The offical µGFX repository.
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 

431 lines
12 KiB

/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
#include "gfx.h"
#include "drivers/multiple/uGFXnet/uGFXnetProtocol.h"
#ifndef GDISP_GFXNET_PORT
#define GDISP_GFXNET_PORT GNETCODE_DEFAULT_PORT
#endif
// This definition is only required for for O/S's that don't support a command line eg ChibiOS
// It is ignored by those that do support a command line.
#ifndef GDISP_GFXNET_HOST
#define GDISP_GFXNET_HOST "127.0.0.1" // Change this to your uGFXnet host.
#endif
// Do we wish to use old style socket calls. Some socket libraries only support the old version.
// It is better to use the new version where possible however as it also supports IPv6.
#ifndef OLD_STYLE_SOCKETS
#define OLD_STYLE_SOCKETS GFXOFF
#endif
// Which operating systems support a command line
#if defined(WIN32) || GFX_USE_OS_WIN32 || GFX_USE_OS_OSX || GFX_USE_OS_LINUX
#define EMBEDED_OS GFXOFF
#else
#define EMBEDED_OS GFXON
#endif
#if GNETCODE_VERSION != GNETCODE_VERSION_1_0
#error "This uGFXnet display only supports protocol V1.0"
#endif
#if GDISP_PIXELFORMAT != GNETCODE_PIXELFORMAT
#error "Oops - The uGFXnet protocol requires a different pixel format. Try defining GDISP_PIXELFORMAT in your gfxconf.h file."
#endif
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#if defined(WIN32) || GFX_USE_OS_WIN32
#if OLD_STYLE_SOCKETS
#include <winsock.h>
#else
#include <ws2tcpip.h>
#include <winsock2.h>
#endif
#define SOCKET_TYPE SOCKET
static void StopSockets(void) {
WSACleanup();
}
static void StartSockets(void) {
WSADATA wsaData;
if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0)
gfxHalt("GDISP: uGFXnet - WSAStartup failed");
atexit(StopSockets);
}
#elif GFX_USE_OS_LINUX || GFX_USE_OS_OSX
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#define closesocket(fd) close(fd)
#define ioctlsocket(fd,cmd,arg) ioctl(fd,cmd,arg)
#define StartSockets()
#define SOCKET_TYPE int
#else
#include <lwip/sockets.h>
#include <lwip/netdb.h>
#if GDISP_GFXNET_CUSTOM_LWIP_STARTUP
extern void Start_LWIP(void); // Where the application does the lwip stack setup
#define StartSockets() Start_LWIP();
#else
#include "lwipthread.h"
#define StartSockets() gfxThreadClose(gfxThreadCreate(wa_lwip_thread, LWIP_THREAD_STACK_SIZE, gThreadpriorityNormal, lwip_thread, 0))
#endif
#if !LWIP_SOCKET
#error "GDISP: uGFXnet - LWIP_SOCKETS must be defined in your lwipopts.h file"
#endif
#if !LWIP_COMPAT_SOCKETS
#error "GDISP: uGFXnet - LWIP_COMPAT_SOCKETS must be defined in your lwipopts.h file"
#endif
#if !LWIP_DNS
#error "GDISP: uGFXnet - LWIP_DNS must be defined in your lwipopts.h file"
#endif
#define SOCKET_TYPE int
// Mutex protection is required for LWIP
#if !GDISP_GFXNET_UNSAFE_SOCKETS
#if GFX_COMPILER_WARNING_TYPE == GFX_COMPILER_WARNING_DIRECT
#warning "GDISP: uGFXnet - LWIP sockets are not thread-safe. GDISP_GFXNET_UNSAFE_SOCKETS has been turned on for you."
#elif GFX_COMPILER_WARNING_TYPE == GFX_COMPILER_WARNING_MACRO
COMPILER_WARNING("GDISP: uGFXnet - LWIP sockets are not thread-safe. GDISP_GFXNET_UNSAFE_SOCKETS has been turned on for you.")
#endif
#undef GDISP_GFXNET_UNSAFE_SOCKETS
#define GDISP_GFXNET_UNSAFE_SOCKETS GFXON
#endif
#endif
#if GFX_USE_GINPUT && GINPUT_NEED_MOUSE
static GListener gl;
#endif
static SOCKET_TYPE netfd = (SOCKET_TYPE)-1;
static gFont font;
#define STRINGOF_RAW(s) #s
#define STRINGOF(s) STRINGOF_RAW(s)
#if EMBEDED_OS
#define cmd_args
#define proto_args void
#define xhost GDISP_GFXNET_HOST
#define xport STRINGOF(GDISP_GFXNET_HOST)
#define xportnum GDISP_GFXNET_HOST
#else
#define cmd_args argc, argv
#define proto_args int argc, char **argv
static char * xhost;
static char * xport;
#if OLD_STYLE_SOCKETS
static int xportnum = GDISP_GFXNET_PORT;
#endif
#endif
/**
* Get a whole packet of data.
* Len is specified in the number of uint16_t's we want as our protocol only talks uint16_t's.
