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windowscodecs: Implement CopyPalette for the TGA decoder.

This commit is contained in:
Vincent Povirk 2010-10-20 16:34:36 -05:00 committed by Alexandre Julliard
parent 38da464ed1
commit b26d789db2
1 changed files with 159 additions and 5 deletions
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164
dlls/windowscodecs/tgaformat.c
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@ -193,6 +193,7 @@ static HRESULT WINAPI TgaDecoder_Initialize(IWICBitmapDecoder *iface, IStream *p
LARGE_INTEGER seek;
tga_footer footer;
int attribute_bitcount;
int mapped_depth=0;
TRACE("(%p,%p,%u)\n", iface, pIStream, cacheOptions);
@ -228,16 +229,19 @@ static HRESULT WINAPI TgaDecoder_Initialize(IWICBitmapDecoder *iface, IStream *p
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;
@ -253,9 +257,8 @@ static HRESULT WINAPI TgaDecoder_Initialize(IWICBitmapDecoder *iface, IStream *p
attribute_bitcount = This->header.image_descriptor & IMAGE_ATTRIBUTE_BITCOUNT_MASK;
if (attribute_bitcount &&
!((This->header.image_type & IMAGETYPE_TRUECOLOR) &&
((This->header.depth == 32 && attribute_bitcount == 8) ||
(This->header.depth == 16 && attribute_bitcount == 1))))
!((mapped_depth == 32 && attribute_bitcount == 8) ||
(mapped_depth == 16 && attribute_bitcount == 1)))
hr = E_FAIL;
if (FAILED(hr))
@ -573,8 +576,159 @@ static HRESULT WINAPI TgaDecoder_Frame_GetResolution(IWICBitmapFrameDecode *ifac
static HRESULT WINAPI TgaDecoder_Frame_CopyPalette(IWICBitmapFrameDecode *iface,
IWICPalette *pIPalette)
{
FIXME("(%p,%p): stub\n", iface, pIPalette);
return E_NOTIMPL;
TgaDecoder *This = decoder_from_frame(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)