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 /*************************************************************************************************
18 *
19 * IMPORTANT:
20 *
21 * There is an old copy of this file in system/core/include/system/window.h, which exists only
22 * for backward source compatibility.
23 * But there are binaries out there as well, so this version of window.h must stay binary
24 * backward compatible with the one found in system/core.
25 *
26 *
27 * Source compatibility is also required for now, because this is how we're handling the
28 * transition from system/core/include (global include path) to nativewindow/include.
29 *
30 *************************************************************************************************/
31
32 #pragma once
33
34 #include <cutils/native_handle.h>
35 #include <errno.h>
36 #include <limits.h>
37 #include <stdbool.h>
38 #include <stdint.h>
39 #include <string.h>
40 #include <sys/cdefs.h>
41 #include <system/graphics.h>
42 #include <unistd.h>
43
44 // system/window.h is a superset of the vndk and apex apis
45 #include <apex/window.h>
46 #include <vndk/window.h>
47
48
49 #ifndef __UNUSED
50 #define __UNUSED __attribute__((__unused__))
51 #endif
52 #ifndef __deprecated
53 #define __deprecated __attribute__((__deprecated__))
54 #endif
55
56 __BEGIN_DECLS
57
58 /*****************************************************************************/
59
60 #define ANDROID_NATIVE_WINDOW_MAGIC ANDROID_NATIVE_MAKE_CONSTANT('_','w','n','d')
61
62 // ---------------------------------------------------------------------------
63
64 /* attributes queriable with query() */
65 enum {
66 NATIVE_WINDOW_WIDTH = 0,
67 NATIVE_WINDOW_HEIGHT = 1,
68 NATIVE_WINDOW_FORMAT = 2,
69
70 /* see ANativeWindowQuery in vndk/window.h */
71 NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS = ANATIVEWINDOW_QUERY_MIN_UNDEQUEUED_BUFFERS,
72
73 /* Check whether queueBuffer operations on the ANativeWindow send the buffer
74 * to the window compositor. The query sets the returned 'value' argument
75 * to 1 if the ANativeWindow DOES send queued buffers directly to the window
76 * compositor and 0 if the buffers do not go directly to the window
77 * compositor.
78 *
79 * This can be used to determine whether protected buffer content should be
80 * sent to the ANativeWindow. Note, however, that a result of 1 does NOT
81 * indicate that queued buffers will be protected from applications or users
82 * capturing their contents. If that behavior is desired then some other
83 * mechanism (e.g. the GRALLOC_USAGE_PROTECTED flag) should be used in
84 * conjunction with this query.
85 */
86 NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER = 4,
87
88 /* Get the concrete type of a ANativeWindow. See below for the list of
89 * possible return values.
90 *
91 * This query should not be used outside the Android framework and will
92 * likely be removed in the near future.
93 */
94 NATIVE_WINDOW_CONCRETE_TYPE = 5,
95
96 /*
97 * Default width and height of ANativeWindow buffers, these are the
98 * dimensions of the window buffers irrespective of the
99 * NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS call and match the native window
100 * size unless overridden by NATIVE_WINDOW_SET_BUFFERS_USER_DIMENSIONS.
101 */
102 NATIVE_WINDOW_DEFAULT_WIDTH = ANATIVEWINDOW_QUERY_DEFAULT_WIDTH,
103 NATIVE_WINDOW_DEFAULT_HEIGHT = ANATIVEWINDOW_QUERY_DEFAULT_HEIGHT,
104
105 /* see ANativeWindowQuery in vndk/window.h */
106 NATIVE_WINDOW_TRANSFORM_HINT = ANATIVEWINDOW_QUERY_TRANSFORM_HINT,
107
108 /*
109 * Boolean that indicates whether the consumer is running more than
110 * one buffer behind the producer.
111 */
112 NATIVE_WINDOW_CONSUMER_RUNNING_BEHIND = 9,
113
114 /*
115 * The consumer gralloc usage bits currently set by the consumer.
116 * The values are defined in hardware/libhardware/include/gralloc.h.
117 */
118 NATIVE_WINDOW_CONSUMER_USAGE_BITS = 10, /* deprecated */
119
120 /**
121 * Transformation that will by applied to buffers by the hwcomposer.
122 * This must not be set or checked by producer endpoints, and will
123 * disable the transform hint set in SurfaceFlinger (see
124 * NATIVE_WINDOW_TRANSFORM_HINT).
125 *
126 * INTENDED USE:
127 * Temporary - Please do not use this. This is intended only to be used
128 * by the camera's LEGACY mode.
129 *
130 * In situations where a SurfaceFlinger client wishes to set a transform
131 * that is not visible to the producer, and will always be applied in the
132 * hardware composer, the client can set this flag with
133 * native_window_set_buffers_sticky_transform. This can be used to rotate
134 * and flip buffers consumed by hardware composer without actually changing
135 * the aspect ratio of the buffers produced.
136 */
137 NATIVE_WINDOW_STICKY_TRANSFORM = 11,
138
139 /**
140 * The default data space for the buffers as set by the consumer.
141 * The values are defined in graphics.h.
142 */
143 NATIVE_WINDOW_DEFAULT_DATASPACE = 12,
144
145 /* see ANativeWindowQuery in vndk/window.h */
146 NATIVE_WINDOW_BUFFER_AGE = ANATIVEWINDOW_QUERY_BUFFER_AGE,
147
148 /*
149 * Returns the duration of the last dequeueBuffer call in microseconds
150 * Deprecated: please use NATIVE_WINDOW_GET_LAST_DEQUEUE_DURATION in
151 * perform() instead, which supports nanosecond precision.
152 */
153 NATIVE_WINDOW_LAST_DEQUEUE_DURATION = 14,
154
155 /*
156 * Returns the duration of the last queueBuffer call in microseconds
157 * Deprecated: please use NATIVE_WINDOW_GET_LAST_QUEUE_DURATION in
158 * perform() instead, which supports nanosecond precision.
159 */
160 NATIVE_WINDOW_LAST_QUEUE_DURATION = 15,
161
162 /*
163 * Returns the number of image layers that the ANativeWindow buffer
164 * contains. By default this is 1, unless a buffer is explicitly allocated
165 * to contain multiple layers.
166 */
167 NATIVE_WINDOW_LAYER_COUNT = 16,
168
169 /*
170 * Returns 1 if the native window is valid, 0 otherwise. native window is valid
171 * if it is safe (i.e. no crash will occur) to call any method on it.
