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From a964ccdadf351d90482df00c272dee3634f7a8ee Mon Sep 17 00:00:00 2001
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From: Olivier Fourdan <ofourdan@redhat.com>
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Date: Fri, 30 Apr 2021 09:02:29 +0200
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Subject: [PATCH xserver 18/27] xwayland/eglstream: Check eglSwapBuffers()
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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EGLstream's post_damage() would unconditionally return success
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regardless of the actual status of the eglSwapBuffers().
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Yet, if eglSwapBuffers() fails, we should not post the corresponding
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damage as they wouldn't match the actual content of the buffer.
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Use the eglSwapBuffers() return value as the return value for
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post_damage() and do not take a refrence on the pixmap if it fails.
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Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
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Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
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(cherry picked from commit b583395cd38ad101c7541bd8b0e91143ced44703)
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---
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hw/xwayland/xwayland-glamor-eglstream.c | 14 ++++++++++----
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1 file changed, 10 insertions(+), 4 deletions(-)
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diff --git a/hw/xwayland/xwayland-glamor-eglstream.c b/hw/xwayland/xwayland-glamor-eglstream.c
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index 3a3caa976..6721acfe8 100644
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--- a/hw/xwayland/xwayland-glamor-eglstream.c
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+++ b/hw/xwayland/xwayland-glamor-eglstream.c
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@@ -750,14 +750,20 @@ xwl_glamor_eglstream_post_damage(struct xwl_window *xwl_window,
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glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
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if (xwl_eglstream->have_egl_damage)
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- eglSwapBuffersWithDamageKHR(xwl_screen->egl_display,
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- xwl_pixmap->surface, egl_damage, 1);
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+ status = eglSwapBuffersWithDamageKHR(xwl_screen->egl_display,
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+ xwl_pixmap->surface,
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+ egl_damage, 1);
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else
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- eglSwapBuffers(xwl_screen->egl_display, xwl_pixmap->surface);
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+ status = eglSwapBuffers(xwl_screen->egl_display,
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+ xwl_pixmap->surface);
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+
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+ if (!status) {
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+ ErrorF("eglstream: buffer swap failed, not posting damage\n");
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+ goto out;
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+ }
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/* hang onto the pixmap until the compositor has released it */
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pixmap->refcnt++;
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- status = TRUE;
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out:
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/* Restore previous state */
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--
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2.31.1
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