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      1 #include "Benchmark.h"
      2 #include "SkColorPriv.h"
      3 #include "SkMatrix.h"
      4 #include "SkPaint.h"
      5 #include "SkRandom.h"
      6 #include "SkString.h"
      7 
      8 #define TILE(x, width)  (((x) & 0xFFFF) * width >> 16)
      9 
     10 class InterpBench : public Benchmark {
     11     enum {
     12         kBuffer = 128,
     13         kLoop   = 20000
     14     };
     15     SkString    fName;
     16     int16_t     fDst[kBuffer];
     17     float       fFx, fDx;
     18 public:
     19     InterpBench(const char name[])  {
     20         fName.printf("interp_%s", name);
     21         fFx = 3.3f;
     22         fDx = 0.1257f;
     23     }
     24 
     25     virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
     26         return backend == kNonRendering_Backend;
     27     }
     28 
     29     virtual void performTest(int16_t dst[], float x, float dx, int count) = 0;
     30 
     31 protected:
     32     virtual int mulLoopCount() const { return 1; }
     33 
     34     virtual const char* onGetName() {
     35         return fName.c_str();
     36     }
     37 
     38     virtual void onDraw(const int loops, SkCanvas*) {
     39         int n = loops * this->mulLoopCount();
     40         for (int i = 0; i < n; i++) {
     41             this->performTest(fDst, fFx, fDx, kBuffer);
     42         }
     43     }
     44 
     45 private:
     46     typedef Benchmark INHERITED;
     47 };
     48 
     49 class Fixed16D16Interp : public InterpBench {
     50 public:
     51     Fixed16D16Interp() : INHERITED("16.16") {}
     52 
     53 protected:
     54     virtual void performTest(int16_t dst[], float fx, float dx, int count) SK_OVERRIDE {
     55         SkFixed curr = SkFloatToFixed(fx);
     56         SkFixed step = SkFloatToFixed(dx);
     57         for (int i = 0; i < count; i += 4) {
     58             dst[i + 0] = TILE(curr, count); curr += step;
     59             dst[i + 1] = TILE(curr, count); curr += step;
     60             dst[i + 2] = TILE(curr, count); curr += step;
     61             dst[i + 3] = TILE(curr, count); curr += step;
     62         }
     63     }
     64 private:
     65     typedef InterpBench INHERITED;
     66 };
     67 
     68 class Fixed32D32Interp : public InterpBench {
     69 public:
     70     Fixed32D32Interp() : INHERITED("32.32") {}
     71 
     72 protected:
     73     virtual void performTest(int16_t dst[], float fx, float dx, int count) SK_OVERRIDE {
     74         int64_t curr = (int64_t)(fx * 65536 * 655536);
     75         int64_t step = (int64_t)(dx * 65536 * 655536);
     76         SkFixed tmp;
     77         for (int i = 0; i < count; i += 4) {
     78             tmp = (SkFixed)(curr >> 16);
     79             dst[i + 0] = TILE(tmp, count);
     80             curr += step;
     81 
     82             tmp = (SkFixed)(curr >> 16);
     83             dst[i + 1] = TILE(tmp, count);
     84             curr += step;
     85 
     86             tmp = (SkFixed)(curr >> 16);
     87             dst[i + 2] = TILE(tmp, count);
     88             curr += step;
     89 
     90             tmp = (SkFixed)(curr >> 16);
     91             dst[i + 3] = TILE(tmp, count);
     92             curr += step;
     93         }
     94     }
     95 private:
     96     typedef InterpBench INHERITED;
     97 };
     98 
     99 class Fixed16D48Interp : public InterpBench {
    100 public:
    101     Fixed16D48Interp() : INHERITED("16.48") {}
    102 
    103 protected:
    104     virtual void performTest(int16_t dst[], float fx, float dx, int count) SK_OVERRIDE {
    105         int64_t curr = (int64_t)(fx * 65536 * 655536 * 65536);
    106         int64_t step = (int64_t)(dx * 65536 * 655536 * 65536);
    107         SkFixed tmp;
    108         for (int i = 0; i < count; i += 4) {
    109             tmp = (SkFixed) (curr >> 32); dst[i + 0] = TILE(tmp, count); curr += step;
    110             tmp = (SkFixed) (curr >> 32); dst[i + 1] = TILE(tmp, count); curr += step;
    111             tmp = (SkFixed) (curr >> 32); dst[i + 2] = TILE(tmp, count); curr += step;
    112             tmp = (SkFixed) (curr >> 32); dst[i + 3] = TILE(tmp, count); curr += step;
    113         }
    114     }
    115 private:
    116     typedef InterpBench INHERITED;
    117 };
    118 
    119 class FloatInterp : public InterpBench {
    120 public:
    121     FloatInterp() : INHERITED("float") {}
    122 
    123 protected:
    124     virtual void performTest(int16_t dst[], float fx, float dx, int count) SK_OVERRIDE {
    125         SkFixed tmp;
    126         for (int i = 0; i < count; i += 4) {
    127             tmp = SkFloatToFixed(fx); dst[i + 0] = TILE(tmp, count); fx += dx;
    128             tmp = SkFloatToFixed(fx); dst[i + 1] = TILE(tmp, count); fx += dx;
    129             tmp = SkFloatToFixed(fx); dst[i + 2] = TILE(tmp, count); fx += dx;
    130             tmp = SkFloatToFixed(fx); dst[i + 3] = TILE(tmp, count); fx += dx;
    131         }
    132     }
    133 private:
    134     typedef InterpBench INHERITED;
    135 };
    136 
    137 class DoubleInterp : public InterpBench {
    138 public:
    139     DoubleInterp() : INHERITED("double") {}
    140 
    141 protected:
    142     virtual void performTest(int16_t dst[], float fx, float dx, int count) SK_OVERRIDE {
    143         double ffx = fx;
    144         double ddx = dx;
    145         SkFixed tmp;
    146         for (int i = 0; i < count; i += 4) {
    147             tmp = SkDoubleToFixed(ffx); dst[i + 0] = TILE(tmp, count); ffx += ddx;
    148             tmp = SkDoubleToFixed(ffx); dst[i + 1] = TILE(tmp, count); ffx += ddx;
    149             tmp = SkDoubleToFixed(ffx); dst[i + 2] = TILE(tmp, count); ffx += ddx;
    150             tmp = SkDoubleToFixed(ffx); dst[i + 3] = TILE(tmp, count); ffx += ddx;
    151         }
    152     }
    153 private:
    154     typedef InterpBench INHERITED;
    155 };
    156 
    157 ///////////////////////////////////////////////////////////////////////////////
    158 
    159 DEF_BENCH( return new Fixed16D16Interp(); )
    160 DEF_BENCH( return new Fixed32D32Interp(); )
    161 DEF_BENCH( return new Fixed16D48Interp(); )
    162 DEF_BENCH( return new FloatInterp(); )
    163 DEF_BENCH( return new DoubleInterp(); )
    164