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winsys-egl-kms: dont create 0x0 surface

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commit 188752158 changed cogl to stop needlessly creating its own
monitor output configuration when mutter would just soon overwrite
it anyway.

Unfortunately, that commit is causing a crash in some cases because
cogl will now create and later draw to a 0x0 egl surface until mutter
sets the monitor layout.

This commit changes cogl to avoid creating and using a surface, before
it knows how big of a surface to create.

https://bugzilla.gnome.org/show_bug.cgi?id=758073
This commit is contained in:
Ray Strode 2016-02-22 13:19:54 -05:00
parent 96d8be620a
commit 1c1ad69f26
1 changed files with 29 additions and 3 deletions
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32
cogl/winsys/cogl-winsys-egl-kms.c
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@ -909,7 +909,8 @@ _cogl_winsys_onscreen_swap_buffers_with_damage (CoglOnscreen *onscreen,
if (kms_onscreen->pending_surface)
{
free_current_bo (onscreen);
gbm_surface_destroy (kms_onscreen->surface);
if (kms_onscreen->surface)
gbm_surface_destroy (kms_onscreen->surface);
kms_onscreen->surface = kms_onscreen->pending_surface;
kms_onscreen->pending_surface = NULL;
}
@ -1030,6 +1031,15 @@ _cogl_winsys_onscreen_init (CoglOnscreen *onscreen,
kms_onscreen = g_slice_new0 (CoglOnscreenKMS);
egl_onscreen->platform = kms_onscreen;
/* If a kms_fd is set then the display width and height
* won't be available until cogl_kms_display_set_layout
* is called. In that case, defer creating the surface
* until then.
*/
if (kms_display->width == 0 ||
kms_display->height == 0)
return TRUE;
kms_onscreen->surface =
gbm_surface_create (kms_renderer->gbm,
kms_display->width,
@ -1265,8 +1275,24 @@ cogl_kms_display_set_layout (CoglDisplay *display,
if (kms_onscreen->pending_surface)
gbm_surface_destroy (kms_onscreen->pending_surface);
kms_onscreen->pending_surface = new_surface;
kms_onscreen->pending_egl_surface = new_egl_surface;
/* If there's already a surface, wait until the next swap to switch
* it out, otherwise, if we're just starting up we can use the new
* surface right away.
*/
if (kms_onscreen->surface != NULL)
{
kms_onscreen->pending_surface = new_surface;
kms_onscreen->pending_egl_surface = new_egl_surface;
}
else
{
CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (kms_display->onscreen);
kms_onscreen->surface = new_surface;
egl_onscreen->egl_surface = new_egl_surface;
_cogl_framebuffer_winsys_update_size (framebuffer, width, height);
}
}
kms_display->width = width;