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Revert "renderer-native: Actually use shadow fb when using software rendering"

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It was not the lack of forcing the shadow fb that caused slowness, but
rather due to the method the shadow fb content was copied onto the
scanout fb. With 'clutter: Use cogl_blit_framebuffer() for shadow FB'
we'll use a path that shouldn't be slow when copying onto the scanout
fb.

Also 437f6b3d59 accidentally enabled
shadow fb when using hw accelerated contexts, due to the cap being set
to 1 in majority of drivers. While the kernel documentation for the
related field says "hint to userspace to prefer shadow-fb rendering",
the name of the hint when exposed to userspace is
DRM_CAP_DUMB_PREFER_SHADOW, thus should only be taken into consideration
for dumb buffers, not rendering in general.

This reverts commit 437f6b3d59.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/818
This commit is contained in:
Jonas Ådahl 2019-09-30 11:21:36 +02:00
parent 0f51ae7cf0
commit 7049b2f274
1 changed files with 2 additions and 2 deletions
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4
src/backends/native/meta-renderer-native.c
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@ -3213,11 +3213,11 @@ should_force_shadow_fb (MetaRendererNative *renderer_native,
case COGL_GPU_INFO_ARCHITECTURE_SANDYBRIDGE:
case COGL_GPU_INFO_ARCHITECTURE_SGX:
case COGL_GPU_INFO_ARCHITECTURE_MALI:
break;
return FALSE;
case COGL_GPU_INFO_ARCHITECTURE_LLVMPIPE:
case COGL_GPU_INFO_ARCHITECTURE_SOFTPIPE:
case COGL_GPU_INFO_ARCHITECTURE_SWRAST:
return TRUE;
break;
}
kms_fd = meta_gpu_kms_get_fd (primary_gpu);