Blur gm.

Change-Id: I47294ba47880237541dee8193df55e31b3487f24
Reviewed-on: https://skia-review.googlesource.com/22061
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Herb Derby <herb@google.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/gm/blurimagevmask.cpp b/gm/blurimagevmask.cpp
new file mode 100644
index 0000000000..15f8d1e1ca
--- /dev/null
+++ b/gm/blurimagevmask.cpp
@@ -0,0 +1,57 @@
+/*
+ * 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 "SkBlurMaskFilter.h"
+#include "SkBlurImageFilter.h"
+#include "gm.h"
+#include "sk_tool_utils.h"
+
+
+DEF_SIMPLE_GM(blurimagevmask, canvas, 700, 1200) {
+    SkPaint paint;
+    paint.setAntiAlias(true);
+    paint.setColor(SK_ColorBLACK);
+
+    SkPaint textPaint;
+    textPaint.setAntiAlias(true);
+    sk_tool_utils::set_portable_typeface(&textPaint);
+    textPaint.setTextSize(SkIntToScalar(25));
+
+    const double sigmas[] = {3.0, 8.0, 16.0, 24.0, 32.0};
+
+    canvas->drawString("mask blur",  285, 50, textPaint);
+    canvas->drawString("image blur", 285 + 250, 50, textPaint);
+
+
+    SkRect r = {35, 100, 135, 200};
+    for (auto sigma:sigmas) {
+
+        canvas->drawRect(r, paint);
+
+        char out[100];
+        sprintf(out, "Sigma: %g", sigma);
+        canvas->drawString(out, r.left(), r.bottom() + 35, textPaint);
+
+        r.offset(250, 0);
+
+        paint.setMaskFilter(
+            SkBlurMaskFilter::Make(kNormal_SkBlurStyle, sigma,
+                                   SkBlurMaskFilter::kHighQuality_BlurFlag));
+        canvas->drawRect(r, paint);
+        paint.setMaskFilter(nullptr);
+
+        SkPaint imageBlurPaint;
+        r.offset(250, 0);
+        imageBlurPaint.setImageFilter(SkBlurImageFilter::Make(sigma, sigma, nullptr));
+        canvas->saveLayer(nullptr, &imageBlurPaint);
+
+        canvas->drawRect(r, paint);
+        canvas->restore();
+        r.offset(-500, 200);
+    }
+
+}