MakeBackendTextureFromSkImage

Creates a static function on SkImage which converts the SkImage to a
GrBackendTexture. The texture is unowned by Skia, and must be deleted
by the caller. Allows for a no-copy / no-conversion fast path if the
provided image is unowned (unique()) and texture backed.

Change-Id: I8a48f9cc39de792725cd72057d98cd1c4594daab
Reviewed-on: https://skia-review.googlesource.com/52440
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Eric Karl <ericrk@chromium.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/gpu/GrBackendSurface.h b/include/gpu/GrBackendSurface.h
index 647d20d52b..bf1e52c959 100644
--- a/include/gpu/GrBackendSurface.h
+++ b/include/gpu/GrBackendSurface.h
@@ -69,9 +69,10 @@ public:
     // it returns nullptr.
     const GrMockTextureInfo* getMockTextureInfo() const;
 
-private:
+    // Returns true if the backend texture has been initialized.
     bool isValid() const { return fConfig != kUnknown_GrPixelConfig; }
 
+private:
     int fWidth;         //<! width in pixels
     int fHeight;        //<! height in pixels
     GrPixelConfig fConfig;