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Classes | Functions | Variables
FlutterSurfaceManager.mm File Reference
`#import "flutter/shell/platform/darwin/macos/framework/Source/FlutterSurfaceManager.h"`
`#import <Metal/Metal.h>`
`#include <algorithm>`
`#include "flutter/fml/logging.h"`
`#import "flutter/shell/platform/darwin/macos/framework/Source/FlutterSurface.h"`

Go to the source code of this file.

## Functions
static NSColor * | GetBorderColorForLayer (int layer)
static void | UpdateContentSubLayers (CALayer *layer, IOSurfaceRef surface, CGFloat scale, CGSize surfaceSize, NSColor *borderColor, const std::vector< FlutterRect > &paintRegion)

## Variables
static const double | kIdleDelay = 1.0
static const int | kSurfaceEvictionAge = 30

## Function Documentation

## ◆ GetBorderColorForLayer()

static NSColor* GetBorderColorForLayer | ( | int | layer | ) |
| static

Definition at line 48 of file FlutterSurfaceManager.mm.

48 {
49 NSArray* colors = @[
50 [NSColor yellowColor],
51 [NSColor cyanColor],
52 [NSColor magentaColor],
53 [NSColor greenColor],
54 [NSColor purpleColor],
55 [NSColor orangeColor],
56 [NSColor blueColor],
57 ];
58 return colors[layer % colors.count];
59 }

## ◆ UpdateContentSubLayers()

static void UpdateContentSubLayers | ( | CALayer * | layer,
|  | IOSurfaceRef | surface,
|  | CGFloat | scale,
|  | CGSize | surfaceSize,
|  | NSColor * | borderColor,
|  | const std::vector< FlutterRect > & | paintRegion
| ) |  |
| static

Creates sublayers for given layer, each one displaying a portion of the of the surface determined by a rectangle in the provided paint region.

Definition at line 63 of file FlutterSurfaceManager.mm.

68 {
69 // Adjust sublayer count to paintRegion count.
70 while (layer.sublayers.count > paintRegion.size()) {
71 [layer.sublayers.lastObject removeFromSuperlayer];
72 }
73
74 while (layer.sublayers.count < paintRegion.size()) {
75 CALayer* newLayer = [CALayer layer];
76 [layer addSublayer:newLayer];
77 }
78
79 for (size_t i = 0; i < paintRegion.size(); i++) {
80 CALayer* subLayer = [layer.sublayers objectAtIndex:i];
81 const auto& rect = paintRegion[i];
82 subLayer.frame = CGRectMake(rect.left / scale, rect.top / scale,
83 (rect.right - rect.left) / scale, (rect.bottom - rect.top) / scale);
84
85 double width = surfaceSize.width;
86 double height = surfaceSize.height;
87
88 subLayer.contentsRect =
89 CGRectMake(rect.left / width, rect.top / height, (rect.right - rect.left) / width,
90 (rect.bottom - rect.top) / height);
91
92 if (borderColor != nil) {
93 // Visualize sublayer
94 subLayer.borderColor = borderColor.CGColor;
95 subLayer.borderWidth = 1.0;
96 }
97
98 subLayer.contents = (__bridge id)surface;
99 }
100 }

## Variable Documentation

## ◆ kIdleDelay

const double kIdleDelay = 1.0
| static

Definition at line 262 of file FlutterSurfaceManager.mm.

## ◆ kSurfaceEvictionAge

const int kSurfaceEvictionAge = 30
| static

Definition at line 267 of file FlutterSurfaceManager.mm.