graphics.h revision da1a1f629b0f3b3a63d9951de4381a41bc31fb91 
1/*
2 * Copyright (C) 2011 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
17#ifndef SYSTEM_CORE_INCLUDE_ANDROID_GRAPHICS_H
18#define SYSTEM_CORE_INCLUDE_ANDROID_GRAPHICS_H
19
20__BEGIN_DECLS
21
22/**
23 * pixel format definitions
24 */
25
26enum {
27    HAL_PIXEL_FORMAT_RGBA_8888          = 1,
28    HAL_PIXEL_FORMAT_RGBX_8888          = 2,
29    HAL_PIXEL_FORMAT_RGB_888            = 3,
30    HAL_PIXEL_FORMAT_RGB_565            = 4,
31    HAL_PIXEL_FORMAT_BGRA_8888          = 5,
32    HAL_PIXEL_FORMAT_RGBA_5551          = 6,
33    HAL_PIXEL_FORMAT_RGBA_4444          = 7,
34
35    /* 0x8 - 0xFF range unavailable */
36
37    /*
38     * 0x100 - 0x1FF
39     *
40     * This range is reserved for pixel formats that are specific to the HAL
41     * implementation.  Implementations can use any value in this range to
42     * communicate video pixel formats between their HAL modules.  These formats
43     * must not have an alpha channel.  Additionally, an EGLimage created from a
44     * gralloc buffer of one of these formats must be supported for use with the
45     * GL_OES_EGL_image_external OpenGL ES extension.
46     */
47
48    /*
49     * Android YUV format:
50     *
51     * This format is exposed outside of the HAL to software decoders and
52     * applications.  EGLImageKHR must support it in conjunction with the
53     * OES_EGL_image_external extension.
54     *
55     * YV12 is a 4:2:0 YCrCb planar format comprised of a WxH Y plane followed
56     * by (W/2) x (H/2) Cr and Cb planes.
57     *
58     * This format assumes
59     * - an even width
60     * - an even height
61     * - a horizontal stride multiple of 16 pixels
62     * - a vertical stride equal to the height
63     *
64     *   y_size = stride * height
65     *   c_size = ALIGN(stride/2, 16) * height/2
66     *   size = y_size + c_size * 2
67     *   cr_offset = y_size
68     *   cb_offset = y_size + c_size
69     *
70     */
71    HAL_PIXEL_FORMAT_YV12   = 0x32315659, // YCrCb 4:2:0 Planar
72
73
74
75    /* Legacy formats (deprecated), used by ImageFormat.java */
76    HAL_PIXEL_FORMAT_YCbCr_422_SP       = 0x10, // NV16
77    HAL_PIXEL_FORMAT_YCrCb_420_SP       = 0x11, // NV21
78    HAL_PIXEL_FORMAT_YCbCr_422_I        = 0x14, // YUY2
79};
80
81
82/**
83 * Transformation definitions
84 *
85 * IMPORTANT NOTE:
86 * HAL_TRANSFORM_ROT_90 is applied CLOCKWISE and AFTER HAL_TRANSFORM_FLIP_{H|V}.
87 *
88 */
89
90enum {
91    /* flip source image horizontally (around the vertical axis) */
92    HAL_TRANSFORM_FLIP_H    = 0x01,
93    /* flip source image vertically (around the horizontal axis)*/
94    HAL_TRANSFORM_FLIP_V    = 0x02,
95    /* rotate source image 90 degrees clockwise */
96    HAL_TRANSFORM_ROT_90    = 0x04,
97    /* rotate source image 180 degrees */
98    HAL_TRANSFORM_ROT_180   = 0x03,
99    /* rotate source image 270 degrees clockwise */
100    HAL_TRANSFORM_ROT_270   = 0x07,
101};
102
103__END_DECLS
104
105#endif /* SYSTEM_CORE_INCLUDE_ANDROID_GRAPHICS_H */
106