Improve DDLPromiseImageHelper

Split apart creation of the callback contexts and the backend textures
   This allows the texture upload to be done separately on the

Add a backendFormat member to the promise image callback context
   This allows the promise images to be created in CreatePromiseImages
   before the backend textures have been created (i.e., the backend
   textures can now be created on the gpu-thread so we have no
   guarantee they will be available when the SKP is being reinflated
   w/ promise images)

Change-Id: I1e21385e450a5ef27dd6950d9d6aee737aa7515d
Reviewed-by: Greg Daniel <>
Commit-Queue: Robert Phillips <>
4 files changed