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wine/dlls/windowscodecs/tgaformat.c

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/*
* Copyright 2010 Vincent Povirk for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "objbase.h"
#include "wincodec.h"
#include "wincodecs_private.h"
#include "wine/debug.h"
#include "wine/library.h"
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
typedef struct {
DWORD extension_area_offset;
DWORD developer_directory_offset;
char magic[18];
} tga_footer;
static const BYTE tga_footer_magic[18] = "TRUEVISION-XFILE.";
typedef struct {
WORD size;
char author_name[41];
char author_comments[324];
WORD timestamp[6];
char job_name[41];
WORD job_timestamp[6];
char software_id[41];
WORD software_version;
char software_version_letter;
DWORD key_color;
WORD pixel_width;
WORD pixel_height;
WORD gamma_numerator;
WORD gamma_denominator;
DWORD color_correction_offset;
DWORD thumbnail_offset;
DWORD scanline_offset;
BYTE attributes_type;
} tga_extension_area;
#define ATTRIBUTE_NO_ALPHA 0
#define ATTRIBUTE_UNDEFINED 1
#define ATTRIBUTE_UNDEFINED_PRESERVE 2
#define ATTRIBUTE_ALPHA 3
#define ATTRIBUTE_PALPHA 4
#include "poppack.h"
typedef struct {
IWICBitmapDecoder IWICBitmapDecoder_iface;
IWICBitmapFrameDecode IWICBitmapFrameDecode_iface;
LONG ref;
BOOL initialized;
IStream *stream;
tga_header header;
tga_extension_area extension_area;
BYTE *imagebits;
BYTE *origin;
int stride;
ULONG id_offset;
ULONG colormap_length;
ULONG colormap_offset;
ULONG image_offset;
ULONG extension_area_offset;
ULONG developer_directory_offset;
CRITICAL_SECTION lock;
} TgaDecoder;
static inline TgaDecoder *impl_from_IWICBitmapDecoder(IWICBitmapDecoder *iface)
{
return CONTAINING_RECORD(iface, TgaDecoder, IWICBitmapDecoder_iface);
}
static inline TgaDecoder *impl_from_IWICBitmapFrameDecode(IWICBitmapFrameDecode *iface)
{
return CONTAINING_RECORD(iface, TgaDecoder, IWICBitmapFrameDecode_iface);
}
static HRESULT WINAPI TgaDecoder_QueryInterface(IWICBitmapDecoder *iface, REFIID iid,
void **ppv)
{
TgaDecoder *This = impl_from_IWICBitmapDecoder(iface);
TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) || IsEqualIID(&IID_IWICBitmapDecoder, iid))
{
*ppv = &This->IWICBitmapDecoder_iface;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI TgaDecoder_AddRef(IWICBitmapDecoder *iface)
{
TgaDecoder *This = impl_from_IWICBitmapDecoder(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI TgaDecoder_Release(IWICBitmapDecoder *iface)
{
TgaDecoder *This = impl_from_IWICBitmapDecoder(iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
if (This->stream)
IStream_Release(This->stream);
HeapFree(GetProcessHeap(), 0, This->imagebits);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static HRESULT WINAPI TgaDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *pIStream,
DWORD *pdwCapability)
{
FIXME("(%p,%p,%p): stub\n", iface, pIStream, pdwCapability);
return E_NOTIMPL;
}
static HRESULT WINAPI TgaDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
TgaDecoder *This = impl_from_IWICBitmapDecoder(iface);
HRESULT hr=S_OK;
