[5/9] windowscodecs: implement Initialize method for BMP decoder
Vincent Povirk
madewokherd+8cd9 at gmail.com
Sat Jun 27 20:50:10 CDT 2009
Vincent Povirk
-------------- next part --------------
From 9ceed6ff5dc2384cdb43e6c56cc92b5f22e24f4b Mon Sep 17 00:00:00 2001
From: Vincent Povirk <madewokherd at gmail.com>
Date: Sat, 13 Jun 2009 17:15:55 -0500
Subject: [PATCH 5/9] windowscodecs: implement Initialize method for BMP decoder
---
dlls/windowscodecs/bmpdecode.c | 78 ++++++++++++++++++++++++++++++++++++++-
1 files changed, 76 insertions(+), 2 deletions(-)
diff --git a/dlls/windowscodecs/bmpdecode.c b/dlls/windowscodecs/bmpdecode.c
index 4bcd753..fc4ea92 100644
--- a/dlls/windowscodecs/bmpdecode.c
+++ b/dlls/windowscodecs/bmpdecode.c
@@ -25,6 +25,7 @@
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
+#include "wingdi.h"
#include "objbase.h"
#include "wincodec.h"
@@ -35,10 +36,68 @@
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 *lpIWICBitmapDecoderVtbl;
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->lpIWICBitmapDecoderVtbl = &BmpDecoder_Vtbl;
This->ref = 1;
+ This->initialized = FALSE;
+ This->stream = NULL;
ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
IUnknown_Release((IUnknown*)This);
--
1.6.3.1
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