replicant-frameworks_native/libs/surfaceflinger/RFBServer.h
The Android Open Source Project 7c1b96a165 Initial Contribution
2008-10-21 07:00:00 -07:00

317 lines
11 KiB
C++

/*
* Copyright (C) 2007 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.
*/
#ifndef ANDROID_RFB_SERVER_H
#define ANDROID_RFB_SERVER_H
#include <stdint.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <utils/Errors.h>
#include <utils/threads.h>
#include <ui/Region.h>
#include <ui/PixelFormat.h>
#include <pixelflinger/pixelflinger.h>
#include "Barrier.h"
namespace android {
class SurfaceFlinger;
class RFBServer : public Thread
{
public:
RFBServer(uint32_t w, uint32_t h, android::PixelFormat format);
virtual ~RFBServer();
void frameBufferUpdated(const GGLSurface& front, const Region& reg);
bool isConnected() const;
private:
typedef uint8_t card8;
typedef uint16_t card16;
typedef uint32_t card32;
struct Message {
Message(size_t size);
virtual ~Message();
void* payload(int offset=0) {
return static_cast<char*>(mPayload)+offset;
}
void const * payload(int offset=0) const {
return static_cast<char const *>(mPayload)+offset;
}
size_t size() const { return mSize; }
protected:
Message(void* payload, size_t size);
status_t resize(size_t size);
private:
void* mPayload;
size_t mSize;
size_t mAllocatedSize;
};
struct ProtocolVersion : public Message {
ProtocolVersion(uint8_t major, uint8_t minor)
: Message(&messageData, 12) {
char* p = static_cast<char*>(payload());
snprintf(p, 13, "RFB %03u.%03u%c", major, minor, 0xA);
}
status_t decode(int& maj, int& min) {
char* p = static_cast<char*>(payload());
int n = sscanf(p, "RFB %03u.%03u", &maj, &min);
return (n == 2) ? NO_ERROR : NOT_ENOUGH_DATA;
}
private:
char messageData[12+1];
};
struct Authentication : public Message {
enum { Failed=0, None=1, Vnc=2 };
Authentication(int auth) : Message(&messageData, 4) {
*static_cast<card32*>(payload()) = htonl(auth);
}
private:
card32 messageData;
};
struct ClientInitialization : public Message {
ClientInitialization() : Message(&messageData, 1) { }
int sharedFlags() {
return messageData;
}
private:
card8 messageData;
};
struct PixelFormat {
card8 bitsPerPixel;
card8 depth;
card8 bigEndianFlag;
card8 trueColorFlag;
card16 redMax;
card16 greenMax;
card16 blueMax;
card8 redShift;
card8 greenShift;
card8 blueShift;
uint8_t padding[3];
} __attribute__((packed));
struct ServerInitialization : public Message {
ServerInitialization(char const * name)
: Message(sizeof(Payload) + strlen(name))
{
const size_t nameLength = size() - sizeof(Payload);
message().nameLength = htonl(nameLength);
memcpy((char*)message().nameString, name,nameLength);
}
struct Payload {
card16 framebufferWidth;
card16 framebufferHeight;
PixelFormat serverPixelFormat;
card32 nameLength;
card8 nameString[0];
} __attribute__((packed));
Payload& message() {
return *static_cast<Payload*>(payload());
}
};
// client messages...
struct SetPixelFormat {
card8 type;
uint8_t padding[3];
PixelFormat pixelFormat;
} __attribute__((packed));
struct SetEncodings {
enum { Raw=0, CoR=1, RRE=2, CoRRE=4, Hextile=5 };
card8 type;
uint8_t padding;
card16 numberOfEncodings;
card32 encodings[0];
} __attribute__((packed));
struct FrameBufferUpdateRequest {
card8 type;
card8 incremental;
card16 x;
card16 y;
card16 width;
card16 height;
} __attribute__((packed));
struct KeyEvent {
card8 type;
card8 downFlag;
uint8_t padding[2];
card32 key;
} __attribute__((packed));
struct PointerEvent {
card8 type;
card8 buttonMask;
card16 x;
card16 y;
} __attribute__((packed));
struct ClientCutText {
card8 type;
uint8_t padding[3];
card32 length;
card8 text[0];
} __attribute__((packed));
union ClientMessages {
card8 type;
SetPixelFormat setPixelFormat;
SetEncodings setEncodings;
FrameBufferUpdateRequest frameBufferUpdateRequest;
KeyEvent keyEvent;
PointerEvent pointerEvent;
ClientCutText clientCutText;
};
struct Rectangle {
card16 x;
card16 y;
card16 w;
card16 h;
card32 encoding;
} __attribute__((packed));
struct FrameBufferUpdate {
card8 type;
uint8_t padding;
card16 numberOfRectangles;
Rectangle rectangles[0];
} __attribute__((packed));
enum {
SET_PIXEL_FORMAT = 0,
FIX_COLOUR_MAP_ENTRIES = 1,
SET_ENCODINGS = 2,
FRAME_BUFFER_UPDATE_REQ = 3,
KEY_EVENT = 4,
POINTER_EVENT = 5,
CLIENT_CUT_TEXT = 6,
};
struct ClientMessage : public Message {
ClientMessage()
: Message(&messageData, sizeof(messageData)) {
}
const ClientMessages& messages() const {
return *static_cast<ClientMessages const *>(payload());
}
const int type() const {
return messages().type;
}
status_t resize(size_t size) {
return Message::resize(size);
}
ClientMessages messageData;
};
class ServerThread : public Thread
{
friend class RFBServer;
public:
ServerThread(const sp<RFBServer>& receiver);
virtual ~ServerThread();
void wake();
void exitAndWait();
private:
virtual bool threadLoop();
virtual status_t readyToRun();
virtual void onFirstRef();
wp<RFBServer> mReceiver;
bool (RFBServer::*mAction)();
Barrier mUpdateBarrier;
};
class EventInjector {
public:
enum { UP=0, DOWN=1 };
EventInjector();
~EventInjector();
void injectKey(uint16_t code, uint16_t value);
private:
struct input_event {
struct timeval time;
uint16_t type;
uint16_t code;
uint32_t value;
};
int mFD;
};
void handshake(uint8_t major, uint8_t minor, uint32_t auth);
void waitForClientMessage(ClientMessage& msg);
void handleClientMessage(const ClientMessage& msg);
void handleSetPixelFormat(const SetPixelFormat& msg);
void handleSetEncodings(const SetEncodings& msg);
void handleFrameBufferUpdateReq(const FrameBufferUpdateRequest& msg);
void handleKeyEvent(const KeyEvent& msg);
void sendFrameBufferUpdates();
bool validatePixelFormat(const PixelFormat& pf);
bool alive() const;
bool write(const Message& msg);
bool read(Message& msg);
bool write(const void* buffer, int size);
bool read(void* buffer, int size);
virtual bool threadLoop();
virtual status_t readyToRun();
virtual void onFirstRef();
sp<ServerThread> mRobinThread;
int mFD;
int mStatus;
iovec* mIoVec;
EventInjector mEventInjector;
Mutex mRegionLock;
// This is the region requested by the client since the last
// time we updated it
Region mClientRegionRequest;
// This is the region of the screen that needs to be sent to the
// client since the last time we updated it.
// Typically this is the dirty region, but not necessarily, for
// instance if the client asked for a non incremental update.
Region mDirtyRegion;
GGLSurface mFrameBuffer;
GGLSurface mFrontBuffer;
};
}; // namespace android
#endif // ANDROID_RFB_SERVER_H