58f4e1d2fd
Don't pass rand() to a function as a pair of parameters, since the order of evaluation is unknown TBR=robertphillips@google.com GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1682203002 Review URL: https://codereview.chromium.org/1682203002
190 lines
7.0 KiB
C++
190 lines
7.0 KiB
C++
/*
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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 BD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkParsePath.h"
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#include "SkPath.h"
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/*
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The arcto test below should draw the same as this SVG:
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(Note that Skia's arcTo Direction parameter value is opposite SVG's sweep value, e.g. 0 / 1)
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<svg width="500" height="600">
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<path d="M 50,100 A50,50, 0,0,1, 150,200" style="stroke:#660000; fill:none; stroke-width:2" />
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<path d="M100,100 A50,100, 0,0,1, 200,200" style="stroke:#660000; fill:none; stroke-width:2" />
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<path d="M150,100 A50,50, 45,0,1, 250,200" style="stroke:#660000; fill:none; stroke-width:2" />
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<path d="M200,100 A50,100, 45,0,1, 300,200" style="stroke:#660000; fill:none; stroke-width:2" />
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<path d="M150,200 A50,50, 0,1,0, 150,300" style="stroke:#660000; fill:none; stroke-width:2" />
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<path d="M200,200 A50,100, 0,1,0, 200,300" style="stroke:#660000; fill:none; stroke-width:2" />
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<path d="M250,200 A50,50, 45,1,0, 250,300" style="stroke:#660000; fill:none; stroke-width:2" />
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<path d="M300,200 A50,100, 45,1,0, 300,300" style="stroke:#660000; fill:none; stroke-width:2" />
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<path d="M250,400 A120,80 0 0,0 250,500"
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fill="none" stroke="red" stroke-width="5" />
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<path d="M250,400 A120,80 0 1,1 250,500"
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fill="none" stroke="green" stroke-width="5"/>
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<path d="M250,400 A120,80 0 1,0 250,500"
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fill="none" stroke="purple" stroke-width="5"/>
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<path d="M250,400 A120,80 0 0,1 250,500"
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fill="none" stroke="blue" stroke-width="5"/>
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<path d="M100,100 A 0, 0 0 0,1 200,200"
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fill="none" stroke="blue" stroke-width="5" stroke-linecap="round"/>
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<path d="M200,100 A 80,80 0 0,1 200,100"
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fill="none" stroke="blue" stroke-width="5" stroke-linecap="round"/>
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</svg>
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*/
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DEF_SIMPLE_GM(arcto, canvas, 500, 600) {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(2);
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paint.setColor(0xFF660000);
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// canvas->scale(2, 2); // for testing on retina
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SkRect oval = SkRect::MakeXYWH(100, 100, 100, 100);
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SkPath svgArc;
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for (int angle = 0; angle <= 45; angle += 45) {
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for (int oHeight = 2; oHeight >= 1; --oHeight) {
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SkScalar ovalHeight = oval.height() / oHeight;
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svgArc.moveTo(oval.fLeft, oval.fTop);
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svgArc.arcTo(oval.width() / 2, ovalHeight, SkIntToScalar(angle), SkPath::kSmall_ArcSize,
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SkPath::kCW_Direction, oval.right(), oval.bottom());
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canvas->drawPath(svgArc, paint);
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svgArc.reset();
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svgArc.moveTo(oval.fLeft + 100, oval.fTop + 100);
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svgArc.arcTo(oval.width() / 2, ovalHeight, SkIntToScalar(angle), SkPath::kLarge_ArcSize,
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SkPath::kCCW_Direction, oval.right(), oval.bottom() + 100);
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canvas->drawPath(svgArc, paint);
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oval.offset(50, 0);
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svgArc.reset();
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}
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}
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paint.setStrokeWidth(5);
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const SkColor purple = 0xFF800080;
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const SkColor darkgreen = 0xFF008000;
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const SkColor colors[] = { SK_ColorRED, darkgreen, purple, SK_ColorBLUE };
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const char* arcstrs[] = {
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"M250,400 A120,80 0 0,0 250,500",
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"M250,400 A120,80 0 1,1 250,500",
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"M250,400 A120,80 0 1,0 250,500",
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"M250,400 A120,80 0 0,1 250,500"
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};
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int cIndex = 0;
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for (const char* arcstr : arcstrs) {
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SkParsePath::FromSVGString(arcstr, &svgArc);
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paint.setColor(colors[cIndex++]);
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canvas->drawPath(svgArc, paint);
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}
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// test that zero length arcs still draw round cap
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paint.setStrokeCap(SkPaint::kRound_Cap);
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SkPath path;
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path.moveTo(100, 100);
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path.arcTo(0, 0, 0, SkPath::kLarge_ArcSize, SkPath::kCW_Direction, 200, 200);
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canvas->drawPath(path, paint);
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path.reset();
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path.moveTo(200, 100);
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path.arcTo(80, 80, 0, SkPath::kLarge_ArcSize, SkPath::kCW_Direction, 200, 100);
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canvas->drawPath(path, paint);
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}
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#include "random_parse_path.h"
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#include "SkRandom.h"
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/* The test below generates a reference image using SVG. To compare the result for correctness,
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enable the define below and then view the generated SVG in a browser.
