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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 "third_party/skia/include/core/SkBitmap.h" | |
12 #include "ui/gfx/size.h" | |
13 | |
14 namespace gfx { | |
15 | |
16 // A Java counterpart will be generated for this enum. | |
17 // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.ui.gfx | |
18 enum BitmapFormat { | |
19 BITMAP_FORMAT_NO_CONFIG, | |
20 BITMAP_FORMAT_ALPHA_8, | |
21 BITMAP_FORMAT_ARGB_4444, | |
22 BITMAP_FORMAT_ARGB_8888, | |
23 BITMAP_FORMAT_RGB_565, | |
24 }; | |
25 | |
26 // This class wraps a JNI AndroidBitmap object to make it easier to use. It | |
27 // handles locking and unlocking of the underlying pixels, along with wrapping | |
28 // various JNI methods. | |
29 class GFX_EXPORT JavaBitmap { | |
30 public: | |
31 explicit JavaBitmap(jobject bitmap); | |
32 ~JavaBitmap(); | |
33 | |
34 inline void* pixels() { return pixels_; } | |
35 inline const void* pixels() const { return pixels_; } | |
36 inline const gfx::Size& size() const { return size_; } | |
37 // Formats are in android/bitmap.h; e.g. ANDROID_BITMAP_FORMAT_RGBA_8888 | |
38 inline int format() const { return format_; } | |
39 inline uint32_t stride() const { return stride_; } | |
40 | |
41 // Registers methods with JNI and returns true if succeeded. | |
42 static bool RegisterJavaBitmap(JNIEnv* env); | |
43 | |
44 private: | |
45 jobject bitmap_; | |
46 void* pixels_; | |
47 gfx::Size size_; | |
48 int format_; | |
49 uint32_t stride_; | |
50 | |
51 DISALLOW_COPY_AND_ASSIGN(JavaBitmap); | |
52 }; | |
53 | |
54 // Allocates a Java-backed bitmap (android.graphics.Bitmap) with the given | |
55 // (non-empty!) size and color type. | |
56 GFX_EXPORT base::android::ScopedJavaLocalRef<jobject> CreateJavaBitmap( | |
57 int width, | |
58 int height, | |
59 SkColorType color_type); | |
60 | |
61 // Loads an SkBitmap from the provided drawable resource identifier (e.g., | |
62 // android:drawable/overscroll_glow). If the resource loads successfully, it | |
63 // will be integrally scaled down, preserving aspect ratio, to a size no smaller | |
64 // than |size|. Otherwise, an empty bitmap is returned. | |
65 GFX_EXPORT SkBitmap | |
66 CreateSkBitmapFromAndroidResource(const char* name, gfx::Size size); | |
67 | |
68 // Converts |skbitmap| to a Java-backed bitmap (android.graphics.Bitmap). | |
69 // Note: |skbitmap| is assumed to be non-null, non-empty and one of RGBA_8888 or | |
70 // RGB_565 formats. | |
71 GFX_EXPORT base::android::ScopedJavaLocalRef<jobject> ConvertToJavaBitmap( | |
72 const SkBitmap* skbitmap); | |
73 | |
74 // Converts |bitmap| to an SkBitmap of the same size and format. | |
75 // Note: |jbitmap| is assumed to be non-null, non-empty and of format RGBA_8888. | |
76 GFX_EXPORT SkBitmap CreateSkBitmapFromJavaBitmap(const JavaBitmap& jbitmap); | |
77 | |
78 // Returns a Skia color type value for the requested input java Bitmap.Config. | |
79 GFX_EXPORT SkColorType ConvertToSkiaColorType(jobject jbitmap_config); | |
80 | |
81 } // namespace gfx | |
82 | |
83 #endif // UI_GFX_ANDROID_JAVA_BITMAP_H_ | |
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