GrTestUtils.h

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/*
 * 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 "include/core/SkTypes.h"
 
#if defined(GR_TEST_UTILS)
 
#include "include/core/SkStrokeRec.h"
#include "include/core/SkSurfaceProps.h"
#include "include/private/base/SkMacros.h"
#include "include/private/base/SkTemplates.h"
#include "src/base/SkRandom.h"
#include "src/core/SkPathEffectBase.h"
#include "src/gpu/ganesh/GrColor.h"
#include "src/gpu/ganesh/GrFPArgs.h"
#include "src/gpu/ganesh/GrSamplerState.h"
#include "src/shaders/SkShaderBase.h"
 
class GrColorInfo;
class GrColorSpaceXform;
class GrProcessorTestData;
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*);
void TestWrapModes(SkRandom*, GrSamplerState::WrapMode[2]);
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*);
sk_sp<SkColorSpace> TestColorSpace(SkRandom*);
sk_sp<GrColorSpaceXform> TestColorXform(SkRandom*);
 
GrColor RandomColor(SkRandom* random);
uint8_t RandomCoverage(SkRandom* random);
 
class TestAsFPArgs {
public:
    TestAsFPArgs(GrProcessorTestData*);
    ~TestAsFPArgs();
    const GrFPArgs& args() const { return fArgs; }
 
private:
    std::unique_ptr<GrColorInfo> fColorInfoStorage;
    SkSurfaceProps fSurfaceProps;
    GrFPArgs fArgs;
};
 
// We have a simplified dash path effect here to avoid relying on SkDashPathEffect which
// is in the optional build target effects.
class TestDashPathEffect : public SkPathEffectBase {
public:
    static sk_sp<SkPathEffect> Make(const SkScalar* intervals, int count, SkScalar phase) {
        return sk_sp<SkPathEffect>(new TestDashPathEffect(intervals, count, phase));
    }
 
    Factory getFactory() const override { return nullptr; }
    const char* getTypeName() const override { return nullptr; }
 
protected:
    bool onFilterPath(SkPath* dst, const SkPath&, SkStrokeRec* , const SkRect*,
                      const SkMatrix&) const override;
    DashType onAsADash(DashInfo* info) const override;
 
private:
    TestDashPathEffect(const SkScalar* intervals, int count, SkScalar phase);
 
    bool computeFastBounds(SkRect* bounds) const override { return true; }
 
    int                                 fCount;
    skia_private::AutoTArray<SkScalar>  fIntervals;
    SkScalar                            fPhase;
    SkScalar                            fInitialDashLength;
    int                                 fInitialDashIndex;
    SkScalar                            fIntervalLength;
};
 
}  // namespace GrTest
 
#endif
#endif