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98 lines
2.7 KiB
98 lines
2.7 KiB
4 months ago
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/*
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* Copyright 2016 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 "SkRandom.h"
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#include "random_parse_path.h"
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const struct Legal {
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char fSymbol;
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int fScalars;
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} gLegal[] = {
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{ 'M', 2 },
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{ 'H', 1 },
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{ 'V', 1 },
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{ 'L', 2 },
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{ 'Q', 4 },
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{ 'T', 2 },
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{ 'C', 6 },
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{ 'S', 4 },
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{ 'A', 4 },
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{ 'Z', 0 },
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};
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bool gEasy = false; // set to true while debugging to suppress unusual whitespace
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// mostly do nothing, then bias towards spaces
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const char gWhiteSpace[] = { 0, 0, 0, 0, 0, 0, 0, 0, ' ', ' ', ' ', ' ', 0x09, 0x0D, 0x0A };
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static void add_white(SkRandom* rand, SkString* atom) {
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if (gEasy) {
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atom->append(" ");
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return;
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}
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int reps = rand->nextRangeU(0, 2);
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for (int rep = 0; rep < reps; ++rep) {
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int index = rand->nextRangeU(0, (int) SK_ARRAY_COUNT(gWhiteSpace) - 1);
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if (gWhiteSpace[index]) {
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atom->append(&gWhiteSpace[index], 1);
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}
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}
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}
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static void add_comma(SkRandom* rand, SkString* atom) {
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if (gEasy) {
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atom->append(",");
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return;
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}
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size_t count = atom->size();
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add_white(rand, atom);
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if (rand->nextBool()) {
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atom->append(",");
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}
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do {
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add_white(rand, atom);
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} while (count == atom->size());
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}
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static void add_some_white(SkRandom* rand, SkString* atom) {
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size_t count = atom->size();
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do {
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add_white(rand, atom);
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} while (count == atom->size());
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}
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SkString MakeRandomParsePathPiece(SkRandom* rand) {
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SkString atom;
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int index = rand->nextRangeU(0, (int) SK_ARRAY_COUNT(gLegal) - 1);
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const Legal& legal = gLegal[index];
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gEasy ? atom.append("\n") : add_white(rand, &atom);
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char symbol = legal.fSymbol | (rand->nextBool() ? 0x20 : 0);
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atom.append(&symbol, 1);
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int reps = rand->nextRangeU(1, 3);
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for (int rep = 0; rep < reps; ++rep) {
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for (int index = 0; index < legal.fScalars; ++index) {
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SkScalar coord = rand->nextRangeF(0, 100);
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add_white(rand, &atom);
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atom.appendScalar(coord);
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if (rep < reps - 1 && index < legal.fScalars - 1) {
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add_comma(rand, &atom);
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} else {
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add_some_white(rand, &atom);
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}
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if ('A' == legal.fSymbol && 1 == index) {
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atom.appendScalar(rand->nextRangeF(-720, 720));
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add_comma(rand, &atom);
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atom.appendU32(rand->nextRangeU(0, 1));
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add_comma(rand, &atom);
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atom.appendU32(rand->nextRangeU(0, 1));
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add_comma(rand, &atom);
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}
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}
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}
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return atom;
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}
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