Skip to main content

Amber Platform Support

Amber Platform Support

The new platform - Amber - is strongly related to the new supported API - OpenGLES1.1. OpenGLES1.1 provides less features than OpenGLES3.0. The most important missing feature is the programmable pipeline - (Shader configurations). On Amber platform, one cannot create shaders. However, the platform is simulated over OpenGLES3.0 so there are some pre-defined shaders that emulate the specific 1.1 functionality.

In order to accommodate SceneComposer to Amber platform, several changes were done/are currently under development (Mantis 5393):

Shaders:

  • Following Shader (substitutes) shall be exposed: Default Shader; BRDF Lighting Shader; Emission Texture Shader; Gradation Texture Shader.
  • ShaderParamSetters (UniformSetters) remain and are required to set parameters of special effects, like BRDF.
  • Shader Editor shall be read only. This allows at least to introspect usage of the effect parameters.
  • Disallow creation and import of new shaders.
  • Target Shader Compiler replaces effects with binary identifier in asset.

Textures:

  • Amber supports two default or three BRDF textures
  • SceneComposer shall allow three textures in general and throw warning if three textures are used with any other shader than BRDF
  • If two default textures are used, internally the default blend mode is applied [Alpha blending with src*(srcAlpha) + dst*(1-srcAlpha)]
  • No option to set (other) blend mode for multi-texturing.
  • Tangients in VertexBuffer required for BRDF textures can be generated by SceneComposer

Render Mode:

  • Alpha Blend Values are ignored, BackStencil function and operation are ignored.

Candera Objects in Toolbox to remove:

  • Morphing Mesh, Stereo Camera, SkyBox, Cube Map, Point Sprite.

Render Targets:

  • Remove Conformant Property (EGL Conformance)

Lights:

  • 8 Lights are supported. Range property is ignored. All light types supported.

Info - in simulation, Amber P renders objects without effects (default shader is associated) with OpenGL 1.1 API without shaders. SC Gizmos plus objects with special effects are rendered with OpenGL 2.0 via RenderDevice Extension.

Back to top