dfhack/plugins/dfstream.cpp

317 lines
9.0 KiB
C++

#include "Core.h"
#include "Console.h"
#include "Export.h"
#include "PluginManager.h"
#include "DataDefs.h"
#include "df/graphic.h"
#include "df/enabler.h"
#include "df/renderer.h"
#include <vector>
#include <string>
#include "PassiveSocket.h"
#include "tinythread.h"
using namespace DFHack;
using namespace df::enums;
using std::string;
using std::vector;
DFHACK_PLUGIN("dfstream");
REQUIRE_GLOBAL(gps);
REQUIRE_GLOBAL(enabler);
// Owns the thread that accepts TCP connections and forwards messages to clients;
// has a mutex
class client_pool {
typedef tthread::mutex mutex;
mutex clients_lock;
std::vector<CActiveSocket *> clients;
// TODO - delete this at some point
tthread::thread * accepter;
static void accept_clients(void * client_pool_pointer) {
client_pool * p = reinterpret_cast<client_pool *>(client_pool_pointer);
CPassiveSocket socket;
socket.Initialize();
if (socket.Listen((const uint8_t *)"0.0.0.0", 8008)) {
std::cout << "Listening on a socket" << std::endl;
} else {
std::cout << "Not listening: " << socket.GetSocketError() << std::endl;
std::cout << socket.DescribeError() << std::endl;
}
while (true) {
CActiveSocket * client = socket.Accept();
if (client != 0) {
lock l(*p);
p->clients.push_back(client);
}
}
}
public:
class lock {
tthread::lock_guard<mutex> l;
public:
lock(client_pool & p)
: l(p.clients_lock)
{
}
};
friend class client_pool::lock;
client_pool() {
accepter = new tthread::thread(accept_clients, this);
}
// MUST have lock
bool has_clients() {
return !clients.empty();
}
// MUST have lock
void add_client(CActiveSocket * sock) {
clients.push_back(sock);
}
// MUST have lock
void broadcast(const std::string & message) {
unsigned int sz = htonl(message.size());
for (size_t i = 0; i < clients.size(); ++i) {
clients[i]->Send(reinterpret_cast<const uint8_t *>(&sz), sizeof(sz));
clients[i]->Send((const uint8_t *) message.c_str(), message.size());
}
}
};
// A decorator (in the design pattern sense) of the DF renderer class.
// Sends the screen contents to a client_pool.
class renderer_decorator : public df::renderer {
// the renderer we're decorating
df::renderer * inner;
// how many frames have passed since we last sent a frame
int framesNotPrinted;
// set to false in the destructor
bool * alive;
// clients to which we send the frame
client_pool clients;
// The following three methods facilitate copying of state to the inner object
void set_to_null() {
screen = NULL;
screentexpos = NULL;
screentexpos_addcolor = NULL;
screentexpos_grayscale = NULL;
screentexpos_cf = NULL;
screentexpos_cbr = NULL;
screen_old = NULL;
screentexpos_old = NULL;
screentexpos_addcolor_old = NULL;
screentexpos_grayscale_old = NULL;
screentexpos_cf_old = NULL;
screentexpos_cbr_old = NULL;
}
void copy_from_inner() {
screen = inner->screen;
screentexpos = inner->screentexpos;
screentexpos_addcolor = inner->screentexpos_addcolor;
screentexpos_grayscale = inner->screentexpos_grayscale;
screentexpos_cf = inner->screentexpos_cf;
screentexpos_cbr = inner->screentexpos_cbr;
screen_old = inner->screen_old;
screentexpos_old = inner->screentexpos_old;
screentexpos_addcolor_old = inner->screentexpos_addcolor_old;
screentexpos_grayscale_old = inner->screentexpos_grayscale_old;
screentexpos_cf_old = inner->screentexpos_cf_old;
screentexpos_cbr_old = inner->screentexpos_cbr_old;
}
void copy_to_inner() {
inner->screen = screen;
inner->screentexpos = screentexpos;
inner->screentexpos_addcolor = screentexpos_addcolor;
inner->screentexpos_grayscale = screentexpos_grayscale;
inner->screentexpos_cf = screentexpos_cf;
inner->screentexpos_cbr = screentexpos_cbr;
inner->screen_old = screen_old;
inner->screentexpos_old = screentexpos_old;
inner->screentexpos_addcolor_old = screentexpos_addcolor_old;
inner->screentexpos_grayscale_old = screentexpos_grayscale_old;
