add CanvasRenderingContext2D.antialias

[matt1581813]

add property antialias for CanvasRenderingContext2D;
can use context.antialias = 'none'; to disable antialias
antialias img

disable antialias

[samizdatco]

Thanks for all your work on this (nice job making the setting configurable btw)!

I can't quite tell from the demonstration images how this differs from setting imageSmoothingEnabled to false. Could you try testing that as a comparison?

[matt1581813]

use imageSmoothingEnabled = false

use antialias = 'none'

[matt1581813]

you can try this demo

testCode.zip

[samizdatco]

Oh, I think I misunderstood before. Is the goal with this patch to remove those faint triangular line artifacts? I've never seen those in my testing.

Could you provide me with some code that triggers that bug (the zip file you posted above seems to only contain the file ceramicRoof_1.jpg)? It would also be helpful if you could tell me:

1. The OS you're using
2. The version of skia-canvas
3. Whether canvas.gpu is true or false

[matt1581813]

sorry ,that zip miss the test code, i upload a new one
os: windows 10
skia-canvas version: 0.9.31
canvas.gpu : false

testCode.zip