st/dri: enable DRIimage modifier queries

return the modifier selected by the driver when creating this image.

v2: since we can use winsys_handle->modifier to serve these, remove
    DRIimage->modifier from v1.
    use DRM_API_HANDLE_TYPE_KMS instead of DRM_API_HANDLE_TYPE_FD to avoid
    ownership transfer. (Lucas)

Suggested-by: Daniel Stone <[email protected]>
Signed-off-by: Varad Gautam <[email protected]>
Cc: Lucas Stach <[email protected]>
Reviewed-by: Lucas Stach <[email protected]>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/gallium/state_trackers/dri/dri2.c b/src/gallium/state_trackers/dri/dri2.c
index 740c6a4aaf5..465100b0eda 100644
--- a/src/gallium/state_trackers/dri/dri2.c
+++ b/src/gallium/state_trackers/dri/dri2.c
@@ -1088,6 +1088,18 @@ dri2_query_image(__DRIimage *image, int attrib, int *value)
    case __DRI_IMAGE_ATTRIB_NUM_PLANES:
       *value = 1;
       return GL_TRUE;
+   case __DRI_IMAGE_ATTRIB_MODIFIER_UPPER:
+      whandle.type = DRM_API_HANDLE_TYPE_KMS;
+      image->texture->screen->resource_get_handle(image->texture->screen,
+            NULL, image->texture, &whandle, usage);
+      *value = (whandle.modifier >> 32) & 0xffffffff;
+      return GL_TRUE;
+   case __DRI_IMAGE_ATTRIB_MODIFIER_LOWER:
+      whandle.type = DRM_API_HANDLE_TYPE_KMS;
+      image->texture->screen->resource_get_handle(image->texture->screen,
+            NULL, image->texture, &whandle, usage);
+      *value = whandle.modifier & 0xffffffff;
+      return GL_TRUE;
    default:
       return GL_FALSE;
    }