| 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 | #ifdef __cplusplus |
| 21 | extern "C" { |
| 22 | #endif |
| 23 | |
| 24 | /* |
| 25 | * If the HAL needs to create service threads to handle graphics related |
| 26 | * tasks, these threads need to run at HAL_PRIORITY_URGENT_DISPLAY priority |
| 27 | * if they can block the main rendering thread in any way. |
| 28 | * |
| 29 | * the priority of the current thread can be set with: |
| 30 | * |
| 31 | * #include <sys/resource.h> |
| 32 | * setpriority(PRIO_PROCESS, 0, HAL_PRIORITY_URGENT_DISPLAY); |
| 33 | * |
| 34 | */ |
| 35 | |
| 36 | #define HAL_PRIORITY_URGENT_DISPLAY (-8) |
| 37 | |
| 38 | /** |
| 39 | * pixel format definitions |
| 40 | */ |
| 41 | |
| 42 | enum { |
| 43 | HAL_PIXEL_FORMAT_RGBA_8888 = 1, |
| 44 | HAL_PIXEL_FORMAT_RGBX_8888 = 2, |
| 45 | HAL_PIXEL_FORMAT_RGB_888 = 3, |
| 46 | HAL_PIXEL_FORMAT_RGB_565 = 4, |
| 47 | HAL_PIXEL_FORMAT_BGRA_8888 = 5, |
| 48 | HAL_PIXEL_FORMAT_RGBA_5551 = 6, |
| 49 | HAL_PIXEL_FORMAT_RGBA_4444 = 7, |
| 50 | |
| 51 | /* 0x8 - 0xFF range unavailable */ |
| 52 | |
| 53 | /* |
| 54 | * 0x100 - 0x1FF |
| 55 | * |
| 56 | * This range is reserved for pixel formats that are specific to the HAL |
| 57 | * implementation. Implementations can use any value in this range to |
| 58 | * communicate video pixel formats between their HAL modules. These formats |
| 59 | * must not have an alpha channel. Additionally, an EGLimage created from a |
| 60 | * gralloc buffer of one of these formats must be supported for use with the |
| 61 | * GL_OES_EGL_image_external OpenGL ES extension. |
| 62 | */ |
| 63 | |
| 64 | /* |
| 65 | * Android YUV format: |
| 66 | * |
| 67 | * This format is exposed outside of the HAL to software decoders and |
| 68 | * applications. EGLImageKHR must support it in conjunction with the |
| 69 | * OES_EGL_image_external extension. |
| 70 | * |
| 71 | * YV12 is a 4:2:0 YCrCb planar format comprised of a WxH Y plane followed |
| 72 | * by (W/2) x (H/2) Cr and Cb planes. |
| 73 | * |
| 74 | * This format assumes |
| 75 | * - an even width |
| 76 | * - an even height |
| 77 | * - a horizontal stride multiple of 16 pixels |
| 78 | * - a vertical stride equal to the height |
| 79 | * |
| 80 | * y_size = stride * height |
| 81 | * c_stride = ALIGN(stride/2, 16) |
| 82 | * c_size = c_stride * height/2 |
| 83 | * size = y_size + c_size * 2 |
| 84 | * cr_offset = y_size |
| 85 | * cb_offset = y_size + c_size |
| 86 | * |
| 87 | */ |
| 88 | HAL_PIXEL_FORMAT_YV12 = 0x32315659, // YCrCb 4:2:0 Planar |
| 89 | |
| 90 | /* |
| 91 | * Android RAW sensor format: |
| 92 | * |
| 93 | * This format is exposed outside of the HAL to applications. |
| 94 | * |
| 95 | * RAW_SENSOR is a single-channel 16-bit format, typically representing raw |
| 96 | * Bayer-pattern images from an image sensor, with minimal processing. |
| 97 | * |
| 98 | * The exact pixel layout of the data in the buffer is sensor-dependent, and |
| 99 | * needs to be queried from the camera device. |
| 100 | * |
