamma. +# - 'ndin' Apple display native information. +# - 'dscm' Apple multi-localized description strings. +# - 'mmod' Apple display make and model information. +# + +# References +# +# [ICC 2001] ICC Specification ICC.1:2001-04 (Profile version 2.4.0) +# [ICC 2004] ICC Specification ICC.1:2004-10 (Profile version 4.2.0.0) + +import struct + +import png + +class FormatError(Exception): + pass + +class Profile: + """An International Color Consortium Profile (ICC Profile).""" + + def __init__(self): + self.rawtagtable = None + self.rawtagdict = {} + self.d = dict() + + def fromFile(self, inp, name=''): + + # See [ICC 2004] + profile = inp.read(128) + if len(profile) < 128: + raise FormatError("ICC Profile is too short.") + size, = struct.unpack('>L', profile[:4]) + profile += inp.read(d['size'] - len(profile)) + return self.fromString(profile, name) + + def fromString(self, profile, name=''): + self.d = dict() + d = self.d + if len(profile) < 128: + raise FormatError("ICC Profile is too short.") + d.update( + zip(['size', 'preferredCMM', 'version', + 'profileclass', 'colourspace', 'pcs'], + struct.unpack('>L4sL4s4s4s', profile[:24]))) + if len(profile) < d['size']: + warnings.warn( + 'Profile size declared to be %d, but only got %d bytes' % + (d['size'], len(profile))) + d['version'] = '%08x' % d['version'] + d['created'] = readICCdatetime(profile[24:36]) + d.update( + zip(['acsp', 'platform', 'flag', 'manufacturer', 'model'], + struct.unpack('>4s4s3L', profile[36:56]))) + if d['acsp'] != 'acsp': + warnings.warn('acsp field not present (not an ICC Profile?).') + d['deviceattributes'] = profile[56:64] + d['intent'], = struct.unpack('>L', profile[64:68]) + d['pcsilluminant'] = readICCXYZNumber(profile[68:80]) + d['creator'] = profile[80:84] + d['id'] = profile[84:100] + ntags, = struct.unpack('>L', profile[128:132]) + d['ntags'] = ntags + fmt = '4s2L' * ntags + # tag table + tt = struct.unpack('>' + fmt, profile[132:132+12*ntags]) + tt = group(tt, 3) + + # Could (should) detect 2 or more tags having the same sig. But + # we don't. Two or more tags with the same sig is illegal per + # the ICC spec. + + # Convert (sig,offset,size) triples into (sig,value) pairs. + rawtag = map(lambda x: (x[0], profile[x[1]:x[1]+x[2]]), tt) + self.rawtagtable = rawtag + self.rawtagdict = dict(rawtag) + tag = dict() + # Interpret the tags whose types we know about + for sig, v in rawtag: + if sig in tag: + warnings.warn("Duplicate tag %r found. Ignoring." % sig) + continue + v = ICCdecode(v) + if v is not None: + tag[sig] = v + self.tag = tag + return self + + def greyInput(self): + """Adjust ``self.d`` dictionary for greyscale input device. + ``profileclass`` is 'scnr', ``colourspace`` is 'GRAY', ``pcs`` + is 'XYZ '. + """ + + self.d.update(dict(profileclass='scnr', + colourspace='GRAY', pcs='XYZ ')) + return self + + def maybeAddDefaults(self): + if self.rawtagdict: + return + self._addTags( + cprt='Copyright unknown.', + desc='created by $URL: http://pypng.googlecode.com/svn/trunk/code/iccp.py $ $Rev: 182 $', + wtpt=D50(), + ) + + def addTags(self, **k): + self.maybeAddDefaults() + self._addTags(**k) + + def _addTags(self, **k): + """Helper for :meth:`addTags`.""" + + for tag, thing in k.items(): + if not isinstance(thing, (tuple, list)): + thing = (thing,) + typetag = defaulttagtype[tag] + self.rawtagdict[tag] = encode(typetag, *thing) + return self + + def write(self, out): + """Write ICC Profile to the file.""" + + if not self.rawtagtable: + self.rawtagtable = self.rawtagdict.items() + tags = tagblock(self.rawtagtable) + self.writeHeader(out, 128 + len(tags)) + out.write(tags) + out.flush() + + return self + + def writeHeader(self, out, size=999): + """Add default values to the instance's `d` dictionary, then + write a header out onto the file stream. The size of the + profile must be specified using the `size` argument. + """ + + def defaultkey(d, key, value): + """Add ``[key]==value`` to the dictionary `d`, but only if + it does not have that key already. + """ + + if key in d: + return + d[key] = value + + z = '\x00' * 4 + defaults = dict(preferredCMM=z, + version='02000000', + profileclass=z, + colourspace=z, + pcs='XYZ ', + created=writeICCdatetime(), + acsp='acsp', + platform=z, + flag=0, + manufacturer=z, + model=0, + deviceattributes=0, + intent=0, + pcsilluminant=encodefuns()['XYZ'](*D50()), + creator=z, + ) + for k,v in defaults.items(): + defaultkey(self.d, k, v) + + hl = map(self.d.__getitem__, + ['preferredCMM', 'version', 'profileclass', 'colourspace', + 'pcs', 'created', 'acsp', 'platform', 'flag', + 'manufacturer', 'model', 'deviceattributes', 'intent', + 'pcsilluminant', 'creator']) + # Convert to struct.pack input + hl[1] = int(hl[1], 16) + + out.write(struct.pack('>L4sL4s4s4s12s4s4sL4sLQL12s4s', size, *hl)) + out.write('\x00' * 44) + return self + +def encodefuns(): + """Returns a dictionary mapping ICC type signature sig to encoding + function. Each function returns a string comprising the content of + the encoded value. To form the full value, the type sig and the 4 + zero bytes should be prefixed (8 bytes). + """ + + def desc(ascii): + """Return textDescription type [ICC 2001] 6.5.17. The ASCII part is + filled in with the string `ascii`, the Unicode and ScriptCode parts + are empty.""" + + ascii += '\x00' + l = len(ascii) + + return struct.pack('>L%ds2LHB67s' % l, + l, ascii, 0, 0, 0, 0, '') + + def text(ascii): + """Return textType [ICC 2001] 6.5.18.""" + + return ascii + '\x00' + + def curv(f=None, n=256): + """Return a curveType, [ICC 2001] 6.5.3. If no arguments are + supplied then a TRC for a linear response is generated (no entries). + If an argument is supplied and it is a number (for *f* to be a + number it means that ``float(f)==f``) then a TRC for that + gamma value is generated. + Otherwise `f` is assumed to be a function that maps [0.0, 1.0] to + [0.0, 1.0]; an `n` element table is generated for it. + """ + + if f is None: + return struct.pack('>L', 0) + try: + if float(f) == f: + return struct.pack('>LH', 1, int(round(f*2**8))) + except (TypeError, ValueError): + pass + assert n >= 2 + table = [] + M = float(n-1) + for i in range(n): + x = i/M + table.append(int(round(f(x) * 65535))) + return struct.pack('>L%dH' % n, n, *table) + + def XYZ(*l): + return struct.pack('>3l', *map(fs15f16, l)) + + return locals() + +# Tag type defaults. +# Most tags can only have one or a few tag types. +# When encoding, we associate a default tag type with each tag so that +# the encoding is implicit. +defaulttagtype=dict( + A2B0='mft1', + A2B1='mft1', + A2B2='mft1', + bXYZ='XYZ', + bTRC='curv', + B2A0='mft1', + B2A1='mft1', + B2A2='mft1', + calt='dtim', + targ='text', + chad='sf32', + chrm='chrm', + cprt='desc', + crdi='crdi', + dmnd='desc', + dmdd='desc', + devs='', + gamt='mft1', + kTRC='curv', + gXYZ='XYZ', + gTRC='curv', + lumi='XYZ', + meas='', + bkpt='XYZ', + wtpt='XYZ', + ncol='', + ncl2='', + resp='', + pre0='mft1', + pre1='mft1', + pre2='mft1', + desc='desc', + pseq='', + psd0='data', + psd1='data', + psd2='data', + psd3='data', + ps2s='data', + ps2i='data', + rXYZ='XYZ', + rTRC='curv', + scrd='desc', + scrn='', + tech='sig', + bfd='', + vued='desc', + view='view', +) + +def encode(tsig, *l): + """Encode