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glfw/src/win32_platform.h
Camilla Löwy 05dd2fa298 Win32: Disable fb transparency when it is broken 
On Windows 7, when GLFW framebuffer transparency and the DWM are enabled
but DWM transparency is disabled (i.e. when the Transparency setting is
disabled under Personalization > Color), the contents of the framebuffer
is combined with the last frame using additive blending instead of
replacing the previous contents.

This commit limits GLFW framebuffer transparency on Windows 7 to when
DWM transparency is enabled, removing the previous workaround of setting
a layered window color key that led to rendering artifacts.

Fixes #1512.
2020-07-29 15:21:45 +02:00

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//========================================================================
// GLFW 3.4 Win32 - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2019 Camilla Löwy <elmindreda@glfw.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
// We don't need all the fancy stuff
#ifndef NOMINMAX
#define NOMINMAX
#endif
#ifndef VC_EXTRALEAN
#define VC_EXTRALEAN
#endif
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
// This is a workaround for the fact that glfw3.h needs to export APIENTRY (for
// example to allow applications to correctly declare a GL_ARB_debug_output
// callback) but windows.h assumes no one will define APIENTRY before it does
#undef APIENTRY
// GLFW on Windows is Unicode only and does not work in MBCS mode
#ifndef UNICODE
#define UNICODE
#endif
// GLFW requires Windows XP or later
#if WINVER < 0x0501
#undef WINVER
#define WINVER 0x0501
#endif
#if _WIN32_WINNT < 0x0501
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0501
#endif
// GLFW uses DirectInput8 interfaces
#define DIRECTINPUT_VERSION 0x0800
// GLFW uses OEM cursor resources
#define OEMRESOURCE
#include <wctype.h>
#include <windows.h>
#include <dinput.h>
#include <xinput.h>
#include <dbt.h>
// HACK: Define macros that some windows.h variants don't
#ifndef WM_MOUSEHWHEEL
#define WM_MOUSEHWHEEL 0x020E
#endif
#ifndef WM_DWMCOMPOSITIONCHANGED
#define WM_DWMCOMPOSITIONCHANGED 0x031E
#endif
#ifndef WM_DWMCOLORIZATIONCOLORCHANGED
#define WM_DWMCOLORIZATIONCOLORCHANGED 0x0320
#endif
#ifndef WM_COPYGLOBALDATA
#define WM_COPYGLOBALDATA 0x0049
#endif
#ifndef WM_UNICHAR
#define WM_UNICHAR 0x0109
#endif
#ifndef UNICODE_NOCHAR
#define UNICODE_NOCHAR 0xFFFF
#endif
#ifndef WM_DPICHANGED
#define WM_DPICHANGED 0x02E0
#endif
#ifndef GET_XBUTTON_WPARAM
#define GET_XBUTTON_WPARAM(w) (HIWORD(w))
#endif
#ifndef EDS_ROTATEDMODE
#define EDS_ROTATEDMODE 0x00000004
#endif
#ifndef DISPLAY_DEVICE_ACTIVE
#define DISPLAY_DEVICE_ACTIVE 0x00000001
#endif
#ifndef _WIN32_WINNT_WINBLUE
#define _WIN32_WINNT_WINBLUE 0x0602
#endif
#ifndef _WIN32_WINNT_WIN8
#define _WIN32_WINNT_WIN8 0x0602
#endif
#ifndef WM_GETDPISCALEDSIZE
#define WM_GETDPISCALEDSIZE 0x02e4
#endif
#ifndef USER_DEFAULT_SCREEN_DPI
#define USER_DEFAULT_SCREEN_DPI 96
#endif
#ifndef OCR_HAND
#define OCR_HAND 32649
#endif
#if WINVER < 0x0601
typedef struct
{
DWORD cbSize;
DWORD ExtStatus;
} CHANGEFILTERSTRUCT;
#ifndef MSGFLT_ALLOW
#define MSGFLT_ALLOW 1
#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;
#else
#include <dwmapi.h>
#endif /*Windows Vista*/
