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render/egl: improve modifier support detection

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Support for EXT_image_dma_buf_import_modifiers doesn't necessarily
indicate support for modifiers. For instance, Mesa will advertise
EXT_image_dma_buf_import_modifiers for all drivers. This is a trick
to allow EGL clients to enumerate supported formats (something
EXT_image_dma_buf_import is missing). For more information, see [1].

Add a new wlr_egl.has_modifiers flag which indicates whether
modifiers are supported. It's set to true if any
eglQueryDmaBufModifiersEXT query returned a non-empty list.

Use that flag to figure out whether the buffer modifier should be
passed to the EGL implementation on import.

[1]: https://github.com/KhronosGroup/EGL-Registry/issues/142
This commit is contained in:
Simon Ser 2021-11-27 18:33:04 +01:00 • committed by Simon Zeni
parent de0bc78319
commit 1bf9676e87
2 changed files with 10 additions and 14 deletions
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1
include/wlr/render/egl.h
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@ -65,6 +65,7 @@ struct wlr_egl {
PFNEGLQUERYDEVICESEXTPROC eglQueryDevicesEXT;
} procs;
bool has_modifiers;
struct wlr_drm_format_set dmabuf_texture_formats;
struct wlr_drm_format_set dmabuf_render_formats;
};