1 /* 2 * Copyright 2017 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 /** 18 * @file hardware_buffer.h 19 * @brief API for native hardware buffers. 20 */ 21 /** 22 * @defgroup AHardwareBuffer Native Hardware Buffer 23 * 24 * AHardwareBuffer objects represent chunks of memory that can be 25 * accessed by various hardware components in the system. It can be 26 * easily converted to the Java counterpart 27 * android.hardware.HardwareBuffer and passed between processes using 28 * Binder. All operations involving AHardwareBuffer and HardwareBuffer 29 * are zero-copy, i.e., passing AHardwareBuffer to another process 30 * creates a shared view of the same region of memory. 31 * 32 * AHardwareBuffers can be bound to EGL/OpenGL and Vulkan primitives. 33 * For EGL, use the extension function eglGetNativeClientBufferANDROID 34 * to obtain an EGLClientBuffer and pass it directly to 35 * eglCreateImageKHR. Refer to the EGL extensions 36 * EGL_ANDROID_get_native_client_buffer and 37 * EGL_ANDROID_image_native_buffer for more information. In Vulkan, 38 * the contents of the AHardwareBuffer can be accessed as external 39 * memory. See the VK_ANDROID_external_memory_android_hardware_buffer 40 * extension for details. 41 * 42 * @{ 43 */ 44 45 #ifndef ANDROID_HARDWARE_BUFFER_H 46 #define ANDROID_HARDWARE_BUFFER_H 47 48 #include <inttypes.h> 49 50 #include <sys/cdefs.h> 51 52 #include <android/rect.h> 53 54 __BEGIN_DECLS 55 56 /** 57 * Buffer pixel formats. 58 */ 59 enum AHardwareBuffer_Format { 60 /** 61 * Corresponding formats: 62 * Vulkan: VK_FORMAT_R8G8B8A8_UNORM 63 * OpenGL ES: GL_RGBA8 64 */ 65 AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM = 1, 66 67 /** 68 * 32 bits per pixel, 8 bits per channel format where alpha values are 69 * ignored (always opaque). 70 * Corresponding formats: 71 * Vulkan: VK_FORMAT_R8G8B8A8_UNORM 72 * OpenGL ES: GL_RGB8 73 */ 74 AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM = 2, 75 76 /** 77 * Corresponding formats: 78 * Vulkan: VK_FORMAT_R8G8B8_UNORM 79 * OpenGL ES: GL_RGB8 80 */ 81 AHARDWAREBUFFER_FORMAT_R8G8B8_UNORM = 3, 82 83 /** 84 * Corresponding formats: 85 * Vulkan: VK_FORMAT_R5G6B5_UNORM_PACK16 86 * OpenGL ES: GL_RGB565 87 */ 88 AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM = 4, 89 90 /** 91 * Corresponding formats: 92 * Vulkan: VK_FORMAT_R16G16B16A16_SFLOAT 93 * OpenGL ES: GL_RGBA16F 94 */ 95 AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT = 0x16, 96 97 /** 98 * Corresponding formats: 99 * Vulkan: VK_FORMAT_A2B10G10R10_UNORM_PACK32 100 * OpenGL ES: GL_RGB10_A2 101 */ 102 AHARDWAREBUFFER_FORMAT_R10G10B10A2_UNORM = 0x2b, 103 104 /** 105 * Opaque binary blob format. 106 * Must have height 1 and one layer, with width equal to the buffer 107 * size in bytes. Corresponds to Vulkan buffers and OpenGL buffer 108 * objects. Can be bound to the latter using GL_EXT_external_buffer. 109 */ 110 AHARDWAREBUFFER_FORMAT_BLOB = 0x21, 111 112 /** 113 * Corresponding formats: 114 * Vulkan: VK_FORMAT_D16_UNORM 115 * OpenGL ES: GL_DEPTH_COMPONENT16 116 */ 117 AHARDWAREBUFFER_FORMAT_D16_UNORM = 0x30, 118 119 /** 120 * Corresponding formats: 121 * Vulkan: VK_FORMAT_X8_D24_UNORM_PACK32 122 * OpenGL ES: GL_DEPTH_COMPONENT24 123 */ 124 AHARDWAREBUFFER_FORMAT_D24_UNORM = 0x31, 125 126 /** 127 * Corresponding formats: 128 * Vulkan: VK_FORMAT_D24_UNORM_S8_UINT 129 * OpenGL ES: GL_DEPTH24_STENCIL8 130 */ 131 AHARDWAREBUFFER_FORMAT_D24_UNORM_S8_UINT = 0x32, 132 133 /** 134 * Corresponding formats: 135 * Vulkan: VK_FORMAT_D32_SFLOAT 136 * OpenGL ES: GL_DEPTH_COMPONENT32F 137 */ 138 AHARDWAREBUFFER_FORMAT_D32_FLOAT = 0x33, 139 140 /** 141 * Corresponding formats: 142 * Vulkan: VK_FORMAT_D32_SFLOAT_S8_UINT 143 * OpenGL ES: GL_DEPTH32F_STENCIL8 144 */ 145 AHARDWAREBUFFER_FORMAT_D32_FLOAT_S8_UINT = 0x34, 146 147 /** 148 * Corresponding formats: 149 * Vulkan: VK_FORMAT_S8_UINT 150 * OpenGL ES: GL_STENCIL_INDEX8 151 */ 152 AHARDWAREBUFFER_FORMAT_S8_UINT = 0x35, 153 154 /** 155 * YUV 420 888 format. 