https://en.wikipedia.org/wiki/Ericsson_Texture_Compression
ETC2 and EAC[edit]
The 'ETC2' scheme expands ETC1 in a backwards-compatible way to provide higher quality RGB compression[6] as well as compression of RGBA data (RGB plus alpha).
The following ETC2 codecs are mandatory in OpenGL ES 3.0[7] and OpenGL 4.3:[8]
GL_COMPRESSED_RGB8_ETC2— Compresses RGB888 data, the followup of ETC1.GL_COMPRESSED_RGBA8_ETC2_EAC— Compresses RGBA8888 data with full alpha support.GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2— Compresses RGBA data where pixels are either fully transparent or fully opaque.
sRGB variants of the above codecs are also available.
Backwards compatible (CONT.)
› ETC1 and ETC2 textures share a lot of blocks
› It is possible to store an ETC1 textures (for legacy devices) and ETC2 textures
(for OpenGL ES 3.0 devices) in a single file.
...헐? 한 파일에 ETC2 파일과 1파일을 유지할 수 있다고?
ETC2 is backward compatible with ETC1: If you have an old ETC1 texture, you
can load it as an ETC2 texture and the hardware will decode it correctly
헉?? ETC2로 하면 ETC1에서 돌릴 수 있다고??
반응형
'유니티 엔진' 카테고리의 다른 글
| Making the Post Effect : Blur - 2 (Post Effect 만들기 기본 : 블러 만들기 2 ) (0) | 2015.12.24 |
|---|---|
| Vertex Lighting (0) | 2015.07.30 |
| 유니티5의 Occlusion은 어떻게 따로 연산되는가? (0) | 2015.06.29 |
| Custom Standard Shader에서 Occlusion Texture 사용할때 안 나타나는 문제 (0) | 2015.06.29 |
| 유니티5 실시간 GI 이상현상 연구 : Unity5 Realtime GI (1) | 2015.06.16 |
댓글