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     NATIVE_WINDOW_GET_LAST_QUEUED_BUFFER2         = 50,    /* private */
259     // clang-format on
260 };
261 
262 /* parameter for NATIVE_WINDOW_[API_][DIS]CONNECT */
263 enum {
264     /* Buffers will be queued by EGL via eglSwapBuffers after being filled using
265      * OpenGL ES.
266      */
267     NATIVE_WINDOW_API_EGL = 1,
268 
269     /* Buffers will be queued after being filled using the CPU
270      */
271     NATIVE_WINDOW_API_CPU = 2,
272 
273     /* Buffers will be queued by Stagefright after being filled by a video
274      * decoder.  The video decoder can either be a software or hardware decoder.
275      */
276     NATIVE_WINDOW_API_MEDIA = 3,
277 
278     /* Buffers will be queued by the the camera HAL.
279      */
280     NATIVE_WINDOW_API_CAMERA = 4,
281 };
282 
283 /* parameter for NATIVE_WINDOW_SET_BUFFERS_TRANSFORM */
284 enum {
285     /* flip source image horizontally */
286     NATIVE_WINDOW_TRANSFORM_FLIP_H = HAL_TRANSFORM_FLIP_H ,
287     /* flip source image vertically */
288     NATIVE_WINDOW_TRANSFORM_FLIP_V = HAL_TRANSFORM_FLIP_V,
289     /* rotate source image 90 degrees clock-wise, and is applied after TRANSFORM_FLIP_{H|V} */
290     NATIVE_WINDOW_TRANSFORM_ROT_90 = HAL_TRANSFORM_ROT_90,
291     /* rotate source image 180 degrees */
292     NATIVE_WINDOW_TRANSFORM_ROT_180 = HAL_TRANSFORM_ROT_180,
293     /* rotate source image 270 degrees clock-wise */
294     NATIVE_WINDOW_TRANSFORM_ROT_270 = HAL_TRANSFORM_ROT_270,
295     /* transforms source by the inverse transform of the screen it is displayed onto. This
296      * transform is applied last */
297     NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY = 0x08
298 };
299 
300 /* parameter for NATIVE_WINDOW_SET_SCALING_MODE
301  * keep in sync with Surface.java in frameworks/base */
302 enum {
303     /* the window content is not updated (frozen) until a buffer of
304      * the window size is received (enqueued)
305      */
306     NATIVE_WINDOW_SCALING_MODE_FREEZE           = 0,
307     /* the buffer is scaled in both dimensions to match the window size */
308     NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW  = 1,
309     /* the buffer is scaled uniformly such that the smaller dimension
310      * of the buffer matches the window size (cropping in the process)
311      */
312     NATIVE_WINDOW_SCALING_MODE_SCALE_CROP       = 2,
313     /* the window is clipped to the size of the buffer's crop rectangle; pixels
314      * outside the crop rectangle are treated as if they are completely
315      * transparent.
316      */
317     NATIVE_WINDOW_SCALING_MODE_NO_SCALE_CROP    = 3,
318 };
319 
320 /* values returned by the NATIVE_WINDOW_CONCRETE_TYPE query */
321 enum {
322     NATIVE_WINDOW_FRAMEBUFFER               = 0, /* FramebufferNativeWindow */
323     NATIVE_WINDOW_SURFACE                   = 1, /* Surface */
324 };
325 
326 /* parameter for NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP
327  *
328  * Special timestamp value to indicate that timestamps should be auto-generated
329  * by the native window when queueBuffer is called.  This is equal to INT64_MIN,
330  * defined directly to avoid problems with C99/C++ inclusion of stdint.h.
331  */
332 static const int64_t NATIVE_WINDOW_TIMESTAMP_AUTO = (-9223372036854775807LL-1);
333 
334 /* parameter for NATIVE_WINDOW_GET_FRAME_TIMESTAMPS
335  *
336  * Special timestamp value to indicate the timestamps aren't yet known or
337  * that they are invalid.
338  */
339 static const int64_t NATIVE_WINDOW_TIMESTAMP_PENDING = -2;
340 static const int64_t NATIVE_WINDOW_TIMESTAMP_INVALID = -1;
341 
342 struct ANativeWindow
343 {
344 #ifdef __cplusplus
ANativeWindowANativeWindow345     ANativeWindow()
346         : flags(0), minSwapInterval(0), maxSwapInterval(0), xdpi(0), ydpi(0)
347     {
348         common.magic = ANDROID_NATIVE_WINDOW_MAGIC;
349         common.version = sizeof(ANativeWindow);
350         memset(common.reserved, 0, sizeof(common.reserved));
351     }
352 
353     /* Implement the methods that sp<ANativeWindow> expects so that it
354        can be used to automatically refcount ANativeWindow's. */
incStrongANativeWindow355     void incStrong(const void* /*id*/) const {
356         common.incRef(const_cast<android_native_base_t*>(&common));
357     }
decStrongANativeWindow358     void decStrong(const void* /*id*/) const {
359         common.decRef(const_cast<android_native_base_t*>(&common));
360     }
361 #endif
362 
363     struct android_native_base_t common;
364 
365     /* flags describing some attributes of this surface or its updater */
366     const uint32_t flags;
367 
368     /* min swap interval supported by this updated */
369     const int   minSwapInterval;
370 
371     /* max swap interval supported by this updated */
372     const int   maxSwapInterval;
373 
374     /* horizontal and vertical resolution in DPI */
375     const float xdpi;
376     const float ydpi;
377 
378     /* Some storage reserved for the OEM's driver. */
379     intptr_t    oem[4];
380 
381     /*
382      * Set the swap interval for this surface.
