94 lines
3.1 KiB
C#
94 lines
3.1 KiB
C#
//
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// FlashBaseDataFormat.cs
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//
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// Author:
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// Michael Becker <alcexhim@gmail.com>
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//
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// Copyright (c) 2020 Mike Becker's Software
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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using System;
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using MBS.Framework.Drawing;
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using UniversalEditor.IO;
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namespace UniversalEditor.Plugins.Adobe.Flash.Base
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{
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public class FlashBaseDataFormat : DataFormat
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{
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private static DataFormatReference _dfr;
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protected override DataFormatReference MakeReferenceInternal()
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{
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if (_dfr == null)
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{
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_dfr = base.MakeReferenceInternal();
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_dfr.Capabilities.Add(typeof(FlashBaseObjectModel), DataFormatCapabilities.All);
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}
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return _dfr;
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}
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public bool Compressed { get; set; } = false;
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public byte FormatVersion { get; set; } = 5;
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protected override void LoadInternal(ref ObjectModel objectModel)
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{
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FlashBaseObjectModel swf = (objectModel as FlashBaseObjectModel);
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if (swf == null)
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throw new ObjectModelNotSupportedException();
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Reader reader = Accessor.Reader;
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string signature = reader.ReadFixedLengthString(3);
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if (signature == "CWS")
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{
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Compressed = true;
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}
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else if (signature == "FWS")
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{
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Compressed = false;
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}
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else
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{
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throw new InvalidDataFormatException("file does not begin with 'CWS' (compressed) or 'FWS' (uncompressed)");
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}
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FormatVersion = reader.ReadByte();
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uint totalFileLength = reader.ReadUInt32();
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Rectangle frameSize = ReadRECT(reader);
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ushort frameRate = reader.ReadUInt16(); // 8.8
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ushort frameCount = reader.ReadUInt16();
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}
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private Rectangle ReadRECT(Reader reader)
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{
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// Bit values are stored by using the minimum number of bits possible for the range needed.
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// Most bit value fields use a fixed number of bits.Some use a variable number of bits, but in all
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// such cases, the number of bits to be used is explicitly stated in another field in the same
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// structure.In these variable - length cases, applications that generate SWF files must determine
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// the minimum number of bits necessary to represent the actual values that will be specified.
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// For signed-bit values, if the number to be encoded is positive, an extra bit is necessary to
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// preserve the leading 0; otherwise sign extension changes the bit value into a negative number.
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int nbits_ = reader.ReadBitsAsInt32(5);
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int xmin = 0, ymin = 0, xmax = 0, ymax = 0;
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return new Rectangle(xmin, ymin, xmax - xmin, ymax - ymin);
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}
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protected override void SaveInternal(ObjectModel objectModel)
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{
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throw new NotImplementedException();
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}
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}
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}
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