Does stage3d use OpenGL? or Direct3D when on Windows

Question

WebGl is based on OpelGL ES 2.0. Is it correct to say that Stage3d is also based OpenGL? I mean does it call OpenGL functions? Or ot calles Direct3D when runs on Windows?

If no, could you explain me, what API does Stage3d use for hardware acceleration?

Answer 1

Good day, Stage3D isn't based on anything, it may share similar methodology/terminology. It is another rendering pipeline, this is why Adobe is soo pumped about it.

Have a look at this: http://www.adobe.com/devnet/flashplayer/articles/how-stage3d-works.html You can skip down to this heading "Comparing the advantages and restrictions of working with Stage3D" to get right down to it.

Also, take a peak at this: http://www.adobe.com/devnet/flashplayer/stage3d.html, excerpt:

The Stage3D APIs in Flash Player and Adobe AIR offer a fully hardware-accelerated architecture that brings stunning visuals across desktop browsers and iOS and Android apps enabling advanced 2D and 3D capabilities. This set of low-level GPU-accelerated APIs provide developers with the flexibility to leverage GPU hardware acceleration for significant performance gains in video game development, whether you’re using cutting-edge 3D game engines or the intuitive, lightning fast Starling 2D framework that powers Angry Birds.

Answer 2

The accepted answer is incorrect unfortunately. Stage 3D uses:

• DirectX on Windows systems
• OpenGL on OSX systems
• OpenGL ES on mobile
• Software Renderer when no hardware acceleration is available. (Due to older hardware or no hardware at all.)

Please see: http://www.slideshare.net/danielfreeman779/adobe-air-stage3d-and-agal