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Add an experimental "no-copy" renderer (#741)

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* Add "ASGraphicsContext" to skip copying our rendered images

* Zero the buffer before making a context

* Update license header

* Update dangerfile

* Make it a runtime flag

* Restore GState for good measure

* Free buffer if end without image

* Enable the experiment, and cut out the middle-man

* Fix typo
This commit is contained in:
Adlai Holler
2018-01-13 19:19:08 -08:00
committed by GitHub
parent 3708f2e448
commit 1d105c2056
14 changed files with 272 additions and 44 deletions
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6
Source/Debug/AsyncDisplayKit+Debug.m
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@@ -17,6 +17,7 @@
#import <AsyncDisplayKit/AsyncDisplayKit+Debug.h>
#import <AsyncDisplayKit/ASAbstractLayoutController.h>
#import <AsyncDisplayKit/ASGraphicsContext.h>
#import <AsyncDisplayKit/ASLayout.h>
#import <AsyncDisplayKit/ASWeakSet.h>
#import <AsyncDisplayKit/UIImage+ASConvenience.h>
@@ -148,7 +149,7 @@ static BOOL __enableHitTestDebug = NO;
UIColor *clipsBorderColor = [UIColor colorWithRed:30/255.0 green:90/255.0 blue:50/255.0 alpha:0.7];
CGRect imgRect = CGRectMake(0, 0, 2.0 * borderWidth + 1.0, 2.0 * borderWidth + 1.0);
UIGraphicsBeginImageContext(imgRect.size);
ASGraphicsBeginImageContextWithOptions(imgRect.size, NO, 1);
[fillColor setFill];
UIRectFill(imgRect);
@@ -156,8 +157,7 @@ static BOOL __enableHitTestDebug = NO;
[self drawEdgeIfClippedWithEdges:clippedEdges color:clipsBorderColor borderWidth:borderWidth imgRect:imgRect];
[self drawEdgeIfClippedWithEdges:clipsToBoundsClippedEdges color:borderColor borderWidth:borderWidth imgRect:imgRect];
UIImage *debugHighlightImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImage *debugHighlightImage = ASGraphicsGetImageAndEndCurrentContext();
UIEdgeInsets edgeInsets = UIEdgeInsetsMake(borderWidth, borderWidth, borderWidth, borderWidth);
debugOverlay.image = [debugHighlightImage resizableImageWithCapInsets:edgeInsets resizingMode:UIImageResizingModeStretch];