4343654bc4
- Updates the logic to reflect the Loop-Blinn paper instead of the GPU gems website. - Removes the threshold for detecting local cusps. The serpentine codepath works for these cusps anyway, so what we really want to know is whether the discriminant is negative. - Makes sure to not scale the inflection function by 1/0. - Shifts the inflection function coefficients in d[] so they match the paper. - Stores the cubic discriminant in d[0]. Bug: skia: Change-Id: I909a522a0fd27c9c8dfbc27d968bc43eeb7a416f Reviewed-on: https://skia-review.googlesource.com/13304 Reviewed-by: Greg Daniel <egdaniel@google.com> Commit-Queue: Chris Dalton <csmartdalton@google.com>
69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Benchmark.h"
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#if SK_SUPPORT_GPU
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#include "GrPathUtils.h"
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#include "SkGeometry.h"
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class CubicKLMBench : public Benchmark {
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public:
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CubicKLMBench(SkScalar x0, SkScalar y0, SkScalar x1, SkScalar y1,
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SkScalar x2, SkScalar y2, SkScalar x3, SkScalar y3) {
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fPoints[0].set(x0, y0);
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fPoints[1].set(x1, y1);
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fPoints[2].set(x2, y2);
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fPoints[3].set(x3, y3);
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fName = "cubic_klm_";
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SkScalar d[4];
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switch (SkClassifyCubic(fPoints, d)) {
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case SkCubicType::kSerpentine:
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fName.append("serp");
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break;
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case SkCubicType::kLoop:
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fName.append("loop");
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break;
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default:
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SkFAIL("Unexpected cubic type");
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break;
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}
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}
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bool isSuitableFor(Backend backend) override {
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return backend == kNonRendering_Backend;
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}
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const char* onGetName() override {
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return fName.c_str();
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}
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void onDraw(int loops, SkCanvas*) override {
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SkPoint dst[10];
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SkMatrix klm;
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int loopIdx;
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for (int i = 0; i < loops * 50000; ++i) {
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GrPathUtils::chopCubicAtLoopIntersection(fPoints, dst, &klm, &loopIdx);
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}
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}
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private:
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SkPoint fPoints[4];
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SkString fName;
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typedef Benchmark INHERITED;
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};
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DEF_BENCH( return new CubicKLMBench(285.625f, 499.687f, 411.625f, 808.188f,
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1064.62f, 135.688f, 1042.63f, 585.187f); )
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DEF_BENCH( return new CubicKLMBench(635.625f, 614.687f, 171.625f, 236.188f,
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1064.62f, 135.688f, 516.625f, 570.187f); )
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#endif
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