build/appini_header.py
author Alexis Beingessner <a.beingessner@gmail.com>
Mon, 19 Jun 2017 10:58:28 -0400
changeset 424982 564959d26e8db243ded3d57380842620e60e89e7
parent 370735 a0e38abdcdd86d611d979dd7b64654da1f455494
child 436572 6074db12d685655fe5692d59471b3c32cc967dc9
permissions -rw-r--r--
Bug 1357545 - handle text-shadows/decorations with webrender (layers-free) r=jrmuizel This replaces our DrawTargetCapture hack with a similar but more powerful TextDrawTarget hack. The old design had several limitations: * It couldn't handle shadows * It couldn't handle selections * It couldn't handle font/color changes in a single text-run * It couldn't handle decorations (underline, overline, line-through) Mostly this was a consequence of the fact that it only modified the start and end of the rendering algorithm, and therefore couldn't distinguish draw calls for different parts of the text. This new design is based on a similar principle as DrawTargetCapture, but also passes down the TextDrawTarget in the drawing arguments, so that the drawing algorithm can notify us of changes in phase (e.g. "now we're doing underlines"). This also lets us directly pass data to TextDrawTarget when possible (as is done for shadows and selections). In doing this, I also improved the logic copied from ContainsOnlyColoredGlyphs to handle changes in font/color mid-text-run (which can happen because of font fallback). The end result is: * We handle all shadows natively * We handle all selections natively * We handle all decorations natively * We handle font/color changes in a single text-run * Although we still hackily intercept draw calls * But we don't need to buffer commands, reducing total memcopies In addition, this change integrates webrender's PushTextShadow and PushLine APIs, which were designed for this use case. This is only done in the layerless path; WebrenderTextLayer continues to be semantically limited, as we aren't actively maintaining non-layers-free webrender anymore. This also doesn't modify TextLayers, to minimize churn. In theory they can be augmented to support the richer semantics that TextDrawTarget has, but there's little motivation since the API is largely unused with this change. MozReview-Commit-ID: 4IjTsSW335h

# 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/.

'''Parses a given application.ini file and outputs the corresponding
   StaticXREAppData structure as a C++ header file'''

import ConfigParser
import sys

def main(output, file):
    config = ConfigParser.RawConfigParser()
    config.read(file)
    flags = set()
    try:
        if config.getint('XRE', 'EnableProfileMigrator') == 1:
            flags.add('NS_XRE_ENABLE_PROFILE_MIGRATOR')
    except: pass
    try:
        if config.getint('Crash Reporter', 'Enabled') == 1:
            flags.add('NS_XRE_ENABLE_CRASH_REPORTER')
    except: pass
    appdata = dict(("%s:%s" % (s, o), config.get(s, o)) for s in config.sections() for o in config.options(s))
    appdata['flags'] = ' | '.join(flags) if flags else '0'
    appdata['App:profile'] = '"%s"' % appdata['App:profile'] if 'App:profile' in appdata else 'NULL'
    expected = ('App:vendor', 'App:name', 'App:remotingname', 'App:version', 'App:buildid',
                'App:id', 'Gecko:minversion', 'Gecko:maxversion')
    missing = [var for var in expected if var not in appdata]
    if missing:
        print >>sys.stderr, \
            "Missing values in %s: %s" % (file, ', '.join(missing))
        sys.exit(1)

    if not 'Crash Reporter:serverurl' in appdata:
        appdata['Crash Reporter:serverurl'] = ''

    output.write('''#include "mozilla/XREAppData.h"
             static const mozilla::StaticXREAppData sAppData = {
                 "%(App:vendor)s",
                 "%(App:name)s",
                 "%(App:remotingname)s",
                 "%(App:version)s",
                 "%(App:buildid)s",
                 "%(App:id)s",
                 NULL, // copyright
                 %(flags)s,
                 "%(Gecko:minversion)s",
                 "%(Gecko:maxversion)s",
                 "%(Crash Reporter:serverurl)s",
                 %(App:profile)s
             };''' % appdata)

if __name__ == '__main__':
    if len(sys.argv) != 1:
        main(sys.stdout, sys.argv[1])
    else:
        print >>sys.stderr, "Usage: %s /path/to/application.ini" % sys.argv[0]