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backend/drm: unset current surface before importing

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drm_fb_import_wlr may need to change the current EGL context. For
instance by calling drm_fb_clear, which calls wlr_buffer_unlock, which
may destroy a buffer if the cursor swapchain size has changed, which
calls gles2's destroy_buffer, which calls glDeleteFramebuffers.

Closes: https://github.com/swaywm/wlroots/issues/2479
This commit is contained in:
Simon Ser 2020-12-07 19:57:12 +01:00
parent c9760569ae
commit e69bbfd0d6
1 changed files with 7 additions and 4 deletions
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11
backend/drm/renderer.c
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@ -322,12 +322,15 @@ void drm_fb_clear(struct wlr_drm_fb *fb) {
bool drm_fb_lock_surface(struct wlr_drm_fb *fb, struct wlr_drm_surface *surf) {
assert(surf->back_buffer != NULL);
if (!drm_fb_import_wlr(fb, surf->renderer, surf->back_buffer, NULL)) {
return false;
}
struct wlr_buffer *buffer = wlr_buffer_lock(surf->back_buffer);
// Unset the current EGL context ASAP, because other operations may require
// making another context current.
drm_surface_unset_current(surf);
return true;
bool ok = drm_fb_import_wlr(fb, surf->renderer, buffer, NULL);
wlr_buffer_unlock(buffer);
return ok;
}
bool drm_fb_import_wlr(struct wlr_drm_fb *fb, struct wlr_drm_renderer *renderer,