#ifndef DPI_ENUMS_DECLARED
typedef enum
{
PROCESS_DPI_UNAWARE = 0,
PROCESS_SYSTEM_DPI_AWARE = 1,
PROCESS_PER_MONITOR_DPI_AWARE = 2
} PROCESS_DPI_AWARENESS;
typedef enum
{
MDT_EFFECTIVE_DPI = 0,
MDT_ANGULAR_DPI = 1,
MDT_RAW_DPI = 2,
MDT_DEFAULT = MDT_EFFECTIVE_DPI
} MONITOR_DPI_TYPE;
#endif /*DPI_ENUMS_DECLARED*/
#ifndef DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2
#define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 ((HANDLE) -4)
#endif /*DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2*/
// HACK: Define versionhelpers.h functions manually as MinGW lacks the header
#define IsWindowsVistaOrGreater() \
_glfwIsWindowsVersionOrGreaterWin32(HIBYTE(_WIN32_WINNT_VISTA), \
LOBYTE(_WIN32_WINNT_VISTA), 0)
#define IsWindows7OrGreater() \
_glfwIsWindowsVersionOrGreaterWin32(HIBYTE(_WIN32_WINNT_WIN7), \
LOBYTE(_WIN32_WINNT_WIN7), 0)
#define IsWindows8OrGreater() \
_glfwIsWindowsVersionOrGreaterWin32(HIBYTE(_WIN32_WINNT_WIN8), \
LOBYTE(_WIN32_WINNT_WIN8), 0)
#define IsWindows8Point1OrGreater() \
_glfwIsWindowsVersionOrGreaterWin32(HIBYTE(_WIN32_WINNT_WINBLUE), \
LOBYTE(_WIN32_WINNT_WINBLUE), 0)
#define _glfwIsWindows10AnniversaryUpdateOrGreaterWin32() \
_glfwIsWindows10BuildOrGreaterWin32(14393)
#define _glfwIsWindows10CreatorsUpdateOrGreaterWin32() \
_glfwIsWindows10BuildOrGreaterWin32(15063)
// HACK: Define macros that some xinput.h variants don't
#ifndef XINPUT_CAPS_WIRELESS
#define XINPUT_CAPS_WIRELESS 0x0002
#endif
#ifndef XINPUT_DEVSUBTYPE_WHEEL
#define XINPUT_DEVSUBTYPE_WHEEL 0x02
#endif
#ifndef XINPUT_DEVSUBTYPE_ARCADE_STICK
#define XINPUT_DEVSUBTYPE_ARCADE_STICK 0x03
#endif
#ifndef XINPUT_DEVSUBTYPE_FLIGHT_STICK
#define XINPUT_DEVSUBTYPE_FLIGHT_STICK 0x04
#endif
#ifndef XINPUT_DEVSUBTYPE_DANCE_PAD
#define XINPUT_DEVSUBTYPE_DANCE_PAD 0x05
#endif
#ifndef XINPUT_DEVSUBTYPE_GUITAR
#define XINPUT_DEVSUBTYPE_GUITAR 0x06
#endif
#ifndef XINPUT_DEVSUBTYPE_DRUM_KIT
#define XINPUT_DEVSUBTYPE_DRUM_KIT 0x08
#endif
#ifndef XINPUT_DEVSUBTYPE_ARCADE_PAD
#define XINPUT_DEVSUBTYPE_ARCADE_PAD 0x13
#endif
#ifndef XUSER_MAX_COUNT
#define XUSER_MAX_COUNT 4
#endif
// HACK: Define macros that some dinput.h variants don't
#ifndef DIDFT_OPTIONAL
#define DIDFT_OPTIONAL 0x80000000
#endif
// winmm.dll function pointer typedefs
typedef DWORD (WINAPI * PFN_timeGetTime)(void);
#define timeGetTime _glfw.win32.winmm.GetTime
// xinput.dll function pointer typedefs
typedef DWORD (WINAPI * PFN_XInputGetCapabilities)(DWORD,DWORD,XINPUT_CAPABILITIES*);
typedef DWORD (WINAPI * PFN_XInputGetState)(DWORD,XINPUT_STATE*);
#define XInputGetCapabilities _glfw.win32.xinput.GetCapabilities
#define XInputGetState _glfw.win32.xinput.GetState
// dinput8.dll function pointer typedefs
typedef HRESULT (WINAPI * PFN_DirectInput8Create)(HINSTANCE,DWORD,REFIID,LPVOID*,LPUNKNOWN);
#define DirectInput8Create _glfw.win32.dinput8.Create
// user32.dll function pointer typedefs
typedef BOOL (WINAPI * PFN_SetProcessDPIAware)(void);
typedef BOOL (WINAPI * PFN_ChangeWindowMessageFilterEx)(HWND,UINT,DWORD,CHANGEFILTERSTRUCT*);
typedef BOOL (WINAPI * PFN_EnableNonClientDpiScaling)(HWND);
typedef BOOL (WINAPI * PFN_SetProcessDpiAwarenessContext)(HANDLE);
typedef UINT (WINAPI * PFN_GetDpiForWindow)(HWND);
typedef BOOL (WINAPI * PFN_AdjustWindowRectExForDpi)(LPRECT,DWORD,BOOL,DWORD,UINT);
