| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrTestUtils_DEFINED |
| #define GrTestUtils_DEFINED |
| |
| #include "SkTypes.h" |
| |
| #ifdef GR_TEST_UTILS |
| |
| #include "GrColor.h" |
| #include "SkPathEffect.h" |
| #include "SkRandom.h" |
| #include "SkStrokeRec.h" |
| #include "../private/SkTemplates.h" |
| |
| class GrStyle; |
| class SkMatrix; |
| class SkPath; |
| class SkRRect; |
| struct SkRect; |
| |
| namespace GrTest { |
| /** |
| * Helpers for use in Test functions. |
| */ |
| const SkMatrix& TestMatrix(SkRandom*); |
| const SkMatrix& TestMatrixPreservesRightAngles(SkRandom*); |
| const SkMatrix& TestMatrixRectStaysRect(SkRandom*); |
| const SkMatrix& TestMatrixInvertible(SkRandom*); |
| const SkMatrix& TestMatrixPerspective(SkRandom*); |
| const SkRect& TestRect(SkRandom*); |
| const SkRect& TestSquare(SkRandom*); |
| const SkRRect& TestRRectSimple(SkRandom*); |
| const SkPath& TestPath(SkRandom*); |
| const SkPath& TestPathConvex(SkRandom*); |
| SkStrokeRec TestStrokeRec(SkRandom*); |
| /** Creates styles with dash path effects and null path effects */ |
| void TestStyle(SkRandom*, GrStyle*); |
| |
| // We have a simplified dash path effect here to avoid relying on SkDashPathEffect which |
| // is in the optional build target effects. |
| class TestDashPathEffect : public SkPathEffect { |
| public: |
| static sk_sp<SkPathEffect> Make(const SkScalar* intervals, int count, SkScalar phase) { |
| return sk_sp<SkPathEffect>(new TestDashPathEffect(intervals, count, phase)); |
| } |
| |
| bool filterPath(SkPath* dst, const SkPath&, SkStrokeRec* , const SkRect*) const override; |
| DashType asADash(DashInfo* info) const override; |
| Factory getFactory() const override { return nullptr; } |
| void toString(SkString*) const override {} |
| |
| private: |
| TestDashPathEffect(const SkScalar* intervals, int count, SkScalar phase); |
| |
| int fCount; |
| SkAutoTArray<SkScalar> fIntervals; |
| SkScalar fPhase; |
| SkScalar fInitialDashLength; |
| int fInitialDashIndex; |
| SkScalar fIntervalLength; |
| }; |
| |
| } // namespace GrTest |
| |
| static inline GrColor GrRandomColor(SkRandom* random) { |
| // There are only a few cases of random colors which interest us |
| enum ColorMode { |
| kAllOnes_ColorMode, |
| kAllZeros_ColorMode, |
| kAlphaOne_ColorMode, |
| kRandom_ColorMode, |
| kLast_ColorMode = kRandom_ColorMode |
| }; |
| |
| ColorMode colorMode = ColorMode(random->nextULessThan(kLast_ColorMode + 1)); |
| GrColor color SK_INIT_TO_AVOID_WARNING; |
| switch (colorMode) { |
| case kAllOnes_ColorMode: |
| color = GrColorPackRGBA(0xFF, 0xFF, 0xFF, 0xFF); |
| break; |
| case kAllZeros_ColorMode: |
| color = GrColorPackRGBA(0, 0, 0, 0); |
| break; |
| case kAlphaOne_ColorMode: |
| color = GrColorPackRGBA(random->nextULessThan(256), |
| random->nextULessThan(256), |
| random->nextULessThan(256), |
| 0xFF); |
| break; |
| case kRandom_ColorMode: { |
| uint8_t alpha = random->nextULessThan(256); |
| color = GrColorPackRGBA(random->nextRangeU(0, alpha), |
| random->nextRangeU(0, alpha), |
| random->nextRangeU(0, alpha), |
| alpha); |
| break; |
| } |
| } |
| GrColorIsPMAssert(color); |
| return color; |
| } |
| |
| static inline uint8_t GrRandomCoverage(SkRandom* random) { |
| enum CoverageMode { |
| kZero_CoverageMode, |
| kAllOnes_CoverageMode, |
| kRandom_CoverageMode, |
| kLast_CoverageMode = kRandom_CoverageMode |
| }; |
| |
| CoverageMode colorMode = CoverageMode(random->nextULessThan(kLast_CoverageMode + 1)); |
| uint8_t coverage SK_INIT_TO_AVOID_WARNING; |
| switch (colorMode) { |
| case kZero_CoverageMode: |
| coverage = 0; |
| break; |
| case kAllOnes_CoverageMode: |
| coverage = 0xff; |
| break; |
| case kRandom_CoverageMode: |
| coverage = random->nextULessThan(256); |
| break; |
| } |
| return coverage; |
| } |
| |
| #endif |
| #endif |