blob: ce8934b7b53cf5aa1b6b9c792ccd7d0f6d58224c [file] [log] [blame]
// Copyright 2019 Google LLC.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
#include "experimental/skottie_ios/SkMetalViewBridge.h"
#include "experimental/skottie_ios/SkottieMtkView.h"
#include "include/gpu/GrContext.h"
#include "include/gpu/GrContextOptions.h"
#import <Metal/Metal.h>
#import <MetalKit/MetalKit.h>
#import <UIKit/UIKit.h>
static UIStackView* make_skottie_stack(CGFloat width,
id<MTLDevice> metalDevice,
id<MTLCommandQueue> metalQueue,
GrContext* grContext) {
UIStackView* stack = [[UIStackView alloc] init];
[stack setAxis:UILayoutConstraintAxisVertical];
[stack setDistribution:UIStackViewDistributionEqualSpacing];
NSBundle* mainBundle = [NSBundle mainBundle];
NSArray<NSString*>* paths = [mainBundle pathsForResourcesOfType:@"json"
inDirectory:@"data"];
constexpr CGFloat kSpacing = 2;
CGFloat totalHeight = kSpacing;
for (NSUInteger i = 0; i < [paths count]; ++i) {
NSString* path = [paths objectAtIndex:i];
NSData* content = [NSData dataWithContentsOfFile:path];
if (!content) {
NSLog(@"'%@' not found", path);
continue;
}
SkottieMtkView* skottieView = [[SkottieMtkView alloc] init];
if (![skottieView loadAnimation:content]) {
continue;
}
[skottieView setDevice:metalDevice];
[skottieView setQueue:metalQueue];
[skottieView setGrContext:grContext];
SkMtkViewConfigForSkia(skottieView);
CGSize animSize = [skottieView size];
CGFloat height = animSize.width ? (width * animSize.height / animSize.width) : 0;
[skottieView setFrame:{{0, 0}, {width, height}}];
[skottieView setPreferredFramesPerSecond:30];
[[[skottieView heightAnchor] constraintEqualToConstant:height] setActive:true];
[[[skottieView widthAnchor] constraintEqualToConstant:width] setActive:true];
[stack addArrangedSubview:skottieView];
totalHeight += height + kSpacing;
}
[stack setFrame:{{0, 0}, {width, totalHeight}}];
return stack;
}
@interface AppViewController : UIViewController
@property (strong) id<MTLDevice> metalDevice;
@property (strong) id<MTLCommandQueue> metalQueue;
@property (strong) UIStackView* stackView;
@end
@implementation AppViewController {
sk_sp<GrContext> fGrContext;
}
- (void)dealloc {
fGrContext = nullptr;
[super dealloc];
}
- (void)loadView {
[self setView:[[UIView alloc] init]];
}
- (void)viewDidLoad {
[super viewDidLoad];
if (!fGrContext) {
[self setMetalDevice:MTLCreateSystemDefaultDevice()];
if(![self metalDevice]) {
NSLog(@"Metal is not supported on this device");
return;
}
[self setMetalQueue:[[self metalDevice] newCommandQueue]];
GrContextOptions grContextOptions; // set different options here.
fGrContext = SkMetalDeviceToGrContext([self metalDevice], [self metalQueue],
grContextOptions);
}
[self setStackView:make_skottie_stack([[UIScreen mainScreen] bounds].size.width,
[self metalDevice], [self metalQueue], fGrContext.get())];
CGFloat statusBarHeight = [[UIApplication sharedApplication] statusBarFrame].size.height;
CGSize mainScreenSize = [[UIScreen mainScreen] bounds].size;
CGRect scrollViewBounds = {{0, statusBarHeight},
{mainScreenSize.width, mainScreenSize.height - statusBarHeight}};
UIScrollView* scrollView = [[UIScrollView alloc] initWithFrame:scrollViewBounds];
[scrollView setContentSize:[[self stackView] frame].size];
[scrollView addSubview:[self stackView]];
[scrollView setBackgroundColor:[UIColor blackColor]];
UIView* mainView = [self view];
[mainView setBounds:{{0, 0}, mainScreenSize}];
[mainView setBackgroundColor:[UIColor whiteColor]];
[mainView addSubview:scrollView];
UITapGestureRecognizer* tapGestureRecognizer = [[UITapGestureRecognizer alloc] init];
[tapGestureRecognizer addTarget:self action:@selector(handleTap:)];
[mainView addGestureRecognizer:tapGestureRecognizer];
}
- (void)handleTap:(UIGestureRecognizer*)sender {
if (![sender state] == UIGestureRecognizerStateEnded) {
return;
}
NSArray<UIView*>* subviews = [[self stackView] subviews];
for (NSUInteger i = 0; i < [subviews count]; ++i) {
UIView* subview = [subviews objectAtIndex:i];
if (![subview isKindOfClass:[SkottieMtkView class]]) {
continue;
}
SkottieMtkView* skottieView = (SkottieMtkView*)subview;
BOOL paused = [skottieView togglePaused];
[skottieView setEnableSetNeedsDisplay:paused];
[skottieView setPaused:paused];
}
}
@end
@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow* window;
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication*)app didFinishLaunchingWithOptions:(NSDictionary*)ops {
[self setWindow:[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]];
[[self window] setRootViewController:[[AppViewController alloc] init]];
[[self window] makeKeyAndVisible];
return YES;
}
@end
int main(int argc, char* argv[]) {
@autoreleasepool {
return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}
}