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Allowed drops from less privileged processes.

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By default, UAC will prevent less privileged processes from sending
these messages.  This resolves that on Windows 7 and later.  Windows
Vista is still affected by this issue, as it has UAC but lacks
ChangeWindowMessageFilterEx.

Fixes #227.
This commit is contained in:
Camilla Berglund 2014-02-10 15:03:23 +01:00
parent 6fef0f1351
commit cf177905e5
3 changed files with 29 additions and 0 deletions
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2
src/win32_init.c
View File

@ -96,6 +96,8 @@ static GLboolean initLibraries(void)
{
_glfw.win32.user32.SetProcessDPIAware = (SETPROCESSDPIAWARE_T)
GetProcAddress(_glfw.win32.user32.instance, "SetProcessDPIAware");
_glfw.win32.user32.ChangeWindowMessageFilterEx = (CHANGEWINDOWMESSAGEFILTEREX_T)
GetProcAddress(_glfw.win32.user32.instance, "ChangeWindowMessageFilterEx");
}
_glfw.win32.dwmapi.instance = LoadLibrary(L"dwmapi.dll");

17
src/win32_platform.h
View File

@ -77,6 +77,20 @@
#ifndef WM_DWMCOMPOSITIONCHANGED
#define WM_DWMCOMPOSITIONCHANGED 0x031E
#endif
#ifndef WM_COPYGLOBALDATA
#define WM_COPYGLOBALDATA 0x0049
#endif
#ifndef MSGFLT_ALLOW
#define MSGFLT_ALLOW 1
#endif
#if defined(__MINGW32__)
typedef struct tagCHANGEFILTERSTRUCT
{
DWORD cbSize;
DWORD ExtStatus;
} CHANGEFILTERSTRUCT, *PCHANGEFILTERSTRUCT;
#endif /*__MINGW32__*/
//========================================================================
@ -107,7 +121,9 @@ typedef DWORD (WINAPI * TIMEGETTIME_T) (void);
// user32.dll function pointer typedefs
typedef BOOL (WINAPI * SETPROCESSDPIAWARE_T)(void);
typedef BOOL (WINAPI * CHANGEWINDOWMESSAGEFILTEREX_T)(HWND,UINT,DWORD,PCHANGEFILTERSTRUCT);
#define _glfw_SetProcessDPIAware _glfw.win32.user32.SetProcessDPIAware
#define _glfw_ChangeWindowMessageFilterEx _glfw.win32.user32.ChangeWindowMessageFilterEx
// dwmapi.dll function pointer typedefs
typedef HRESULT (WINAPI * DWMISCOMPOSITIONENABLED_T)(BOOL*);
@ -192,6 +208,7 @@ typedef struct _GLFWlibraryWin32
struct {
HINSTANCE instance;
SETPROCESSDPIAWARE_T SetProcessDPIAware;
CHANGEWINDOWMESSAGEFILTEREX_T ChangeWindowMessageFilterEx;
} user32;
// dwmapi.dll

10
src/win32_window.c
View File

@ -901,6 +901,16 @@ static int createWindow(_GLFWwindow* window,
free(wideTitle);
if (_glfw_ChangeWindowMessageFilterEx)
{
_glfw_ChangeWindowMessageFilterEx(window->win32.handle,
WM_DROPFILES, MSGFLT_ALLOW, NULL);
_glfw_ChangeWindowMessageFilterEx(window->win32.handle,
WM_COPYDATA, MSGFLT_ALLOW, NULL);
_glfw_ChangeWindowMessageFilterEx(window->win32.handle,
WM_COPYGLOBALDATA, MSGFLT_ALLOW, NULL);
}
DragAcceptFiles(window->win32.handle, TRUE);
if (!window->win32.handle)