Remove OpenGL specific code from GBView

Cocoa/Document.xib

@@ -54,10 +54,10 @@
                         <rect key="frame" x="0.0" y="0.0" width="160" height="144"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <subviews>
-                            <openGLView colorSize="5bit_RGB_8bit_Alpha" useAuxiliaryDepthBufferStencil="NO" allowOffline="YES" wantsBestResolutionOpenGLSurface="YES" id="uqf-pe-VAF" customClass="GBView">
+                            <view id="uqf-pe-VAF" customClass="GBView">
                                 <rect key="frame" x="0.0" y="0.0" width="160" height="144"/>
                                 <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                            </openGLView>
+                            </view>
                         </subviews>
                     </customView>
                 </subviews>

Cocoa/GBGLShader.h

@@ -1,6 +1,6 @@
 #import <Foundation/Foundation.h>
 
-@interface GBShader : NSObject
+@interface GBGLShader : NSObject
 - (instancetype)initWithName:(NSString *) shaderName;
 - (void) renderBitmap: (void *)bitmap previous:(void*) previous inSize:(NSSize)size scale: (double) scale;
 @end

Cocoa/GBGLShader.m

@@ -1,4 +1,4 @@
-#import "GBShader.h"
+#import "GBGLShader.h"
 #import <OpenGL/gl3.h>
 
 /*
@@ -16,7 +16,7 @@ void main(void) {\n\
 }\n\
 ";
 
-@implementation GBShader
+@implementation GBGLShader
 {
     GLuint resolution_uniform;
     GLuint texture_uniform;

Cocoa/GBOpenGLView.h

@@ -0,0 +1,6 @@
+#import <Cocoa/Cocoa.h>
+#import "GBGLShader.h"
+
+@interface GBOpenGLView : NSOpenGLView
+@property GBGLShader *shader;
+@end

Cocoa/GBOpenGLView.m

@@ -0,0 +1,42 @@
+#import "GBOpenGLView.h"
+#import "GBView.h"
+#include <OpenGL/gl.h>
+
+@implementation GBOpenGLView
+
+- (void)drawRect:(NSRect)dirtyRect {
+    if (!self.shader) {
+        self.shader = [[GBGLShader alloc] initWithName:[[NSUserDefaults standardUserDefaults] objectForKey:@"GBFilter"]];
+    }
+    
+    GBView *gbview = (GBView *)self.superview;
+    double scale = self.window.backingScaleFactor;
+    glViewport(0, 0, self.bounds.size.width * scale, self.bounds.size.height * scale);
+    
+    if (gbview.shouldBlendFrameWithPrevious) {
+        [self.shader renderBitmap:gbview.currentBuffer
+                         previous:gbview.previousBuffer
+                           inSize:self.bounds.size
+                            scale:scale];
+    }
+    else {
+        [self.shader renderBitmap:gbview.currentBuffer
+                         previous:NULL
+                           inSize:self.bounds.size
+                            scale:scale];
+    }
+    glFlush();
+}
+
+- (instancetype)initWithFrame:(NSRect)frameRect pixelFormat:(NSOpenGLPixelFormat *)format
+{
+    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(filterChanged) name:@"GBFilterChanged" object:nil];
+    return [super initWithFrame:frameRect pixelFormat:format];
+}
+
+- (void) filterChanged
+{
+    self.shader = nil;
+    [self setNeedsDisplay:YES];
+}
+@end

Cocoa/GBView.h

@@ -1,14 +1,16 @@
 #import <Cocoa/Cocoa.h>
 #include <Core/gb.h>
 #import "GBJoystickListener.h"
-#import "GBShader.h"
 
-@interface GBView<GBJoystickListener> : NSOpenGLView
+@interface GBView<GBJoystickListener> : NSView
 - (void) flip;
 - (uint32_t *) pixels;
 @property GB_gameboy_t *gb;
 @property (nonatomic) BOOL shouldBlendFrameWithPrevious;
-@property GBShader *shader;
 @property (getter=isMouseHidingEnabled) BOOL mouseHidingEnabled;
 @property bool isRewinding;
+@property NSView *internalView;
+- (void) createInternalView;
+- (uint32_t *)currentBuffer;
+- (uint32_t *)previousBuffer;
 @end

Cocoa/GBView.m

@@ -1,6 +1,6 @@
-#import <OpenGL/gl.h>
 #import <Carbon/Carbon.h>
 #import "GBView.h"
+#import "GBViewGL.h"
 #import "GBButtons.h"
 #import "NSString+StringForKey.h"
 
