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Add GLFW_TRANSPARENT attribute and documentation

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This completes support for window framebuffer transparency on Windows,
macOS and X11.  Note that the hint/attribute may be renamed before
release to clarify its relationship to GLFW_OPACITY.

Fixes #197.
Closes #1079.
Related to #663.
Related to #715.
Related to #723.
Related to #1078.
This commit is contained in:
Camilla Löwy
2017-09-18 18:10:57 +02:00
parent 93e66661d3
commit 32e78aeb2e
22 changed files with 322 additions and 318 deletions
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src/win32_platform.h
+22 -26
View File
@@ -100,6 +100,9 @@
#ifndef DISPLAY_DEVICE_ACTIVE
#define DISPLAY_DEVICE_ACTIVE 0x00000001
#endif
#ifndef _WIN32_WINNT_WINBLUE
#define _WIN32_WINNT_WINBLUE 0x0602
#endif
#if WINVER < 0x0601
typedef struct tagCHANGEFILTERSTRUCT
@@ -113,6 +116,18 @@ typedef struct tagCHANGEFILTERSTRUCT
#endif
#endif /*Windows 7*/
#if WINVER < 0x0600
#define DWM_BB_ENABLE 0x00000001
#define DWM_BB_BLURREGION 0x00000002
typedef struct
{
DWORD dwFlags;
BOOL fEnable;
HRGN hRgnBlur;
BOOL fTransitionOnMaximized;
} DWM_BLURBEHIND;
#endif /*Windows Vista*/
#ifndef DPI_ENUMS_DECLARED
typedef enum PROCESS_DPI_AWARENESS
{
@@ -122,30 +137,8 @@ typedef enum PROCESS_DPI_AWARENESS
} PROCESS_DPI_AWARENESS;
#endif /*DPI_ENUMS_DECLARED*/
#if !defined(_DWMAPI_H_)
#define DWM_BB_ENABLE 0x00000001
#define DWM_BB_BLURREGION 0x00000002
typedef struct
{
DWORD dwFlags;
BOOL fEnable;
HRGN hRgnBlur;
BOOL fTransitionOnMaximized;
} DWM_BLURBEHIND;
#endif
// HACK: Define versionhelpers.h functions manually as MinGW lacks the header
FORCEINLINE BOOL IsWindowsVersionOrGreater(WORD major, WORD minor, WORD sp)
{
OSVERSIONINFOEXW osvi = { sizeof(osvi), major, minor, 0, 0, {0}, sp };
DWORD mask = VER_MAJORVERSION | VER_MINORVERSION | VER_SERVICEPACKMAJOR;
ULONGLONG cond = VerSetConditionMask(0, VER_MAJORVERSION, VER_GREATER_EQUAL);
cond = VerSetConditionMask(cond, VER_MINORVERSION, VER_GREATER_EQUAL);
cond = VerSetConditionMask(cond, VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL);
return VerifyVersionInfoW(&osvi, mask, cond);
}
BOOL IsWindowsVersionOrGreater(WORD major, WORD minor, WORD sp);
#define IsWindowsVistaOrGreater() \
IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_VISTA), \
LOBYTE(_WIN32_WINNT_VISTA), 0)
@@ -216,10 +209,10 @@ typedef BOOL (WINAPI * PFN_ChangeWindowMessageFilterEx)(HWND,UINT,DWORD,PCHANGEF
// dwmapi.dll function pointer typedefs
typedef HRESULT (WINAPI * PFN_DwmIsCompositionEnabled)(BOOL*);
typedef HRESULT (WINAPI * PFN_DwmFlush)(VOID);
typedef HRESULT(WINAPI * DWMENABLEBLURBEHINDWINDOW_T)(HWND, const DWM_BLURBEHIND*);
typedef HRESULT(WINAPI * PFN_DwmEnableBlurBehindWindow)(HWND,const DWM_BLURBEHIND*);
#define DwmIsCompositionEnabled _glfw.win32.dwmapi.IsCompositionEnabled
#define DwmFlush _glfw.win32.dwmapi.Flush
#define _glfw_DwmEnableBlurBehindWindow _glfw.win32.dwmapi.DwmEnableBlurBehindWindow
#define DwmEnableBlurBehindWindow _glfw.win32.dwmapi.EnableBlurBehindWindow
// shcore.dll function pointer typedefs
typedef HRESULT (WINAPI * PFN_SetProcessDpiAwareness)(PROCESS_DPI_AWARENESS);
@@ -274,6 +267,8 @@ typedef struct _GLFWwindowWin32
GLFWbool frameAction;
GLFWbool iconified;
GLFWbool maximized;
// Whether to enable framebuffer transparency on DWM
GLFWbool transparent;
// The last received cursor position, regardless of source
int lastCursorPosX, lastCursorPosY;
@@ -325,7 +320,7 @@ typedef struct _GLFWlibraryWin32
HINSTANCE instance;
PFN_DwmIsCompositionEnabled IsCompositionEnabled;
PFN_DwmFlush Flush;
DWMENABLEBLURBEHINDWINDOW_T DwmEnableBlurBehindWindow;
PFN_DwmEnableBlurBehindWindow EnableBlurBehindWindow;
} dwmapi;
struct {
@@ -388,6 +383,7 @@ typedef struct _GLFWmutexWin32
GLFWbool _glfwRegisterWindowClassWin32(void);
void _glfwUnregisterWindowClassWin32(void);
GLFWbool _glfwIsCompositionEnabledWin32(void);
WCHAR* _glfwCreateWideStringFromUTF8Win32(const char* source);
char* _glfwCreateUTF8FromWideStringWin32(const WCHAR* source);