meson build and libdrm/minigbm integration #1
Description
Hi gentleman,
I know it might be crazy to voice this out. Here is the reason.
Few nitches on real world AOSP custom rom:
- Very cumbersome to build Mesa gbm with meson for cross compile out-of-tree, pkgconfig related etc.
- Really out of support for those dedicate hardware backend from user point of view
- Wanted to use AOSP/LineageOS rom with both mainline/vendor kernel but not able to build a custom ROM.
Some bright things:
- Great support from minigbm
- Compatible between gbm and minigbm api, and subsitude possible.
- Many more format and/or modifier support from minigbm
- Very simple layering for aidl and stable-c gralloc/mapper for compile.
Yet to have:
- Minigbm and gralloc_gbm_mesa both not yet support meson
- Might have some extensive format/modifier support from minigbm with simply add to existing format modifier switch code.
- Possible code license issue to link gralloc_mesa_gbm with libdrm and minigbm altogether, yet to clear this out.
- Eventually mapper5 stable-c will be independent of aidl and entire framework in future.
To tackle above, I had written a draft version of meson build for both gralloc_mesa_gbm and minigbm, wrap file for libdrm and minigbm.
Now with goodies:
- A new meson build system to both minigbm and gralloc_mesa_gbm
- Compile/cross-build fine on gralloc_mesa_gbm with subproject of minigbm and libdrm, as a single so lib, ready for fast test with OS
- out-of-tree build for aidl; stable-c mapper module is the next item.
- Compile pass for stable-c mapper5 within minigbm, should be relatively easy to get it done with gralloc_mesa_gbm's
- Independent of bulky soong build system
Not as good as we expected:
- Stucked with vndk v34 and stable-c mapper_v5 api
I have doubt on below:
- Above said license problem between minigbm/libdrm/gralloc_mesa_gbm link altogether.
- Redistribute of binary code for license compilance.
- Dont know if I collect source files from aosp (vndk) and distribute with gralloc_mesa_gbm, might or not violate license.
- Test bed is still under gone setup. No result to prove anything atm.
- The license of gralloc_mesa_gbm in my side is unclear.
I hope
- Would you add a license file to the project?
- Benefit for people long waiting for oot cross build.
- Can have more use case for the project
- Can have a better support for extened formats modifiers, easily by replacing minigbm.
- Interoperatibility of Mesa Vulkan turnip, angle, gralloc_mesa_gbm, minigbm thus graphic full stack.
I also find Mesa vulkan turnip loaded but not yet fonctioning atm, If you wanna to have a try for other hardware device, below is a github repo action for fork and modify:
Changes are being released in below repo:
https://github.com/99degree/minigbm/
https://github.com/99degree/gralloc_gbm_mesa/
https://github.com/99degree/android-mesa-build/actions/
Please feel free to let me know if you have concern/interested about this. Once I know of any, and will take approprate action to compliant with license on all above said projects. Thanks for your great gralloc/mapper code.
Regards,
George