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https://github.com/libretro/scummvm.git
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137 lines
3.9 KiB
C++
137 lines
3.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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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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*
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*/
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#ifndef IMAGE_ANI_H
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#define IMAGE_ANI_H
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#include "common/array.h"
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#include "common/types.h"
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#include "common/func.h"
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namespace Common {
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class SeekableReadStream;
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struct IFFChunk;
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} // End of namespace Common
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namespace Graphics {
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class Cursor;
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struct Surface;
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} // End of namespace Graphics
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namespace Image {
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class AniDecoder {
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public:
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struct Metadata {
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Metadata();
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uint32 numFrames; // Number of images
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uint32 numSteps; // Number of frames (use the FrameDef to determine which frame)
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uint32 width;
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uint32 height;
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uint32 bitCount;
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uint32 numPlanes;
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uint32 perFrameDelay;
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bool haveSeqData;
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bool isCURFormat;
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};
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struct FrameDef {
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FrameDef();
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uint32 imageIndex;
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uint32 delay; // In 1/60 sec
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};
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AniDecoder();
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~AniDecoder();
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bool open(Common::SeekableReadStream &stream, DisposeAfterUse::Flag = DisposeAfterUse::NO);
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void close();
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const Metadata &getMetadata() const;
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FrameDef getSequenceFrame(uint sequenceIndex) const;
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/**
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* Opens a substream for an image. If the metadata field
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* "isCURFormat" is set, you can pass the stream to IcoCurDecoder to
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* read it. Otherwise, you must determine the format. The stream
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* is valid for as long as the stream used to construct the AniDecoder
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* is valid.
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*
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* @param imageIndex The index of the image in the ANI file.
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* @return A substream for the image.
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*/
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Common::SeekableReadStream *openImageStream(uint imageIndex) const;
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private:
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struct RIFFContainerDef {
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uint32 id;
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uint32 size;
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};
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struct RIFFChunkDef {
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uint32 id;
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uint32 size;
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};
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struct FrameDataRange {
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uint32 pos;
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uint32 size;
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};
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typedef Common::Functor2<const RIFFContainerDef &, Common::SeekableReadStream &, bool> RIFFContainerParseFunc_t;
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typedef Common::Functor2<const RIFFChunkDef &, Common::SeekableReadStream &, bool> RIFFChunkParseFunc_t;
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bool load();
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static bool parseRIFFChunks(Common::SeekableReadStream &stream, const RIFFChunkParseFunc_t &callback);
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static bool parseRIFFContainer(Common::SeekableReadStream &stream, const RIFFChunkDef &chunkDef, const RIFFContainerParseFunc_t &callback);
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bool parseTopLevelChunk(const RIFFChunkDef &chunk, Common::SeekableReadStream &stream);
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bool parseTopLevelContainer(const RIFFContainerDef &container, Common::SeekableReadStream &stream);
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bool parseSecondLevelChunk(const RIFFChunkDef &chunk, Common::SeekableReadStream &stream);
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bool parseListContainer(const RIFFContainerDef &container, Common::SeekableReadStream &stream);
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bool parseAnimHeaderChunk(const RIFFChunkDef &chunk, Common::SeekableReadStream &stream);
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bool parseSeqChunk(const RIFFChunkDef &chunk, Common::SeekableReadStream &stream);
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bool parseRateChunk(const RIFFChunkDef &chunk, Common::SeekableReadStream &stream);
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bool parseIconChunk(const RIFFChunkDef &chunk, Common::SeekableReadStream &stream);
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Metadata _metadata;
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Common::Array<uint32> _rateData;
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Common::Array<uint32> _seqData;
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Common::Array<FrameDataRange> _frameDataLocations;
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Common::SeekableReadStream *_stream;
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DisposeAfterUse::Flag _disposeAfterUse;
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};
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} // End of namespace Image
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#endif
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