[PATCH 4/9] windowscodecs: Add support for 3bps RGB format to TIFF decoder.
Dmitry Timoshkov
dmitry at baikal.ru
Mon Apr 20 23:02:08 CDT 2020
Signed-off-by: Dmitry Timoshkov <dmitry at baikal.ru>
---
dlls/windowscodecs/tiffformat.c | 78 +++++++++++++++++++++++++++++++--
1 file changed, 75 insertions(+), 3 deletions(-)
diff --git a/dlls/windowscodecs/tiffformat.c b/dlls/windowscodecs/tiffformat.c
index 646bcf3822..d6773d22f2 100644
--- a/dlls/windowscodecs/tiffformat.c
+++ b/dlls/windowscodecs/tiffformat.c
@@ -407,8 +407,6 @@ static HRESULT tiff_get_decode_info(TIFF *tiff, tiff_decode_info *decode_info)
}
break;
case 2: /* RGB */
- decode_info->bpp = bps * samples;
-
if (samples == 4)
{
ret = pTIFFGetField(tiff, TIFFTAG_EXTRASAMPLES, &extra_sample_count, &extra_samples);
@@ -425,8 +423,11 @@ static HRESULT tiff_get_decode_info(TIFF *tiff, tiff_decode_info *decode_info)
return E_FAIL;
}
+ decode_info->bpp = max(bps, 8) * samples;
+ decode_info->source_bpp = bps * samples;
switch(bps)
{
+ case 1:
case 8:
decode_info->reverse_bgr = 1;
if (samples == 3)
@@ -1039,8 +1040,79 @@ static HRESULT TiffFrameDecode_ReadTile(TiffFrameDecode *This, UINT tile_x, UINT
if (ret == -1)
return E_FAIL;
+ /* 3bps RGB */
+ if (This->decode_info.source_bpp == 3 && This->decode_info.samples == 3 && This->decode_info.bpp == 24)
+ {
+ 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 * 3;
+
+ for (x = 0; x < This->decode_info.tile_width; x += 8)
+ {
+ dst[2] = (src[0] & 0x80) ? 0xff : 0; /* R */
+ dst[1] = (src[0] & 0x40) ? 0xff : 0; /* G */
+ dst[0] = (src[0] & 0x20) ? 0xff : 0; /* B */
+ if (x + 1 < This->decode_info.tile_width)
+ {
+ dst[5] = (src[0] & 0x10) ? 0xff : 0; /* R */
+ dst[4] = (src[0] & 0x08) ? 0xff : 0; /* G */
+ dst[3] = (src[0] & 0x04) ? 0xff : 0; /* B */
+ }
+ if (x + 2 < This->decode_info.tile_width)
+ {
+ dst[8] = (src[0] & 0x02) ? 0xff : 0; /* R */
+ dst[7] = (src[0] & 0x01) ? 0xff : 0; /* G */
+ dst[6] = (src[1] & 0x80) ? 0xff : 0; /* B */
+ }
+ if (x + 3 < This->decode_info.tile_width)
+ {
+ dst[11] = (src[1] & 0x40) ? 0xff : 0; /* R */
+ dst[10] = (src[1] & 0x20) ? 0xff : 0; /* G */
+ dst[9] = (src[1] & 0x10) ? 0xff : 0; /* B */
+ }
+ if (x + 4 < This->decode_info.tile_width)
+ {
+ dst[14] = (src[1] & 0x08) ? 0xff : 0; /* R */
+ dst[13] = (src[1] & 0x04) ? 0xff : 0; /* G */
+ dst[12] = (src[1] & 0x02) ? 0xff : 0; /* B */
+ }
+ if (x + 5 < This->decode_info.tile_width)
+ {
+ dst[17] = (src[1] & 0x01) ? 0xff : 0; /* R */
+ dst[16] = (src[2] & 0x80) ? 0xff : 0; /* G */
+ dst[15] = (src[2] & 0x40) ? 0xff : 0; /* B */
+ }
+ if (x + 6 < This->decode_info.tile_width)
+ {
+ dst[20] = (src[2] & 0x20) ? 0xff : 0; /* R */
+ dst[19] = (src[2] & 0x10) ? 0xff : 0; /* G */
+ dst[18] = (src[2] & 0x08) ? 0xff : 0; /* B */
+ }
+ if (x + 7 < This->decode_info.tile_width)
+ {
+ dst[23] = (src[2] & 0x04) ? 0xff : 0; /* R */
+ dst[22] = (src[2] & 0x02) ? 0xff : 0; /* G */
+ dst[21] = (src[2] & 0x01) ? 0xff : 0; /* B */
+ }
+ src += 3;
+ dst += 24;
+ }
+ }
+
+ HeapFree(GetProcessHeap(), 0, srcdata);
+ }
/* 8bpp grayscale with extra alpha */
- if (This->decode_info.source_bpp == 16 && This->decode_info.samples == 2 && This->decode_info.bpp == 32)
+ else if (This->decode_info.source_bpp == 16 && This->decode_info.samples == 2 && This->decode_info.bpp == 32)
{
BYTE *src;
DWORD *dst, count = This->decode_info.tile_width * This->decode_info.tile_height;
--
2.25.2
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