window.h revision 5423e9e4ce52a45ac42419f1467e79ba9e62298f
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_WINDOW_H 18#define SYSTEM_CORE_INCLUDE_ANDROID_WINDOW_H 19 20#include <stdint.h> 21#include <sys/cdefs.h> 22#include <system/graphics.h> 23#include <cutils/native_handle.h> 24 25__BEGIN_DECLS 26 27/*****************************************************************************/ 28 29#define ANDROID_NATIVE_MAKE_CONSTANT(a,b,c,d) \ 30 (((unsigned)(a)<<24)|((unsigned)(b)<<16)|((unsigned)(c)<<8)|(unsigned)(d)) 31 32#define ANDROID_NATIVE_WINDOW_MAGIC \ 33 ANDROID_NATIVE_MAKE_CONSTANT('_','w','n','d') 34 35#define ANDROID_NATIVE_BUFFER_MAGIC \ 36 ANDROID_NATIVE_MAKE_CONSTANT('_','b','f','r') 37 38// --------------------------------------------------------------------------- 39 40typedef const native_handle_t* buffer_handle_t; 41 42// --------------------------------------------------------------------------- 43 44typedef struct android_native_rect_t 45{ 46 int32_t left; 47 int32_t top; 48 int32_t right; 49 int32_t bottom; 50} android_native_rect_t; 51 52// --------------------------------------------------------------------------- 53 54typedef struct android_native_base_t 55{ 56 /* a magic value defined by the actual EGL native type */ 57 int magic; 58 59 /* the sizeof() of the actual EGL native type */ 60 int version; 61 62 void* reserved[4]; 63 64 /* reference-counting interface */ 65 void (*incRef)(struct android_native_base_t* base); 66 void (*decRef)(struct android_native_base_t* base); 67} android_native_base_t; 68 69typedef struct ANativeWindowBuffer 70{ 71#ifdef __cplusplus 72 ANativeWindowBuffer() { 73 common.magic = ANDROID_NATIVE_BUFFER_MAGIC; 74 common.version = sizeof(ANativeWindowBuffer); 75 memset(common.reserved, 0, sizeof(common.reserved)); 76 } 77 78 // Implement the methods that sp<ANativeWindowBuffer> expects so that it 79 // can be used to automatically refcount ANativeWindowBuffer's. 80 void incStrong(const void* id) const { 81 common.incRef(const_cast<android_native_base_t*>(&common)); 82 } 83 void decStrong(const void* id) const { 84 common.decRef(const_cast<android_native_base_t*>(&common)); 85 } 86#endif 87 88 struct android_native_base_t common; 89 90 int width; 91 int height; 92 int stride; 93 int format; 94 int usage; 95 96 void* reserved[2]; 97 98 buffer_handle_t handle; 99 100 void* reserved_proc[8]; 101} ANativeWindowBuffer_t; 102 103// Old typedef for backwards compatibility. 104typedef ANativeWindowBuffer_t android_native_buffer_t; 105 106// --------------------------------------------------------------------------- 107 108/* attributes queriable with query() */ 109enum { 110 NATIVE_WINDOW_WIDTH = 0, 111 NATIVE_WINDOW_HEIGHT, 112 NATIVE_WINDOW_FORMAT, 113 114 /* The minimum number of buffers that must remain un-dequeued after a buffer 115 * has been queued. This value applies only if set_buffer_count was used to 116 * override the number of buffers and if a buffer has since been queued. 117 * Users of the set_buffer_count ANativeWindow method should query this 118 * value before calling set_buffer_count. If it is necessary to have N 119 * buffers simultaneously dequeued as part of the steady-state operation, 120 * and this query returns M then N+M buffers should be requested via 121 * native_window_set_buffer_count. 122 * 123 * Note that this value does NOT apply until a single buffer has been 124 * queued. In particular this means that it is possible to: 125 * 126 * 1. Query M = min undequeued buffers 127 * 2. Set the buffer count to N + M 128 * 3. Dequeue all N + M buffers 129 * 4. Cancel M buffers 130 * 5. Queue, dequeue, queue, dequeue, ad infinitum 131 */ 132 NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, 133 134 /* Check whether queueBuffer operations on the ANativeWindow send the buffer 135 * to the window compositor. The query sets the returned 'value' argument 136 * to 1 if the ANativeWindow DOES send queued buffers directly to the window 137 * compositor and 0 if the buffers do not go directly to the window 138 * compositor. 139 * 140 * This can be used to determine whether protected buffer content should be 141 * sent to the ANativeWindow. Note, however, that a result of 1 does NOT 142 * indicate that queued buffers will be protected from applications or users 143 * capturing their contents. If that behavior is desired then some other 144 * mechanism (e.g. the GRALLOC_USAGE_PROTECTED flag) should be used in 145 * conjunction with this query. 