dri: fromPlanar() can return NULL as a valid result

It was assumed that fromPlanar() could return NULL to mean
that the planar image is the same as the parent DRI image.
That assumption wasn't made everywhere though.

Let's fix things and make sure that all callers understand
a NULL result

Signed-off-by: Louis-Francis Ratté-Boulianne <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>
Reviewed-by: Daniel Stone <[email protected]>

2 files changed, 5 insertions, 7 deletions

diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c
index e9b556ec5f7..17b646e7ede 100644
--- a/src/egl/drivers/dri2/egl_dri2.c
+++ b/src/egl/drivers/dri2/egl_dri2.c
@@ -1966,7 +1966,8 @@ dri2_create_image_wayland_wl_buffer(_EGLDisplay *disp, _EGLContext *ctx,
    }
 
    dri_image = dri2_dpy->image->fromPlanar(buffer->driver_buffer, plane, NULL);
-
+   if (dri_image == NULL && plane == 0)
+      dri_image = dri2_dpy->image->dupImage(buffer->driver_buffer, NULL);
    if (dri_image == NULL) {
       _eglError(EGL_BAD_PARAMETER, "dri2_create_image_wayland_wl_buffer");
       return NULL;
diff --git a/src/egl/drivers/dri2/platform_wayland.c b/src/egl/drivers/dri2/platform_wayland.c
index f91baded877..5b8bec901b0 100644
--- a/src/egl/drivers/dri2/platform_wayland.c
+++ b/src/egl/drivers/dri2/platform_wayland.c
@@ -814,13 +814,10 @@ create_wl_buffer(struct dri2_egl_display *dri2_dpy,
          int stride, offset;
          int fd = -1;
 
-         if (i == 0)
-            p_image = image;
-         else
-            p_image = dri2_dpy->image->fromPlanar(image, i, NULL);
+         p_image = dri2_dpy->image->fromPlanar(image, i, NULL);
          if (!p_image) {
-            zwp_linux_buffer_params_v1_destroy(params);
-            return NULL;
+            assert(i == 0);
+            p_image = image;
          }
 
          query = dri2_dpy->image->queryImage(p_image,