#define SetProcessDPIAware _glfw.win32.user32.SetProcessDPIAware_
#define ChangeWindowMessageFilterEx _glfw.win32.user32.ChangeWindowMessageFilterEx_
#define EnableNonClientDpiScaling _glfw.win32.user32.EnableNonClientDpiScaling_
#define SetProcessDpiAwarenessContext _glfw.win32.user32.SetProcessDpiAwarenessContext_
#define GetDpiForWindow _glfw.win32.user32.GetDpiForWindow_
#define AdjustWindowRectExForDpi _glfw.win32.user32.AdjustWindowRectExForDpi_
// dwmapi.dll function pointer typedefs
typedef HRESULT (WINAPI * PFN_DwmIsCompositionEnabled)(BOOL*);
typedef HRESULT (WINAPI * PFN_DwmFlush)(VOID);
typedef HRESULT(WINAPI * PFN_DwmEnableBlurBehindWindow)(HWND,const DWM_BLURBEHIND*);
typedef HRESULT (WINAPI * PFN_DwmGetColorizationColor)(DWORD*,BOOL*);
#define DwmIsCompositionEnabled _glfw.win32.dwmapi.IsCompositionEnabled
#define DwmFlush _glfw.win32.dwmapi.Flush
#define DwmEnableBlurBehindWindow _glfw.win32.dwmapi.EnableBlurBehindWindow
#define DwmGetColorizationColor _glfw.win32.dwmapi.GetColorizationColor
// shcore.dll function pointer typedefs
typedef HRESULT (WINAPI * PFN_SetProcessDpiAwareness)(PROCESS_DPI_AWARENESS);
typedef HRESULT (WINAPI * PFN_GetDpiForMonitor)(HMONITOR,MONITOR_DPI_TYPE,UINT*,UINT*);
#define SetProcessDpiAwareness _glfw.win32.shcore.SetProcessDpiAwareness_
#define GetDpiForMonitor _glfw.win32.shcore.GetDpiForMonitor_
// ntdll.dll function pointer typedefs
typedef LONG (WINAPI * PFN_RtlVerifyVersionInfo)(OSVERSIONINFOEXW*,ULONG,ULONGLONG);
#define RtlVerifyVersionInfo _glfw.win32.ntdll.RtlVerifyVersionInfo_
typedef VkFlags VkWin32SurfaceCreateFlagsKHR;
typedef struct VkWin32SurfaceCreateInfoKHR
{
VkStructureType sType;
const void* pNext;
VkWin32SurfaceCreateFlagsKHR flags;
HINSTANCE hinstance;
HWND hwnd;
} VkWin32SurfaceCreateInfoKHR;
typedef VkResult (APIENTRY *PFN_vkCreateWin32SurfaceKHR)(VkInstance,const VkWin32SurfaceCreateInfoKHR*,const VkAllocationCallbacks*,VkSurfaceKHR*);
typedef VkBool32 (APIENTRY *PFN_vkGetPhysicalDeviceWin32PresentationSupportKHR)(VkPhysicalDevice,uint32_t);
#include "win32_joystick.h"
#include "wgl_context.h"
#if !defined(_GLFW_WNDCLASSNAME)
#define _GLFW_WNDCLASSNAME L"GLFW30"
#endif
#define _glfw_dlopen(name) LoadLibraryA(name)
#define _glfw_dlclose(handle) FreeLibrary((HMODULE) handle)
#define _glfw_dlsym(handle, name) GetProcAddress((HMODULE) handle, name)
#define _GLFW_PLATFORM_WINDOW_STATE _GLFWwindowWin32 win32
#define _GLFW_PLATFORM_LIBRARY_WINDOW_STATE _GLFWlibraryWin32 win32
#define _GLFW_PLATFORM_LIBRARY_TIMER_STATE _GLFWtimerWin32 win32
#define _GLFW_PLATFORM_MONITOR_STATE _GLFWmonitorWin32 win32
#define _GLFW_PLATFORM_CURSOR_STATE _GLFWcursorWin32 win32
#define _GLFW_PLATFORM_TLS_STATE _GLFWtlsWin32 win32
#define _GLFW_PLATFORM_MUTEX_STATE _GLFWmutexWin32 win32
// Win32-specific per-window data
//
typedef struct _GLFWwindowWin32
{
HWND handle;
HICON bigIcon;
HICON smallIcon;
GLFWbool cursorTracked;
GLFWbool frameAction;
GLFWbool iconified;
GLFWbool maximized;
// Whether to enable framebuffer transparency on DWM
GLFWbool transparent;
GLFWbool scaleToMonitor;
GLFWbool keymenu;
// The last received cursor position, regardless of source
int lastCursorPosX, lastCursorPosY;
// The last recevied high surrogate when decoding pairs of UTF-16 messages
