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windowscodecs: Add support for WICPersistOptionsLittleEndian/WICPersistOptionsBigEndian in the IFD metadata reader.

This commit is contained in:
Dmitry Timoshkov 2012-06-13 18:31:02 +09:00 committed by Alexandre Julliard
parent ec43788803
commit 5f22fdb86f
1 changed files with 40 additions and 11 deletions
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51
dlls/windowscodecs/metadatahandler.c
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@ -1,5 +1,6 @@
/*
* Copyright 2012 Vincent Povirk for CodeWeavers
* Copyright 2012 Dmitry Timoshkov
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -26,6 +27,7 @@
#include "windef.h"
#include "winbase.h"
#include "winternl.h"
#include "objbase.h"
#include "wincodec.h"
#include "wincodecsdk.h"
@ -599,12 +601,16 @@ HRESULT UnknownMetadataReader_CreateInstance(IUnknown *pUnkOuter, REFIID iid, vo
return MetadataReader_Create(&UnknownMetadataReader_Vtbl, pUnkOuter, iid, ppv);
}
#define SWAP_USHORT(x) do { if (!native_byte_order) (x) = RtlUshortByteSwap(x); } while(0)
#define SWAP_ULONG(x) do { if (!native_byte_order) (x) = RtlUlongByteSwap(x); } while(0)
#define SWAP_ULONGLONG(x) do { if (!native_byte_order) (x) = RtlUlonglongByteSwap(x); } while(0)
#include "pshpack2.h"
struct IFD_entry
{
SHORT id;
SHORT type;
ULONG length;
ULONG count;
LONG value;
};
@ -629,47 +635,60 @@ struct IFD_rational
#define IFD_DOUBLE 12
#define IFD_IFD 13
static HRESULT load_IFD_entry(IStream *input, struct IFD_entry *entry, MetadataItem *item)
static HRESULT load_IFD_entry(IStream *input, const struct IFD_entry *entry,
MetadataItem *item, BOOL native_byte_order)
{
ULONG count, value;
SHORT type;
item->schema.vt = VT_EMPTY;
item->id.vt = VT_UI2;
item->id.u.uiVal = entry->id;
SWAP_USHORT(item->id.u.uiVal);
switch (entry->type)
count = entry->count;
SWAP_ULONG(count);
type = entry->type;
SWAP_USHORT(type);
value = entry->value;
SWAP_ULONG(value);
switch (type)
{
case IFD_SHORT:
if (entry->length == 1)
if (count == 1)
{
item->value.vt = VT_UI2;
item->value.u.uiVal = entry->value;
item->value.u.uiVal = value;
break;
}
FIXME("loading multiple short fields is not implemented\n");
break;
case IFD_LONG:
if (entry->length == 1)
if (count == 1)
{
item->value.vt = VT_UI4;
item->value.u.ulVal = entry->value;
item->value.u.ulVal = value;
break;
}
FIXME("loading multiple long fields is not implemented\n");
break;
case IFD_RATIONAL:
if (entry->length == 1)
if (count == 1)
{
HRESULT hr;
LARGE_INTEGER pos;
struct IFD_rational rational;
pos.QuadPart = entry->value;
pos.QuadPart = value;
hr = IStream_Seek(input, pos, SEEK_SET, NULL);
if (FAILED(hr)) return hr;
item->value.vt = VT_UI8;
hr = IStream_Read(input, &rational , sizeof(rational), NULL);
hr = IStream_Read(input, &rational, sizeof(rational), NULL);
if (FAILED(hr)) return hr;
item->value.u.uhVal.QuadPart = ((LONGLONG)rational.denominator << 32) | rational.numerator;
SWAP_ULONGLONG(item->value.u.uhVal.QuadPart);
break;
}
FIXME("loading multiple rational fields is not implemented\n");
@ -688,12 +707,22 @@ static HRESULT LoadIfdMetadata(IStream *input, const GUID *preferred_vendor,
MetadataItem *result;
USHORT count, i;
struct IFD_entry *entry;
BOOL native_byte_order = TRUE;
TRACE("\n");
#ifdef WORDS_BIGENDIAN
if (persist_options & WICPersistOptionsLittleEndian)
#else
if (persist_options & WICPersistOptionsBigEndian)
#endif
native_byte_order = FALSE;
hr = IStream_Read(input, &count, sizeof(count), NULL);
if (FAILED(hr)) return hr;
SWAP_USHORT(count);
entry = HeapAlloc(GetProcessHeap(), 0, count * sizeof(*entry));
if (!entry) return E_OUTOFMEMORY;
@ -713,7 +742,7 @@ static HRESULT LoadIfdMetadata(IStream *input, const GUID *preferred_vendor,
for (i = 0; i < count; i++)
{
hr = load_IFD_entry(input, &entry[i], &result[i]);
hr = load_IFD_entry(input, &entry[i], &result[i], native_byte_order);
if (FAILED(hr))
{
HeapFree(GetProcessHeap(), 0, entry);