inner->screentexpos_cf_old = screentexpos_cf_old;
inner->screentexpos_cbr_old = screentexpos_cbr_old;
}
public:
renderer_decorator(df::renderer * inner, bool * alive)
: inner(inner)
, framesNotPrinted(0)
, alive(alive)
{
copy_from_inner();
}
virtual void update_tile(int x, int y) {
copy_to_inner();
inner->update_tile(x, y);
}
virtual void update_all() {
copy_to_inner();
inner->update_all();
}
virtual void render() {
copy_to_inner();
inner->render();
++framesNotPrinted;
int gfps = enabler->calculated_gfps;
if (gfps == 0) gfps = 1;
// send a frame roughly every 128 mibiseconds (1 second = 1024 mibiseconds)
if ((framesNotPrinted * 1024) / gfps <= 128) return;
client_pool::lock lock(clients);
if (!clients.has_clients()) return;
framesNotPrinted = 0;
std::stringstream frame;
frame << gps->dimx << ' ' << gps->dimy << " 0 0 " << gps->dimx << ' ' << gps->dimy << '\n';
unsigned char * sc_ = gps->screen;
for (int y = 0; y < gps->dimy; ++y) {
unsigned char * sc = sc_;
for (int x = 0; x < gps->dimx; ++x) {
unsigned char ch = sc[0];
unsigned char bold = (sc[3] != 0) * 8;
unsigned char translate[] =
{ 0, 4, 2, 6, 1, 5, 3, 7, 8, 12, 10, 14, 9, 13, 11, 15 };
unsigned char fg = translate[(sc[1] + bold) % 16];
unsigned char bg = translate[sc[2] % 16]*16;
frame.put(ch);
frame.put(fg+bg);
sc += 4*gps->dimy;
}
sc_ += 4;
}
clients.broadcast(frame.str());
}
virtual void set_fullscreen() { inner->set_fullscreen(); }
virtual void zoom(df::zoom_commands cmd) {
copy_to_inner();
inner->zoom(cmd);
}
virtual void resize(int w, int h) {
copy_to_inner();
inner->resize(w, h);
copy_from_inner();
}
virtual void grid_resize(int w, int h) {
copy_to_inner();
inner->grid_resize(w, h);
copy_from_inner();
}
virtual ~renderer_decorator() {
*alive = false;
if (inner) {
copy_to_inner();
delete inner;
inner = 0;
}
set_to_null();
}
virtual bool get_mouse_coords(int *x, int *y) { return inner->get_mouse_coords(x, y); }
virtual bool uses_opengl() { return inner->uses_opengl(); }
static renderer_decorator * hook(df::renderer *& ptr, bool * alive) {
renderer_decorator * r = new renderer_decorator(ptr, alive);
ptr = r;
return r;
}
static void unhook(df::renderer *& ptr, renderer_decorator * dec, color_ostream & out) {
dec->copy_to_inner();
ptr = dec->inner;
dec->inner = 0;
delete dec;
}
};
inline df::renderer *& active_renderer() {
return enabler->renderer;
}
// This class is a smart pointer around a renderer_decorator.
// It should only be assigned r_d pointers that use the alive-pointer of this
// instance.
// If the r_d has been deleted by an external force, this smart pointer doesn't
// redelete it.
class auto_renderer_decorator {
renderer_decorator * p;
public:
// pass this member to the ctor of renderer_decorator
bool alive;
auto_renderer_decorator()
: p(0)
{
}
~auto_renderer_decorator() {
reset();
}
void reset() {
if (*this) {
delete p;
p = 0;
}
}
operator bool() {
return (p != 0) && alive;
}
auto_renderer_decorator & operator=(renderer_decorator *p) {
reset();
this->p = p;
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return *this;
}
renderer_decorator * get() {
return p;
}
renderer_decorator * operator->() {
return get();
}
};
auto_renderer_decorator decorator;
DFhackCExport command_result plugin_init ( color_ostream &out, vector <PluginCommand> &commands)
{
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if (!df::renderer::_identity.can_instantiate())
{
out.printerr("Cannot allocate a renderer\n");
return CR_OK;
}
if (!decorator) {
decorator = renderer_decorator::hook(active_renderer(), &decorator.alive);
}
return CR_OK;
}
DFhackCExport command_result plugin_shutdown ( color_ostream &out )
{
if (decorator && active_renderer() == decorator.get())
{
renderer_decorator::unhook(active_renderer(), decorator.get(), out);
}
decorator.reset();
return CR_OK;
}
// vim:set sw=4 sts=4 et: