| Name |
| |
| MESA_texture_const_bandwidth |
| |
| Name Strings |
| |
| GL_MESA_texture_const_bandwidth |
| |
| Contact |
| |
| Rob Clark <robdclark@chromium.org> |
| |
| Contributors |
| |
| Rob Clark, Google |
| Lina Versace, Google |
| Tapani Pälli, Intel |
| |
| Status |
| |
| Proposal |
| |
| Version |
| |
| Version 1, September, 2023 |
| |
| Number |
| |
| OpenGL Extension 560 |
| OpenGL ES Extension 347 |
| |
| Dependencies |
| |
| Requires EXT_memory_object. |
| |
| Overview |
| |
| The use of data dependent bandwidth compressed formats (UBWC, AFBC, etc) |
| can introduce a form of side-channel, in that the bandwidth used for |
| texture access is dependent on the texture's contents. In some cases |
| an application may want to disable the use of data dependent formats on |
| specific textures. |
| |
| For that purpose, this extension extends EXT_memory_object to introduce |
| a new <param> CONST_BW_TILING_MESA. |
| |
| IP Status |
| |
| None |
| |
| Issues |
| |
| None |
| |
| New Procedures and Functions |
| |
| None |
| |
| New Types |
| |
| None |
| |
| New Tokens |
| |
| Returned in the <params> parameter of GetInternalFormativ or |
| GetInternalFormati64v when the <pname> parameter is TILING_TYPES_EXT, |
| returned in the <params> parameter of GetTexParameter{if}v, |
| GetTexParameterI{i ui}v, GetTextureParameter{if}v, and |
| GetTextureParameterI{i ui}v when the <pname> parameter is |
| TEXTURE_TILING_EXT, and accepted by the <params> parameter of |
| TexParameter{ifx}{v}, TexParameterI{i ui}v, TextureParameter{if}{v}, |
| TextureParameterI{i ui}v when the <pname> parameter is |
| TEXTURE_TILING_EXT: |
| |
| CONST_BW_TILING_MESA 0x8BBE |
| |
| Errors |
| |
| None |
| |
| Revision History |
| |
| Version 1, 2023-9-28 (Rob Clark) |
| Initial draft. |