146 */ 147 NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER, 148 149 /* Get the concrete type of a ANativeWindow. See below for the list of 150 * possible return values. 151 * 152 * This query should not be used outside the Android framework and will 153 * likely be removed in the near future. 154 */ 155 NATIVE_WINDOW_CONCRETE_TYPE, 156}; 157 158/* valid operations for the (*perform)() hook */ 159enum { 160 NATIVE_WINDOW_SET_USAGE = 0, 161 NATIVE_WINDOW_CONNECT, 162 NATIVE_WINDOW_DISCONNECT, 163 NATIVE_WINDOW_SET_CROP, 164 NATIVE_WINDOW_SET_BUFFER_COUNT, 165 NATIVE_WINDOW_SET_BUFFERS_GEOMETRY, 166 NATIVE_WINDOW_SET_BUFFERS_TRANSFORM, 167 NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP, 168 NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS, 169 NATIVE_WINDOW_SET_BUFFERS_FORMAT, 170}; 171 172/* parameter for NATIVE_WINDOW_[DIS]CONNECT */ 173enum { 174 /* Buffers will be queued by EGL via eglSwapBuffers after being filled using 175 * OpenGL ES. 176 */ 177 NATIVE_WINDOW_API_EGL = 1, 178 179 /* Buffers will be queued after being filled using the CPU 180 */ 181 NATIVE_WINDOW_API_CPU = 2, 182 183 /* Buffers will be queued by Stagefright after being filled by a video 184 * decoder. The video decoder can either be a software or hardware decoder. 185 */ 186 NATIVE_WINDOW_API_MEDIA = 3, 187 188 /* Buffers will be queued by the the camera HAL. 189 */ 190 NATIVE_WINDOW_API_CAMERA = 4, 191}; 192 193/* parameter for NATIVE_WINDOW_SET_BUFFERS_TRANSFORM */ 194enum { 195 /* flip source image horizontally */ 196 NATIVE_WINDOW_TRANSFORM_FLIP_H = HAL_TRANSFORM_FLIP_H , 197 /* flip source image vertically */ 198 NATIVE_WINDOW_TRANSFORM_FLIP_V = HAL_TRANSFORM_FLIP_V, 199 /* rotate source image 90 degrees clock-wise */ 200 NATIVE_WINDOW_TRANSFORM_ROT_90 = HAL_TRANSFORM_ROT_90, 201 /* rotate source image 180 degrees */ 202 NATIVE_WINDOW_TRANSFORM_ROT_180 = HAL_TRANSFORM_ROT_180, 203 /* rotate source image 270 degrees clock-wise */ 204 NATIVE_WINDOW_TRANSFORM_ROT_270 = HAL_TRANSFORM_ROT_270, 205}; 206 207/* values returned by the NATIVE_WINDOW_CONCRETE_TYPE query */ 208enum { 209 NATIVE_WINDOW_FRAMEBUFFER, // FramebufferNativeWindow 210 NATIVE_WINDOW_SURFACE, // Surface 211 NATIVE_WINDOW_SURFACE_TEXTURE_CLIENT, // SurfaceTextureClient 212}; 213 214/* parameter for NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP 215 * 216 * Special timestamp value to indicate that timestamps should be auto-generated 217 * by the native window when queueBuffer is called. This is equal to INT64_MIN, 218 * defined directly to avoid problems with C99/C++ inclusion of stdint.h. 219 */ 220static const int64_t NATIVE_WINDOW_TIMESTAMP_AUTO = (-9223372036854775807LL-1); 221 222struct ANativeWindow 223{ 224#ifdef __cplusplus 225 ANativeWindow() 226 : flags(0), minSwapInterval(0), maxSwapInterval(0), xdpi(0), ydpi(0) 227 { 228 common.magic = ANDROID_NATIVE_WINDOW_MAGIC; 229 common.version = sizeof(ANativeWindow); 230 memset(common.reserved, 0, sizeof(common.reserved)); 231 } 232 233 // Implement the methods that sp<ANativeWindow> expects so that it 234 // can be used to automatically refcount ANativeWindow's. 235 void incStrong(const void* id) const { 236 common.incRef(const_cast<android_native_base_t*>(&common)); 237 } 238 void decStrong(const void* id) const { 239 common.decRef(const_cast<android_native_base_t*>(&common)); 240 } 241#endif 242 243 struct android_native_base_t common; 244 245 /* flags describing some attributes of this surface or its updater */ 246 const uint32_t flags; 247 248 /* min swap interval supported by this updated */ 249 const int minSwapInterval; 250 251 /* max swap interval supported by this updated */ 252 const int maxSwapInterval; 253 254 /* horizontal and vertical resolution in DPI */ 255 const float xdpi; 256 const float ydpi; 257 258 /* Some storage reserved for the OEM's driver. */ 259 intptr_t oem[4]; 260 261 /* 262 * Set the swap interval for this surface. 263 * 264 * Returns 0 on success or -errno on error. 