Work around missing PKImageDecode_GetXMPMetadata_WMP in libjxr Debian…

… package

LEGAL

@@ -0,0 +1,25 @@
+jxrlib
+
+Copyright © Microsoft Corp.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+• Redistributions of source code must retain the above copyright notice,
+  this list of conditions and the following disclaimer.
+• Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.

src/load.c

@@ -187,11 +187,11 @@ static ERR jxrlib_load(const gchar* filename, Image* image, gchar** error_messag
         Call(decoder->GetColorContext(decoder, image->color_context, &image->color_context_size));
     }
 
-    Call(PKImageDecode_GetXMPMetadata_WMP(decoder, NULL, &image->xmp_metadata_size));
+    Call(_PKImageDecode_GetXMPMetadata_WMP(decoder, NULL, &image->xmp_metadata_size));
     if (image->xmp_metadata_size != 0)
     {
         image->xmp_metadata = g_new(guchar, image->xmp_metadata_size);
-        Call(PKImageDecode_GetXMPMetadata_WMP(decoder, image->xmp_metadata, &image->xmp_metadata_size));
+        Call(_PKImageDecode_GetXMPMetadata_WMP(decoder, image->xmp_metadata, &image->xmp_metadata_size));
     }
 
     image->black_one = decoder->WMP.wmiSCP.bBlackWhite;

src/utils.c

@@ -300,3 +300,60 @@ gchar* get_pixel_format_mnemonic(const PKPixelFormatGUID* pixel_format)
             return NULL;        
     }
 }
+
+// the following metadata helper functions have been copied from jxrlib as they are missing in libjxr Debian packages
+
+ERR _PKImageDecode_GetMetadata_WMP(PKImageDecode *pID, U32 uOffset, U32 uByteCount, U8 *pbGot, U32 *pcbGot)
+{
+    ERR err = WMP_errSuccess;
+
+    if (pbGot && uOffset)
+    {
+        struct WMPStream* pWS = pID->pStream;
+        size_t iCurrPos;
+
+        FailIf(*pcbGot < uByteCount, WMP_errBufferOverflow);
+        Call(pWS->GetPos(pWS, &iCurrPos));
+        Call(pWS->SetPos(pWS, uOffset));
+        Call(pWS->Read(pWS, pbGot, uByteCount));
+        Call(pWS->SetPos(pWS, iCurrPos));
+    }
+
+Cleanup:
+    if (Failed(err))
+        *pcbGot = 0;
+    else
+        *pcbGot = uByteCount;
+
+    return err;
+}
+
+ERR _PKImageDecode_GetXMPMetadata_WMP(PKImageDecode *pID, U8 *pbXMPMetadata, U32 *pcbXMPMetadata)
+{
+    return _PKImageDecode_GetMetadata_WMP(pID, pID->WMP.wmiDEMisc.uXMPMetadataOffset,
+        pID->WMP.wmiDEMisc.uXMPMetadataByteCount, pbXMPMetadata, pcbXMPMetadata);
+}
+
+ERR _PKImageDecode_GetEXIFMetadata_WMP(PKImageDecode *pID, U8 *pbEXIFMetadata, U32 *pcbEXIFMetadata)
+{
+    return _PKImageDecode_GetMetadata_WMP(pID, pID->WMP.wmiDEMisc.uEXIFMetadataOffset,
+        pID->WMP.wmiDEMisc.uEXIFMetadataByteCount, pbEXIFMetadata, pcbEXIFMetadata);
+}
+
+ERR _PKImageDecode_GetGPSInfoMetadata_WMP(PKImageDecode *pID, U8 *pbGPSInfoMetadata, U32 *pcbGPSInfoMetadata)
+{
+    return _PKImageDecode_GetMetadata_WMP(pID, pID->WMP.wmiDEMisc.uGPSInfoMetadataOffset,
+        pID->WMP.wmiDEMisc.uGPSInfoMetadataByteCount, pbGPSInfoMetadata, pcbGPSInfoMetadata);
+}
+
+ERR _PKImageDecode_GetIPTCNAAMetadata_WMP(PKImageDecode *pID, U8 *pbIPTCNAAMetadata, U32 *pcbIPTCNAAMetadata)
+{
+    return _PKImageDecode_GetMetadata_WMP(pID, pID->WMP.wmiDEMisc.uIPTCNAAMetadataOffset,
+        pID->WMP.wmiDEMisc.uIPTCNAAMetadataByteCount, pbIPTCNAAMetadata, pcbIPTCNAAMetadata);
+}
+
+ERR _PKImageDecode_GetPhotoshopMetadata_WMP(PKImageDecode *pID, U8 *pbPhotoshopMetadata, U32 *pcbPhotoshopMetadata)
+{
+    return _PKImageDecode_GetMetadata_WMP(pID, pID->WMP.wmiDEMisc.uPhotoshopMetadataOffset,
+        pID->WMP.wmiDEMisc.uPhotoshopMetadataByteCount, pbPhotoshopMetadata, pcbPhotoshopMetadata);
+}