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open_toontown_panda3d/direct/src/plugin_standalone/panda3d.cxx

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// Filename: panda3d.cxx
// Created by: drose (03Jun09)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) Carnegie Mellon University. All rights reserved.
//
// All use of this software is subject to the terms of the revised BSD
// license. You should have received a copy of this license along
// with this source code in a file named "LICENSE."
//
////////////////////////////////////////////////////////////////////
// This program must link with Panda for HTTPClient support. This
// means it probably should be built with LINK_ALL_STATIC defined, so
// we won't have to deal with confusing .dll or .so files that might
// compete on the disk with the dynamically-loaded versions. There's
// no competition in memory address space, though, because
// p3d_plugin--the only file we dynamically link in--doesn't itself
// link with Panda.
#include "pandabase.h"
#ifdef _WIN32
#include <windows.h>
#else
#include <dlfcn.h>
#endif
#include "httpClient.h"
#include "httpChannel.h"
#include "ramfile.h"
#include "thread.h"
#include "pset.h"
#include "p3d_plugin.h"
#include "load_plugin.h"
#ifndef HAVE_GETOPT
#include "gnu_getopt.h"
#else
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#endif
typedef pset<P3D_instance *> Instances;
Instances _instances;
class URLGetterThread : public Thread {
public:
URLGetterThread(P3D_instance *instance,
int unique_id,
const URLSpec &url,
const string &post_data);
protected:
virtual void thread_main();
private:
P3D_instance *_instance;
int _unique_id;
URLSpec _url;
string _post_data;
};
URLGetterThread::
URLGetterThread(P3D_instance *instance,
int unique_id,
const URLSpec &url,
const string &post_data) :
Thread(url, "URLGetter"),
_instance(instance),
_unique_id(unique_id),
_url(url),
_post_data(post_data)
{
}
void URLGetterThread::
thread_main() {
HTTPClient *http = HTTPClient::get_global_ptr();
cerr << "Getting URL " << _url << "\n";
PT(HTTPChannel) channel = http->make_channel(false);
if (_post_data.empty()) {
channel->begin_get_document(_url);
} else {
channel->begin_post_form(_url, _post_data);
}
Ramfile rf;
channel->download_to_ram(&rf);
size_t bytes_sent = 0;
while (channel->run() || rf.get_data_size() != 0) {
if (rf.get_data_size() != 0) {
// Got some new data.
bool download_ok = P3D_instance_feed_url_stream
(_instance, _unique_id, P3D_RC_in_progress,
channel->get_status_code(),
channel->get_file_size(),
(const unsigned char *)rf.get_data().data(), rf.get_data_size());
bytes_sent += rf.get_data_size();
rf.clear();
if (!download_ok) {
// The plugin doesn't care any more. Interrupt the download.
cerr << "Download interrupted: " << _url
<< ", after " << bytes_sent << " of " << channel->get_file_size()
<< " bytes.\n";
return;
}
}
}
// All done.
P3D_result_code status = P3D_RC_done;
if (!channel->is_valid()) {
if (channel->get_status_code() != 0) {
status = P3D_RC_http_error;
} else {
status = P3D_RC_generic_error;
}
cerr << "Error getting URL " << _url << "\n";
} else {
cerr << "Done getting URL " << _url << ", got " << bytes_sent << " bytes\n";
}
P3D_instance_feed_url_stream
(_instance, _unique_id, status,
channel->get_status_code(),
bytes_sent, NULL, 0);
}
void
handle_request(P3D_request *request) {
bool handled = false;
switch (request->_request_type) {
case P3D_RT_stop:
cerr << "Got P3D_RT_stop\n";
P3D_instance_finish(request->_instance);
_instances.erase(request->_instance);
#ifdef _WIN32
// Post a silly message to spin the event loop.
PostMessage(NULL, WM_USER, 0, 0);
#endif
handled = true;
break;
case P3D_RT_get_url:
cerr << "Got P3D_RT_get_url\n";
{
PT(URLGetterThread) thread = new URLGetterThread
(request->_instance, request->_request._get_url._unique_id,
URLSpec(request->_request._get_url._url), "");
thread->start(TP_normal, false);
}
break;
case P3D_RT_post_url:
cerr << "Got P3D_RT_post_url\n";
{
PT(URLGetterThread) thread = new URLGetterThread
(request->_instance, request->_request._post_url._unique_id,
URLSpec(request->_request._post_url._url),
string(request->_request._post_url._post_data, request->_request._post_url._post_data_size));
thread->start(TP_normal, false);
}
break;
case P3D_RT_notify:
// Ignore notifications.
break;
default:
// Some request types are not handled.
