Refactoring

example/main.go

@@ -9,9 +9,11 @@ import (
 	"github.com/hajimehoshi/go-ebiten/example/game/rotating"
 	"github.com/hajimehoshi/go-ebiten/example/game/sprites"
 	"github.com/hajimehoshi/go-ebiten/example/game/testpattern"
+	"github.com/hajimehoshi/go-ebiten/graphics"
 	"github.com/hajimehoshi/go-ebiten/ui/cocoa"
 	"os"
 	"runtime"
+	"sync"
 	"time"
 )
 
@@ -53,13 +55,23 @@ func main() {
 
 	frameTime := time.Duration(int64(time.Second) / int64(ebiten.FPS))
 	tick := time.Tick(frameTime)
+	lock := sync.Mutex{}
+	go func() {
+		for {
+			<-tick
+			ui.Update(func(c ebiten.GameContext) {
+				lock.Lock()
+				defer lock.Unlock()
+				game.Update(c)
+			})
+		}
+	}()
 	for {
 		ui.PollEvents()
-		select {
-		case <-tick:
-			ui.Update(game.Update)
-		default:
-		}
-		ui.Draw(game.Draw)
+		ui.Draw(func(c graphics.Context) {
+			lock.Lock()
+			defer lock.Unlock()
+			game.Draw(c)
+		})
 	}
 }

ui/cocoa/cocoa.go

@@ -44,13 +44,13 @@ func (context *GameContext) InputState() ebiten.InputState {
 }
 
 type UI struct {
-	screenWidth    int
-	screenHeight   int
-	screenScale    int
-	title          string
-	graphicsDevice *opengl.Device
-	lock           sync.Mutex
-	gameContext    *GameContext
+	screenWidth     int
+	screenHeight    int
+	screenScale     int
+	title           string
+	graphicsDevice  *opengl.Device
+	gameContext     *GameContext
+	gameContextLock sync.Mutex
 }
 
 var currentUI *UI
@@ -69,6 +69,7 @@ func New(screenWidth, screenHeight, screenScale int, title string) *UI {
 			screenHeight: screenHeight,
 			inputState:   ebiten.InputState{-1, -1},
 		},
+		gameContextLock: sync.Mutex{},
 	}
 	currentUI = ui
 	return ui
@@ -82,7 +83,10 @@ func (ui *UI) Start() {
 		C.size_t(ui.screenHeight),
 		C.size_t(ui.screenScale),
 		cTitle)
-	C.PollEvents()
+	ui.graphicsDevice = opengl.NewDevice(
+		ui.screenWidth,
+		ui.screenHeight,
+		ui.screenScale)
 }
 
 func (ui *UI) PollEvents() {
@@ -96,6 +100,8 @@ func (ui *UI) InitTextures(f func(graphics.TextureFactory)) {
 }
 
 func (ui *UI) Update(f func(ebiten.GameContext)) {
+	ui.gameContextLock.Lock()
+	defer ui.gameContextLock.Unlock()
 	f(ui.gameContext)
 }
 
@@ -105,36 +111,30 @@ func (ui *UI) Draw(f func(graphics.Context)) {
 	C.EndDrawing()
 }
 
-//export ebiten_Initialized
-func ebiten_Initialized() {
-	if currentUI.graphicsDevice != nil {
-		panic("The graphics device is already initialized")
-	}
-	currentUI.graphicsDevice = opengl.NewDevice(
-		currentUI.screenWidth,
-		currentUI.screenHeight,
-		currentUI.screenScale)
-}
-
 //export ebiten_InputUpdated
 func ebiten_InputUpdated(inputType C.InputType, cx, cy C.int) {
+	ui := currentUI
+
+	ui.gameContextLock.Lock()
+	defer ui.gameContextLock.Unlock()
+
 	if inputType == C.InputTypeMouseUp {
-		currentUI.gameContext.inputState = ebiten.InputState{-1, -1}
+		ui.gameContext.inputState = ebiten.InputState{-1, -1}
 		return
 	}
 
 	x, y := int(cx), int(cy)
-	x /= currentUI.screenScale
-	y /= currentUI.screenScale
+	x /= ui.screenScale
+	y /= ui.screenScale
 	if x < 0 {
 		x = 0
-	} else if currentUI.screenWidth <= x {
-		x = currentUI.screenWidth - 1
+	} else if ui.screenWidth <= x {
+		x = ui.screenWidth - 1
 	}
 	if y < 0 {
 		y = 0
-	} else if currentUI.screenHeight <= y {
-		y = currentUI.screenHeight - 1
+	} else if ui.screenHeight <= y {
+		y = ui.screenHeight - 1
 	}
-	currentUI.gameContext.inputState = ebiten.InputState{x, y}
+	ui.gameContext.inputState = ebiten.InputState{x, y}
 }

ui/cocoa/ebiten_window.c

@@ -6,10 +6,7 @@
 
 #import "ebiten_content_view.h"
 