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*/
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#define GENERATE_SVG_REFERENCE 01
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#if GENERATE_SVG_REFERENCE
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#include "SkOSFile.h"
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#endif
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enum {
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kParsePathTestDimension = 500
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};
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DEF_SIMPLE_GM(parsedpaths, canvas, kParsePathTestDimension, kParsePathTestDimension) {
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#if GENERATE_SVG_REFERENCE
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FILE* file = sk_fopen("svgout.htm", kWrite_SkFILE_Flag);
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SkString str;
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str.printf("<svg width=\"%d\" height=\"%d\">\n", kParsePathTestDimension,
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kParsePathTestDimension);
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sk_fwrite(str.c_str(), str.size(), file);
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#endif
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SkRandom rand;
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SkPaint paint;
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paint.setAntiAlias(true);
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for (int xStart = 0; xStart < kParsePathTestDimension; xStart += 100) {
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canvas->save();
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for (int yStart = 0; yStart < kParsePathTestDimension; yStart += 100) {
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#if GENERATE_SVG_REFERENCE
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str.printf("<g transform='translate(%d,%d) scale(%d,%d)'>\n", xStart, yStart,
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1, 1);
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sk_fwrite(str.c_str(), str.size(), file);
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str.printf("<clipPath id='clip_%d_%d'>\n", xStart, yStart);
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sk_fwrite(str.c_str(), str.size(), file);
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str.printf("<rect width='100' height='100' x='0' y='0'></rect>\n");
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sk_fwrite(str.c_str(), str.size(), file);
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str.printf("</clipPath>\n");
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sk_fwrite(str.c_str(), str.size(), file);
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#endif
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int count = 3;
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do {
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SkPath path;
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SkString spec;
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uint32_t y = rand.nextRangeU(30, 70);
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uint32_t x = rand.nextRangeU(30, 70);
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spec.printf("M %d,%d\n", x, y);
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uint32_t count = rand.nextRangeU(0, 10);
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for (uint32_t i = 0; i < count; ++i) {
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spec.append(MakeRandomParsePathPiece(&rand));
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}
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SkAssertResult(SkParsePath::FromSVGString(spec.c_str(), &path));
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paint.setColor(rand.nextU());
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canvas->save();
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canvas->clipRect(SkRect::MakeIWH(100, 100));
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canvas->drawPath(path, paint);
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canvas->restore();
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#if GENERATE_SVG_REFERENCE
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str.printf("<path d='\n");
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sk_fwrite(str.c_str(), str.size(), file);
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sk_fwrite(spec.c_str(), spec.size(), file);
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str.printf("\n' fill='#%06x' fill-opacity='%g'", paint.getColor() & 0xFFFFFF,
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paint.getAlpha() / 255.f);
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sk_fwrite(str.c_str(), str.size(), file);
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str.printf(" clip-path='url(#clip_%d_%d)'/>\n", xStart, yStart);
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sk_fwrite(str.c_str(), str.size(), file);
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#endif
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} while (--count > 0);
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#if GENERATE_SVG_REFERENCE
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str.printf("</g>\n");
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sk_fwrite(str.c_str(), str.size(), file);
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#endif
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canvas->translate(0, 100);
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}
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canvas->restore();
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canvas->translate(100, 0);
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}
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#if GENERATE_SVG_REFERENCE
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const char trailer[] = "</svg>\n";
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sk_fwrite(trailer, sizeof(trailer) - 1, file);
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sk_fclose(file);
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#endif
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}
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