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GoldenImage Class Reference

#import <GoldenImage.h>

Inheritance diagram for GoldenImage:

Instance Methods

(instancetype) - initWithGoldenNamePrefix:
 
(BOOL) - compareGoldenToImage:rmesThreshold:
 
(NS_INLINE NSString *) - _platformName [implementation]
 

Properties

NSString * goldenName
 
UIImage * image
 

Detailed Description

Definition at line 12 of file GoldenImage.h.

Method Documentation

◆ _platformName

- (NS_INLINE NSString *) _platformName
implementation

Definition at line 102 of file GoldenImage.m.

102 {
103 NSString* systemVersion = UIDevice.currentDevice.systemVersion;
104 NSString* simulatorName =
105 [[NSProcessInfo processInfo].environment objectForKey:@"SIMULATOR_DEVICE_NAME"];
106 if (simulatorName) {
107 return [NSString stringWithFormat:@"%@_%@_simulator", simulatorName, systemVersion];
108 }
109
110 size_t size;
111 sysctlbyname("hw.model", NULL, &size, NULL, 0);
112 char* answer = malloc(size);
113 sysctlbyname("hw.model", answer, &size, NULL, 0);
114
115 NSString* results = [NSString stringWithUTF8String:answer];
116 free(answer);
117 return results;
118}
dart::malloc
void * malloc(size_t size)
Definition: allocation.cc:19
flutter::size
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Definition: switches.h:259

◆ compareGoldenToImage:rmesThreshold:

- (BOOL) compareGoldenToImage: (UIImage*)  image
rmesThreshold: (double)  rmesThreshold 

Definition at line 1 of file GoldenImage.m.

29 :(UIImage*)image rmesThreshold:(double)rmesThreshold {
30 if (!self.image || !image) {
31 os_log_error(OS_LOG_DEFAULT, "GOLDEN DIFF FAILED: image does not exists.");
32 return NO;
33 }
34 CGImageRef imageRefA = [self.image CGImage];
35 CGImageRef imageRefB = [image CGImage];
36
37 NSUInteger widthA = CGImageGetWidth(imageRefA);
38 NSUInteger heightA = CGImageGetHeight(imageRefA);
39 NSUInteger widthB = CGImageGetWidth(imageRefB);
40 NSUInteger heightB = CGImageGetHeight(imageRefB);
41
42 if (widthA != widthB || heightA != heightB) {
43 os_log_error(OS_LOG_DEFAULT, "GOLDEN DIFF FAILED: images sizes do not match.");
44 return NO;
45 }
46 NSUInteger bytesPerPixel = 4;
47 NSUInteger size = widthA * heightA * bytesPerPixel;
48 NSMutableData* rawA = [NSMutableData dataWithLength:size];
49 NSMutableData* rawB = [NSMutableData dataWithLength:size];
50
51 if (!rawA || !rawB) {
52 os_log_error(OS_LOG_DEFAULT, "GOLDEN DIFF FAILED: image data length do not match.");
53 return NO;
54 }
55
56 CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
57
58 NSUInteger bytesPerRow = bytesPerPixel * widthA;
59 NSUInteger bitsPerComponent = 8;
60 CGContextRef contextA =
61 CGBitmapContextCreate(rawA.mutableBytes, widthA, heightA, bitsPerComponent, bytesPerRow,
62 colorSpace, kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
63
64 CGContextDrawImage(contextA, CGRectMake(0, 0, widthA, heightA), imageRefA);
65 CGContextRelease(contextA);
66
67 CGContextRef contextB =
68 CGBitmapContextCreate(rawB.mutableBytes, widthA, heightA, bitsPerComponent, bytesPerRow,
69 colorSpace, kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
70 CGColorSpaceRelease(colorSpace);
71
72 CGContextDrawImage(contextB, CGRectMake(0, 0, widthA, heightA), imageRefB);
73 CGContextRelease(contextB);
74
75 const char* apos = rawA.mutableBytes;
76 const char* bpos = rawB.mutableBytes;
77 double sum = 0.0;
78 for (size_t i = 0; i < size; ++i, ++apos, ++bpos) {
79 // Skip transparent pixels.
80 if (*apos == 0 && *bpos == 0 && i % 4 == 0) {
81 i += 3;
82 apos += 3;
83 bpos += 3;
84 } else {
85 double aval = *apos;
86 double bval = *bpos;
87 double diff = aval - bval;
88 sum += diff * diff;
89 }
90 }
91 double rmse = sqrt(sum / size);
92 if (rmse > rmesThreshold) {
93 os_log_error(
94 OS_LOG_DEFAULT,
95 "GOLDEN DIFF FAILED: image diff greater than threshold. Current diff: %@, threshold: %@",
96 @(rmse), @(rmesThreshold));
97 return NO;
98 }
99 return YES;
100}
i
int i
Definition: fl_socket_accessible.cc:18
GoldenImage::image
UIImage * image
Definition: GoldenImage.h:15
skvx::sqrt
SIN Vec< N, float > sqrt(const Vec< N, float > &x)
Definition: SkVx.h:706

◆ initWithGoldenNamePrefix:

- (instancetype) initWithGoldenNamePrefix: (NSString*)  prefix

Definition at line 1 of file GoldenImage.m.

17 :(NSString*)prefix {
18 self = [super init];
19 if (self) {
20 _goldenName = [prefix stringByAppendingString:_platformName()];
21 NSBundle* bundle = [NSBundle bundleForClass:[self class]];
22 NSURL* goldenURL = [bundle URLForResource:_goldenName withExtension:@"png"];
23 NSData* data = [NSData dataWithContentsOfURL:goldenURL];
24 _image = [[UIImage alloc] initWithData:data];
25 }
26 return self;
27}
data
std::shared_ptr< const fml::Mapping > data
Definition: texture_gles.cc:63

Property Documentation

◆ goldenName

- (NSString*) goldenName
readnonatomiccopy

Definition at line 14 of file GoldenImage.h.

◆ image

- (UIImage*) image
readnonatomicstrong

Definition at line 15 of file GoldenImage.h.

The documentation for this class was generated from the following files:
Generated on Sun Jun 23 2024 21:57:58 for Flutter Engine by doxygen 1.9.4