DWORD bytesread;
LARGE_INTEGER seek;
tga_footer footer;
int attribute_bitcount;
int mapped_depth=0;
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;
mapped_depth = This->header.colormap_entrysize;
break;
case IMAGETYPE_TRUECOLOR:
case IMAGETYPE_TRUECOLOR|IMAGETYPE_RLE:
if (This->header.colormap_type != 0 && This->header.colormap_type != 1)
hr = E_FAIL;
mapped_depth = This->header.depth;
break;
case IMAGETYPE_GRAYSCALE:
case IMAGETYPE_GRAYSCALE|IMAGETYPE_RLE:
if (This->header.colormap_type != 0)
hr = E_FAIL;
mapped_depth = 0;
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 & 0xc0) != 0)
hr = E_FAIL;
attribute_bitcount = This->header.image_descriptor & IMAGE_ATTRIBUTE_BITCOUNT_MASK;
if (attribute_bitcount &&
!((mapped_depth == 32 && attribute_bitcount == 8) ||
(mapped_depth == 16 && attribute_bitcount == 1)))
hr = E_FAIL;
if (FAILED(hr))
{
WARN("bad tga header\n");
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;
/* Read footer if there is one */
seek.QuadPart = -sizeof(tga_footer);
hr = IStream_Seek(pIStream, seek, STREAM_SEEK_END, NULL);
if (SUCCEEDED(hr)) {
hr = IStream_Read(pIStream, &footer, sizeof(tga_footer), &bytesread);
if (SUCCEEDED(hr) && bytesread != sizeof(tga_footer))
{
TRACE("got only %u footer bytes\n", bytesread);
hr = E_FAIL;
}
if (memcmp(footer.magic, tga_footer_magic, sizeof(tga_footer_magic)) == 0)
{
This->extension_area_offset = footer.extension_area_offset;
This->developer_directory_offset = footer.developer_directory_offset;
}
else
{
This->extension_area_offset = 0;
This->developer_directory_offset = 0;
}
}
else
{
/* File is too small to have a footer. */
This->extension_area_offset = 0;
This->developer_directory_offset = 0;
hr = S_OK;
}
if (This->extension_area_offset)
{
seek.QuadPart = This->extension_area_offset;
hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto end;
hr = IStream_Read(pIStream, &This->extension_area, sizeof(tga_extension_area), &bytesread);
if (SUCCEEDED(hr) && bytesread != sizeof(tga_extension_area))
{
TRACE("got only %u extension area bytes\n", bytesread);
hr = E_FAIL;
}
if (SUCCEEDED(hr) && This->extension_area.size < 495)
{
TRACE("extension area is only %u bytes long\n", This->extension_area.size);
hr = E_FAIL;
}
if (FAILED(hr)) goto end;
}
IStream_AddRef(pIStream);
This->stream = pIStream;
This->initialized = TRUE;
end:
LeaveCriticalSection(&This->lock);
return hr;
}
static HRESULT WINAPI TgaDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
GUID *pguidContainerFormat)
{
memcpy(pguidContainerFormat, &GUID_WineContainerFormatTga, sizeof(GUID));
return S_OK;
}
static HRESULT WINAPI TgaDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
IWICBitmapDecoderInfo **ppIDecoderInfo)
{
HRESULT hr;
IWICComponentInfo *compinfo;
TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
hr = CreateComponentInfo(&CLSID_WineTgaDecoder, &compinfo);
if (FAILED(hr)) return hr;
hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
(void**)ppIDecoderInfo);
IWICComponentInfo_Release(compinfo);
return hr;
}
static HRESULT WINAPI TgaDecoder_CopyPalette(IWICBitmapDecoder *iface,
IWICPalette *pIPalette)
