1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
#import "GBCPUView.h"
#define SAMPLE_COUNT 0x100 // ~4 seconds
@implementation GBCPUView
{
double _samples[SAMPLE_COUNT];
size_t _position;
}
- (void)drawRect:(NSRect)dirtyRect
{
CGRect bounds = self.bounds;
NSSize size = bounds.size;
unsigned factor = [[self.window screen] backingScaleFactor];
NSBitmapImageRep *maskBitmap = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:NULL
pixelsWide:(unsigned)size.width * factor
pixelsHigh:(unsigned)size.height * factor
bitsPerSample:8
samplesPerPixel:2
hasAlpha:true
isPlanar:false
colorSpaceName:NSDeviceWhiteColorSpace
bytesPerRow:size.width * 2 * factor
bitsPerPixel:16];
NSGraphicsContext *mainContext = [NSGraphicsContext currentContext];
NSColor *greenColor, *redColor;
if (@available(macOS 10.10, *)) {
greenColor = [NSColor systemGreenColor];
redColor = [NSColor systemRedColor];
}
else {
greenColor = [NSColor colorWithRed:3.0 / 16 green:0.5 blue:5.0 / 16 alpha:1.0];
redColor = [NSColor colorWithRed:13.0 / 16 green:0.25 blue:0.25 alpha:1.0];
}
NSBitmapImageRep *colorBitmap = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:NULL
pixelsWide:SAMPLE_COUNT
pixelsHigh:1
bitsPerSample:8
samplesPerPixel:3
hasAlpha:false
isPlanar:false
colorSpaceName:NSDeviceRGBColorSpace
bytesPerRow:SAMPLE_COUNT * 4
bitsPerPixel:32];
unsigned lastFill = 0;
NSBezierPath *line = [NSBezierPath bezierPath];
bool isRed = false;
{
double sample = _samples[_position % SAMPLE_COUNT];
[line moveToPoint:NSMakePoint(0,
(sample * (size.height - 1) + 0.5) * factor)];
isRed = sample == 1;
}
[NSGraphicsContext setCurrentContext:[NSGraphicsContext graphicsContextWithBitmapImageRep:colorBitmap]];
for (unsigned i = 1; i < SAMPLE_COUNT; i++) {
double sample = _samples[(i + _position) % SAMPLE_COUNT];
[line lineToPoint:NSMakePoint(size.width * i * factor / (SAMPLE_COUNT - 1),
(sample * (size.height - 1) + 0.5) * factor)];
if (isRed != (sample == 1)) {
// Color changed
[(isRed? redColor : greenColor) setFill];
NSRectFill(CGRectMake(lastFill, 0, i - lastFill, 1));
lastFill = i;
isRed ^= true;
}
}
[(isRed? redColor : greenColor) setFill];
NSRectFill(CGRectMake(lastFill, 0, SAMPLE_COUNT - lastFill, 1));
NSBezierPath *fill = [line copy];
[fill lineToPoint:NSMakePoint(size.width * factor, 0)];
[fill lineToPoint:NSMakePoint(0, 0)];
NSColor *strokeColor = [NSColor whiteColor];
NSColor *fillColor = [strokeColor colorWithAlphaComponent:1 / 3.0];
[NSGraphicsContext setCurrentContext:[NSGraphicsContext graphicsContextWithBitmapImageRep:maskBitmap]];
[fillColor setFill];
[fill fill];
[strokeColor setStroke];
[line setLineWidth:factor];
[line stroke];
CGContextRef maskContext = CGContextRetain([NSGraphicsContext currentContext].graphicsPort);
[NSGraphicsContext setCurrentContext:mainContext];
CGContextSaveGState(mainContext.graphicsPort);
CGImageRef maskImage = CGBitmapContextCreateImage(maskContext);
CGContextClipToMask(mainContext.graphicsPort, bounds, maskImage);
CGImageRelease(maskImage);
NSImage *colors = [[NSImage alloc] initWithSize:NSMakeSize(SAMPLE_COUNT, 1)];
[colors addRepresentation:colorBitmap];
[colors drawInRect:bounds];
CGContextRestoreGState(mainContext.graphicsPort);
CGContextRelease(maskContext);
[super drawRect:dirtyRect];
}
- (void)addSample:(double)sample
{
_samples[_position++] = sample;
if (_position == SAMPLE_COUNT) {
_position = 0;
}
}
@end
|
