Added new bench to test out 1xN BitmapProcShaders

https://codereview.appspot.com/7160043/



git-svn-id: http://skia.googlecode.com/svn/trunk@7264 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 130 insertions, 0 deletions

diff --git a/bench/TileBench.cpp b/bench/TileBench.cpp
new file mode 100644
index 0000000000..661be9abea
--- /dev/null
+++ b/bench/TileBench.cpp
@@ -0,0 +1,130 @@
+
+/*
+ * 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 "SkBitmap.h"
+#include "SkCanvas.h"
+#include "SkShader.h"
+#include "SkString.h"
+
+static void create_gradient(SkBitmap* bm) {
+    SkASSERT(1 == bm->width());
+    const int height = bm->height();
+
+    float deltaB = 255.0f / height;
+    float blue = 255.0f;
+
+    SkAutoLockPixels lock(*bm);
+    for (int y = 0; y < height; y++) {
+        *bm->getAddr32(0, y) = SkColorSetRGB(0, 0, (U8CPU) blue);
+        blue -= deltaB;
+    }
+}
+
+// Test out the special case of a tiled 1xN texture. Test out opacity,
+// filtering and the different tiling modes
+class ConstXTileBench : public SkBenchmark {
+    SkPaint             fPaint;
+    SkString            fName;
+    bool                fDoFilter;
+    bool                fDoTrans;
+    enum { N = SkBENCHLOOP(20) };
+    static const int kWidth = 1;
+    static const int kHeight = 300;
+
+public:
+    ConstXTileBench(void* param, 
+                    SkShader::TileMode xTile,
+                    SkShader::TileMode yTile,
+                    bool doFilter,
+                    bool doTrans) 
+        : INHERITED(param)
+        , fDoFilter(doFilter)
+        , fDoTrans(doTrans) {
+        SkBitmap bm;
+
+        bm.setConfig(SkBitmap::kARGB_8888_Config, kWidth, kHeight);
+
+        bm.allocPixels();
+        bm.eraseColor(SK_ColorWHITE);
+        bm.setIsOpaque(true);
+
+        create_gradient(&bm);
+
+        SkShader* s = SkShader::CreateBitmapShader(bm, xTile, yTile);
+        fPaint.setShader(s)->unref();
+
+        fName.printf("constXTile_");
+
+        static const char* gTileModeStr[SkShader::kTileModeCount] = { "C", "R", "M" };
+        fName.append(gTileModeStr[xTile]);
+        fName.append(gTileModeStr[yTile]);
+
+        if (doFilter) {
+            fName.append("_filter");
+        }
+
+        if (doTrans) {
+            fName.append("_trans");
+        }
+    }
+
+protected:
+    virtual const char* onGetName() {
+        return fName.c_str();
+    }
+
+    virtual void onDraw(SkCanvas* canvas) {
+        SkPaint paint(fPaint);
+        this->setupPaint(&paint);
+        paint.setFilterBitmap(fDoFilter);
+        if (fDoTrans) {
+            paint.setColor(SkColorSetARGBMacro(0x80, 0xFF, 0xFF, 0xFF));
+        }
+
+        SkRect r;
+
+        if (fDoFilter) {
+            r = SkRect::MakeWH(SkIntToScalar(2 * 640), SkIntToScalar(2 * 480));
+            canvas->scale(SK_ScalarHalf, SK_ScalarHalf);
+        } else {
+            r = SkRect::MakeWH(SkIntToScalar(640), SkIntToScalar(480));
+        }
+
+        SkPaint bgPaint;
+        bgPaint.setColor(SK_ColorWHITE);
+
+        for (int i = 0; i < N; i++) {
+            if (fDoTrans) {
+                canvas->drawRect(r, bgPaint);
+            }
+
+            canvas->drawRect(r, paint);
+        }
+    }
+
+private:
+    typedef SkBenchmark INHERITED;
+};
+
+
+DEF_BENCH(return new ConstXTileBench(p, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, false, false))
+DEF_BENCH(return new ConstXTileBench(p, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, false, false))
+DEF_BENCH(return new ConstXTileBench(p, SkShader::kMirror_TileMode, SkShader::kMirror_TileMode, false, false))
+
+DEF_BENCH(return new ConstXTileBench(p, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, true, false))
+DEF_BENCH(return new ConstXTileBench(p, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, true, false))
+DEF_BENCH(return new ConstXTileBench(p, SkShader::kMirror_TileMode, SkShader::kMirror_TileMode, true, false))
+
+DEF_BENCH(return new ConstXTileBench(p, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, false, true))
+DEF_BENCH(return new ConstXTileBench(p, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, false, true))
+DEF_BENCH(return new ConstXTileBench(p, SkShader::kMirror_TileMode, SkShader::kMirror_TileMode, false, true))
+
+DEF_BENCH(return new ConstXTileBench(p, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, true, true))
+DEF_BENCH(return new ConstXTileBench(p, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, true, true))
+DEF_BENCH(return new ConstXTileBench(p, SkShader::kMirror_TileMode, SkShader::kMirror_TileMode, true, true))