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1 // Copyright 2012 The Chromium Authors. All rights reserved. | 1 // Copyright 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 package org.chromium.ui.gfx; | 5 package org.chromium.ui.gfx; |
6 | 6 |
7 import android.content.res.Resources; | 7 import android.content.res.Resources; |
8 import android.graphics.Bitmap; | 8 import android.graphics.Bitmap; |
9 import android.graphics.BitmapFactory; | 9 import android.graphics.BitmapFactory; |
10 | 10 |
11 import org.chromium.base.CalledByNative; | 11 import org.chromium.base.CalledByNative; |
12 import org.chromium.base.JNINamespace; | 12 import org.chromium.base.JNINamespace; |
13 | 13 |
14 /** | 14 /** |
15 * Helper class to decode and sample down bitmap resources. | 15 * Helper class to decode and sample down bitmap resources. |
16 */ | 16 */ |
17 @JNINamespace("gfx") | 17 @JNINamespace("gfx") |
18 public class BitmapHelper { | 18 public class BitmapHelper { |
19 @CalledByNative | 19 @CalledByNative |
20 private static Bitmap createBitmap(int width, | 20 private static Bitmap createBitmap(int width, |
21 int height, | 21 int height, |
22 boolean is565Config) { | 22 Bitmap.Config bitmapConfig) { |
bulach
2014/02/28 13:19:25
this will require an extra JNI call, how about pas
sivag
2014/03/04 12:36:04
Done.
| |
23 if (is565Config) { | 23 return Bitmap.createBitmap(width, height, bitmapConfig); |
24 return Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); | |
25 } | |
26 return Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); | |
27 } | 24 } |
28 | 25 |
29 /** | 26 /** |
30 * Decode and sample down a bitmap resource to the requested width and heigh t. | 27 * Decode and sample down a bitmap resource to the requested width and heigh t. |
31 * | 28 * |
32 * @param name The resource name of the bitmap to decode. | 29 * @param name The resource name of the bitmap to decode. |
33 * @param reqWidth The requested width of the resulting bitmap. | 30 * @param reqWidth The requested width of the resulting bitmap. |
34 * @param reqHeight The requested height of the resulting bitmap. | 31 * @param reqHeight The requested height of the resulting bitmap. |
35 * @return A bitmap sampled down from the original with the same aspect rati o and dimensions. | 32 * @return A bitmap sampled down from the original with the same aspect rati o and dimensions. |
36 * that are equal to or greater than the requested width and height. | 33 * that are equal to or greater than the requested width and height. |
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76 return inSampleSize; | 73 return inSampleSize; |
77 } | 74 } |
78 | 75 |
79 /** | 76 /** |
80 * Provides a matching integer constant for the Bitmap.Config value passed. | 77 * Provides a matching integer constant for the Bitmap.Config value passed. |
81 * | 78 * |
82 * @param bitmapConfig The Bitmap Configuration value. | 79 * @param bitmapConfig The Bitmap Configuration value. |
83 * @return Matching integer constant for the Bitmap.Config value passed. | 80 * @return Matching integer constant for the Bitmap.Config value passed. |
84 */ | 81 */ |
85 @CalledByNative | 82 @CalledByNative |
86 private static int bitmapConfig(Bitmap.Config bitmapConfig) { | 83 private static int getConfigEnumValue(Bitmap.Config bitmapConfig) { |
87 switch (bitmapConfig) { | 84 switch (bitmapConfig) { |
88 case ALPHA_8: | 85 case ALPHA_8: |
89 return BitmapFormat.FORMAT_ALPHA_8; | 86 return BitmapFormat.FORMAT_ALPHA_8; |
90 case ARGB_4444: | 87 case ARGB_4444: |
91 return BitmapFormat.FORMAT_ARGB_4444; | 88 return BitmapFormat.FORMAT_ARGB_4444; |
92 case ARGB_8888: | 89 case ARGB_8888: |
93 return BitmapFormat.FORMAT_ARGB_8888; | 90 return BitmapFormat.FORMAT_ARGB_8888; |
94 case RGB_565: | 91 case RGB_565: |
95 return BitmapFormat.FORMAT_RGB_565; | 92 return BitmapFormat.FORMAT_RGB_565; |
96 default: | 93 default: |
97 return BitmapFormat.FORMAT_NO_CONFIG; | 94 return BitmapFormat.FORMAT_NO_CONFIG; |
98 } | 95 } |
99 } | 96 } |
97 | |
98 /** | |
99 * Provides a matching Bitmap.Config for the enum config value passed. | |
100 * | |
101 * @param matchingenumConfig The Bitmap Configuration enum value. | |
102 * @return Matching Bitmap.Config for the enum value passed. | |
103 */ | |
104 @CalledByNative | |
bulach
2014/02/28 13:19:25
see above, I think this method can be kept private
sivag
2014/03/04 12:36:04
Done.
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105 private static Bitmap.Config getJavabitmapConfig(int matchingenumConfig) { | |
106 switch (matchingenumConfig) { | |
107 case BitmapFormat.FORMAT_ALPHA_8: | |
108 return Bitmap.Config.ALPHA_8; | |
109 case BitmapFormat.FORMAT_ARGB_4444: | |
110 return Bitmap.Config.ARGB_4444; | |
111 case BitmapFormat.FORMAT_RGB_565: | |
112 return Bitmap.Config.RGB_565; | |
113 case BitmapFormat.FORMAT_ARGB_8888: | |
114 default: | |
115 return Bitmap.Config.ARGB_8888; | |
116 } | |
117 } | |
118 | |
100 } | 119 } |
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