383      *
384      * Returns 0 on success or -errno on error.
385      */
386     int     (*setSwapInterval)(struct ANativeWindow* window,
387                 int interval);
388 
389     /*
390      * Hook called by EGL to acquire a buffer. After this call, the buffer
391      * is not locked, so its content cannot be modified. This call may block if
392      * no buffers are available.
393      *
394      * The window holds a reference to the buffer between dequeueBuffer and
395      * either queueBuffer or cancelBuffer, so clients only need their own
396      * reference if they might use the buffer after queueing or canceling it.
397      * Holding a reference to a buffer after queueing or canceling it is only
398      * allowed if a specific buffer count has been set.
399      *
400      * Returns 0 on success or -errno on error.
401      *
402      * XXX: This function is deprecated.  It will continue to work for some
403      * time for binary compatibility, but the new dequeueBuffer function that
404      * outputs a fence file descriptor should be used in its place.
405      */
406     int     (*dequeueBuffer_DEPRECATED)(struct ANativeWindow* window,
407                 struct ANativeWindowBuffer** buffer);
408 
409     /*
410      * hook called by EGL to lock a buffer. This MUST be called before modifying
411      * the content of a buffer. The buffer must have been acquired with
412      * dequeueBuffer first.
413      *
414      * Returns 0 on success or -errno on error.
415      *
416      * XXX: This function is deprecated.  It will continue to work for some
417      * time for binary compatibility, but it is essentially a no-op, and calls
418      * to it should be removed.
419      */
420     int     (*lockBuffer_DEPRECATED)(struct ANativeWindow* window,
421                 struct ANativeWindowBuffer* buffer);
422 
423     /*
424      * Hook called by EGL when modifications to the render buffer are done.
425      * This unlocks and post the buffer.
426      *
427      * The window holds a reference to the buffer between dequeueBuffer and
428      * either queueBuffer or cancelBuffer, so clients only need their own
429      * reference if they might use the buffer after queueing or canceling it.
430      * Holding a reference to a buffer after queueing or canceling it is only
431      * allowed if a specific buffer count has been set.
432      *
433      * Buffers MUST be queued in the same order than they were dequeued.
434      *
435      * Returns 0 on success or -errno on error.
436      *
437      * XXX: This function is deprecated.  It will continue to work for some
438      * time for binary compatibility, but the new queueBuffer function that
439      * takes a fence file descriptor should be used in its place (pass a value
440      * of -1 for the fence file descriptor if there is no valid one to pass).
441      */
442     int     (*queueBuffer_DEPRECATED)(struct ANativeWindow* window,
443                 struct ANativeWindowBuffer* buffer);
444 
445     /*
446      * hook used to retrieve information about the native window.
447      *
448      * Returns 0 on success or -errno on error.
449      */
450     int     (*query)(const struct ANativeWindow* window,
451                 int what, int* value);
452 
453     /*
454      * hook used to perform various operations on the surface.
455      * (*perform)() is a generic mechanism to add functionality to
456      * ANativeWindow while keeping backward binary compatibility.
457      *
458      * DO NOT CALL THIS HOOK DIRECTLY.  Instead, use the helper functions
459      * defined below.
460      *
461      * (*perform)() returns -ENOENT if the 'what' parameter is not supported
462      * by the surface's implementation.
463      *
464      * See above for a list of valid operations, such as
465      * NATIVE_WINDOW_SET_USAGE or NATIVE_WINDOW_CONNECT
466      */
467     int     (*perform)(struct ANativeWindow* window,
468                 int operation, ... );
469 
470     /*
471      * Hook used to cancel a buffer that has been dequeued.
472      * No synchronization is performed between dequeue() and cancel(), so
473      * either external synchronization is needed, or these functions must be
474      * called from the same thread.
475      *
476      * The window holds a reference to the buffer between dequeueBuffer and
477      * either queueBuffer or cancelBuffer, so clients only need their own
478      * reference if they might use the buffer after queueing or canceling it.
479      * Holding a reference to a buffer after queueing or canceling it is only
480      * allowed if a specific buffer count has been set.
481      *
482      * XXX: This function is deprecated.  It will continue to work for some
483      * time for binary compatibility, but the new cancelBuffer function that
484      * takes a fence file descriptor should be used in its place (pass a value
485      * of -1 for the fence file descriptor if there is no valid one to pass).