@@ -17,29 +17,26 @@
     NSEventModifierFlags previousModifiers;
 }
 
-- (void) awakeFromNib
++ (instancetype)alloc
 {
-    NSOpenGLPixelFormatAttribute attrs[] =
-    {
-        NSOpenGLPFAOpenGLProfile,
-        NSOpenGLProfileVersion3_2Core,
-        0
-    };
-
-    NSOpenGLPixelFormat *pf = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs] ;
-
-    if (!pf)
-    {
-        NSLog(@"No OpenGL pixel format");
+    if (self == [GBView class]) {
+        return [GBViewGL alloc];
     }
-
-    NSOpenGLContext* context = [[NSOpenGLContext alloc] initWithFormat:pf shareContext:nil] ;
-
-    [self setPixelFormat:pf];
-
-    [self setOpenGLContext:context];
+    return [super alloc];
 }
 
++ (instancetype)allocWithZone:(struct _NSZone *)zone
+{
+    if (self == [GBView class]) {
+        return [GBViewGL allocWithZone: zone];
+    }
+    return [super allocWithZone:zone];
+}
+
+- (void) createInternalView
+{
+    assert(false && "createInternalView must not be inherited");
+}
 
 - (void) _init
 {
@@ -47,7 +44,6 @@
     image_buffers[1] = malloc(160 * 144 * 4);
     image_buffers[2] = malloc(160 * 144 * 4);
     _shouldBlendFrameWithPrevious = 1;
-    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(filterChanged) name:@"GBFilterChanged" object:nil];
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(ratioKeepingChanged) name:@"GBAspectChanged" object:nil];
     tracking_area = [ [NSTrackingArea alloc] initWithRect:(NSRect){}
                                                   options:NSTrackingMouseEnteredAndExited | NSTrackingActiveAlways | NSTrackingInVisibleRect
@@ -55,12 +51,9 @@
                                                  userInfo:nil];
     [self addTrackingArea:tracking_area];
     clockMultiplier = 1.0;
-}
-
-- (void) filterChanged
-{
-    [self setNeedsDisplay:YES];
-    self.shader = nil;
+    [self createInternalView];
+    [self addSubview:self.internalView];
+    self.internalView.autoresizingMask = NSViewWidthSizable | NSViewHeightSizable;
 }
 
 - (void) ratioKeepingChanged
@@ -132,29 +125,6 @@
     [super setFrame:frame];
 }
 
-- (void)drawRect:(NSRect)dirtyRect {
-    if (!self.shader) {
-        self.shader = [[GBShader alloc] initWithName:[[NSUserDefaults standardUserDefaults] objectForKey:@"GBFilter"]];
-    }
-
-    double scale = self.window.backingScaleFactor;
-    glViewport(0, 0, self.bounds.size.width * scale, self.bounds.size.height * scale);
-
-    if (_shouldBlendFrameWithPrevious) {
-        [self.shader renderBitmap:image_buffers[current_buffer]
-                         previous:image_buffers[(current_buffer + 2) % self.numberOfBuffers]
-                           inSize:self.bounds.size
-                            scale:scale];
-    }
-    else {
-        [self.shader renderBitmap:image_buffers[current_buffer]
-                         previous:NULL
-                           inSize:self.bounds.size
-                            scale:scale];
-    }
-    glFlush();
-}
-
 - (void) flip
 {
     if (underclockKeyDown && clockMultiplier > 0.5) {
@@ -362,4 +332,14 @@
     previousModifiers = event.modifierFlags;
 }
 
+- (uint32_t *)currentBuffer
+{
+    return image_buffers[current_buffer];
+}
+
+- (uint32_t *)previousBuffer
+{
+    return image_buffers[(current_buffer + 2) % self.numberOfBuffers];
+}
+
 @end

Cocoa/GBViewGL.h

@@ -0,0 +1,5 @@
+#import "GBView.h"
+
+@interface GBViewGL : GBView
+
+@end

Cocoa/GBViewGL.m

@@ -0,0 +1,26 @@
+#import "GBViewGL.h"
+#import "GBOpenGLView.h"
+
+@implementation GBViewGL
+
+- (void)createInternalView
+{
+    NSOpenGLPixelFormatAttribute attrs[] =
+    {
+        NSOpenGLPFAOpenGLProfile,
+        NSOpenGLProfileVersion3_2Core,
+        0
+    };
+    
+    NSOpenGLPixelFormat *pf = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs];
+    
+    assert(pf);
+    
+    NSOpenGLContext *context = [[NSOpenGLContext alloc] initWithFormat:pf shareContext:nil];
+ 
+    self.internalView = [[GBOpenGLView alloc] initWithFrame:self.frame pixelFormat:pf];
+    ((GBOpenGLView *)self.internalView).wantsBestResolutionOpenGLSurface = YES;
+    ((GBOpenGLView *)self.internalView).openGLContext = context;
+}
+
+@end