diff --git a/tools/gpu/GrTest.cpp b/tools/gpu/GrTest.cpp
index 2160c7f..ae86aae 100644
--- a/tools/gpu/GrTest.cpp
+++ b/tools/gpu/GrTest.cpp
@@ -78,6 +78,30 @@
     }
 }
 
+GrBackendFormat CreateBackendFormatFromTexture(const GrBackendTexture& tex) {
+    switch (tex.backend()) {
+#ifdef SK_VULKAN
+        case kVulkan_GrBackend: {
+            const GrVkImageInfo* vkInfo = tex.getVkImageInfo();
+            SkASSERT(vkInfo);
+            return GrBackendFormat::MakeVk(vkInfo->fFormat);
+        }
+#endif
+        case kOpenGL_GrBackend: {
+            const GrGLTextureInfo* glInfo = tex.getGLTextureInfo();
+            SkASSERT(glInfo);
+            return GrBackendFormat::MakeGL(glInfo->fFormat, glInfo->fTarget);
+        }
+        case kMock_GrBackend: {
+            const GrMockTextureInfo* mockInfo = tex.getMockTextureInfo();
+            SkASSERT(mockInfo);
+            return GrBackendFormat::MakeMock(mockInfo->fConfig);
+        }
+        default:
+            return GrBackendFormat();
+    }
+}
+
 }  // namespace GrTest
 
 bool GrSurfaceProxy::isWrapped_ForTesting() const {