486      */
487     int     (*cancelBuffer_DEPRECATED)(struct ANativeWindow* window,
488                 struct ANativeWindowBuffer* buffer);
489 
490     /*
491      * Hook called by EGL to acquire a buffer. This call may block if no
492      * buffers are available.
493      *
494      * The window holds a reference to the buffer between dequeueBuffer and
495      * either queueBuffer or cancelBuffer, so clients only need their own
496      * reference if they might use the buffer after queueing or canceling it.
497      * Holding a reference to a buffer after queueing or canceling it is only
498      * allowed if a specific buffer count has been set.
499      *
500      * The libsync fence file descriptor returned in the int pointed to by the
501      * fenceFd argument will refer to the fence that must signal before the
502      * dequeued buffer may be written to.  A value of -1 indicates that the
503      * caller may access the buffer immediately without waiting on a fence.  If
504      * a valid file descriptor is returned (i.e. any value except -1) then the
505      * caller is responsible for closing the file descriptor.
506      *
507      * Returns 0 on success or -errno on error.
508      */
509     int     (*dequeueBuffer)(struct ANativeWindow* window,
510                 struct ANativeWindowBuffer** buffer, int* fenceFd);
511 
512     /*
513      * Hook called by EGL when modifications to the render buffer are done.
514      * This unlocks and post the buffer.
515      *
516      * The window holds a reference to the buffer between dequeueBuffer and
517      * either queueBuffer or cancelBuffer, so clients only need their own
518      * reference if they might use the buffer after queueing or canceling it.
519      * Holding a reference to a buffer after queueing or canceling it is only
520      * allowed if a specific buffer count has been set.
521      *
522      * The fenceFd argument specifies a libsync fence file descriptor for a
523      * fence that must signal before the buffer can be accessed.  If the buffer
524      * can be accessed immediately then a value of -1 should be used.  The
525      * caller must not use the file descriptor after it is passed to
526      * queueBuffer, and the ANativeWindow implementation is responsible for
527      * closing it.
528      *
529      * Returns 0 on success or -errno on error.
530      */
531     int     (*queueBuffer)(struct ANativeWindow* window,
532                 struct ANativeWindowBuffer* buffer, int fenceFd);
533 
534     /*
535      * Hook used to cancel a buffer that has been dequeued.
536      * No synchronization is performed between dequeue() and cancel(), so
537      * either external synchronization is needed, or these functions must be
538      * called from the same thread.
539      *
540      * The window holds a reference to the buffer between dequeueBuffer and
541      * either queueBuffer or cancelBuffer, so clients only need their own
542      * reference if they might use the buffer after queueing or canceling it.
543      * Holding a reference to a buffer after queueing or canceling it is only
544      * allowed if a specific buffer count has been set.
545      *
546      * The fenceFd argument specifies a libsync fence file decsriptor for a
547      * fence that must signal before the buffer can be accessed.  If the buffer
548      * can be accessed immediately then a value of -1 should be used.
549      *
550      * Note that if the client has not waited on the fence that was returned
551      * from dequeueBuffer, that same fence should be passed to cancelBuffer to
552      * ensure that future uses of the buffer are preceded by a wait on that
553      * fence.  The caller must not use the file descriptor after it is passed
554      * to cancelBuffer, and the ANativeWindow implementation is responsible for
555      * closing it.
556      *
557      * Returns 0 on success or -errno on error.
558      */
559     int     (*cancelBuffer)(struct ANativeWindow* window,
560                 struct ANativeWindowBuffer* buffer, int fenceFd);
561 };
562 
563  /* Backwards compatibility: use ANativeWindow (struct ANativeWindow in C).
564   * android_native_window_t is deprecated.
565   */
566 typedef struct ANativeWindow android_native_window_t __deprecated;
567 
568 /*
569  *  native_window_set_usage64(..., usage)
570  *  Sets the intended usage flags for the next buffers
571  *  acquired with (*lockBuffer)() and on.
572  *
573  *  Valid usage flags are defined in android/hardware_buffer.h
574  *  All AHARDWAREBUFFER_USAGE_* flags can be specified as needed.
575  *
576  *  Calling this function will usually cause following buffers to be
577  *  reallocated.
578  */
native_window_set_usage(struct ANativeWindow * window,uint64_t usage)579 static inline int native_window_set_usage(struct ANativeWindow* window, uint64_t usage) {
580     return window->perform(window, NATIVE_WINDOW_SET_USAGE64, usage);
581 }
582 
583 /* deprecated. Always returns 0. Don't call. */
584 static inline int native_window_connect(
585         struct ANativeWindow* window __UNUSED, int api __UNUSED) __deprecated;
586 
native_window_connect(struct ANativeWindow * window __UNUSED,int api __UNUSED)587 static inline int native_window_connect(
588         struct ANativeWindow* window __UNUSED, int api __UNUSED) {
589     return 0;
590 }
591 
592 /* deprecated. Always returns 0. Don't call. */
593 static inline int native_window_disconnect(
594         struct ANativeWindow* window __UNUSED, int api __UNUSED) __deprecated;
595 
native_window_disconnect(struct ANativeWindow * window __UNUSED,int api __UNUSED)596 static inline int native_window_disconnect(
597         struct ANativeWindow* window __UNUSED, int api __UNUSED) {
598     return 0;
599 }
600 
601 /*
602  * native_window_set_crop(..., crop)
603  * Sets which region of the next queued buffers needs to be considered.
