| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/core/SkTypes.h" |
| #include "include/effects/SkGradientShader.h" |
| |
| using 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, |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK, |
| }; |
| |
| //constexpr SkScalar gPos[] = { SK_Scalar1*999/2000, SK_Scalar1*1001/2000 }; |
| |
| constexpr GradData gGradData[] = { |
| { 40, gColors, nullptr }, |
| // { 2, gColors, gPos }, |
| // { 2, gCol2, nullptr }, |
| }; |
| |
| static sk_sp<SkShader> MakeLinear(const SkPoint pts[2], const GradData& data, SkTileMode tm) { |
| return SkGradientShader::MakeLinear(pts, data.fColors, data.fPos, data.fCount, tm); |
| } |
| |
| static sk_sp<SkShader> MakeRadial(const SkPoint pts[2], const GradData& data, SkTileMode tm) { |
| const SkPoint pt{ SkScalarAve(pts[0].fX, pts[1].fX), SkScalarAve(pts[0].fY, pts[1].fY) }; |
| return SkGradientShader::MakeRadial(pt, pt.fX, data.fColors, data.fPos, data.fCount, tm); |
| } |
| |
| static sk_sp<SkShader> MakeSweep(const SkPoint pts[2], const GradData& data, SkTileMode) { |
| const SkPoint pt{ SkScalarAve(pts[0].fX, pts[1].fX), SkScalarAve(pts[0].fY, pts[1].fY) }; |
| return SkGradientShader::MakeSweep(pt.fX, pt.fY, data.fColors, data.fPos, data.fCount); |
| } |
| |
| |
| typedef sk_sp<SkShader> (*GradMaker)(const SkPoint pts[2], const GradData&, SkTileMode); |
| |
| constexpr GradMaker gGradMakers[] = { |
| MakeLinear, MakeRadial, MakeSweep, |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class GradientsGM : public GM { |
| public: |
| GradientsGM() { |
| this->setBGColor(0xFFDDDDDD); |
| } |
| |
| protected: |
| SkString onShortName() override { return SkString("gradient_dirty_laundry"); } |
| SkISize onISize() override { return SkISize::Make(640, 615); } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkPoint pts[2] = { { 0, 0 }, |
| { SkIntToScalar(100), SkIntToScalar(100) } |
| }; |
| SkTileMode tm = SkTileMode::kClamp; |
| SkRect r = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) }; |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| |
| canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); |
| for (size_t i = 0; i < std::size(gGradData); i++) { |
| canvas->save(); |
| for (size_t j = 0; j < std::size(gGradMakers); j++) { |
| paint.setShader(gGradMakers[j](pts, gGradData[i], tm)); |
| canvas->drawRect(r, paint); |
| canvas->translate(0, SkIntToScalar(120)); |
| } |
| canvas->restore(); |
| canvas->translate(SkIntToScalar(120), 0); |
| } |
| } |
| |
| private: |
| using INHERITED = GM; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM( return new GradientsGM; ) |