127 lines
2.8 KiB
Objective-C
127 lines
2.8 KiB
Objective-C
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "RCTFPSGraph.h"
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#import "RCTAssert.h"
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#if RCT_DEV
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@interface RCTFPSGraph()
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@property (nonatomic, strong, readonly) CAShapeLayer *graph;
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@property (nonatomic, strong, readonly) UILabel *label;
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@end
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@implementation RCTFPSGraph
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{
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CAShapeLayer *_graph;
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UILabel *_label;
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CGFloat *_frames;
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UIColor *_color;
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NSTimeInterval _prevTime;
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NSUInteger _frameCount;
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NSUInteger _FPS;
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NSUInteger _maxFPS;
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NSUInteger _minFPS;
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NSUInteger _length;
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NSUInteger _height;
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}
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- (instancetype)initWithFrame:(CGRect)frame color:(UIColor *)color
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{
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if ((self = [super initWithFrame:frame])) {
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_frameCount = -1;
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_prevTime = -1;
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_maxFPS = 0;
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_minFPS = 60;
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_length = (NSUInteger)floor(frame.size.width);
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_height = (NSUInteger)floor(frame.size.height);
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_frames = calloc(sizeof(CGFloat), _length);
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_color = color;
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[self.layer addSublayer:self.graph];
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[self addSubview:self.label];
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}
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return self;
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}
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- (void)dealloc
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{
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free(_frames);
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}
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RCT_NOT_IMPLEMENTED(- (instancetype)initWithFrame:(CGRect)frame)
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RCT_NOT_IMPLEMENTED(- (instancetype)initWithCoder:(NSCoder *)aDecoder)
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- (CAShapeLayer *)graph
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{
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if (!_graph) {
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_graph = [CAShapeLayer new];
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_graph.frame = self.bounds;
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_graph.backgroundColor = [_color colorWithAlphaComponent:0.2].CGColor;
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_graph.fillColor = _color.CGColor;
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}
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return _graph;
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}
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- (UILabel *)label
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{
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if (!_label) {
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_label = [[UILabel alloc] initWithFrame:self.bounds];
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_label.font = [UIFont boldSystemFontOfSize:13];
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_label.textAlignment = NSTextAlignmentCenter;
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}
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return _label;
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}
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- (void)onTick:(NSTimeInterval)timestamp
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{
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_frameCount++;
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if (_prevTime == -1) {
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_prevTime = timestamp;
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} else if (timestamp - _prevTime >= 1) {
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_FPS = round(_frameCount / (timestamp - _prevTime));
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_minFPS = MIN(_minFPS, _FPS);
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_maxFPS = MAX(_maxFPS, _FPS);
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dispatch_async(dispatch_get_main_queue(), ^{
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self->_label.text = [NSString stringWithFormat:@"%lu", (unsigned long)self->_FPS];
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});
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CGFloat scale = 60.0 / _height;
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for (NSUInteger i = 0; i < _length - 1; i++) {
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_frames[i] = _frames[i + 1];
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}
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_frames[_length - 1] = _FPS / scale;
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CGMutablePathRef path = CGPathCreateMutable();
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CGPathMoveToPoint(path, NULL, 0, _height);
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for (NSUInteger i = 0; i < _length; i++) {
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CGPathAddLineToPoint(path, NULL, i, _height - _frames[i]);
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}
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CGPathAddLineToPoint(path, NULL, _length - 1, _height);
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_graph.path = path;
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CGPathRelease(path);
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_prevTime = timestamp;
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_frameCount = 0;
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}
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}
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@end
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#endif
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