windowscodecs: Create a IWICMetadataReader for a TIFF frame. Take 3.
Dmitry Timoshkov
dmitry at baikal.ru
Mon Jun 18 21:40:10 CDT 2012
---
dlls/windowscodecs/tiffformat.c | 75 +++++++++++++++++++++++++++++++++++++----
1 file changed, 69 insertions(+), 6 deletions(-)
diff --git a/dlls/windowscodecs/tiffformat.c b/dlls/windowscodecs/tiffformat.c
index 669351d..cd3703f 100644
--- a/dlls/windowscodecs/tiffformat.c
+++ b/dlls/windowscodecs/tiffformat.c
@@ -58,9 +58,10 @@ static void *libtiff_handle;
#define MAKE_FUNCPTR(f) static typeof(f) * p##f
MAKE_FUNCPTR(TIFFClientOpen);
MAKE_FUNCPTR(TIFFClose);
-MAKE_FUNCPTR(TIFFNumberOfDirectories);
+MAKE_FUNCPTR(TIFFCurrentDirOffset);
MAKE_FUNCPTR(TIFFGetField);
MAKE_FUNCPTR(TIFFIsByteSwapped);
+MAKE_FUNCPTR(TIFFNumberOfDirectories);
MAKE_FUNCPTR(TIFFReadDirectory);
MAKE_FUNCPTR(TIFFReadEncodedStrip);
MAKE_FUNCPTR(TIFFReadEncodedTile);
@@ -89,9 +90,10 @@ static void *load_libtiff(void)
}
LOAD_FUNCPTR(TIFFClientOpen);
LOAD_FUNCPTR(TIFFClose);
- LOAD_FUNCPTR(TIFFNumberOfDirectories);
+ LOAD_FUNCPTR(TIFFCurrentDirOffset);
LOAD_FUNCPTR(TIFFGetField);
LOAD_FUNCPTR(TIFFIsByteSwapped);
+ LOAD_FUNCPTR(TIFFNumberOfDirectories);
LOAD_FUNCPTR(TIFFReadDirectory);
LOAD_FUNCPTR(TIFFReadEncodedStrip);
LOAD_FUNCPTR(TIFFReadEncodedTile);
@@ -1133,15 +1135,76 @@ static HRESULT WINAPI TiffFrameDecode_Block_GetContainerFormat(IWICMetadataBlock
static HRESULT WINAPI TiffFrameDecode_Block_GetCount(IWICMetadataBlockReader *iface,
UINT *count)
{
- FIXME("(%p,%p): stub\n", iface, count);
- return E_NOTIMPL;
+ TRACE("%p,%p\n", iface, count);
+
+ if (!count) return E_INVALIDARG;
+
+ *count = 1;
+ return S_OK;
+}
+
+static HRESULT create_metadata_reader(TiffFrameDecode *This, IWICMetadataReader **reader)
+{
+ HRESULT hr;
+ LARGE_INTEGER dir_offset;
+ IWICMetadataReader *metadata_reader;
+ IWICPersistStream *persist;
+
+ /* FIXME: Use IWICComponentFactory_CreateMetadataReader once it's implemented */
+
+ hr = CoCreateInstance(&CLSID_WICIfdMetadataReader, NULL, CLSCTX_INPROC_SERVER,
+ &IID_IWICMetadataReader, (void **)&metadata_reader);
+ if (FAILED(hr)) return hr;
+
+ hr = IWICMetadataReader_QueryInterface(metadata_reader, &IID_IWICPersistStream, (void **)&persist);
+ if (FAILED(hr))
+ {
+ IWICMetadataReader_Release(metadata_reader);
+ return hr;
+ }
+
+ EnterCriticalSection(&This->parent->lock);
+
+ dir_offset.QuadPart = pTIFFCurrentDirOffset(This->parent->tiff);
+ hr = IStream_Seek(This->parent->stream, dir_offset, STREAM_SEEK_SET, NULL);
+ if (SUCCEEDED(hr))
+ {
+ BOOL byte_swapped = pTIFFIsByteSwapped(This->parent->tiff);
+#ifdef WORDS_BIGENDIAN
+ DWORD persist_options = byte_swapped ? WICPersistOptionsLittleEndian : WICPersistOptionsBigEndian;
+#else
+ DWORD persist_options = byte_swapped ? WICPersistOptionsBigEndian : WICPersistOptionsLittleEndian;
+#endif
+ persist_options |= WICPersistOptionsNoCacheStream;
+ hr = IWICPersistStream_LoadEx(persist, This->parent->stream, NULL, persist_options);
+ if (FAILED(hr))
+ ERR("IWICPersistStream_LoadEx error %#x\n", hr);
+ }
+
+ LeaveCriticalSection(&This->parent->lock);
+
+ IWICPersistStream_Release(persist);
+
+ if (FAILED(hr))
+ {
+ IWICMetadataReader_Release(metadata_reader);
+ return hr;
+ }
+
+ *reader = metadata_reader;
+ return S_OK;
}
static HRESULT WINAPI TiffFrameDecode_Block_GetReaderByIndex(IWICMetadataBlockReader *iface,
UINT index, IWICMetadataReader **reader)
{
- FIXME("(%p,%u,%p): stub\n", iface, index, reader);
- return E_NOTIMPL;
+ TiffFrameDecode *This = impl_from_IWICMetadataBlockReader(iface);
+
+ TRACE("(%p,%u,%p)\n", iface, index, reader);
+
+ if (!reader || index != 0) return E_INVALIDARG;
+
+ return create_metadata_reader(This, reader);
}
static HRESULT WINAPI TiffFrameDecode_Block_GetEnumerator(IWICMetadataBlockReader *iface,
--
1.7.11
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