a Python value as an ICC type. `tsig` is the type + signature to (the first 4 bytes of the encoded value, see [ICC 2004] + section 10. + """ + + fun = encodefuns() + if tsig not in fun: + raise "No encoder for type %r." % tsig + v = fun[tsig](*l) + # Padd tsig out with spaces. + tsig = (tsig + ' ')[:4] + return tsig + '\x00'*4 + v + +def tagblock(tag): + """`tag` should be a list of (*signature*, *element*) pairs, where + *signature* (the key) is a length 4 string, and *element* is the + content of the tag element (another string). + + The entire tag block (consisting of first a table and then the + element data) is constructed and returned as a string. + """ + + n = len(tag) + tablelen = 12*n + + # Build the tag table in two parts. A list of 12-byte tags, and a + # string of element data. Offset is the offset from the start of + # the profile to the start of the element data (so the offset for + # the next element is this offset plus the length of the element + # string so far). + offset = 128 + tablelen + 4 + # The table. As a string. + table = '' + # The element data + element = '' + for k,v in tag: + table += struct.pack('>4s2L', k, offset + len(element), len(v)) + element += v + return struct.pack('>L', n) + table + element + +def iccp(out, inp): + profile = Profile().fromString(*profileFromPNG(inp)) + print >>out, profile.d + print >>out, map(lambda x: x[0], profile.rawtagtable) + print >>out, profile.tag + +def profileFromPNG(inp): + """Extract profile from PNG file. Return (*profile*, *name*) + pair.""" + r = png.Reader(file=inp) + _,chunk = r.chunk('iCCP') + i = chunk.index('\x00') + name = chunk[:i] + compression = chunk[i+1] + assert compression == chr(0) + profile = chunk[i+2:].decode('zlib') + return profile, name + +def iccpout(out, inp): + """Extract ICC Profile from PNG file `inp` and write it to + the file `out`.""" + + out.write(profileFromPNG(inp)[0]) + +def fs15f16(x): + """Convert float to ICC s15Fixed16Number (as a Python ``int``).""" + + return int(round(x * 2**16)) + +def D50(): + """Return D50 illuminant as an (X,Y,Z) triple.""" + + # See [ICC 2001] A.1 + return (0.9642, 1.0000, 0.8249) + + +def writeICCdatetime(t=None): + """`t` should be a gmtime tuple (as returned from + ``time.gmtime()``). If not supplied, the current time will be used. + Return an ICC dateTimeNumber in a 12 byte string. + """ + + import time + if t is None: + t = time.gmtime() + return struct.pack('>6H', *t[:6]) + +def readICCdatetime(s): + """Convert from 12 byte ICC representation of dateTimeNumber to + ISO8601 string. See [ICC 2004] 5.1.1""" + + return '%04d-%02d-%02dT%02d:%02d:%02dZ' % struct.unpack('>6H', s) + +def readICCXYZNumber(s): + """Convert from 12 byte ICC representation of XYZNumber to (x,y,z) + triple of floats. See [ICC 2004] 5.1.11""" + + return s15f16l(s) + +def s15f16l(s): + """Convert sequence of ICC s15Fixed16 to list of float.""" + # Note: As long as float has at least 32 bits of mantissa, all + # values are preserved. + n = len(s)//4 + t = struct.unpack('>%dl' % n, s) + return map((2**-16).__mul__, t) + +# Several types and their byte encodings are defined by [ICC 2004] +# section 10. When encoded, a value begins with a 4 byte type +# signature. We use the same 4 byte type signature in the names of the +# Python functions that decode the type into a Pythonic representation. + +def ICCdecode(s): + """Take an ICC encoded tag, and dispatch on its type signature + (first 4 bytes) to decode it into a Python value. Pair (*sig*, + *value*) is returned, where *sig* is a 4 byte string, and *value* is + some Python value determined by the content and type. + """ + + sig = s[0:4].strip() + f=dict(text=RDtext, + XYZ=RDXYZ, + curv=RDcurv, + vcgt=RDvcgt, + sf32=RDsf32, + ) + if sig not in f: + return None + return (sig, f[sig](s)) + +def RDXYZ(s): + """Convert ICC XYZType to rank 1 array of trimulus values.""" + + # See [ICC 2001] 6.5.26 + assert s[0:4] == 'XYZ ' + return readICCXYZNumber(s[8:]) + +def RDsf32(s): + """Convert ICC s15Fixed16ArrayType to list of float.""" + # See [ICC 2004] 10.18 + assert s[0:4] == 'sf32' + return s15f16l(s[8:]) + +def RDmluc(s): + """Convert ICC multiLocalizedUnicodeType. This types encodes + several strings together with a language/country code for each + string. A list of (*lc*, *string*) pairs is returned where *lc* is + the 4 byte language/country code, and *string* is the string + corresponding to that code. It seems unlikely that the same + language/country code will appear more than once with different + strings, but the ICC standard does not prohibit it.""" + # See [ICC 2004] 10.13 + assert s[0:4] == 'mluc' + n,sz = struct.unpack('>2L', s[8:16]) + assert sz == 12 + record = [] + for i in range(n): + lc,l,o = struct.unpack('4s2L', s[16+12*n:28+12*n]) + record.append(lc, s[o:o+l]) + # How are strings encoded? + return record + +def RDtext(s): + """Convert ICC textType to Python string.""" + # Note: type not specified or used in [ICC 2004], only in older + # [ICC 2001]. + # See [ICC 2001] 6.5.18 + assert s[0:4] == 'text' + return s[8:-1] + +def RDcurv(s): + """Convert ICC curveType.""" + # See [ICC 2001] 6.5.3 + assert s[0:4] == 'curv' + count, = struct.unpack('>L', s[8:12]) + if count == 0: + return dict(gamma=1) + table = struct.unpack('>%dH' % count, s[12:]) + if count == 1: + return dict(gamma=table[0]*2**-8) + return table + +def RDvcgt(s): + """Convert Apple CMVideoCardGammaType.""" + # See + # http://developer.apple.com/documentation/GraphicsImaging/Reference/ColorSync_Manager/Reference/reference.html#//apple_ref/c/tdef/CMVideoCardGammaType + assert s[0:4] == 'vcgt' + tagtype, = struct.unpack('>L', s[8:12]) + if tagtype != 0: + return s[8:] + if tagtype == 0: + # Table. + channels,count,size = struct.unpack('>3H', s[12:18]) + if size == 1: + fmt = 'B' + elif size == 2: + fmt = 'H' + else: + return s[8:] + l = len(s[18:])//size + t = struct.unpack('>%d%s' % (l, fmt), s[18:]) + t = group(t, count) + return size, t + return s[8:] + + +def group(s, n): + # See + # http://www.python.org/doc/2.6/library/functions.html#zip + return zip(*[iter(s)]*n) + + +def main(argv=None): + import sys + from getopt import getopt + if argv is None: + argv = sys.argv + argv = argv[1:] + opt,arg = getopt(argv, 'o:') + if len(arg) > 0: + inp = open(arg[0], 'rb') + else: + inp = sys.stdin + for o,v in opt: + if o == '-o': + f = open(v, 'wb') + return iccpout(f, inp) + return iccp(sys.stdout, inp) + +if __name__ == '__main__': + main() diff --git a/build/pypng/mkiccp.py b/build/pypng/mkiccp.py new file mode 100644 index 0000000..08e8df6 --- /dev/null +++ b/build/pypng/mkiccp.py @@ -0,0 +1,45 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/mkiccp.py $ +# $Rev: 182 $ +# Make ICC Profile + +# References +# +# [ICC 2001] ICC Specification ICC.1:2001-04 (Profile version 2.4.0) +# [ICC 2004] ICC Specification ICC.1:2004-10 (Profile version 4.2.0.0) + +import struct + +# Local module. +import iccp + +def black(m): + """Return a function that maps all values from [0.0,m] to 0, and maps + the range [m,1.0] into [0.0, 1.0] linearly. + """ + + m = float(m) + + def f(x): + if x <= m: + return 0.0 + return (x-m)/(1.0-m) + return f + +# For monochrome input the required tags are (See [ICC 2001] 6.3.1.1): +# profileDescription [ICC 2001] 6.4.32 +# grayTRC [ICC 2001] 6.4.19 +# mediaWhitePoint [ICC 2001] 6.4.25 +# copyright [ICC 2001] 6.4.13 + +def agreyprofile(out): + it = iccp.Profile().greyInput() + it.addTags(kTRC=black(0.07)) + it.write(out) + +def main(): + import sys + agreyprofile(sys.stdout) + +if __name__ == '__main__': + main() diff --git a/build/pypng/pdsimgtopng b/build/pypng/pdsimgtopng new file mode 100644 index 0000000..975db93 --- /dev/null +++ b/build/pypng/pdsimgtopng @@ -0,0 +1,99 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/pdsimgtopng $ +# $Rev: 154 $ +# PDS Image to PNG + +import re +import struct + +import png + +class FormatError(Exception): + pass + +def pdskey(s, k): + """Lookup key `k` in string `s`. Returns value (as a string), or + raises exception if not found. + """ + + assert re.match(r' *\^?