gm to test hairlines which fill RenderTarget
BUG=skia:
Review URL: https://codereview.chromium.org/934283002
diff --git a/gm/stlouisarch.cpp b/gm/stlouisarch.cpp
new file mode 100644
index 0000000..06f6078
--- /dev/null
+++ b/gm/stlouisarch.cpp
@@ -0,0 +1,97 @@
+/*
+ * 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.h"
+#include "SkCanvas.h"
+#include "SkTArray.h"
+
+namespace skiagm {
+
+// this GM tests hairlines which fill nearly the entire render target
+class StLouisArchGM : public GM {
+protected:
+ SkString onShortName() SK_OVERRIDE {
+ return SkString("stlouisarch");
+ }
+
+ SkISize onISize() SK_OVERRIDE { return SkISize::Make((int)kWidth, (int)kHeight); }
+
+ void onOnceBeforeDraw() SK_OVERRIDE {
+ {
+ SkPath* bigQuad = &fPaths.push_back();
+ bigQuad->moveTo(0, 0);
+ bigQuad->quadTo(kWidth/2, kHeight, kWidth, 0);
+ }
+
+ {
+ SkPath* degenBigQuad = &fPaths.push_back();
+ SkScalar yPos = kHeight / 2 + 10;
+ degenBigQuad->moveTo(0, yPos);
+ degenBigQuad->quadTo(0, yPos, kWidth, yPos);
+ }
+
+
+ {
+ SkPath* bigCubic = &fPaths.push_back();
+ bigCubic->moveTo(0, 0);
+ bigCubic->cubicTo(0, kHeight,
+ kWidth, kHeight,
+ kWidth, 0);
+ }
+
+ {
+ SkPath* degenBigCubic = &fPaths.push_back();
+ SkScalar yPos = kHeight / 2;
+ degenBigCubic->moveTo(0, yPos);
+ degenBigCubic->cubicTo(0, yPos,
+ 0, yPos,
+ kWidth, yPos);
+ }
+
+ {
+ SkPath* bigConic = &fPaths.push_back();
+ bigConic->moveTo(0, 0);
+ bigConic->conicTo(kWidth/2, kHeight, kWidth, 0, .5);
+ }
+
+ {
+ SkPath* degenBigConic = &fPaths.push_back();
+ SkScalar yPos = kHeight / 2 - 10;
+ degenBigConic->moveTo(0, yPos);
+ degenBigConic->conicTo(0, yPos, kWidth, yPos, .5);
+ }
+ }
+
+ void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+ canvas->save();
+ canvas->scale(1, -1);
+ canvas->translate(0, -kHeight);
+ for (int p = 0; p < fPaths.count(); ++p) {
+ SkPaint paint;
+ paint.setARGB(0xff, 0, 0, 0);
+ paint.setAntiAlias(true);
+ paint.setStyle(SkPaint::kStroke_Style);
+ paint.setStrokeWidth(0);
+ canvas->drawPath(fPaths[p], paint);
+ }
+ canvas->restore();
+ }
+
+ const SkScalar kWidth = 256;
+ const SkScalar kHeight = 256;
+
+private:
+ SkTArray<SkPath> fPaths;
+ typedef GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static GM* MyFactory(void*) { return new StLouisArchGM; }
+static GMRegistry reg(MyFactory);
+
+}