|  | /* | 
|  | * Copyright 2018 The Android Open Source Project | 
|  | * | 
|  | * Licensed under the Apache License, Version 2.0 (the "License"); | 
|  | * you may not use this file except in compliance with the License. | 
|  | * You may obtain a copy of the License at | 
|  | * | 
|  | *      http://www.apache.org/licenses/LICENSE-2.0 | 
|  | * | 
|  | * Unless required by applicable law or agreed to in writing, software | 
|  | * distributed under the License is distributed on an "AS IS" BASIS, | 
|  | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 
|  | * See the License for the specific language governing permissions and | 
|  | * limitations under the License. | 
|  | */ | 
|  |  | 
|  | /** | 
|  | * @addtogroup NativeActivity Native Activity | 
|  | * @{ | 
|  | */ | 
|  |  | 
|  | /** | 
|  | * @file surface_control.h | 
|  | */ | 
|  |  | 
|  | #ifndef ANDROID_SURFACE_CONTROL_H | 
|  | #define ANDROID_SURFACE_CONTROL_H | 
|  |  | 
|  | #include <sys/cdefs.h> | 
|  |  | 
|  | #include <android/data_space.h> | 
|  | #include <android/hardware_buffer.h> | 
|  | #include <android/hdr_metadata.h> | 
|  | #include <android/native_window.h> | 
|  |  | 
|  | __BEGIN_DECLS | 
|  |  | 
|  | #if __ANDROID_API__ >= 29 | 
|  |  | 
|  | struct ASurfaceControl; | 
|  |  | 
|  | /** | 
|  | * The SurfaceControl API can be used to provide a hierarchy of surfaces for | 
|  | * composition to the system compositor. ASurfaceControl represents a content node in | 
|  | * this hierarchy. | 
|  | */ | 
|  | typedef struct ASurfaceControl ASurfaceControl; | 
|  |  | 
|  | /* | 
|  | * Creates an ASurfaceControl with either ANativeWindow or an ASurfaceControl as its parent. | 
|  | * |debug_name| is a debug name associated with this surface. It can be used to | 
|  | * identify this surface in the SurfaceFlinger's layer tree. It must not be | 
|  | * null. | 
|  | * | 
|  | * The caller takes ownership of the ASurfaceControl returned and must release it | 
|  | * using ASurfaceControl_release below. | 
|  | */ | 
|  | ASurfaceControl* ASurfaceControl_createFromWindow(ANativeWindow* parent, const char* debug_name) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | ASurfaceControl* ASurfaceControl_create(ASurfaceControl* parent, const char* debug_name) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Releases the |surface_control| object. After releasing the ASurfaceControl the caller no longer | 
|  | * has ownership of the AsurfaceControl. The surface and it's children may remain on display as long | 
|  | * as their parent remains on display. | 
|  | */ | 
|  | void ASurfaceControl_release(ASurfaceControl* surface_control) __INTRODUCED_IN(29); | 
|  |  | 
|  | struct ASurfaceTransaction; | 
|  |  | 
|  | /** | 
|  | * ASurfaceTransaction is a collection of updates to the surface tree that must | 
|  | * be applied atomically. | 
|  | */ | 
|  | typedef struct ASurfaceTransaction ASurfaceTransaction; | 
|  |  | 
|  | /** | 
|  | * The caller takes ownership of the transaction and must release it using | 
|  | * ASurfaceControl_delete below. | 
|  | */ | 
|  | ASurfaceTransaction* ASurfaceTransaction_create() __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Destroys the |transaction| object. | 
|  | */ | 
|  | void ASurfaceTransaction_delete(ASurfaceTransaction* transaction) __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Applies the updates accumulated in |transaction|. | 
|  | * | 
|  | * Note that the transaction is guaranteed to be applied atomically. The | 
|  | * transactions which are applied on the same thread are also guaranteed to be | 
|  | * applied in order. | 
|  | */ | 
|  | void ASurfaceTransaction_apply(ASurfaceTransaction* transaction) __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * An opaque handle returned during a callback that can be used to query general stats and stats for | 
|  | * surfaces which were either removed or for which buffers were updated after this transaction was | 
|  | * applied. | 
|  | */ | 
|  | typedef struct ASurfaceTransactionStats ASurfaceTransactionStats; | 
|  |  | 
|  | /** | 
|  | * Since the transactions are applied asynchronously, the | 
