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 */ 176