604  * Depending on the scaling mode, a buffer's crop region is scaled and/or
605  * cropped to match the surface's size.  This function sets the crop in
606  * pre-transformed buffer pixel coordinates.
607  *
608  * The specified crop region applies to all buffers queued after it is called.
609  *
610  * If 'crop' is NULL, subsequently queued buffers won't be cropped.
611  *
612  * An error is returned if for instance the crop region is invalid, out of the
613  * buffer's bound or if the window is invalid.
614  */
native_window_set_crop(struct ANativeWindow * window,android_native_rect_t const * crop)615 static inline int native_window_set_crop(
616         struct ANativeWindow* window,
617         android_native_rect_t const * crop)
618 {
619     return window->perform(window, NATIVE_WINDOW_SET_CROP, crop);
620 }
621 
622 /*
623  * native_window_set_buffer_count(..., count)
624  * Sets the number of buffers associated with this native window.
625  */
native_window_set_buffer_count(struct ANativeWindow * window,size_t bufferCount)626 static inline int native_window_set_buffer_count(
627         struct ANativeWindow* window,
628         size_t bufferCount)
629 {
630     return window->perform(window, NATIVE_WINDOW_SET_BUFFER_COUNT, bufferCount);
631 }
632 
633 /*
634  * native_window_set_buffers_geometry(..., int w, int h, int format)
635  * All buffers dequeued after this call will have the dimensions and format
636  * specified.  A successful call to this function has the same effect as calling
637  * native_window_set_buffers_size and native_window_set_buffers_format.
638  *
639  * XXX: This function is deprecated.  The native_window_set_buffers_dimensions
640  * and native_window_set_buffers_format functions should be used instead.
641  */
642 static inline int native_window_set_buffers_geometry(
643         struct ANativeWindow* window,
644         int w, int h, int format) __deprecated;
645 
native_window_set_buffers_geometry(struct ANativeWindow * window,int w,int h,int format)646 static inline int native_window_set_buffers_geometry(
647         struct ANativeWindow* window,
648         int w, int h, int format)
649 {
650     return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_GEOMETRY,
651             w, h, format);
652 }
653 
654 /*
655  * native_window_set_buffers_dimensions(..., int w, int h)
656  * All buffers dequeued after this call will have the dimensions specified.
657  * In particular, all buffers will have a fixed-size, independent from the
658  * native-window size. They will be scaled according to the scaling mode
659  * (see native_window_set_scaling_mode) upon window composition.
660  *
661  * If w and h are 0, the normal behavior is restored. That is, dequeued buffers
662  * following this call will be sized to match the window's size.
663  *
664  * Calling this function will reset the window crop to a NULL value, which
665  * disables cropping of the buffers.
666  */
native_window_set_buffers_dimensions(struct ANativeWindow * window,int w,int h)667 static inline int native_window_set_buffers_dimensions(
668         struct ANativeWindow* window,
669         int w, int h)
670 {
671     return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS,
672             w, h);
673 }
674 
675 /*
676  * native_window_set_buffers_user_dimensions(..., int w, int h)
677  *
678  * Sets the user buffer size for the window, which overrides the
679  * window's size.  All buffers dequeued after this call will have the
680  * dimensions specified unless overridden by
681  * native_window_set_buffers_dimensions.  All buffers will have a
682  * fixed-size, independent from the native-window size. They will be
683  * scaled according to the scaling mode (see
684  * native_window_set_scaling_mode) upon window composition.
685  *
686  * If w and h are 0, the normal behavior is restored. That is, the
687  * default buffer size will match the windows's size.
688  *
689  * Calling this function will reset the window crop to a NULL value, which
690  * disables cropping of the buffers.
691  */
native_window_set_buffers_user_dimensions(struct ANativeWindow * window,int w,int h)692 static inline int native_window_set_buffers_user_dimensions(
693         struct ANativeWindow* window,
694         int w, int h)
695 {
696     return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_USER_DIMENSIONS,
697             w, h);
698 }
699 
700 /*
701  * native_window_set_buffers_format(..., int format)
702  * All buffers dequeued after this call will have the format specified.
703  *
704  * If the specified format is 0, the default buffer format will be used.
705  */
native_window_set_buffers_format(struct ANativeWindow * window,int format)706 static inline int native_window_set_buffers_format(
707         struct ANativeWindow* window,
708         int format)
709 {
710     return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_FORMAT, format);
711 }
712 
713 /*
714  * native_window_set_buffers_data_space(..., int dataSpace)
715  * All buffers queued after this call will be associated with the dataSpace
716  * parameter specified.
