| Name |
| |
| GLX_ARB_robustness_isolation |
| |
| Name Strings |
| |
| GLX_ARB_robustness_application_isolation |
| GLX_ARB_robustness_share_group_isolation |
| |
| Contributors |
| |
| Tim Johansson, Opera (timj 'at' opera.com) |
| Bill Licea-Kane (bill.licea-kane 'at' amd.com) |
| <TBD> |
| |
| Contact |
| |
| Kenneth Russell, Google (kbr 'at' google.com) |
| |
| Notice |
| |
| Copyright (c) 2012-2013 The Khronos Group Inc. Copyright terms at |
| http://www.khronos.org/registry/speccopyright.html |
| |
| Specification Update Policy |
| |
| Khronos-approved extension specifications are updated in response to |
| issues and bugs prioritized by the Khronos OpenGL Working Group. For |
| extensions which have been promoted to a core Specification, fixes will |
| first appear in the latest version of that core Specification, and will |
| eventually be backported to the extension document. This policy is |
| described in more detail at |
| https://www.khronos.org/registry/OpenGL/docs/update_policy.php |
| |
| Status |
| |
| Complete. |
| Approved by the ARB on 2012/06/12. |
| |
| Version |
| |
| Last Modified Date: August 13, 2012 |
| Version: 6 |
| |
| Number |
| |
| ARB Extension #142 |
| |
| Dependencies |
| |
| GLX 1.4 is required. |
| |
| GLX_ARB_create_context_robustness is required. |
| |
| Overview |
| |
| GL_ARB_robustness and GLX_ARB_create_context_robustness allow |
| creating an OpenGL context supporting graphics reset notification |
| behavior. GLX_ARB_robustness_application_isolation and |
| GLX_ARB_robustness_share_group_isolation provide stronger |
| guarantees about the possible side-effects of a graphics reset. |
| |
| IP Status |
| |
| No known IP claims. |
| |
| New Procedures and Functions |
| |
| None. |
| |
| New Types |
| |
| None. |
| |
| New Tokens |
| |
| Accepted as a bit in the attribute value for GLX_CONTEXT_FLAGS_ARB |
| in the <*attrib_list> argument to glXCreateContextAttribsARB: |
| |
| GLX_CONTEXT_RESET_ISOLATION_BIT_ARB 0x00000008 |
| |
| Additions to the OpenGL / AGL / WGL Specifications |
| |
| None. This specification is written for GLX. |
| |
| Additions to the GLX specification |
| |
| Add the following new paragraphs to the description of |
| glXCreateContextAttribsARB, after that added by |
| GLX_ARB_create_context_robustness: |
| |
| "If the application creates all of its OpenGL contexts with the |
| GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB attribute set to |
| GLX_LOSE_CONTEXT_ON_RESET_ARB, and the |
| GLX_CONTEXT_RESET_ISOLATION_BIT_ARB bit set, then: |
| |
| If the graphics driver advertises the |
| GLX_ARB_robustness_application_isolation extension string, then |
| the driver guarantees that if a particular application causes a |
| graphics reset to occur: |
| |
| 1. No other application on the system is affected by the |
| graphics reset. |
| |
| 2. No other application on the system receives any notification |
| that the graphics reset occurred. |
| |
| If the graphics driver advertises the |
| GLX_ARB_robustness_share_group_isolation extension string, then |
| the driver guarantees that if a context in a particular share |
| group causes a graphics reset to occur: |
| |
| 1. No other share group within the application, nor any other |
| application on the system, is affected by the graphics reset. |
| |
| 2. No other share group within the application, nor any other |
| application on the system, receives any notification that the |
| graphics reset occurred. |
| |
| The GLX_ARB_robustness_application_isolation and |
| GLX_ARB_robustness_share_group_isolation extensions do not provide |
| guarantees for graphics resets caused by applications which did |
| not create their contexts with both the LOSE_CONTEXT_ON_RESET_ARB |
| reset notification strategy and the |
| GLX_CONTEXT_RESET_ISOLATION_BIT_ARB bit." |
| |
| Add a new context creation error to glXCreateContextAttribsARB: |
| |
| "* If the reset isolation bits of <share_context> and the newly |
| created context are different, BadMatch is generated." |
| |
| GLX Errors |
| |
| None |
| |
| GLX Protocol |
| |
| None |
| |
| Errors |
| |
| GLXBadFBConfig is generated if GLX_CONTEXT_RESET_ISOLATION_BIT_ARB |
| is set in attribute GLX_CONTEXT_FLAGS_ARB, and no GL context |
| supporting the GL_ARB_robustness_isolation extension with either |
| application or share group isolation can be created. |
| |
| BadMatch is generated if the reset isolation bit of |
| <share_context> does not match the reset isolation bit of the |
| context being created. |
| |
| New State |
| |
| None |
| |
| New Implementation Dependent State |
| |
| None |
| |
| Conformance Tests |
| |
| TBD |
| |
| Sample Code |
| |
| TBD |
| |
| Issues |
| |
| 1) Do GPU vendors all agree that the share_group_isolation variant |
| is supportable? If so, we could drop the application_isolation |
| variant, which would simplify the spec. |
| |
| 2) How will these extension strings be handled and exposed on EGL |
| and Mac OS? |
| |
| Revision History |
| |
| Rev. Date Author Changes |
| ---- ------------ --------- ---------------------------------------- |
| 1 18 Apr 2011 kbr Initial version |
| 2 28 Apr 2011 kbr Renamed context_isolation to share_group_isolation |
| 3 08 Jun 2011 kbr Made guarantees conditional on using LOSE_CONTEXT_ON_RESET_ARB |
| 4 17 Aug 2011 kbr Renamed file to GLX_ARB_robustness_isolation |
| 5 24 Apr 2012 kbr Added GLX_CONTEXT_RESET_ISOLATION_BIT_ARB on feedback from Bill Licea-Kane |
| 6 08 Aug 2012 Jon Leech Renumbered from #145 to #142 |