java_bitmap.h revision 2a99a7e74a7f215066514fe81d2bfa6639d9eddd 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef UI_GFX_ANDROID_JAVA_BITMAP_H_
6#define UI_GFX_ANDROID_JAVA_BITMAP_H_
7
8#include <jni.h>
9
10#include "base/android/scoped_java_ref.h"
11#include "ui/gfx/size.h"
12
13class SkBitmap;
14
15namespace gfx {
16
17// This class wraps a JNI AndroidBitmap object to make it easier to use. It
18// handles locking and unlocking of the underlying pixels, along with wrapping
19// various JNI methods.
20class UI_EXPORT JavaBitmap {
21 public:
22  explicit JavaBitmap(jobject bitmap);
23  ~JavaBitmap();
24
25  inline void* pixels() { return pixels_; }
26  inline const gfx::Size& size() const { return size_; }
27  // Formats are in android/bitmap.h; e.g. ANDROID_BITMAP_FORMAT_RGBA_8888
28  inline int format() const { return format_; }
29  inline uint32_t stride() const { return stride_; }
30
31  // Registers methods with JNI and returns true if succeeded.
32  static bool RegisterJavaBitmap(JNIEnv* env);
33
34 private:
35  jobject bitmap_;
36  void* pixels_;
37  gfx::Size size_;
38  int format_;
39  uint32_t stride_;
40
41  DISALLOW_COPY_AND_ASSIGN(JavaBitmap);
42};
43
44UI_EXPORT base::android::ScopedJavaLocalRef<jobject> CreateJavaBitmap(
45    const gfx::Size& size);
46
47UI_EXPORT base::android::ScopedJavaLocalRef<jobject> ConvertToJavaBitmap(
48    const SkBitmap* skbitmap);
49
50SkBitmap CreateSkBitmapFromResource(const char* name);
51
52}  // namespace gfx
53
54#endif  // UI_GFX_ANDROID_JAVA_BITMAP_H_
55