172 */
173 NATIVE_WINDOW_IS_VALID = 17,
174
175 /*
176 * Returns 1 if NATIVE_WINDOW_GET_FRAME_TIMESTAMPS will return display
177 * present info, 0 if it won't.
178 */
179 NATIVE_WINDOW_FRAME_TIMESTAMPS_SUPPORTS_PRESENT = 18,
180
181 /*
182 * The consumer end is capable of handling protected buffers, i.e. buffer
183 * with GRALLOC_USAGE_PROTECTED usage bits on.
184 */
185 NATIVE_WINDOW_CONSUMER_IS_PROTECTED = 19,
186
187 /*
188 * Returns data space for the buffers.
189 */
190 NATIVE_WINDOW_DATASPACE = 20,
191
192 /*
193 * Returns maxBufferCount set by BufferQueueConsumer
194 */
195 NATIVE_WINDOW_MAX_BUFFER_COUNT = 21,
196 };
197
198 /* Valid operations for the (*perform)() hook.
199 *
200 * Values marked as 'deprecated' are supported, but have been superceded by
201 * other functionality.
202 *
203 * Values marked as 'private' should be considered private to the framework.
204 * HAL implementation code with access to an ANativeWindow should not use these,
205 * as it may not interact properly with the framework's use of the
206 * ANativeWindow.
207 */
208 enum {
209 // clang-format off
210 NATIVE_WINDOW_SET_USAGE = ANATIVEWINDOW_PERFORM_SET_USAGE, /* deprecated */
211 NATIVE_WINDOW_CONNECT = 1, /* deprecated */
212 NATIVE_WINDOW_DISCONNECT = 2, /* deprecated */
213 NATIVE_WINDOW_SET_CROP = 3, /* private */
214 NATIVE_WINDOW_SET_BUFFER_COUNT = 4,
215 NATIVE_WINDOW_SET_BUFFERS_GEOMETRY = ANATIVEWINDOW_PERFORM_SET_BUFFERS_GEOMETRY, /* deprecated */
216 NATIVE_WINDOW_SET_BUFFERS_TRANSFORM = 6,
217 NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP = 7,
218 NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS = 8,
219 NATIVE_WINDOW_SET_BUFFERS_FORMAT = ANATIVEWINDOW_PERFORM_SET_BUFFERS_FORMAT,
220 NATIVE_WINDOW_SET_SCALING_MODE = 10, /* private */
221 NATIVE_WINDOW_LOCK = 11, /* private */
222 NATIVE_WINDOW_UNLOCK_AND_POST = 12, /* private */
223 NATIVE_WINDOW_API_CONNECT = 13, /* private */
224 NATIVE_WINDOW_API_DISCONNECT = 14, /* private */
225 NATIVE_WINDOW_SET_BUFFERS_USER_DIMENSIONS = 15, /* private */
226 NATIVE_WINDOW_SET_POST_TRANSFORM_CROP = 16, /* deprecated, unimplemented */
227 NATIVE_WINDOW_SET_BUFFERS_STICKY_TRANSFORM = 17, /* private */
228 NATIVE_WINDOW_SET_SIDEBAND_STREAM = 18,
229 NATIVE_WINDOW_SET_BUFFERS_DATASPACE = 19,
230 NATIVE_WINDOW_SET_SURFACE_DAMAGE = 20, /* private */
231 NATIVE_WINDOW_SET_SHARED_BUFFER_MODE = 21,
232 NATIVE_WINDOW_SET_AUTO_REFRESH = 22,
233 NATIVE_WINDOW_GET_REFRESH_CYCLE_DURATION = 23,
234 NATIVE_WINDOW_GET_NEXT_FRAME_ID = 24,
235 NATIVE_WINDOW_ENABLE_FRAME_TIMESTAMPS = 25,
236 NATIVE_WINDOW_GET_COMPOSITOR_TIMING = 26,
237 NATIVE_WINDOW_GET_FRAME_TIMESTAMPS = 27,
238 NATIVE_WINDOW_GET_WIDE_COLOR_SUPPORT = 28,
239 NATIVE_WINDOW_GET_HDR_SUPPORT = 29,
240 NATIVE_WINDOW_SET_USAGE64 = ANATIVEWINDOW_PERFORM_SET_USAGE64,
241 NATIVE_WINDOW_GET_CONSUMER_USAGE64 = 31,
242 NATIVE_WINDOW_SET_BUFFERS_SMPTE2086_METADATA = 32,
243 NATIVE_WINDOW_SET_BUFFERS_CTA861_3_METADATA = 33,
244 NATIVE_WINDOW_SET_BUFFERS_HDR10_PLUS_METADATA = 34,
245 NATIVE_WINDOW_SET_AUTO_PREROTATION = 35,
246 NATIVE_WINDOW_GET_LAST_DEQUEUE_START = 36, /* private */
247 NATIVE_WINDOW_SET_DEQUEUE_TIMEOUT = 37, /* private */
248 NATIVE_WINDOW_GET_LAST_DEQUEUE_DURATION = 38, /* private */
249 NATIVE_WINDOW_GET_LAST_QUEUE_DURATION = 39, /* private */
250 NATIVE_WINDOW_SET_FRAME_RATE = 40,
251 NATIVE_WINDOW_SET_CANCEL_INTERCEPTOR = 41, /* private */
252 NATIVE_WINDOW_SET_DEQUEUE_INTERCEPTOR = 42, /* private */
253 NATIVE_WINDOW_SET_PERFORM_INTERCEPTOR = 43, /* private */
254 NATIVE_WINDOW_SET_QUEUE_INTERCEPTOR = 44, /* private */
255 NATIVE_WINDOW_ALLOCATE_BUFFERS = 45, /* private */
256 NATIVE_WINDOW_GET_LAST_QUEUED_BUFFER = 46, /* private */
257 NATIVE_WINDOW_SET_QUERY_INTERCEPTOR = 47, /* private */
258 // clang-format on
259 };
260
261 /* parameter for NATIVE_WINDOW_[API_][DIS]CONNECT */
262 enum {
263 /* Buffers will be queued by EGL via eglSwapBuffers after being filled using
264 * OpenGL ES.
