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windowscodecs: Implement Initialize method for BMP decoder.

This commit is contained in:
Vincent Povirk 2009-06-13 17:15:55 -05:00 committed by Alexandre Julliard
parent 6f86ceef49
commit 0caec83215
1 changed files with 76 additions and 2 deletions
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78
dlls/windowscodecs/bmpdecode.c
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@ -25,6 +25,7 @@
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "wingdi.h"
#include "objbase.h"
#include "wincodec.h"
@ -34,11 +35,69 @@
WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
typedef struct {
DWORD bc2Size;
DWORD bc2Width;
DWORD bc2Height;
WORD bc2Planes;
WORD bc2BitCount;
DWORD bc2Compression;
DWORD bc2SizeImage;
DWORD bc2XRes;
DWORD bc2YRes;
DWORD bc2ClrUsed;
DWORD bc2ClrImportant;
/* same as BITMAPINFOHEADER until this point */
WORD bc2ResUnit;
WORD bc2Reserved;
WORD bc2Orientation;
WORD bc2Halftoning;
DWORD bc2HalftoneSize1;
DWORD bc2HalftoneSize2;
DWORD bc2ColorSpace;
DWORD bc2AppData;
} BITMAPCOREHEADER2;
typedef struct {
const IWICBitmapDecoderVtbl *lpVtbl;
LONG ref;
BOOL initialized;
IStream *stream;
BITMAPFILEHEADER bfh;
BITMAPV5HEADER bih;
} BmpDecoder;
static HRESULT BmpDecoder_ReadHeaders(BmpDecoder* This, IStream *stream)
{
HRESULT hr;
ULONG bytestoread, bytesread;
if (This->initialized) return WINCODEC_ERR_WRONGSTATE;
hr = IStream_Read(stream, &This->bfh, sizeof(BITMAPFILEHEADER), &bytesread);
if (FAILED(hr)) return hr;
if (bytesread != sizeof(BITMAPFILEHEADER) ||
This->bfh.bfType != 0x4d42 /* "BM" */) return E_FAIL;
hr = IStream_Read(stream, &This->bih.bV5Size, sizeof(DWORD), &bytesread);
if (FAILED(hr)) return hr;
if (bytesread != sizeof(DWORD) ||
(This->bih.bV5Size != sizeof(BITMAPCOREHEADER) &&
This->bih.bV5Size != sizeof(BITMAPCOREHEADER2) &&
This->bih.bV5Size != sizeof(BITMAPINFOHEADER) &&
This->bih.bV5Size != sizeof(BITMAPV4HEADER) &&
This->bih.bV5Size != sizeof(BITMAPV5HEADER))) return E_FAIL;
bytestoread = This->bih.bV5Size-sizeof(DWORD);
hr = IStream_Read(stream, &This->bih.bV5Width, bytestoread, &bytesread);
if (FAILED(hr)) return hr;
if (bytestoread != bytesread) return E_FAIL;
This->initialized = TRUE;
return S_OK;
}
HRESULT WINAPI BmpDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
void **ppv)
{
@ -79,7 +138,10 @@ static ULONG WINAPI BmpDecoder_Release(IWICBitmapDecoder *iface)
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
if (This->stream) IStream_Release(This->stream);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
@ -94,8 +156,18 @@ static HRESULT WINAPI BmpDecoder_QueryCapability(IWICBitmapDecoder *iface, IStre
static HRESULT WINAPI BmpDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
FIXME("(%p,%p,%x): stub\n", iface, pIStream, cacheOptions);
return E_NOTIMPL;
HRESULT hr;
BmpDecoder *This = (BmpDecoder*)iface;
hr = BmpDecoder_ReadHeaders(This, pIStream);
if (SUCCEEDED(hr))
{
This->stream = pIStream;
IStream_AddRef(pIStream);
}
return hr;
}
static HRESULT WINAPI BmpDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
@ -194,6 +266,8 @@ HRESULT BmpDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
This->lpVtbl = &BmpDecoder_Vtbl;
This->ref = 1;
This->initialized = FALSE;
This->stream = NULL;
ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
IUnknown_Release((IUnknown*)This);