156 * Must have an even width and height. Can be accessed in OpenGL 157 * shaders through an external sampler. Does not support mip-maps 158 * cube-maps or multi-layered textures. 159 */ 160 AHARDWAREBUFFER_FORMAT_Y8Cb8Cr8_420 = 0x23, 161 }; 162 163 /** 164 * Buffer usage flags, specifying how the buffer will be accessed. 165 */ 166 enum AHardwareBuffer_UsageFlags { 167 /// The buffer will never be locked for direct CPU reads using the 168 /// AHardwareBuffer_lock() function. Note that reading the buffer 169 /// using OpenGL or Vulkan functions or memory mappings is still 170 /// allowed. 171 AHARDWAREBUFFER_USAGE_CPU_READ_NEVER = 0UL, 172 /// The buffer will sometimes be locked for direct CPU reads using 173 /// the AHardwareBuffer_lock() function. Note that reading the 174 /// buffer using OpenGL or Vulkan functions or memory mappings 175 /// does not require the presence of this flag. 176 AHARDWAREBUFFER_USAGE_CPU_READ_RARELY = 2UL, 177 /// The buffer will often be locked for direct CPU reads using 178 /// the AHardwareBuffer_lock() function. Note that reading the 179 /// buffer using OpenGL or Vulkan functions or memory mappings 180 /// does not require the presence of this flag. 181 AHARDWAREBUFFER_USAGE_CPU_READ_OFTEN = 3UL, 182 /// CPU read value mask. 183 AHARDWAREBUFFER_USAGE_CPU_READ_MASK = 0xFUL, 184 185 /// The buffer will never be locked for direct CPU writes using the 186 /// AHardwareBuffer_lock() function. Note that writing the buffer 187 /// using OpenGL or Vulkan functions or memory mappings is still 188 /// allowed. 189 AHARDWAREBUFFER_USAGE_CPU_WRITE_NEVER = 0UL << 4, 190 /// The buffer will sometimes be locked for direct CPU writes using 191 /// the AHardwareBuffer_lock() function. Note that writing the 192 /// buffer using OpenGL or Vulkan functions or memory mappings 193 /// does not require the presence of this flag. 194 AHARDWAREBUFFER_USAGE_CPU_WRITE_RARELY = 2UL << 4, 195 /// The buffer will often be locked for direct CPU writes using 196 /// the AHardwareBuffer_lock() function. Note that writing the 197 /// buffer using OpenGL or Vulkan functions or memory mappings 198 /// does not require the presence of this flag. 199 AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN = 3UL << 4, 200 /// CPU write value mask. 201 AHARDWAREBUFFER_USAGE_CPU_WRITE_MASK = 0xFUL << 4, 202 203 /// The buffer will be read from by the GPU as a texture. 204 AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE = 1UL << 8, 205 /// The buffer will be written to by the GPU as a framebuffer attachment. 206 AHARDWAREBUFFER_USAGE_GPU_FRAMEBUFFER = 1UL << 9, 207 /** 208 * The buffer will be written to by the GPU as a framebuffer 209 * attachment. 210 * 211 * Note that the name of this flag is somewhat misleading: it does 212 * not imply that the buffer contains a color format. A buffer with 213 * depth or stencil format that will be used as a framebuffer 214 * attachment should also have this flag. Use the equivalent flag 215 * AHARDWAREBUFFER_USAGE_GPU_FRAMEBUFFER to avoid this confusion. 216 */ 217 AHARDWAREBUFFER_USAGE_GPU_COLOR_OUTPUT = AHARDWAREBUFFER_USAGE_GPU_FRAMEBUFFER, 218 /** 219 * The buffer will be used as a composer HAL overlay layer. 