1 /* 2 * Copyright 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _ANDROID_GRAPHICS_SURFACE_TEXTURE_PLATFORM_H 18 #define _ANDROID_GRAPHICS_SURFACE_TEXTURE_PLATFORM_H 19 20 #include <EGL/egl.h> 21 #include <EGL/eglext.h> 22 #include <nativehelper/JNIHelp.h> 23 #include <system/graphics.h> 24 25 // This file provides a facade API on top of SurfaceTexture, which avoids using 26 // C++ types. This is still a C++ unstable API though. Ideally features here 27 // will be exposed via public NDK API and this file will be deleted. 28 29 struct ASurfaceTexture; 30 31 namespace android { 32 33 // Trampoline functions allowing libandroid.so to define the NDK symbols without including 34 // the entirety of libnativedisplay as a whole static lib. As libnativedisplay 35 // maintains global state, libnativedisplay can never be directly statically 36 // linked so that global state won't be duplicated. This way libandroid.so can 37 // reroute the NDK methods into the implementations defined by libnativedisplay 38 ANativeWindow* ASurfaceTexture_routeAcquireANativeWindow(ASurfaceTexture* st); 39 int ASurfaceTexture_routeAttachToGLContext(ASurfaceTexture* st, uint32_t texName); 40 int ASurfaceTexture_routeDetachFromGLContext(ASurfaceTexture* st); 41 void ASurfaceTexture_routeRelease(ASurfaceTexture* st); 42 int ASurfaceTexture_routeUpdateTexImage(ASurfaceTexture* st); 43 void ASurfaceTexture_routeGetTransformMatrix(ASurfaceTexture* st, float mtx[16]); 44 int64_t ASurfaceTexture_routeGetTimestamp(ASurfaceTexture* st); 45 ASurfaceTexture* ASurfaceTexture_routeFromSurfaceTexture(JNIEnv* env, jobject surfacetexture); 46 47 /** 48 * ASurfaceTexture_getCurrentTextureTarget returns the texture target of the 49 * current texture. 50 */ 51 unsigned int ASurfaceTexture_getCurrentTextureTarget(ASurfaceTexture* st); 52 53 /** 54 * ASurfaceTexture_takeConsumerOwnership attaches an ASurfaceTexture that is 55 * currently in the 'detached' state to a consumer context. 56 */ 57 void ASurfaceTexture_takeConsumerOwnership(ASurfaceTexture* st); 58 59 /** 60 * ASurfaceTexture_releaseConsumerOwnership detaches a SurfaceTexture from 61 * a consumer context. 62 */ 63 void ASurfaceTexture_releaseConsumerOwnership(ASurfaceTexture* st); 64 65 /** 66 * Callback function needed by ASurfaceTexture_dequeueBuffer. It creates a 67 * fence that is signalled when the previous buffer is no longer in use by the 68 * consumer (usually HWUI RenderThread) and can be written to by the producer. 69 */ 70 typedef int (*ASurfaceTexture_createReleaseFence)(bool useFenceSync, EGLSyncKHR* eglFence, 71 EGLDisplay* display, int* releaseFence, 72 void* fencePassThroughHandle); 73 74 /** 75 * Callback function needed by ASurfaceTexture_dequeueBuffer. It waits for the 76 * new buffer fence to signal before issuing any draw commands. 77 */ 78 typedef int (*ASurfaceTexture_fenceWait)(int fence, void* fencePassThroughHandle); 79 80 /** 81 * ASurfaceTexture_dequeueBuffer returns the next available AHardwareBuffer. 82 * The caller gets ownership of the buffer and need to release it with 83 * AHardwareBuffer_release. 84 */ 85 AHardwareBuffer* ASurfaceTexture_dequeueBuffer(ASurfaceTexture* st, int* outSlotid, 86 android_dataspace* outDataspace, 87 float* outTransformMatrix, bool* outNewContent, 88 ASurfaceTexture_createReleaseFence createFence, 89 ASurfaceTexture_fenceWait fenceWait, 90 void* fencePassThroughHandle); 91 92 } // namespace android 93 94 #endif // _ANDROID_GRAPHICS_SURFACE_TEXTURE_PLATFORM_H 95