|  | * ASurfaceTransaction_OnComplete callback can be used to be notified when a frame | 
|  | * including the updates in a transaction was presented. | 
|  | * | 
|  | * |context| is the optional context provided by the client that is passed into | 
|  | * the callback. | 
|  | * | 
|  | * |stats| is an opaque handle that can be passed to ASurfaceTransactionStats functions to query | 
|  | * information about the transaction. The handle is only valid during the callback. | 
|  | * | 
|  | * THREADING | 
|  | * The transaction completed callback can be invoked on any thread. | 
|  | */ | 
|  | typedef void (*ASurfaceTransaction_OnComplete)(void* context, ASurfaceTransactionStats* stats) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Returns the timestamp of when the frame was latched by the framework. Once a frame is | 
|  | * latched by the framework, it is presented at the following hardware vsync. | 
|  | */ | 
|  | int64_t ASurfaceTransactionStats_getLatchTime(ASurfaceTransactionStats* surface_transaction_stats) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Returns a sync fence that signals when the transaction has been presented. | 
|  | * The recipient of the callback takes ownership of the fence and is responsible for closing | 
|  | * it. | 
|  | */ | 
|  | int ASurfaceTransactionStats_getPresentFenceFd(ASurfaceTransactionStats* surface_transaction_stats) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * |outASurfaceControls| returns an array of ASurfaceControl pointers that were updated during the | 
|  | * transaction. Stats for the surfaces can be queried through ASurfaceTransactionStats functions. | 
|  | * When the client is done using the array, it must release it by calling | 
|  | * ASurfaceTransactionStats_releaseASurfaceControls. | 
|  | * | 
|  | * |outASurfaceControlsSize| returns the size of the ASurfaceControls array. | 
|  | */ | 
|  | void ASurfaceTransactionStats_getASurfaceControls(ASurfaceTransactionStats* surface_transaction_stats, | 
|  | ASurfaceControl*** outASurfaceControls, | 
|  | size_t* outASurfaceControlsSize) | 
|  | __INTRODUCED_IN(29); | 
|  | /** | 
|  | * Releases the array of ASurfaceControls that were returned by | 
|  | * ASurfaceTransactionStats_getASurfaceControls. | 
|  | */ | 
|  | void ASurfaceTransactionStats_releaseASurfaceControls(ASurfaceControl** surface_controls) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Returns the timestamp of when the CURRENT buffer was acquired. A buffer is considered | 
|  | * acquired when its acquire_fence_fd has signaled. A buffer cannot be latched or presented until | 
|  | * it is acquired. If no acquire_fence_fd was provided, this timestamp will be set to -1. | 
|  | */ | 
|  | int64_t ASurfaceTransactionStats_getAcquireTime(ASurfaceTransactionStats* surface_transaction_stats, | 
|  | ASurfaceControl* surface_control) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * The returns the fence used to signal the release of the PREVIOUS buffer set on | 
|  | * this surface. If this fence is valid (>=0), the PREVIOUS buffer has not yet been released and the | 
|  | * fence will signal when the PREVIOUS buffer has been released. If the fence is -1 , the PREVIOUS | 
|  | * buffer is already released. The recipient of the callback takes ownership of the | 
|  | * previousReleaseFenceFd and is responsible for closing it. | 
|  | * | 
|  | * Each time a buffer is set through ASurfaceTransaction_setBuffer()/_setCachedBuffer() on a | 
|  | * transaction which is applied, the framework takes a ref on this buffer. The framework treats the | 
|  | * addition of a buffer to a particular surface as a unique ref. When a transaction updates or | 
|  | * removes a buffer from a surface, or removes the surface itself from the tree, this ref is | 
|  | * guaranteed to be released in the OnComplete callback for this transaction. The | 
|  | * ASurfaceControlStats provided in the callback for this surface may contain an optional fence | 
|  | * which must be signaled before the ref is assumed to be released. | 
|  | * | 
