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an animation layer engine on windows platform some like Core Animation in cocoa frameworks.

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newest

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photo below is shown for wall-behive.

PicInCN

ChangeLog

changelog

classes

NSObject

CALayer

CARootLayer (2021)

CATextLayer

CAAnimation

CGContext

NSAutoReleasePool

NSDispatcher (2021)

__strong

__weak

__autoreleasing

CGAffineTransform

use animation engine

1. attach a CARootLayer to win32 window handle
2. addSublayer() CALayer to this CARootLayer
3. display() this CARootLayer in the win32 window's WM_PAINT wndproc.
4. setFrame() while this win32 window's WM_SIZE etc.

two way to write animations

1. use CAAnimation to commit() a animation job.

2. implement your own CALayer, override the virtual method CALayer::applyAnimating() to control every frame.

properties of CALayer for animation

1. Frame.

2. opacity.

3. transform matrix.

custom draw CALayer

1. derived Layer from CALayer
2. override the virtual method CALayer::drawInContext()

autorelease

1. NSAutoreleasePoolAttachCurrentThread() before any _0_autorelease in the thread.

2. scope between _0_autorelease and _1_autorelease

3. NSObjects can use autorelease() method.

4. NSAutoreleasePoolDettachCurrentThread() after any _1_autorelease in the thread.

lifetime

1. all the NSObjects only allowed to be created by NSObject::allocT<Ty>(), any new or scoped creation would throw.
2. release() by hand, or autorelease()
3. use __strong<Ty>, it retain() when the pointer checks in and release() when the pointer checks out.

dispatch_queue

1. implement as NSDispatcher which associate to HWND, and dispatch_async() to UI thread which the HWND belongs to.
2. this NSDispatcher help you change CALayer in UI thread rather than a non UI thread.
3. you should process process_dispatch_on_message() in the HWND's WM_NS_DIPATCH_NOTIRY wndporc.

performance

CGContextPolicy

1. CGContextPolicyForceSpeed()
2. CGContextPolicyPreferSpeed()
3. CGContextPolicyDefault()
4. CGContextPolicyBalance()

projects

https://github.com/bbqz007/KTL

other associated demo

if you are behive a wall, click here

https://github.com/bbqz007/stock-drawing-assistant-tool