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Update HapVideoDRAFT.md
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Add BC6U and BC6S texture formats
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@mbechard
mbechard committed Apr 29, 2022
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Expand Up @@ -24,6 +24,7 @@ The correct encoding and decoding of Hap frames depends on compression schemes d
3. Scaled YCoCg DXT5 Texture Compression: described in [Real-Time YCoCg-DXT Compression][3], JMP van Waveren and Ignacio Castaño, September 2007
4. BC7 Texture Compression: described in the [OpenGL BPTC Extension][4]
5. RGTC/BC4 Texture Compression: described in the [OpenGL RGTC Extension][5]
6. BC6U/BC6S Texture Compression: described in the [OpenGL BPTC Extension][4]

## Hap Frames

Expand Down Expand Up @@ -63,6 +64,12 @@ The following are the only section types permitted at the top level of a frame.
|0xA1 |Alpha |RGTC1/BC4 |None |
|0xB1 |Alpha |RGTC1/BC4 |Snappy |
|0xC1 |Alpha |RGTC1/BC4 |Consult decode instructions |
|0xA2 |RGB Unsigned Float|BC6U |None |
|0xB2 |RGB Unsigned Float|BC6U |Snappy |
|0xC2 |RGB Unsigned Float|BC6U |Consult decode instructions |
|0xA3 |RGB Signed Float|BC6S |None |
|0xB3 |RGB Signed Float|BC6S |Snappy |
|0xC3 |RGB Signed Float|BC6S |Consult decode instructions |
|0x0D |Multiple images |Not Applicable |Not Applicable |

#### Simple Top-Level Sections
Expand Down Expand Up @@ -132,6 +139,7 @@ Where Hap frames are present in a stream or container and identifiers are requir
|Scaled YCoCg DXT5/BC3 + Alpha RGTC1/BC4 |Hap Q Alpha |HapM |
|Alpha RGTC1/BC4 |Hap Alpha-Only |HapA |
|RGBA BPTC/BC7 UNORM |Hap R |Hap7 |
|RGB BPTC/BC6U and BC6S |Hap H |HapH |


[1]: http://www.opengl.org/registry/specs/EXT/texture_compression_s3tc.txt
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