[:\w]+$', k) + safere = '^' + re.escape(k) +r' *= *(\w+)' + m = re.search(safere, s, re.MULTILINE) + if not m: + raise FormatError("Can't find %s." % k) + return m.group(1) + +def img(inp): + """Open the PDS IMG file `inp` and return (*pixels*, *info*). + *pixels* is an iterator over the rows, *info* is the information + dictionary. + """ + + err = __import__('sys').stderr + + consumed = 1024 + + s = inp.read(consumed) + record_type = pdskey(s, 'RECORD_TYPE') + if record_type != 'FIXED_LENGTH': + raise FormatError( + "Can only deal with FIXED_LENGTH record type (found %s)" % + record_type) + record_bytes = int(pdskey(s,'RECORD_BYTES')) + file_records = int(pdskey(s, 'FILE_RECORDS')) + label_records = int(pdskey(s, 'LABEL_RECORDS')) + remaining = label_records * record_bytes - consumed + s += inp.read(remaining) + consumed += remaining + + image_pointer = int(pdskey(s, '^IMAGE')) + # "^IMAGE" locates a record. Records are numbered starting from 1. + image_index = image_pointer - 1 + image_offset = image_index * record_bytes + gap = image_offset - consumed + assert gap >= 0 + if gap: + inp.read(gap) + # This assumes there is only one OBJECT in the file, and it is the + # IMAGE. + height = int(pdskey(s, ' LINES')) + width = int(pdskey(s, ' LINE_SAMPLES')) + sample_type = pdskey(s, ' SAMPLE_TYPE') + sample_bits = int(pdskey(s, ' SAMPLE_BITS')) + # For Messenger MDIS, SAMPLE_BITS is reported as 16, but only values + # from 0 ot 4095 are used. + bitdepth = 12 + if sample_type == 'MSB_UNSIGNED_INTEGER': + fmt = '>H' + else: + raise 'Unknown sample type: %s.' % sample_type + sample_bytes = (1,2)[bitdepth > 8] + row_bytes = sample_bytes * width + fmt = fmt[:1] + str(width) + fmt[1:] + def rowiter(): + for y in range(height): + yield struct.unpack(fmt, inp.read(row_bytes)) + info = dict(greyscale=True, alpha=False, bitdepth=bitdepth, + size=(width,height), gamma=1.0) + return rowiter(), info + + +def main(argv=None): + import sys + + if argv is None: + argv = sys.argv + argv = argv[1:] + arg = argv + if len(arg) >= 1: + f = open(arg[0], 'rb') + else: + f = sys.stdin + pixels,info = img(f) + w = png.Writer(**info) + w.write(sys.stdout, pixels) + +if __name__ == '__main__': + main() + + diff --git a/build/pypng/pipasgrey b/build/pypng/pipasgrey new file mode 100644 index 0000000..2b3727f --- /dev/null +++ b/build/pypng/pipasgrey @@ -0,0 +1,73 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/pipasgrey $ +# $Rev: 187 $ + +# pipasgrey + +# Convert image to grey (L, or LA), but only if that involves no colour +# change. + +def asgrey(out, inp, quiet=False): + """Convert image to greyscale, but only when no colour change. This + works by using the input G channel (green) as the output L channel + (luminance) and checking that every pixel is grey as we go. A non-grey + pixel will raise an error, but if `quiet` is true then the grey pixel + check is suppressed. + """ + + from array import array + + import png + + r = png.Reader(file=inp) + _,_,pixels,info = r.asDirect() + if info['greyscale']: + w = png.Writer(**info) + return w.write(out, pixels) + planes = info['planes'] + targetplanes = planes - 2 + alpha = info['alpha'] + width = info['size'][0] + typecode = 'BH'[info['bitdepth'] > 8] + # Values per target row + vpr = width * (targetplanes) + def iterasgrey(): + for i,row in enumerate(pixels): + row = array(typecode, row) + targetrow = array(typecode, [0]*vpr) + # Copy G (and possibly A) channel. + green = row[0::planes] + if alpha: + targetrow[0::2] = green + targetrow[1::2] = row[3::4] + else: + targetrow = green + # Check R and B channel match. + if not quiet and ( + green != row[0::planes] or green != row[2::planes]): + raise ValueError('Row %i contains non-grey pixel.' % i) + yield targetrow + info['greyscale'] = True + del info['planes'] + w = png.Writer(**info) + w.write(out, iterasgrey()) + +def main(argv=None): + from getopt import getopt + import sys + if argv is None: + argv = sys.argv + argv = argv[1:] + opt,argv = getopt(argv, 'q') + quiet = False + for o,v in opt: + if o == '-q': + quiet = True + if len(argv) > 0: + f = open(argv[0], 'rb') + else: + f = sys.stdin + return asgrey(sys.stdout, f, quiet) + +if __name__ == '__main__': + main() diff --git a/build/pypng/pipcat b/build/pypng/pipcat new file mode 100644 index 0000000..e0d0805 --- /dev/null +++ b/build/pypng/pipcat @@ -0,0 +1,44 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/pipcat $ +# $Rev: 77 $ + +# http://www.python.org/doc/2.4.4/lib/module-itertools.html +import itertools +import sys + +import png + +def cat(out, l): + """Concatenate the list of images. All input images must be same + height and have the same number of channels. They are concatenated + left-to-right. `out` is the (open file) destination for the + output image. `l` should be a list of open files (the input + image files). + """ + + l = map(lambda f: png.Reader(file=f), l) + # Ewgh, side effects. + map(lambda r: r.preamble(), l) + # The reference height; from the first image. + height = l[0].height + # The total target width + width = 0 + for i,r in enumerate(l): + if r.height != height: + raise Error('Image %d, height %d, does not match %d.' % + (i, r.height, height)) + width += r.width + pixel,info = zip(*map(lambda r: r.asDirect()[2:4], l)) + tinfo = dict(info[0]) + del tinfo['size'] + w = png.Writer(width, height, **tinfo) + def itercat(): + for row in itertools.izip(*pixel): + yield itertools.chain(*row) + w.write(out, itercat()) + +def main(argv): + return cat(sys.stdout, map(lambda n: open(n, 'rb'), argv[1:])) + +if __name__ == '__main__': + main(sys.argv) diff --git a/build/pypng/pipcolours b/build/pypng/pipcolours new file mode 100644 index 0000000..7c76df8 --- /dev/null +++ b/build/pypng/pipcolours @@ -0,0 +1,56 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/pipcolours $ +# $Rev: 96 $ + +# pipcolours - extract all colours present in source image. + +def colours(out, inp): + import itertools + import png + + r = png.Reader(file=inp) + _,_,pixels,info = r.asDirect() + planes = info['planes'] + col = set() + for row in pixels: + # Ewgh, side effects on col + map(col.add, png.group(row, planes)) + col,planes = channel_reduce(col, planes) + col = list(col) + col.sort() + col = list(itertools.chain(*col)) + width = len(col)//planes + greyscale = planes in (1,2) + alpha = planes in (2,4) + bitdepth = info['bitdepth'] + w = png.Writer(width, 1, + bitdepth=bitdepth, greyscale=greyscale, alpha=alpha) + w.write(out, [col]) + +def channel_reduce(col, planes): + """Attempt to reduce the number of channels in the set of + colours.""" + if planes >= 3: + def isgrey(c): + return c[0] == c[1] == c[2] + if min(map(isgrey, col)) == True: + # Every colour is grey. + col = set(map(lambda x: x[0::3], col)) + planes -= 2 + return col,planes + +def main(argv=None): + import sys + + if argv is None: + argv = sys.argv + + argv = argv[1:] + if len(argv) > 0: + f = open(argv[0], 'rb') + else: + f = sys.stdin + return colours(sys.stdout, f) + +if __name__ == '__main__': + main() diff --git a/build/pypng/pipcomposite b/build/pypng/pipcomposite new file mode 100644 index 0000000..21dd283 --- /dev/null +++ b/build/pypng/pipcomposite @@ -0,0 +1,121 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/pipcomposite $ +# $Rev: 208 $ +# pipcomposite +# Image alpha compositing. + +""" +pipcomposite [--background #rrggbb] file.png + +Composite an image onto a background and output the result. The +background colour is specified with an HTML-style triple (3, 6, or 12 +hex digits), and defaults to black (#000). + +The output PNG has no alpha channel. + +It is valid for the input to have no alpha channel, but it doesn't +make much sense: the output will equal the input. +""" + +import sys + +def composite(out, inp, background): + import png + + p = png.Reader(file=inp) + w,h,pixel,info = p.asRGBA() + + outinfo = dict(info) + outinfo['alpha'] = False + outinfo['planes'] -= 1 + outinfo['interlace'] = 0 + + # Convert to tuple and normalise to same range as source. + background = rgbhex(background) + maxval = float(2**info['bitdepth'] - 1) + background = map(lambda x: int(0.5 + x*maxval/65535.0), + background) + # Repeat background so that it's a whole row of sample values. + background *= w + + def iterrow(): + for row in pixel: + # Remove alpha from row, then create a list with one alpha + # entry _per channel value_. + # Squirrel the alpha channel away (and normalise it). + t = map(lambda x: x/maxval, row[3::4]) + row = list(row) + del row[3::4] + alpha = row[:] + for i in range(3): + alpha[i::3] = t + assert len(alpha) == len(row) == len(background) + yield map(lambda a,v,b: int(0.5 + a*v + (1.0-a)*b), + alpha, row, background) + + w = png.Writer(**outinfo) + w.write(out, iterrow()) + +def rgbhex(s): + """Take an HTML style string of the form "#rrggbb" and return a + colour (R,G,B) triple. Following the initial '#' there can be 3, 6, + or 12 digits (for 4-, 8- or 16- bits per channel). In all cases the + values are expanded to a full 16-bit range, so the returned values + are all in range(65536). + """ + + assert s[0] == '#' + s = s[1:] + assert len(s) in (3,6,12) + + # Create a target list of length 12, and expand the string s to make + # it length 12. + l = ['z']*12 + if len(s) == 3: + for i in range(4): + l[i::4] = s + if len(s) == 6: + for i in range(2): + l[i::4] = s[i::2] + l[i+2::4] = s[i::2] + if len(s) == 12: + l[:] = s + s = ''.join(l) + return map(lambda x: int(x, 16), (s[:4], s[4:8], s[8:])) + +class Usage(Exception): + pass + +def main(argv=None): + import getopt + import sys + + if argv is None: + argv = sys.argv + + argv = argv[1:] + + try: + try: + opt,arg = getopt.getopt(argv, '', + ['background=']) + except getopt.error, msg: + raise Usage(msg) + background = '#000' + for o,v in opt: + if o in ['--background']: + background = v + except Usage, err: + print >>sys.stderr, __doc__ + print >>sys.stderr, str(err) + return 2 + + if len(arg) > 0: + f = open(arg[0], 'rb') + else: + f = sys.stdin + return composite(sys.stdout, f, background) + + +if __name__ == '__main__': + main() diff --git a/build/pypng/pipdither b/build/pypng/pipdither new file mode 100644 index 0000000..c14c76c --- /dev/null +++ b/build/pypng/pipdither @@ -0,0 +1,181 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/pipdither $ +# $Rev: 150 $ + +# pipdither +# Error Diffusing image dithering. +# Now with serpentine scanning. + +# See http://www.efg2.com/Lab/Library/ImageProcessing/DHALF.TXT + +# http://www.python.org/doc/2.4.4/lib/module-bisect.html +from bisect import bisect_left + +import png + +def dither(out, inp, + bitdepth=1, linear=False, defaultgamma=1.0, targetgamma=None, + cutoff=0.75): + """Dither the input PNG `inp` into an image with a smaller bit depth + and write the result image onto `out`. `bitdepth` specifies the bit + depth of the new image. + + Normally the source image gamma is honoured (the image is + converted into a linear light space before being dithered), but + if the `linear` argument is true then the image is treated as + being linear already: no gamma conversion is done (this is + quicker, and if you don't care much about accuracy, it won't + matter much). + + Images with no gamma indication (no ``gAMA`` chunk) are normally + treated as linear (gamma = 1.0), but often it can be better + to assume a different gamma value: For example continuous tone + photographs intended for presentation on the web often carry + an implicit assumption of being encoded with a gamma of about + 0.45 (because that's what you get if you just "blat the pixels" + onto a PC framebuffer), so ``defaultgamma=0.45`` might be a + good idea. `defaultgamma` does not override a gamma value + specified in the file itself: It is only used when the file + does not specify a gamma. + + If you (pointlessly) specify both `linear` and `defaultgamma`, + `linear` wins. + + The gamma of the output image is, by default, the same as the input + image. The `targetgamma` argument can be used to specify a + different gamma for the output image. This effectively recodes the + image to a different gamma, dithering as we go. The gamma specified + is the exponent used to encode the output file (and appears in the + output PNG's ``gAMA`` chunk); it is usually less than 1. + + """ + + # Encoding is what happened when the PNG was made (and also what + # happens when we output the PNG). Decoding is what we do to the + # source PNG in order to process it. + + # The dithering algorithm is not completely general; it + # can only do bit depth reduction, not arbitrary palette changes. + import operator + maxval = 2**bitdepth - 1 + r = png.Reader(file=inp) + # If image gamma is 1 or gamma is not present and we are assuming a + # value of 1, then it is faster to pass a maxval parameter to + # asFloat (the multiplications get combined). With gamma, we have + # to have the pixel values from 0.0 to 1.0 (as long as we are doing + # gamma correction here). + # Slightly annoyingly, we don't know the image gamma until we've + # called asFloat(). + _,_,pixels,info = r.asDirect() + planes = info['planes'] + assert planes == 1 + width = info['size'][0] + sourcemaxval = 2**info['bitdepth'] - 1 + if linear: + gamma = 1 + else: + gamma = info.get('gamma') or defaultgamma + # Convert gamma from encoding gamma to the required power for + # decoding. + decode = 1.0/gamma + # Build a lookup table for decoding; convert from pixel values to linear + # space: + sourcef = 1.0/sourcemaxval + incode = map(sourcef.__mul__, range(sourcemaxval+1)) + if decode != 1.0: + incode = map(decode.