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windowscodecs: Add support for 4bps 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>
feature/deterministic
Dmitry Timoshkov 2020-04-21 12:02:15 +08:00 committed by Alexandre Julliard
parent d5830ff9bd
commit 0cd8502b49
1 changed files with 39 additions and 0 deletions
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39
dlls/windowscodecs/tiffformat.c
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@ -1147,6 +1147,45 @@ static HRESULT TiffFrameDecode_ReadTile(TiffFrameDecode *This, UINT tile_x, UINT
HeapFree(GetProcessHeap(), 0, srcdata);
}
/* 4bps RGBA */
else if (This->decode_info.source_bpp == 4 && 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 * 3 + 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;
/* 1 source byte expands to 2 BGRA samples */
for (x = 0; x < This->decode_info.tile_width; x += 2)
{
dst[0] = (src[0] & 0x20) ? 0xff : 0; /* B */
dst[1] = (src[0] & 0x40) ? 0xff : 0; /* G */
dst[2] = (src[0] & 0x80) ? 0xff : 0; /* R */
dst[3] = (src[0] & 0x10) ? 0xff : 0; /* A */
if (x + 1 < This->decode_info.tile_width)
{
dst[4] = (src[0] & 0x02) ? 0xff : 0; /* B */
dst[5] = (src[0] & 0x04) ? 0xff : 0; /* G */
dst[6] = (src[0] & 0x08) ? 0xff : 0; /* R */
dst[7] = (src[0] & 0x01) ? 0xff : 0; /* A */
}
src++;
dst += 8;
}
}
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)
{