717  *
718  * dataSpace specifies additional information about the buffer that's dependent
719  * on the buffer format and the endpoints. For example, it can be used to convey
720  * the color space of the image data in the buffer, or it can be used to
721  * indicate that the buffers contain depth measurement data instead of color
722  * images.  The default dataSpace is 0, HAL_DATASPACE_UNKNOWN, unless it has been
723  * overridden by the consumer.
724  */
native_window_set_buffers_data_space(struct ANativeWindow * window,android_dataspace_t dataSpace)725 static inline int native_window_set_buffers_data_space(
726         struct ANativeWindow* window,
727         android_dataspace_t dataSpace)
728 {
729     return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_DATASPACE,
730             dataSpace);
731 }
732 
733 /*
734  * native_window_set_buffers_smpte2086_metadata(..., metadata)
735  * All buffers queued after this call will be associated with the SMPTE
736  * ST.2086 metadata specified.
737  *
738  * metadata specifies additional information about the contents of the buffer
739  * that may affect how it's displayed.  When it is nullptr, it means no such
740  * information is available.  No SMPTE ST.2086 metadata is associated with the
741  * buffers by default.
742  */
native_window_set_buffers_smpte2086_metadata(struct ANativeWindow * window,const struct android_smpte2086_metadata * metadata)743 static inline int native_window_set_buffers_smpte2086_metadata(
744         struct ANativeWindow* window,
745         const struct android_smpte2086_metadata* metadata)
746 {
747     return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_SMPTE2086_METADATA,
748             metadata);
749 }
750 
751 /*
752  * native_window_set_buffers_cta861_3_metadata(..., metadata)
753  * All buffers queued after this call will be associated with the CTA-861.3
754  * metadata specified.
755  *
756  * metadata specifies additional information about the contents of the buffer
757  * that may affect how it's displayed.  When it is nullptr, it means no such
758  * information is available.  No CTA-861.3 metadata is associated with the
759  * buffers by default.
760  */
native_window_set_buffers_cta861_3_metadata(struct ANativeWindow * window,const struct android_cta861_3_metadata * metadata)761 static inline int native_window_set_buffers_cta861_3_metadata(
762         struct ANativeWindow* window,
763         const struct android_cta861_3_metadata* metadata)
764 {
765     return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_CTA861_3_METADATA,
766             metadata);
767 }
768 
769 /*
770  * native_window_set_buffers_hdr10_plus_metadata(..., metadata)
771  * All buffers queued after this call will be associated with the
772  * HDR10+ dynamic metadata specified.
773  *
774  * metadata specifies additional dynamic information about the
775  * contents of the buffer that may affect how it is displayed.  When
776  * it is nullptr, it means no such information is available.  No
777  * HDR10+ dynamic emtadata is associated with the buffers by default.
778  *
779  * Parameter "size" refers to the length of the metadata blob pointed to
780  * by parameter "data".  The metadata blob will adhere to the HDR10+ SEI
781  * message standard.
782  */
native_window_set_buffers_hdr10_plus_metadata(struct ANativeWindow * window,const size_t size,const uint8_t * metadata)783 static inline int native_window_set_buffers_hdr10_plus_metadata(struct ANativeWindow* window,
784                                                            const size_t size,
785                                                            const uint8_t* metadata) {
786     return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_HDR10_PLUS_METADATA, size,
787                            metadata);
788 }
789 
790 /*
791  * native_window_set_buffers_transform(..., int transform)
792  * All buffers queued after this call will be displayed transformed according
793  * to the transform parameter specified.
794  */
native_window_set_buffers_transform(struct ANativeWindow * window,int transform)795 static inline int native_window_set_buffers_transform(
796         struct ANativeWindow* window,
797         int transform)
798 {
799     return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_TRANSFORM,
800             transform);
801 }
802 
803 /*
804  * native_window_set_buffers_sticky_transform(..., int transform)
805  * All buffers queued after this call will be displayed transformed according
806  * to the transform parameter specified applied on top of the regular buffer
807  * transform.  Setting this transform will disable the transform hint.
808  *
809  * Temporary - This is only intended to be used by the LEGACY camera mode, do
810  *   not use this for anything else.
811  */
native_window_set_buffers_sticky_transform(struct ANativeWindow * window,int transform)812 static inline int native_window_set_buffers_sticky_transform(
813         struct ANativeWindow* window,
814         int transform)
815 {
816     return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_STICKY_TRANSFORM,
817             transform);
818 }
819 
820 /*
821  * native_window_set_buffers_timestamp(..., int64_t timestamp)
822  * All buffers queued after this call will be associated with the timestamp
823  * parameter specified. If the timestamp is set to NATIVE_WINDOW_TIMESTAMP_AUTO
824  * (the default), timestamps will be generated automatically when queueBuffer is
825  * called. The timestamp is measured in nanoseconds, and is normally monotonically
826  * increasing. The timestamp should be unaffected by time-of-day adjustments,
827  * and for a camera should be strictly monotonic but for a media player may be
828  * reset when the position is set.
