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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkCanvas.h"
#include "SkPath.h"
#include "SkShadowTessellator.h"
#include "SkShadowUtils.h"
#include "SkVertices.h"
#include "Test.h"
void tessellate_shadow(skiatest::Reporter* reporter, const SkPath& path, const SkMatrix& ctm,
bool expectSuccess) {
static constexpr SkScalar kRadius = 2.f;
static constexpr SkColor kUmbraColor = 0xFFFFFFFF;
static constexpr SkColor kPenumbraColor = 0x20202020;
auto verts =
SkShadowTessellator::MakeAmbient(path, ctm, kRadius, kUmbraColor, kPenumbraColor, true);
if (expectSuccess != SkToBool(verts)) {
ERRORF(reporter, "Expected shadow tessellation to %s but it did not.",
expectSuccess ? "succeed" : "fail");
}
verts = SkShadowTessellator::MakeAmbient(path, ctm, kRadius, kUmbraColor, kPenumbraColor,
false);
if (expectSuccess != SkToBool(verts)) {
ERRORF(reporter, "Expected shadow tessellation to %s but it did not.",
expectSuccess ? "succeed" : "fail");
}
verts = SkShadowTessellator::MakeSpot(path, ctm, 1.5f, {0, 0}, kRadius, kUmbraColor,
kPenumbraColor, false);
if (expectSuccess != SkToBool(verts)) {
ERRORF(reporter, "Expected shadow tessellation to %s but it did not.",
expectSuccess ? "succeed" : "fail");
}
verts = SkShadowTessellator::MakeSpot(path, ctm, 1.5f, {0, 0}, kRadius, kUmbraColor,
kPenumbraColor, true);
if (expectSuccess != SkToBool(verts)) {
ERRORF(reporter, "Expected shadow tessellation to %s but it did not.",
expectSuccess ? "succeed" : "fail");
}
}
DEF_TEST(ShadowUtils, reporter) {
SkCanvas canvas(100, 100);
// Currently SkShadowUtils doesn't really support cubics when compiled without SK_SUPPORT_GPU.
// However, this should now not crash.
SkPath path;
path.cubicTo(100, 50, 20, 100, 0, 0);
tessellate_shadow(reporter, path, canvas.getTotalMatrix(), (bool)SK_SUPPORT_GPU);
// This line segment has no area and no shadow.
path.reset();
path.lineTo(10.f, 10.f);
tessellate_shadow(reporter, path, canvas.getTotalMatrix(), false);
// A series of colinear line segments
path.reset();
for (int i = 0; i < 10; ++i) {
path.lineTo((SkScalar)i, (SkScalar)i);
}
tessellate_shadow(reporter, path, canvas.getTotalMatrix(), false);
}
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