Add benchmark for PremultiplyAlpha and UnpremultiplyAlpha in Skia
BUG=248549
R=tomhudson@chromium.org, bsalomon@chromium.org, reed@google.com, noel@chromium.org, tomhudson@google.com
Author: jun.a.jiang@intel.com
Review URL: https://chromiumcodereview.appspot.com/16654004
git-svn-id: http://skia.googlecode.com/svn/trunk@9569 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/PremulAndUnpremulAlphaOpsBench.cpp b/bench/PremulAndUnpremulAlphaOpsBench.cpp
new file mode 100644
index 0000000..f552097
--- /dev/null
+++ b/bench/PremulAndUnpremulAlphaOpsBench.cpp
@@ -0,0 +1,74 @@
+
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkBenchmark.h"
+#include "SkCanvas.h"
+#include "SkConfig8888.h"
+#include "SkString.h"
+
+class PremulAndUnpremulAlphaOpsBench : public SkBenchmark {
+public:
+ PremulAndUnpremulAlphaOpsBench(void* param, SkCanvas::Config8888 config)
+ : INHERITED(param) {
+ fUnPremulConfig = config;
+ fName.printf("premul_and_unpremul_alpha_%s",
+ (config == SkCanvas::kRGBA_Unpremul_Config8888) ?
+ "RGBA8888" : "Native8888");
+ }
+
+protected:
+ virtual const char* onGetName() SK_OVERRIDE {
+ return fName.c_str();
+ }
+
+ virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+ canvas->clear(SK_ColorBLACK);
+ SkISize size = canvas->getDeviceSize();
+
+ SkBitmap bmp1;
+ bmp1.setConfig(SkBitmap::kARGB_8888_Config, size.width(),
+ size.height());
+ bmp1.allocPixels();
+ SkAutoLockPixels alp(bmp1);
+ uint32_t* pixels = reinterpret_cast<uint32_t*>(bmp1.getPixels());
+ for (int h = 0; h < size.height(); ++h) {
+ for (int w = 0; w < size.width(); ++w)
+ pixels[h * size.width() + w] = SkPackConfig8888(fUnPremulConfig,
+ h & 0xFF, w & 0xFF, w & 0xFF, w & 0xFF);
+ }
+
+ SkBitmap bmp2;
+ bmp2.setConfig(SkBitmap::kARGB_8888_Config, size.width(),
+ size.height());
+
+ static const int kLoopCount = SkBENCHLOOP(10);
+ for (int loop = 0; loop < kLoopCount; ++loop) {
+ // Unpremul -> Premul
+ canvas->writePixels(bmp1, 0, 0, fUnPremulConfig);
+ // Premul -> Unpremul
+ canvas->readPixels(&bmp2, 0, 0, fUnPremulConfig);
+ }
+ }
+
+private:
+ SkCanvas::Config8888 fUnPremulConfig;
+ SkString fName;
+ typedef SkBenchmark INHERITED;
+};
+
+static SkBenchmark* fact0(void* p) {
+ return new PremulAndUnpremulAlphaOpsBench(p,
+ SkCanvas::kRGBA_Unpremul_Config8888);
+}
+static SkBenchmark* fact1(void* p) {
+ return new PremulAndUnpremulAlphaOpsBench(p,
+ SkCanvas::kNative_Unpremul_Config8888);
+}
+
+static BenchRegistry gReg0(fact0);
+static BenchRegistry gReg1(fact1);
diff --git a/gyp/bench.gypi b/gyp/bench.gypi
index 5ae472b..c7f0c11 100644
--- a/gyp/bench.gypi
+++ b/gyp/bench.gypi
@@ -47,6 +47,7 @@
'../bench/PicturePlaybackBench.cpp',
'../bench/PictureRecordBench.cpp',
'../bench/ReadPixBench.cpp',
+ '../bench/PremulAndUnpremulAlphaOpsBench.cpp',
'../bench/RectBench.cpp',
'../bench/RectoriBench.cpp',
'../bench/RefCntBench.cpp',