0f16c57cb0
This reverts commit 61d0084461
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Reason for revert: reverting base change for chrome roll
Original change's description:
> Fix flush change breaks.
>
> Change-Id: I5b61e2939f08b42d1fef457f73631b7bf5a4f933
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/290824
> Commit-Queue: Greg Daniel <egdaniel@google.com>
> Commit-Queue: Ben Wagner <bungeman@google.com>
> Auto-Submit: Greg Daniel <egdaniel@google.com>
> Reviewed-by: Ben Wagner <bungeman@google.com>
TBR=egdaniel@google.com,bungeman@google.com
Change-Id: I4ae13414226f2532fcfd81236c2b857000fa4c6b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/290833
Reviewed-by: Greg Daniel <egdaniel@google.com>
146 lines
4.9 KiB
Plaintext
146 lines
4.9 KiB
Plaintext
// Copyright 2019 Google LLC.
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// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
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// This is an example of a minimal iOS application that uses Skia to draw to
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// a Metal drawable.
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// Much of this code is copied from the default application created by XCode.
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#include "tools/skottie_ios_app/SkMetalViewBridge.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkSurface.h"
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#include "include/core/SkTime.h"
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#include "include/effects/SkGradientShader.h"
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#include "include/gpu/GrBackendSurface.h"
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#include "include/gpu/mtl/GrMtlTypes.h"
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#import <Metal/Metal.h>
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#import <MetalKit/MetalKit.h>
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#import <UIKit/UIKit.h>
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////////////////////////////////////////////////////////////////////////////////
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static void config_paint(SkPaint* paint) {
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if (!paint->getShader()) {
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const SkColor4f colors[2] = {SkColors::kBlack, SkColors::kWhite};
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const SkPoint points[2] = {{0, -1024}, {0, 1024}};
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paint->setShader(SkGradientShader::MakeLinear(points, colors, nullptr, nullptr, 2,
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SkTileMode::kClamp, 0, nullptr));
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}
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}
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static void draw_example(SkSurface* surface, const SkPaint& paint, double rotation) {
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SkCanvas* canvas = surface->getCanvas();
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canvas->translate(surface->width() * 0.5f, surface->height() * 0.5f);
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canvas->rotate(rotation);
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canvas->drawPaint(paint);
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}
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////////////////////////////////////////////////////////////////////////////////
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@interface AppViewDelegate : NSObject <MTKViewDelegate>
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@property (assign, nonatomic) GrContext* grContext; // non-owning pointer.
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@property (assign, nonatomic) id<MTLCommandQueue> metalQueue;
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@end
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@implementation AppViewDelegate {
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SkPaint fPaint;
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}
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- (void)drawInMTKView:(nonnull MTKView *)view {
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if (![self grContext] || !view) {
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return;
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}
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// Do as much as possible before creating surface.
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config_paint(&fPaint);
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float rotation = (float)(180 * 1e-9 * SkTime::GetNSecs());
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// Create surface:
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sk_sp<SkSurface> surface = SkMtkViewToSurface(view, [self grContext]);
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if (!surface) {
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NSLog(@"error: no sksurface");
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return;
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}
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draw_example(surface.get(), fPaint, rotation);
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// Must flush *and* present for this to work!
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surface->flush();
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surface = nullptr;
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id<MTLCommandBuffer> commandBuffer = [[self metalQueue] commandBuffer];
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[commandBuffer presentDrawable:[view currentDrawable]];
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[commandBuffer commit];
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}
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- (void)mtkView:(nonnull MTKView *)view drawableSizeWillChange:(CGSize)size {
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// change anything on size change?
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}
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@end
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////////////////////////////////////////////////////////////////////////////////
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@interface AppViewController : UIViewController
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@property (strong, nonatomic) id<MTLDevice> metalDevice;
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@property (strong, nonatomic) id<MTLCommandQueue> metalQueue;
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@end
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@implementation AppViewController {
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GrContextHolder fGrContext;
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}
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- (void)loadView {
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[self setView:[[MTKView alloc] initWithFrame:[[UIScreen mainScreen] bounds] device:nil]];
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}
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- (void)viewDidLoad {
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[super viewDidLoad];
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if (!fGrContext) {
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[self setMetalDevice:MTLCreateSystemDefaultDevice()];
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[self setMetalQueue:[[self metalDevice] newCommandQueue]];
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fGrContext = SkMetalDeviceToGrContext([self metalDevice], [self metalQueue]);
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}
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if (![self view] || ![self metalDevice]) {
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NSLog(@"Metal is not supported on this device");
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self.view = [[UIView alloc] initWithFrame:self.view.frame];
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return;
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}
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MTKView* mtkView = (MTKView*)[self view];
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[mtkView setDevice:[self metalDevice]];
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[mtkView setBackgroundColor:[UIColor blackColor]];
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SkMtkViewConfigForSkia(mtkView);
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AppViewDelegate* viewDelegate = [[AppViewDelegate alloc] init];
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[viewDelegate setGrContext:fGrContext.get()];
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[viewDelegate setMetalQueue:[self metalQueue]];
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[viewDelegate mtkView:mtkView drawableSizeWillChange:[mtkView bounds].size];
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[mtkView setDelegate:viewDelegate];
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}
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@end
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////////////////////////////////////////////////////////////////////////////////
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@interface AppDelegate : UIResponder <UIApplicationDelegate>
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@property (strong, nonatomic) UIWindow *window;
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@end
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@implementation AppDelegate
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- (BOOL)application:(UIApplication *)app didFinishLaunchingWithOptions:(NSDictionary*)opts {
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// Override point for customization after application launch.
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[self setWindow:[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]];
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[[self window] setFrame:[[UIScreen mainScreen] bounds]];
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[[self window] setRootViewController:[[AppViewController alloc] init]];
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[[self window] makeKeyAndVisible];
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return YES;
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}
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@end
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////////////////////////////////////////////////////////////////////////////////
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int main(int argc, char* argv[]) {
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@autoreleasepool {
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return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
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}
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}
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