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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
Download Patch File Download Diff File Expand all files Collapse all files
src/cocoa_window.m
+10 -8
View File
@@ -413,11 +413,7 @@ static const NSRange kEmptyRange = { NSNotFound, 0 };
- (BOOL)isOpaque
{
// Set to NO even if alphaMask is not used;
// The NSView/GLFWContentView does not need to be opaque anyway,
// and to avoid keeping track of alphaMask inside the NSView we
// just return NO here instead.
return NO;
return [window->ns.object isOpaque];
}
- (BOOL)canBecomeKeyView
@@ -1016,7 +1012,8 @@ static GLFWbool initializeAppKit(void)
// Create the Cocoa window
//
static GLFWbool createNativeWindow(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig)
const _GLFWwndconfig* wndconfig,
const _GLFWfbconfig* fbconfig)
{
window->ns.delegate = [[GLFWWindowDelegate alloc] initWithGlfwWindow:window];
if (window->ns.delegate == nil)
@@ -1085,7 +1082,7 @@ static GLFWbool createNativeWindow(_GLFWwindow* window,
if (wndconfig->ns.retina)
[window->ns.view setWantsBestResolutionOpenGLSurface:YES];
if (_glfw.hints.framebuffer.transparent)
if (fbconfig->transparent)
{
[window->ns.object setOpaque:NO];
[window->ns.object setBackgroundColor:[NSColor clearColor]];
@@ -1114,7 +1111,7 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
if (!initializeAppKit())
return GLFW_FALSE;
if (!createNativeWindow(window, wndconfig))
if (!createNativeWindow(window, wndconfig, fbconfig))
return GLFW_FALSE;
if (ctxconfig->client != GLFW_NO_API)
@@ -1453,6 +1450,11 @@ int _glfwPlatformWindowMaximized(_GLFWwindow* window)
return [window->ns.object isZoomed];
}
int _glfwPlatformFramebufferTransparent(_GLFWwindow* window)
{
return ![window->ns.object isOpaque] && ![window->ns.view isOpaque];
}
void _glfwPlatformSetWindowResizable(_GLFWwindow* window, GLFWbool enabled)
{
[window->ns.object setStyleMask:getStyleMask(window)];
src/context.c
+3
View File
@@ -208,6 +208,9 @@ const _GLFWfbconfig* _glfwChooseFBConfig(const _GLFWfbconfig* desired,
// not important to us here, so we count them as one
missing++;
}
if (desired->transparent != current->transparent)
missing++;
}
// These polynomials make many small channel size differences matter
src/egl_context.c
+18 -40
View File
@@ -87,21 +87,13 @@ static int getEGLConfigAttrib(EGLConfig config, int attrib)
//
static GLFWbool chooseEGLConfig(const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* desired,
EGLConfig* result,
GLFWbool findTransparent)
EGLConfig* result)
{
EGLConfig* nativeConfigs;
_GLFWfbconfig* usableConfigs;
const _GLFWfbconfig* closest;
int i, nativeCount, usableCount;
#if defined(_GLFW_X11)
XVisualInfo visualTemplate = {0};
if ( !(_glfw.xrender.major || _glfw.xrender.minor) ) {
findTransparent = GLFW_FALSE;
}
#endif // _GLFW_X11
eglGetConfigs(_glfw.egl.display, NULL, 0, &nativeCount);
if (!nativeCount)
{
@@ -115,7 +107,6 @@ static GLFWbool chooseEGLConfig(const _GLFWctxconfig* ctxconfig,
usableConfigs = calloc(nativeCount, sizeof(_GLFWfbconfig));
usableCount = 0;
selectionloop:
for (i = 0; i < nativeCount; i++)
{
const EGLConfig n = nativeConfigs[i];
@@ -130,31 +121,24 @@ selectionloop:
continue;
#if defined(_GLFW_X11)
XVisualInfo vi = {0};
// Only consider EGLConfigs with associated Visuals
visualTemplate.visualid = getEGLConfigAttrib(n, EGL_NATIVE_VISUAL_ID);
if (!visualTemplate.visualid)
vi.visualid = getEGLConfigAttrib(n, EGL_NATIVE_VISUAL_ID);
if (!vi.visualid)
continue;
if( findTransparent ) {
int n_vi;
XVisualInfo *visualinfo;
XRenderPictFormat *pictFormat;
visualinfo = XGetVisualInfo(_glfw.x11.display, VisualIDMask, &visualTemplate, &n_vi);
if (!visualinfo)
continue;
pictFormat = XRenderFindVisualFormat(_glfw.x11.display, visualinfo->visual);
if( !pictFormat ) {
XFree( visualinfo );
continue;
}
if( !pictFormat->direct.alphaMask ) {
XFree( visualinfo );
continue;
}
XFree( visualinfo );
if (desired->transparent)
{
int count;
XVisualInfo* vis = XGetVisualInfo(_glfw.x11.display,
VisualIDMask, &vi,
&count);
if (vis)
{
u->transparent = _glfwIsVisualTransparentX11(vis[0].visual);
XFree(vis);
}
}
#endif // _GLFW_X11
@@ -191,12 +175,6 @@ selectionloop:
u->handle = (uintptr_t) n;
usableCount++;
}
// reiterate the selection loop without looking for transparency supporting
// formats if no matchig FB configs for a transparent window were found.
