Ken Thomases : winemac: Track whether a view has ever had an OpenGL context attached.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: b6a4b2f593503a105dde01e7bd11ffdde243117a
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=b6a4b2f593503a105dde01e7bd11ffdde243117a

Author: Ken Thomases <ken at codeweavers.com>
Date:   Mon May  8 15:31:48 2017 -0500

winemac: Track whether a view has ever had an OpenGL context attached.

... rather than whether it currently has one.

This is for OpenGLSurfaceMode=behind.  In that mode, we need to make the window
transparent wherever a GL-rendered view should not be clipped by GDI-rendered
children or sibling views.

Some apps attach a GL context to the view only temporarily, do some rendering,
and then detach it.  But the GL surface remains, with the rendered graphics.
In order for those to show, the window needs to remain transparent even though
none of its views has a GL context currently attached.

Signed-off-by: Ken Thomases <ken at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/winemac.drv/cocoa_window.m | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/dlls/winemac.drv/cocoa_window.m b/dlls/winemac.drv/cocoa_window.m
index 7cb3459..a9290c3 100644
--- a/dlls/winemac.drv/cocoa_window.m
+++ b/dlls/winemac.drv/cocoa_window.m
@@ -296,6 +296,7 @@ static CVReturn WineDisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTi
 {
     NSMutableArray* glContexts;
     NSMutableArray* pendingGlContexts;
+    BOOL _everHadGLContext;
     BOOL _cachedHasGLDescendant;
     BOOL _cachedHasGLDescendantValid;
     BOOL clearedGlSurface;
@@ -306,6 +307,8 @@ static CVReturn WineDisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTi
     int backingSize[2];
 }
 
+ at property (readonly, nonatomic) BOOL everHadGLContext;
+
     - (void) addGLContext:(WineOpenGLContext*)context;
     - (void) removeGLContext:(WineOpenGLContext*)context;
     - (void) updateGLContexts;
@@ -358,6 +361,8 @@ static CVReturn WineDisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTi
 
 @implementation WineContentView
 
+ at synthesize everHadGLContext = _everHadGLContext;
+
     - (void) dealloc
     {
         [markedText release];
@@ -467,7 +472,7 @@ static CVReturn WineDisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTi
 
     - (void) addGLContext:(WineOpenGLContext*)context
     {
-        BOOL hadContext = [self hasGLContext];
+        BOOL hadContext = _everHadGLContext;
         if (!glContexts)
             glContexts = [[NSMutableArray alloc] init];
         if (!pendingGlContexts)
@@ -489,6 +494,7 @@ static CVReturn WineDisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTi
             [self setNeedsDisplay:YES];
         }
 
+        _everHadGLContext = YES;
         if (!hadContext)
             [self invalidateHasGLDescendant];
         [(WineWindow*)[self window] updateForGLSubviews];
@@ -496,11 +502,8 @@ static CVReturn WineDisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTi
 
     - (void) removeGLContext:(WineOpenGLContext*)context
     {
-        BOOL hadContext = [self hasGLContext];
         [glContexts removeObjectIdenticalTo:context];
         [pendingGlContexts removeObjectIdenticalTo:context];
-        if (hadContext && ![self hasGLContext])
-            [self invalidateHasGLDescendant];
         [(WineWindow*)[self window] updateForGLSubviews];
     }
 
@@ -519,16 +522,11 @@ static CVReturn WineDisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTi
         [self updateGLContexts:NO];
     }
 
-    - (BOOL) hasGLContext
-    {
-        return [glContexts count] || [pendingGlContexts count];
-    }
-
     - (BOOL) _hasGLDescendant
     {
         if ([self isHidden])
             return NO;
-        if ([self hasGLContext])
+        if (_everHadGLContext)
             return YES;
         for (WineContentView* view in [self subviews])
         {
@@ -2485,7 +2483,7 @@ static CVReturn WineDisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTi
         NSRect contentRect = [[self contentView] frame];
         BOOL coveredByGLView = FALSE;
         WineContentView* view = (WineContentView*)[[self contentView] hitTest:NSMakePoint(NSMidX(contentRect), NSMidY(contentRect))];
-        if ([view isKindOfClass:[WineContentView class]] && [view hasGLContext])
+        if ([view isKindOfClass:[WineContentView class]] && view.everHadGLContext)
         {
             NSRect frame = [view convertRect:[view bounds] toView:nil];
             if (NSContainsRect(frame, contentRect))