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skia2/gm/gradients_2pt_conical.cpp
Yuqian Li 650dd901e1 Fix concentric 2pt conical gradient in GPU where r1 < r0 
Bug: skia:7683
Change-Id: I6608e72fa695c855af6a6a447885c4889b09fc1d
Reviewed-on: https://skia-review.googlesource.com/115042
Commit-Queue: Yuqian Li <liyuqian@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
2018-03-19 18:50:46 +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;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
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> Make2ConicalInsideCenterReversed(const SkPoint pts[2], const GradData& data,
SkShader::TileMode tm, const SkMatrix& localMatrix) {
SkPoint center0;
center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
SkScalarAve(pts[0].fY, pts[1].fY));
return SkGradientShader::MakeTwoPointConical(center0, (pts[1].fX - pts[0].fX) / 2,
center0, (pts[1].fX - pts[0].fX) / 7,
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,
Make2ConicalInsideCenterReversed
};
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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