Add GM configs that test rendering to a GL backend texture and render target

This also adds GrGpu::create/deleteTestingOnlyBackendRenderTarget. Implemented in GL only for now.

Change-Id: I9e5fdc953c4a249959af89e08332f520cefe9d90
Reviewed-on: https://skia-review.googlesource.com/113305
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/tools/skpbench/skpbench.cpp b/tools/skpbench/skpbench.cpp
index 562c48165f..92a642af1c 100644
--- a/tools/skpbench/skpbench.cpp
+++ b/tools/skpbench/skpbench.cpp
@@ -274,6 +274,11 @@ int main(int argc, char** argv) {
                         SkScalarCeilToInt(skp->cullRect().height()), width, height);
     }
 
+    if (config->getSurfType() != SkCommandLineConfigGpu::SurfType::kDefault) {
+        exitf(ExitErr::kUnavailable, "This tool only supports the default surface type. (%s)",
+              config->getTag().c_str());
+    }
+
     // Create a context.
     GrContextOptions ctxOptions;
     SetCtxOptionsFromCommonFlags(&ctxOptions);