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render/egl: set EGL_IMAGE_PRESERVED_KHR

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Without setting this the EGL implementation is allowed to perform
destructive actions on the buffer when imported: its contents
become undefined.

This is mostly a pedantic change, because Mesa processes the attrib
and does absolutely nothing with it.
This commit is contained in:
Simon Ser 2021-07-23 17:22:04 +02:00 • committed by Simon Zeni
parent 04d4fb536d
commit ace2eda073
1 changed files with 5 additions and 0 deletions
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5
render/egl.c
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@ -525,6 +525,11 @@ EGLImageKHR wlr_egl_create_image_from_dmabuf(struct wlr_egl *egl,
attribs[atti++] = attributes->modifier >> 32; attribs[atti++] = attributes->modifier >> 32;
} }
} }
// Our clients don't expect our usage to trash the buffer contents
attribs[atti++] = EGL_IMAGE_PRESERVED_KHR;
attribs[atti++] = EGL_TRUE;
attribs[atti++] = EGL_NONE; attribs[atti++] = EGL_NONE;
assert(atti < sizeof(attribs)/sizeof(attribs[0])); assert(atti < sizeof(attribs)/sizeof(attribs[0]));