1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.graphics;
18
19public class PixelFormat
20{
21    /* these constants need to match those
22       in ui/PixelFormat.h & pixelflinger/format.h */
23
24    public static final int UNKNOWN     = 0;
25
26    /** System chooses a format that supports translucency (many alpha bits) */
27    public static final int TRANSLUCENT = -3;
28
29    /**
30     * System chooses a format that supports transparency
31     * (at least 1 alpha bit)
32     */
33    public static final int TRANSPARENT = -2;
34
35    /** System chooses an opaque format (no alpha bits required) */
36    public static final int OPAQUE      = -1;
37
38    public static final int RGBA_8888   = 1;
39    public static final int RGBX_8888   = 2;
40    public static final int RGB_888     = 3;
41    public static final int RGB_565     = 4;
42
43    public static final int RGBA_5551   = 6;
44    public static final int RGBA_4444   = 7;
45    public static final int A_8         = 8;
46    public static final int L_8         = 9;
47    public static final int LA_88       = 0xA;
48    public static final int RGB_332     = 0xB;
49
50    /**
51     * YCbCr formats, used for video. These are not necessarily supported
52     * by the hardware.
53     */
54    public static final int YCbCr_422_SP= 0x10;
55
56    /** YCbCr format used for images, which uses the NV21 encoding format.
57     *  This is the default format for camera preview images, when not
58     *  otherwise set with
59     *  {@link android.hardware.Camera.Parameters#setPreviewFormat(int)}.
60     */
61    public static final int YCbCr_420_SP= 0x11;
62
63    /**
64     * Encoded formats.  These are not necessarily supported by the hardware.
65     */
66    public static final int JPEG        = 0x100;
67
68    /*
69     * We use a class initializer to allow the native code to cache some
70     * field offsets.
71     */
72    native private static void nativeClassInit();
73    static { nativeClassInit(); }
74
75    public static native void getPixelFormatInfo(int format, PixelFormat info);
76    public static boolean formatHasAlpha(int format) {
77        switch (format) {
78            case PixelFormat.A_8:
79            case PixelFormat.LA_88:
80            case PixelFormat.RGBA_4444:
81            case PixelFormat.RGBA_5551:
82            case PixelFormat.RGBA_8888:
83            case PixelFormat.TRANSLUCENT:
84            case PixelFormat.TRANSPARENT:
85                return true;
86        }
87        return false;
88    }
89
90    public int  bytesPerPixel;
91    public int  bitsPerPixel;
92}
93