|  | * The client must ensure that all pending refs on a buffer are released before attempting to reuse | 
|  | * this buffer, otherwise synchronization errors may occur. | 
|  | */ | 
|  | int ASurfaceTransactionStats_getPreviousReleaseFenceFd( | 
|  | ASurfaceTransactionStats* surface_transaction_stats, | 
|  | ASurfaceControl* surface_control) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Sets the callback that will be invoked when the updates from this transaction | 
|  | * are presented. For details on the callback semantics and data, see the | 
|  | * comments on the ASurfaceTransaction_OnComplete declaration above. | 
|  | */ | 
|  | void ASurfaceTransaction_setOnComplete(ASurfaceTransaction* transaction, void* context, | 
|  | ASurfaceTransaction_OnComplete func) __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Reparents the |surface_control| from its old parent to the |new_parent| surface control. | 
|  | * Any children of the* reparented |surface_control| will remain children of the |surface_control|. | 
|  | * | 
|  | * The |new_parent| can be null. Surface controls with a null parent do not appear on the display. | 
|  | */ | 
|  | void ASurfaceTransaction_reparent(ASurfaceTransaction* transaction, | 
|  | ASurfaceControl* surface_control, ASurfaceControl* new_parent) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /* Parameter for ASurfaceTransaction_setVisibility */ | 
|  | enum { | 
|  | ASURFACE_TRANSACTION_VISIBILITY_HIDE = 0, | 
|  | ASURFACE_TRANSACTION_VISIBILITY_SHOW = 1, | 
|  | }; | 
|  | /** | 
|  | * Updates the visibility of |surface_control|. If show is set to | 
|  | * ASURFACE_TRANSACTION_VISIBILITY_HIDE, the |surface_control| and all surfaces in its subtree will | 
|  | * be hidden. | 
|  | */ | 
|  | void ASurfaceTransaction_setVisibility(ASurfaceTransaction* transaction, | 
|  | ASurfaceControl* surface_control, int8_t visibility) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Updates the z order index for |surface_control|. Note that the z order for a surface | 
|  | * is relative to other surfaces which are siblings of this surface. The behavior of sibilings with | 
|  | * the same z order is undefined. | 
|  | * | 
|  | * Z orders may be from MIN_INT32 to MAX_INT32. A layer's default z order index is 0. | 
|  | */ | 
|  | void ASurfaceTransaction_setZOrder(ASurfaceTransaction* transaction, | 
|  | ASurfaceControl* surface_control, int32_t z_order) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Updates the AHardwareBuffer displayed for |surface_control|. If not -1, the | 
|  | * acquire_fence_fd should be a file descriptor that is signaled when all pending work | 
|  | * for the buffer is complete and the buffer can be safely read. | 
|  | * | 
|  | * The frameworks takes ownership of the |acquire_fence_fd| passed and is responsible | 
|  | * for closing it. | 
|  | */ | 
|  | void ASurfaceTransaction_setBuffer(ASurfaceTransaction* transaction, | 
|  | ASurfaceControl* surface_control, AHardwareBuffer* buffer, | 
|  | int acquire_fence_fd = -1) __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Updates the color for |surface_control|.  This will make the background color for the | 
|  | * ASurfaceControl visible in transparent regions of the surface.  Colors |r|, |g|, | 
|  | * and |b| must be within the range that is valid for |dataspace|.  |dataspace| and |alpha| | 
|  | * will be the dataspace and alpha set for the background color layer. | 
|  | */ | 
|  | void ASurfaceTransaction_setColor(ASurfaceTransaction* transaction, | 
|  | ASurfaceControl* surface_control, float r, float g, float b, | 
|  | float alpha, ADataSpace dataspace) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * |source| the sub-rect within the buffer's content to be rendered inside the surface's area | 
|  | * The surface's source rect is clipped by the bounds of its current buffer. The source rect's width | 
|  | * and height must be > 0. | 
|  | * | 
|  | * |destination| specifies the rect in the parent's space where this surface will be drawn. The post | 
|  | * source rect bounds are scaled to fit the destination rect. The surface's destination rect is | 
