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gdiplus: Add GIF comment to the image properties.

This commit is contained in:
Dmitry Timoshkov 2012-09-25 12:51:23 +09:00 committed by Alexandre Julliard
parent a0424f33c0
commit 000f4725aa
1 changed files with 126 additions and 1 deletions
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127
dlls/gdiplus/image.c
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@ -3100,8 +3100,133 @@ GpStatus WINGDIPAPI GdipLoadImageFromFileICM(GDIPCONST WCHAR* filename,GpImage *
return GdipLoadImageFromFile(filename, image);
}
static void gif_metadata_reader(GpBitmap *bitmap, IWICBitmapDecoder *decoder, UINT frame)
static void add_property(GpBitmap *bitmap, PropertyItem *item)
{
UINT prop_size, prop_count;
PropertyItem *prop_item;
if (bitmap->prop_item == NULL)
{
prop_size = prop_count = 0;
prop_item = GdipAlloc(item->length + sizeof(PropertyItem));
if (!prop_item) return;
}
else
{
UINT i;
char *item_value;
GdipGetPropertySize((GpImage *)bitmap, &prop_size, &prop_count);
prop_item = GdipAlloc(prop_size + item->length + sizeof(PropertyItem));
if (!prop_item) return;
memcpy(prop_item, bitmap->prop_item, sizeof(PropertyItem) * bitmap->prop_count);
prop_size -= sizeof(PropertyItem) * bitmap->prop_count;
memcpy(prop_item + prop_count + 1, bitmap->prop_item + prop_count, prop_size);
item_value = (char *)(prop_item + prop_count + 1);
for (i = 0; i < prop_count; i++)
{
prop_item[i].value = item_value;
item_value += prop_item[i].length;
}
}
prop_item[prop_count].id = item->id;
prop_item[prop_count].type = item->type;
prop_item[prop_count].length = item->length;
prop_item[prop_count].value = (char *)(prop_item + prop_count + 1) + prop_size;
memcpy(prop_item[prop_count].value, item->value, item->length);
GdipFree(bitmap->prop_item);
bitmap->prop_item = prop_item;
bitmap->prop_count++;
}
static PropertyItem *get_property(IWICMetadataReader *reader, const GUID *guid, const WCHAR *prop_name)
{
HRESULT hr;
GUID format;
PROPVARIANT id, value;
PropertyItem *item = NULL;
IWICMetadataReader_GetMetadataFormat(reader, &format);
if (!IsEqualGUID(&format, guid)) return NULL;
PropVariantInit(&id);
PropVariantInit(&value);
id.vt = VT_LPWSTR;
id.u.pwszVal = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(prop_name) + 1) * sizeof(WCHAR));
if (!id.u.pwszVal) return NULL;
lstrcpyW(id.u.pwszVal, prop_name);
hr = IWICMetadataReader_GetValue(reader, NULL, &id, &value);
if (hr == S_OK)
{
UINT item_size = propvariant_size(&value);
if (item_size)
{
item_size += sizeof(*item);
item = GdipAlloc(item_size);
if (propvariant_to_item(&value, item, item_size, 0) != Ok)
{
GdipFree(item);
item = NULL;
}
}
}
PropVariantClear(&id);
PropVariantClear(&value);
return item;
}
static PropertyItem *get_gif_comment(IWICMetadataReader *reader)
{
static const WCHAR textentryW[] = { 'T','e','x','t','E','n','t','r','y',0 };
PropertyItem *comment;
comment = get_property(reader, &GUID_MetadataFormatGifComment, textentryW);
if (comment)
comment->id = PropertyTagExifUserComment;
return comment;
}
static void gif_metadata_reader(GpBitmap *bitmap, IWICBitmapDecoder *decoder, UINT active_frame)
{
HRESULT hr;
IWICMetadataBlockReader *block_reader;
IWICMetadataReader *reader;
UINT block_count, i;
PropertyItem *comment = NULL;
hr = IWICBitmapDecoder_QueryInterface(decoder, &IID_IWICMetadataBlockReader, (void **)&block_reader);
if (hr == S_OK)
{
hr = IWICMetadataBlockReader_GetCount(block_reader, &block_count);
if (hr == S_OK)
{
for (i = 0; i < block_count; i++)
{
hr = IWICMetadataBlockReader_GetReaderByIndex(block_reader, i, &reader);
if (hr == S_OK)
{
if (!comment)
comment = get_gif_comment(reader);
IWICMetadataReader_Release(reader);
}
}
}
IWICMetadataBlockReader_Release(block_reader);
}
if (comment) add_property(bitmap, comment);
GdipFree(comment);
}
typedef void (*metadata_reader_func)(GpBitmap *bitmap, IWICBitmapDecoder *decoder, UINT frame);