220 * 221 * This flag is currently only needed when using ASurfaceTransaction_setBuffer 222 * to set a buffer. In all other cases, the framework adds this flag 223 * internally to buffers that could be presented in a composer overlay. 224 * ASurfaceTransaction_setBuffer is special because it uses buffers allocated 225 * directly through AHardwareBuffer_allocate instead of buffers allocated 226 * by the framework. 227 */ 228 AHARDWAREBUFFER_USAGE_COMPOSER_OVERLAY = 1ULL << 11, 229 /** 230 * The buffer is protected from direct CPU access or being read by 231 * non-secure hardware, such as video encoders. 232 * 233 * This flag is incompatible with CPU read and write flags. It is 234 * mainly used when handling DRM video. Refer to the EGL extension 235 * EGL_EXT_protected_content and GL extension 236 * GL_EXT_protected_textures for more information on how these 237 * buffers are expected to behave. 238 */ 239 AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT = 1UL << 14, 240 /// The buffer will be read by a hardware video encoder. 241 AHARDWAREBUFFER_USAGE_VIDEO_ENCODE = 1UL << 16, 242 /** 243 * The buffer will be used for direct writes from sensors. 244 * When this flag is present, the format must be AHARDWAREBUFFER_FORMAT_BLOB. 245 */ 246 AHARDWAREBUFFER_USAGE_SENSOR_DIRECT_DATA = 1UL << 23, 247 /** 248 * The buffer will be used as a shader storage or uniform buffer object. 249 * When this flag is present, the format must be AHARDWAREBUFFER_FORMAT_BLOB. 250 */ 251 AHARDWAREBUFFER_USAGE_GPU_DATA_BUFFER = 1UL << 24, 252 /** 253 * The buffer will be used as a cube map texture. 254 * When this flag is present, the buffer must have a layer count 255 * that is a multiple of 6. Note that buffers with this flag must be 256 * bound to OpenGL textures using the extension 257 * GL_EXT_EGL_image_storage instead of GL_KHR_EGL_image. 258 */ 259 AHARDWAREBUFFER_USAGE_GPU_CUBE_MAP = 1UL << 25, 260 /** 261 * The buffer contains a complete mipmap hierarchy. 262 * Note that buffers with this flag must be bound to OpenGL textures using 263 * the extension GL_EXT_EGL_image_storage instead of GL_KHR_EGL_image. 264 */ 265 AHARDWAREBUFFER_USAGE_GPU_MIPMAP_COMPLETE = 1UL << 26, 266 267 AHARDWAREBUFFER_USAGE_VENDOR_0 = 1ULL << 28, 268 AHARDWAREBUFFER_USAGE_VENDOR_1 = 1ULL << 29, 269 AHARDWAREBUFFER_USAGE_VENDOR_2 = 1ULL << 30, 270 AHARDWAREBUFFER_USAGE_VENDOR_3 = 1ULL << 31, 271 AHARDWAREBUFFER_USAGE_VENDOR_4 = 1ULL << 48, 272 AHARDWAREBUFFER_USAGE_VENDOR_5 = 1ULL << 49, 273 AHARDWAREBUFFER_USAGE_VENDOR_6 = 1ULL << 50, 274 AHARDWAREBUFFER_USAGE_VENDOR_7 = 1ULL << 51, 275 AHARDWAREBUFFER_USAGE_VENDOR_8 = 1ULL << 52, 276 AHARDWAREBUFFER_USAGE_VENDOR_9 = 1ULL << 53, 277 AHARDWAREBUFFER_USAGE_VENDOR_10 = 1ULL << 54, 278 AHARDWAREBUFFER_USAGE_VENDOR_11 = 1ULL << 55, 279 AHARDWAREBUFFER_USAGE_VENDOR_12 = 1ULL << 56, 280 AHARDWAREBUFFER_USAGE_VENDOR_13 = 1ULL << 57, 281 AHARDWAREBUFFER_USAGE_VENDOR_14 = 1ULL << 58, 282 AHARDWAREBUFFER_USAGE_VENDOR_15 = 1ULL << 59, 283 AHARDWAREBUFFER_USAGE_VENDOR_16 = 1ULL << 60, 284 AHARDWAREBUFFER_USAGE_VENDOR_17 = 1ULL << 61, 285 AHARDWAREBUFFER_USAGE_VENDOR_18 = 1ULL << 62, 286 AHARDWAREBUFFER_USAGE_VENDOR_19 = 1ULL << 63, 287 }; 288 289 /** 290 * Buffer description. Used for allocating new buffers and querying 291 * parameters of existing ones. 292 */ 293 typedef struct AHardwareBuffer_Desc { 294 uint32_t width; ///< Width in pixels. 295 uint32_t height; ///< Height in pixels. 