Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true

[coderextreme]

‘’’ Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true. See: x3dom-full.debug.js:21721 Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true. See: https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-will-read-frequently x3dom.Texture.uploadTextMipmap @ x3dom-full.debug.js:21721 x3dom-full.debug.js:21721 Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true. See: https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-will-read-frequently x3dom.Texture.uploadTextMipmap @ x3dom-full.debug.js:21721 x3dom-full.debug.js:21721 Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true. See: https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-will-read-frequently x3dom.Texture.uploadTextMipmap @ x3dom-full.debug.js:21721 x3dom-full.debug.js:21721 Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true. See: https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-will-read-frequently x3dom.Texture.uploadTextMipmap @ x3dom-full.debug.js:21721 x3dom-full.debug.js:21721 Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true. See: https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-will-read-frequently x3dom.Texture.uploadTextMipmap @ x3dom-full.debug.js:21721 x3dom-full.debug.js:21721 Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true. See: https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-will-read-frequently x3dom.Texture.uploadTextMipmap @ x3dom-full.debug.js:21721 x3dom-full.debug.js:21721 Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true. See: https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-will-read-frequently x3dom.Texture.uploadTextMipmap @ x3dom-full.debug.js:21721 x3dom-full.debug.js:21721 Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true. See: https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-will-read-frequently x3dom.Texture.uploadTextMipmap @ x3dom-full.debug.js:21721 x3dom-full.debug.js:21721 Canvas2D: Multiple readback operations using getImageData are faster with the willReadFrequently attribute set to true. See: https://html.spec.whatwg.org/multipage/canvas.html#concept-canvas-will-read-frequently ‘’’

[andreasplesch]

Thanks,

https://github.com/x3dom/x3dom/blob/434365a4bf0d52ddf1ee2d03c22d755bdbe64a5b/src/Texture.js#L875

seems the only place where getImageData is called, for setting up rendering Text. It is called rarely, eg. not every frame.

See https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/getContext#willreadfrequently

Sounds like it trades off memory vs. performance. Probably not applicable here.

[coderextreme]

Joe's animation panel (choice of animation in as Texts) is not showing up in x3dom. I'll ask him to provide a copy to x3dom github.

Thanks, Joe.

On Wed, Jul 12, 2023 at 3:28 PM Andreas Plesch @.***> wrote:

Thanks,

https://github.com/x3dom/x3dom/blob/434365a4bf0d52ddf1ee2d03c22d755bdbe64a5b/src/Texture.js#L875

seems the only place where getImageData is called, for setting up rendering Text. It is called rarely, eg. not every frame.

See https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/getContext#willreadfrequently

Sounds like it trades off memory vs. performance. Probably not applicable here.

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[coderextreme]

Here's a picture of what's happening: X3DOM above, X_ITE below (the middle one).

[image: image.png]

On Wed, Jul 12, 2023 at 4:06 PM John Carlson @.***> wrote:

Joe's animation panel (choice of animation in as Texts) is not showing up in x3dom. I'll ask him to provide a copy to x3dom github.

Thanks, Joe.

On Wed, Jul 12, 2023 at 3:28 PM Andreas Plesch @.***> wrote:

Thanks,

https://github.com/x3dom/x3dom/blob/434365a4bf0d52ddf1ee2d03c22d755bdbe64a5b/src/Texture.js#L875

seems the only place where getImageData is called, for setting up rendering Text. It is called rarely, eg. not every frame.

See https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/getContext#willreadfrequently

Sounds like it trades off memory vs. performance. Probably not applicable here.

— Reply to this email directly, view it on GitHub https://github.com/x3dom/x3dom/issues/1282#issuecomment-1633168498, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAFMJ5ZKH4JZ5E2PIAN6663XP4CFXANCNFSM6AAAAAA2HRQV7M . You are receiving this because you authored the thread.Message ID: @.***>

[andreasplesch]

Thanks. The picture did not make it.

https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Skin/BoxMan4AnimationPanelX3dom.xhtml

seems to work. Is the same panel ?

[coderextreme]

Yeah, works okay for me too. Look at the console in Chrome or Edge.

John

On Wed, Jul 12, 2023 at 6:33 PM Andreas Plesch @.***> wrote:

Thanks. The picture did make it.

https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Skin/BoxMan4AnimationPanelX3dom.xhtml

seems to work. Is the same panel ?

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[coderextreme]

What I mean with the picture is this example in X3DOM (on top) does not match the menu below in X_ITE (below). I will ask Joe if I can release the model.

John

On Wed, Jul 12, 2023 at 4:20 PM John Carlson @.***> wrote:

Here's a picture of what's happening: X3DOM above, X_ITE below (the middle one).

[image: image.png]

On Wed, Jul 12, 2023 at 4:06 PM John Carlson @.***> wrote:

Joe's animation panel (choice of animation in as Texts) is not showing up in x3dom. I'll ask him to provide a copy to x3dom github.

Thanks, Joe.

On Wed, Jul 12, 2023 at 3:28 PM Andreas Plesch @.***> wrote:

Thanks,

https://github.com/x3dom/x3dom/blob/434365a4bf0d52ddf1ee2d03c22d755bdbe64a5b/src/Texture.js#L875

seems the only place where getImageData is called, for setting up rendering Text. It is called rarely, eg. not every frame.

See https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/getContext#willreadfrequently

Sounds like it trades off memory vs. performance. Probably not applicable here.

— Reply to this email directly, view it on GitHub https://github.com/x3dom/x3dom/issues/1282#issuecomment-1633168498, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAFMJ5ZKH4JZ5E2PIAN6663XP4CFXANCNFSM6AAAAAA2HRQV7M . You are receiving this because you authored the thread.Message ID: @.***>

[andreasplesch]

The picture did not make it.

[coderextreme]

My understanding I’m still talking about the same picture I thought you said did make it? A typo?

On Thu, Jul 13, 2023 at 5:28 PM Andreas Plesch @.***> wrote:

The picture did not make it.

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[andreasplesch]

Yes, it was a typo.