{
FIXME("(%p,%p): stub\n", iface, pIPalette);
return E_NOTIMPL;
}
static HRESULT WINAPI TgaDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
return E_NOTIMPL;
}
static HRESULT WINAPI TgaDecoder_GetPreview(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIBitmapSource)
{
FIXME("(%p,%p): stub\n", iface, ppIBitmapSource);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI TgaDecoder_GetColorContexts(IWICBitmapDecoder *iface,
UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
{
FIXME("(%p,%u,%p,%p): stub\n", iface, cCount, ppIColorContexts, pcActualCount);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI TgaDecoder_GetThumbnail(IWICBitmapDecoder *iface,
IWICBitmapSource **ppIThumbnail)
{
FIXME("(%p,%p): stub\n", iface, ppIThumbnail);
return WINCODEC_ERR_CODECNOTHUMBNAIL;
}
static HRESULT WINAPI TgaDecoder_GetFrameCount(IWICBitmapDecoder *iface,
UINT *pCount)
{
*pCount = 1;
return S_OK;
}
static HRESULT WINAPI TgaDecoder_GetFrame(IWICBitmapDecoder *iface,
UINT index, IWICBitmapFrameDecode **ppIBitmapFrame)
{
TgaDecoder *This = impl_from_IWICBitmapDecoder(iface);
TRACE("(%p,%p)\n", iface, ppIBitmapFrame);
if (!This->initialized) return WINCODEC_ERR_NOTINITIALIZED;
if (index != 0) return E_INVALIDARG;
IWICBitmapDecoder_AddRef(iface);
*ppIBitmapFrame = &This->IWICBitmapFrameDecode_iface;
return S_OK;
}
static const IWICBitmapDecoderVtbl TgaDecoder_Vtbl = {
TgaDecoder_QueryInterface,
TgaDecoder_AddRef,
TgaDecoder_Release,
TgaDecoder_QueryCapability,
TgaDecoder_Initialize,
TgaDecoder_GetContainerFormat,
TgaDecoder_GetDecoderInfo,
TgaDecoder_CopyPalette,
TgaDecoder_GetMetadataQueryReader,
TgaDecoder_GetPreview,
TgaDecoder_GetColorContexts,
TgaDecoder_GetThumbnail,
TgaDecoder_GetFrameCount,
TgaDecoder_GetFrame
};
static HRESULT WINAPI TgaDecoder_Frame_QueryInterface(IWICBitmapFrameDecode *iface, REFIID iid,
void **ppv)
{
TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) ||
IsEqualIID(&IID_IWICBitmapSource, iid) ||
IsEqualIID(&IID_IWICBitmapFrameDecode, iid))
{
*ppv = iface;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI TgaDecoder_Frame_AddRef(IWICBitmapFrameDecode *iface)
{
TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
return IWICBitmapDecoder_AddRef(&This->IWICBitmapDecoder_iface);
}
static ULONG WINAPI TgaDecoder_Frame_Release(IWICBitmapFrameDecode *iface)
{
TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
return IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
}
static HRESULT WINAPI TgaDecoder_Frame_GetSize(IWICBitmapFrameDecode *iface,
UINT *puiWidth, UINT *puiHeight)
{
TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
*puiWidth = This->header.width;
*puiHeight = This->header.height;
TRACE("(%p)->(%u,%u)\n", iface, *puiWidth, *puiHeight);
return S_OK;
}
static HRESULT WINAPI TgaDecoder_Frame_GetPixelFormat(IWICBitmapFrameDecode *iface,
WICPixelFormatGUID *pPixelFormat)
{
TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
int attribute_bitcount;
byte attribute_type;
TRACE("(%p,%p)\n", iface, pPixelFormat);
attribute_bitcount = This->header.image_descriptor & IMAGE_ATTRIBUTE_BITCOUNT_MASK;
