kc3-lang/angle/extensions/EGL_ANGLE_display_power_preference.txt

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• Hash : f422f21a
  Author :
  Date : 2021-11-09T18:42:15
  

  Reland "Metal: Reintroduce GPU power preference selection code."
  
  This reverts commit 67a8cf07a740c5ce3aafd2ad7fddd370451b3525.
  
  Reason for revert: Landed Chromium-side dependency:
  https://chromium-review.googlesource.com/c/chromium/src/+/3271170
  
  Original change's description:
  > Revert "Metal: Reintroduce GPU power preference selection code."
  >
  > This reverts commit 017161701b7dbf70a13f3c180a39e1fa45c27d9f.
  >
  > Reason for revert: Blocking roller, please re-land with the fix.
  >
  > Original change's description:
  > > Metal: Reintroduce GPU power preference selection code.
  > >
  > > This CL re-introduces the GPU power preference code to
  > > the metal backend. It also reworks EGLDisplay caching
  > > in the frontend to cache based on the native display
  > > as well as the power preference attribute.
  > > A new extension, EGL_ANGLE_display_power_preference is
  > > added based on EGL_ANGLE_power_preference. This extension
  > > is a client extension that allows selection of GPU on
  > > display creation, similar to how GPUs are selected on
  > > context creation in EGL_ANGLE_power_preference.
  > > This CL adds EGLDisplayPowerPreferenceTest and enables it on
  > > the metal backend.
  > >
  > > Bug: angleproject:6143
  > > Change-Id: I0a081dcd2e3f18ab365fdd3498ddcb6e2ba35212
  > > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3231986
  > > Reviewed-by: Kenneth Russell <kbr@chromium.org>
  > > Reviewed-by: Jamie Madill <jmadill@chromium.org>
  > > Reviewed-by: Gregg Tavares <gman@chromium.org>
  > > Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
  >
  > TBR=kbr@chromium.org,gman@chromium.org,jonahr@google.com,jmadill@chromium.org,angle-scoped@luci-project-accounts.iam.gserviceaccount.com
  >
  > Change-Id: I4f775bf7139253a87b033a30e0da2100b3c1bb02
  > No-Presubmit: true
  > No-Tree-Checks: true
  > No-Try: true
  > Bug: angleproject:6143
  > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3270749
  > Reviewed-by: Jamie Madill <jmadill@chromium.org>
  > Commit-Queue: Jamie Madill <jmadill@chromium.org>
  
  # Not skipping CQ checks because this is a reland.
  
  Bug: angleproject:6143
  Change-Id: Id9b0a5cbb76e4dea9e2f2da2b1c47a0587dfdaf5
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3270970
  Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
  Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
  

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• extensions/EGL_ANGLE_display_power_preference.txt

• Name
  
      ANGLE_display_power_preference
  
  Name Strings
  
      EGL_ANGLE_display_power_preference
  
  Contributors
  
      Kenneth Russell
      Jonah Ryan-Davis
  
  Contacts
  
      Kenneth Russell, Google Inc. (kbr 'at' google.com)
      Jonah Ryan-Davis, Google Inc. (jonahr 'at' google.com)
  
  Status
  
      Draft
  
  Version
  
      Version 1, Oct 20, 2021
  
  Number
  
      EGL Extension #??
  
  Extension Type
  
      EGL client extension
  
  Dependencies
  
      This extension is written against the wording of the EGL 1.4
      Specification.
  
  Overview
  
      This extension allows selection of the high- or low-power GPU on
      dual-GPU systems, specifically on macOS.
  
  New Types
  
      None
  
  New Tokens
  
      Accepted as an attribute name in the <attrib_list> argument to
      eglGetPlatformDisplayEXT:
  
          EGL_POWER_PREFERENCE_ANGLE  0x3482
  
      Accepted as an attribute value in the <attrib_list> argument to
      eglGetPlatformDisplayEXT:
  
          EGL_LOW_POWER_ANGLE         0x0001
          EGL_HIGH_POWER_ANGLE        0x0002
  
  Additions to the EGL 1.4 Specification
  
      Add the following to section 3.7.1 "Creating Rendering Contexts":
  
      EGL_POWER_PREFERENCE_ANGLE indicates whether the display should be
      created on the integrated (low-power) or discrete (high-power) GPU
      on dual-GPU systems. EGL_POWER_PREFERENCE_ANGLE is only a legal
      display creation attribute when the EGL_ANGLE_power_preference
      extension is advertised. The valid values for this attribute are
      EGL_LOW_POWER_ANGLE and EGL_HIGH_POWER_ANGLE. If this extension is
      advertised and this display creation attribute is not specified,
      the default value is EGL_LOW_POWER_ANGLE.
  
  Issues
  
      None yet.
  
  Revision History
  
      Rev.    Date         Author     Changes
      ----  -------------  ---------  ----------------------------------------
        1   Oct 20, 2021   jonahr     Extension based off
                                        EGL_ANGLE_power_preference
  

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