USE WebGL if possible ?

[darkyen]

I think it should be possible to create a shim to run the filters in WebGL if supported and falling back to canvas. The direct advantage will be insanely boosted performance.

[meltingice]

I've thought about this a lot. Unfortunately my WebGL skills are pretty limited. Not sure how you would provide 100% compatibility with the current filters. A canvas can't be both a WebGL canvas and a 2d canvas as far as I know.— Ryan LeFevre (@meltingice) LayerVault Software Engineer

On Fri, Jul 18, 2014 at 7:54 AM, Abhishek Hingnikar notifications@github.com wrote:

I think it should be possible to create a shim to run the filters in WebGL if supported and falling back to canvas. The direct advantage will be insanely boosted performance.

Reply to this email directly or view it on GitHub: https://github.com/meltingice/CamanJS/issues/149

[darkyen]

There exists seriously.js - http://seriouslyjs.org/ its free and open source, The documentation is in stone age but the project is pretty robust and code is well written +1, maybe write a shim with seriously.js ? PS Seriously is lower level compared to canman

[fesor]

There is no big problems with rewriting all filters to GLSL and use as another driver with Canvas fallback.

[fesor]

Also there is glfx.

[fesor]

Just checked, glfx already have implementation for some of the filters:

• brightness
• contrast
• noise
• sepia
• vibrance
• vignette
• exposure
• curves (need to check interpolation function)
• gamma
• hue
• saturation
• invert

What is missed here:

• greyscale
• channels
• sharpen
• posterize
• clip
• colorize
• fillColor
• clip
• stackBlur

It's not so complicated to implement this filters. Some of them already implemented in other libraries (for example, sharpen filter)

Also blending modes should be implemented as fragment shaders. There is example: http://www.nutty.ca/articles/blend_modes/