node_modules/node-firefox-forward-ports/node_modules/adbkit/lib/adb/command/host-transport/framebuffer.js

(function() {
  var Assert, Command, FrameBufferCommand, Protocol, RgbTransform, debug, spawn,
    __hasProp = {}.hasOwnProperty,
    __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; };

  Assert = require('assert');

  spawn = require('child_process').spawn;

  debug = require('debug')('adb:command:framebuffer');

  Command = require('../../command');

  Protocol = require('../../protocol');

  RgbTransform = require('../../framebuffer/rgbtransform');

  FrameBufferCommand = (function(_super) {
    __extends(FrameBufferCommand, _super);

    function FrameBufferCommand() {
      return FrameBufferCommand.__super__.constructor.apply(this, arguments);
    }

    FrameBufferCommand.prototype.execute = function(format) {
      this._send('framebuffer:');
      return this.parser.readAscii(4).then((function(_this) {
        return function(reply) {
          switch (reply) {
            case Protocol.OKAY:
              return _this.parser.readBytes(52).then(function(header) {
                var meta, stream;
                meta = _this._parseHeader(header);
                switch (format) {
                  case 'raw':
                    stream = _this.parser.raw();
                    stream.meta = meta;
                    return stream;
                  default:
                    stream = _this._convert(meta);
                    stream.meta = meta;
                    return stream;
                }
              });
            case Protocol.FAIL:
              return _this.parser.readError();
            default:
              return _this.parser.unexpected(reply, 'OKAY or FAIL');
          }
        };
      })(this));
    };

    FrameBufferCommand.prototype._convert = function(meta, format, raw) {
      var proc, transform;
      debug("Converting raw framebuffer stream into " + (format.toUpperCase()));
      switch (meta.format) {
        case 'rgb':
        case 'rgba':
          break;
        default:
          debug("Silently transforming '" + meta.format + "' into 'rgb' for `gm`");
          transform = new RgbTransform(meta);
          meta.format = 'rgb';
          raw = this.parser.raw().pipe(transform);
      }
      proc = spawn('gm', ['convert', '-size', "" + meta.width + "x" + meta.height, "" + meta.format + ":-", "" + format + ":-"]);
      raw.pipe(proc.stdin);
      return proc.stdout;
    };

    FrameBufferCommand.prototype._parseHeader = function(header) {
      var meta, offset;
      meta = {};
      offset = 0;
      meta.version = header.readUInt32LE(offset);
      if (meta.version === 16) {
        throw new Error('Old-style raw images are not supported');
      }
      offset += 4;
      meta.bpp = header.readUInt32LE(offset);
      offset += 4;
      meta.size = header.readUInt32LE(offset);
      offset += 4;
      meta.width = header.readUInt32LE(offset);
      offset += 4;
      meta.height = header.readUInt32LE(offset);
      offset += 4;
      meta.red_offset = header.readUInt32LE(offset);
      offset += 4;
      meta.red_length = header.readUInt32LE(offset);
      offset += 4;
      meta.blue_offset = header.readUInt32LE(offset);
      offset += 4;
      meta.blue_length = header.readUInt32LE(offset);
      offset += 4;
      meta.green_offset = header.readUInt32LE(offset);
      offset += 4;
      meta.green_length = header.readUInt32LE(offset);
      offset += 4;
      meta.alpha_offset = header.readUInt32LE(offset);
      offset += 4;
      meta.alpha_length = header.readUInt32LE(offset);
      meta.format = meta.blue_offset === 0 ? 'bgr' : 'rgb';
      if (meta.bpp === 32 || meta.alpha_length) {
        meta.format += 'a';
      }
      return meta;
    };

    return FrameBufferCommand;

  })(Command);

  module.exports = FrameBufferCommand;

}).call(this);