265 */ 266 int (*setSwapInterval)(struct ANativeWindow* window, 267 int interval); 268 269 /* 270 * hook called by EGL to acquire a buffer. After this call, the buffer 271 * is not locked, so its content cannot be modified. 272 * this call may block if no buffers are available. 273 * 274 * Returns 0 on success or -errno on error. 275 */ 276 int (*dequeueBuffer)(struct ANativeWindow* window, 277 struct ANativeWindowBuffer** buffer); 278 279 /* 280 * hook called by EGL to lock a buffer. This MUST be called before modifying 281 * the content of a buffer. The buffer must have been acquired with 282 * dequeueBuffer first. 283 * 284 * Returns 0 on success or -errno on error. 285 */ 286 int (*lockBuffer)(struct ANativeWindow* window, 287 struct ANativeWindowBuffer* buffer); 288 /* 289 * hook called by EGL when modifications to the render buffer are done. 290 * This unlocks and post the buffer. 291 * 292 * Buffers MUST be queued in the same order than they were dequeued. 293 * 294 * Returns 0 on success or -errno on error. 295 */ 296 int (*queueBuffer)(struct ANativeWindow* window, 297 struct ANativeWindowBuffer* buffer); 298 299 /* 300 * hook used to retrieve information about the native window. 301 * 302 * Returns 0 on success or -errno on error. 303 */ 304 int (*query)(const struct ANativeWindow* window, 305 int what, int* value); 306 307 /* 308 * hook used to perform various operations on the surface. 309 * (*perform)() is a generic mechanism to add functionality to 310 * ANativeWindow while keeping backward binary compatibility. 311 * 312 * DO NOT CALL THIS HOOK DIRECTLY. Instead, use the helper functions 313 * defined below. 314 * 315 * (*perform)() returns -ENOENT if the 'what' parameter is not supported 316 * by the surface's implementation. 317 * 318 * The valid operations are: 319 * NATIVE_WINDOW_SET_USAGE 320 * NATIVE_WINDOW_CONNECT 321 * NATIVE_WINDOW_DISCONNECT 322 * NATIVE_WINDOW_SET_CROP 323 * NATIVE_WINDOW_SET_BUFFER_COUNT 324 * NATIVE_WINDOW_SET_BUFFERS_GEOMETRY 325 * NATIVE_WINDOW_SET_BUFFERS_TRANSFORM 326 * NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP 327 * NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS 328 * NATIVE_WINDOW_SET_BUFFERS_FORMAT 329 * 330 */ 331 332 int (*perform)(struct ANativeWindow* window, 333 int operation, ... ); 334 335 /* 336 * hook used to cancel a buffer that has been dequeued. 337 * No synchronization is performed between dequeue() and cancel(), so 338 * either external synchronization is needed, or these functions must be 339 * called from the same thread. 340 */ 341 int (*cancelBuffer)(struct ANativeWindow* window, 342 struct ANativeWindowBuffer* buffer); 343 344 345 void* reserved_proc[2]; 346}; 347 348 /* Backwards compatibility: use ANativeWindow (struct ANativeWindow in C). 349 * android_native_window_t is deprecated. 350 */ 351typedef struct ANativeWindow ANativeWindow; 352typedef struct ANativeWindow android_native_window_t; 353 354/* 355 * native_window_set_usage(..., usage) 356 * Sets the intended usage flags for the next buffers 357 * acquired with (*lockBuffer)() and on. 358 * By default (if this function is never called), a usage of 359 * GRALLOC_USAGE_HW_RENDER | GRALLOC_USAGE_HW_TEXTURE 360 * is assumed. 361 * Calling this function will usually cause following buffers to be 362 * reallocated. 363 */ 364 365static inline int native_window_set_usage( 366 struct ANativeWindow* window, int usage) 367{ 368 return window->perform(window, NATIVE_WINDOW_SET_USAGE, usage); 369} 370 371/* 372 * native_window_connect(..., NATIVE_WINDOW_API_EGL) 373 * Must be called by EGL when the window is made current. 374 * Returns -EINVAL if for some reason the window cannot be connected, which 375 * can happen if it's connected to some other API. 376 */ 377static inline int native_window_connect( 378 struct ANativeWindow* window, int api) 379{ 380 return window->perform(window, NATIVE_WINDOW_CONNECT, api); 381} 382 383/* 384 * native_window_disconnect(..., NATIVE_WINDOW_API_EGL) 385 * Must be called by EGL when the window is made not current. 386 * An error is returned if for instance the window wasn't connected in the 387 * first place. 388 */ 389static inline int native_window_disconnect( 390 struct ANativeWindow* window, int api) 391{ 392 return window->perform(window, NATIVE_WINDOW_DISCONNECT, api); 393} 394 395/* 396 * native_window_set_crop(..., crop) 397 * Sets which region of the next queued buffers needs to be considered. 