st/dri: implement createImageWithModifiers in DRIimage

adds a pscreen->resource_create_with_modifiers() to create textures
with modifier.

v2:
- stylefixes (Emil Velikov)
- don't return selected modifier from resource_create_with_modifiers. we can
  use the winsys_handle to get this.

Signed-off-by: Varad Gautam <[email protected]>
Reviewed-by: Lucas Stach <[email protected]> (v1)
Cc: Lucas Stach <[email protected]>
Reviewed-by: Lucas Stach <[email protected]>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index 8b4239c61ae..5102827440e 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -328,6 +328,21 @@ struct pipe_screen {
     * driver doesn't support an on-disk shader cache.
     */
    struct disk_cache *(*get_disk_shader_cache)(struct pipe_screen *screen);
+
+   /**
+    * Create a new texture object from the given template info, taking
+    * format modifiers into account. \p modifiers specifies a list of format
+    * modifier tokens, as defined in drm_fourcc.h. The driver then picks the
+    * best modifier among these and creates the resource. \p count must
+    * contain the size of \p modifiers array.
+    *
+    * Returns NULL if an entry in \p modifiers is unsupported by the driver,
+    * or if only DRM_FORMAT_MOD_INVALID is provided.
+    */
+   struct pipe_resource * (*resource_create_with_modifiers)(
+                           struct pipe_screen *,
+                           const struct pipe_resource *templat,
+                           const uint64_t *modifiers, int count);
 };