__rpow__, incode) + # Could be different, later on. targetdecode is the assumed gamma + # that is going to be used to decoding the target PNG. It is the + # reciprocal of the exponent that we use to encode the target PNG. + # This is the value that we need to build our table that we use for + # converting from linear to target colour space. + if targetgamma is None: + targetdecode = decode + else: + targetdecode = 1.0/targetgamma + # The table we use for encoding (creating the target PNG), still + # maps from pixel value to linear space, but we use it inverted, by + # searching through it with bisect. + targetf = 1.0/maxval + outcode = map(targetf.__mul__, range(maxval+1)) + if targetdecode != 1.0: + outcode = map(targetdecode.__rpow__, outcode) + # The table used for choosing output codes. These values represent + # the cutoff points between two adjacent output codes. + choosecode = zip(outcode[1:], outcode) + p = cutoff + choosecode = map(lambda x: x[0]*p+x[1]*(1.0-p), choosecode) + def iterdither(): + # Errors diffused downwards (into next row) + ed = [0.0]*width + flipped = False + for row in pixels: + row = map(incode.__getitem__, row) + row = map(operator.add, ed, row) + if flipped: + row = row[::-1] + targetrow = [0] * width + for i,v in enumerate(row): + # Clamp. Necessary because previously added errors may take + # v out of range. + v = max(0.0, min(v, 1.0)) + # `it` will be the index of the chosen target colour; + it = bisect_left(choosecode, v) + t = outcode[it] + targetrow[i] = it + # err is the error that needs distributing. + err = v - t + # Sierra "Filter Lite" distributes * 2 + # as per this diagram. 1 1 + ef = err/2.0 + # :todo: consider making rows one wider at each end and + # removing "if"s + if i+1 < width: + row[i+1] += ef + ef /= 2.0 + ed[i] = ef + if i: + ed[i-1] += ef + if flipped: + ed = ed[::-1] + targetrow = targetrow[::-1] + yield targetrow + flipped = not flipped + info['bitdepth'] = bitdepth + info['gamma'] = 1.0/targetdecode + w = png.Writer(**info) + w.write(out, iterdither()) + + +def main(argv=None): + # http://www.python.org/doc/2.4.4/lib/module-getopt.html + from getopt import getopt + import sys + if argv is None: + argv = sys.argv + opt,argv = getopt(argv[1:], 'b:c:g:lo:') + k = {} + for o,v in opt: + if o == '-b': + k['bitdepth'] = int(v) + if o == '-c': + k['cutoff'] = float(v) + if o == '-g': + k['defaultgamma'] = float(v) + if o == '-l': + k['linear'] = True + if o == '-o': + k['targetgamma'] = float(v) + if o == '-?': + print >>sys.stderr, "pipdither [-b bits] [-c cutoff] [-g assumed-gamma] [-l] [in.png]" + + if len(argv) > 0: + f = open(argv[0], 'rb') + else: + f = sys.stdin + + return dither(sys.stdout, f, **k) + + +if __name__ == '__main__': + main() diff --git a/build/pypng/piprgb b/build/pypng/piprgb new file mode 100644 index 0000000..fbe1082 --- /dev/null +++ b/build/pypng/piprgb @@ -0,0 +1,36 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/piprgb $ +# $Rev: 131 $ +# piprgb +# +# Convert input image to RGB or RGBA format. Output will be colour type +# 2 or 6, and will not have a tRNS chunk. + +import png + +def rgb(out, inp): + """Convert to RGB/RGBA.""" + + r = png.Reader(file=inp) + r.preamble() + if r.alpha or r.trns: + get = r.asRGBA + else: + get = r.asRGB + pixels,info = get()[2:4] + w = png.Writer(**info) + w.write(out, pixels) + +def main(argv=None): + import sys + + if argv is None: + argv = sys.argv + if len(argv) > 1: + f = open(argv[1], 'rb') + else: + f = sys.stdin + return rgb(sys.stdout, f) + +if __name__ == '__main__': + main() diff --git a/build/pypng/pipscalez b/build/pypng/pipscalez new file mode 100644 index 0000000..c60762d --- /dev/null +++ b/build/pypng/pipscalez @@ -0,0 +1,53 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/pipscalez $ +# $Rev: 131 $ + +# pipscalez +# Enlarge an image by an integer factor horizontally and vertically. + +def rescale(inp, out, xf, yf): + from array import array + import png + + r = png.Reader(file=inp) + _,_,pixels,meta = r.asDirect() + typecode = 'BH'[meta['bitdepth'] > 8] + planes = meta['planes'] + # We are going to use meta in the call to Writer, so expand the + # size. + x,y = meta['size'] + x *= xf + y *= yf + meta['size'] = (x,y) + del x + del y + # Values per row, target row. + vpr = meta['size'][0] * planes + def iterscale(): + for row in pixels: + bigrow = array(typecode, [0]*vpr) + row = array(typecode, row) + for c in range(planes): + channel = row[c::planes] + for i in range(xf): + bigrow[i*planes+c::xf*planes] = channel + for _ in range(yf): + yield bigrow + w = png.Writer(**meta) + w.write(out, iterscale()) + + +def main(argv=None): + import sys + + if argv is None: + argv = sys.argv + xf = int(argv[1]) + if len(argv) > 2: + yf = int(argv[2]) + else: + yf = xf + return rescale(sys.stdin, sys.stdout, xf, yf) + +if __name__ == '__main__': + main() diff --git a/build/pypng/pipstack b/build/pypng/pipstack new file mode 100644 index 0000000..5523670 --- /dev/null +++ b/build/pypng/pipstack @@ -0,0 +1,127 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/pipstack $ +# $Rev: 190 $ + +# pipstack +# Combine input PNG files into a multi-channel output PNG. + +""" +pipstack file1.png [file2.png ...] + +pipstack can be used to combine 3 greyscale PNG files into a colour, RGB, +PNG file. In fact it is slightly more general than that. The number of +channels in the output PNG is equal to the sum of the numbers of +channels in the input images. It is an error if this sum exceeds 4 (the +maximum number of channels in a PNG image is 4, for an RGBA image). The +output colour model corresponds to the number of channels: 1 - +greyscale; 2 - greyscale+alpha; 3 - RGB; 4 - RGB+alpha. + +In this way it is possible to combine 3 greyscale PNG files into an RGB +PNG (a common expected use) as well as more esoteric options: rgb.png + +grey.png = rgba.png; grey.png + grey.png = greyalpha.png. + +Color Profile, Gamma, and so on. + +[This is not implemented yet] + +If an input has an ICC Profile (``iCCP`` chunk) then the output will +have an ICC Profile, but only if it is possible to combine all the input +ICC Profiles. It is possible to combine all the input ICC Profiles +only when: they all use the same Profile Connection Space; the PCS white +point is the same (specified in the header; should always be D50); +possibly some other things I haven't thought of yet. + +If some of the inputs have a ``gAMA`` chunk (specifying gamma) and +an output ICC Profile is being generated, then the gamma information +will be incorporated into the ICC Profile. + +When the output is an RGB colour type and the output ICC Profile is +synthesized, it is necessary to supply colorant tags (``rXYZ`` and so +on). These are taken from ``sRGB``. + +If the input images have ``gAMA`` chunks and no input image has an ICC +Profile then the output image will have a ``gAMA`` chunk, but only if +all the ``gAMA`` chunks specify the same value. Otherwise a warning +will be emitted and no ``gAMA`` chunk. It is possible to add or replace +a ``gAMA`` chunk using the ``pipchunk`` tool. + +gAMA, pHYs, iCCP, sRGB, tIME, any other chunks. +""" + +class Error(Exception): + pass + +def stack(out, inp): + """Stack the input PNG files into a single output PNG.""" + + from array import