/* * Copyright 2016 Google Inc. * * Use of this source code is governed by a BD-style license that can be * found in the LICENSE file. */ #include "gm/gm.h" #include "include/core/SkCanvas.h" #include "include/core/SkColor.h" #include "include/core/SkPaint.h" #include "include/core/SkPathBuilder.h" #include "include/core/SkPathEffect.h" #include "include/core/SkPathMeasure.h" #include "include/core/SkRect.h" #include "include/core/SkScalar.h" #include "include/core/SkString.h" #include "include/core/SkTypes.h" #include "include/effects/SkDashPathEffect.h" #include "include/utils/SkParsePath.h" #include "include/utils/SkRandom.h" #include "src/core/SkOSFile.h" #include "tools/random_parse_path.h" #include <stdio.h> /* The test below generates a reference image using SVG. To compare the result for correctness, enable the define below and then view the generated SVG in a browser. */ static constexpr bool GENERATE_SVG_REFERENCE = false; /* The arcto test below should draw the same as this SVG: (Note that Skia's arcTo Direction parameter value is opposite SVG's sweep value, e.g. 0 / 1) <svg width="500" height="600"> <path d="M 50,100 A50,50, 0,0,1, 150,200" style="stroke:#660000; fill:none; stroke-width:2" /> <path d="M100,100 A50,100, 0,0,1, 200,200" style="stroke:#660000; fill:none; stroke-width:2" /> <path d="M150,100 A50,50, 45,0,1, 250,200" style="stroke:#660000; fill:none; stroke-width:2" /> <path d="M200,100 A50,100, 45,0,1, 300,200" style="stroke:#660000; fill:none; stroke-width:2" /> <path d="M150,200 A50,50, 0,1,0, 150,300" style="stroke:#660000; fill:none; stroke-width:2" /> <path d="M200,200 A50,100, 0,1,0, 200,300" style="stroke:#660000; fill:none; stroke-width:2" /> <path d="M250,200 A50,50, 45,1,0, 250,300" style="stroke:#660000; fill:none; stroke-width:2" /> <path d="M300,200 A50,100, 45,1,0, 300,300" style="stroke:#660000; fill:none; stroke-width:2" /> <path d="M250,400 A120,80 0 0,0 250,500" fill="none" stroke="red" stroke-width="5" /> <path d="M250,400 A120,80 0 1,1 250,500" fill="none" stroke="green" stroke-width="5"/> <path d="M250,400 A120,80 0 1,0 250,500" fill="none" stroke="purple" stroke-width="5"/> <path d="M250,400 A120,80 0 0,1 250,500" fill="none" stroke="blue" stroke-width="5"/> <path d="M100,100 A 0, 0 0 0,1 200,200" fill="none" stroke="blue" stroke-width="5" stroke-linecap="round"/> <path d="M200,100 A 80,80 0 0,1 200,100" fill="none" stroke="blue" stroke-width="5" stroke-linecap="round"/> </svg> */ DEF_SIMPLE_GM(arcto, canvas, 500, 600) { SkPaint paint; paint.setAntiAlias(true); paint.setStyle(SkPaint::kStroke_Style); paint.setStrokeWidth(2); paint.setColor(0xFF660000); // canvas->scale(2, 2); // for testing on retina SkRect oval = SkRect::MakeXYWH(100, 100, 100, 100); for (SkScalar angle = 0; angle <= 45; angle += 45) { for (int oHeight = 2; oHeight >= 1; --oHeight) { SkPathBuilder svgArc; SkScalar ovalHeight = oval.height() / oHeight; svgArc.moveTo(oval.fLeft, oval.fTop); svgArc.arcTo({oval.width() / 2, ovalHeight}, angle, SkPathBuilder::kSmall_ArcSize, SkPathDirection::kCW, {oval.right(), oval.bottom()}); canvas->drawPath(svgArc.detach(), paint); svgArc.moveTo(oval.fLeft + 100, oval.fTop + 100); svgArc.arcTo({oval.width() / 2, ovalHeight}, angle, SkPathBuilder::kLarge_ArcSize, SkPathDirection::kCCW, {oval.right(), oval.bottom() + 100}); canvas->drawPath(svgArc.detach(), paint); oval.offset(50, 0); } } paint.setStrokeWidth(5); const SkColor purple = 0xFF800080; const SkColor darkgreen = 0xFF008000; const SkColor colors[] = { SK_ColorRED, darkgreen, purple, SK_ColorBLUE }; const char* arcstrs[] = { "M250,400 A120,80 0 0,0 250,500", "M250,400 A120,80 0 1,1 250,500", "M250,400 A120,80 0 1,0 250,500", "M250,400 A120,80 0 0,1 250,500" }; int cIndex = 0; for (const char* arcstr : arcstrs) { SkPath