800026 - Speed up Canvas putImageData() without filling gfxImageSurface with zeros

Status: RESOLVED FIXED

(Core :: Graphics: Canvas2D, defect)

Description

[Tetsuro Kato (tete)]

Attachment: Patch for putImageData rv1.0

Because GfxImageSurface are created with the argument value of aClear "true" in the following two functions, those gfxImageSurface are filled with zeros by memset.
nsCanvasRenderingContext2DAzure::PutImageData_explicit()
nsCanvasRenderingContext2D::PutImageData_explicit()

But we set a value to every pixel in the gfxImageSurface right after that, so filling the gfxImageSurface with zeros seems to be waste of CPU cycles.

Comment 1

[Jeff Muizelaar [:jrmuizel]]

Comment on attachment 670021 [details] [diff] [review]
Patch for putImageData rv1.0

Looks great to me.

Comment 2

[Ryan VanderMeulen [:RyanVM]]

I don't see any Try results here, so I've triggered a run. I'll push it if it's green.

https://tbpl.mozilla.org/?tree=Try&rev=b8bd135fa1a6

Thanks for the patch, Tete! One request - to make life easier for those checking in on your behalf, please make sure that your future patches follow the guidelines below. Thanks!
https://developer.mozilla.org/en-US/docs/Creating_a_patch_that_can_be_checked_in

Comment 3

[Tetsuro Kato (tete)]

Ryan, thank you for letting me know the document. I'll read it carefully so that I can create my patches according to the guidelines. Thank you!

Comment 4

[Ryan VanderMeulen [:RyanVM]]

Looks green. Thanks again!

https://hg.mozilla.org/integration/mozilla-inbound/rev/8766ced01b38

Comment 5

[Ed Morley [:emorley]]

https://hg.mozilla.org/mozilla-central/rev/8766ced01b38