if( findTransparent && !usableCount ) {
findTransparent = GLFW_FALSE;
goto selectionloop;
}
closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
if (closest)
@@ -493,7 +471,7 @@ GLFWbool _glfwCreateContextEGL(_GLFWwindow* window,
if (ctxconfig->share)
share = ctxconfig->share->context.egl.handle;
if (!chooseEGLConfig(ctxconfig, fbconfig, &config, fbconfig->transparent))
if (!chooseEGLConfig(ctxconfig, fbconfig, &config))
{
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
"EGL: Failed to find a suitable EGLConfig");
@@ -738,7 +716,7 @@ GLFWbool _glfwChooseVisualEGL(const _GLFWwndconfig* wndconfig,
EGLint visualID = 0, count = 0;
const long vimask = VisualScreenMask | VisualIDMask;
if (!chooseEGLConfig(ctxconfig, fbconfig, &native, fbconfig->transparent))
if (!chooseEGLConfig(ctxconfig, fbconfig, &native))
{
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
"EGL: Failed to find a suitable EGLConfig");
src/glx_context.c
+12 -36
View File
@@ -47,10 +47,8 @@ static int getGLXFBConfigAttrib(GLXFBConfig fbconfig, int attrib)
// Return the GLXFBConfig most closely matching the specified hints
//
static GLFWbool chooseGLXFBConfig(
const _GLFWfbconfig* desired,
GLXFBConfig* result,
GLFWbool findTransparent)
static GLFWbool chooseGLXFBConfig(const _GLFWfbconfig* desired,
GLXFBConfig* result)
{
GLXFBConfig* nativeConfigs;
_GLFWfbconfig* usableConfigs;
@@ -59,10 +57,6 @@ static GLFWbool chooseGLXFBConfig(
const char* vendor;
GLFWbool trustWindowBit = GLFW_TRUE;
if ( !(_glfw.xrender.major || _glfw.xrender.minor) ) {
findTransparent = GLFW_FALSE;
}
// HACK: This is a (hopefully temporary) workaround for Chromium
// (VirtualBox GL) not setting the window bit on any GLXFBConfigs
vendor = glXGetClientString(_glfw.x11.display, GLX_VENDOR);
@@ -80,7 +74,6 @@ static GLFWbool chooseGLXFBConfig(
usableConfigs = calloc(nativeCount, sizeof(_GLFWfbconfig));
usableCount = 0;
selectionloop:
for (i = 0; i < nativeCount; i++)
{
const GLXFBConfig n = nativeConfigs[i];
@@ -97,25 +90,14 @@ selectionloop:
continue;
}
if( findTransparent ) {
XVisualInfo *visualinfo;
XRenderPictFormat *pictFormat;
visualinfo = glXGetVisualFromFBConfig(_glfw.x11.display, n);
if (!visualinfo)
continue;
pictFormat = XRenderFindVisualFormat(_glfw.x11.display, visualinfo->visual);
if( !pictFormat ) {
XFree( visualinfo );
continue;
}
if( !pictFormat->direct.alphaMask ) {
XFree( visualinfo );
continue;
}
XFree( visualinfo );
if (desired->transparent)
{
XVisualInfo* vi = glXGetVisualFromFBConfig(_glfw.x11.display, n);
if (vi)
{
u->transparent = _glfwIsVisualTransparentX11(vi->visual);
XFree(vi);
}
}
u->redBits = getGLXFBConfigAttrib(n, GLX_RED_SIZE);
@@ -147,12 +129,6 @@ selectionloop:
u->handle = (uintptr_t) n;
usableCount++;
}
// reiterate the selection loop without looking for transparency supporting
// formats if no matchig FB configs for a transparent window were found.