829  */
native_window_set_buffers_timestamp(struct ANativeWindow * window,int64_t timestamp)830 static inline int native_window_set_buffers_timestamp(
831         struct ANativeWindow* window,
832         int64_t timestamp)
833 {
834     return window->perform(window, NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP,
835             timestamp);
836 }
837 
838 /*
839  * native_window_set_scaling_mode(..., int mode)
840  * All buffers queued after this call will be associated with the scaling mode
841  * specified.
842  */
native_window_set_scaling_mode(struct ANativeWindow * window,int mode)843 static inline int native_window_set_scaling_mode(
844         struct ANativeWindow* window,
845         int mode)
846 {
847     return window->perform(window, NATIVE_WINDOW_SET_SCALING_MODE,
848             mode);
849 }
850 
851 /*
852  * native_window_api_connect(..., int api)
853  * connects an API to this window. only one API can be connected at a time.
854  * Returns -EINVAL if for some reason the window cannot be connected, which
855  * can happen if it's connected to some other API.
856  */
native_window_api_connect(struct ANativeWindow * window,int api)857 static inline int native_window_api_connect(
858         struct ANativeWindow* window, int api)
859 {
860     return window->perform(window, NATIVE_WINDOW_API_CONNECT, api);
861 }
862 
863 /*
864  * native_window_api_disconnect(..., int api)
865  * disconnect the API from this window.
866  * An error is returned if for instance the window wasn't connected in the
867  * first place.
868  */
native_window_api_disconnect(struct ANativeWindow * window,int api)869 static inline int native_window_api_disconnect(
870         struct ANativeWindow* window, int api)
871 {
872     return window->perform(window, NATIVE_WINDOW_API_DISCONNECT, api);
873 }
874 
875 /*
876  * native_window_dequeue_buffer_and_wait(...)
877  * Dequeue a buffer and wait on the fence associated with that buffer.  The
878  * buffer may safely be accessed immediately upon this function returning.  An
879  * error is returned if either of the dequeue or the wait operations fail.
880  */
native_window_dequeue_buffer_and_wait(ANativeWindow * anw,struct ANativeWindowBuffer ** anb)881 static inline int native_window_dequeue_buffer_and_wait(ANativeWindow *anw,
882         struct ANativeWindowBuffer** anb) {
883     return anw->dequeueBuffer_DEPRECATED(anw, anb);
884 }
885 
886 /*
887  * native_window_set_sideband_stream(..., native_handle_t*)
888  * Attach a sideband buffer stream to a native window.
889  */
native_window_set_sideband_stream(struct ANativeWindow * window,native_handle_t * sidebandHandle)890 static inline int native_window_set_sideband_stream(
891         struct ANativeWindow* window,
892         native_handle_t* sidebandHandle)
893 {
894     return window->perform(window, NATIVE_WINDOW_SET_SIDEBAND_STREAM,
895             sidebandHandle);
896 }
897 
898 /*
899  * native_window_set_surface_damage(..., android_native_rect_t* rects, int numRects)
900  * Set the surface damage (i.e., the region of the surface that has changed
901  * since the previous frame). The damage set by this call will be reset (to the
902  * default of full-surface damage) after calling queue, so this must be called
903  * prior to every frame with damage that does not cover the whole surface if the
904  * caller desires downstream consumers to use this optimization.
905  *
906  * The damage region is specified as an array of rectangles, with the important
907  * caveat that the origin of the surface is considered to be the bottom-left
908  * corner, as in OpenGL ES.
909  *
910  * If numRects is set to 0, rects may be NULL, and the surface damage will be
911  * set to the full surface (the same as if this function had not been called for
912  * this frame).
913  */
native_window_set_surface_damage(struct ANativeWindow * window,const android_native_rect_t * rects,size_t numRects)914 static inline int native_window_set_surface_damage(
915         struct ANativeWindow* window,
916         const android_native_rect_t* rects, size_t numRects)
917 {
918     return window->perform(window, NATIVE_WINDOW_SET_SURFACE_DAMAGE,
919             rects, numRects);
920 }
921 
922 /*
923  * native_window_set_shared_buffer_mode(..., bool sharedBufferMode)
924  * Enable/disable shared buffer mode
925  */
native_window_set_shared_buffer_mode(struct ANativeWindow * window,bool sharedBufferMode)926 static inline int native_window_set_shared_buffer_mode(
927         struct ANativeWindow* window,
928         bool sharedBufferMode)
929 {
930     return window->perform(window, NATIVE_WINDOW_SET_SHARED_BUFFER_MODE,
931             sharedBufferMode);
932 }
933 
934 /*
935  * native_window_set_auto_refresh(..., autoRefresh)
936  * Enable/disable auto refresh when in shared buffer mode
937  */
native_window_set_auto_refresh(struct ANativeWindow * window,bool autoRefresh)938 static inline int native_window_set_auto_refresh(
939         struct ANativeWindow* window,
940         bool autoRefresh)
941 {
942     return window->perform(window, NATIVE_WINDOW_SET_AUTO_REFRESH, autoRefresh);
943 }
944 
native_window_get_refresh_cycle_duration(struct ANativeWindow * window,int64_t * outRefreshDuration)945 static inline int native_window_get_refresh_cycle_duration(