array + import itertools + # Local module + import png + + if len(inp) < 1: + raise Error("Required input is missing.") + + l = map(png.Reader, inp) + # Let data be a list of (pixel,info) pairs. + data = map(lambda p: p.asDirect()[2:], l) + totalchannels = sum(map(lambda x: x[1]['planes'], data)) + + if not (0 < totalchannels <= 4): + raise Error("Too many channels in input.") + alpha = totalchannels in (2,4) + greyscale = totalchannels in (1,2) + bitdepth = [] + for b in map(lambda x: x[1]['bitdepth'], data): + try: + if b == int(b): + bitdepth.append(b) + continue + except (TypeError, ValueError): + pass + # Assume a tuple. + bitdepth += b + # Currently, fail unless all bitdepths equal. + if len(set(bitdepth)) > 1: + raise NotImplemented("Cannot cope when bitdepths differ - sorry!") + bitdepth = bitdepth[0] + arraytype = 'BH'[bitdepth > 8] + size = map(lambda x: x[1]['size'], data) + # Currently, fail unless all images same size. + if len(set(size)) > 1: + raise NotImplemented("Cannot cope when sizes differ - sorry!") + size = size[0] + # Values per row + vpr = totalchannels * size[0] + def iterstack(): + # the izip call creates an iterator that yields the next row + # from all the input images combined into a tuple. + for irow in itertools.izip(*map(lambda x: x[0], data)): + row = array(arraytype, [0]*vpr) + # output channel + och = 0 + for i,arow in enumerate(irow): + # ensure incoming row is an array + arow = array(arraytype, arow) + n = data[i][1]['planes'] + for j in range(n): + row[och::totalchannels] = arow[j::n] + och += 1 + yield row + w = png.Writer(size[0], size[1], + greyscale=greyscale, alpha=alpha, bitdepth=bitdepth) + w.write(out, iterstack()) + + +def main(argv=None): + import sys + + if argv is None: + argv = sys.argv + argv = argv[1:] + arg = argv[:] + return stack(sys.stdout, arg) + + +if __name__ == '__main__': + main() diff --git a/build/pypng/pipwindow b/build/pypng/pipwindow new file mode 100644 index 0000000..2f8c7a2 --- /dev/null +++ b/build/pypng/pipwindow @@ -0,0 +1,67 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/pipwindow $ +# $Rev: 173 $ + +# pipwindow +# Tool to crop/expand an image to a rectangular window. Come the +# revolution this tool will allow the image and the window to be placed +# arbitrarily (in particular the window can be bigger than the picture +# and/or overlap it only partially) and the image can be OpenGL style +# border/repeat effects (repeat, mirrored repeat, clamp, fixed +# background colour, background colour from source file). For now it +# only acts as crop. The window must be no greater than the image in +# both x and y. + +def window(tl, br, inp, out): + """Place a window onto the image and cut-out the resulting + rectangle. The window is an axis aligned rectangle opposite corners + at *tl* and *br* (each being an (x,y) pair). *inp* specifies the + input file which should be a PNG image. + """ + + import png + + r = png.Reader(file=inp) + x,y,pixels,meta = r.asDirect() + if not (0 <= tl[0] < br[0] <= x): + raise NotImplementedError() + if not (0 <= tl[1] < br[1] <= y): + raise NotImplementedError() + # Compute left and right bounds for each row + l = tl[0] * meta['planes'] + r = br[0] * meta['planes'] + def itercrop(): + """An iterator to perform the crop.""" + + for i,row in enumerate(pixels): + if i < tl[1]: + continue + if i >= br[1]: + # Same as "raise StopIteration" + return + yield row[l:r] + meta['size'] = (br[0]-tl[0], br[1]-tl[1]) + w = png.Writer(**meta) + w.write(out, itercrop()) + +def main(argv=None): + import sys + + if argv is None: + argv = sys.argv + argv = argv[1:] + + tl = (0,0) + br = tuple(map(int, argv[:2])) + if len(argv) >= 4: + tl = br + br = tuple(map(int, argv[2:4])) + if len(argv) in (2, 4): + f = sys.stdin + else: + f = open(argv[-1], 'rb') + + return window(tl, br, f, sys.stdout) + +if __name__ == '__main__': + main() diff --git a/build/pypng/plan9topng.py b/build/pypng/plan9topng.py new file mode 100644 index 0000000..4600b4c --- /dev/null +++ b/build/pypng/plan9topng.py @@ -0,0 +1,293 @@ +#!/usr/bin/env python +# $Rev: 184 $ +# $URL: http://pypng.googlecode.com/svn/trunk/code/plan9topng.py $ + +# Imported from //depot/prj/plan9topam/master/code/plan9topam.py#4 on +# 2009-06-15. + +"""Command line tool to convert from Plan 9 image format to PNG format. + +Plan 9 image format description: +http://plan9.bell-labs.com/magic/man2html/6/image +""" + +# http://www.python.org/doc/2.3.5/lib/module-itertools.html +import itertools +# http://www.python.org/doc/2.3.5/lib/module-re.html +import re +# http://www.python.org/doc/2.3.5/lib/module-sys.html +import sys + +def block(s, n): + # See http://www.python.org/doc/2.6.2/library/functions.html#zip + return zip(*[iter(s)]*n) + +def convert(f, output=sys.stdout) : + """Convert Plan 9 file to PNG format. Works with either uncompressed + or compressed files. + """ + + r = f.read(11) + if r == 'compressed\n' : + png(output, *decompress(f)) + else : + png(output, *glue(f, r)) + + +def glue(f, r) : + """Return (metadata, stream) pair where `r` is the initial portion of + the metadata that has already been read from the stream `f`. + """ + + r = r + f.read(60-len(r)) + return (r, f) + +def meta(r) : + """Convert 60 character string `r`, the metadata from an image file. + Returns a 5-tuple (*chan*,*minx*,*miny*,*limx*,*limy*). 5-tuples may + settle into lists in transit. + + As per http://plan9.bell-labs.com/magic/man2html/6/image the metadata + comprises 5 words separated by blanks. As it happens each word starts + at an index that is a multiple of 12, but this routine does not care + about that.""" + + r = r.split() + # :todo: raise FormatError + assert len(r) == 5 + r = [r[0]] + map(int, r[1:]) + return r + +def bitdepthof(pixel) : + """Return the bitdepth for a Plan9 pixel format string.""" + + maxd = 0 + for c in re.findall(r'[a-z]\d*', pixel) : + if c[0] != 'x': + maxd = max(maxd, int(c[1:])) + return maxd + +def maxvalof(pixel): + """Return the netpbm MAXVAL for a Plan9 pixel format string.""" + + bitdepth = bitdepthof(pixel) + return (2**bitdepth)-1 + +def pixmeta(metadata, f) : + """Convert (uncompressed) Plan 9 image file to pair of (*metadata*, + *pixels*). This is intended to be used by PyPNG format. *metadata* + is the metadata returned in a dictionary, *pixels* is an iterator that + yields each row in boxed row flat pixel format. + + `f`, the input file, should be cued up to the start of the image data. + """ + + chan,minx,miny,limx,limy = metadata + rows = limy - miny + width = limx - minx + nchans = len(re.findall('[a-wyz]', chan)) + alpha = 'a' in chan + # Iverson's convention for the win! + ncolour = nchans - alpha + greyscale = ncolour == 1 + bitdepth = bitdepthof(chan) + maxval = 2**bitdepth - 1 + # PNG style metadata + meta=dict(size=(width,rows), bitdepth=bitdepthof(chan), + greyscale=greyscale, alpha=alpha, planes=nchans) + + return itertools.imap(lambda x: itertools.chain(*x), + block(unpack(f, rows, width, chan, maxval), width)), meta + +def png(out, metadata, f): + """Convert to PNG format. `metadata` should be a Plan9 5-tuple; `f` + the input file (see :meth:`pixmeta`). + """ + + import png + + pixels,meta = pixmeta(metadata, f) + p = png.Writer(**meta) + p.write(out, pixels) + +def