//------------------------------------------------------------------------------------- // Decompression //------------------------------------------------------------------------------------- _Use_decl_annotations_ HRESULT Decompress( const Image& cImage, DXGI_FORMAT format, ScratchImage& image ) { if ( !IsCompressed(cImage.format) || IsCompressed(format) ) return E_INVALIDARG; if ( format == DXGI_FORMAT_UNKNOWN ) { // Pick a default decompressed format based on BC input format format = _DefaultDecompress( cImage.format ); if ( format == DXGI_FORMAT_UNKNOWN ) { // Input is not a compressed format return E_INVALIDARG; } } else { if ( !IsValid(format) ) return E_INVALIDARG; if ( IsTypeless(format) || IsPlanar(format) || IsPalettized(format) ) return HRESULT_FROM_WIN32( ERROR_NOT_SUPPORTED ); } // Create decompressed image HRESULT hr = image.Initialize2D( format, cImage.width, cImage.height, 1, 1 ); if ( FAILED(hr) ) return hr; const Image *img = image.GetImage( 0, 0, 0 ); if ( !img ) { image.Release(); return E_POINTER; } // Decompress single image hr = _DecompressBC( cImage, *img ); if ( FAILED(hr) ) image.Release(); return hr; }
HRESULT Decompress( const Image* cImages, size_t nimages, const TexMetadata& metadata, DXGI_FORMAT format, ScratchImage& images ) { if ( !cImages || !nimages ) return E_INVALIDARG; if ( IsCompressed(format) || IsTypeless(format) ) return E_INVALIDARG; if ( format == DXGI_FORMAT_UNKNOWN ) { // Pick a default decompressed format based on BC input format format = _DefaultDecompress( cImages[0].format ); if ( format == DXGI_FORMAT_UNKNOWN ) { // Input is not a compressed format return E_FAIL; } } else if ( !IsValid(format) ) return E_INVALIDARG; images.Release(); TexMetadata mdata2 = metadata; mdata2.format = format; HRESULT hr = images.Initialize( mdata2 ); if ( FAILED(hr) ) return hr; if ( nimages != images.GetImageCount() ) { images.Release(); return E_FAIL; } const Image* dest = images.GetImages(); if ( !dest ) { images.Release(); return E_POINTER; } for( size_t index=0; index < nimages; ++index ) { assert( dest[ index ].format == format ); const Image& src = cImages[ index ]; if ( !IsCompressed( src.format ) ) { images.Release(); return E_FAIL; } if ( src.width != dest[ index ].width || src.height != dest[ index ].height ) { images.Release(); return E_FAIL; } hr = _DecompressBC( src, dest[ index ] ); if ( FAILED(hr) ) { images.Release(); return hr; } } return S_OK; }