296 /** 297 * Number of images in an image array. AHardwareBuffers with one 298 * layer correspond to regular 2D textures. AHardwareBuffers with 299 * more than layer correspond to texture arrays. If the layer count 300 * is a multiple of 6 and the usage flag 301 * AHARDWAREBUFFER_USAGE_GPU_CUBE_MAP is present, the buffer is 302 * a cube map or a cube map array. 303 */ 304 uint32_t layers; 305 uint32_t format; ///< One of AHardwareBuffer_Format. 306 uint64_t usage; ///< Combination of AHardwareBuffer_UsageFlags. 307 uint32_t stride; ///< Row stride in pixels, ignored for AHardwareBuffer_allocate() 308 uint32_t rfu0; ///< Initialize to zero, reserved for future use. 309 uint64_t rfu1; ///< Initialize to zero, reserved for future use. 310 } AHardwareBuffer_Desc; 311 312 /** 313 * Holds data for a single image plane. 314 */ 315 typedef struct AHardwareBuffer_Plane { 316 void* data; ///< Points to first byte in plane 317 uint32_t pixelStride; ///< Distance in bytes from the color channel of one pixel to the next 318 uint32_t rowStride; ///< Distance in bytes from the first value of one row of the image to 319 /// the first value of the next row. 320 } AHardwareBuffer_Plane; 321 322 /** 323 * Holds all image planes that contain the pixel data. 324 */ 325 typedef struct AHardwareBuffer_Planes { 326 uint32_t planeCount; ///< Number of distinct planes 327 AHardwareBuffer_Plane planes[4]; ///< Array of image planes 328 } AHardwareBuffer_Planes; 329 330 /** 331 * Opaque handle for a native hardware buffer. 332 */ 333 typedef struct AHardwareBuffer AHardwareBuffer; 334 335 #if __ANDROID_API__ >= 26 336 337 /** 338 * Allocates a buffer that matches the passed AHardwareBuffer_Desc. 339 * 340 * If allocation succeeds, the buffer can be used according to the 341 * usage flags specified in its description. If a buffer is used in ways 342 * not compatible with its usage flags, the results are undefined and 343 * may include program termination. 344 * 345 * Available since API level 26. 346 * 347 * \return 0 on success, or an error number of the allocation fails for 348 * any reason. The returned buffer has a reference count of 1. 349 */ 350 int AHardwareBuffer_allocate(const AHardwareBuffer_Desc* desc, 351 AHardwareBuffer** outBuffer) __INTRODUCED_IN(26); 352 /** 353 * Acquire a reference on the given AHardwareBuffer object. 354 * 355 * This prevents the object from being deleted until the last reference 356 * is removed. 357 * 358 * Available since API level 26. 359 */ 360 void AHardwareBuffer_acquire(AHardwareBuffer* buffer) __INTRODUCED_IN(26); 361 362 /** 363 * Remove a reference that was previously acquired with 364 * AHardwareBuffer_acquire() or AHardwareBuffer_allocate(). 365 * 366 * Available since API level 26. 367 */ 368 void AHardwareBuffer_release(AHardwareBuffer* buffer) __INTRODUCED_IN(26); 369 370 /** 371 * Return a description of the AHardwareBuffer in the passed 372 * AHardwareBuffer_Desc struct. 373 * 374 * Available since API level 26. 375 */ 376 void AHardwareBuffer_describe(const AHardwareBuffer* buffer, 377 AHardwareBuffer_Desc* outDesc) __INTRODUCED_IN(26); 378 379 /** 380 * Lock the AHardwareBuffer for direct CPU access. 381 * 382 * This function can lock the buffer for either reading or writing. 383 * It may block if the hardware needs to finish rendering, if CPU caches 384 * need to be synchronized, or possibly for other implementation- 385 * specific reasons. 