265 */
266 NATIVE_WINDOW_API_EGL = 1,
267
268 /* Buffers will be queued after being filled using the CPU
269 */
270 NATIVE_WINDOW_API_CPU = 2,
271
272 /* Buffers will be queued by Stagefright after being filled by a video
273 * decoder. The video decoder can either be a software or hardware decoder.
274 */
275 NATIVE_WINDOW_API_MEDIA = 3,
276
277 /* Buffers will be queued by the the camera HAL.
278 */
279 NATIVE_WINDOW_API_CAMERA = 4,
280 };
281
282 /* parameter for NATIVE_WINDOW_SET_BUFFERS_TRANSFORM */
283 enum {
284 /* flip source image horizontally */
285 NATIVE_WINDOW_TRANSFORM_FLIP_H = HAL_TRANSFORM_FLIP_H ,
286 /* flip source image vertically */
287 NATIVE_WINDOW_TRANSFORM_FLIP_V = HAL_TRANSFORM_FLIP_V,
288 /* rotate source image 90 degrees clock-wise, and is applied after TRANSFORM_FLIP_{H|V} */
289 NATIVE_WINDOW_TRANSFORM_ROT_90 = HAL_TRANSFORM_ROT_90,
290 /* rotate source image 180 degrees */
291 NATIVE_WINDOW_TRANSFORM_ROT_180 = HAL_TRANSFORM_ROT_180,
292 /* rotate source image 270 degrees clock-wise */
293 NATIVE_WINDOW_TRANSFORM_ROT_270 = HAL_TRANSFORM_ROT_270,
294 /* transforms source by the inverse transform of the screen it is displayed onto. This
295 * transform is applied last */
296 NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY = 0x08
297 };
298
299 /* parameter for NATIVE_WINDOW_SET_SCALING_MODE
300 * keep in sync with Surface.java in frameworks/base */
301 enum {
302 /* the window content is not updated (frozen) until a buffer of
303 * the window size is received (enqueued)
304 */
305 NATIVE_WINDOW_SCALING_MODE_FREEZE = 0,
306 /* the buffer is scaled in both dimensions to match the window size */
307 NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW = 1,
308 /* the buffer is scaled uniformly such that the smaller dimension
309 * of the buffer matches the window size (cropping in the process)
310 */
311 NATIVE_WINDOW_SCALING_MODE_SCALE_CROP = 2,
312 /* the window is clipped to the size of the buffer's crop rectangle; pixels
313 * outside the crop rectangle are treated as if they are completely
314 * transparent.
315 */
316 NATIVE_WINDOW_SCALING_MODE_NO_SCALE_CROP = 3,
317 };
318
319 /* values returned by the NATIVE_WINDOW_CONCRETE_TYPE query */
320 enum {
321 NATIVE_WINDOW_FRAMEBUFFER = 0, /* FramebufferNativeWindow */
322 NATIVE_WINDOW_SURFACE = 1, /* Surface */
323 };
324
325 /* parameter for NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP
326 *
327 * Special timestamp value to indicate that timestamps should be auto-generated
328 * by the native window when queueBuffer is called. This is equal to INT64_MIN,
329 * defined directly to avoid problems with C99/C++ inclusion of stdint.h.
330 */
331 static const int64_t NATIVE_WINDOW_TIMESTAMP_AUTO = (-9223372036854775807LL-1);
332
333 /* parameter for NATIVE_WINDOW_GET_FRAME_TIMESTAMPS
334 *
335 * Special timestamp value to indicate the timestamps aren't yet known or
336 * that they are invalid.
337 */
338 static const int64_t NATIVE_WINDOW_TIMESTAMP_PENDING = -2;
339 static const int64_t NATIVE_WINDOW_TIMESTAMP_INVALID = -1;
340
341 struct ANativeWindow
342 {
343 #ifdef __cplusplus
ANativeWindowANativeWindow344 ANativeWindow()
345 : flags(0), minSwapInterval(0), maxSwapInterval(0), xdpi(0), ydpi(0)
346 {
347 common.magic = ANDROID_NATIVE_WINDOW_MAGIC;
348 common.version = sizeof(ANativeWindow);
349 memset(common.reserved, 0, sizeof(common.reserved));
350 }
351
352 /* Implement the methods that sp<ANativeWindow> expects so that it
353 can be used to automatically refcount ANativeWindow's. */
incStrongANativeWindow354 void incStrong(const void* /*id*/) const {
355 common.incRef(const_cast<android_native_base_t*>(&common));
356 }
decStrongANativeWindow357 void decStrong(const void* /*id*/) const {
358 common.decRef(const_cast<android_native_base_t*>(&common));
359 }
360 #endif
361
362 struct android_native_base_t common;
363
364 /* flags describing some attributes of this surface or its updater */
365 const uint32_t flags;
366
367 /* min swap interval supported by this updated */
368 const int minSwapInterval;
369
370 /* max swap interval supported by this updated */
371 const int maxSwapInterval;
372
373 /* horizontal and vertical resolution in DPI */
374 const float xdpi;
375 const float ydpi;
376
377 /* Some storage reserved for the OEM's driver. */
378 intptr_t oem[4];
379
380 /*
381 * Set the swap interval for this surface.
382 *
383 * Returns 0 on success or -errno on error.
384 */
385 int (*setSwapInterval)(struct ANativeWindow* window,
386 int interval);
387
388 /*
389 * Hook called by EGL to acquire a buffer. After this call, the buffer
390 * is not locked, so its content cannot be modified. This call may block if
391 * no buffers are available.
392 *
393 * The window holds a reference to the buffer between dequeueBuffer and
394 * either queueBuffer or cancelBuffer, so clients only need their own
395 * reference if they might use the buffer after queueing or canceling it.
396 * Holding a reference to a buffer after queueing or canceling it is only
397 * allowed if a specific buffer count has been set.
398 *
399 * Returns 0 on success or -errno on error.
400 *
401 * XXX: This function is deprecated. It will continue to work for some
402 * time for binary compatibility, but the new dequeueBuffer function that
403 * outputs a fence file descriptor should be used in its place.
404 */
405 int (*dequeueBuffer_DEPRECATED)(struct ANativeWindow* window,
406 struct ANativeWindowBuffer** buffer);
407
408 /*
409 * hook called by EGL to lock a buffer. This MUST be called before modifying
410 * the content of a buffer. The buffer must have been acquired with
411 * dequeueBuffer first.