if( findTransparent && !usableCount ) {
findTransparent = GLFW_FALSE;
goto selectionloop;
}
closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
if (closest)
@@ -477,7 +453,7 @@ GLFWbool _glfwCreateContextGLX(_GLFWwindow* window,
if (ctxconfig->share)
share = ctxconfig->share->context.glx.handle;
if (!chooseGLXFBConfig(fbconfig, &native, fbconfig->transparent))
if (!chooseGLXFBConfig(fbconfig, &native))
{
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
"GLX: Failed to find a suitable GLXFBConfig");
@@ -665,7 +641,7 @@ GLFWbool _glfwChooseVisualGLX(const _GLFWwndconfig* wndconfig,
GLXFBConfig native;
XVisualInfo* result;
if (!chooseGLXFBConfig(fbconfig, &native, fbconfig->transparent))
if (!chooseGLXFBConfig(fbconfig, &native))
{
_glfwInputError(GLFW_FORMAT_UNAVAILABLE,
"GLX: Failed to find a suitable GLXFBConfig");
src/internal.h
+1
View File
@@ -682,6 +682,7 @@ int _glfwPlatformWindowFocused(_GLFWwindow* window);
int _glfwPlatformWindowIconified(_GLFWwindow* window);
int _glfwPlatformWindowVisible(_GLFWwindow* window);
int _glfwPlatformWindowMaximized(_GLFWwindow* window);
int _glfwPlatformFramebufferTransparent(_GLFWwindow* window);
void _glfwPlatformSetWindowResizable(_GLFWwindow* window, GLFWbool enabled);
void _glfwPlatformSetWindowDecorated(_GLFWwindow* window, GLFWbool enabled);
void _glfwPlatformSetWindowFloating(_GLFWwindow* window, GLFWbool enabled);
src/mir_window.c
+7
View File
@@ -614,6 +614,13 @@ int _glfwPlatformWindowMaximized(_GLFWwindow* window)
return mir_window_get_state(window->mir.window) == mir_window_state_maximized;
}
int _glfwPlatformFramebufferTransparent(_GLFWwindow* window)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Mir: Unsupported function %s", __PRETTY_FUNCTION__);
return GLFW_FALSE;
}
void _glfwPlatformSetWindowResizable(_GLFWwindow* window, GLFWbool enabled)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
src/null_window.c
+5
View File
@@ -156,6 +156,11 @@ int _glfwPlatformWindowMaximized(_GLFWwindow* window)
return GLFW_FALSE;
}
int _glfwPlatformFramebufferTransparent(_GLFWwindow* window)
{
return GLFW_FALSE;
}
void _glfwPlatformSetWindowResizable(_GLFWwindow* window, GLFWbool enabled)
{
}
src/wgl_context.c
+5 -117
View File
@@ -83,20 +83,6 @@ static int choosePixelFormat(_GLFWwindow* window,
{
const int n = i + 1;
_GLFWfbconfig* u = usableConfigs + usableCount;
PIXELFORMATDESCRIPTOR pfd;
if (fbconfig->transparent) {
if (!DescribePixelFormat(window->context.wgl.dc,
n,
sizeof(PIXELFORMATDESCRIPTOR),
&pfd))
{
continue;
}
if (!(pfd.dwFlags & PFD_SUPPORT_COMPOSITION))
continue;
}
if (_glfw.wgl.ARB_pixel_format)
{
@@ -168,7 +154,9 @@ static int choosePixelFormat(_GLFWwindow* window,
{
// Get pixel format attributes through legacy PFDs
if (!fbconfig->transparent && DescribePixelFormat(window->context.wgl.dc,
PIXELFORMATDESCRIPTOR pfd;
if (!DescribePixelFormat(window->context.wgl.dc,
n,
sizeof(PIXELFORMATDESCRIPTOR),
&pfd))
@@ -215,14 +203,6 @@ static int choosePixelFormat(_GLFWwindow* window,
u->handle = n;
usableCount++;
}
// Reiterate the selection loop without looking for transparency supporting
// formats if no matching pixelformat for a transparent window were found.
