Add HardStopGradientBench.cpp
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2131643002
Review-Url: https://codereview.chromium.org/2131643002
diff --git a/bench/HardStopGradientBench.cpp b/bench/HardStopGradientBench.cpp
new file mode 100644
index 0000000..8851cec
--- /dev/null
+++ b/bench/HardStopGradientBench.cpp
@@ -0,0 +1,118 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Benchmark.h"
+
+#include "SkCanvas.h"
+#include "SkShader.h"
+#include "SkGradientShader.h"
+#include "SkString.h"
+#include "SkColor.h"
+#include "SkPaint.h"
+
+static const char* get_tilemode_name(SkShader::TileMode tilemode) {
+ switch (tilemode) {
+ case SkShader::kClamp_TileMode:
+ return "clamp";
+ case SkShader::kRepeat_TileMode:
+ return "repeat";
+ case SkShader::kMirror_TileMode:
+ return "mirror";
+ default:
+ SkDEBUGFAIL("Unknown tilemode");
+ return "error";
+ }
+}
+
+class HardStopGradientBench : public Benchmark {
+public:
+ HardStopGradientBench(SkShader::TileMode tilemode, int count) {
+ fName.printf("hardstop_%s_%03d_colors", get_tilemode_name(tilemode), count);
+
+ fTileMode = tilemode;
+ fColorCount = count;
+ }
+
+ const char* onGetName() override {
+ return fName.c_str();
+ }
+
+ SkIPoint onGetSize() override {
+ return SkIPoint::Make(kSize, kSize);
+ }
+
+ void onPreDraw(SkCanvas* canvas) override {
+ // Left to right
+ SkPoint points[2] = {
+ SkPoint::Make(0, kSize/2),
+ SkPoint::Make(kSize-1, kSize/2),
+ };
+
+ // "Evenly spaced" colors
+ SkColor colors[50];
+ for (int i = 0; i < fColorCount; i++) {
+ colors[i] = i * (0xffffffff / fColorCount);
+ }
+
+ // Create a hard stop
+ SkScalar positions[50];
+ positions[0] = 0.0f;
+ positions[1] = 0.0f;
+ for (int i = 2; i < fColorCount; i++) {
+ // Evenly spaced afterwards
+ positions[i] = i / (fColorCount - 1.0f);
+ }
+
+ fPaint.setShader(SkGradientShader::MakeLinear(points,
+ colors,
+ positions,
+ fColorCount,
+ fTileMode,
+ 0,
+ nullptr));
+ }
+
+ /*
+ * Draw simple linear gradient from left to right
+ */
+ void onDraw(int loops, SkCanvas* canvas) override {
+ for (int i = 0; i < loops; i++) {
+ canvas->drawPaint(fPaint);
+ }
+ }
+
+private:
+ static const int kSize = 500;
+
+ SkShader::TileMode fTileMode;
+ SkString fName;
+ int fColorCount;
+ SkPaint fPaint;
+
+ typedef Benchmark INHERITED;
+};
+
+// Clamp
+DEF_BENCH(return new HardStopGradientBench(SkShader::kClamp_TileMode, 5);)
+DEF_BENCH(return new HardStopGradientBench(SkShader::kClamp_TileMode, 10);)
+DEF_BENCH(return new HardStopGradientBench(SkShader::kClamp_TileMode, 25);)
+DEF_BENCH(return new HardStopGradientBench(SkShader::kClamp_TileMode, 50);)
+DEF_BENCH(return new HardStopGradientBench(SkShader::kClamp_TileMode, 100);)
+
+// Repeat
+DEF_BENCH(return new HardStopGradientBench(SkShader::kRepeat_TileMode, 5);)
+DEF_BENCH(return new HardStopGradientBench(SkShader::kRepeat_TileMode, 10);)
+DEF_BENCH(return new HardStopGradientBench(SkShader::kRepeat_TileMode, 25);)
+DEF_BENCH(return new HardStopGradientBench(SkShader::kRepeat_TileMode, 50);)
+DEF_BENCH(return new HardStopGradientBench(SkShader::kRepeat_TileMode, 100);)
+
+// Mirror
+DEF_BENCH(return new HardStopGradientBench(SkShader::kMirror_TileMode, 5);)
+DEF_BENCH(return new HardStopGradientBench(SkShader::kMirror_TileMode, 10);)
+DEF_BENCH(return new HardStopGradientBench(SkShader::kMirror_TileMode, 25);)
+DEF_BENCH(return new HardStopGradientBench(SkShader::kMirror_TileMode, 50);)
+DEF_BENCH(return new HardStopGradientBench(SkShader::kMirror_TileMode, 100);)