reactos/wine
1
0
Fork 0
mirror of https://github.com/reactos/wine.git synced 2024-11-25 20:59:54 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

windowscodecs: Implement CopyPixels for the TGA decoder.

Browse Source
This commit is contained in:
Vincent Povirk 2010-06-07 17:13:56 -05:00 committed by Alexandre Julliard
parent a638c663b5
commit c2533f3691
1 changed files with 106 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

108
dlls/windowscodecs/tgaformat.c
View File

@ -72,6 +72,13 @@ typedef struct {
BOOL initialized;
IStream *stream;
tga_header header;
BYTE *imagebits;
BYTE *origin;
int stride;
ULONG id_offset;
ULONG colormap_length;
ULONG colormap_offset;
ULONG image_offset;
CRITICAL_SECTION lock;
} TgaDecoder;
@ -125,6 +132,7 @@ static ULONG WINAPI TgaDecoder_Release(IWICBitmapDecoder *iface)
DeleteCriticalSection(&This->lock);
if (This->stream)
IStream_Release(This->stream);
HeapFree(GetProcessHeap(), 0, This->imagebits);
HeapFree(GetProcessHeap(), 0, This);
}
@ -209,6 +217,15 @@ static HRESULT WINAPI TgaDecoder_Initialize(IWICBitmapDecoder *iface, IStream *p
goto end;
}
/* Locate data in the file based on the header. */
This->id_offset = sizeof(tga_header);
This->colormap_offset = This->id_offset + This->header.id_length;
if (This->header.colormap_type == 1)
This->colormap_length = ((This->header.colormap_entrysize+7)/8) * This->header.colormap_length;
else
This->colormap_length = 0;
This->image_offset = This->colormap_offset + This->colormap_length;
/* FIXME: Read footer if there is one. */
IStream_AddRef(pIStream);
@ -436,11 +453,97 @@ static HRESULT WINAPI TgaDecoder_Frame_CopyPalette(IWICBitmapFrameDecode *iface,
return E_NOTIMPL;
}
static HRESULT TgaDecoder_ReadImage(TgaDecoder *This)
{
HRESULT hr=S_OK;
int datasize;
LARGE_INTEGER seek;
ULONG bytesread;
if (This->imagebits)
return S_OK;
EnterCriticalSection(&This->lock);
if (!This->imagebits)
{
if (This->header.image_descriptor & IMAGE_RIGHTTOLEFT)
{
FIXME("Right to left image reading not implemented\n");
hr = E_NOTIMPL;
}
if (SUCCEEDED(hr))
{
datasize = This->header.width * This->header.height * (This->header.depth / 8);
This->imagebits = HeapAlloc(GetProcessHeap(), 0, datasize);
if (!This->imagebits) hr = E_OUTOFMEMORY;
}
if (SUCCEEDED(hr))
{
seek.QuadPart = This->image_offset;
hr = IStream_Seek(This->stream, seek, STREAM_SEEK_SET, NULL);
}
if (SUCCEEDED(hr))
{
if (This->header.image_type & IMAGETYPE_RLE)
{
FIXME("RLE decoding not implemented\n");
hr = E_NOTIMPL;
}
else
{
hr = IStream_Read(This->stream, This->imagebits, datasize, &bytesread);
if (SUCCEEDED(hr) && bytesread != datasize)
hr = E_FAIL;
}
}
if (SUCCEEDED(hr))
{
if (This->header.image_descriptor & IMAGE_TOPTOBOTTOM)
{
This->origin = This->imagebits;
This->stride = This->header.width * (This->header.depth / 8);
}
else
{
This->stride = -This->header.width * (This->header.depth / 8);
This->origin = This->imagebits + This->header.width * (This->header.height - 1) * (This->header.depth / 8);
}
}
else
{
HeapFree(GetProcessHeap(), 0, This->imagebits);
This->imagebits = NULL;
}
}
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI TgaDecoder_Frame_CopyPixels(IWICBitmapFrameDecode *iface,
const WICRect *prc, UINT cbStride, UINT cbBufferSize, BYTE *pbBuffer)
{
FIXME("(%p,%p,%u,%u,%p):stub\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
return E_NOTIMPL;
TgaDecoder *This = decoder_from_frame(iface);
HRESULT hr;
TRACE("(%p,%p,%u,%u,%p)\n", iface, prc, cbStride, cbBufferSize, pbBuffer);
hr = TgaDecoder_ReadImage(This);
if (SUCCEEDED(hr))
{
hr = copy_pixels(This->header.depth, This->origin,
This->header.width, This->header.height, This->stride,
prc, cbStride, cbBufferSize, pbBuffer);
}
return hr;
}
static HRESULT WINAPI TgaDecoder_Frame_GetMetadataQueryReader(IWICBitmapFrameDecode *iface,
@ -497,6 +600,7 @@ HRESULT TgaDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
This->ref = 1;
This->initialized = FALSE;
This->stream = NULL;
This->imagebits = NULL;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": TgaDecoder.lock");