if (fbconfig->transparent && !usableCount) {
free(usableConfigs);
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: No pixel format found for transparent window. Ignoring transparency.");
return choosePixelFormat(window, ctxconfig, fbconfig);
}
if (!usableCount)
{
@@ -249,21 +229,6 @@ static int choosePixelFormat(_GLFWwindow* window,
return pixelFormat;
}
// Returns whether desktop compositing is enabled
//
static GLFWbool isCompositionEnabled(void)
{
if (_glfw.win32.dwmapi.instance)
{
BOOL enabled;
if (DwmIsCompositionEnabled(&enabled) == S_OK)
return enabled;
}
return FALSE;
}
static void makeContextCurrentWGL(_GLFWwindow* window)
{
if (window)
@@ -292,7 +257,7 @@ static void makeContextCurrentWGL(_GLFWwindow* window)
static void swapBuffersWGL(_GLFWwindow* window)
{
// HACK: Use DwmFlush when desktop composition is enabled
if (isCompositionEnabled() && !window->monitor)
if (_glfwIsCompositionEnabledWin32() && !window->monitor)
{
int count = abs(window->context.wgl.interval);
while (count--)
@@ -310,7 +275,7 @@ static void swapIntervalWGL(int interval)
// HACK: Disable WGL swap interval when desktop composition is enabled to
// avoid interfering with DWM vsync
if (isCompositionEnabled() && !window->monitor)
if (_glfwIsCompositionEnabledWin32() && !window->monitor)
interval = 0;
if (_glfw.wgl.EXT_swap_control)
@@ -504,75 +469,6 @@ void _glfwTerminateWGL(void)
attribs[index++] = v; \
}
static GLFWbool setupTransparentWindow(_GLFWwindow* window)
{
if (!isCompositionEnabled) {
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Composition needed for transparent window is disabled");
}
if (!_glfw_DwmEnableBlurBehindWindow) {
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Unable to load DwmEnableBlurBehindWindow required for transparent window");
return GLFW_FALSE;
}
HRESULT hr = S_OK;
HWND handle = window->win32.handle;
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(handle, &bb);
if (!SUCCEEDED(hr)) {
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Failed to enable blur behind window required for transparent window");
return GLFW_FALSE;
}
// Decorated windows on Windows 8+ don't repaint the transparent background
// leaving a trail behind animations.
// Hack: making the window layered with a transparency color key seems to fix this.
// Normally, when specifying a transparency color key to be used when composing
// the layered window, all pixels painted by the window in this color will be transparent.
// That doesn't seem to be the case anymore on Windows 8+, at least when used with
// DwmEnableBlurBehindWindow + negative region.
if (window->decorated && IsWindows8OrGreater())
{
long style = GetWindowLong(handle, GWL_EXSTYLE);
if (!style) {
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Failed to retrieve extended styles. GetLastError: %d",
GetLastError());
return GLFW_FALSE;
}
style |= WS_EX_LAYERED;
if (!SetWindowLongPtr(handle, GWL_EXSTYLE, style))
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Failed to add layered style. GetLastError: %d",
GetLastError());
return GLFW_FALSE;
}
if (!SetLayeredWindowAttributes(handle,
// Using a color key not equal to black to fix the trailing issue.
// When set to black, something is making the hit test not resize with the
// window frame.