cerr << "Unhandled request: " << request->_request_type << "\n";
break;
};
P3D_request_finish(request, handled);
}
#ifdef _WIN32
LONG WINAPI
window_proc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam) {
switch (msg) {
case WM_DESTROY:
PostQuitMessage(0);
break;
};
return DefWindowProc(hwnd, msg, wparam, lparam);
}
void
make_parent_window(P3D_window_handle &parent_window,
int win_width, int win_height) {
WNDCLASS wc;
HINSTANCE application = GetModuleHandle(NULL);
ZeroMemory(&wc, sizeof(WNDCLASS));
wc.lpfnWndProc = window_proc;
wc.hInstance = application;
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wc.lpszClassName = "panda3d";
if (!RegisterClass(&wc)) {
cerr << "Could not register window class!\n";
exit(1);
}
DWORD window_style =
WS_POPUP | WS_CLIPCHILDREN | WS_CLIPSIBLINGS |
WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX |
WS_SIZEBOX | WS_MAXIMIZEBOX;
HWND toplevel_window =
CreateWindow("panda3d", "Panda3D", window_style,
CW_USEDEFAULT, CW_USEDEFAULT, win_width, win_height,
NULL, NULL, application, 0);
if (!toplevel_window) {
cerr << "Could not create toplevel window!\n";
exit(1);
}
ShowWindow(toplevel_window, SW_SHOWNORMAL);
parent_window._hwnd = toplevel_window;
}
#endif // _WIN32
#ifdef __APPLE__
void
make_parent_window(P3D_window_handle &parent_window,
int win_width, int win_height) {
// TODO.
assert(false);
}
#endif // __APPLE__
P3D_instance *
create_instance(const string &arg, P3D_window_type window_type,
int win_x, int win_y, int win_width, int win_height,
P3D_window_handle parent_window,
const string &output_filename) {
P3D_token tokens[] = {
{ "output_filename", output_filename.c_str() },
{ "src", arg.c_str() },
};
int num_tokens = sizeof(tokens) / sizeof(P3D_token);
// If the supplied parameter name is a real file, pass it in on the
// parameter list. Otherwise, assume it's a URL and let the plugin
// download it.
Filename p3d_filename = Filename::from_os_specific(arg);
string os_p3d_filename;
if (p3d_filename.exists()) {
os_p3d_filename = p3d_filename.to_os_specific();
}
P3D_instance *inst = P3D_new_instance(NULL, NULL);
if (inst != NULL) {
P3D_instance_setup_window
(inst, window_type, win_x, win_y, win_width, win_height, parent_window);
P3D_instance_start(inst, os_p3d_filename.c_str(), tokens, num_tokens);
}
return inst;
}
void
usage() {
cerr
<< "\nUsage:\n"
<< " panda3d [opts] file.p3d [file_b.p3d file_c.p3d ...]\n\n"
<< "This program is used to execute a Panda3D application bundle stored\n"
<< "in a .p3d file. Normally you only run one p3d bundle at a time,\n"
<< "but it is possible to run multiple bundles simultaneously.\n\n"
<< "Options:\n\n"
<< " -p " << get_plugin_basename() << "\n"
<< " Specify the full path to the particular Panda plugin DLL to\n"
<< " run. Normally, this will be found by searching in the usual\n"
<< " places.\n\n"
<< " -l output.log\n"
<< " Specify the name of the file to receive the log output of the\n"
<< " plugin process(es). The default is to send this output to the\n"
<< " console.\n\n"
<< " -t [toplevel|embedded|fullscreen|hidden]\n"
<< " Specify the type of graphic window to create. If you specify "
<< " \"embedded\", a new window is created to be the parent.\n\n"
<< " -s width,height\n"
<< " Specify the size of the graphic window.\n\n"
<< " -o x,y\n"
<< " Specify the position (origin) of the graphic window on the\n"
<< " screen, or on the parent window.\n\n";
}
bool
parse_int_pair(char *arg, int &x, int &y) {
char *endptr;
x = strtol(arg, &endptr, 10);
if (*endptr == ',') {
y = strtol(endptr + 1, &endptr, 10);
if (*endptr == '\0') {
return true;
}
}
// Some parse error on the string.
