@ -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 ;
Camilla Löwy
ago%!(EXTRA string=8 years)