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#include "SkBenchmark.h"
#include "SkColorPriv.h"
#include "SkRandom.h"
#include "SkString.h"
template <bool kFast, bool kScale>
class FourByteInterpBench : public SkBenchmark {
public:
FourByteInterpBench() {
fName.set("four_byte_interp");
fName.append(kFast ? "_fast" : "_slow");
fName.append(kScale ? "_255" : "_256");
// We'll exhaustively test all scales instead of using random numbers.
for (int i = 0; i <= 256; i++) {
fScales[i] = i;
}
if (kScale) fScales[256] = 255; // We'll just do 255 twice if we're limited to [0,255].
}
virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
return backend == kNonRendering_Backend;
}
virtual const char* onGetName() SK_OVERRIDE { return fName.c_str(); }
virtual void onDraw(SkCanvas*) SK_OVERRIDE {
const SkPMColor src = 0xAB998877, dst = 0x66334455;
volatile SkPMColor junk = 0;
for (int i = 0; i < 10*this->getLoops(); ++i) {
for (size_t j = 0; j <= 256; j++) {
const unsigned scale = fScales[j];
if (kFast && kScale) {
junk ^= SkFastFourByteInterp(src, dst, scale);
} else if (kFast) {
junk ^= SkFastFourByteInterp256(src, dst, scale);
} else if (kScale) {
junk ^= SkFourByteInterp(src, dst, scale);
} else {
junk ^= SkFourByteInterp256(src, dst, scale);
}
}
}
}
private:
SkString fName;
unsigned fScales[257]; // We need space for [0, 256].
};
#define COMMA ,
DEF_BENCH( return SkNEW(FourByteInterpBench<true COMMA true>); )
DEF_BENCH( return SkNEW(FourByteInterpBench<true COMMA false>); )
DEF_BENCH( return SkNEW(FourByteInterpBench<false COMMA true>); )
DEF_BENCH( return SkNEW(FourByteInterpBench<false COMMA false>); )
#undef COMMA
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