if (attribute_bitcount && This->extension_area_offset)
attribute_type = This->extension_area.attributes_type;
else if (attribute_bitcount)
attribute_type = ATTRIBUTE_ALPHA;
else
attribute_type = ATTRIBUTE_NO_ALPHA;
switch (This->header.image_type & ~IMAGETYPE_RLE)
{
case IMAGETYPE_COLORMAPPED:
switch (This->header.depth)
{
case 8:
memcpy(pPixelFormat, &GUID_WICPixelFormat8bppIndexed, sizeof(GUID));
break;
default:
FIXME("Unhandled indexed color depth %u\n", This->header.depth);
return E_NOTIMPL;
}
break;
case IMAGETYPE_TRUECOLOR:
switch (This->header.depth)
{
case 16:
switch (attribute_type)
{
case ATTRIBUTE_NO_ALPHA:
case ATTRIBUTE_UNDEFINED:
case ATTRIBUTE_UNDEFINED_PRESERVE:
memcpy(pPixelFormat, &GUID_WICPixelFormat16bppBGR555, sizeof(GUID));
break;
case ATTRIBUTE_ALPHA:
case ATTRIBUTE_PALPHA:
memcpy(pPixelFormat, &GUID_WICPixelFormat16bppBGRA5551, sizeof(GUID));
break;
default:
FIXME("Unhandled 16-bit attribute type %u\n", attribute_type);
return E_NOTIMPL;
}
break;
case 24:
memcpy(pPixelFormat, &GUID_WICPixelFormat24bppBGR, sizeof(GUID));
break;
case 32:
switch (attribute_type)
{
case ATTRIBUTE_NO_ALPHA:
case ATTRIBUTE_UNDEFINED:
case ATTRIBUTE_UNDEFINED_PRESERVE:
memcpy(pPixelFormat, &GUID_WICPixelFormat32bppBGR, sizeof(GUID));
break;
case ATTRIBUTE_ALPHA:
memcpy(pPixelFormat, &GUID_WICPixelFormat32bppBGRA, sizeof(GUID));
break;
case ATTRIBUTE_PALPHA:
memcpy(pPixelFormat, &GUID_WICPixelFormat32bppPBGRA, sizeof(GUID));
break;
default:
FIXME("Unhandled 32-bit attribute type %u\n", attribute_type);
return E_NOTIMPL;
}
break;
default:
FIXME("Unhandled truecolor depth %u\n", This->header.depth);
return E_NOTIMPL;
}
break;
case IMAGETYPE_GRAYSCALE:
switch (This->header.depth)
{
case 8:
memcpy(pPixelFormat, &GUID_WICPixelFormat8bppGray, sizeof(GUID));
break;
case 16:
memcpy(pPixelFormat, &GUID_WICPixelFormat16bppGray, sizeof(GUID));
break;
default:
FIXME("Unhandled grayscale depth %u\n", This->header.depth);
return E_NOTIMPL;
}
break;
default:
ERR("Unknown image type %u\n", This->header.image_type);
return E_FAIL;
}
return S_OK;
}
static HRESULT WINAPI TgaDecoder_Frame_GetResolution(IWICBitmapFrameDecode *iface,
double *pDpiX, double *pDpiY)
{
FIXME("(%p,%p,%p): stub\n", iface, pDpiX, pDpiY);
return E_NOTIMPL;
}
static HRESULT WINAPI TgaDecoder_Frame_CopyPalette(IWICBitmapFrameDecode *iface,
IWICPalette *pIPalette)
{
TgaDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
HRESULT hr=S_OK;
WICColor colors[256], *color;
BYTE *colormap_data;
WORD *wcolormap_data;
DWORD *dwcolormap_data;
LARGE_INTEGER seek;
ULONG bytesread;
int depth, attribute_bitcount, attribute_type;
int i;
TRACE("(%p,%p)\n", iface, pIPalette);
if (!This->colormap_length)
{
WARN("no colormap present in this file\n");
return WINCODEC_ERR_PALETTEUNAVAILABLE;
}
if (This->header.colormap_firstentry + This->header.colormap_length > 256)
{
FIXME("cannot read colormap with %i entries starting at %i\n",
This->header.colormap_firstentry + This->header.colormap_length,
This->header.colormap_firstentry);
return E_FAIL;
}