412 *
413 * Returns 0 on success or -errno on error.
414 *
415 * XXX: This function is deprecated. It will continue to work for some
416 * time for binary compatibility, but it is essentially a no-op, and calls
417 * to it should be removed.
418 */
419 int (*lockBuffer_DEPRECATED)(struct ANativeWindow* window,
420 struct ANativeWindowBuffer* buffer);
421
422 /*
423 * Hook called by EGL when modifications to the render buffer are done.
424 * This unlocks and post the buffer.
425 *
426 * The window holds a reference to the buffer between dequeueBuffer and
427 * either queueBuffer or cancelBuffer, so clients only need their own
428 * reference if they might use the buffer after queueing or canceling it.
429 * Holding a reference to a buffer after queueing or canceling it is only
430 * allowed if a specific buffer count has been set.
431 *
432 * Buffers MUST be queued in the same order than they were dequeued.
433 *
434 * Returns 0 on success or -errno on error.
435 *
436 * XXX: This function is deprecated. It will continue to work for some
437 * time for binary compatibility, but the new queueBuffer function that
438 * takes a fence file descriptor should be used in its place (pass a value
439 * of -1 for the fence file descriptor if there is no valid one to pass).
440 */
441 int (*queueBuffer_DEPRECATED)(struct ANativeWindow* window,
442 struct ANativeWindowBuffer* buffer);
443
444 /*
445 * hook used to retrieve information about the native window.
446 *
447 * Returns 0 on success or -errno on error.
448 */
449 int (*query)(const struct ANativeWindow* window,
450 int what, int* value);
451
452 /*
453 * hook used to perform various operations on the surface.
454 * (*perform)() is a generic mechanism to add functionality to
455 * ANativeWindow while keeping backward binary compatibility.
456 *
457 * DO NOT CALL THIS HOOK DIRECTLY. Instead, use the helper functions
458 * defined below.
459 *
460 * (*perform)() returns -ENOENT if the 'what' parameter is not supported
461 * by the surface's implementation.
462 *
463 * See above for a list of valid operations, such as
464 * NATIVE_WINDOW_SET_USAGE or NATIVE_WINDOW_CONNECT
465 */
466 int (*perform)(struct ANativeWindow* window,
467 int operation, ... );
468
469 /*
470 * Hook used to cancel a buffer that has been dequeued.
471 * No synchronization is performed between dequeue() and cancel(), so
472 * either external synchronization is needed, or these functions must be
473 * called from the same thread.
474 *
475 * The window holds a reference to the buffer between dequeueBuffer and
476 * either queueBuffer or cancelBuffer, so clients only need their own
477 * reference if they might use the buffer after queueing or canceling it.
478 * Holding a reference to a buffer after queueing or canceling it is only
479 * allowed if a specific buffer count has been set.
480 *
481 * XXX: This function is deprecated. It will continue to work for some
482 * time for binary compatibility, but the new cancelBuffer function that
483 * takes a fence file descriptor should be used in its place (pass a value
484 * of -1 for the fence file descriptor if there is no valid one to pass).
485 */
486 int (*cancelBuffer_DEPRECATED)(struct ANativeWindow* window,
487 struct ANativeWindowBuffer* buffer);
488
489 /*
490 * Hook called by EGL to acquire a buffer. This call may block if no
491 * buffers are available.
492 *
493 * The window holds a reference to the buffer between dequeueBuffer and
494 * either queueBuffer or cancelBuffer, so clients only need their own
495 * reference if they might use the buffer after queueing or canceling it.
496 * Holding a reference to a buffer after queueing or canceling it is only
497 * allowed if a specific buffer count has been set.
498 *
499 * The libsync fence file descriptor returned in the int pointed to by the
500 * fenceFd argument will refer to the fence that must signal before the
501 * dequeued buffer may be written to. A value of -1 indicates that the
502 * caller may access the buffer immediately without waiting on a fence. If
503 * a valid file descriptor is returned (i.e. any value except -1) then the
504 * caller is responsible for closing the file descriptor.
505 *
506 * Returns 0 on success or -errno on error.
507 */
508 int (*dequeueBuffer)(struct ANativeWindow* window,
509 struct ANativeWindowBuffer** buffer, int* fenceFd);
510
511 /*
512 * Hook called by EGL when modifications to the render buffer are done.
513 * This unlocks and post the buffer.
514 *
515 * The window holds a reference to the buffer between dequeueBuffer and
516 * either queueBuffer or cancelBuffer, so clients only need their own
517 * reference if they might use the buffer after queueing or canceling it.
518 * Holding a reference to a buffer after queueing or canceling it is only
519 * allowed if a specific buffer count has been set.
520 *
521 * The fenceFd argument specifies a libsync fence file descriptor for a
522 * fence that must signal before the buffer can be accessed. If the buffer
523 * can be accessed immediately then a value of -1 should be used. The
524 * caller must not use the file descriptor after it is passed to
525 * queueBuffer, and the ANativeWindow implementation is responsible for
526 * closing it.
527 *
528 * Returns 0 on success or -errno on error.
529 */
530 int (*queueBuffer)(struct ANativeWindow* window,
531 struct ANativeWindowBuffer* buffer, int fenceFd);
532
533 /*
534 * Hook used to cancel a buffer that has been dequeued.
535 * No synchronization is performed between dequeue() and cancel(), so
536 * either external synchronization is needed, or these functions must be
537 * called from the same thread.
538 *
539 * The window holds a reference to the buffer between dequeueBuffer and
540 * either queueBuffer or cancelBuffer, so clients only need their own
541 * reference if they might use the buffer after queueing or canceling it.
542 * Holding a reference to a buffer after queueing or canceling it is only
543 * allowed if a specific buffer count has been set.
544 *
545 * The fenceFd argument specifies a libsync fence file decsriptor for a
546 * fence that must signal before the buffer can be accessed. If the buffer
547 * can be accessed immediately then a value of -1 should be used.
548 *
549 * Note that if the client has not waited on the fence that was returned
550 * from dequeueBuffer, that same fence should be passed to cancelBuffer to
551 * ensure that future uses of the buffer are preceded by a wait on that
552 * fence. The caller must not use the file descriptor after it is passed
553 * to cancelBuffer, and the ANativeWindow implementation is responsible for
554 * closing it.
555 *
556 * Returns 0 on success or -errno on error.
