Add optional sw generated path coverage mask caching
BUG=skia:
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Review-Url: https://codereview.chromium.org/2335343008
diff --git a/gm/pathmaskcache.cpp b/gm/pathmaskcache.cpp
new file mode 100644
index 0000000..21397f0
--- /dev/null
+++ b/gm/pathmaskcache.cpp
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2016 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"
+
+#if SK_SUPPORT_GPU
+
+#include "GrContext.h"
+#include "GrContextOptions.h"
+#include "SkPath.h"
+
+/** This tests the GPU backend's caching of path coverage masks */
+class PathMaskCache : public skiagm::GM {
+public:
+ PathMaskCache() {}
+
+protected:
+ SkString onShortName() override { return SkString("path_mask_cache"); }
+
+ SkISize onISize() override {
+ return SkISize::Make(650, 950);
+ }
+
+ void onDraw(SkCanvas* canvas) override {
+ static constexpr SkScalar kPad = 5.f;
+
+ SkPaint paint;
+ paint.setAntiAlias(true);
+ auto drawPathSet = [canvas] (const SkPath& path, const SkMatrix& m) {
+ SkPaint paint;
+ paint.setAntiAlias(true);
+ SkRect bounds = path.getBounds();
+ m.mapRect(&bounds);
+ bounds.roundOut();
+ canvas->save();
+ canvas->translate(-bounds.fLeft, -bounds.fTop);
+
+ canvas->save();
+ canvas->concat(m);
+ canvas->drawPath(path, paint);
+ canvas->restore();
+
+ // translate by integer
+ canvas->translate(bounds.width() + kPad, 0.f);
+ canvas->save();
+ canvas->concat(m);
+ canvas->drawPath(path, paint);
+ canvas->restore();
+
+ // translate by non-integer
+ canvas->translate(bounds.width() + kPad + 0.15f, 0.f);
+ canvas->save();
+ canvas->concat(m);
+ canvas->drawPath(path, paint);
+ canvas->restore();
+
+ // translate again so total translate fraction is almost identical to previous.
+ canvas->translate(bounds.width() + kPad + 0.002f, 0.f);
+ canvas->save();
+ canvas->concat(m);
+ canvas->drawPath(path, paint);
+ canvas->restore();
+ canvas->restore();
+ return bounds.fBottom + kPad;
+ };
+
+
+ SkTArray<SkPath> paths;
+ paths.push_back();
+ paths.back().moveTo(0.f, 0.f);
+ paths.back().lineTo(98.f, 100.f);
+ paths.back().lineTo(100.f, 100.f);
+ paths.back().conicTo(150.f, 50.f, 100.f, 0.f, 0.6f);
+ paths.back().conicTo(148.f, 50.f, 100.f, 100.f, 0.6f);
+ paths.back().conicTo(50.f, 30.f, 0.f, 100.f, 0.9f);
+
+ paths.push_back();
+ paths.back().addCircle(30.f, 30.f, 30.f);
+ paths.back().addRect(SkRect::MakeXYWH(45.f, 45.f, 50.f, 60.f));
+ paths.back().setFillType(SkPath::kEvenOdd_FillType);
+
+ canvas->translate(kPad, kPad);
+
+ for (const SkPath& path : paths) {
+ SkScalar ty = drawPathSet(path, SkMatrix::I());
+ canvas->translate(0, ty);
+
+ // Non-uniform scale.
+ SkMatrix s;
+ s.setScale(0.5f, 2.f);
+ ty = drawPathSet(path, s);
+ canvas->translate(0.f, ty);
+
+ // Rotation
+ SkMatrix r;
+ r.setRotate(60.f, path.getBounds().centerX(), path.getBounds().centerY());
+ ty = drawPathSet(path, r);
+ canvas->translate(0.f, ty);
+ }
+ }
+
+ void modifyGrContextOptions(GrContextOptions* options) override {
+ options->fForceSWPathMasks = true;
+ options->fAllowPathMaskCaching = true;
+ }
+
+private:
+ typedef GM INHERITED;
+};
+
+DEF_GM( return new PathMaskCache(); )
+
+#endif