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windowscodecs: Implement Initialize for the TGA decoder.

This commit is contained in:
Vincent Povirk 2010-06-07 16:14:59 -05:00 committed by Alexandre Julliard
parent 7bf6ad916b
commit 6d20f77517
1 changed files with 119 additions and 2 deletions
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121
dlls/windowscodecs/tgaformat.c
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@ -35,10 +35,44 @@
WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
#include "pshpack1.h"
typedef struct {
BYTE id_length;
BYTE colormap_type;
BYTE image_type;
/* Colormap Specification */
WORD colormap_firstentry;
WORD colormap_length;
BYTE colormap_entrysize;
/* Image Specification */
WORD xorigin;
WORD yorigin;
WORD width;
WORD height;
BYTE depth;
BYTE image_descriptor;
} tga_header;
#define IMAGETYPE_COLORMAPPED 1
#define IMAGETYPE_TRUECOLOR 2
#define IMAGETYPE_GRAYSCALE 3
#define IMAGETYPE_RLE 8
#define IMAGE_ATTRIBUTE_BITCOUNT_MASK 0xf
#define IMAGE_RIGHTTOLEFT 0x10
#define IMAGE_TOPTOBOTTOM 0x20
#include "poppack.h"
typedef struct {
const IWICBitmapDecoderVtbl *lpVtbl;
const IWICBitmapFrameDecodeVtbl *lpFrameVtbl;
LONG ref;
BOOL initialized;
IStream *stream;
tga_header header;
CRITICAL_SECTION lock;
} TgaDecoder;
static inline TgaDecoder *decoder_from_frame(IWICBitmapFrameDecode *iface)
@ -87,6 +121,10 @@ static ULONG WINAPI TgaDecoder_Release(IWICBitmapDecoder *iface)
if (ref == 0)
{
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
if (This->stream)
IStream_Release(This->stream);
HeapFree(GetProcessHeap(), 0, This);
}
@ -103,8 +141,83 @@ static HRESULT WINAPI TgaDecoder_QueryCapability(IWICBitmapDecoder *iface, IStre
static HRESULT WINAPI TgaDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
FIXME("(%p,%p,%u): stub\n", iface, pIStream, cacheOptions);
return E_NOTIMPL;
TgaDecoder *This = (TgaDecoder*)iface;
HRESULT hr=S_OK;
DWORD bytesread;
LARGE_INTEGER seek;
TRACE("(%p,%p,%u)\n", iface, pIStream, cacheOptions);
EnterCriticalSection(&This->lock);
if (This->initialized)
{
hr = WINCODEC_ERR_WRONGSTATE;
goto end;
}
seek.QuadPart = 0;
hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto end;
hr = IStream_Read(pIStream, &This->header, sizeof(tga_header), &bytesread);
if (SUCCEEDED(hr) && bytesread != sizeof(tga_header))
{
TRACE("got only %u bytes\n", bytesread);
hr = E_FAIL;
}
if (FAILED(hr)) goto end;
TRACE("imagetype=%u, colormap type=%u, depth=%u, image descriptor=0x%x\n",
This->header.image_type, This->header.colormap_type,
This->header.depth, This->header.image_descriptor);
/* Sanity checking. Since TGA has no clear identifying markers, we need
* to be careful to not load a non-TGA image. */
switch (This->header.image_type)
{
case IMAGETYPE_COLORMAPPED:
case IMAGETYPE_COLORMAPPED|IMAGETYPE_RLE:
if (This->header.colormap_type != 1)
hr = E_FAIL;
break;
case IMAGETYPE_TRUECOLOR:
case IMAGETYPE_TRUECOLOR|IMAGETYPE_RLE:
if (This->header.colormap_type != 0 && This->header.colormap_type != 1)
hr = E_FAIL;
break;
case IMAGETYPE_GRAYSCALE:
case IMAGETYPE_GRAYSCALE|IMAGETYPE_RLE:
if (This->header.colormap_type != 0)
hr = E_FAIL;
break;
default:
hr = E_FAIL;
}
if (This->header.depth != 8 && This->header.depth != 16 &&
This->header.depth != 24 && This->header.depth != 32)
hr = E_FAIL;
if ((This->header.image_descriptor & IMAGE_ATTRIBUTE_BITCOUNT_MASK) > 8 ||
(This->header.image_descriptor & 0xc0) != 0)
hr = E_FAIL;
if (FAILED(hr))
{
WARN("bad tga header\n");
goto end;
}
/* FIXME: Read footer if there is one. */
IStream_AddRef(pIStream);
This->stream = pIStream;
This->initialized = TRUE;
end:
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI TgaDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
@ -309,6 +422,10 @@ HRESULT TgaDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
This->lpVtbl = &TgaDecoder_Vtbl;
This->lpFrameVtbl = &TgaDecoder_Frame_Vtbl;
This->ref = 1;
This->initialized = FALSE;
This->stream = NULL;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": TgaDecoder.lock");
ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
IUnknown_Release((IUnknown*)This);