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skia2/gm/gradients_2pt_conical.cpp
Yuqian Li 81d9f0d42e Add strip 2pt conical GM 
This is distilled from 82161 so we can first change the GMs of our
previous bots and then compare the same GM between the old algorithm
and the new one.

Bug: skia:
Change-Id: I4b13bb1a06d109b60c8e29f5f87adad47d0a811b
Reviewed-on: https://skia-review.googlesource.com/84523
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Yuqian Li <liyuqian@google.com>
2017-12-13 21:11:10 +00:00

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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "sk_tool_utils.h"
#include "SkGradientShader.h"
namespace skiagm {
struct GradData {
int fCount;
const SkColor* fColors;
const SkScalar* fPos;
};
constexpr SkColor gColors[] = {
SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK
};
constexpr SkScalar gPos0[] = { 0, SK_Scalar1 };
constexpr SkScalar gPos1[] = { SK_Scalar1/4, SK_Scalar1*3/4 };
constexpr SkScalar gPos2[] = {
0, SK_Scalar1/8, SK_Scalar1/2, SK_Scalar1*7/8, SK_Scalar1
};
constexpr SkScalar gPosClamp[] = {0.0f, 0.0f, 1.0f, 1.0f};
constexpr SkColor gColorClamp[] = {
SK_ColorRED, SK_ColorGREEN, SK_ColorGREEN, SK_ColorBLUE
};
constexpr GradData gGradData[] = {
{ 2, gColors, gPos0 },
{ 2, gColors, gPos1 },
{ 5, gColors, gPos2 },
{ 4, gColorClamp, gPosClamp }
};
static sk_sp<SkShader> Make2ConicalOutside(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = (pts[1].fX - pts[0].fX) / 10;
SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
data.fPos, data.fCount, tm, 0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalOutsideStrip(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius = (pts[1].fX - pts[0].fX) / 3;
center0.set(pts[0].fX, pts[0].fY);
center1.set(pts[1].fX, pts[1].fY);
return SkGradientShader::MakeTwoPointConical(center0, radius, center1, radius, data.fColors,
data.fPos, data.fCount, tm, 0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalOutsideFlip(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = (pts[1].fX - pts[0].fX) / 10;
SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
return SkGradientShader::MakeTwoPointConical(center1, radius1, center0, radius0, data.fColors,
data.fPos, data.fCount, tm, 0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalInside(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::MakeTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 7,
center0, (pts[1].fX - pts[0].fX) / 2,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalInsideFlip(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::MakeTwoPointConical(center0, (pts[1].fX - pts[0].fX) / 2,
center1, (pts[1].fX - pts[0].fX) / 7,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalInsideCenter(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::MakeTwoPointConical(center0, (pts[1].fX - pts[0].fX) / 7,
center0, (pts[1].fX - pts[0].fX) / 2,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalZeroRad(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::MakeTwoPointConical(center1, 0.f,
center0, (pts[1].fX - pts[0].fX) / 2,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalZeroRadFlip(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::MakeTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 2,
center0, 0.f,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalZeroRadCenter(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::MakeTwoPointConical(center0, 0.f, center0, (pts[1].fX - pts[0].fX) / 2,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalZeroRadOutside(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm,
const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = 0.f;
SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1,
data.fColors, data.fPos,
data.fCount, tm, 0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalZeroRadFlipOutside(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm,
const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = 0.f;
SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
return SkGradientShader::MakeTwoPointConical(center1, radius1, center0, radius0, data.fColors,
data.fPos, data.fCount, tm, 0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalEdgeX(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = (pts[1].fX - pts[0].fX) / 7;
SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX + radius1, center1.fY);
return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
data.fPos, data.fCount, tm, 0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalEdgeY(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = (pts[1].fX - pts[0].fX) / 7;
SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX, center1.fY + radius1);
return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
data.fPos, data.fCount, tm, 0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalZeroRadEdgeX(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm,
const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = 0.f;
SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX + radius1, center1.fY);
return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
data.fPos, data.fCount, tm, 0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalZeroRadEdgeY(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = 0.f;
SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX, center1.fY + radius1);
return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
data.fPos, data.fCount, tm, 0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalTouchX(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = (pts[1].fX - pts[0].fX) / 7;
SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX - radius1 + radius0, center1.fY);
return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
data.fPos, data.fCount, tm, 0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalTouchY(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
SkScalar radius0 = (pts[1].fX - pts[0].fX) / 7;
SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
center1.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center0.set(center1.fX, center1.fY + radius1 - radius0);
return SkGradientShader::MakeTwoPointConical(center0, radius0, center1, radius1, data.fColors,
data.fPos, data.fCount, tm, 0, &localMatrix);
}
static sk_sp<SkShader> Make2ConicalInsideSmallRad(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0, center1;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
return SkGradientShader::MakeTwoPointConical(center0, 0.0000000000000000001f,
center0, (pts[1].fX - pts[0].fX) / 2,
data.fColors, data.fPos, data.fCount, tm,
0, &localMatrix);
}
typedef sk_sp<SkShader> (*GradMaker)(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix);
constexpr GradMaker gGradMakersOutside[] = {
Make2ConicalOutside, Make2ConicalOutsideFlip,
Make2ConicalZeroRadOutside, Make2ConicalZeroRadFlipOutside,
Make2ConicalOutsideStrip
};
constexpr GradMaker gGradMakersInside[] = {
Make2ConicalInside, Make2ConicalInsideFlip, Make2ConicalInsideCenter,
Make2ConicalZeroRad, Make2ConicalZeroRadFlip, Make2ConicalZeroRadCenter,
};
constexpr GradMaker gGradMakersEdgeCases[] = {
Make2ConicalEdgeX, Make2ConicalEdgeY,
Make2ConicalZeroRadEdgeX, Make2ConicalZeroRadEdgeY,
Make2ConicalTouchX, Make2ConicalTouchY,
Make2ConicalInsideSmallRad
};
constexpr struct {
const GradMaker* fMaker;
const int fCount;
const char* fName;
} gGradCases[] = {
{ gGradMakersOutside, SK_ARRAY_COUNT(gGradMakersOutside), "outside" },
{ gGradMakersInside, SK_ARRAY_COUNT(gGradMakersInside), "inside" },
{ gGradMakersEdgeCases, SK_ARRAY_COUNT(gGradMakersEdgeCases), "edge" },
};
enum GradCaseType { // these must match the order in gGradCases
kOutside_GradCaseType,
kInside_GradCaseType,
kEdge_GradCaseType,
};
///////////////////////////////////////////////////////////////////////////////
class ConicalGradientsGM : public GM {
public:
ConicalGradientsGM(GradCaseType gradCaseType, bool dither,
SkShader::TileMode mode = SkShader::kClamp_TileMode)
: fGradCaseType(gradCaseType)
, fDither(dither)
, fMode(mode) {
this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
fName.printf("gradients_2pt_conical_%s%s", gGradCases[gradCaseType].fName,
fDither ? "" : "_nodither");
switch (mode) {
case SkShader::kRepeat_TileMode:
fName.appendf("_repeat");
break;
case SkShader::kMirror_TileMode:
fName.appendf("_mirror");
break;
default:
break;
}
}
protected:
SkString onShortName() {
return fName;
}
virtual SkISize onISize() { return SkISize::Make(840, 815); }
virtual void onDraw(SkCanvas* canvas) {
SkPoint pts[2] = {
{ 0, 0 },
{ SkIntToScalar(100), SkIntToScalar(100) }
};
SkRect r = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) };
SkPaint paint;
paint.setAntiAlias(true);
paint.setDither(fDither);
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
const GradMaker* gradMaker = gGradCases[fGradCaseType].fMaker;
const int count = gGradCases[fGradCaseType].fCount;
for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); i++) {
canvas->save();
for (int j = 0; j < count; j++) {
SkMatrix scale = SkMatrix::I();
if (i == 3) { // if the clamp case
scale.setScale(0.5f, 0.5f);
scale.postTranslate(25.f, 25.f);
}
paint.setShader(gradMaker[j](pts, gGradData[i], fMode, scale));
canvas->drawRect(r, paint);
canvas->translate(0, SkIntToScalar(120));
}
canvas->restore();
canvas->translate(SkIntToScalar(120), 0);
}
}
private:
typedef GM INHERITED;
GradCaseType fGradCaseType;
SkString fName;
bool fDither;
SkShader::TileMode fMode;
};
///////////////////////////////////////////////////////////////////////////////
DEF_GM( return new ConicalGradientsGM(kInside_GradCaseType, true); )
DEF_GM( return new ConicalGradientsGM(kOutside_GradCaseType, true); )
DEF_GM( return new ConicalGradientsGM(kEdge_GradCaseType, true); )
DEF_GM( return new ConicalGradientsGM(kInside_GradCaseType, true, SkShader::kRepeat_TileMode); )
DEF_GM( return new ConicalGradientsGM(kOutside_GradCaseType, true, SkShader::kRepeat_TileMode); )
DEF_GM( return new ConicalGradientsGM(kEdge_GradCaseType, true, SkShader::kRepeat_TileMode); )
DEF_GM( return new ConicalGradientsGM(kInside_GradCaseType, true, SkShader::kMirror_TileMode); )
DEF_GM( return new ConicalGradientsGM(kOutside_GradCaseType, true, SkShader::kMirror_TileMode); )
DEF_GM( return new ConicalGradientsGM(kEdge_GradCaseType, true, SkShader::kMirror_TileMode); )
DEF_GM( return new ConicalGradientsGM(kInside_GradCaseType, false); )
DEF_GM( return new ConicalGradientsGM(kOutside_GradCaseType, false); )
DEF_GM( return new ConicalGradientsGM(kEdge_GradCaseType, false); )
}
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