Home | History | Annotate | Download | only in tests 
      1 /*
      2  * Copyright 2017 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 "SkCanvas.h"
      9 #include "SkPath.h"
     10 #include "SkShadowTessellator.h"
     11 #include "SkShadowUtils.h"
     12 #include "SkVertices.h"
     13 #include "Test.h"
     14 
     15 void tessellate_shadow(skiatest::Reporter* reporter, const SkPath& path, const SkMatrix& ctm,
     16                        bool expectSuccess) {
     17 
     18     auto heightParams = SkPoint3::Make(0, 0, 4);
     19 
     20     auto verts = SkShadowTessellator::MakeAmbient(path, ctm, heightParams, true);
     21     if (expectSuccess != SkToBool(verts)) {
     22         ERRORF(reporter, "Expected shadow tessellation to %s but it did not.",
     23                expectSuccess ? "succeed" : "fail");
     24     }
     25     verts = SkShadowTessellator::MakeAmbient(path, ctm, heightParams, false);
     26     if (expectSuccess != SkToBool(verts)) {
     27         ERRORF(reporter, "Expected shadow tessellation to %s but it did not.",
     28                expectSuccess ? "succeed" : "fail");
     29     }
     30     verts = SkShadowTessellator::MakeSpot(path, ctm, heightParams, {0, 0, 128}, 128.f, false);
     31     if (expectSuccess != SkToBool(verts)) {
     32         ERRORF(reporter, "Expected shadow tessellation to %s but it did not.",
     33                expectSuccess ? "succeed" : "fail");
     34     }
     35     verts = SkShadowTessellator::MakeSpot(path, ctm, heightParams, {0, 0, 128}, 128.f, false);
     36     if (expectSuccess != SkToBool(verts)) {
     37         ERRORF(reporter, "Expected shadow tessellation to %s but it did not.",
     38                expectSuccess ? "succeed" : "fail");
     39     }
     40 }
     41 
     42 DEF_TEST(ShadowUtils, reporter) {
     43     SkCanvas canvas(100, 100);
     44 
     45     SkPath path;
     46     path.cubicTo(100, 50, 20, 100, 0, 0);
     47     tessellate_shadow(reporter, path, canvas.getTotalMatrix(), true);
     48 
     49     // This line segment has no area and no shadow.
     50     path.reset();
     51     path.lineTo(10.f, 10.f);
     52     tessellate_shadow(reporter, path, canvas.getTotalMatrix(), false);
     53 
     54     // A series of colinear line segments
     55     path.reset();
     56     for (int i = 0; i < 10; ++i) {
     57         path.lineTo((SkScalar)i, (SkScalar)i);
     58     }
     59     tessellate_shadow(reporter, path, canvas.getTotalMatrix(), false);
     60 }
     61