X-Git-Url: http://git.dev.opencascade.org/gitweb/?p=occt.git;a=blobdiff_plain;f=src%2FImage%2FImage_DDSParser.hxx;h=70106979e7bbf4b695cc1139a8dad8b1087805c1;hb=faff37677c2293ad207e6ad3e308aa65ffcd6375;hpb=691711cd3e118643fc475c59d6eb83f410de5c65

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