hack on linear gradient
Am I going nuts or can we get this down to just adds and converts in the loop? #floats #n9 BUG=skia:3592 CQ_INCLUDE_TRYBOTS=client.skia.android:Test-Android-Nexus9-TegraK1-Arm64-Release-Trybot Review URL: https://codereview.chromium.org/1008973004
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@ -21,8 +21,8 @@ static uint32_t lcg_rand(uint32_t* seed) {
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// I'm having better luck getting these to constant-propagate away as template parameters.
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template <bool kClamp, bool kWide>
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struct PMFloatBench : public Benchmark {
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PMFloatBench() {}
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struct PMFloatGetSetBench : public Benchmark {
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PMFloatGetSetBench() {}
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const char* onGetName() SK_OVERRIDE {
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switch (kClamp << 1 | kWide) {
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@ -92,7 +92,42 @@ struct PMFloatBench : public Benchmark {
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};
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// Extra () help DEF_BENCH not get confused by the comma inside the <>.
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DEF_BENCH(return (new PMFloatBench< true, true>);)
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DEF_BENCH(return (new PMFloatBench<false, true>);)
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DEF_BENCH(return (new PMFloatBench< true, false>);)
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DEF_BENCH(return (new PMFloatBench<false, false>);)
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DEF_BENCH(return (new PMFloatGetSetBench< true, true>);)
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DEF_BENCH(return (new PMFloatGetSetBench<false, true>);)
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DEF_BENCH(return (new PMFloatGetSetBench< true, false>);)
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DEF_BENCH(return (new PMFloatGetSetBench<false, false>);)
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struct PMFloatGradientBench : public Benchmark {
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const char* onGetName() override { return "PMFloat_gradient"; }
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bool isSuitableFor(Backend backend) override { return backend == kNonRendering_Backend; }
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SkPMColor fDevice[100];
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void onDraw(const int loops, SkCanvas*) override {
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Sk4f c0 = SkPMFloat::FromARGB(255, 255, 0, 0),
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c1 = SkPMFloat::FromARGB(255, 0, 0, 255),
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dc = c1 - c0,
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fx(0.1f),
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dx(0.002f),
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dcdx(dc*dx),
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dcdx4(dcdx+dcdx+dcdx+dcdx);
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for (int n = 0; n < loops; n++) {
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Sk4f a = c0 + dc*fx, // TODO: add 0.5f, here call trunc() instead of get().
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b = a + dcdx,
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c = b + dcdx,
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d = c + dcdx;
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for (size_t i = 0; i < SK_ARRAY_COUNT(fDevice); i += 4) {
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fDevice[i+0] = SkPMFloat(a).get();
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fDevice[i+1] = SkPMFloat(b).get();
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fDevice[i+2] = SkPMFloat(c).get();
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fDevice[i+3] = SkPMFloat(d).get();
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a += dcdx4;
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b += dcdx4;
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c += dcdx4;
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d += dcdx4;
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}
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}
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}
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};
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DEF_BENCH(return new PMFloatGradientBench;)
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