| /* |
| * Copyright 2015 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/SkBlendMode.h" |
| #include "include/core/SkBlurTypes.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkColorFilter.h" |
| #include "include/core/SkMaskFilter.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkRRect.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| |
| namespace skiagm { |
| |
| // This GM reproduces the precision artifacts seen in crbug.com/560651. |
| // It draws a largish blurred circle with its center clipped out. |
| class BlurredClippedCircleGM : public GM { |
| public: |
| BlurredClippedCircleGM() { |
| this->setBGColor(0xFFCCCCCC); |
| } |
| |
| protected: |
| SkString getName() const override { return SkString("blurredclippedcircle"); } |
| |
| SkISize getISize() override { return SkISize::Make(kWidth, kHeight); } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkPaint whitePaint; |
| whitePaint.setColor(SK_ColorWHITE); |
| whitePaint.setBlendMode(SkBlendMode::kSrc); |
| whitePaint.setAntiAlias(true); |
| |
| // This scale exercises precision limits in the circle blur effect (crbug.com/560651) |
| constexpr float kScale = 2.0f; |
| canvas->scale(kScale, kScale); |
| |
| canvas->save(); |
| SkRect clipRect1 = SkRect::MakeLTRB(0, 0, kWidth, kHeight); |
| canvas->clipRect(clipRect1); |
| |
| canvas->save(); |
| |
| canvas->clipRect(clipRect1); |
| canvas->drawRect(clipRect1, whitePaint); |
| |
| canvas->save(); |
| |
| SkRect clipRect2 = SkRect::MakeLTRB(8, 8, 288, 288); |
| SkRRect clipRRect = SkRRect::MakeOval(clipRect2); |
| canvas->clipRRect(clipRRect, SkClipOp::kDifference, true); |
| |
| SkRect r = SkRect::MakeLTRB(4, 4, 292, 292); |
| SkRRect rr = SkRRect::MakeOval(r); |
| |
| SkPaint paint; |
| |
| paint.setMaskFilter(SkMaskFilter::MakeBlur( |
| kNormal_SkBlurStyle, |
| 1.366025f)); |
| paint.setColorFilter(SkColorFilters::Blend(SK_ColorRED, SkBlendMode::kSrcIn)); |
| paint.setAntiAlias(true); |
| |
| canvas->drawRRect(rr, paint); |
| |
| canvas->restore(); |
| canvas->restore(); |
| canvas->restore(); |
| } |
| |
| private: |
| inline static constexpr int kWidth = 1164; |
| inline static constexpr int kHeight = 802; |
| |
| using INHERITED = GM; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM(return new BlurredClippedCircleGM;) |
| } // namespace skiagm |