RGB(0, 193, 48),
255,
LWA_COLORKEY))
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"WGL: Failed to set layered window. GetLastError: %d",
GetLastError());
return GLFW_FALSE;
}
}
return GLFW_TRUE;
}
// Create the OpenGL or OpenGL ES context
//
GLFWbool _glfwCreateContextWGL(_GLFWwindow* window,
@@ -802,14 +698,6 @@ GLFWbool _glfwCreateContextWGL(_GLFWwindow* window,
}
}
if (fbconfig->transparent)
{
if (!setupTransparentWindow(window))
_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
"WGL: Failed to setup window as transparent as requested");
}
window->context.makeCurrent = makeContextCurrentWGL;
window->context.swapBuffers = swapBuffersWGL;
window->context.swapInterval = swapIntervalWGL;
src/win32_init.c
+12 -1
View File
@@ -62,6 +62,17 @@ BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved)
#endif // _GLFW_BUILD_DLL
// HACK: Define versionhelpers.h functions manually as MinGW lacks the header
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);
}
// Load necessary libraries (DLLs)
//
static GLFWbool loadLibraries(void)
@@ -131,7 +142,7 @@ static GLFWbool loadLibraries(void)
GetProcAddress(_glfw.win32.dwmapi.instance, "DwmIsCompositionEnabled");
_glfw.win32.dwmapi.Flush = (PFN_DwmFlush)
GetProcAddress(_glfw.win32.dwmapi.instance, "DwmFlush");
_glfw.win32.dwmapi.DwmEnableBlurBehindWindow = (DWMENABLEBLURBEHINDWINDOW_T)
_glfw.win32.dwmapi.EnableBlurBehindWindow = (PFN_DwmEnableBlurBehindWindow)
GetProcAddress(_glfw.win32.dwmapi.instance, "DwmEnableBlurBehindWindow");
}
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);
src/win32_window.c
+84 -2
View File
@@ -306,6 +306,55 @@ static void updateWindowStyles(const _GLFWwindow* window)
SWP_FRAMECHANGED | SWP_NOACTIVATE | SWP_NOZORDER);
}
// Update window framebuffer transparency
//
static void updateFramebufferTransparency(const _GLFWwindow* window)
{
if (!IsWindowsVistaOrGreater())
return;
if (_glfwIsCompositionEnabledWin32())
{
HRGN region = CreateRectRgn(0, 0, -1, -1);
DWM_BLURBEHIND bb = {0};
bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
bb.hRgnBlur = region;
bb.fEnable = TRUE;
if (SUCCEEDED(DwmEnableBlurBehindWindow(window->win32.handle, &bb)))
{
// Decorated windows don't repaint the transparent background
// leaving a trail behind animations
// HACK: Making the window layered with a transparency color key
// seems to fix this. Normally, when specifying
// a transparency color key to be used when composing the
// layered window, all pixels painted by the window in this
// color will be transparent. That doesn't seem to be the
// case anymore, at least when used with blur behind window
// plus negative region.
LONG style = GetWindowLongW(window->win32.handle, GWL_EXSTYLE);
style |= WS_EX_LAYERED;
SetWindowLongW(window->win32.handle, GWL_EXSTYLE, style);
// Using a color key not equal to black to fix the trailing
// issue. When set to black, something is making the hit test
// not resize with the window frame.
SetLayeredWindowAttributes(window->win32.handle,
RGB(0, 193, 48), 255, LWA_COLORKEY);
}
DeleteObject(region);
}
else
{
LONG style = GetWindowLongW(window->win32.handle, GWL_EXSTYLE);
style &= ~WS_EX_LAYERED;
SetWindowLongW(window->win32.handle, GWL_EXSTYLE, style);
RedrawWindow(window->win32.handle, NULL, NULL,
RDW_ERASE | RDW_INVALIDATE | RDW_FRAME);
}
}
// Translates a GLFW standard cursor to a resource ID
//
static LPWSTR translateCursorShape(int shape)
@@ -916,6 +965,13 @@ static LRESULT CALLBACK windowProc(HWND hWnd, UINT uMsg,
return TRUE;
}
case WM_DWMCOMPOSITIONCHANGED:
{
if (window->win32.transparent)
updateFramebufferTransparency(window);
return 0;
}
case WM_SETCURSOR:
{
if (LOWORD(lParam) == HTCLIENT)
