Add backend GPU objects to fiddle app

TBR=bsalomon@google.com
Change-Id: I8876a4657f837436322150925233e0f36c91e8f0
Reviewed-on: https://skia-review.googlesource.com/72641
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Reviewed-by: Cary Clark <caryclark@google.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/gpu/GrBackendSurface.h b/include/gpu/GrBackendSurface.h
index c9d326bc36..ce6ad194ac 100644
--- a/include/gpu/GrBackendSurface.h
+++ b/include/gpu/GrBackendSurface.h
@@ -96,6 +96,9 @@ private:
 
 class SK_API GrBackendRenderTarget {
 public:
+    // Creates an invalid backend texture.
+    GrBackendRenderTarget() : fConfig(kUnknown_GrPixelConfig) {}
+
     GrBackendRenderTarget(int width,
                           int height,
                           int sampleCnt,
@@ -127,6 +130,9 @@ public:
     const GrVkImageInfo* getVkImageInfo() const;
 #endif
 
+    // Returns true if the backend texture has been initialized.
+    bool isValid() const { return fConfig != kUnknown_GrPixelConfig; }
+
 private:
     // Friending for access to the GrPixelConfig
     friend class SkSurface;