946         struct ANativeWindow* window,
947         int64_t* outRefreshDuration)
948 {
949     return window->perform(window, NATIVE_WINDOW_GET_REFRESH_CYCLE_DURATION,
950             outRefreshDuration);
951 }
952 
native_window_get_next_frame_id(struct ANativeWindow * window,uint64_t * frameId)953 static inline int native_window_get_next_frame_id(
954         struct ANativeWindow* window, uint64_t* frameId)
955 {
956     return window->perform(window, NATIVE_WINDOW_GET_NEXT_FRAME_ID, frameId);
957 }
958 
native_window_enable_frame_timestamps(struct ANativeWindow * window,bool enable)959 static inline int native_window_enable_frame_timestamps(
960         struct ANativeWindow* window, bool enable)
961 {
962     return window->perform(window, NATIVE_WINDOW_ENABLE_FRAME_TIMESTAMPS,
963             enable);
964 }
965 
native_window_get_compositor_timing(struct ANativeWindow * window,int64_t * compositeDeadline,int64_t * compositeInterval,int64_t * compositeToPresentLatency)966 static inline int native_window_get_compositor_timing(
967         struct ANativeWindow* window,
968         int64_t* compositeDeadline, int64_t* compositeInterval,
969         int64_t* compositeToPresentLatency)
970 {
971     return window->perform(window, NATIVE_WINDOW_GET_COMPOSITOR_TIMING,
972             compositeDeadline, compositeInterval, compositeToPresentLatency);
973 }
974 
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)975 static inline int native_window_get_frame_timestamps(
976         struct ANativeWindow* window, uint64_t frameId,
977         int64_t* outRequestedPresentTime, int64_t* outAcquireTime,
978         int64_t* outLatchTime, int64_t* outFirstRefreshStartTime,
979         int64_t* outLastRefreshStartTime, int64_t* outGpuCompositionDoneTime,
980         int64_t* outDisplayPresentTime, int64_t* outDequeueReadyTime,
981         int64_t* outReleaseTime)
982 {
983     return window->perform(window, NATIVE_WINDOW_GET_FRAME_TIMESTAMPS,
984             frameId, outRequestedPresentTime, outAcquireTime, outLatchTime,
985             outFirstRefreshStartTime, outLastRefreshStartTime,
986             outGpuCompositionDoneTime, outDisplayPresentTime,
987             outDequeueReadyTime, outReleaseTime);
988 }
989 
native_window_get_wide_color_support(struct ANativeWindow * window,bool * outSupport)990 static inline int native_window_get_wide_color_support(
991     struct ANativeWindow* window, bool* outSupport) {
992     return window->perform(window, NATIVE_WINDOW_GET_WIDE_COLOR_SUPPORT,
993             outSupport);
994 }
995 
native_window_get_hdr_support(struct ANativeWindow * window,bool * outSupport)996 static inline int native_window_get_hdr_support(struct ANativeWindow* window,
997                                                 bool* outSupport) {
998     return window->perform(window, NATIVE_WINDOW_GET_HDR_SUPPORT, outSupport);
999 }
1000 
native_window_get_consumer_usage(struct ANativeWindow * window,uint64_t * outUsage)1001 static inline int native_window_get_consumer_usage(struct ANativeWindow* window,
1002                                                    uint64_t* outUsage) {
1003     return window->perform(window, NATIVE_WINDOW_GET_CONSUMER_USAGE64, outUsage);
1004 }
1005 
1006 /*
1007  * native_window_set_auto_prerotation(..., autoPrerotation)
1008  * Enable/disable the auto prerotation at buffer allocation when the buffer size
1009  * is driven by the consumer.
1010  *
1011  * When buffer size is driven by the consumer and the transform hint specifies
1012  * a 90 or 270 degree rotation, if auto prerotation is enabled, the width and
1013  * height used for dequeueBuffer will be additionally swapped.
1014  */
native_window_set_auto_prerotation(struct ANativeWindow * window,bool autoPrerotation)1015 static inline int native_window_set_auto_prerotation(struct ANativeWindow* window,
1016                                                      bool autoPrerotation) {
1017     return window->perform(window, NATIVE_WINDOW_SET_AUTO_PREROTATION, autoPrerotation);
1018 }
1019 
native_window_set_frame_rate(struct ANativeWindow * window,float frameRate,int8_t compatibility)1020 static inline int native_window_set_frame_rate(struct ANativeWindow* window, float frameRate,
1021                                                int8_t compatibility) {
1022     return window->perform(window, NATIVE_WINDOW_SET_FRAME_RATE, (double)frameRate,
1023                            (int)compatibility);
1024 }
1025 
1026 // ------------------------------------------------------------------------------------------------
1027 // Candidates for APEX visibility
1028 // These functions are planned to be made stable for APEX modules, but have not
1029 // yet been stabilized to a specific api version.
1030 // ------------------------------------------------------------------------------------------------
1031 
1032 /**
1033  * Retrieves the last queued buffer for this window, along with the fence that
1034  * fires when the buffer is ready to be read, and the 4x4 coordinate
1035  * transform matrix that should be applied to the buffer's content. The
1036  * transform matrix is represented in column-major order.
