ContinuousTexture.m

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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#import "ContinuousTexture.h"
 
@implementation ContinuousTexture
 
+ (void)registerWithRegistrar:(nonnull NSObject<FlutterPluginRegistrar>*)registrar {
  NSObject<FlutterTextureRegistry>* textureRegistry = [registrar textures];
  FlutterScenarioTestTexture* texture = [[FlutterScenarioTestTexture alloc] init];
  int64_t textureId = [textureRegistry registerTexture:texture];
  [NSTimer scheduledTimerWithTimeInterval:0.05
                                  repeats:YES
                                    block:^(NSTimer* _Nonnull timer) {
                                      [textureRegistry textureFrameAvailable:textureId];
                                    }];
}
 
@end
 
@implementation FlutterScenarioTestTexture
 
- (CVPixelBufferRef _Nullable)copyPixelBuffer {
  return [self pixelBuffer];
}
 
- (CVPixelBufferRef)pixelBuffer {
  NSDictionary* options = @{
    // This key is required to generate SKPicture with CVPixelBufferRef in metal.
    (NSString*)kCVPixelBufferMetalCompatibilityKey : @YES
  };
  CVPixelBufferRef pxbuffer = NULL;
  CVReturn status = CVPixelBufferCreate(kCFAllocatorDefault, 200, 200, kCVPixelFormatType_32BGRA,
                                        (__bridge CFDictionaryRef)options, &pxbuffer);
 
  NSAssert(status == kCVReturnSuccess && pxbuffer != NULL, @"Failed to create pixel buffer.");
  return pxbuffer;
}
 
@end