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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 "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 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
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