557 */
558 int (*cancelBuffer)(struct ANativeWindow* window,
559 struct ANativeWindowBuffer* buffer, int fenceFd);
560 };
561
562 /* Backwards compatibility: use ANativeWindow (struct ANativeWindow in C).
563 * android_native_window_t is deprecated.
564 */
565 typedef struct ANativeWindow android_native_window_t __deprecated;
566
567 /*
568 * native_window_set_usage64(..., usage)
569 * Sets the intended usage flags for the next buffers
570 * acquired with (*lockBuffer)() and on.
571 *
572 * Valid usage flags are defined in android/hardware_buffer.h
573 * All AHARDWAREBUFFER_USAGE_* flags can be specified as needed.
574 *
575 * Calling this function will usually cause following buffers to be
576 * reallocated.
577 */
native_window_set_usage(struct ANativeWindow * window,uint64_t usage)578 static inline int native_window_set_usage(struct ANativeWindow* window, uint64_t usage) {
579 return window->perform(window, NATIVE_WINDOW_SET_USAGE64, usage);
580 }
581
582 /* deprecated. Always returns 0. Don't call. */
583 static inline int native_window_connect(
584 struct ANativeWindow* window __UNUSED, int api __UNUSED) __deprecated;
585
native_window_connect(struct ANativeWindow * window __UNUSED,int api __UNUSED)586 static inline int native_window_connect(
587 struct ANativeWindow* window __UNUSED, int api __UNUSED) {
588 return 0;
589 }
590
591 /* deprecated. Always returns 0. Don't call. */
592 static inline int native_window_disconnect(
593 struct ANativeWindow* window __UNUSED, int api __UNUSED) __deprecated;
594
native_window_disconnect(struct ANativeWindow * window __UNUSED,int api __UNUSED)595 static inline int native_window_disconnect(
596 struct ANativeWindow* window __UNUSED, int api __UNUSED) {
597 return 0;
598 }
599
600 /*
601 * native_window_set_crop(..., crop)
602 * Sets which region of the next queued buffers needs to be considered.
603 * Depending on the scaling mode, a buffer's crop region is scaled and/or
604 * cropped to match the surface's size. This function sets the crop in
605 * pre-transformed buffer pixel coordinates.
606 *
607 * The specified crop region applies to all buffers queued after it is called.
608 *
609 * If 'crop' is NULL, subsequently queued buffers won't be cropped.
610 *
611 * An error is returned if for instance the crop region is invalid, out of the
612 * buffer's bound or if the window is invalid.
613 */
native_window_set_crop(struct ANativeWindow * window,android_native_rect_t const * crop)614 static inline int native_window_set_crop(
615 struct ANativeWindow* window,
616 android_native_rect_t const * crop)
617 {
618 return window->perform(window, NATIVE_WINDOW_SET_CROP, crop);
619 }
620
621 /*
622 * native_window_set_buffer_count(..., count)
623 * Sets the number of buffers associated with this native window.
624 */
native_window_set_buffer_count(struct ANativeWindow * window,size_t bufferCount)625 static inline int native_window_set_buffer_count(
626 struct ANativeWindow* window,
627 size_t bufferCount)
628 {
629 return window->perform(window, NATIVE_WINDOW_SET_BUFFER_COUNT, bufferCount);
630 }
631
632 /*
633 * native_window_set_buffers_geometry(..., int w, int h, int format)
634 * All buffers dequeued after this call will have the dimensions and format
635 * specified. A successful call to this function has the same effect as calling
636 * native_window_set_buffers_size and native_window_set_buffers_format.
637 *
638 * XXX: This function is deprecated. The native_window_set_buffers_dimensions
639 * and native_window_set_buffers_format functions should be used instead.
640 */
641 static inline int native_window_set_buffers_geometry(
642 struct ANativeWindow* window,
643 int w, int h, int format) __deprecated;
644
native_window_set_buffers_geometry(struct ANativeWindow * window,int w,int h,int format)645 static inline int native_window_set_buffers_geometry(
646 struct ANativeWindow* window,
647 int w, int h, int format)
648 {
649 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_GEOMETRY,
650 w, h, format);
651 }
652
653 /*
654 * native_window_set_buffers_dimensions(..., int w, int h)
655 * All buffers dequeued after this call will have the dimensions specified.
656 * In particular, all buffers will have a fixed-size, independent from the
657 * native-window size. They will be scaled according to the scaling mode
658 * (see native_window_set_scaling_mode) upon window composition.
659 *
660 * If w and h are 0, the normal behavior is restored. That is, dequeued buffers
661 * following this call will be sized to match the window's size.
662 *
663 * Calling this function will reset the window crop to a NULL value, which
664 * disables cropping of the buffers.
665 */
native_window_set_buffers_dimensions(struct ANativeWindow * window,int w,int h)666 static inline int native_window_set_buffers_dimensions(
667 struct ANativeWindow* window,
668 int w, int h)
669 {
670 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS,
671 w, h);
672 }
673
674 /*
675 * native_window_set_buffers_user_dimensions(..., int w, int h)
676 *
677 * Sets the user buffer size for the window, which overrides the
678 * window's size. All buffers dequeued after this call will have the
679 * dimensions specified unless overridden by
680 * native_window_set_buffers_dimensions. All buffers will have a
681 * fixed-size, independent from the native-window size. They will be
682 * scaled according to the scaling mode (see
683 * native_window_set_scaling_mode) upon window composition.
684 *
685 * If w and h are 0, the normal behavior is restored. That is, the
686 * default buffer size will match the windows's size.
687 *
688 * Calling this function will reset the window crop to a NULL value, which
689 * disables cropping of the buffers.
690 */
native_window_set_buffers_user_dimensions(struct ANativeWindow * window,int w,int h)691 static inline int native_window_set_buffers_user_dimensions(
692 struct ANativeWindow* window,
693 int w, int h)
694 {
695 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_USER_DIMENSIONS,
696 w, h);
697 }
698
699 /*
700 * native_window_set_buffers_format(..., int format)
701 * All buffers dequeued after this call will have the format specified.
702 *
703 * If the specified format is 0, the default buffer format will be used.
704 */
native_window_set_buffers_format(struct ANativeWindow * window,int format)705 static inline int native_window_set_buffers_format(
706 struct ANativeWindow* window,
707 int format)
708 {
709 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_FORMAT, format);
710 }
711
712 /*
713 * native_window_set_buffers_data_space(..., int dataSpace)
714 * All buffers queued after this call will be associated with the dataSpace
715 * parameter specified.
