[PATCH 1/4] gdi32: Use the maximum number of colours when biClrUsed is zero.

[Zhiyi Zhang]

From: Zhiyi Zhang

Fix a regression from 225004e1. According to MSDN, if the biClrUsed field is zero, the bitmap should
use the maximum number of colours corresponding to the value of the biBitCount member for the
compression mode specified by biCompression.
---
 dlls/gdi32/emfdc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dlls/gdi32/emfdc.c b/dlls/gdi32/emfdc.c
index 098caff0c0b..1633d617bb9 100644
--- a/dlls/gdi32/emfdc.c
+++ b/dlls/gdi32/emfdc.c
@@ -319,6 +319,8 @@ static BOOL emf_parse_user_bitmapinfo( BITMAPINFOHEADER *dst, const BITMAPINFOHE
         UINT elm_size = coloruse == DIB_PAL_COLORS ? sizeof(WORD) : sizeof(DWORD);
         UINT colours = dst->biClrUsed;

+        if (!colours) colours = 1 << dst->biBitCount;
+
         /* Windows never truncates colour tables, even if they are
          * unnecessarily big (> 1<<bpp).  We emulate this behaviour. */