139 lines
3.8 KiB
Objective-C
139 lines
3.8 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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#import "RCTDefines.h"
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#if RCT_DEV
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@implementation RCTFPSGraph
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{
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CAShapeLayer *_graph;
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NSString *_name;
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NSTimeInterval _prevTime;
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RCTFPSGraphPosition _position;
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UILabel *_label;
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float *_frames;
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int _frameCount;
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int _maxFPS;
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int _minFPS;
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int _length;
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int _margin;
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int _height;
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}
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- (instancetype)initWithFrame:(CGRect)frame graphPosition:(RCTFPSGraphPosition)position name:(NSString *)name color:(UIColor *)color
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{
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if ((self = [super initWithFrame:frame])) {
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_margin = 2;
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_prevTime = -1;
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_maxFPS = 0;
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_minFPS = 60;
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_length = (frame.size.width - 2 * _margin) / 2;
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_height = frame.size.height - 2 * _margin;
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_frames = malloc(sizeof(float) * _length);
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memset(_frames, 0, sizeof(float) * _length);
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_name = name ?: @"FPS";
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_position = position ?: RCTFPSGraphPositionLeft;
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color = color ?: [UIColor greenColor];
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_graph = [self createGraph:color];
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_label = [self createLabel:color];
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[self addSubview:_label];
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[self.layer addSublayer:_graph];
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}
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return self;
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}
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RCT_NOT_IMPLEMENTED(-initWithFrame:(CGRect)frame)
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RCT_NOT_IMPLEMENTED(-initWithCoder:(NSCoder *)aDecoder)
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- (void)dealloc
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{
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free(_frames);
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}
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- (void)layoutSubviews
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{
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[super layoutSubviews];
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}
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- (CAShapeLayer *)createGraph:(UIColor *)color
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{
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CGFloat left = _position & RCTFPSGraphPositionLeft ? 0 : _length;
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CAShapeLayer *graph = [[CAShapeLayer alloc] init];
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graph.frame = CGRectMake(left, 0, 2 * _margin + _length, self.frame.size.height);
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graph.backgroundColor = [[color colorWithAlphaComponent:.2] CGColor];
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graph.fillColor = [color CGColor];
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return graph;
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}
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- (UILabel *)createLabel:(UIColor *)color
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{
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CGFloat left = _position & RCTFPSGraphPositionLeft ? 2 * _margin + _length : 0;
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UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(left, 0, _length, self.frame.size.height)];
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label.textColor = color;
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label.font = [UIFont systemFontOfSize:9];
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label.minimumScaleFactor = .5;
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label.adjustsFontSizeToFitWidth = YES;
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label.numberOfLines = 3;
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label.lineBreakMode = NSLineBreakByWordWrapping;
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label.textAlignment = NSTextAlignmentCenter;
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return label;
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}
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- (void)tick:(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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float 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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_label.text = [NSString stringWithFormat:@"%@\n%d FPS\n(%d - %d)", _name, (int)fps, _minFPS, _maxFPS];
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float scale = 60.0 / _height;
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for (int 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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if (_position & RCTFPSGraphPositionLeft) {
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CGPathMoveToPoint(path, NULL, _margin, _margin + _height);
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for (int i = 0; i < _length; i++) {
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CGPathAddLineToPoint(path, NULL, _margin + i, _margin + _height - _frames[i]);
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}
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CGPathAddLineToPoint(path, NULL, _margin + _length - 1, _margin + _height);
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} else {
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CGPathMoveToPoint(path, NULL, _margin + _length - 1, _margin + _height);
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for (int i = 0; i < _length; i++) {
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CGPathAddLineToPoint(path, NULL, _margin + _length - i - 1, _margin + _height - _frames[i]);
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}
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CGPathAddLineToPoint(path, NULL, _margin, _margin + _height);
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}
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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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