716 *
717 * dataSpace specifies additional information about the buffer that's dependent
718 * on the buffer format and the endpoints. For example, it can be used to convey
719 * the color space of the image data in the buffer, or it can be used to
720 * indicate that the buffers contain depth measurement data instead of color
721 * images. The default dataSpace is 0, HAL_DATASPACE_UNKNOWN, unless it has been
722 * overridden by the consumer.
723 */
native_window_set_buffers_data_space(struct ANativeWindow * window,android_dataspace_t dataSpace)724 static inline int native_window_set_buffers_data_space(
725 struct ANativeWindow* window,
726 android_dataspace_t dataSpace)
727 {
728 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_DATASPACE,
729 dataSpace);
730 }
731
732 /*
733 * native_window_set_buffers_smpte2086_metadata(..., metadata)
734 * All buffers queued after this call will be associated with the SMPTE
735 * ST.2086 metadata specified.
736 *
737 * metadata specifies additional information about the contents of the buffer
738 * that may affect how it's displayed. When it is nullptr, it means no such
739 * information is available. No SMPTE ST.2086 metadata is associated with the
740 * buffers by default.
741 */
native_window_set_buffers_smpte2086_metadata(struct ANativeWindow * window,const struct android_smpte2086_metadata * metadata)742 static inline int native_window_set_buffers_smpte2086_metadata(
743 struct ANativeWindow* window,
744 const struct android_smpte2086_metadata* metadata)
745 {
746 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_SMPTE2086_METADATA,
747 metadata);
748 }
749
750 /*
751 * native_window_set_buffers_cta861_3_metadata(..., metadata)
752 * All buffers queued after this call will be associated with the CTA-861.3
753 * metadata specified.
754 *
755 * metadata specifies additional information about the contents of the buffer
756 * that may affect how it's displayed. When it is nullptr, it means no such
757 * information is available. No CTA-861.3 metadata is associated with the
758 * buffers by default.
759 */
native_window_set_buffers_cta861_3_metadata(struct ANativeWindow * window,const struct android_cta861_3_metadata * metadata)760 static inline int native_window_set_buffers_cta861_3_metadata(
761 struct ANativeWindow* window,
762 const struct android_cta861_3_metadata* metadata)
763 {
764 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_CTA861_3_METADATA,
765 metadata);
766 }
767
768 /*
769 * native_window_set_buffers_hdr10_plus_metadata(..., metadata)
770 * All buffers queued after this call will be associated with the
771 * HDR10+ dynamic metadata specified.
772 *
773 * metadata specifies additional dynamic information about the
774 * contents of the buffer that may affect how it is displayed. When
775 * it is nullptr, it means no such information is available. No
776 * HDR10+ dynamic emtadata is associated with the buffers by default.
777 *
778 * Parameter "size" refers to the length of the metadata blob pointed to
779 * by parameter "data". The metadata blob will adhere to the HDR10+ SEI
780 * message standard.
781 */
native_window_set_buffers_hdr10_plus_metadata(struct ANativeWindow * window,const size_t size,const uint8_t * metadata)782 static inline int native_window_set_buffers_hdr10_plus_metadata(struct ANativeWindow* window,
783 const size_t size,
784 const uint8_t* metadata) {
785 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_HDR10_PLUS_METADATA, size,
786 metadata);
787 }
788
789 /*
790 * native_window_set_buffers_transform(..., int transform)
791 * All buffers queued after this call will be displayed transformed according
792 * to the transform parameter specified.
793 */
native_window_set_buffers_transform(struct ANativeWindow * window,int transform)794 static inline int native_window_set_buffers_transform(
795 struct ANativeWindow* window,
796 int transform)
797 {
798 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_TRANSFORM,
799 transform);
800 }
801
802 /*
803 * native_window_set_buffers_sticky_transform(..., int transform)
804 * All buffers queued after this call will be displayed transformed according
805 * to the transform parameter specified applied on top of the regular buffer
806 * transform. Setting this transform will disable the transform hint.
807 *
808 * Temporary - This is only intended to be used by the LEGACY camera mode, do
809 * not use this for anything else.
810 */
native_window_set_buffers_sticky_transform(struct ANativeWindow * window,int transform)811 static inline int native_window_set_buffers_sticky_transform(
812 struct ANativeWindow* window,
813 int transform)
814 {
815 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_STICKY_TRANSFORM,
816 transform);
817 }
818
819 /*
820 * native_window_set_buffers_timestamp(..., int64_t timestamp)
821 * All buffers queued after this call will be associated with the timestamp
822 * parameter specified. If the timestamp is set to NATIVE_WINDOW_TIMESTAMP_AUTO
823 * (the default), timestamps will be generated automatically when queueBuffer is
824 * called. The timestamp is measured in nanoseconds, and is normally monotonically
825 * increasing. The timestamp should be unaffected by time-of-day adjustments,
826 * and for a camera should be strictly monotonic but for a media player may be
827 * reset when the position is set.
828 */
native_window_set_buffers_timestamp(struct ANativeWindow * window,int64_t timestamp)829 static inline int native_window_set_buffers_timestamp(
830 struct ANativeWindow* window,
831 int64_t timestamp)
832 {
833 return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP,
834 timestamp);
835 }
836
837 /*
838 * native_window_set_scaling_mode(..., int mode)
839 * All buffers queued after this call will be associated with the scaling mode
840 * specified.
841 */
native_window_set_scaling_mode(struct ANativeWindow * window,int mode)842 static inline int native_window_set_scaling_mode(
843 struct ANativeWindow* window,
844 int mode)
845 {
846 return window->perform(window, NATIVE_WINDOW_SET_SCALING_MODE,
847 mode);
848 }
849
850 /*
851 * native_window_api_connect(..., int api)
852 * connects an API to this window. only one API can be connected at a time.
853 * Returns -EINVAL if for some reason the window cannot be connected, which
854 * can happen if it's connected to some other API.
855 */
native_window_api_connect(struct ANativeWindow * window,int api)856 static inline int native_window_api_connect(
857 struct ANativeWindow* window, int api)
858 {
859 return window->perform(window, NATIVE_WINDOW_API_CONNECT, api);
860 }
861
862 /*
863 * native_window_api_disconnect(..., int api)
864 * disconnect the API from this window.
