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user32: Call the EnumDisplayMonitors callback using a wrapper. 

Signed-off-by: Ken Thomases <ken@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
oldstable
Ken Thomases 2016-03-23 21:46:32 -05:00 committed by Alexandre Julliard
parent 1010372778
commit 474196c746
1 changed files with 37 additions and 0 deletions
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37
dlls/user32/misc.c
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@ -20,6 +20,8 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdarg.h>
#include "windef.h"
@ -466,11 +468,46 @@ BOOL WINAPI GetMonitorInfoW(HMONITOR hMonitor, LPMONITORINFO lpMonitorInfo)
return ret;
}
#ifdef __i386__
/* Some apps pass a non-stdcall callback to EnumDisplayMonitors,
* so we need a small assembly wrapper to call it.
*/
struct enumdisplaymonitors_lparam
{
MONITORENUMPROC proc;
LPARAM lparam;
};
extern BOOL CALLBACK enumdisplaymonitors_callback_wrapper(HMONITOR monitor, HDC hdc, LPRECT rect, LPARAM lparam);
__ASM_STDCALL_FUNC( enumdisplaymonitors_callback_wrapper, 16,
"pushl %ebp\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
__ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
"movl %esp,%ebp\n\t"
__ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
"subl $8,%esp\n\t"
"movl 20(%ebp),%eax\n\t" /* struct enumdisplaymonitors_lparam *orig = (struct enumdisplaymonitors_lparam*)lparam */
"pushl 4(%eax)\n\t" /* push orig->lparam */
"pushl 16(%ebp)\n\t"
"pushl 12(%ebp)\n\t"
"pushl 8(%ebp)\n\t"
"call *(%eax)\n\t" /* call orig->proc */
"leave\n\t"
__ASM_CFI(".cfi_def_cfa %esp,4\n\t")
__ASM_CFI(".cfi_same_value %ebp\n\t")
"ret $16" )
#endif /* __i386__ */
/***********************************************************************
* EnumDisplayMonitors (USER32.@)
*/
BOOL WINAPI EnumDisplayMonitors( HDC hdc, LPRECT rect, MONITORENUMPROC proc, LPARAM lp )
{
#ifdef __i386__
struct enumdisplaymonitors_lparam orig = { proc, lp };
proc = enumdisplaymonitors_callback_wrapper;
lp = (LPARAM)&orig;
#endif
return USER_Driver->pEnumDisplayMonitors( hdc, rect, proc, lp );
}