| 101 | * Generally, not all 16 bits are used; more common values are 10 or 12 |
| 102 | * bits. All parameters to interpret the raw data (black and white points, |
| 103 | * color space, etc) must be queried from the camera device. |
| 104 | * |
| 105 | * This format assumes |
| 106 | * - an even width |
| 107 | * - an even height |
| 108 | * - a horizontal stride multiple of 16 pixels (32 bytes). |
| 109 | */ |
| 110 | HAL_PIXEL_FORMAT_RAW_SENSOR = 0x20, |
| 111 | |
| 112 | /* |
| 113 | * Android binary blob graphics buffer format: |
| 114 | * |
| 115 | * This format is used to carry task-specific data which does not have a |
| 116 | * standard image structure. The details of the format are left to the two |
| 117 | * endpoints. |
| 118 | * |
| 119 | * A typical use case is for transporting JPEG-compressed images from the |
| 120 | * Camera HAL to the framework or to applications. |
| 121 | * |
| 122 | * Buffers of this format must have a height of 1, and width equal to their |
| 123 | * size in bytes. |
| 124 | */ |
| 125 | HAL_PIXEL_FORMAT_BLOB = 0x21, |
| 126 | |
| 127 | /* |
| 128 | * Android format indicating that the choice of format is entirely up to the |
| 129 | * device-specific Gralloc implementation. |
| 130 | * |
| 131 | * The Gralloc implementation should examine the usage bits passed in when |
| 132 | * allocating a buffer with this format, and it should derive the pixel |
| 133 | * format from those usage flags. This format will never be used with any |
| 134 | * of the GRALLOC_USAGE_SW_* usage flags. |
| 135 | * |
| 136 | * If a buffer of this format is to be used as an OpenGL ES texture, the |
| 137 | * framework will assume that sampling the texture will always return an |
| 138 | * alpha value of 1.0 (i.e. the buffer contains only opaque pixel values). |
| 139 | * |
| 140 | */ |
| 141 | HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED = 0x22, |
| 142 | |
| 143 | /* Legacy formats (deprecated), used by ImageFormat.java */ |
| 144 | HAL_PIXEL_FORMAT_YCbCr_422_SP = 0x10, // NV16 |
| 145 | HAL_PIXEL_FORMAT_YCrCb_420_SP = 0x11, // NV21 |
| 146 | HAL_PIXEL_FORMAT_YCbCr_422_I = 0x14, // YUY2 |
| 147 | }; |
| 148 | |
| 149 | |
| 150 | /** |
| 151 | * Transformation definitions |
| 152 | * |
| 153 | * IMPORTANT NOTE: |
| 154 | * HAL_TRANSFORM_ROT_90 is applied CLOCKWISE and AFTER HAL_TRANSFORM_FLIP_{H|V}. |
| 155 | * |
| 156 | */ |
| 157 | |
| 158 | enum { |
| 159 | /* flip source image horizontally (around the vertical axis) */ |
| 160 | HAL_TRANSFORM_FLIP_H = 0x01, |
| 161 | /* flip source image vertically (around the horizontal axis)*/ |
| 162 | HAL_TRANSFORM_FLIP_V = 0x02, |
| 163 | /* rotate source image 90 degrees clockwise */ |
| 164 | HAL_TRANSFORM_ROT_90 = 0x04, |
| 165 | /* rotate source image 180 degrees */ |
| 166 | HAL_TRANSFORM_ROT_180 = 0x03, |
| 167 | /* rotate source image 270 degrees clockwise */ |
| 168 | HAL_TRANSFORM_ROT_270 = 0x07, |
| 169 | }; |
| 170 | |
| 171 | #ifdef __cplusplus |
| 172 | } |
| 173 | #endif |
| 174 | |
| 175 | #endif /* SYSTEM_CORE_INCLUDE_ANDROID_GRAPHICS_H */ |