This is modeled on how we coordinate VkImage layout changes between
GrContext and clients.
A type GrGLTextureParameters is used to track the current parameter
state.
When a client creates a GrBackendTexture in order to wrap a resource
they created a new GrGLTextureParameters is created and the wrapped
GrGLTexture will share ownership.
When GrContext creates a non-wrapped GrGLTexture, the GrGLTexture
creates a new GrGLTextureParameters and any GrBackendTextures created
from that GrGLTexture will share ownership.
Clients indicate parameter changes by calling
GrBackendTexture::glTextureParametersModified().
We still assume all texture parameters may have changed after a call
to GrContext::resetContext() (for now). The "timestamp" that is used
to implement this has been moved from GrGpu to GrGLGpu as there were
no other use cases.
Change-Id: Ic24e00488fad254a29d5eec6890278b67df6efae
Bug: skia:7966
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/217385
Auto-Submit: Brian Salomon <bsalomon@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
e2826ab59c