* If the connection closes before we get all the data - the call returns gFalse.
*/
static gBool getpkt(uint16_t *pkt, int len) {
int got;
int have;
// Get the packet of data
len *= sizeof(uint16_t);
have = 0;
while(len && (got = recv(netfd, ((char *)pkt)+have, len, 0)) > 0) {
have += got;
len -= got;
}
if (len)
return gFalse;
// Convert each uint16_t to host order
for(got = 0, have /= 2; got < have; got++)
pkt[got] = ntohs(pkt[got]);
return gTrue;
}
/**
* Send a whole packet of data.
* Len is specified in the number of uint16_t's we want to send as our protocol only talks uint16_t's.
* Note that contents of the packet are modified to ensure it will cross the wire in the correct format.
* If the connection closes before we send all the data - the call returns gFalse.
*/
static gBool sendpkt(uint16_t *pkt, int len) {
int i;
// Convert each uint16_t to network order
for(i = 0; i < len; i++)
pkt[i] = htons(pkt[i]);
// Send it
len *= sizeof(uint16_t);
return send(netfd, (const char *)pkt, len, 0) == len;
}
#if GFX_USE_GINPUT && GINPUT_NEED_MOUSE
/**
* We use a separate thread to capture mouse events and send them down the pipe.
* We do the send in a single transaction to prevent it getting interspersed with
* any reply we need to send on the main thread.
*/
static DECLARE_THREAD_STACK(waNetThread, 512);
static DECLARE_THREAD_FUNCTION(NetThread, param) {
GEventMouse *pem;
uint16_t cmd[2];
uint16_t lbuttons;
gCoord lx, ly;
(void) param;
// Initialize the mouse and the listener.
geventListenerInit(&gl);
geventAttachSource(&gl, ginputGetMouse(0), GLISTEN_MOUSEDOWNMOVES|GLISTEN_MOUSEMETA);
lbuttons = 0;
lx = ly = -1;
while(1) {
// Get a (mouse) event
pem = (GEventMouse *)geventEventWait(&gl, gDelayForever);
if (pem->type != GEVENT_MOUSE && pem->type != GEVENT_TOUCH)
continue;
// Nothing to do if the socket is not open
if (netfd == (SOCKET)-1)
continue;
// Nothing to do if the mouse data has not changed
if (lx == pem->x && ly == pem->y && lbuttons == pem->buttons)
continue;
// Transfer mouse data that has changed
if (lx != pem->x) {
lx = pem->x;
cmd[0] = GNETCODE_MOUSE_X;
cmd[1] = lx;
sendpkt(cmd, 2);
}
if (ly != pem->y) {
ly = pem->y;
cmd[0] = GNETCODE_MOUSE_Y;
cmd[1] = ly;
sendpkt(cmd, 2);
}
// We always send the buttons as it also acts as a mouse sync signal
lbuttons = pem->buttons;
cmd[0] = GNETCODE_MOUSE_B;
cmd[1] = lbuttons;
sendpkt(cmd, 2);
}
return 0;
}
#endif
/**
* Do the connection to the remote host.
* We have two prototypes here - one for embedded systems and one for systems with a command line.
* We have two methods of using the sockets library - one very old style and the other the more modern approach.
*/
static SOCKET_TYPE doConnect(proto_args) {
SOCKET_TYPE fd;
#if !EMBEDED_OS
(void) argc;
// Parse the command line arguments
xhost = 0;
xport = 0;
while (*++argv) {
if (!xhost)
xhost = argv[0];
else if (!xport) {
xport = argv[0];
#if OLD_STYLE_SOCKETS
if (sscanf(xport, "%i", &xportnum) != 1 || xportnum >= 65536 || xportnum <= 0) {
fprintf(stderr, "Error: Bad port specification '%s'\n\n", xport);
goto usage;
}
#endif
} else {
fprintf(stderr, "Error: Unknown argument '%s'\n\n", argv[0]);
goto usage;
}
}
// Check the command line arguments were valid.
if (!xport)
xport = STRINGOF(GDISP_GFXNET_PORT);
if (!xhost) {
usage:
fprintf(stderr, "Usage: uGFXnetDisplay host [port]\n");
exit(1);
}
#endif
#if OLD_STYLE_SOCKETS
struct sockaddr_in serv_addr;
struct hostent * h;
h = gethostbyname(xhost);
if (!h)
// Error: Unable to find an ip-address for the specified server
return (SOCKET_TYPE)-1;
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_port = htons(xportnum);
serv_addr.sin_family = h->h_addrtype;
memcpy(&serv_addr.sin_addr, h->h_addr_list[0], h->h_length);
if ((fd = socket(serv_addr.sin_family, SOCK_STREAM, 0)) == (SOCKET_TYPE)-1)
// Error: Socket failed
return (SOCKET_TYPE)-1;
if (connect(fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) == -1) {
// Error: Could not connect to the specified server
closesocket(fd);
fd = (SOCKET_TYPE)-1;
}
#else
struct addrinfo hints, *servinfo, *p;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
fd = (SOCKET_TYPE)-1;
if (getaddrinfo(xhost, xport, &hints, &servinfo) != 0)
// Error: Unable to find an ip-address for the specified server
return (SOCKET_TYPE)-1;
for(p = servinfo; p; p = p->ai_next) {
if ((fd = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == (SOCKET_TYPE)-1)
continue;
if (connect(fd, p->ai_addr, p->ai_addrlen) == -1) {
closesocket(fd);
fd = (SOCKET_TYPE)-1;
continue;
}
break;
}
freeaddrinfo(servinfo);
#endif
return fd;
}
/**
* Our main function.
