Generate list of GPU contexts outside SurfaceTest tests

dm/DM.cpp

Index: dm/DM.cpp
diff --git a/dm/DM.cpp b/dm/DM.cpp
index fb9699c049478d1a052fb269dedcdd73a8af77bc..c191ac9c2ed895aa4b0364f3b0c7a7a0bd88e712 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -1147,6 +1147,34 @@ int dm_main() {
     return 0;
 }
 
+void skiatest::RunWithGPUTestContexts(void(*test)(skiatest::Reporter*, GrContext*),
+                                      skiatest::GPUTestContexts testContexts,
+                                      skiatest::Reporter* reporter,
+                                      GrContextFactory* factory) {
+#if SK_SUPPORT_GPU
+    for (int i = 0; i < GrContextFactory::kGLContextTypeCnt; ++i) {
+        GrContextFactory::GLContextType glCtxType = (GrContextFactory::GLContextType) i;
+        int contextSelector = skiatest::kNone_GPUTestContexts;
+        if (GrContextFactory::IsRenderingGLContext(glCtxType)) {
+            contextSelector |= kAllRendering_GPUTestContexts;
+        }
+        if (glCtxType == GrContextFactory::kNative_GLContextType) {
+            contextSelector |= kNative_GPUTestContexts;
+        }
+        if (glCtxType == GrContextFactory::kNull_GLContextType) {
+            contextSelector |= kNull_GPUTestContexts;
+        }
+        if ((testContexts & contextSelector) == 0) {
+            continue;
+        }
+        if (GrContext* context = factory->get(glCtxType)) {
+            test(reporter, context);

[bsalomon, 2015/11/17 14:49:36]

I'm in the process of adding tests that would want to also access the
SkGLContext that backs the GrContext. Do you think we could pass a struct here
rather than GrContext*? Something like

struct GrContextInfo {
    GrContext*    fContext;
    SkGLContext*  fGLContext;
};

? That way if we decide to extend the set of things passed we don't need to
update each test.

+        }
+    }
+#endif
+}
+
+
 #if !defined(SK_BUILD_FOR_IOS)
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);