Move gaussianBlur functionality to src\effects
https://codereview.chromium.org/18771004/
git-svn-id: http://skia.googlecode.com/svn/trunk@10080 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/SkGpuBlurUtils.h b/src/effects/SkGpuBlurUtils.h
new file mode 100644
index 0000000..d0e2e41
--- /dev/null
+++ b/src/effects/SkGpuBlurUtils.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkGpuBlurUtils_DEFINED
+#define SkGpuBlurUtils_DEFINED
+
+#if SK_SUPPORT_GPU
+class GrTexture;
+class GrContext;
+#endif
+
+struct SkRect;
+
+namespace SkGpuBlurUtils {
+
+#if SK_SUPPORT_GPU
+ /**
+ * Applies a 2D Gaussian blur to a given texture.
+ * @param context The GPU context
+ * @param srcTexture The source texture to be blurred.
+ * @param canClobberSrc If true, srcTexture may be overwritten, and
+ * may be returned as the result.
+ * @param rect The destination rectangle.
+ * @param sigmaX The blur's standard deviation in X.
+ * @param sigmaY The blur's standard deviation in Y.
+ * @return the blurred texture, which may be srcTexture reffed, or a
+ * new texture. It is the caller's responsibility to unref this texture.
+ */
+ GrTexture* GaussianBlur(GrContext* context,
+ GrTexture* srcTexture,
+ bool canClobberSrc,
+ const SkRect& rect,
+ float sigmaX,
+ float sigmaY);
+#endif
+
+};
+
+#endif
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