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.

                                                  {
  NSArray* colors = @[
    [NSColor yellowColor],
    [NSColor cyanColor],
    [NSColor magentaColor],
    [NSColor greenColor],
    [NSColor purpleColor],
    [NSColor orangeColor],
    [NSColor blueColor],
  ];
  return colors[layer % colors.count];
}

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.

                                                                              {
  // Adjust sublayer count to paintRegion count.
  while (layer.sublayers.count > paintRegion.size()) {
    [layer.sublayers.lastObject removeFromSuperlayer];
  }
 
  while (layer.sublayers.count < paintRegion.size()) {
    CALayer* newLayer = [CALayer layer];
    [layer addSublayer:newLayer];
  }
 
  for (size_t i = 0; i < paintRegion.size(); i++) {
    CALayer* subLayer = [layer.sublayers objectAtIndex:i];
    const auto& rect = paintRegion[i];
    subLayer.frame = CGRectMake(rect.left / scale, rect.top / scale,
                                (rect.right - rect.left) / scale, (rect.bottom - rect.top) / scale);
 
    double width = surfaceSize.width;
    double height = surfaceSize.height;
 
    subLayer.contentsRect =
        CGRectMake(rect.left / width, rect.top / height, (rect.right - rect.left) / width,
                   (rect.bottom - rect.top) / height);
 
    if (borderColor != nil) {
      // Visualize sublayer
      subLayer.borderColor = borderColor.CGColor;
      subLayer.borderWidth = 1.0;
    }
 
    subLayer.contents = (__bridge id)surface;
  }
}

Variable Documentation

kIdleDelay

const double kIdleDelay = 1.0

static

Definition at line 268 of file FlutterSurfaceManager.mm.

kSurfaceEvictionAge

const int kSurfaceEvictionAge = 30

static

Definition at line 273 of file FlutterSurfaceManager.mm.