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From 070abe64b15db831802a842aa1965403eb24679e Mon Sep 17 00:00:00 2001
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From: Olivier Fourdan <ofourdan@redhat.com>
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Date: Wed, 31 Mar 2021 09:49:35 +0200
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Subject: [PATCH xserver 10/27] xwayland/eglstream: Check framebuffer status
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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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The EGLStream backend would sometime generate GL errors trying to draw
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to the framebuffer, which gives an invalid buffer, which in turn would
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generate a Wayland error from the compositor which is fatal to the
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client.
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Check the framebuffer status and bail out early if it's not complete,
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to avoid getting into trouble later.
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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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https://gitlab.freedesktop.org/xorg/xserver/-/issues/1156
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(cherry picked from commit 85244d2a2081d61a2e4a06e847041f638de01e3f)
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---
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hw/xwayland/xwayland-glamor-eglstream.c | 18 ++++++++++++++----
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1 file changed, 14 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 f64d05064..64fe93b7c 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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@@ -619,6 +619,7 @@ xwl_glamor_eglstream_post_damage(struct xwl_window *xwl_window,
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box->x2 - box->x1, box->y2 - box->y1
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};
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GLint saved_vao;
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+ int status;
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if (xwl_pixmap->type != XWL_PIXMAP_EGLSTREAM)
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/* This can happen if a client does X11 rendering on a
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@@ -652,6 +653,13 @@ xwl_glamor_eglstream_post_damage(struct xwl_window *xwl_window,
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glUniform1i(xwl_eglstream->blit_is_rgba_pos,
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pixmap->drawable.depth >= 32);
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+ status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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+ if (status != GL_FRAMEBUFFER_COMPLETE) {
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+ ErrorF("eglstream: Framebuffer incomplete 0x%X, not posting damage\n", status);
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+ status = FALSE;
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+ goto out;
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+ }
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+
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/* Blit rendered image into EGLStream surface */
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glDrawBuffer(GL_BACK);
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glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
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@@ -662,14 +670,16 @@ xwl_glamor_eglstream_post_damage(struct xwl_window *xwl_window,
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else
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eglSwapBuffers(xwl_screen->egl_display, xwl_pixmap->surface);
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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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+
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+out:
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/* Restore previous state */
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glBindVertexArray(saved_vao);
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glBindTexture(GL_TEXTURE_2D, 0);
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- /* hang onto the pixmap until the compositor has released it */
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- pixmap->refcnt++;
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-
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- return TRUE;
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+ return status;
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}
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static Bool
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--
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2.31.1
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