diff options
author | liyuqian <liyuqian@google.com> | 2016-10-03 13:49:37 -0700 |
---|---|---|
committer | Commit bot <commit-bot@chromium.org> | 2016-10-03 13:49:37 -0700 |
commit | e60d85597f803c4dff6329840215af1d1d9a8fdc (patch) | |
tree | f82916ea6f7f539cd4af0e8bda723d82ce58d4ab /gm/addarc.cpp | |
parent | f85d2a4fa1b71e6ee28518431e2a34df5683bc81 (diff) |
Add GMs for Analytic Anti-Aliasing
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2386293002
Review-Url: https://codereview.chromium.org/2386293002
Diffstat (limited to 'gm/addarc.cpp')
-rw-r--r-- | gm/addarc.cpp | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/gm/addarc.cpp b/gm/addarc.cpp index 9280140794..0a1876b2dc 100644 --- a/gm/addarc.cpp +++ b/gm/addarc.cpp @@ -165,6 +165,59 @@ DEF_GM( return new StrokeCircleGM; ) ////////////////////// +// Fill circles and rotate them to test our Analytic Anti-Aliasing. +// This test is based on StrokeCircleGM. +class FillCircleGM : public skiagm::GM { +public: + FillCircleGM() : fRotate(0) {} + +protected: + SkString onShortName() override { return SkString("fillcircle"); } + + SkISize onISize() override { return SkISize::Make(520, 520); } + + void onDraw(SkCanvas* canvas) override { + canvas->scale(20, 20); + canvas->translate(13, 13); + + SkPaint paint; + paint.setAntiAlias(true); + paint.setStyle(SkPaint::kStroke_Style); + paint.setStrokeWidth(SK_Scalar1 / 2); + + const SkScalar strokeWidth = paint.getStrokeWidth(); + const SkScalar delta = strokeWidth * 3 / 2; + SkRect r = SkRect::MakeXYWH(-12, -12, 24, 24); + SkRandom rand; + + // Reset style to fill. We only need stroke stype for producing delta and strokeWidth + paint.setStyle(SkPaint::kFill_Style); + + SkScalar sign = 1; + while (r.width() > strokeWidth * 2) { + SkAutoCanvasRestore acr(canvas, true); + canvas->rotate(fRotate * sign); + paint.setColor(sk_tool_utils::color_to_565(rand.nextU() | (0xFF << 24))); + canvas->drawOval(r, paint); + r.inset(delta, delta); + sign = -sign; + } + } + + bool onAnimate(const SkAnimTimer& timer) override { + fRotate = timer.scaled(60, 360); + return true; + } + +private: + SkScalar fRotate; + + typedef skiagm::GM INHERITED; +}; +DEF_GM( return new FillCircleGM; ) + +////////////////////// + static void html_canvas_arc(SkPath* path, SkScalar x, SkScalar y, SkScalar r, SkScalar start, SkScalar end, bool ccw) { SkRect bounds = { x - r, y - r, x + r, y + r }; |