398 * A buffer's crop region is scaled to match the surface's size. 399 * 400 * The specified crop region applies to all buffers queued after it is called. 401 * 402 * if 'crop' is NULL, subsequently queued buffers won't be cropped. 403 * 404 * An error is returned if for instance the crop region is invalid, 405 * out of the buffer's bound or if the window is invalid. 406 */ 407static inline int native_window_set_crop( 408 struct ANativeWindow* window, 409 android_native_rect_t const * crop) 410{ 411 return window->perform(window, NATIVE_WINDOW_SET_CROP, crop); 412} 413 414/* 415 * native_window_set_buffer_count(..., count) 416 * Sets the number of buffers associated with this native window. 417 */ 418static inline int native_window_set_buffer_count( 419 struct ANativeWindow* window, 420 size_t bufferCount) 421{ 422 return window->perform(window, NATIVE_WINDOW_SET_BUFFER_COUNT, bufferCount); 423} 424 425/* 426 * native_window_set_buffers_geometry(..., int w, int h, int format) 427 * All buffers dequeued after this call will have the dimensions and format 428 * specified. A successful call to this function has the same effect as calling 429 * native_window_set_buffers_size and native_window_set_buffers_format. 430 * 431 * XXX: This function is deprecated. The native_window_set_buffers_dimensions 432 * and native_window_set_buffers_format functions should be used instead. 433 */ 434static inline int native_window_set_buffers_geometry( 435 struct ANativeWindow* window, 436 int w, int h, int format) 437{ 438 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_GEOMETRY, 439 w, h, format); 440} 441 442/* 443 * native_window_set_buffers_dimensions(..., int w, int h) 444 * All buffers dequeued after this call will have the dimensions specified. 445 * In particular, all buffers will have a fixed-size, independent form the 446 * native-window size. They will be appropriately scaled to the window-size 447 * upon window composition. 448 * 449 * If w and h are 0, the normal behavior is restored. That is, dequeued buffers 450 * following this call will be sized to match the window's size. 451 * 452 * Calling this function will reset the window crop to a NULL value, which 453 * disables cropping of the buffers. 454 */ 455static inline int native_window_set_buffers_dimensions( 456 struct ANativeWindow* window, 457 int w, int h) 458{ 459 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS, 460 w, h); 461} 462 463/* 464 * native_window_set_buffers_format(..., int format) 465 * All buffers dequeued after this call will have the format specified. 466 * 467 * If the specified format is 0, the default buffer format will be used. 468 */ 469static inline int native_window_set_buffers_format( 470 struct ANativeWindow* window, 471 int format) 472{ 473 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_FORMAT, format); 474} 475 476/* 477 * native_window_set_buffers_transform(..., int transform) 478 * All buffers queued after this call will be displayed transformed according 479 * to the transform parameter specified. 480 */ 481static inline int native_window_set_buffers_transform( 482 struct ANativeWindow* window, 483 int transform) 484{ 485 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_TRANSFORM, 486 transform); 487} 488 489/* 490 * native_window_set_buffers_timestamp(..., int64_t timestamp) 491 * All buffers queued after this call will be associated with the timestamp 492 * parameter specified. If the timestamp is set to NATIVE_WINDOW_TIMESTAMP_AUTO 493 * (the default), timestamps will be generated automatically when queueBuffer is 494 * called. The timestamp is measured in nanoseconds, and is normally monotonically 495 * increasing. The timestamp should be unaffected by time-of-day adjustments, 496 * and for a camera should be strictly monotonic but for a media player may be 497 * reset when the position is set. 498 */ 499static inline int native_window_set_buffers_timestamp( 500 struct ANativeWindow* window, 501 int64_t timestamp) 502{ 503 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP, 504 timestamp); 505} 506 507__END_DECLS 508 509#endif /* SYSTEM_CORE_INCLUDE_ANDROID_WINDOW_H */ 510