* There are two prototypes - one for systems with a command line and one for embedded systems without one.
*/
int main(proto_args) {
uint16_t cmd[5];
unsigned cnt;
// Initialize and clear the display
gfxInit();
font = gdispOpenFont("UI2");
// Open the connection
gdispDrawStringBox(0, 0, gdispGetWidth(), gdispGetHeight(), "Connecting to host...", font, GFX_WHITE, gJustifyCenter);
StartSockets();
netfd = doConnect(cmd_args);
if (netfd == (SOCKET_TYPE)-1)
gfxHalt("Could not connect to the specified server");
gdispClear(GFX_BLACK);
// Get the initial packet from the host
if (!getpkt(cmd, 2)) goto alldone;
if (cmd[0] != GNETCODE_INIT || cmd[1] != GNETCODE_VERSION)
gfxHalt("Oops - The protocol doesn't look like one we understand");
// Get the rest of the initial arguments
if (!getpkt(cmd, 4)) goto alldone; // cmd[] = width, height, pixelformat, hasmouse
// We will ignore size mismatches but the pixel format must match
if (cmd[2] != GDISP_PIXELFORMAT)
gfxHalt("Oops - The remote display is using a different pixel format to us.\nTry defining GDISP_PIXELFORMAT in your gfxconf.h file.");
#if GFX_USE_GINPUT && GINPUT_NEED_MOUSE
// Start the mouse thread if needed
if (cmd[3])
gfxThreadClose(gfxThreadCreate(waNetThread, sizeof(waNetThread), gThreadpriorityHigh, NetThread, 0));
#endif
// Process incoming instructions
while(getpkt(cmd, 1)) {
switch(cmd[0]) {
case GNETCODE_FLUSH:
gdispFlush();
break;
case GNETCODE_PIXEL:
if (!getpkt(cmd, 3)) goto alldone; // cmd[] = x, y, color
gdispDrawPixel(cmd[0], cmd[1], cmd[2]);
break;
case GNETCODE_FILL:
if (!getpkt(cmd, 5)) goto alldone; // cmd[] = x, y, cx, cy, color
gdispFillArea(cmd[0], cmd[1], cmd[2], cmd[3], cmd[4]);
break;
case GNETCODE_BLIT:
if (!getpkt(cmd, 4)) goto alldone; // cmd[] = x, y, cx, cy - Followed by cx * cy pixels
gdispStreamStart(cmd[0],cmd[1],cmd[2],cmd[3]);
for(cnt = (unsigned)cmd[2] * cmd[3]; cnt; cnt--) {
if (!getpkt(cmd, 1)) goto alldone;
gdispStreamColor(cmd[0]);
}
gdispStreamStop();
break;
#if GDISP_NEED_PIXELREAD
case GNETCODE_READ:
if (!getpkt(cmd, 2)) goto alldone; // cmd[] = x, y - Response is GNETCODE_READ,color
cmd[1] = gdispGetPixelColor(cmd[0], cmd[1]);
cmd[0] = GNETCODE_READ;
if (!sendpkt(cmd, 2)) goto alldone;
break;
#endif
#if GDISP_NEED_SCROLL
case GNETCODE_SCROLL:
if (!getpkt(cmd, 5)) goto alldone; // cmd[] = x, y, cx, cy, lines
gdispVerticalScroll(cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], GFX_BLACK);
break;
#endif
case GNETCODE_CONTROL:
if (!getpkt(cmd, 2)) goto alldone; // cmd[] = what,data - Response is GNETCODE_CONTROL, 0x0000 (fail) or GNETCODE_CONTROL, 0x0001 (success)
gdispControl(cmd[0], (void *)(unsigned)cmd[1]);
switch(cmd[0]) {
case GDISP_CONTROL_ORIENTATION:
cmd[1] = (uint16_t)gdispGetOrientation() == cmd[1] ? 1 : 0;
break;
case GDISP_CONTROL_POWER:
cmd[1] = (uint16_t)gdispGetPowerMode() == cmd[1] ? 1 : 0;
break;
case GDISP_CONTROL_BACKLIGHT:
cmd[1] = (uint16_t)gdispGetBacklight() == cmd[1] ? 1 : 0;
break;
default:
cmd[1] = 0;
break;
}
cmd[0] = GNETCODE_CONTROL;
if (!sendpkt(cmd, 2)) goto alldone;
break;
default:
gfxHalt("Oops - The host has sent invalid commands");
break;
}
}
alldone:
closesocket(netfd);
gfxHalt("Connection closed");
return 0;
}