spam(): + """Not really spam, but old PAM code, which is in limbo.""" + + if nchans == 3 or nchans == 1 : + # PGM (P5) or PPM (P6) format. + output.write('P%d\n%d %d %d\n' % (5+(nchans==3), width, rows, maxval)) + else : + # PAM format. + output.write("""P7 +WIDTH %d +HEIGHT %d +DEPTH %d +MAXVAL %d +""" % (width, rows, nchans, maxval)) + +def unpack(f, rows, width, pixel, maxval) : + """Unpack `f` into pixels. Assumes the pixel format is such that the depth + is either a multiple or a divisor of 8. + `f` is assumed to be an iterator that returns blocks of input such + that each block contains a whole number of pixels. An iterator is + returned that yields each pixel as an n-tuple. `pixel` describes the + pixel format using the Plan9 syntax ("k8", "r8g8b8", and so on). + """ + + def mask(w) : + """An integer, to be used as a mask, with bottom `w` bits set to 1.""" + + return (1 << w)-1 + + def deblock(f, depth, width) : + """A "packer" used to convert multiple bytes into single pixels. + `depth` is the pixel depth in bits (>= 8), `width` is the row width in + pixels. + """ + + w = depth // 8 + i = 0 + for block in f : + for i in range(len(block)//w) : + p = block[w*i:w*(i+1)] + i += w + # Convert p to little-endian integer, x + x = 0 + s = 1 # scale + for j in p : + x += s * ord(j) + s <<= 8 + yield x + + def bitfunge(f, depth, width) : + """A "packer" used to convert single bytes into multiple pixels. + Depth is the pixel depth (< 8), width is the row width in pixels. + """ + + for block in f : + col = 0 + for i in block : + x = ord(i) + for j in range(8/depth) : + yield x >> (8 - depth) + col += 1 + if col == width : + # A row-end forces a new byte even if we haven't consumed + # all of the current byte. Effectively rows are bit-padded + # to make a whole number of bytes. + col = 0 + break + x <<= depth + + # number of bits in each channel + chan = map(int, re.findall(r'\d+', pixel)) + # type of each channel + type = re.findall('[a-z]', pixel) + + depth = sum(chan) + + # According to the value of depth pick a "packer" that either gathers + # multiple bytes into a single pixel (for depth >= 8) or split bytes + # into several pixels (for depth < 8) + if depth >= 8 : + # + assert depth % 8 == 0 + packer = deblock + else : + assert 8 % depth == 0 + packer = bitfunge + + for x in packer(f, depth, width) : + # x is the pixel as an unsigned integer + o = [] + # This is a bit yucky. Extract each channel from the _most_ + # significant part of x. + for j in range(len(chan)) : + v = (x >> (depth - chan[j])) & mask(chan[j]) + x <<= chan[j] + if type[j] != 'x' : + # scale to maxval + v = v * float(maxval) / mask(chan[j]) + v = int(v+0.5) + o.append(v) + yield o + + +def decompress(f) : + """Decompress a Plan 9 image file. Assumes f is already cued past the + initial 'compressed\n' string. + """ + + r = meta(f.read(60)) + return r, decomprest(f, r[4]) + + +def decomprest(f, rows) : + """Iterator that decompresses the rest of a file once the metadata + have been consumed.""" + + row = 0 + while row < rows : + row,o = deblock(f) + yield o + + +def deblock(f) : + """Decompress a single block from a compressed Plan 9 image file. + Each block starts with 2 decimal strings of 12 bytes each. Yields a + sequence of (row, data) pairs where row is the total number of rows + processed according to the file format and data is the decompressed + data for a set of rows.""" + + row = int(f.read(12)) + size = int(f.read(12)) + if not (0 <= size <= 6000) : + raise 'block has invalid size; not a Plan 9 image file?' + + # Since each block is at most 6000 bytes we may as well read it all in + # one go. + d = f.read(size) + i = 0 + o = [] + + while i < size : + x = ord(d[i]) + i += 1 + if x & 0x80 : + x = (x & 0x7f) + 1 + lit = d[i:i+x] + i += x + o.extend(lit) + continue + # x's high-order bit is 0 + l = (x >> 2) + 3 + # Offset is made from bottom 2 bits of x and all 8 bits of next + # byte. http://plan9.bell-labs.com/magic/man2html/6/image doesn't + # say whether x's 2 bits are most signiificant or least significant. + # But it is clear from inspecting a random file, + # http://plan9.bell-labs.com/sources/plan9/sys/games/lib/sokoban/images/cargo.bit + # that x's 2 bit are most significant. + # + offset = (x & 3) << 8 + offset |= ord(d[i]) + i += 1 + # Note: complement operator neatly maps (0 to 1023) to (-1 to + # -1024). Adding len(o) gives a (non-negative) offset into o from + # which to start indexing. + offset = ~offset + len(o) + if offset < 0 : + raise 'byte offset indexes off the begininning of the output buffer; not a Plan 9 image file?' + for j in range(l) : + o.append(o[offset+j]) + return row,''.join(o) + +def main(argv=None) : + if argv is None : + argv = sys.argv + if len(sys.argv) <= 1 : + return convert(sys.stdin) + else : + return convert(open(argv[1], 'rb')) + +if __name__ == '__main__' : + sys.exit(main()) diff --git a/build/pypng/pngchunk b/build/pypng/pngchunk new file mode 100644 index 0000000..b00e4b1 --- /dev/null +++ b/build/pypng/pngchunk @@ -0,0 +1,172 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/pngchunk $ +# $Rev: 156 $ +# pngchunk +# Chunk editing/extraction tool. + +import struct +import warnings + +# Local module. +import png + +""" +pngchunk [--gamma g] [--iccprofile file] [--sigbit b] [-c cHNK!] [-c cHNK:foo] [-c cHNKI', v) + elif t == 'sigbit': + t = 'sBIT' + try: + v[0] + except TypeError: + v = (v,) + v = struct.pack('%dB' % len(v), *v) + elif t == 'iccprofile': + t = 'iCCP' + # http://www.w3.org/TR/PNG/#11iCCP + v = 'a color profile\x00\x00' + v.encode('zip') + else: + warnings.warn('Unknown chunk type %r' % t) + return t[:4],v + + l = map(canonical, l) + # Some chunks automagically replace ones that are present in the + # source PNG. There can only be one of each of these chunk types. + # Create a 'replace' dictionary to record these chunks. + add = [] + delete = set() + replacing = set(['gAMA', 'sBIT', 'PLTE', 'tRNS', 'sPLT', 'IHDR']) + replace = dict() + for t,v in l: + if v is None: + delete.add(t) + elif t in replacing: + replace[t] = v + else: + add.append((t,v)) + del l + r = png.Reader(file=inp) + chunks = r.chunks() + def iterchunks(): + for t,v in chunks: + if t in delete: + continue + if t in replace: + yield t,replace[t] + del replace[t] + continue + if t == 'IDAT' and replace: + # Insert into the output any chunks that are on the + # replace list. We haven't output them yet, because we + # didn't see an original chunk of the same type to + # replace. Thus the "replace" is actually an "insert". + for u,w in replace.items(): + yield u,w + del replace[u] + if t == 'IDAT' and add: + for item in add: + yield item + del add[:] + yield t,v + return png.write_chunks(out, iterchunks()) + +class Usage(Exception): + pass + +def main(argv=None): + import getopt + import re + import sys + + if argv is None: + argv = sys.argv + + argv = argv[1:] + + try: + try: + opt,arg = getopt.getopt(argv, 'c:', + ['gamma=', 'iccprofile=', 'sigbit=']) + except getopt.error, msg: + raise Usage(msg) + k = [] + for o,v in opt: + if o in ['--gamma']: + k.append(('gamma', float(v))) + if o in ['--sigbit']: + k.append(('sigbit', int(v))) + if o in ['--iccprofile']: + k.append(('iccprofile', open(v, 