skia2/tools/skottie_ios_app/main.mm
Hal Canary 118df7cf62 skottie_ios_app: Add OpenGL.
- Consolidate Skottie logic into SkottieViewController class that no longer
    knows about which backend we use.

  - Abstract out SkiaViewController interdace which SkottieViewController
    implements.

  - Create three classes SkiaGLView, SkiaUIView, and SkiaMtkView, which all
    accept SkiaViewController objects but override GLKView, UIView, and
    MTKView.

  - SkAnimationDraw and SkTimeKeeper now SkiaViewController
    implementation details, no longer shared in headers.

Cq-Include-Trybots: skia/skia.primary:Build-Mac-Clang-arm64-Debug-iOS_Metal
Cq-Include-Trybots: skia/skia.primary:Build-Mac-Clang-arm64-Debug-iOS
Change-Id: I96ff2911d63da7d5327c81f91996b2a1b12c4419
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/261178
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
2020-01-14 16:16:32 +00:00

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// 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 "tools/skottie_ios_app/SkiaContext.h"
#include "tools/skottie_ios_app/SkottieViewController.h"
#include "include/core/SkTypes.h"
#import <UIKit/UIKit.h>
#include <cstdlib>
@interface AppViewController : UIViewController
@property (strong) SkiaContext* skiaContext;
@property (strong) UIStackView* stackView;
@end
@implementation AppViewController
- (void)loadView {
[self setView:[[UIView alloc] init]];
}
- (void)viewDidLoad {
[super viewDidLoad];
if (![self skiaContext]) {
#if (SK_SUPPORT_GPU && defined(SK_METAL) && !defined(SK_BUILD_FOR_GOOGLE3))
[self setSkiaContext:MakeSkiaMetalContext()];
#elif (SK_SUPPORT_GPU && defined(SK_GL) && !defined(SK_BUILD_FOR_GOOGLE3))
[self setSkiaContext:MakeSkiaGLContext()];
#else
[self setSkiaContext:MakeSkiaUIContext()];
#endif
if (![self skiaContext]) {
NSLog(@"abort: failed to make skia context.");
std::abort();
}
}
CGFloat screenWidth = [[UIScreen mainScreen] bounds].size.width;
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;
}
SkottieViewController* controller = [[SkottieViewController alloc] init];
if (![controller loadAnimation:content]) {
continue;
}
CGSize animSize = [controller size];
CGFloat height = animSize.width ? (screenWidth * animSize.height / animSize.width) : 0;
CGRect frame = {{0, 0}, {screenWidth, height}};
UIView* skiaView = [[self skiaContext] makeViewWithController:controller withFrame:frame];
[[[skiaView heightAnchor] constraintEqualToConstant:height] setActive:true];
[[[skiaView widthAnchor] constraintEqualToConstant:screenWidth] setActive:true];
[skiaView setNeedsDisplay];
[stack addArrangedSubview:skiaView];
totalHeight += height + kSpacing;
}
[stack setFrame:{{0, 0}, {screenWidth, totalHeight}}];
[stack setNeedsDisplay];
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:[stack frame].size];
[scrollView addSubview:stack];
[scrollView setBackgroundColor:[UIColor blackColor]];
[scrollView setNeedsDisplay];
[self setStackView:stack];
UIView* mainView = [self view];
[mainView setBounds:{{0, 0}, mainScreenSize}];
[mainView setBackgroundColor:[UIColor whiteColor]];
[mainView addSubview:scrollView];
[mainView setNeedsDisplay];
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* uIView = [subviews objectAtIndex:i];
if (SkiaViewController* controller = [[self skiaContext] getViewController:uIView]) {
[controller togglePaused];
[uIView setNeedsDisplay];
}
}
}
@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]));
}
}