865 * An error is returned if for instance the window wasn't connected in the
866 * first place.
867 */
native_window_api_disconnect(struct ANativeWindow * window,int api)868 static inline int native_window_api_disconnect(
869 struct ANativeWindow* window, int api)
870 {
871 return window->perform(window, NATIVE_WINDOW_API_DISCONNECT, api);
872 }
873
874 /*
875 * native_window_dequeue_buffer_and_wait(...)
876 * Dequeue a buffer and wait on the fence associated with that buffer. The
877 * buffer may safely be accessed immediately upon this function returning. An
878 * error is returned if either of the dequeue or the wait operations fail.
879 */
native_window_dequeue_buffer_and_wait(ANativeWindow * anw,struct ANativeWindowBuffer ** anb)880 static inline int native_window_dequeue_buffer_and_wait(ANativeWindow *anw,
881 struct ANativeWindowBuffer** anb) {
882 return anw->dequeueBuffer_DEPRECATED(anw, anb);
883 }
884
885 /*
886 * native_window_set_sideband_stream(..., native_handle_t*)
887 * Attach a sideband buffer stream to a native window.
888 */
native_window_set_sideband_stream(struct ANativeWindow * window,native_handle_t * sidebandHandle)889 static inline int native_window_set_sideband_stream(
890 struct ANativeWindow* window,
891 native_handle_t* sidebandHandle)
892 {
893 return window->perform(window, NATIVE_WINDOW_SET_SIDEBAND_STREAM,
894 sidebandHandle);
895 }
896
897 /*
898 * native_window_set_surface_damage(..., android_native_rect_t* rects, int numRects)
899 * Set the surface damage (i.e., the region of the surface that has changed
900 * since the previous frame). The damage set by this call will be reset (to the
901 * default of full-surface damage) after calling queue, so this must be called
902 * prior to every frame with damage that does not cover the whole surface if the
903 * caller desires downstream consumers to use this optimization.
904 *
905 * The damage region is specified as an array of rectangles, with the important
906 * caveat that the origin of the surface is considered to be the bottom-left
907 * corner, as in OpenGL ES.
908 *
909 * If numRects is set to 0, rects may be NULL, and the surface damage will be
910 * set to the full surface (the same as if this function had not been called for
911 * this frame).
912 */
native_window_set_surface_damage(struct ANativeWindow * window,const android_native_rect_t * rects,size_t numRects)913 static inline int native_window_set_surface_damage(
914 struct ANativeWindow* window,
915 const android_native_rect_t* rects, size_t numRects)
916 {
917 return window->perform(window, NATIVE_WINDOW_SET_SURFACE_DAMAGE,
918 rects, numRects);
919 }
920
921 /*
922 * native_window_set_shared_buffer_mode(..., bool sharedBufferMode)
923 * Enable/disable shared buffer mode
924 */
native_window_set_shared_buffer_mode(struct ANativeWindow * window,bool sharedBufferMode)925 static inline int native_window_set_shared_buffer_mode(
926 struct ANativeWindow* window,
927 bool sharedBufferMode)
928 {
929 return window->perform(window, NATIVE_WINDOW_SET_SHARED_BUFFER_MODE,
930 sharedBufferMode);
931 }
932
933 /*
934 * native_window_set_auto_refresh(..., autoRefresh)
935 * Enable/disable auto refresh when in shared buffer mode
936 */
native_window_set_auto_refresh(struct ANativeWindow * window,bool autoRefresh)937 static inline int native_window_set_auto_refresh(
938 struct ANativeWindow* window,
939 bool autoRefresh)
940 {
941 return window->perform(window, NATIVE_WINDOW_SET_AUTO_REFRESH, autoRefresh);
942 }
943
native_window_get_refresh_cycle_duration(struct ANativeWindow * window,int64_t * outRefreshDuration)944 static inline int native_window_get_refresh_cycle_duration(
945 struct ANativeWindow* window,
946 int64_t* outRefreshDuration)
947 {
948 return window->perform(window, NATIVE_WINDOW_GET_REFRESH_CYCLE_DURATION,
949 outRefreshDuration);
950 }
951
native_window_get_next_frame_id(struct ANativeWindow * window,uint64_t * frameId)952 static inline int native_window_get_next_frame_id(
953 struct ANativeWindow* window, uint64_t* frameId)
954 {
955 return window->perform(window, NATIVE_WINDOW_GET_NEXT_FRAME_ID, frameId);
956 }
957
native_window_enable_frame_timestamps(struct ANativeWindow * window,bool enable)958 static inline int native_window_enable_frame_timestamps(
959 struct ANativeWindow* window, bool enable)
960 {
961 return window->perform(window, NATIVE_WINDOW_ENABLE_FRAME_TIMESTAMPS,
962 enable);
963 }
964
native_window_get_compositor_timing(struct ANativeWindow * window,int64_t * compositeDeadline,int64_t * compositeInterval,int64_t * compositeToPresentLatency)965 static inline int native_window_get_compositor_timing(
966 struct ANativeWindow* window,
967 int64_t* compositeDeadline, int64_t* compositeInterval,
968 int64_t* compositeToPresentLatency)
969 {
970 return window->perform(window, NATIVE_WINDOW_GET_COMPOSITOR_TIMING,
971 compositeDeadline, compositeInterval, compositeToPresentLatency);
972 }
973
native_window_get_frame_timestamps(struct ANativeWindow * window,uint64_t frameId,int64_t * outRequestedPresentTime,int64_t * outAcquireTime,int64_t * outLatchTime,int64_t * outFirstRefreshStartTime,int64_t * outLastRefreshStartTime,int64_t * outGpuCompositionDoneTime,int64_t * outDisplayPresentTime,int64_t * outDequeueReadyTime,int64_t * outReleaseTime)974 static inline int native_window_get_frame_timestamps(
975 struct ANativeWindow* window, uint64_t frameId,
976 int64_t* outRequestedPresentTime, int64_t* outAcquireTime,
977 int64_t* outLatchTime, int64_t* outFirstRefreshStartTime,
978 int64_t* outLastRefreshStartTime, int64_t* outGpuCompositionDoneTime,
979 int64_t* outDisplayPresentTime, int64_t* outDequeueReadyTime,
980 int64_t* outReleaseTime)
981 {
982 return window->perform(window, NATIVE_WINDOW_GET_FRAME_TIMESTAMPS,
983 frameId, outRequestedPresentTime, outAcquireTime, outLatchTime,
984 outFirstRefreshStartTime, outLastRefreshStartTime,
985 outGpuCompositionDoneTime, outDisplayPresentTime,
986 outDequeueReadyTime, outReleaseTime);
987 }
988
native_window_get_wide_color_support(struct ANativeWindow * window,bool * outSupport)989 static inline int native_window_get_wide_color_support(
990 struct ANativeWindow* window, bool* outSupport) {
991 return window->perform(window, NATIVE_WINDOW_GET_WIDE_COLOR_SUPPORT,
992 outSupport);
993 }
994
native_window_get_hdr_support(struct ANativeWindow * window,bool * outSupport)995 static inline int native_window_get_hdr_support(struct ANativeWindow* window,
996 bool* outSupport) {
997 return window->perform(window, NATIVE_WINDOW_GET_HDR_SUPPORT, outSupport);
998 }
999
native_window_get_consumer_usage(struct ANativeWindow * window,uint64_t * outUsage)1000 static inline int native_window_get_consumer_usage(struct ANativeWindow* window,
1001 uint64_t* outUsage) {
1002 return window->perform(window, NATIVE_WINDOW_GET_CONSUMER_USAGE64, outUsage);
1003 }
1004
1005 /*
1006 * native_window_set_auto_prerotation(..., autoPrerotation)
1007 * Enable/disable the auto prerotation at buffer allocation when the buffer size
1008 * is driven by the consumer.