-void ebiten_Initialized(void);
-
-@implementation EbitenWindow
-{
+@implementation EbitenWindow {
   NSOpenGLContext* glContext_;
 }
 
@@ -44,10 +41,7 @@ void ebiten_Initialized(void);
   return self;
 }
 
-- (NSOpenGLContext*)glContext {
-  if (self->glContext_ != nil)
-    return self->glContext_;
-
+- (void)initializeGLContext {
   NSOpenGLPixelFormatAttribute attributes[] = {
     NSOpenGLPFAWindow,
     NSOpenGLPFADoubleBuffer,
@@ -61,11 +55,8 @@ void ebiten_Initialized(void);
                                                 shareContext:nil];
   [self->glContext_ setView:[self contentView]];
   [self->glContext_ makeCurrentContext];
-  ebiten_Initialized();
 
   [format release];
-
-  return self->glContext_;
 }
 
 - (BOOL)windowShouldClose:(id)sender {
@@ -97,12 +88,12 @@ void ebiten_Initialized(void);
 }
 
 - (void)beginDrawing {
-  [[self glContext] makeCurrentContext];
+  [self->glContext_ makeCurrentContext];
   glClear(GL_COLOR_BUFFER_BIT);
 }
 
 - (void)endDrawing {
-  [[self glContext] flushBuffer];
+  [self->glContext_ flushBuffer];
 }
 
 @end

ui/cocoa/ebiten_window.h

@@ -8,10 +8,7 @@
 @interface EbitenWindow : NSWindow<NSWindowDelegate>
 
 - (id)initWithSize:(NSSize)size;
-- (void)alertDidEnd:(NSAlert*)alert
-         returnCode:(NSInteger)returnCode
-        contextInfo:(void*)contextInfo;
-- (BOOL)windowShouldClose:(id)sender;
+- (void)initializeGLContext;
 - (void)beginDrawing;
 - (void)endDrawing;
 

ui/cocoa/mainloop.c

@@ -7,22 +7,6 @@
 
 static EbitenWindow* currentWindow = 0;
 
-void Start(size_t width, size_t height, size_t scale, const char* title) {
-  NSSize size = NSMakeSize(width * scale, height * scale);
-  EbitenWindow* window = [[EbitenWindow alloc]
-                            initWithSize:size];
-  [window setTitle: [[NSString alloc] initWithUTF8String:title]];  
-  EbitenController* controller = [[EbitenController alloc]
-                                    initWithWindow:window];
-  NSApplication* app = [NSApplication sharedApplication];
-  [app setActivationPolicy:NSApplicationActivationPolicyRegular];
-  [app setDelegate:controller];
-  [app finishLaunching];
-  [app activateIgnoringOtherApps:YES];
-
-  currentWindow = window;
-}
-
 void PollEvents(void) {
   for (;;) {
     NSEvent* event = [NSApp nextEventMatchingMask:NSAnyEventMask
@@ -36,6 +20,26 @@ void PollEvents(void) {
   }
 }
 
+void Start(size_t width, size_t height, size_t scale, const char* title) {
+  NSSize size = NSMakeSize(width * scale, height * scale);
+  EbitenWindow* window = [[EbitenWindow alloc]
+                            initWithSize:size];
+  [window setTitle: [[NSString alloc] initWithUTF8String:title]];
+  EbitenController* controller = [[EbitenController alloc]
+                                    initWithWindow:window];
+  NSApplication* app = [NSApplication sharedApplication];
+  [app setActivationPolicy:NSApplicationActivationPolicyRegular];
+  [app setDelegate:controller];
+  [app finishLaunching];
+  [app activateIgnoringOtherApps:YES];
+
+  currentWindow = window;
+
+  PollEvents();
+
+  [window initializeGLContext];
+}
+
 void BeginDrawing(void) {
   [currentWindow beginDrawing];
 }