colormap_data = HeapAlloc(GetProcessHeap(), 0, This->colormap_length);
if (!colormap_data) return E_OUTOFMEMORY;
wcolormap_data = (WORD*)colormap_data;
dwcolormap_data = (DWORD*)colormap_data;
EnterCriticalSection(&This->lock);
seek.QuadPart = This->colormap_offset;
hr = IStream_Seek(This->stream, seek, STREAM_SEEK_SET, NULL);
if (SUCCEEDED(hr))
{
hr = IStream_Read(This->stream, colormap_data, This->colormap_length, &bytesread);
if (SUCCEEDED(hr) && bytesread != This->colormap_length)
{
WARN("expected %i bytes in colormap, got %i\n", This->colormap_length, bytesread);
hr = E_FAIL;
}
}
LeaveCriticalSection(&This->lock);
if (SUCCEEDED(hr))
{
attribute_bitcount = This->header.image_descriptor & IMAGE_ATTRIBUTE_BITCOUNT_MASK;
if (attribute_bitcount && This->extension_area_offset)
attribute_type = This->extension_area.attributes_type;
else if (attribute_bitcount)
attribute_type = ATTRIBUTE_ALPHA;
else
attribute_type = ATTRIBUTE_NO_ALPHA;
depth = This->header.colormap_entrysize;
if (depth == 15)
{
depth = 16;
attribute_type = ATTRIBUTE_NO_ALPHA;
}
memset(colors, 0, sizeof(colors));
color = &colors[This->header.colormap_firstentry];
/* Colormap entries can be in any truecolor format, and we have to convert them. */
switch (depth)
{
case 16:
switch (attribute_type)
{
case ATTRIBUTE_NO_ALPHA:
case ATTRIBUTE_UNDEFINED:
case ATTRIBUTE_UNDEFINED_PRESERVE:
for (i=0; i<This->header.colormap_length; i++)
{
WORD srcval = wcolormap_data[i];
*color++=0xff000000 | /* constant 255 alpha */
((srcval << 9) & 0xf80000) | /* r */
((srcval << 4) & 0x070000) | /* r - 3 bits */
((srcval << 6) & 0x00f800) | /* g */
((srcval << 1) & 0x000700) | /* g - 3 bits */
((srcval << 3) & 0x0000f8) | /* b */
((srcval >> 2) & 0x000007); /* b - 3 bits */
}
break;
case ATTRIBUTE_ALPHA:
case ATTRIBUTE_PALPHA:
for (i=0; i<This->header.colormap_length; i++)
{
WORD srcval = wcolormap_data[i];
*color++=((srcval & 0x8000) ? 0xff000000 : 0) | /* alpha */
((srcval << 9) & 0xf80000) | /* r */
((srcval << 4) & 0x070000) | /* r - 3 bits */
((srcval << 6) & 0x00f800) | /* g */
((srcval << 1) & 0x000700) | /* g - 3 bits */
((srcval << 3) & 0x0000f8) | /* b */
((srcval >> 2) & 0x000007); /* b - 3 bits */
}
break;
default:
FIXME("Unhandled 16-bit attribute type %u\n", attribute_type);
hr = E_NOTIMPL;
}
break;
case 24:
for (i=0; i<This->header.colormap_length; i++)
{
*color++=0xff000000 | /* alpha */
colormap_data[i*3+2] | /* red */
colormap_data[i*3+1] | /* green */
colormap_data[i*3]; /* blue */
}
break;
case 32:
switch (attribute_type)
{
case ATTRIBUTE_NO_ALPHA:
case ATTRIBUTE_UNDEFINED:
case ATTRIBUTE_UNDEFINED_PRESERVE:
for (i=0; i<This->header.colormap_length; i++)
*color++=dwcolormap_data[i]|0xff000000;
break;
case ATTRIBUTE_ALPHA:
for (i=0; i<This->header.colormap_length; i++)
*color++=dwcolormap_data[i];
break;
case ATTRIBUTE_PALPHA:
/* FIXME: Unpremultiply alpha */
default:
FIXME("Unhandled 16-bit attribute type %u\n", attribute_type);
hr = E_NOTIMPL;
}
break;
default:
FIXME("Unhandled truecolor depth %u\n", This->header.depth);
hr = E_NOTIMPL;
}
}
HeapFree(GetProcessHeap(), 0, colormap_data);
if (SUCCEEDED(hr))
