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fix: handle better DwmEnableBlurBehindWindow

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This commit is contained in:
Christopher Pelloux 2016-03-01 17:00:55 -05:00
parent 25313317f0
commit fe81dd9899
3 changed files with 31 additions and 16 deletions
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22
src/wgl_context.c
View File

@ -493,6 +493,28 @@ GLFWbool _glfwCreateContextWGL(_GLFWwindow* window,
}
}
if (window->transparent) {
if (!isCompositionEnabled || !_glfw_DwmEnableBlurBehindWindow) {
window->transparent = GLFW_FALSE;
}
else
{
HRESULT hr = S_OK;
DWM_BLURBEHIND bb = { 0 };
bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
bb.hRgnBlur = CreateRectRgn(0, 0, -1, -1); // makes the window transparent
bb.fEnable = TRUE;
hr = _glfw_DwmEnableBlurBehindWindow(window->win32.handle, &bb);
if (!SUCCEEDED(hr)) {
window->transparent = GLFW_FALSE;
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Failed to enable blur behind window required for transparency");
}
}
}
return GLFW_TRUE;
}

12
src/win32_platform.h
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@ -120,6 +120,12 @@ typedef enum PROCESS_DPI_AWARENESS
} PROCESS_DPI_AWARENESS;
#endif /*DPI_ENUMS_DECLARED*/
#if !defined(_DWMAPI_H_)
// Blur behind data structures
#define DWM_BB_ENABLE 0x00000001 // fEnable has been specified
#define DWM_BB_BLURREGION 0x00000002 // hRgnBlur has been specified
#define DWM_BB_TRANSITIONONMAXIMIZED 0x00000004 // fTransitionOnMaximized has been specified
typedef struct _DWM_BLURBEHIND
{
DWORD dwFlags;
@ -127,31 +133,31 @@ typedef struct _DWM_BLURBEHIND
HRGN hRgnBlur;
BOOL fTransitionOnMaximized;
} DWM_BLURBEHIND, *PDWM_BLURBEHIND;
#endif
// winmm.dll function pointer typedefs
typedef MMRESULT (WINAPI * JOYGETDEVCAPS_T)(UINT,LPJOYCAPS,UINT);
typedef MMRESULT (WINAPI * JOYGETPOS_T)(UINT,LPJOYINFO);
typedef MMRESULT (WINAPI * JOYGETPOSEX_T)(UINT,LPJOYINFOEX);
typedef DWORD (WINAPI * TIMEGETTIME_T)(void);
typedef HRESULT(WINAPI * DWMENABLEBLURBEHINDWINDOW_T)(HWND, const DWM_BLURBEHIND*);
#define _glfw_joyGetDevCaps _glfw.win32.winmm.joyGetDevCaps
#define _glfw_joyGetPos _glfw.win32.winmm.joyGetPos
#define _glfw_joyGetPosEx _glfw.win32.winmm.joyGetPosEx
#define _glfw_timeGetTime _glfw.win32.winmm.timeGetTime
#define _glfw_DwmEnableBlurBehindWindow _glfw.win32.dwmapi.DwmEnableBlurBehindWindow
// 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
#define _glfw_DwmEnableBlurBehindWindow _glfw.win32.dwmapi.DwmEnableBlurBehindWindow
// dwmapi.dll function pointer typedefs
typedef HRESULT (WINAPI * DWMISCOMPOSITIONENABLED_T)(BOOL*);
typedef HRESULT (WINAPI * DWMFLUSH_T)(VOID);
typedef HRESULT (WINAPI * DWMENABLEBLURBEHINDWINDOW_T)(HWND, const DWM_BLURBEHIND*);
#define _glfw_DwmIsCompositionEnabled _glfw.win32.dwmapi.DwmIsCompositionEnabled
#define _glfw_DwmFlush _glfw.win32.dwmapi.DwmFlush
#define _glfw_DwmEnableBlurBehindWindow _glfw.win32.dwmapi.DwmEnableBlurBehindWindow
// shcore.dll function pointer typedefs
typedef HRESULT (WINAPI * SETPROCESSDPIAWARENESS_T)(PROCESS_DPI_AWARENESS);

13
src/win32_window.c
View File

@ -732,19 +732,6 @@ static int createWindow(_GLFWwindow* window, const _GLFWwndconfig* wndconfig)
window->win32.numer = GLFW_DONT_CARE;
window->win32.denom = GLFW_DONT_CARE;
// Accelerated transparent windows
// It currently doesn't support decorated windows.
// If decorated is required we just return an opaque window.
// Since DwmEnableBlurBehindWindow is supported since Vista,
// previous versions will simply get an opaque window.
if (!window->decorated && _glfw_DwmEnableBlurBehindWindow && window->transparent) {
DWM_BLURBEHIND bb = { 0 };
bb.dwFlags = 3; // DWM_BB_ENABLE | DWM_BB_BLURREGION
bb.hRgnBlur = CreateRectRgn(0, 0, -1, -1); // an invalid hRgnBlur makes the the window transparent
bb.fEnable = TRUE;
_glfw_DwmEnableBlurBehindWindow(window->win32.handle, &bb);
}
return GLFW_TRUE;
}