386 * 387 * The passed AHardwareBuffer must have one layer, otherwise the call 388 * will fail. 389 * 390 * If \a fence is not negative, it specifies a fence file descriptor on 391 * which to wait before locking the buffer. If it's negative, the caller 392 * is responsible for ensuring that writes to the buffer have completed 393 * before calling this function. Using this parameter is more efficient 394 * than waiting on the fence and then calling this function. 395 * 396 * The \a usage parameter may only specify AHARDWAREBUFFER_USAGE_CPU_*. 397 * If set, then outVirtualAddress is filled with the address of the 398 * buffer in virtual memory. The flags must also be compatible with 399 * usage flags specified at buffer creation: if a read flag is passed, 400 * the buffer must have been created with 401 * AHARDWAREBUFFER_USAGE_CPU_READ_RARELY or 402 * AHARDWAREBUFFER_USAGE_CPU_READ_OFTEN. If a write flag is passed, it 403 * must have been created with AHARDWAREBUFFER_USAGE_CPU_WRITE_RARELY or 404 * AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN. 405 * 406 * If \a rect is not NULL, the caller promises to modify only data in 407 * the area specified by rect. If rect is NULL, the caller may modify 408 * the contents of the entire buffer. The content of the buffer outside 409 * of the specified rect is NOT modified by this call. 410 * 411 * It is legal for several different threads to lock a buffer for read 412 * access; none of the threads are blocked. 413 * 414 * Locking a buffer simultaneously for write or read/write is undefined, 415 * but will neither terminate the process nor block the caller. 416 * AHardwareBuffer_lock may return an error or leave the buffer's 417 * content in an indeterminate state. 418 * 419 * If the buffer has AHARDWAREBUFFER_FORMAT_BLOB, it is legal lock it 420 * for reading and writing in multiple threads and/or processes 421 * simultaneously, and the contents of the buffer behave like shared 422 * memory. 423 * 424 * Available since API level 26. 425 * 426 * \return 0 on success. -EINVAL if \a buffer is NULL, the usage flags 427 * are not a combination of AHARDWAREBUFFER_USAGE_CPU_*, or the buffer 428 * has more than one layer. Error number if the lock fails for any other 429 * reason. 430 */ 431 int AHardwareBuffer_lock(AHardwareBuffer* buffer, uint64_t usage, 432 int32_t fence, const ARect* rect, void** outVirtualAddress) __INTRODUCED_IN(26); 433 434 /** 435 * Lock a potentially multi-planar AHardwareBuffer for direct CPU access. 436 * 437 * This function is similar to AHardwareBuffer_lock, but can lock multi-planar 438 * formats. The locked planes are returned in the \a outPlanes argument. Note, 439 * that multi-planar should not be confused with multi-layer images, which this 440 * locking function does not support. 441 * 442 * YUV formats are always represented by three separate planes of data, one for 443 * each color plane. The order of planes in the array is guaranteed such that 444 * plane #0 is always Y, plane #1 is always U (Cb), and plane #2 is always V 445 * (Cr). All other formats are represented by a single plane. 446 * 447 * Additional information always accompanies the buffers, describing the row 448 * stride and the pixel stride for each plane. 449 * 450 * In case the buffer cannot be locked, \a outPlanes will contain zero planes. 451 * 452 * See the AHardwareBuffer_lock documentation for all other locking semantics. 453 * 454 * Available since API level 29. 455 * 456 * \return 0 on success. -EINVAL if \a buffer is NULL, the usage flags 457 * are not a combination of AHARDWAREBUFFER_USAGE_CPU_*, or the buffer 458 * has more than one layer. Error number if the lock fails for any other 459 * reason. 