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win32: fix pasting screenshots taken with PrintScreen or Alt+PrintScreen

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These are found on the clipboard in the biCompression == BI_BITFIELDS &&
biBitCount >= 16 format. In this case the BITMAPINFOHEADER is followed
by three DWORD specifying the masks of the red green and blue components,
but bfOffBits was not being adjusted accordingly.

Based on Massimo's comment on bug 631384 and verified on
http://msdn.microsoft.com/en-us/library/dd183386%28v=VS.85%29.aspx

https://bugzilla.gnome.org/show_bug.cgi?id=631384
This commit is contained in:
Dieter Verfaillie 2011-11-04 09:44:35 +01:00 committed by Alexander Larsson
parent 4e10d9604b
commit 68d28aad97
1 changed files with 11 additions and 0 deletions
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11
gdk/win32/gdkselection-win32.c
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@ -721,6 +721,17 @@ _gdk_win32_display_convert_selection (GdkDisplay *display,
bi->biSize +
bi->biClrUsed * sizeof (RGBQUAD));
if (bi->biCompression == BI_BITFIELDS && bi->biBitCount >= 16)
{
/* Screenshots taken with PrintScreen or
* Alt + PrintScreen are found on the clipboard in
* this format. In this case the BITMAPINFOHEADER is
* followed by three DWORD specifying the masks of the
* red green and blue components, so adjust the offset
* accordingly. */
bf->bfOffBits += (3 * sizeof (DWORD));
}
memcpy ((char *) data + sizeof (BITMAPFILEHEADER),
bi,
data_length);