@@ -981,7 +1037,8 @@ static LRESULT CALLBACK windowProc(HWND hWnd, UINT uMsg,
// Creates the GLFW window
//
static int createNativeWindow(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig)
const _GLFWwndconfig* wndconfig,
const _GLFWfbconfig* fbconfig)
{
int xpos, ypos, fullWidth, fullHeight;
WCHAR* wideTitle;
@@ -1051,6 +1108,12 @@ static int createNativeWindow(_GLFWwindow* window,
DragAcceptFiles(window->win32.handle, TRUE);
if (fbconfig->transparent)
{
updateFramebufferTransparency(window);
window->win32.transparent = GLFW_TRUE;
}
return GLFW_TRUE;
}
@@ -1102,6 +1165,20 @@ void _glfwUnregisterWindowClassWin32(void)
UnregisterClassW(_GLFW_WNDCLASSNAME, GetModuleHandleW(NULL));
}
// Returns whether desktop compositing is enabled
//
GLFWbool _glfwIsCompositionEnabledWin32(void)
{
if (IsWindowsVistaOrGreater())
{
BOOL enabled;
if (SUCCEEDED(DwmIsCompositionEnabled(&enabled)))
return enabled;
}
return FALSE;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
@@ -1112,7 +1189,7 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig)
{
if (!createNativeWindow(window, wndconfig))
if (!createNativeWindow(window, wndconfig, fbconfig))
return GLFW_FALSE;
if (ctxconfig->client != GLFW_NO_API)
@@ -1481,6 +1558,11 @@ int _glfwPlatformWindowMaximized(_GLFWwindow* window)
return IsZoomed(window->win32.handle);
}
int _glfwPlatformFramebufferTransparent(_GLFWwindow* window)
{
return window->win32.transparent && _glfwIsCompositionEnabledWin32();
}
void _glfwPlatformSetWindowResizable(_GLFWwindow* window, GLFWbool enabled)
{
updateWindowStyles(window);
src/window.c
+2 -1
View File
@@ -147,7 +147,6 @@ GLFWAPI GLFWwindow* glfwCreateWindow(int width, int height,
fbconfig = _glfw.hints.framebuffer;
ctxconfig = _glfw.hints.context;
wndconfig = _glfw.hints.window;
fbconfig.transparent = _glfw.hints.framebuffer.transparent ? GLFW_TRUE : GLFW_FALSE;
wndconfig.width = width;
wndconfig.height = height;
@@ -728,6 +727,8 @@ GLFWAPI int glfwGetWindowAttrib(GLFWwindow* handle, int attrib)
return _glfwPlatformWindowVisible(window);
case GLFW_MAXIMIZED:
return _glfwPlatformWindowMaximized(window);
case GLFW_TRANSPARENT:
return _glfwPlatformFramebufferTransparent(window);
case GLFW_RESIZABLE:
return window->resizable;
case GLFW_DECORATED:
src/wl_window.c
+7
View File
@@ -654,6 +654,13 @@ int _glfwPlatformWindowMaximized(_GLFWwindow* window)
return window->wl.maximized;
}
int _glfwPlatformFramebufferTransparent(_GLFWwindow* window)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Wayland: Framebuffer transparency attribute not implemented yet");
return GLFW_FALSE;
}
void _glfwPlatformSetWindowResizable(_GLFWwindow* window, GLFWbool enabled)
{
// TODO
src/x11_init.c
+23 -49
View File
@@ -651,6 +651,29 @@ static GLFWbool initExtensions(void)
dlsym(_glfw.x11.x11xcb.handle, "XGetXCBConnection");
}
_glfw.x11.xrender.handle = dlopen("libXrender.so.1", RTLD_LAZY | RTLD_GLOBAL);
if (_glfw.x11.xrender.handle)
{
_glfw.x11.xrender.QueryExtension = (PFN_XRenderQueryExtension)
dlsym(_glfw.x11.xrender.handle, "XRenderQueryExtension");
_glfw.x11.xrender.QueryVersion = (PFN_XRenderQueryVersion)
dlsym(_glfw.x11.xrender.handle, "XRenderQueryVersion");
_glfw.x11.xrender.FindVisualFormat = (PFN_XRenderFindVisualFormat)
dlsym(_glfw.x11.xrender.handle, "XRenderFindVisualFormat");
if (XRenderQueryExtension(_glfw.x11.display,
&_glfw.x11.xrender.errorBase,
&_glfw.x11.xrender.eventBase))
{
if (XRenderQueryVersion(_glfw.x11.display,
&_glfw.x11.xrender.major,
&_glfw.x11.xrender.minor))
{
_glfw.x11.xrender.available = GLFW_TRUE;
}
}
}
// Update the key code LUT
// FIXME: We should listen to XkbMapNotify events to track changes to
// the keyboard mapping.
