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windowscodecs: Add support for 16bps RGBA format to TIFF decoder. 

Signed-off-by: Dmitry Timoshkov <dmitry@baikal.ru>
Signed-off-by: Vincent Povirk <vincent@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Dmitry Timoshkov 2020-04-21 12:02:21 +08:00 committed by Alexandre Julliard
parent 0cd8502b49
commit 3b9560c6f3
1 changed files with 30 additions and 0 deletions
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30
dlls/windowscodecs/tiffformat.c
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@ -1186,6 +1186,36 @@ static HRESULT TiffFrameDecode_ReadTile(TiffFrameDecode *This, UINT tile_x, UINT
HeapFree(GetProcessHeap(), 0, srcdata);
}
/* 16bps RGBA */
else if (This->decode_info.source_bpp == 16 && This->decode_info.samples == 4 && This->decode_info.bpp == 32)
{
BYTE *srcdata, *src, *dst;
DWORD x, y, count, width_bytes = (This->decode_info.tile_width * 12 + 7) / 8;
count = width_bytes * This->decode_info.tile_height;
srcdata = HeapAlloc(GetProcessHeap(), 0, count);
if (!srcdata) return E_OUTOFMEMORY;
memcpy(srcdata, This->cached_tile, count);
for (y = 0; y < This->decode_info.tile_height; y++)
{
src = srcdata + y * width_bytes;
dst = This->cached_tile + y * This->decode_info.tile_width * 4;
for (x = 0; x < This->decode_info.tile_width; x++)
{
dst[0] = ((src[1] & 0xf0) >> 4) * 17; /* B */
dst[1] = (src[0] & 0x0f) * 17; /* G */
dst[2] = ((src[0] & 0xf0) >> 4) * 17; /* R */
dst[3] = (src[1] & 0x0f) * 17; /* A */
src += 2;
dst += 4;
}
}
HeapFree(GetProcessHeap(), 0, srcdata);
}
/* 8bpp grayscale with extra alpha */
else if (This->decode_info.source_bpp == 16 && This->decode_info.samples == 2 && This->decode_info.bpp == 32)
{