61 lines
2.5 KiB
C++
61 lines
2.5 KiB
C++
// Copyright (c) 2020 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _Image_DDSParser_HeaderFile
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#define _Image_DDSParser_HeaderFile
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#include "Image_CompressedPixMap.hxx"
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#include "NCollection_Buffer.hxx"
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class Image_SupportedFormats;
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//! Auxiliary tool for parsing DDS file structure (without decoding).
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class Image_DDSParser
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{
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public:
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//! Load the face from DDS file.
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//! @param[in] theSupported list of supported image formats
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//! @param[in] theFile file path
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//! @param[in] theFaceIndex face index, within [0, Image_CompressedPixMap::NbFaces()) range;
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//! use -1 to skip reading the face data
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//! @param[in] theFileOffset offset to the DDS data
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//! @return loaded face or NULL if file cannot be read or not valid DDS file
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Standard_EXPORT static Handle(Image_CompressedPixMap) Load(
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const Handle(Image_SupportedFormats)& theSupported,
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const TCollection_AsciiString& theFile,
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const Standard_Integer theFaceIndex,
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const int64_t theFileOffset = 0);
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//! Load the face from DDS file.
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//! @param[in] theSupported list of supported image formats
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//! @param[in] theBuffer pre-loaded file data, should be at least of 128 bytes long defining
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//! DDS header.
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//! @param[in] theFaceIndex face index, within [0, Image_CompressedPixMap::NbFaces()) range;
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//! use -1 to skip reading the face data
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//! @return loaded face or NULL if file cannot be read or not valid DDS file
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Standard_EXPORT static Handle(Image_CompressedPixMap) Load(
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const Handle(Image_SupportedFormats)& theSupported,
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const Handle(NCollection_Buffer)& theBuffer,
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const Standard_Integer theFaceIndex);
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private:
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struct DDSPixelFormat;
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struct DDSFileHeader;
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private:
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//! Parse DDS header.
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static Handle(Image_CompressedPixMap) parseHeader(const DDSFileHeader& theHeader);
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};
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#endif // _Image_DDSParser_HeaderFile
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