| /* |
| * 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/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRect.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" |
| #include "include/private/SkTArray.h" |
| #include "include/utils/SkRandom.h" |
| #include "tools/ToolUtils.h" |
| |
| namespace skiagm { |
| |
| class OvalGM : public GM { |
| public: |
| OvalGM() { |
| this->setBGColor(0xFF000000); |
| this->makePaints(); |
| this->makeMatrices(); |
| } |
| |
| protected: |
| |
| SkString onShortName() override { |
| return SkString("ovals"); |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(1200, 900); |
| } |
| |
| void makePaints() { |
| { |
| // no AA |
| SkPaint p; |
| fPaints.push_back(p); |
| } |
| |
| { |
| // AA |
| SkPaint p; |
| p.setAntiAlias(true); |
| fPaints.push_back(p); |
| } |
| |
| { |
| // AA with stroke style |
| SkPaint p; |
| p.setAntiAlias(true); |
| p.setStyle(SkPaint::kStroke_Style); |
| p.setStrokeWidth(SkIntToScalar(5)); |
| fPaints.push_back(p); |
| } |
| |
| { |
| // AA with stroke style, width = 0 |
| SkPaint p; |
| p.setAntiAlias(true); |
| p.setStyle(SkPaint::kStroke_Style); |
| fPaints.push_back(p); |
| } |
| |
| { |
| // AA with stroke and fill style |
| SkPaint p; |
| p.setAntiAlias(true); |
| p.setStyle(SkPaint::kStrokeAndFill_Style); |
| p.setStrokeWidth(SkIntToScalar(3)); |
| fPaints.push_back(p); |
| } |
| } |
| |
| void makeMatrices() { |
| { |
| SkMatrix m; |
| m.setIdentity(); |
| fMatrices.push_back(m); |
| } |
| |
| { |
| SkMatrix m; |
| m.setScale(SkIntToScalar(3), SkIntToScalar(2)); |
| fMatrices.push_back(m); |
| } |
| |
| { |
| SkMatrix m; |
| m.setScale(SkIntToScalar(2), SkIntToScalar(2)); |
| fMatrices.push_back(m); |
| } |
| |
| { |
| SkMatrix m; |
| m.setScale(SkIntToScalar(1), SkIntToScalar(2)); |
| fMatrices.push_back(m); |
| } |
| |
| { |
| SkMatrix m; |
| m.setScale(SkIntToScalar(4), SkIntToScalar(1)); |
| fMatrices.push_back(m); |
| } |
| |
| { |
| SkMatrix m; |
| m.setRotate(SkIntToScalar(90)); |
| fMatrices.push_back(m); |
| } |
| |
| { |
| SkMatrix m; |
| m.setSkew(SkIntToScalar(2), SkIntToScalar(3)); |
| fMatrices.push_back(m); |
| } |
| |
| { |
| SkMatrix m; |
| m.setRotate(SkIntToScalar(60)); |
| fMatrices.push_back(m); |
| } |
| } |
| |
| SkColor genColor(SkRandom* rand) { |
| SkScalar hsv[3]; |
| hsv[0] = rand->nextRangeF(0.0f, 360.0f); |
| hsv[1] = rand->nextRangeF(0.75f, 1.0f); |
| hsv[2] = rand->nextRangeF(0.75f, 1.0f); |
| |
| return ToolUtils::color_to_565(SkHSVToColor(hsv)); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkRandom rand(1); |
| canvas->translate(20 * SK_Scalar1, 20 * SK_Scalar1); |
| const SkRect kOval = SkRect::MakeLTRB(-20, -30, 20, 30); |
| |
| const SkScalar kXStart = 60.0f; |
| const SkScalar kYStart = 80.0f; |
| const int kXStep = 150; |
| const int kYStep = 160; |
| int maxX = fMatrices.size(); |
| |
| SkPaint rectPaint; |
| rectPaint.setAntiAlias(true); |
| rectPaint.setStyle(SkPaint::kStroke_Style); |
| rectPaint.setStrokeWidth(SkIntToScalar(0)); |
| rectPaint.setColor(SK_ColorLTGRAY); |
| |
| int testCount = 0; |
| for (int i = 0; i < fPaints.size(); ++i) { |
| for (int j = 0; j < fMatrices.size(); ++j) { |
| canvas->save(); |
| SkMatrix mat = fMatrices[j]; |
| // position the oval, and make it at off-integer coords. |
| mat.postTranslate(kXStart + SK_Scalar1 * kXStep * (testCount % maxX) + |
| SK_Scalar1 / 4, |
| kYStart + SK_Scalar1 * kYStep * (testCount / maxX) + |
| 3 * SK_Scalar1 / 4); |
| canvas->concat(mat); |
| |
| SkColor color = genColor(&rand); |
| fPaints[i].setColor(color); |
| |
| canvas->drawRect(kOval, rectPaint); |
| canvas->drawOval(kOval, fPaints[i]); |
| |
| canvas->restore(); |
| |
| ++testCount; |
| } |
| } |
| |
| // special cases |
| |
| // non-scaled tall and skinny oval |
| for (int i = 0; i < fPaints.size(); ++i) { |