hr = IWICPalette_InitializeCustom(pIPalette, colors, 256);
return hr;
}
static HRESULT TgaDecoder_ReadRLE(TgaDecoder *This, BYTE *imagebits, int datasize)
{
int i=0, j, bytesperpixel;
ULONG bytesread;
HRESULT hr=S_OK;
bytesperpixel = This->header.depth / 8;
while (i<datasize)
{
BYTE rc;
int count, size;
BYTE pixeldata[4];
hr = IStream_Read(This->stream, &rc, 1, &bytesread);
if (bytesread != 1) hr = E_FAIL;
if (FAILED(hr)) break;
count = (rc&0x7f)+1;
size = count * bytesperpixel;
if (size + i > datasize)
{
WARN("RLE packet too large\n");
hr = E_FAIL;
break;
}
if (rc&0x80)
{
/* Run-length packet */
hr = IStream_Read(This->stream, pixeldata, bytesperpixel, &bytesread);
if (bytesread != bytesperpixel) hr = E_FAIL;
if (FAILED(hr)) break;
if (bytesperpixel == 1)
memset(&imagebits[i], pixeldata[0], count);
else
{
for (j=0; j<count; j++)
memcpy(&imagebits[i+j*bytesperpixel], pixeldata, bytesperpixel);
}
}
else
{
/* Raw packet */
hr = IStream_Read(This->stream, &imagebits[i], size, &bytesread);
if (bytesread != size) hr = E_FAIL;
if (FAILED(hr)) break;
}
i += size;
}
return hr;
}
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)
{
hr = TgaDecoder_ReadRLE(This, This->imagebits, datasize);
}
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)
{
TgaDecoder *This = impl_from_IWICBitmapFrameDecode(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,
IWICMetadataQueryReader **ppIMetadataQueryReader)
{
FIXME("(%p,%p): stub\n", iface, ppIMetadataQueryReader);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI TgaDecoder_Frame_GetColorContexts(IWICBitmapFrameDecode *iface,
UINT cCount, IWICColorContext **ppIColorContexts, UINT *pcActualCount)
{
FIXME("(%p,%u,%p,%p): stub\n", iface, cCount, ppIColorContexts, pcActualCount);
return WINCODEC_ERR_UNSUPPORTEDOPERATION;
}
static HRESULT WINAPI TgaDecoder_Frame_GetThumbnail(IWICBitmapFrameDecode *iface,
IWICBitmapSource **ppIThumbnail)
{
FIXME("(%p,%p): stub\n", iface, ppIThumbnail);
return WINCODEC_ERR_CODECNOTHUMBNAIL;
}
static const IWICBitmapFrameDecodeVtbl TgaDecoder_Frame_Vtbl = {
TgaDecoder_Frame_QueryInterface,
TgaDecoder_Frame_AddRef,
TgaDecoder_Frame_Release,
TgaDecoder_Frame_GetSize,
TgaDecoder_Frame_GetPixelFormat,
TgaDecoder_Frame_GetResolution,
TgaDecoder_Frame_CopyPalette,
TgaDecoder_Frame_CopyPixels,
TgaDecoder_Frame_GetMetadataQueryReader,
TgaDecoder_Frame_GetColorContexts,
TgaDecoder_Frame_GetThumbnail
};
HRESULT TgaDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
{
TgaDecoder *This;
HRESULT ret;
TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
*ppv = NULL;
if (pUnkOuter) return CLASS_E_NOAGGREGATION;
This = HeapAlloc(GetProcessHeap(), 0, sizeof(TgaDecoder));
if (!This) return E_OUTOFMEMORY;
This->IWICBitmapDecoder_iface.lpVtbl = &TgaDecoder_Vtbl;
This->IWICBitmapFrameDecode_iface.lpVtbl = &TgaDecoder_Frame_Vtbl;
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");
ret = IWICBitmapDecoder_QueryInterface(&This->IWICBitmapDecoder_iface, iid, ppv);
IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
return ret;
}
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