[RFC PATCH v4 4/7] win32u: fix return value of SetDIBitsToDevice for EMF DC.
Jinoh Kang
jinoh.kang.kr at gmail.com
Sat Oct 16 23:39:03 CDT 2021
Signed-off-by: Jinoh Kang <jinoh.kang.kr at gmail.com>
---
Notes:
In my local Windows 10 box, SetDIBitsToDevice seems to always
return *zero* when a top-down DIB is used as the source, even through
the EMRSETDIBITSDEVICE record is still emitted correctly.
As I couldn't find a reasonable explanation for this behaviour,
the top-down DIB case is left unmodified.
dlls/win32u/emfdrv.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/dlls/win32u/emfdrv.c b/dlls/win32u/emfdrv.c
index 395d51048d8..238f6359449 100644
--- a/dlls/win32u/emfdrv.c
+++ b/dlls/win32u/emfdrv.c
@@ -416,6 +416,15 @@ static INT CDECL EMFDRV_SetDIBitsToDevice( PHYSDEV dev, INT x_dst, INT y_dst, DW
UINT lines, const void *bits, BITMAPINFO *info,
UINT usage )
{
+ UINT src_height;
+
+ if (info->bmiHeader.biHeight >= 0)
+ {
+ src_height = (UINT)info->bmiHeader.biHeight;
+ if (src_height > y_src + height) src_height = y_src + height;
+ if (lines > src_height - startscan) lines = src_height - startscan;
+ }
+
/* FIXME: Update bound rect */
return lines;
}
--
2.31.1
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