'rb').read())) + if o in ['-c']: + type = v[:4] + if not re.match('[a-zA-Z]{4}', type): + raise Usage('Chunk type must consist of 4 letters.') + if v[4] == '!': + k.append((type, None)) + if v[4] == ':': + k.append((type, v[5:])) + if v[4] == '<': + k.append((type, open(v[5:], 'rb').read())) + except Usage, err: + print >>sys.stderr, ( + "usage: pngchunk [--gamma d.dd] [--sigbit b] [-c cHNK! | -c cHNK:text-string]") + print >>sys.stderr, err.message + return 2 + + if len(arg) > 0: + f = open(arg[0], 'rb') + else: + f = sys.stdin + return chunk(sys.stdout, f, k) + + +if __name__ == '__main__': + main() diff --git a/build/pypng/pnghist b/build/pypng/pnghist new file mode 100644 index 0000000..4fbbd0a --- /dev/null +++ b/build/pypng/pnghist @@ -0,0 +1,79 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/pnghist $ +# $Rev: 153 $ +# PNG Histogram +# Only really works on grayscale images. + +from array import array +import getopt + +import png + +def decidemax(level): + """Given an array of levels, decide the maximum value to use for the + histogram. This is normally chosen to be a bit bigger than the 99th + percentile, but if the 100th percentile is not much more (within a + factor of 2) then the 100th percentile is chosen. + """ + + truemax = max(level) + sl = level[:] + sl.sort(reverse=True) + i99 = int(round(len(level)*0.01)) + if truemax <= 2*sl[i99]: + return truemax + return 1.05*sl[i99] + +def hist(out, inp, verbose=None): + """Open the PNG file `inp` and generate a histogram.""" + + r = png.Reader(file=inp) + x,y,pixels,info = r.asDirect() + bitdepth = info['bitdepth'] + level = [0]*2**bitdepth + for row in pixels: + for v in row: + level[v] += 1 + maxlevel = decidemax(level) + + h = 100 + outbitdepth = 8 + outmaxval = 2**outbitdepth - 1 + def genrow(): + for y in range(h): + y = h-y-1 + # :todo: vary typecode according to outbitdepth + row = array('B', [0]*len(level)) + fl = y*maxlevel/float(h) + ce = (y+1)*maxlevel/float(h) + for x in range(len(row)): + if level[x] <= fl: + # Relies on row being initialised to all 0 + continue + if level[x] >= ce: + row[x] = outmaxval + continue + frac = (level[x] - fl)/(ce - fl) + row[x] = int(round(outmaxval*frac)) + yield row + w = png.Writer(len(level), h, gamma=1.0, + greyscale=True, alpha=False, bitdepth=outbitdepth) + w.write(out, genrow()) + if verbose: print >>verbose, level + +def main(argv=None): + import sys + + if argv is None: + argv = sys.argv + argv = argv[1:] + opt,arg = getopt.getopt(argv, '') + + if len(arg) < 1: + f = sys.stdin + else: + f = open(arg[0]) + hist(sys.stdout, f) + +if __name__ == '__main__': + main() diff --git a/build/pypng/pnglsch b/build/pypng/pnglsch new file mode 100644 index 0000000..d10d238 --- /dev/null +++ b/build/pypng/pnglsch @@ -0,0 +1,31 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/pnglsch $ +# $Rev: 107 $ +# pnglsch +# PNG List Chunks + +import png + +def list(out, inp): + r = png.Reader(file=inp) + for t,v in r.chunks(): + add = '' + if len(v) <= 28: + add = ' ' + v.encode('hex') + print >>out, "%s %10d%s" % (t, len(v), add) + +def main(argv=None): + import sys + + if argv is None: + argv = sys.argv + arg = argv[1:] + + if len(arg) > 0: + f = open(arg[0], 'rb') + else: + f = sys.stdin + return list(sys.stdout, f) + +if __name__ == '__main__': + main() diff --git a/build/pypng/texttopng b/build/pypng/texttopng new file mode 100644 index 0000000..ab0c690 --- /dev/null +++ b/build/pypng/texttopng @@ -0,0 +1,151 @@ +#!/usr/bin/env python +# $URL: http://pypng.googlecode.com/svn/trunk/code/texttopng $ +# $Rev: 132 $ +# Script to renders text as a PNG image. + +from array import array +import itertools + +font = { + 32: '0000000000000000', + 33: '0010101010001000', + 34: '0028280000000000', + 35: '0000287c287c2800', + 36: '00103c5038147810', + 37: '0000644810244c00', + 38: '0020502054483400', + 39: '0010100000000000', + 40: '0008101010101008', + 41: '0020101010101020', + 42: '0010543838541000', + 43: '000010107c101000', + 44: '0000000000301020', + 45: '000000007c000000', + 46: '0000000000303000', + 47: '0000040810204000', + 48: '0038445454443800', + 49: '0008180808080800', + 50: '0038043840407c00', + 51: '003c041804043800', + 52: '00081828487c0800', + 53: '0078407804047800', + 54: '0038407844443800', + 55: '007c040810101000', + 56: '0038443844443800', + 57: '0038443c04040400', + 58: '0000303000303000', + 59: '0000303000301020', + 60: '0004081020100804', + 61: '0000007c007c0000', + 62: '0040201008102040', + 63: '0038440810001000', + 64: '00384c545c403800', + 65: '0038447c44444400', + 66: '0078447844447800', + 67: '0038444040443800', + 68: '0070484444487000', + 69: '007c407840407c00', + 70: '007c407840404000', + 71: '003844405c443c00', + 72: '0044447c44444400', + 73: '0038101010103800', + 74: '003c040404443800', + 75: '0044487048444400', + 76: '0040404040407c00', + 77: '006c545444444400', + 78: '004464544c444400', + 79: '0038444444443800', + 80: '0078447840404000', + 81: '0038444444443c02', + 82: '0078447844444400', + 83: '0038403804047800', + 84: '007c101010101000', + 85: '0044444444443c00', + 86: '0044444444281000', + 87: '0044445454543800', + 88: '0042241818244200', + 89: '0044443810101000', + 90: '007c081020407c00', + 91: '0038202020202038', + 92: '0000402010080400', + 93: '0038080808080838', + 94: '0010284400000000', + 95: '000000000000fe00', + 96: '0040200000000000', + 97: '000038043c443c00', + 98: '0040784444447800', + 99: '0000384040403800', + 100: '00043c4444443c00', + 101: '000038447c403c00', + 102: '0018203820202000', + 103: '00003c44443c0438', + 104: '0040784444444400', + 105: '0010003010101000', + 106: '0010003010101020', + 107: '0040404870484400', + 108: '0030101010101000', + 109: '0000385454444400', + 110: '0000784444444400', + 111: '0000384444443800', + 112: '0000784444784040', + 113: '00003c44443c0406', + 114: '00001c2020202000', + 115: '00003c4038047800', + 116: '0020203820201800', + 117: '0000444444443c00', + 118: '0000444444281000', + 119: '0000444454543800', + 120: '0000442810284400', + 121: '00004444443c0438', + 122: '00007c0810207c00', + 123: '0018202060202018', + 124: '0010101000101010', + 125: '003008080c080830', + 126: '0020540800000000', +} + +def char(i): + """Get image data for the character `i` (a one character string). + Returned as a list of rows. Each row is a tuple containing the + packed pixels. + """ + + i = ord(i) + if i not in font: + return [(0,)]*8 + return map(lambda row: (ord(row),), font[i].decode('hex')) + +def texttoraster(m): + """Convert string *m* to a raster image (by rendering it using the + font in *font*). A triple of (*width*, *height*, *pixels*) is + returned; *pixels* is in boxed row packed pixel format. + """ + + # Assumes monospaced font. + x = 8*len(m) + y = 8 + return x,y,itertools.imap(lambda row: itertools.chain(*row), + zip(*map(char, m))) + + +def render(message, out): + import png + + x,y,pixels = texttoraster(message) + w = png.Writer(x, y, greyscale=True, bitdepth=1) + w.write_packed(out, pixels) + out.flush() + +def main(argv=None): + import sys + + if argv is None: + argv = sys.argv + if len(argv) > 1: + message = argv[1] + else: + message = sys.stdin.read() + render(message, sys.stdout) + +if __name__ == '__main__': + main() -- cgit v1.2.3