savelayer gm

BUG=skia:

Change-Id: Ie24ed6e450b77447a75b5b9bdd0a4516cca5e85c
Reviewed-on: https://skia-review.googlesource.com/7093
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/gm/savelayer.cpp b/gm/savelayer.cpp
new file mode 100644
index 0000000000..9b4db3530b
--- /dev/null
+++ b/gm/savelayer.cpp
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2017 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"
+
+static void saveLayer(SkCanvas* canvas, SkScalar l, SkScalar t, SkScalar r, SkScalar b) {
+    uint32_t flag = 1U << 31;
+    SkRect rect = SkRect::MakeLTRB(l, t, r, b);
+    canvas->saveLayer({ &rect, nullptr, nullptr, flag });
+}
+
+static void do_draw(SkCanvas* canvas) {
+    SkPaint paint;
+    SkRandom rand;
+
+    SkAutoCanvasRestore acr(canvas, true);
+    for (int i = 0; i < 20; ++i) {
+        paint.setColor(rand.nextU() | (0xFF << 24));
+        canvas->drawRect({ 15, 15, 290, 40 }, paint);
+        canvas->translate(0, 30);
+    }
+}
+
+DEF_SIMPLE_GM(savelayer_unclipped, canvas, 320, 640) {
+    const SkScalar L = 10;
+    const SkScalar T = 10;
+    const SkScalar R = 310;
+    const SkScalar B = 630;
+
+    canvas->clipRect({ L, T, R, B });
+
+    for (int i = 0; i < 100; ++i) {
+        SkAutoCanvasRestore acr(canvas, true);
+        saveLayer(canvas, L, T, R, T + 20);
+        saveLayer(canvas, L, B - 20, R, B);
+        do_draw(canvas);
+    }
+}