Mesa (master): egl/android: Add some useful error messages

[Emil Velikov]

Module: Mesa
Branch: master
Commit: 565fa6b748e952098b2e69eff4be6ac15c204043
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=565fa6b748e952098b2e69eff4be6ac15c204043

Author: Tomasz Figa <tfiga at chromium.org>
Date:   Fri Jul 15 16:53:49 2016 +0900

egl/android: Add some useful error messages

It is much easier to debug issues when the application gives some
meaningful error messages. This patch adds few to the EGL Android
platform backend.

Signed-off-by: Tomasz Figa <tfiga at chromium.org>
Reviewed-by: Eric Anholt <eric at anholt.net>
Reviewed-by: Emil Velikov <emil.velikov at collabora.com>

---

 src/egl/drivers/dri2/platform_android.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/egl/drivers/dri2/platform_android.c b/src/egl/drivers/dri2/platform_android.c
index 302eb85..37616f9 100644
--- a/src/egl/drivers/dri2/platform_android.c
+++ b/src/egl/drivers/dri2/platform_android.c
@@ -353,8 +353,10 @@ update_buffers(struct dri2_egl_surface *dri2_surf)
       return 0;
 
    /* try to dequeue the next back buffer */
-   if (!dri2_surf->buffer && !droid_window_dequeue_buffer(dri2_surf))
+   if (!dri2_surf->buffer && !droid_window_dequeue_buffer(dri2_surf)) {
+      _eglLog(_EGL_WARNING, "Could not dequeue buffer from native window");
       return -1;
+   }
 
    /* free outdated buffers and update the surface size */
    if (dri2_surf->base.Width != dri2_surf->buffer->width ||
@@ -379,16 +381,21 @@ get_back_bo(struct dri2_egl_surface *dri2_surf)
       return -1;
 
    fd = get_native_buffer_fd(dri2_surf->buffer);
-   if (fd < 0)
+   if (fd < 0) {
+      _eglLog(_EGL_WARNING, "Could not get native buffer FD");
       return -1;
+   }
 
    fourcc = get_fourcc(get_format(dri2_surf->buffer->format));
 
    pitch = dri2_surf->buffer->stride *
       get_format_bpp(dri2_surf->buffer->format);
 
-   if (fourcc == -1 || pitch == 0)
+   if (fourcc == -1 || pitch == 0) {
+      _eglLog(_EGL_WARNING, "Invalid buffer fourcc(%x) or pitch(%d)",
+              fourcc, pitch);
       return -1;
+   }
 
    dri2_surf->dri_image =
       dri2_dpy->image->createImageFromFds(dri2_dpy->dri_screen,