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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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