return false;
}
int
main(int argc, char *argv[]) {
/*
int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int) {
char *targv[] = {
"panda3d",
"-tembedded",
"c:/cygwin/home/drose/ralph.p3d",
NULL,
};
char **argv = targv;
int argc = 3;
*/
extern char *optarg;
extern int optind;
const char *optstr = "p:l:t:s:o:h";
string p3d_plugin_filename;
string output_filename;
P3D_window_type window_type = P3D_WT_toplevel;
int win_x = 0, win_y = 0;
int win_width = 0, win_height = 0;
int flag = getopt(argc, argv, optstr);
while (flag != EOF) {
switch (flag) {
case 'p':
p3d_plugin_filename = optarg;
break;
case 'l':
output_filename = optarg;
break;
case 't':
if (strcmp(optarg, "toplevel") == 0) {
window_type = P3D_WT_toplevel;
} else if (strcmp(optarg, "embedded") == 0) {
window_type = P3D_WT_embedded;
} else if (strcmp(optarg, "fullscreen") == 0) {
window_type = P3D_WT_fullscreen;
} else if (strcmp(optarg, "hidden") == 0) {
window_type = P3D_WT_hidden;
} else {
cerr << "Invalid value for -t: " << optarg << "\n";
return 1;
}
break;
case 's':
if (!parse_int_pair(optarg, win_width, win_height)) {
cerr << "Invalid value for -s: " << optarg << "\n";
return 1;
}
break;
case 'o':
if (!parse_int_pair(optarg, win_x, win_y)) {
cerr << "Invalid value for -o: " << optarg << "\n";
return 1;
}
break;
case 'h':
case '?':
default:
usage();
return 1;
}
flag = getopt(argc, argv, optstr);
}
argc -= (optind-1);
argv += (optind-1);
if (argc < 2) {
usage();
return 1;
}
if (!load_plugin(p3d_plugin_filename)) {
cerr << "Unable to load Panda3D plugin.\n";
return 1;
}
int num_instances = argc - 1;
P3D_window_handle parent_window;
if (window_type == P3D_WT_embedded) {
// The user asked for an embedded window. Create a toplevel
// window to be its parent, of the requested size.
if (win_width == 0 && win_height == 0) {
win_width = 640;
win_height = 480;
}
make_parent_window(parent_window, win_width, win_height);
// Center the child window(s) within the parent window.
#ifdef _WIN32
RECT rect;
GetClientRect(parent_window._hwnd, &rect);
win_x = (int)(rect.right * 0.1);
win_y = (int)(rect.bottom * 0.1);
win_width = (int)(rect.right * 0.8);
win_height = (int)(rect.bottom * 0.8);
#endif
// Subdivide the window into num_x_spans * num_y_spans sub-windows.
int num_y_spans = int(sqrt((double)num_instances));
int num_x_spans = (num_instances + num_y_spans - 1) / num_y_spans;
int inst_width = win_width / num_x_spans;
int inst_height = win_height / num_y_spans;
for (int yi = 0; yi < num_y_spans; ++yi) {
for (int xi = 0; xi < num_x_spans; ++xi) {
int i = yi * num_x_spans + xi;
if (i >= num_instances) {
continue;
}
// Create instance i at window slot (xi, yi).
int inst_x = win_x + xi * inst_width;
int inst_y = win_y + yi * inst_height;
P3D_instance *inst = create_instance
(argv[i + 1], P3D_WT_embedded,
inst_x, inst_y, inst_width, inst_height, parent_window,
output_filename);
_instances.insert(inst);
}
}
} else {
// Not an embedded window. Create each window with the same parameters.
for (int i = 0; i < num_instances; ++i) {
P3D_instance *inst = create_instance
(argv[i + 1], window_type,
win_x, win_y, win_width, win_height, parent_window,
output_filename);
_instances.insert(inst);
}
}
#ifdef _WIN32
if (window_type == P3D_WT_embedded) {
// Wait for new messages from Windows, and new requests from the
// plugin.
MSG msg;
int retval;
retval = GetMessage(&msg, NULL, 0, 0);
while (retval != 0 && !_instances.empty()) {
if (retval == -1) {
cerr << "Error processing message queue.\n";
exit(1);
}
TranslateMessage(&msg);
DispatchMessage(&msg);
// Check for new requests from the Panda3D plugin.
P3D_instance *inst = P3D_check_request(false);
while (inst != (P3D_instance *)NULL) {
P3D_request *request = P3D_instance_get_request(inst);
if (request != (P3D_request *)NULL) {
handle_request(request);
}
inst = P3D_check_request(false);
}
while (!PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE)) {
// spin, so we don't starve the download threads.
// TODO: use a better mechanism here.
Thread::force_yield();
}
retval = GetMessage(&msg, NULL, 0, 0);
}
cerr << "WM_QUIT\n";
// WM_QUIT has been received. Terminate all instances, and fall
// through.
Instances::iterator ii;
for (ii = _instances.begin(); ii != _instances.end(); ++ii) {
P3D_instance_finish(*ii);
}
_instances.clear();
} else {
// Not an embedded window, so we don't have our own window to
// generate Windows events. Instead, just wait for requests.
while (!_instances.empty()) {
P3D_instance *inst = P3D_check_request(false);
if (inst != (P3D_instance *)NULL) {
P3D_request *request = P3D_instance_get_request(inst);
if (request != (P3D_request *)NULL) {
handle_request(request);
}
}
Thread::force_yield();
}
}
#endif
// Now wait while we process pending requests.
while (!_instances.empty()) {
P3D_instance *inst = P3D_check_request(false);
if (inst != (P3D_instance *)NULL) {
P3D_request *request = P3D_instance_get_request(inst);
if (request != (P3D_request *)NULL) {
handle_request(request);
}
}
Thread::force_yield();
}
// All instances have finished; we can exit.
return 0;
}
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