1037  *
1038  * If there was no buffer previously queued, then outBuffer will be NULL and
1039  * the value of outFence will be -1.
1040  *
1041  * Note that if outBuffer is not NULL, then the caller will hold a reference
1042  * onto the buffer. Accordingly, the caller must call AHardwareBuffer_release
1043  * when the buffer is no longer needed so that the system may reclaim the
1044  * buffer.
1045  *
1046  * \return NO_ERROR on success.
1047  * \return NO_MEMORY if there was insufficient memory.
1048  */
ANativeWindow_getLastQueuedBuffer(ANativeWindow * window,AHardwareBuffer ** outBuffer,int * outFence,float outTransformMatrix[16])1049 static inline int ANativeWindow_getLastQueuedBuffer(ANativeWindow* window,
1050                                                     AHardwareBuffer** outBuffer, int* outFence,
1051                                                     float outTransformMatrix[16]) {
1052     return window->perform(window, NATIVE_WINDOW_GET_LAST_QUEUED_BUFFER, outBuffer, outFence,
1053                            outTransformMatrix);
1054 }
1055 
1056 /**
1057  * Retrieves the last queued buffer for this window, along with the fence that
1058  * fires when the buffer is ready to be read. The cropRect & transform should be applied to the
1059  * buffer's content.
1060  *
1061  * If there was no buffer previously queued, then outBuffer will be NULL and
1062  * the value of outFence will be -1.
1063  *
1064  * Note that if outBuffer is not NULL, then the caller will hold a reference
1065  * onto the buffer. Accordingly, the caller must call AHardwareBuffer_release
1066  * when the buffer is no longer needed so that the system may reclaim the
1067  * buffer.
1068  *
1069  * \return NO_ERROR on success.
1070  * \return NO_MEMORY if there was insufficient memory.
1071  * \return STATUS_UNKNOWN_TRANSACTION if this ANativeWindow doesn't support this method, callers
1072  *         should fall back to ANativeWindow_getLastQueuedBuffer instead.
1073  */
ANativeWindow_getLastQueuedBuffer2(ANativeWindow * window,AHardwareBuffer ** outBuffer,int * outFence,ARect * outCropRect,uint32_t * outTransform)1074 static inline int ANativeWindow_getLastQueuedBuffer2(ANativeWindow* window,
1075                                                      AHardwareBuffer** outBuffer, int* outFence,
1076                                                      ARect* outCropRect, uint32_t* outTransform) {
1077     return window->perform(window, NATIVE_WINDOW_GET_LAST_QUEUED_BUFFER2, outBuffer, outFence,
1078                            outCropRect, outTransform);
1079 }
1080 
1081 /**
1082  * Retrieves an identifier for the next frame to be queued by this window.
1083  *
1084  * \return the next frame id.
1085  */
ANativeWindow_getNextFrameId(ANativeWindow * window)1086 static inline int64_t ANativeWindow_getNextFrameId(ANativeWindow* window) {
1087     int64_t value;
1088     window->perform(window, NATIVE_WINDOW_GET_NEXT_FRAME_ID, &value);
1089     return value;
1090 }
1091 
1092 /**
1093  * Prototype of the function that an ANativeWindow implementation would call
1094  * when ANativeWindow_query is called.
1095  */
1096 typedef int (*ANativeWindow_queryFn)(const ANativeWindow* window, int what, int* value);
1097 
1098 /**
1099  * Prototype of the function that intercepts an invocation of
1100  * ANativeWindow_queryFn, along with a data pointer that's passed by the
1101  * caller who set the interceptor, as well as arguments that would be
1102  * passed to ANativeWindow_queryFn if it were to be called.
1103  */
1104 typedef int (*ANativeWindow_queryInterceptor)(const ANativeWindow* window,
1105                                                 ANativeWindow_queryFn perform, void* data,
1106                                                 int what, int* value);
1107 
1108 /**
1109  * Registers an interceptor for ANativeWindow_query. Instead of calling
1110  * the underlying query function, instead the provided interceptor is
1111  * called, which may optionally call the underlying query function. An
1112  * optional data pointer is also provided to side-channel additional arguments.
1113  *
1114  * Note that usage of this should only be used for specialized use-cases by
1115  * either the system partition or to Mainline modules. This should never be
1116  * exposed to NDK or LL-NDK.
1117  *
1118  * Returns NO_ERROR on success, -errno if registration failed.
1119  */
ANativeWindow_setQueryInterceptor(ANativeWindow * window,ANativeWindow_queryInterceptor interceptor,void * data)1120 static inline int ANativeWindow_setQueryInterceptor(ANativeWindow* window,
1121                                             ANativeWindow_queryInterceptor interceptor,
1122                                             void* data) {
1123     return window->perform(window, NATIVE_WINDOW_SET_QUERY_INTERCEPTOR, interceptor, data);
1124 }
1125 
1126 __END_DECLS
1127