@@ -717,55 +740,6 @@ static GLFWbool initExtensions(void)
_glfw.x11.MOTIF_WM_HINTS =
XInternAtom(_glfw.x11.display, "_MOTIF_WM_HINTS", False);
int i;
const char* sonames_xrender[] =
{
#if defined(__CYGWIN__)
"libXrender-1.so",
#else
"libXrender.so.1",
"libXrender.so",
#endif
NULL
};
// Xrender support is optional and not a requirement for GLX/EGL
// to work. Xrender is required for selecting a FB config that
// supports a picture format with an alpha mask, which in turn
// is required for transparent windows. I Xrender is not supported
// the GLFW_TRANSPARENT window hint is ignored.
for (i = 0; sonames_xrender[i]; i++)
{
_glfw.xrender.handle = dlopen(sonames_xrender[i], RTLD_LAZY | RTLD_GLOBAL);
if (_glfw.xrender.handle)
break;
}
_glfw.xrender.errorBase = 0;
_glfw.xrender.eventBase = 0;
_glfw.xrender.major = 0;
_glfw.xrender.minor = 0;
if (_glfw.xrender.handle) do {
int errorBase, eventBase, major, minor;
_glfw.xrender.QueryExtension =
dlsym(_glfw.xrender.handle, "XRenderQueryExtension");
_glfw.xrender.QueryVersion =
dlsym(_glfw.xrender.handle, "XRenderQueryVersion");
_glfw.xrender.FindVisualFormat =
dlsym(_glfw.xrender.handle, "XRenderFindVisualFormat");
if ( !XRenderQueryExtension(_glfw.x11.display, &errorBase, &eventBase)) {
break;
}
if ( !XRenderQueryVersion(_glfw.x11.display, &major, &minor)) {
break;
}
_glfw.xrender.errorBase = errorBase;
_glfw.xrender.eventBase = eventBase;
_glfw.xrender.major = major;
_glfw.xrender.minor = minor;
} while(0);
return GLFW_TRUE;
}
src/x11_platform.h
+24 -27
View File
@@ -116,6 +116,13 @@ typedef int (* PFN_XISelectEvents)(Display*,Window,XIEventMask*,int);
#define XIQueryVersion _glfw.x11.xi.QueryVersion
#define XISelectEvents _glfw.x11.xi.SelectEvents
typedef Bool (* PFN_XRenderQueryExtension)(Display*,int*,int*);
typedef Status (* PFN_XRenderQueryVersion)(Display*dpy,int*,int*);
typedef XRenderPictFormat* (* PFN_XRenderFindVisualFormat)(Display*,Visual const*);
#define XRenderQueryExtension _glfw.x11.xrender.QueryExtension
#define XRenderQueryVersion _glfw.x11.xrender.QueryVersion
#define XRenderFindVisualFormat _glfw.x11.xrender.FindVisualFormat
typedef VkFlags VkXlibSurfaceCreateFlagsKHR;
typedef VkFlags VkXcbSurfaceCreateFlagsKHR;
@@ -162,20 +169,10 @@ typedef VkBool32 (APIENTRY *PFN_vkGetPhysicalDeviceXcbPresentationSupportKHR)(Vk
#define _GLFW_EGL_NATIVE_DISPLAY ((EGLNativeDisplayType) _glfw.x11.display)
#define _GLFW_PLATFORM_WINDOW_STATE _GLFWwindowX11 x11
#define _GLFW_PLATFORM_LIBRARY_WINDOW_STATE _GLFWlibraryX11 x11 ; _GLFWlibraryXrender xrender
#define _GLFW_PLATFORM_LIBRARY_WINDOW_STATE _GLFWlibraryX11 x11
#define _GLFW_PLATFORM_MONITOR_STATE _GLFWmonitorX11 x11
#define _GLFW_PLATFORM_CURSOR_STATE _GLFWcursorX11 x11
// libXrender.so function pointer typedefs
typedef Bool (*PFNXRENDERQUERYEXTENSIONPROC)(Display*,int*,int*);
typedef Status (*PFNXRENDERQUERYVERSIONPROC)(Display*dpy,int*,int*);
typedef XRenderPictFormat* (*PFNXRENDERFINDVISUALFORMATPROC)(Display*,Visual const *);
// libXrender.so function identifier overlays
#define XRenderQueryExtension _glfw.xrender.QueryExtension