460 */ 461 int AHardwareBuffer_lockPlanes(AHardwareBuffer* buffer, uint64_t usage, 462 int32_t fence, const ARect* rect, AHardwareBuffer_Planes* outPlanes) __INTRODUCED_IN(29); 463 464 /** 465 * Unlock the AHardwareBuffer from direct CPU access. 466 * 467 * Must be called after all changes to the buffer are completed by the 468 * caller. If \a fence is NULL, the function will block until all work 469 * is completed. Otherwise, \a fence will be set either to a valid file 470 * descriptor or to -1. The file descriptor will become signaled once 471 * the unlocking is complete and buffer contents are updated. 472 * The caller is responsible for closing the file descriptor once it's 473 * no longer needed. The value -1 indicates that unlocking has already 474 * completed before the function returned and no further operations are 475 * necessary. 476 * 477 * Available since API level 26. 478 * 479 * \return 0 on success. -EINVAL if \a buffer is NULL. Error number if 480 * the unlock fails for any reason. 481 */ 482 int AHardwareBuffer_unlock(AHardwareBuffer* buffer, int32_t* fence) __INTRODUCED_IN(26); 483 484 /** 485 * Send the AHardwareBuffer to an AF_UNIX socket. 486 * 487 * Available since API level 26. 488 * 489 * \return 0 on success, -EINVAL if \a buffer is NULL, or an error 490 * number if the operation fails for any reason. 491 */ 492 int AHardwareBuffer_sendHandleToUnixSocket(const AHardwareBuffer* buffer, int socketFd) __INTRODUCED_IN(26); 493 494 /** 495 * Receive an AHardwareBuffer from an AF_UNIX socket. 496 * 497 * Available since API level 26. 498 * 499 * \return 0 on success, -EINVAL if \a outBuffer is NULL, or an error 500 * number if the operation fails for any reason. 501 */ 502 int AHardwareBuffer_recvHandleFromUnixSocket(int socketFd, AHardwareBuffer** outBuffer) __INTRODUCED_IN(26); 503 504 #endif // __ANDROID_API__ >= 26 505 506 #if __ANDROID_API__ >= 29 507 508 /** 509 * Test whether the given format and usage flag combination is 510 * allocatable. 511 * 512 * If this function returns true, it means that a buffer with the given 513 * description can be allocated on this implementation, unless resource 514 * exhaustion occurs. If this function returns false, it means that the 515 * allocation of the given description will never succeed. 516 * 517 * The return value of this function may depend on all fields in the 518 * description, except stride, which is always ignored. For example, 519 * some implementations have implementation-defined limits on texture 520 * size and layer count. 521 * 522 * Available since API level 29. 523 * 524 * \return 1 if the format and usage flag combination is allocatable, 525 * 0 otherwise. 526 */ 527 int AHardwareBuffer_isSupported(const AHardwareBuffer_Desc* desc) __INTRODUCED_IN(29); 528 529 /** 530 * Lock an AHardwareBuffer for direct CPU access. 531 * 532 * This function is the same as the above lock function, but passes back 533 * additional information about the bytes per pixel and the bytes per stride 534 * of the locked buffer. If the bytes per pixel or bytes per stride are unknown 535 * or variable, or if the underlying mapper implementation does not support returning 536 * additional information, then this call will fail with INVALID_OPERATION 537 * 538 * Available since API level 29. 539 */ 540 int AHardwareBuffer_lockAndGetInfo(AHardwareBuffer* buffer, uint64_t usage, 541 int32_t fence, const ARect* rect, void** outVirtualAddress, 542 int32_t* outBytesPerPixel, int32_t* outBytesPerStride) __INTRODUCED_IN(29); 543 #endif // __ANDROID_API__ >= 29 544 545 __END_DECLS 546 547 #endif // ANDROID_HARDWARE_BUFFER_H 548 549 /** @} */ 550