add BitmapBench

git-svn-id: http://skia.googlecode.com/svn/trunk@83 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 164 insertions, 0 deletions

diff --git a/bench/BitmapBench.cpp b/bench/BitmapBench.cpp
new file mode 100644
index 0000000000..22c0a01d24
--- /dev/null
+++ b/bench/BitmapBench.cpp
@@ -0,0 +1,164 @@
+#include "SkBenchmark.h"
+#include "SkBitmap.h"
+#include "SkPaint.h"
+#include "SkCanvas.h"
+#include "SkColorPriv.h"
+#include "SkRandom.h"
+#include "SkString.h"
+
+static const char* gTileName[] = {
+    "clamp", "repeat", "mirror"
+};
+
+static const char* gConfigName[] = {
+    "ERROR", "a1", "a8", "index8", "565", "4444", "8888"
+};
+
+static void drawIntoBitmap(const SkBitmap& bm) {
+    const int w = bm.width();
+    const int h = bm.height();
+
+    SkCanvas canvas(bm);
+    SkPaint p;
+    p.setAntiAlias(true);
+    p.setColor(SK_ColorRED);
+    canvas.drawCircle(SkIntToScalar(w)/2, SkIntToScalar(h)/2,
+                      SkIntToScalar(SkMin32(w, h))*3/8, p);
+    
+    SkRect r;
+    r.set(0, 0, SkIntToScalar(w), SkIntToScalar(h));
+    p.setStyle(SkPaint::kStroke_Style);
+    p.setStrokeWidth(SkIntToScalar(4));
+    p.setColor(SK_ColorBLUE);
+    canvas.drawRect(r, p);
+}
+
+static int conv6ToByte(int x) {
+    return x * 0xFF / 5;
+}
+
+static int convByteTo6(int x) {
+    return x * 5 / 255;
+}
+
+static uint8_t compute666Index(SkPMColor c) {
+    int r = SkGetPackedR32(c);
+    int g = SkGetPackedG32(c);
+    int b = SkGetPackedB32(c);
+    
+    return convByteTo6(r) * 36 + convByteTo6(g) * 6 + convByteTo6(b);
+}
+
+static void convertToIndex666(const SkBitmap& src, SkBitmap* dst) {
+    SkColorTable* ctable = new SkColorTable(216);
+    SkPMColor* colors = ctable->lockColors();
+    // rrr ggg bbb
+    for (int r = 0; r < 6; r++) {
+        int rr = conv6ToByte(r);
+        for (int g = 0; g < 6; g++) {
+            int gg = conv6ToByte(g);
+            for (int b = 0; b < 6; b++) {
+                int bb = conv6ToByte(b);
+                *colors++ = SkPreMultiplyARGB(0xFF, rr, gg, bb);
+            }
+        }
+    }
+    ctable->unlockColors(true);
+    dst->setConfig(SkBitmap::kIndex8_Config, src.width(), src.height());
+    dst->allocPixels(ctable);
+    ctable->unref();
+    
+    SkAutoLockPixels alps(src);
+    SkAutoLockPixels alpd(*dst);
+
+    for (int y = 0; y < src.height(); y++) {
+        const SkPMColor* srcP = src.getAddr32(0, y);
+        uint8_t* dstP = dst->getAddr8(0, y);
+        for (int x = src.width() - 1; x >= 0; --x) {
+            *dstP++ = compute666Index(*srcP++);
+        }
+    }
+}
+
+/*  Variants for bitmaps
+ 
+    - src depth (32 w+w/o alpha), 565, 4444, index, a8
+    - paint options: filtering, dither, alpha
+    - matrix options: translate, scale, rotate, persp
+    - tiling: none, repeat, mirror, clamp
+    
+ */
+
+class BitmapBench : public SkBenchmark {
+    SkBitmap    fBitmap;
+    SkPaint     fPaint;
+    int         fTileX, fTileY; // -1 means don't use shader
+    SkString    fName;
+    enum { N = 300 };
+public:
+    BitmapBench(SkBitmap::Config c, int tx = -1, int ty = -1) : fTileX(tx), fTileY(ty) {
+        const int w = 128;
+        const int h = 128;
+        SkBitmap bm;
+
+        if (SkBitmap::kIndex8_Config == c) {
+            bm.setConfig(SkBitmap::kARGB_8888_Config, w, h);
+        } else {
+            bm.setConfig(c, w, h);
+        }
+        bm.allocPixels();
+        bm.eraseColor(0);
+        
+        drawIntoBitmap(bm);
+
+        if (SkBitmap::kIndex8_Config == c) {
+            convertToIndex666(bm, &fBitmap);
+        } else {
+            fBitmap = bm;
+        }
+    }
+
+protected:
+    virtual const char* onGetName() {
+        fName.set("bitmap");
+        if (fTileX >= 0) {
+            fName.appendf("_%s", gTileName[fTileX]);
+            if (fTileY != fTileX) {
+                fName.appendf("_%s", gTileName[fTileY]);
+            }
+        }
+        fName.appendf("_%s", gConfigName[fBitmap.config()]);
+        return fName.c_str();
+    }
+
+    virtual void onDraw(SkCanvas* canvas) {
+        SkIPoint dim = this->getSize();
+        SkRandom rand;
+
+        SkPaint paint(fPaint);
+        this->setupPaint(&paint);
+
+        const SkBitmap& bitmap = fBitmap;
+        const SkScalar x0 = SkIntToScalar(-bitmap.width() / 2);
+        const SkScalar y0 = SkIntToScalar(-bitmap.height() / 2);
+        
+        for (int i = 0; i < N; i++) {
+            SkScalar x = x0 + rand.nextUScalar1() * dim.fX;
+            SkScalar y = y0 + rand.nextUScalar1() * dim.fY;
+            canvas->drawBitmap(bitmap, x, y, &paint);
+        }
+    }
+
+private:
+    typedef SkBenchmark INHERITED;
+};
+
+static SkBenchmark* Fact0(void*) { return new BitmapBench(SkBitmap::kARGB_8888_Config); }
+static SkBenchmark* Fact1(void*) { return new BitmapBench(SkBitmap::kRGB_565_Config); }
+static SkBenchmark* Fact2(void*) { return new BitmapBench(SkBitmap::kARGB_4444_Config); }
+static SkBenchmark* Fact3(void*) { return new BitmapBench(SkBitmap::kIndex8_Config); }
+
+static BenchRegistry gReg0(Fact0);
+static BenchRegistry gReg1(Fact1);
+static BenchRegistry gReg2(Fact2);
+static BenchRegistry gReg3(Fact3);