abe815dd69
We're not using IMemoryHeap as a transport anymore, instead we're providing a CpuConsumer and use the IGraphicBufferProducer version of the screenshot API. However, some GPU drivers don't support properly a GPU to CPU path, to work around this, we use a temporary BufferQueue on the server side for the GL rendering, and we use glReadPixels into the CpuConsumer (we're now using a CPU to CPU path which is always supported). Currently this "wrapping" is always performed, but it can be bypassed on devices that support the GPU to CPU path. This also addresses a DoS attack vector on SurfaceFlinger, where an application could consume all of SF's filedescriptors by creating a lot of screenshots in a row. Bug: 8390553 Change-Id: I9e81514c2a7711b9bb393f74305be7d2abe08f1c
153 lines
4.7 KiB
C++
153 lines
4.7 KiB
C++
/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_GUI_ISURFACE_COMPOSER_H
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#define ANDROID_GUI_ISURFACE_COMPOSER_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/RefBase.h>
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#include <utils/Errors.h>
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#include <binder/IInterface.h>
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#include <ui/PixelFormat.h>
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#include <gui/IGraphicBufferAlloc.h>
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#include <gui/ISurfaceComposerClient.h>
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namespace android {
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// ----------------------------------------------------------------------------
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class ComposerState;
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class DisplayState;
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class DisplayInfo;
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class IDisplayEventConnection;
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class IMemoryHeap;
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/*
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* This class defines the Binder IPC interface for accessing various
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* SurfaceFlinger features.
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*/
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class ISurfaceComposer: public IInterface {
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public:
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DECLARE_META_INTERFACE(SurfaceComposer);
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// flags for setTransactionState()
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enum {
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eSynchronous = 0x01,
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eAnimation = 0x02,
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};
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enum {
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eDisplayIdMain = 0,
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eDisplayIdHdmi = 1
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};
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/* create connection with surface flinger, requires
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* ACCESS_SURFACE_FLINGER permission
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*/
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virtual sp<ISurfaceComposerClient> createConnection() = 0;
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/* create a graphic buffer allocator
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*/
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virtual sp<IGraphicBufferAlloc> createGraphicBufferAlloc() = 0;
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/* return an IDisplayEventConnection */
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virtual sp<IDisplayEventConnection> createDisplayEventConnection() = 0;
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/* create a display
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* requires ACCESS_SURFACE_FLINGER permission.
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*/
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virtual sp<IBinder> createDisplay(const String8& displayName,
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bool secure) = 0;
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/* get the token for the existing default displays. possible values
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* for id are eDisplayIdMain and eDisplayIdHdmi.
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*/
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virtual sp<IBinder> getBuiltInDisplay(int32_t id) = 0;
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/* open/close transactions. requires ACCESS_SURFACE_FLINGER permission */
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virtual void setTransactionState(const Vector<ComposerState>& state,
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const Vector<DisplayState>& displays, uint32_t flags) = 0;
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/* signal that we're done booting.
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* Requires ACCESS_SURFACE_FLINGER permission
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*/
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virtual void bootFinished() = 0;
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/* verify that an IGraphicBufferProducer was created by SurfaceFlinger.
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*/
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virtual bool authenticateSurfaceTexture(
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const sp<IGraphicBufferProducer>& surface) const = 0;
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/* triggers screen off and waits for it to complete
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* requires ACCESS_SURFACE_FLINGER permission.
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*/
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virtual void blank(const sp<IBinder>& display) = 0;
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/* triggers screen on and waits for it to complete
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* requires ACCESS_SURFACE_FLINGER permission.
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*/
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virtual void unblank(const sp<IBinder>& display) = 0;
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/* returns information about a display
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* intended to be used to get information about built-in displays */
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virtual status_t getDisplayInfo(const sp<IBinder>& display, DisplayInfo* info) = 0;
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/* Capture the specified screen. requires READ_FRAME_BUFFER permission
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* This function will fail if there is a secure window on screen.
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*/
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virtual status_t captureScreen(const sp<IBinder>& display,
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const sp<IGraphicBufferProducer>& producer,
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uint32_t reqWidth, uint32_t reqHeight,
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uint32_t minLayerZ, uint32_t maxLayerZ,
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bool isCpuConsumer) = 0;
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};
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// ----------------------------------------------------------------------------
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class BnSurfaceComposer: public BnInterface<ISurfaceComposer> {
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public:
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enum {
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// Note: BOOT_FINISHED must remain this value, it is called from
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// Java by ActivityManagerService.
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BOOT_FINISHED = IBinder::FIRST_CALL_TRANSACTION,
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CREATE_CONNECTION,
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CREATE_GRAPHIC_BUFFER_ALLOC,
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CREATE_DISPLAY_EVENT_CONNECTION,
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CREATE_DISPLAY,
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GET_BUILT_IN_DISPLAY,
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SET_TRANSACTION_STATE,
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AUTHENTICATE_SURFACE,
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BLANK,
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UNBLANK,
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GET_DISPLAY_INFO,
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CONNECT_DISPLAY,
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CAPTURE_SCREEN,
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};
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virtual status_t onTransact(uint32_t code, const Parcel& data,
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Parcel* reply, uint32_t flags = 0);
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};
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// ----------------------------------------------------------------------------
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}; // namespace android
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#endif // ANDROID_GUI_ISURFACE_COMPOSER_H
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