clean up SkPicture include

Get SkPicture.h ready for documenting.

- remove private methods
- move private forward declarations
- name parameters

R=reed@google.com, bsalomon@google.com

Bug: skia:6898
Change-Id: I28829111203d8ae2a4661cf02c99023403aa0df0
Reviewed-on: https://skia-review.googlesource.com/134120
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Cary Clark <caryclark@skia.org>
Commit-Queue: Cary Clark <caryclark@google.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/src/core/SkPicturePriv.h b/src/core/SkPicturePriv.h
new file mode 100644
index 0000000000..5c772fc9df
--- /dev/null
+++ b/src/core/SkPicturePriv.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkPicturePriv_DEFINED
+#define SkPicturePriv_DEFINED
+
+#include "SkPicture.h"
+
+class SkReadBuffer;
+class SkWriteBuffer;
+
+class SkPicturePriv {
+public:
+    /**
+     *  Recreate a picture that was serialized into a buffer. If the creation requires bitmap
+     *  decoding, the decoder must be set on the SkReadBuffer parameter by calling
+     *  SkReadBuffer::setBitmapDecoder() before calling SkPicture::MakeFromBuffer().
+     *  @param buffer Serialized picture data.
+     *  @return A new SkPicture representing the serialized data, or NULL if the buffer is
+     *          invalid.
+     */
+    static sk_sp<SkPicture> MakeFromBuffer(SkReadBuffer& buffer);
+
+    /**
+     *  Serialize to a buffer.
+     */
+    static void Flatten(const sk_sp<const SkPicture> , SkWriteBuffer& buffer);
+
+    // Returns NULL if this is not an SkBigPicture.
+    static const SkBigPicture* AsSkBigPicture(const sk_sp<const SkPicture> picture) {
+        return picture->asSkBigPicture();
+    }
+};
+
+#endif