| SkRect oval = SkRect::MakeLTRB(-20, -60, 20, 60); |
| canvas->save(); |
| // position the oval, and make it at off-integer coords. |
| canvas->translate(kXStart + SK_Scalar1 * kXStep * 2.55f + SK_Scalar1 / 4, |
| kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4); |
| |
| SkColor color = genColor(&rand); |
| fPaints[i].setColor(color); |
| |
| canvas->drawRect(oval, rectPaint); |
| canvas->drawOval(oval, fPaints[i]); |
| canvas->restore(); |
| } |
| |
| // non-scaled wide and short oval |
| for (int i = 0; i < fPaints.size(); ++i) { |
| SkRect oval = SkRect::MakeLTRB(-80, -30, 80, 30); |
| canvas->save(); |
| // position the oval, and make it at off-integer coords. |
| canvas->translate(kXStart + SK_Scalar1 * kXStep * 4 + SK_Scalar1 / 4, |
| kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 + |
| SK_ScalarHalf * kYStep); |
| |
| SkColor color = genColor(&rand); |
| fPaints[i].setColor(color); |
| |
| canvas->drawRect(oval, rectPaint); |
| canvas->drawOval(oval, fPaints[i]); |
| canvas->restore(); |
| } |
| |
| // super skinny oval |
| for (int i = 0; i < fPaints.size(); ++i) { |
| SkRect oval = SkRect::MakeLTRB(0, -60, 1, 60); |
| canvas->save(); |
| // position the oval, and make it at off-integer coords. |
| canvas->translate(kXStart + SK_Scalar1 * kXStep * 3.25f + SK_Scalar1 / 4, |
| kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4); |
| |
| SkColor color = genColor(&rand); |
| fPaints[i].setColor(color); |
| |
| canvas->drawOval(oval, fPaints[i]); |
| canvas->restore(); |
| } |
| |
| // super short oval |
| for (int i = 0; i < fPaints.size(); ++i) { |
| SkRect oval = SkRect::MakeLTRB(-80, -1, 80, 0); |
| canvas->save(); |
| // position the oval, and make it at off-integer coords. |
| canvas->translate(kXStart + SK_Scalar1 * kXStep * 2.5f + SK_Scalar1 / 4, |
| kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 + |
| SK_ScalarHalf * kYStep); |
| |
| SkColor color = genColor(&rand); |
| fPaints[i].setColor(color); |
| |
| canvas->drawOval(oval, fPaints[i]); |
| canvas->restore(); |
| } |
| |
| // radial gradient |
| SkPoint center = SkPoint::Make(SkIntToScalar(0), SkIntToScalar(0)); |
| SkColor colors[] = { SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN }; |
| SkScalar pos[] = { 0, SK_ScalarHalf, SK_Scalar1 }; |
| auto shader = SkGradientShader::MakeRadial(center, 20, colors, pos, std::size(colors), |
| SkTileMode::kClamp); |
| |
| for (int i = 0; i < fPaints.size(); ++i) { |
| canvas->save(); |
| // position the path, and make it at off-integer coords. |
| canvas->translate(kXStart + SK_Scalar1 * kXStep * 0 + SK_Scalar1 / 4, |
| kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 + |
| SK_ScalarHalf * kYStep); |
| |
| SkColor color = genColor(&rand); |
| fPaints[i].setColor(color); |
| fPaints[i].setShader(shader); |
| |
| canvas->drawRect(kOval, rectPaint); |
| canvas->drawOval(kOval, fPaints[i]); |
| |
| fPaints[i].setShader(nullptr); |
| |
| canvas->restore(); |
| } |
| |
| // reflected oval |
| for (int i = 0; i < fPaints.size(); ++i) { |
| SkRect oval = SkRect::MakeLTRB(-30, -30, 30, 30); |
| canvas->save(); |
| // position the oval, and make it at off-integer coords. |
| canvas->translate(kXStart + SK_Scalar1 * kXStep * 5 + SK_Scalar1 / 4, |
| kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 + |
| SK_ScalarHalf * kYStep); |
| canvas->rotate(90); |
| canvas->scale(1, -1); |
| canvas->scale(1, 0.66f); |
| |
| SkColor color = genColor(&rand); |
| fPaints[i].setColor(color); |
| |
| canvas->drawRect(oval, rectPaint); |
| canvas->drawOval(oval, fPaints[i]); |
| canvas->restore(); |
| } |
| } |
| |
| private: |
| SkTArray<SkPaint> fPaints; |
| SkTArray<SkMatrix> fMatrices; |
| |
| using INHERITED = GM; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM( return new OvalGM; ) |
| |
| } // namespace skiagm |