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cogl: Don't allow creating sized textures with 0 pixels

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A texture with no pixels isn't a useful thing to have, and breaks
assumptions elsewhere. For example, CoglFramebuffer assumes that after
a texture has been allocated, it will have width and height both greater
than 0.

In particular, this works around a crash when gnome-shell tries to blur a
background that hasn't yet had any space allocated for it - which it seems
is really an actor layout bug, but more robustness seems good to have.

Workaround for <https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2538>.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1172

Signed-off-by: Simon McVittie <smcv@debian.org>

(cherry picked from commit 37eda498f2)
This commit is contained in:
Simon McVittie 2020-04-02 19:30:14 +01:00 committed by Robert Mader
parent 6f094bd399
commit e3b2b90c72
1 changed files with 3 additions and 0 deletions
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3
cogl/cogl/cogl-texture-2d.c
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@ -121,6 +121,9 @@ cogl_texture_2d_new_with_size (CoglContext *ctx,
{
CoglTextureLoader *loader;
g_return_val_if_fail (width >= 1, NULL);
g_return_val_if_fail (height >= 1, NULL);
loader = _cogl_texture_create_loader ();
loader->src_type = COGL_TEXTURE_SOURCE_TYPE_SIZED;
loader->src.sized.width = width;