path; SkParsePath::FromSVGString(arcstr, &path); paint.setColor(colors[cIndex++]); canvas->drawPath(path, paint); } // test that zero length arcs still draw round cap paint.setStrokeCap(SkPaint::kRound_Cap); SkPathBuilder path; path.moveTo(100, 100) .arcTo({0, 0}, 0, SkPathBuilder::kLarge_ArcSize, SkPathDirection::kCW, {200, 200}); canvas->drawPath(path.detach(), paint); path.moveTo(200, 100) .arcTo({80, 80}, 0, SkPathBuilder::kLarge_ArcSize, SkPathDirection::kCW, {200, 100}); canvas->drawPath(path.detach(), paint); } enum { kParsePathTestDimension = 500 }; DEF_SIMPLE_GM(parsedpaths, canvas, kParsePathTestDimension, kParsePathTestDimension) { SkString str; FILE* file; if (GENERATE_SVG_REFERENCE) { file = sk_fopen("svgout.htm", kWrite_SkFILE_Flag); str.printf("<svg width=\"%d\" height=\"%d\">\n", kParsePathTestDimension, kParsePathTestDimension); sk_fwrite(str.c_str(), str.size(), file); } SkRandom rand; SkPaint paint; paint.setAntiAlias(true); for (int xStart = 0; xStart < kParsePathTestDimension; xStart += 100) { canvas->save(); for (int yStart = 0; yStart < kParsePathTestDimension; yStart += 100) { if (GENERATE_SVG_REFERENCE) { str.printf("<g transform='translate(%d,%d) scale(%d,%d)'>\n", xStart, yStart, 1, 1); sk_fwrite(str.c_str(), str.size(), file); str.printf("<clipPath id='clip_%d_%d'>\n", xStart, yStart); sk_fwrite(str.c_str(), str.size(), file); str.printf("<rect width='100' height='100' x='0' y='0'></rect>\n"); sk_fwrite(str.c_str(), str.size(), file); str.printf("</clipPath>\n"); sk_fwrite(str.c_str(), str.size(), file); } int count = 3; do { SkPath path; SkString spec; uint32_t y = rand.nextRangeU(30, 70); uint32_t x = rand.nextRangeU(30, 70); spec.printf("M %d,%d\n", x, y); uint32_t count = rand.nextRangeU(0, 10); for (uint32_t i = 0; i < count; ++i) { spec.append(MakeRandomParsePathPiece(&rand)); } SkAssertResult(SkParsePath::FromSVGString(spec.c_str(), &path)); paint.setColor(rand.nextU()); canvas->save(); canvas->clipRect(SkRect::MakeIWH(100, 100)); canvas->drawPath(path, paint); canvas->restore(); if (GENERATE_SVG_REFERENCE) { str.printf("<path d='\n"); sk_fwrite(str.c_str(), str.size(), file); sk_fwrite(spec.c_str(), spec.size(), file); str.printf("\n' fill='#%06x' fill-opacity='%g'", paint.getColor() & 0xFFFFFF, paint.getAlpha() / 255.f); sk_fwrite(str.c_str(), str.size(), file); str.printf(" clip-path='url(#clip_%d_%d)'/>\n", xStart, yStart); sk_fwrite(str.c_str(), str.size(), file); } } while (--count > 0); if (GENERATE_SVG_REFERENCE) { str.printf("</g>\n"); sk_fwrite(str.c_str(), str.size(), file); } canvas->translate(0, 100); } canvas->restore(); canvas->translate(100, 0); } if (GENERATE_SVG_REFERENCE) { const char trailer[] = "</svg>\n"; sk_fwrite(trailer, sizeof(trailer) - 1, file); sk_fclose(file); } } DEF_SIMPLE_GM(bug593049, canvas, 300, 300) { canvas->translate(111, 0); SkPathBuilder p; p.moveTo(-43.44464063610148f, 79.43535936389853f); const SkScalar yOffset = 122.88f; const SkScalar radius = 61.44f; SkRect oval = SkRect::MakeXYWH(-radius, yOffset - radius, 2 * radius, 2 * radius); p.arcTo(oval, 1.25f * 180, .5f * 180, false); SkPaint paint; paint.setStyle(SkPaint::kStroke_Style); paint.setStrokeCap(SkPaint::kRound_Cap); paint.setStrokeWidth(15.36f); canvas->drawPath(p.detach(), paint); } DEF_SIMPLE_GM(bug583299, canvas, 300, 300) { const char* d="M60,60 A50,50 0 0 0 160,60 A50,50 0 0 0 60,60z"; SkPaint p; p.setStyle(SkPaint::kStroke_Style); p.setStrokeWidth(100); p.setAntiAlias(true); p.setColor(0xFF008200); p.setStrokeCap(SkPaint::kSquare_Cap); SkPath path; SkParsePath::FromSVGString(d, &path); SkPathMeasure meas(path, false); SkScalar length = meas.getLength(); SkScalar intervals[] = {0, length }; int intervalCount = (int) SK_ARRAY_COUNT(intervals); p.setPathEffect(SkDashPathEffect::Make(intervals, intervalCount, 0)); canvas->drawPath(path, p); }