gallium/screen: Add pipe_screen::resource_get_param

This function retrieves individual parameters selected by enum
pipe_resource_param. It can be used as a more direct alternative to
pipe_screen::resource_get_handle.

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Acked-by: Eric Anholt <eric@anholt.net>

2 files changed, 25 insertions, 0 deletions

diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 86cc9d80ac9f..0c79cac5cff1 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -1027,6 +1027,21 @@ enum pipe_compute_cap
 };
 
 /**
+ * Resource parameters. They can be queried using
+ * pipe_screen::get_resource_param.
+ */
+enum pipe_resource_param
+{
+   PIPE_RESOURCE_PARAM_NPLANES,
+   PIPE_RESOURCE_PARAM_STRIDE,
+   PIPE_RESOURCE_PARAM_OFFSET,
+   PIPE_RESOURCE_PARAM_MODIFIER,
+   PIPE_RESOURCE_PARAM_HANDLE_TYPE_SHARED,
+   PIPE_RESOURCE_PARAM_HANDLE_TYPE_KMS,
+   PIPE_RESOURCE_PARAM_HANDLE_TYPE_FD,
+};
+
+/**
  * Types of parameters for pipe_context::set_context_param.
  */
 enum pipe_context_param
diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index 9bd247722993..ac2087921d75 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -263,6 +263,16 @@ struct pipe_screen {
                                unsigned usage);
 
    /**
+    * Get info for the given pipe resource without the need to get a
+    * winsys_handle.
+    */
+   bool (*resource_get_param)(struct pipe_screen *screen,
+                              struct pipe_resource *resource,
+                              unsigned int plane,
+                              enum pipe_resource_param param,
+                              uint64_t *value);
+
+   /**
     * Get stride and offset for the given pipe resource without the need to get
     * a winsys_handle.
     */