1009 *
1010 * When buffer size is driven by the consumer and the transform hint specifies
1011 * a 90 or 270 degree rotation, if auto prerotation is enabled, the width and
1012 * height used for dequeueBuffer will be additionally swapped.
1013 */
native_window_set_auto_prerotation(struct ANativeWindow * window,bool autoPrerotation)1014 static inline int native_window_set_auto_prerotation(struct ANativeWindow* window,
1015 bool autoPrerotation) {
1016 return window->perform(window, NATIVE_WINDOW_SET_AUTO_PREROTATION, autoPrerotation);
1017 }
1018
native_window_set_frame_rate(struct ANativeWindow * window,float frameRate,int8_t compatibility)1019 static inline int native_window_set_frame_rate(struct ANativeWindow* window, float frameRate,
1020 int8_t compatibility) {
1021 return window->perform(window, NATIVE_WINDOW_SET_FRAME_RATE, (double)frameRate,
1022 (int)compatibility);
1023 }
1024
1025 // ------------------------------------------------------------------------------------------------
1026 // Candidates for APEX visibility
1027 // These functions are planned to be made stable for APEX modules, but have not
1028 // yet been stabilized to a specific api version.
1029 // ------------------------------------------------------------------------------------------------
1030
1031 /**
1032 * Retrieves the last queued buffer for this window, along with the fence that
1033 * fires when the buffer is ready to be read, and the 4x4 coordinate
1034 * transform matrix that should be applied to the buffer's content. The
1035 * transform matrix is represented in column-major order.
1036 *
1037 * If there was no buffer previously queued, then outBuffer will be NULL and
1038 * the value of outFence will be -1.
1039 *
1040 * Note that if outBuffer is not NULL, then the caller will hold a reference
1041 * onto the buffer. Accordingly, the caller must call AHardwareBuffer_release
1042 * when the buffer is no longer needed so that the system may reclaim the
1043 * buffer.
1044 *
1045 * \return NO_ERROR on success.
1046 * \return NO_MEMORY if there was insufficient memory.
1047 */
ANativeWindow_getLastQueuedBuffer(ANativeWindow * window,AHardwareBuffer ** outBuffer,int * outFence,float outTransformMatrix[16])1048 static inline int ANativeWindow_getLastQueuedBuffer(ANativeWindow* window,
1049 AHardwareBuffer** outBuffer, int* outFence,
1050 float outTransformMatrix[16]) {
1051 return window->perform(window, NATIVE_WINDOW_GET_LAST_QUEUED_BUFFER, outBuffer, outFence,
1052 outTransformMatrix);
1053 }
1054
1055 /**
1056 * Retrieves an identifier for the next frame to be queued by this window.
1057 *
1058 * \return the next frame id.
1059 */
ANativeWindow_getNextFrameId(ANativeWindow * window)1060 static inline int64_t ANativeWindow_getNextFrameId(ANativeWindow* window) {
1061 int64_t value;
1062 window->perform(window, NATIVE_WINDOW_GET_NEXT_FRAME_ID, &value);
1063 return value;
1064 }
1065
1066 /**
1067 * Prototype of the function that an ANativeWindow implementation would call
1068 * when ANativeWindow_query is called.
1069 */
1070 typedef int (*ANativeWindow_queryFn)(const ANativeWindow* window, int what, int* value);
1071
1072 /**
1073 * Prototype of the function that intercepts an invocation of
1074 * ANativeWindow_queryFn, along with a data pointer that's passed by the
1075 * caller who set the interceptor, as well as arguments that would be
1076 * passed to ANativeWindow_queryFn if it were to be called.
1077 */
1078 typedef int (*ANativeWindow_queryInterceptor)(const ANativeWindow* window,
1079 ANativeWindow_queryFn perform, void* data,
1080 int what, int* value);
1081
1082 /**
1083 * Registers an interceptor for ANativeWindow_query. Instead of calling
1084 * the underlying query function, instead the provided interceptor is
1085 * called, which may optionally call the underlying query function. An
1086 * optional data pointer is also provided to side-channel additional arguments.
1087 *
1088 * Note that usage of this should only be used for specialized use-cases by
1089 * either the system partition or to Mainline modules. This should never be
1090 * exposed to NDK or LL-NDK.
1091 *
1092 * Returns NO_ERROR on success, -errno if registration failed.
1093 */
ANativeWindow_setQueryInterceptor(ANativeWindow * window,ANativeWindow_queryInterceptor interceptor,void * data)1094 static inline int ANativeWindow_setQueryInterceptor(ANativeWindow* window,
1095 ANativeWindow_queryInterceptor interceptor,
1096 void* data) {
1097 return window->perform(window, NATIVE_WINDOW_SET_QUERY_INTERCEPTOR, interceptor, data);
1098 }
1099
1100 __END_DECLS
1101