testing iOS multithread rendering

PanoPainter/Base.lproj/Main.storyboard

@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13156.6" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="BV1-FR-VrT">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14460.31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="BV1-FR-VrT">
     <device id="retina4_7" orientation="portrait">
         <adaptation id="fullscreen"/>
     </device>
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13137.5"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14460.20"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
@@ -17,7 +17,7 @@
                         <viewControllerLayoutGuide type="top" id="8aa-yV-Osq"/>
                         <viewControllerLayoutGuide type="bottom" id="qHh-Mt-9TT"/>
                     </layoutGuides>
-                    <view key="view" contentMode="scaleToFill" id="3se-qz-xqx" customClass="GLKView">
+                    <view key="view" contentMode="scaleToFill" id="3se-qz-xqx" customClass="GameView">
                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <color key="backgroundColor" red="0.0" green="0.0" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>

PanoPainter/GameViewController.h

@@ -10,14 +10,17 @@
 #import <GLKit/GLKit.h>
 #import "AppDelegate.h"
 
-@interface GameViewController : GLKViewController<
+@interface GameView : GLKView
+@end
+
+@interface GameViewController : UIViewController<
     UIKeyInput,
     UIImagePickerControllerDelegate,
     UINavigationControllerDelegate,
     UIDocumentInteractionControllerDelegate
     >
 {
-@public GLKView* glview;
+@public GameView* glview;
 }
 - (void)display_file:(std::string)filename;
 - (void)reset_touch;

PanoPainter/GameViewController.m

@@ -55,7 +55,7 @@ std::recursive_mutex lock_mutex;
 //    lock_thread = [NSThread currentThread];
 //    lock_count++;
     [EAGLContext setCurrentContext:self.context];
-    GLKView* view = (GLKView*)self.view;
+    GameView* view = (GameView*)self.view;
     [view bindDrawable];
 }
 - (void)async_unlock
@@ -194,7 +194,7 @@ std::recursive_mutex lock_mutex;
     NSDictionary* info = [aNotification userInfo];
     CGSize kbSize = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size;
     
-    GLKView *view = (GLKView *)self.view;
+    GameView *view = (GameView *)self.view;
     CGRect frame = view.frame;
     frame.size.height -= kbSize.height;
     view.frame = frame;
@@ -380,7 +380,7 @@ std::set<UITouch*> ignored_touch;
     App::I.initLog();
     App::I.ios_view = self;
     
-    self.preferredFramesPerSecond = 60;
+    //self.preferredFramesPerSecond = 60;
     self.context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES3];
     
     if (!self.context) {
@@ -389,9 +389,10 @@ std::set<UITouch*> ignored_touch;
     
     gl_lock = [[NSLock alloc] init];
     
-    GLKView *view = (GLKView *)self.view;
+    GameView *view = (GameView *)self.view;
     view.context = self.context;
     view.drawableDepthFormat = GLKViewDrawableDepthFormat24;
+    view.enableSetNeedsDisplay = NO;
     glview = view;
 
     App::I.width = view.frame.size.width * view.contentScaleFactor;
@@ -433,25 +434,27 @@ std::set<UITouch*> ignored_touch;
 
 - (void)setupGL
 {
-    [EAGLContext setCurrentContext:self.context];
+    [self async_lock];
     App::I.init();
-}
+    [self async_unlock];
     
-- (void)tearDownGL
+    std::thread([self]{
-{
+        while (true)
-    [EAGLContext setCurrentContext:self.context];
-}
-
-#pragma mark - GLKView and GLKViewController delegate methods
-
-- (void)glkView:(GLKView *)view drawInRect:(CGRect)rect
         {
             static auto time = std::chrono::steady_clock::now();
             static double elapsed = 0;
+            static double min_fps_timer = 0;
             auto now = std::chrono::steady_clock::now();
             auto dt = std::chrono::duration<float>(now - time);
             time = now;
             elapsed += dt.count();
+            min_fps_timer += dt.count();
+            
+            if (min_fps_timer > 0.1)
+            {
+                App::I.redraw = true;
+                min_fps_timer = 0;
+            }
             
             std::deque<std::packaged_task<void()>> working_list;
             if (!tasklist.empty())
@@ -465,9 +468,10 @@ std::set<UITouch*> ignored_touch;
             [self async_lock];
             if (!(App::I.redraw || App::I.animate || !working_list.empty()))
             {
-        [self.context presentRenderbuffer:GL_FRAMEBUFFER];
+                //[self.context presentRenderbuffer:GL_FRAMEBUFFER];
                 [self async_unlock];
-        return;
+                std::this_thread::sleep_for(std::chrono::milliseconds(100));
+                continue;
             }
 
             while (!working_list.empty())
@@ -479,7 +483,19 @@ std::set<UITouch*> ignored_touch;
             App::I.update(elapsed);
             [self.context presentRenderbuffer:GL_FRAMEBUFFER];
             [self async_unlock];
+            [self->glview display];
             elapsed = 0;
         }
+    }).detach();
+}
+
+- (void)tearDownGL
+{
+    [EAGLContext setCurrentContext:self.context];
+}
+
+@end
+
+@implementation GameView
 
 @end

src/node_stroke_preview.cpp

@@ -477,10 +477,6 @@ void NodeStrokePreview::draw_stroke()
 {
     if (m_size.x == 0 || m_size.y == 0)
         return;
-#if __IOS__
-    draw_stroke_immediate();
-    return;
-#endif
     s_queue.mutex.lock();
     if (!s_running)
     {