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
diff --git a/gm/aaa.cpp b/gm/aaa.cpp
new file mode 100644
index 0000000..d49d3f0
--- /dev/null
+++ b/gm/aaa.cpp
@@ -0,0 +1,59 @@
+/*
+ * 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 "SkPath.h"
+#include "SkScan.h"
+
+#define W 800
+#define H 800
+
+class AnalyticAntiAliasConvexGM : public skiagm::GM {
+public:
+ AnalyticAntiAliasConvexGM() {}
+
+protected:
+
+ SkString onShortName() override {
+ return SkString("analytic_antialias_convex");
+ }
+
+ SkISize onISize() override {
+ return SkISize::Make(W, H);
+ }
+
+ void onDraw(SkCanvas* canvas) override {
+ SkPaint p;
+ p.setColor(SK_ColorRED);
+ p.setAntiAlias(true);
+
+ canvas->clear(0xFFFFFFFF);
+
+ canvas->save();
+
+ SkScalar y = 0;
+
+ canvas->translate(0, y);
+ canvas->rotate(1);
+ canvas->drawRectCoords(20, 20, 200, 200, p);
+ canvas->restore();
+
+ y += 200;
+
+ canvas->translate(0, y);
+ canvas->rotate(1);
+ canvas->drawRectCoords(20, 20, 20.2f, 200, p);
+ canvas->drawRectCoords(20, 200, 200, 200.1f, p);
+ canvas->drawCircle(100, 100, 30, p);
+ canvas->restore();
+ }
+
+private:
+ typedef skiagm::GM INHERITED;
+};
+
+DEF_GM( return new AnalyticAntiAliasConvexGM; )
diff --git a/gm/addarc.cpp b/gm/addarc.cpp
index 9280140..0a1876b 100644
--- a/gm/addarc.cpp
+++ b/gm/addarc.cpp
@@ -165,6 +165,59 @@
//////////////////////
+// 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 };