|  | * clipped by the bounds of its parent. The destination rect's width and height must be > 0. | 
|  | * | 
|  | * |transform| the transform applied after the source rect is applied to the buffer. This parameter | 
|  | * should be set to 0 for no transform. To specify a transfrom use the NATIVE_WINDOW_TRANSFORM_* | 
|  | * enum. | 
|  | */ | 
|  | void ASurfaceTransaction_setGeometry(ASurfaceTransaction* transaction, | 
|  | ASurfaceControl* surface_control, const ARect& source, | 
|  | const ARect& destination, int32_t transform) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  |  | 
|  | /* Parameter for ASurfaceTransaction_setBufferTransparency */ | 
|  | enum { | 
|  | ASURFACE_TRANSACTION_TRANSPARENCY_TRANSPARENT = 0, | 
|  | ASURFACE_TRANSACTION_TRANSPARENCY_TRANSLUCENT = 1, | 
|  | ASURFACE_TRANSACTION_TRANSPARENCY_OPAQUE = 2, | 
|  | }; | 
|  | /** | 
|  | * Updates whether the content for the buffer associated with this surface is | 
|  | * completely opaque. If true, every pixel of content inside the buffer must be | 
|  | * opaque or visual errors can occur. | 
|  | */ | 
|  | void ASurfaceTransaction_setBufferTransparency(ASurfaceTransaction* transaction, | 
|  | ASurfaceControl* surface_control, | 
|  | int8_t transparency) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Updates the region for the content on this surface updated in this | 
|  | * transaction. If unspecified, the complete surface is assumed to be damaged. | 
|  | */ | 
|  | void ASurfaceTransaction_setDamageRegion(ASurfaceTransaction* transaction, | 
|  | ASurfaceControl* surface_control, const ARect rects[], | 
|  | uint32_t count) __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Specifies a desiredPresentTime for the transaction. The framework will try to present | 
|  | * the transaction at or after the time specified. | 
|  | * | 
|  | * Transactions will not be presented until all of their acquire fences have signaled even if the | 
|  | * app requests an earlier present time. | 
|  | * | 
|  | * If an earlier transaction has a desired present time of x, and a later transaction has a desired | 
|  | * present time that is before x, the later transaction will not preempt the earlier transaction. | 
|  | */ | 
|  | void ASurfaceTransaction_setDesiredPresentTime(ASurfaceTransaction* transaction, | 
|  | int64_t desiredPresentTime) __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Sets the alpha for the buffer. It uses a premultiplied blending. | 
|  | * | 
|  | * The |alpha| must be between 0.0 and 1.0. | 
|  | */ | 
|  | void ASurfaceTransaction_setBufferAlpha(ASurfaceTransaction* transaction, | 
|  | ASurfaceControl* surface_control, float alpha) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /** | 
|  | * Sets the data space of the surface_control's buffers. | 
|  | * | 
|  | * If no data space is set, the surface control defaults to ADATASPACE_SRGB. | 
|  | */ | 
|  | void ASurfaceTransaction_setBufferDataSpace(ASurfaceTransaction* transaction, | 
|  | ASurfaceControl* surface_control, ADataSpace data_space) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /* | 
|  | * SMPTE ST 2086 "Mastering Display Color Volume" static metadata | 
|  | * | 
|  | * When |metadata| is set to null, the framework does not use any smpte2086 metadata when rendering | 
|  | * the surface's buffer. | 
|  | */ | 
|  | void ASurfaceTransaction_setHdrMetadata_smpte2086(ASurfaceTransaction* transaction, | 
|  | ASurfaceControl* surface_control, | 
|  | struct AHdrMetadata_smpte2086* metadata) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | /* | 
|  | * Sets the CTA 861.3 "HDR Static Metadata Extension" static metadata on a surface. | 
|  | * | 
|  | * When |metadata| is set to null, the framework does not use any cta861.3 metadata when rendering | 
|  | * the surface's buffer. | 
|  | */ | 
|  | void ASurfaceTransaction_setHdrMetadata_cta861_3(ASurfaceTransaction* transaction, | 
|  | ASurfaceControl* surface_control, | 
|  | struct AHdrMetadata_cta861_3* metadata) | 
|  | __INTRODUCED_IN(29); | 
|  |  | 
|  | #endif // __ANDROID_API__ >= 29 | 
|  |  | 
|  | __END_DECLS | 
|  |  | 
|  | #endif // ANDROID_SURFACE_CONTROL_H |