Implement a benchmark for GrResourceCache

Adds "grresourcecache_add" and "grresourcecache_find" bench tests to test
GrResourceCache::add and GrResourceCache::find. The tests work only
with GPU backends, since GrResourceCache needs an GrGpu.

Modifies bench tests to override SkBenchmark::isSuitableFor(Backend)
function that specifies what kind of backend the test is inteded
for. This replaces the previous "fIsRendering" flag that would
indicate test that did no rendering.

Adds SkCanvas::getGrContext() call to get the GrContext that the
canvas ends up drawing to. The member function solves a common
use-case that is also used in the benchmark added here.

R=mtklein@google.com, bsalomon@google.com

Author: kkinnunen@nvidia.com

Review URL: https://codereview.chromium.org/73643005

git-svn-id: http://skia.googlecode.com/svn/trunk@12334 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 27 insertions, 7 deletions

diff --git a/bench/MathBench.cpp b/bench/MathBench.cpp
index 6327c3c580..8094219f9d 100644
--- a/bench/MathBench.cpp
+++ b/bench/MathBench.cpp
@@ -29,8 +29,10 @@ public:
         for (int i = 0; i < kBuffer; ++i) {
             fSrc[i] = rand.nextSScalar1();
         }
+    }
 
-        fIsRendering = false;
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
     virtual void performTest(float* SK_RESTRICT dst,
@@ -281,7 +283,10 @@ public:
             fProc = gRec[index].fProc;
             fName = gRec[index].fName;
         }
-        fIsRendering = false;
+    }
+
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
 protected:
@@ -346,7 +351,10 @@ public:
         } else {
             fName = "floor_std";
         }
-        fIsRendering = false;
+    }
+
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
     virtual void process(float) {}
@@ -404,7 +412,10 @@ public:
         } else {
             fName = "clz_intrinsic";
         }
-        fIsRendering = false;
+    }
+
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
     // just so the compiler doesn't remove our loops
@@ -457,7 +468,10 @@ public:
         }
 
         fName = "point_normalize";
-        fIsRendering = false;
+    }
+
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
     // just so the compiler doesn't remove our loops
@@ -501,7 +515,10 @@ public:
             fData[i%N] = rand.nextSScalar1();
         }
 
-        fIsRendering = false;
+    }
+
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
 protected:
@@ -534,7 +551,10 @@ class DivModBench : public SkBenchmark {
 public:
     explicit DivModBench(const char* name) {
         fName.printf("divmod_%s", name);
-        fIsRendering = false;
+    }
+
+    virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
+        return backend == kNonRendering_Backend;
     }
 
 protected: