[TODO] Support wide color

[syoyo]

Wide color(wide gamut) support involves various things.

TinyUSDZ tries to support...

Asset(Texture) load

• sRGB DisplayP3 texture
• Linear DidplayP3 texture
• OpenEXR texture(through TinyEXR)
• DNG/TIFF Texture(through TinyDNG)
• Texture with OCIO LUT profile?

color space conversion

TinyUSDZ will provide at least linear-sRGB <-> linear-DisplayP3 conversion.

Scene color space

Where shading/lighting occurs

• Linear sRGB (trationally known as linear color space)
• Linear DisplayP3
• ACEScg(AP1)

Display(output)

This involves a viewer/renderer

• Android Vulkan wide gamut surface(DCI-P65, DisplayP3) https://developer.android.com/training/wide-color-gamut
  • Add colorMode to AndroidManifest.xml in TinyUSDZ's Android example
  • Create DCI-P65 or Display-P3 surface/swapchain
• webgpu external texture DisplayP3

Hardware

Wide-gamut supported display

• Recent iOS/Android device supports wide-gamut. Android chrome supports wide-gamut canvas display)