| /* |
| * 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 "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> 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 |
| }; |
| |
| 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) |
| : fGradCaseType(gradCaseType) |
| , fDither(dither) { |
| this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD)); |
| fName.printf("gradients_2pt_conical_%s%s", gGradCases[gradCaseType].fName, |
| fDither ? "" : "_nodither"); |
| } |
| |
| 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) } |
| }; |
| SkShader::TileMode tm = SkShader::kClamp_TileMode; |
| 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], tm, 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; |
| }; |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| 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, false); ) |
| DEF_GM( return new ConicalGradientsGM(kOutside_GradCaseType, false); ) |
| DEF_GM( return new ConicalGradientsGM(kEdge_GradCaseType, false); ) |
| |
| } |
