@@ -1,22 +1,23 @@
// +build darwin

// Package ns provides access to Apple's AppKit API (https://developer.apple.com/documentation/appkit).
// Package appkit provides access to Apple's AppKit API
// (https://developer.apple.com/documentation/appkit).
//
// This package is in very early stages of development.
// It's a minimal implementation with scope limited to
// supporting the movingtriangle example.
package ns
package appkit

import (
	"unsafe"

	"dmitri.shuralyov.com/gpu/mtl/example/movingtriangle/internal/ca"
	"dmitri.shuralyov.com/gpu/mtl/example/movingtriangle/internal/coreanim"
)

/*
#include "ns.h"
#include "appkit.h"
*/
import "C"

// Window is a window that an app displays on the screen.
//
@@ -46,20 +47,22 @@ type View struct {
}

// SetLayer sets v.layer to l.
//
// Reference: https://developer.apple.com/documentation/appkit/nsview/1483298-layer.
func (v View) SetLayer(l ca.Layer) {
func (v View) SetLayer(l coreanim.Layer) {
	C.View_SetLayer(v.view, l.Layer())
}

// SetWantsLayer sets v.wantsLayer to wantsLayer.
//
// Reference: https://developer.apple.com/documentation/appkit/nsview/1483695-wantslayer.
func (v View) SetWantsLayer(wantsLayer bool) {
	switch wantsLayer {
	case true:
		C.View_SetWantsLayer(v.view, 1)
	case false:
		C.View_SetWantsLayer(v.view, 0)
	C.View_SetWantsLayer(v.view, toCBool(wantsLayer))
}

func toCBool(b bool) C.BOOL {
	if b {
		return 1
	}
	return 0
}

@@ -1,9 +1,9 @@
// +build darwin

#import <Cocoa/Cocoa.h>
#include "ns.h"
#include "appkit.h"

void * Window_ContentView(void * window) {
	return ((NSWindow *)window).contentView;
}

@@ -1,24 +1,25 @@
// +build darwin

// Package ca provides access to Apple's Core Animation API (https://developer.apple.com/documentation/quartzcore).
// Package coreanim provides access to Apple's Core Animation API
// (https://developer.apple.com/documentation/quartzcore).
//
// This package is in very early stages of development.
// It's a minimal implementation with scope limited to
// supporting the movingtriangle example.
package ca
package coreanim

import (
	"errors"
	"unsafe"

	"dmitri.shuralyov.com/gpu/mtl"
)

/*
#cgo LDFLAGS: -framework QuartzCore -framework Foundation
#include "ca.h"
#include "coreanim.h"
*/
import "C"

// Layer is an object that manages image-based content and
// allows you to perform animations on that content.
@@ -90,16 +91,11 @@ func (ml MetalLayer) SetMaximumDrawableCount(count int) {
// SetDisplaySyncEnabled controls whether the Metal layer and its drawables
// are synchronized with the display's refresh rate.
//
// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer/2887087-displaysyncenabled.
func (ml MetalLayer) SetDisplaySyncEnabled(enabled bool) {
	switch enabled {
	case true:
		C.MetalLayer_SetDisplaySyncEnabled(ml.metalLayer, 1)
	case false:
		C.MetalLayer_SetDisplaySyncEnabled(ml.metalLayer, 0)
	}
	C.MetalLayer_SetDisplaySyncEnabled(ml.metalLayer, toCBool(enabled))
}

// SetDrawableSize sets the size, in pixels, of textures for rendering layer content.
//
// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer/1478174-drawablesize.
@@ -133,5 +129,12 @@ func (md MetalDrawable) Drawable() unsafe.Pointer { return md.metalDrawable }
//
// Reference: https://developer.apple.com/documentation/quartzcore/cametaldrawable/1478159-texture.
func (md MetalDrawable) Texture() mtl.Texture {
	return mtl.NewTexture(C.MetalDrawable_Texture(md.metalDrawable))
}

func toCBool(b bool) C.BOOL {
	if b {
		return 1
	}
	return 0
}

@@ -1,9 +1,9 @@
// +build darwin

#import <QuartzCore/QuartzCore.h>
#include "ca.h"
#include "coreanim.h"

void * MakeMetalLayer() {
	return [[CAMetalLayer alloc] init];
}

@@ -12,12 +12,12 @@ import (
	"runtime"
	"time"
	"unsafe"

	"dmitri.shuralyov.com/gpu/mtl"
	"dmitri.shuralyov.com/gpu/mtl/example/movingtriangle/internal/ca"
	"dmitri.shuralyov.com/gpu/mtl/example/movingtriangle/internal/ns"
	"dmitri.shuralyov.com/gpu/mtl/example/movingtriangle/internal/appkit"
	"dmitri.shuralyov.com/gpu/mtl/example/movingtriangle/internal/coreanim"
	"github.com/go-gl/glfw/v3.3/glfw"
	"golang.org/x/image/math/f32"
)

func init() {
@@ -55,17 +55,17 @@ func run() error {
	if err != nil {
		return err
	}
	defer window.Destroy()

	ml := ca.MakeMetalLayer()
	ml := coreanim.MakeMetalLayer()
	ml.SetDevice(device)
	ml.SetPixelFormat(mtl.PixelFormatBGRA8UNorm)
	ml.SetDrawableSize(window.GetFramebufferSize())
	ml.SetMaximumDrawableCount(3)
	ml.SetDisplaySyncEnabled(true)
	cv := ns.NewWindow(window.GetCocoaWindow()).ContentView()
	cv := appkit.NewWindow(window.GetCocoaWindow()).ContentView()
	cv.SetLayer(ml)
	cv.SetWantsLayer(true)

	// Set callbacks.
	window.SetFramebufferSizeCallback(func(_ *glfw.Window, width, height int) {