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      1 /*
      2  * Copyright 2013 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "SkTypes.h"
      9 
     10 #if SK_SUPPORT_GPU
     11 
     12 #include "GrContext.h"
     13 #include "GrPath.h"
     14 #include "GrStrokeInfo.h"
     15 #include "SkBitmap.h"
     16 #include "SkCanvas.h"
     17 #include "SkColor.h"
     18 #include "SkPaint.h"
     19 #include "SkPath.h"
     20 #include "SkDashPathEffect.h"
     21 #include "SkRRect.h"
     22 #include "SkRect.h"
     23 #include "SkSurface.h"
     24 #include "Test.h"
     25 
     26 #include <initializer_list>
     27 
     28 static void test_drawPathEmpty(skiatest::Reporter*, SkCanvas* canvas) {
     29     // Filling an empty path should not crash.
     30     SkPaint paint;
     31     SkRect emptyRect = SkRect::MakeEmpty();
     32     canvas->drawRect(emptyRect, paint);
     33     canvas->drawPath(SkPath(), paint);
     34     canvas->drawOval(emptyRect, paint);
     35     canvas->drawRect(emptyRect, paint);
     36     canvas->drawRRect(SkRRect::MakeRect(emptyRect), paint);
     37 
     38     // Stroking an empty path should not crash.
     39     paint.setAntiAlias(true);
     40     paint.setStyle(SkPaint::kStroke_Style);
     41     paint.setColor(SK_ColorGRAY);
     42     paint.setStrokeWidth(SkIntToScalar(20));
     43     paint.setStrokeJoin(SkPaint::kRound_Join);
     44     canvas->drawRect(emptyRect, paint);
     45     canvas->drawPath(SkPath(), paint);
     46     canvas->drawOval(emptyRect, paint);
     47     canvas->drawRect(emptyRect, paint);
     48     canvas->drawRRect(SkRRect::MakeRect(emptyRect), paint);
     49 }
     50 
     51 static void fill_and_stroke(SkCanvas* canvas, const SkPath& p1, const SkPath& p2,
     52                             SkPathEffect* effect) {
     53     SkPaint paint;
     54     paint.setAntiAlias(true);
     55     paint.setPathEffect(effect);
     56 
     57     canvas->drawPath(p1, paint);
     58     canvas->drawPath(p2, paint);
     59 
     60     paint.setStyle(SkPaint::kStroke_Style);
     61     canvas->drawPath(p1, paint);
     62     canvas->drawPath(p2, paint);
     63 }
     64 
     65 static void test_drawSameRectOvals(skiatest::Reporter*, SkCanvas* canvas) {
     66     // Drawing ovals with similar bounds but different points order should not crash.
     67 
     68     SkPath oval1, oval2;
     69     const SkRect rect = SkRect::MakeWH(100, 50);
     70     oval1.addOval(rect, SkPath::kCW_Direction);
     71     oval2.addOval(rect, SkPath::kCCW_Direction);
     72 
     73     fill_and_stroke(canvas, oval1, oval2, nullptr);
     74 
     75     const SkScalar intervals[] = { 1, 1 };
     76     SkAutoTUnref<SkPathEffect> dashEffect(SkDashPathEffect::Create(intervals, 2, 0));
     77     fill_and_stroke(canvas, oval1, oval2, dashEffect);
     78 }
     79 
     80 DEF_GPUTEST_FOR_ALL_CONTEXTS(GpuDrawPath, reporter, context) {
     81     for (auto& test_func : { &test_drawPathEmpty, &test_drawSameRectOvals }) {
     82         for (auto& sampleCount : {0, 4, 16}) {
     83             SkImageInfo info = SkImageInfo::MakeN32Premul(255, 255);
     84             SkAutoTUnref<SkSurface> surface(
     85                 SkSurface::NewRenderTarget(context, SkBudgeted::kNo, info,
     86                                            sampleCount, nullptr));
     87             if (!surface) {
     88                 continue;
     89             }
     90             test_func(reporter, surface->getCanvas());
     91         }
     92     }
     93 }
     94 
     95 DEF_GPUTEST(GrPathKeys, reporter, /*factory*/) {
     96     // Keys should not ignore conic weights.
     97     SkPath path1, path2;
     98     path1.setIsVolatile(true);
     99     path2.setIsVolatile(true);
    100     SkPoint p0 = SkPoint::Make(100, 0);
    101     SkPoint p1 = SkPoint::Make(100, 100);
    102 
    103     path1.conicTo(p0, p1, .5f);
    104     path2.conicTo(p0, p1, .7f);
    105 
    106     bool isVolatile;
    107     GrUniqueKey key1, key2;
    108     GrStrokeInfo stroke(SkStrokeRec::kFill_InitStyle);
    109     GrPath::ComputeKey(path1, stroke, &key1, &isVolatile);
    110     GrPath::ComputeKey(path2, stroke, &key2, &isVolatile);
    111     REPORTER_ASSERT(reporter, key1 != key2);
    112 }
    113 
    114 #endif
    115