https://bugs.kde.org/show_bug.cgi?id=399820
Bug ID: 399820
Summary: Implement Metal support as OpenGL is deprecated on OS
X
Product: krita
Version: 4.1.5
Platform: Mac OS X Disk Images
OS: OS X
Status: REPORTED
Severity: normal
Priority: NOR
Component: General
Assignee: krita-bugs-n...@kde.org
Reporter: afonsec...@gmail.com
Target Milestone: ---
SUMMARY
Apple has deprecated OpenGL support for the Mac OS X platform and the API is no
longer supported. Although still functional, it may cease to be included in
future releases of the operating system. This bug is to report this change and
advise implementation of the Metal API for continued support of Krita on the OS
X platform.
Please refer to Apple's note in the OpenGL programming guide:
"Important OpenGL was deprecated in macOS 10.14. To create high-performance
code on GPUs, use the Metal framework instead."
https://developer.apple.com/library/archive/documentation/GraphicsImaging/Conceptual/OpenGL-MacProgGuide/opengl_intro/opengl_intro.html
They refer developers to use the Metal API referenced here:
https://developer.apple.com/metal/
Additional information regarding Apple's deprecation warning:
"Deprecations
Periodically, Apple adds deprecation macros to APIs to indicate that those APIs
should no longer be used in active development. When a deprecation occurs, it’s
not an immediate end of life for the specified API. Instead, it is the
beginning of a grace period for transitioning from that API and to newer and
more modern replacements. Deprecated APIs typically remain present and usable
in the system for a reasonable time past the release in which they were
deprecated. However, active development on them ceases, and the APIs receive
only minor changes to accommodate security patches or to fix other critical
bugs. Deprecated APIs may be removed entirely from a future version of the
operating system.
As a developer, avoid using deprecated APIs in your code as soon as possible.
At a minimum, new code you write should never use deprecated APIs. And if your
existing code uses deprecated APIs, update that code as soon as possible."
Reference: https://developer.apple.com/macos/whats-new/
STEPS TO REPRODUCE
1. Open Krita
2. Go to menu Krita->Preferences->Display
OBSERVED RESULT
Observe Canvas Graphics Acceleration option Renderer lists OpenGL and Metal is
not an option.
EXPECTED RESULT
Metal is an available graphics acceleration renderer option
SOFTWARE VERSIONS
Krita
Version: 4.1.5
Qt
Version (compiled): 5.11.1
Version (loaded): 5.11.1
OS Information
Build ABI: x86_64-little_endian-lp64
Build CPU: x86_64
CPU: x86_64
Kernel Type: darwin
Kernel Version: 18.0.0
Pretty Productname: macOS 10.14
Product Type: osx
Product Version: 10.14
OpenGL Info
**OpenGL not initialized**
ADDITIONAL INFORMATION
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