[PATCH 2/2] windowscodecs/tiff: Use libjpeg for colorspace conversion YCbCr -> RGB.

[Nikolay Sivov]

From: Nikolay Sivov

Signed-off-by: Nikolay Sivov 
---
 dlls/windowscodecs/libtiff.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/dlls/windowscodecs/libtiff.c b/dlls/windowscodecs/libtiff.c
index 5c84629c871..60c5ffe3404 100644
--- a/dlls/windowscodecs/libtiff.c
+++ b/dlls/windowscodecs/libtiff.c
@@ -215,6 +215,18 @@ static HRESULT tiff_get_decode_info(TIFF *tiff, tiff_decode_info *decode_info)

TRACE("planar %u, photometric %u, samples %u, bps %u\n", planar, photometric, samples, bps);

+    if (photometric == PHOTOMETRIC_YCBCR)
+    {
+        uint16_t compress;
+
+        TIFFGetFieldDefaulted(tiff, TIFFTAG_COMPRESSION, &compress);
+        if (planar == PLANARCONFIG_CONTIG && compress == COMPRESSION_JPEG)
+        {
+            TIFFSetField(tiff, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB);
+            photometric = PHOTOMETRIC_RGB;
+        }
+    }
+
     switch(photometric)
     {
     case 0: /* WhiteIsZero */