#define XRenderQueryVersion _glfw.xrender.QueryVersion
#define XRenderFindVisualFormat _glfw.xrender.FindVisualFormat
// X11-specific per-window data
//
@@ -189,6 +186,9 @@ typedef struct _GLFWwindowX11
GLFWbool iconified;
GLFWbool maximized;
// Whether the visual supports framebuffer transparency
GLFWbool transparent;
// Cached position and size used to filter out duplicate events
int width, height;
int xpos, ypos;
@@ -383,24 +383,20 @@ typedef struct _GLFWlibraryX11
PFN_XISelectEvents SelectEvents;
} xi;
struct {
GLFWbool available;
void* handle;
int major;
int minor;
int eventBase;
int errorBase;
PFN_XRenderQueryExtension QueryExtension;
PFN_XRenderQueryVersion QueryVersion;
PFN_XRenderFindVisualFormat FindVisualFormat;
} xrender;
} _GLFWlibraryX11;
// Xrender-specific global data
typedef struct _GLFWlibraryXrender
{
int major, minor;
int eventBase;
int errorBase;
// dlopen handle for libGL.so.1
void* handle;
// Xrender functions (subset required for transparent window)
PFNXRENDERQUERYEXTENSIONPROC QueryExtension;
PFNXRENDERQUERYVERSIONPROC QueryVersion;
PFNXRENDERFINDVISUALFORMATPROC FindVisualFormat;
} _GLFWlibraryXrender;
// X11-specific per-monitor data
//
typedef struct _GLFWmonitorX11
@@ -434,6 +430,7 @@ unsigned long _glfwGetWindowPropertyX11(Window window,
Atom property,
Atom type,
unsigned char** value);
GLFWbool _glfwIsVisualTransparentX11(Visual* visual);
void _glfwGrabErrorHandlerX11(void);
void _glfwReleaseErrorHandlerX11(void);
src/x11_window.c
+25
View File
@@ -364,6 +364,7 @@ static void updateWindowMode(_GLFWwindow* window)
}
// Enable compositor bypass
if (!window->x11.transparent)
{
const unsigned long value = 1;
@@ -402,6 +403,7 @@ static void updateWindowMode(_GLFWwindow* window)
}
// Disable compositor bypass
if (!window->x11.transparent)
{
XDeleteProperty(_glfw.x11.display, window->x11.handle,
_glfw.x11.NET_WM_BYPASS_COMPOSITOR);
@@ -577,6 +579,8 @@ static GLFWbool createNativeWindow(_GLFWwindow* window,
visual,
AllocNone);
window->x11.transparent = _glfwIsVisualTransparentX11(visual);
// Create the actual window
{
XSetWindowAttributes wa;
@@ -1838,6 +1842,15 @@ unsigned long _glfwGetWindowPropertyX11(Window window,
return itemCount;
}
GLFWbool _glfwIsVisualTransparentX11(Visual* visual)
{
if (!_glfw.x11.xrender.available)
return GLFW_FALSE;
XRenderPictFormat* pf = XRenderFindVisualFormat(_glfw.x11.display, visual);
return pf && pf->direct.alphaMask;
}
// Push contents of our selection to clipboard manager
//
void _glfwPushSelectionToManagerX11(void)
@@ -2422,6 +2435,18 @@ int _glfwPlatformWindowMaximized(_GLFWwindow* window)
return maximized;
}
int _glfwPlatformFramebufferTransparent(_GLFWwindow* window)
{
if (!window->x11.transparent)
return GLFW_FALSE;
// Check whether a compositing manager is running
char name[32];
snprintf(name, sizeof(name), "_NET_WM_CM_S%u", _glfw.x11.screen);
const Atom selection = XInternAtom(_glfw.x11.display, name, False);
return XGetSelectionOwner(_glfw.x11.display, selection) != None;
}
void _glfwPlatformSetWindowResizable(_GLFWwindow* window, GLFWbool enabled)
{
int width, height;