implement multithreaded rendering with context switch, gl state save/restore, add progress bar ui node, implement stencil texture for brush, implement multithreaded canvas load/save/export pano. Missing multithread in windows.

PanoPainter-OSX/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -43,13 +43,13 @@
     {
       "size" : "512x512",
       "idiom" : "mac",
-      "filename" : "icon512.png",
+      "filename" : "iTunesArtwork.png",
       "scale" : "1x"
     },
     {
       "size" : "512x512",
       "idiom" : "mac",
-      "filename" : "icon1024.png",
+      "filename" : "iTunesArtwork@2x.png",
       "scale" : "2x"
     }
   ],

PanoPainter-OSX/main.cpp

@@ -6,20 +6,26 @@
 #include "image.h"
 #include "app.h"
 #include "keymap.h"
+#include "main.h"
 #include <CoreFoundation/CoreFoundation.h>
 #include <Cocoa/Cocoa.h>
 #include <CoreVideo/CoreVideo.h>
 #include <OpenGL/OpenGL.h>
 
-@interface View : NSOpenGLView
+@implementation View
+- (void)async_lock
 {
-    CVDisplayLinkRef dl;
-    NSOpenGLContext* glctx;
-    _CGLContextObject* cgl;
-    bool gl_ready;
+    CGLLockContext([glctx CGLContextObj]);
+    [glctx makeCurrentContext];
+}
+- (void)async_unlock
+{
+    CGLUnlockContext([glctx CGLContextObj]);
+}
+- (void)async_swap
+{
+    CGLFlushDrawable([glctx CGLContextObj]);
 }
-- (void)terminateGL;
-@end @implementation View
 - (instancetype)initWithFrame:(NSRect)frameRect
 {
     gl_ready = false;
@@ -98,22 +104,25 @@ static CVReturn MyDisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTime
     double now = hostTime / _timeFreq;
     
     // this will not update unless 1/30th of a second has passed since the last update
-    if ( now < _prevTime + (1.0 / 30.0) && App::I.redraw )
+    if (1 /*now < _prevTime + (1.0 / 30.0) &&*/  )
     {
         // We draw on a secondary thread through the display link
         // When resizing the view, -reshape is called automatically on the main
         // thread. Add a mutex around to avoid the threads accessing the context
         // simultaneously when resizing
-        [glctx makeCurrentContext];
         CGLLockContext([glctx CGLContextObj]);
-        
-        App::I.clear();
-        App::I.update(now - _prevTime);
+        [glctx makeCurrentContext];
+
+        if (App::I.redraw)
+        {
+            App::I.clear();
+            App::I.update(now - _prevTime);
+            CGLFlushDrawable([glctx CGLContextObj]);
+        }
         
         //[[self openGLContext] flushBuffer];
         // returning NO will cause the layer to NOT be redrawn
         
-        CGLFlushDrawable([glctx CGLContextObj]);
         CGLUnlockContext([glctx CGLContextObj]);
         return NO;
     }
@@ -142,9 +151,11 @@ static CVReturn MyDisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTime
     // When resizing the view, -reshape is called automatically on the main
     // thread. Add a mutex around to avoid the threads accessing the context
     // simultaneously when resizing
-    [glctx makeCurrentContext];
     CGLLockContext(cgl);
+    [glctx makeCurrentContext];
 
+    App::I.redraw = true;
+    App::I.clear();
     App::I.update(0);
     
     //[[self openGLContext] flushBuffer];
@@ -325,6 +336,7 @@ static CVReturn MyDisplayLinkCallback(CVDisplayLinkRef displayLink, const CVTime
     
     view = [[View alloc] initWithFrame:r];
     controller = [[Controller alloc] initWithWindow:window];
+    App::I.osx_view = view;
 
     auto style = NSTitledWindowMask|NSMiniaturizableWindowMask|NSResizableWindowMask|NSClosableWindowMask;
     window = [[Window alloc] initWithContentRect:r styleMask:style backing:NSBackingStoreBuffered defer:NO];

PanoPainter-OSX/main.h

@@ -0,0 +1,17 @@
+#include <CoreFoundation/CoreFoundation.h>
+#include <Cocoa/Cocoa.h>
+#include <CoreVideo/CoreVideo.h>
+#include <OpenGL/OpenGL.h>
+
+@interface View : NSOpenGLView
+{
+    CVDisplayLinkRef dl;
+    NSOpenGLContext* glctx;
+    _CGLContextObject* cgl;
+    bool gl_ready;
+}
+- (void)terminateGL;
+- (void)async_lock;
+- (void)async_unlock;
+- (void)async_swap;
+@end