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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef IMAGE_ANI_H
#define IMAGE_ANI_H
#include "common/array.h"
#include "common/types.h"
#include "common/func.h"
namespace Common {
class SeekableReadStream;
struct IFFChunk;
} // End of namespace Common
namespace Graphics {
class Cursor;
struct Surface;
} // End of namespace Graphics
namespace Image {
class AniDecoder {
public:
struct Metadata {
Metadata();
uint32 numFrames; // Number of images
uint32 numSteps; // Number of frames (use the FrameDef to determine which frame)
uint32 width;
uint32 height;
uint32 bitCount;
uint32 numPlanes;
uint32 perFrameDelay;
bool haveSeqData;
bool isCURFormat;
};
struct FrameDef {
FrameDef();
uint32 imageIndex;
uint32 delay; // In 1/60 sec
};
AniDecoder();
~AniDecoder();
bool open(Common::SeekableReadStream &stream, DisposeAfterUse::Flag = DisposeAfterUse::NO);
void close();
const Metadata &getMetadata() const;
FrameDef getSequenceFrame(uint sequenceIndex) const;
/**
* Opens a substream for an image. If the metadata field
* "isCURFormat" is set, you can pass the stream to IcoCurDecoder to
* read it. Otherwise, you must determine the format. The stream
* is valid for as long as the stream used to construct the AniDecoder
* is valid.
*
* @param imageIndex The index of the image in the ANI file.
* @return A substream for the image.
*/
Common::SeekableReadStream *openImageStream(uint imageIndex) const;
private:
struct RIFFContainerDef {
uint32 id;
uint32 size;
};
struct RIFFChunkDef {
uint32 id;
uint32 size;
};
struct FrameDataRange {
uint32 pos;
uint32 size;
};
typedef Common::Functor2<const RIFFContainerDef &, Common::SeekableReadStream &, bool> RIFFContainerParseFunc_t;
typedef Common::Functor2<const RIFFChunkDef &, Common::SeekableReadStream &, bool> RIFFChunkParseFunc_t;
bool load();
static bool parseRIFFChunks(Common::SeekableReadStream &stream, const RIFFChunkParseFunc_t &callback);
static bool parseRIFFContainer(Common::SeekableReadStream &stream, const RIFFChunkDef &chunkDef, const RIFFContainerParseFunc_t &callback);
bool parseTopLevelChunk(const RIFFChunkDef &chunk, Common::SeekableReadStream &stream);
bool parseTopLevelContainer(const RIFFContainerDef &container, Common::SeekableReadStream &stream);
bool parseSecondLevelChunk(const RIFFChunkDef &chunk, Common::SeekableReadStream &stream);
bool parseListContainer(const RIFFContainerDef &container, Common::SeekableReadStream &stream);
bool parseAnimHeaderChunk(const RIFFChunkDef &chunk, Common::SeekableReadStream &stream);
bool parseSeqChunk(const RIFFChunkDef &chunk, Common::SeekableReadStream &stream);
bool parseRateChunk(const RIFFChunkDef &chunk, Common::SeekableReadStream &stream);
bool parseIconChunk(const RIFFChunkDef &chunk, Common::SeekableReadStream &stream);
Metadata _metadata;
Common::Array<uint32> _rateData;
Common::Array<uint32> _seqData;
Common::Array<FrameDataRange> _frameDataLocations;
Common::SeekableReadStream *_stream;
DisposeAfterUse::Flag _disposeAfterUse;
};
} // End of namespace Image
#endif
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