WCHAR highSurrogate;
} _GLFWwindowWin32;
// Win32-specific global data
//
typedef struct _GLFWlibraryWin32
{
HWND helperWindowHandle;
HDEVNOTIFY deviceNotificationHandle;
DWORD foregroundLockTimeout;
int acquiredMonitorCount;
char* clipboardString;
short int keycodes[512];
short int scancodes[GLFW_KEY_LAST + 1];
char keynames[GLFW_KEY_LAST + 1][5];
// Where to place the cursor when re-enabled
double restoreCursorPosX, restoreCursorPosY;
// The window whose disabled cursor mode is active
_GLFWwindow* disabledCursorWindow;
RAWINPUT* rawInput;
int rawInputSize;
UINT mouseTrailSize;
struct {
HINSTANCE instance;
PFN_timeGetTime GetTime;
} winmm;
struct {
HINSTANCE instance;
PFN_DirectInput8Create Create;
IDirectInput8W* api;
} dinput8;
struct {
HINSTANCE instance;
PFN_XInputGetCapabilities GetCapabilities;
PFN_XInputGetState GetState;
} xinput;
struct {
HINSTANCE instance;
PFN_SetProcessDPIAware SetProcessDPIAware_;
PFN_ChangeWindowMessageFilterEx ChangeWindowMessageFilterEx_;
PFN_EnableNonClientDpiScaling EnableNonClientDpiScaling_;
PFN_SetProcessDpiAwarenessContext SetProcessDpiAwarenessContext_;
PFN_GetDpiForWindow GetDpiForWindow_;
PFN_AdjustWindowRectExForDpi AdjustWindowRectExForDpi_;
} user32;
struct {
HINSTANCE instance;
PFN_DwmIsCompositionEnabled IsCompositionEnabled;
PFN_DwmFlush Flush;
PFN_DwmEnableBlurBehindWindow EnableBlurBehindWindow;
PFN_DwmGetColorizationColor GetColorizationColor;
} dwmapi;
struct {
HINSTANCE instance;
PFN_SetProcessDpiAwareness SetProcessDpiAwareness_;
PFN_GetDpiForMonitor GetDpiForMonitor_;
} shcore;
struct {
HINSTANCE instance;
PFN_RtlVerifyVersionInfo RtlVerifyVersionInfo_;
} ntdll;
} _GLFWlibraryWin32;
// Win32-specific per-monitor data
//
typedef struct _GLFWmonitorWin32
{
HMONITOR handle;
// This size matches the static size of DISPLAY_DEVICE.DeviceName
WCHAR adapterName[32];
WCHAR displayName[32];
char publicAdapterName[32];
char publicDisplayName[32];
GLFWbool modesPruned;
GLFWbool modeChanged;
} _GLFWmonitorWin32;
// Win32-specific per-cursor data
//
typedef struct _GLFWcursorWin32
{
HCURSOR handle;
} _GLFWcursorWin32;
// Win32-specific global timer data
//
typedef struct _GLFWtimerWin32
{
GLFWbool hasPC;
uint64_t frequency;
} _GLFWtimerWin32;
// Win32-specific thread local storage data
//
typedef struct _GLFWtlsWin32
{
GLFWbool allocated;
DWORD index;
} _GLFWtlsWin32;
// Win32-specific mutex data
//
typedef struct _GLFWmutexWin32
{
GLFWbool allocated;
CRITICAL_SECTION section;
} _GLFWmutexWin32;
GLFWbool _glfwRegisterWindowClassWin32(void);
void _glfwUnregisterWindowClassWin32(void);
WCHAR* _glfwCreateWideStringFromUTF8Win32(const char* source);
char* _glfwCreateUTF8FromWideStringWin32(const WCHAR* source);
BOOL _glfwIsWindowsVersionOrGreaterWin32(WORD major, WORD minor, WORD sp);
BOOL _glfwIsWindows10BuildOrGreaterWin32(WORD build);
void _glfwInputErrorWin32(int error, const char* description);
void _glfwUpdateKeyNamesWin32(void);
void _glfwInitTimerWin32(void);
void _glfwPollMonitorsWin32(void);
void _glfwSetVideoModeWin32(_GLFWmonitor* monitor, const GLFWvidmode* desired);
void _glfwRestoreVideoModeWin32(_GLFWmonitor* monitor);
void _glfwGetMonitorContentScaleWin32(HMONITOR handle, float* xscale, float* yscale);
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