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Add ETC support to mipgen / imageio / suzanne.

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This shrinks file size as follows, although it seems to darken the
rendered result.

```
  1398209 Oct  2 16:22 ao.ktx
   699172 Oct  2 16:20 ao_etc.ktx
  1398209 Oct  2 16:22 metallic.ktx
   699172 Oct  2 16:19 metallic_etc.ktx
  1398209 Oct  2 16:22 roughness.ktx
   699172 Oct  2 16:20 roughness_etc.ktx
```
This commit is contained in:
Philip Rideout
2018-10-02 11:32:09 -07:00
parent 2eeb92fc4c
commit cc61e4649b
9 changed files with 236 additions and 45 deletions
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10
samples/web/filaweb.cpp
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@@ -348,6 +348,16 @@ T toFilamentEnum(uint32_t format) {
case KtxBundle::SRGB8_ALPHA8_ASTC_10x10: return T::SRGB8_ALPHA8_ASTC_10x10;
case KtxBundle::SRGB8_ALPHA8_ASTC_12x10: return T::SRGB8_ALPHA8_ASTC_12x10;
case KtxBundle::SRGB8_ALPHA8_ASTC_12x12: return T::SRGB8_ALPHA8_ASTC_12x12;
case KtxBundle::R11_EAC: return T::EAC_R11;
case KtxBundle::SIGNED_R11_EAC: return T::EAC_R11_SIGNED;
case KtxBundle::RG11_EAC: return T::EAC_RG11;
case KtxBundle::SIGNED_RG11_EAC: return T::EAC_RG11_SIGNED;
case KtxBundle::RGB8_ETC2: return T::ETC2_RGB8;
case KtxBundle::SRGB8_ETC2: return T::ETC2_SRGB8;
case KtxBundle::RGB8_ALPHA1_ETC2: return T::ETC2_RGB8_A1;
case KtxBundle::SRGB8_ALPHA1_ETC: return T::ETC2_SRGB8_A1;
case KtxBundle::RGBA8_ETC2_EAC: return T::ETC2_EAC_RGBA8;
case KtxBundle::SRGB8_ALPHA8_ETC2_EAC: return T::ETC2_EAC_SRGBA8;
}
return (T) 0xffff;
}