[Mesa-dev] [PATCH 3/3] egl/android: Mark surface as lost when dequeueBuffer fails

[Chad Versace]

From: Chad Versace <chad at kiwitree.net>

This ensures that future calls to eglSwapBuffers and eglMakeCurrent emit
an error.

This patch is part of a series for fixing
android.hardware.camera2.cts.RobustnessTest#testAbandonRepeatingRequestSurface
on Chrome OS x86 devices.

Cc: Tomasz Figa <tfiga at chromium.org>
Cc: Nicolas Boichat <drinkcat at chromium.org>
Cc: Tapani Pälli <tapani.palli at intel.com>
---
 src/egl/drivers/dri2/platform_android.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/egl/drivers/dri2/platform_android.c b/src/egl/drivers/dri2/platform_android.c
index f45fcdf4ff..2450d9de47 100644
--- a/src/egl/drivers/dri2/platform_android.c
+++ b/src/egl/drivers/dri2/platform_android.c
@@ -431,12 +431,16 @@ droid_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 static int
 update_buffers(struct dri2_egl_surface *dri2_surf)
 {
+   if (dri2_surf->base.Lost)
+      return -1;
+
    if (dri2_surf->base.Type != EGL_WINDOW_BIT)
       return 0;
 
    /* try to dequeue the next back buffer */
    if (!dri2_surf->buffer && !droid_window_dequeue_buffer(dri2_surf)) {
       _eglLog(_EGL_WARNING, "Could not dequeue buffer from native window");
+      dri2_surf->base.Lost = true;
       return -1;
    }
 
@@ -628,6 +632,12 @@ droid_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 
    dri2_flush_drawable_for_swapbuffers(disp, draw);
 
+   /* dri2_surf->buffer can be null even when no error has occured. For
+    * example, if the user has called no GL rendering commands since the
+    * previous eglSwapBuffers, then the driver may have not triggered
+    * a callback to ANativeWindow::dequeueBuffer, in which case
+    * dri2_surf->buffer remains null.
+    */
    if (dri2_surf->buffer)
       droid_window_enqueue_buffer(disp, dri2_surf);
 
-- 
2.12.0