/*************************************************************************
* *
* Open Dynamics Engine, Copyright (C) 2001,2002 Russell L. Smith. *
* All rights reserved. Email: russ@q12.org Web: www.q12.org *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of EITHER: *
* (1) The GNU Lesser General Public License as published by the Free *
* Software Foundation; either version 2.1 of the License, or (at *
* your option) any later version. The text of the GNU Lesser *
* General Public License is included with this library in the *
* file LICENSE.TXT. *
* (2) The BSD-style license that is included with this library in *
* the file LICENSE-BSD.TXT. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files *
* LICENSE.TXT and LICENSE-BSD.TXT for more details. *
* *
*************************************************************************/
#if defined(WIN32) || defined(__CYGWIN__)// this prevents warnings when dependencies built
#include <windows.h>
#endif
#include <ode/config.h>
#include <GL/gl.h>
#include "resource.h"
#include "internal.h"
//***************************************************************************
// application globals
static HINSTANCE ghInstance = 0;
static int gnCmdShow = 0;
static HACCEL accelerators = 0;
static HWND main_window = 0;
//***************************************************************************
// error and message handling
static void errorBox (char *title, char *msg, va_list ap)
{
char s[1000];
vsprintf (s,msg,ap);
MessageBox (0,s,title,MB_OK | MB_APPLMODAL | MB_ICONEXCLAMATION);
}
static void dsWarning (char *msg, ...)
{
va_list ap;
va_start (ap,msg);
errorBox ("Warning",msg,ap);
}
extern "C" void dsError (char *msg, ...)
{
va_list ap;
va_start (ap,msg);
errorBox ("Error",msg,ap);
exit (1);
}
extern "C" void dsDebug (char *msg, ...)
{
va_list ap;
va_start (ap,msg);
errorBox ("INTERNAL ERROR",msg,ap);
// *((char *)0) = 0; ... commit SEGVicide ?
abort();
exit (1); // should never get here, but just in case...
}
extern "C" void dsPrint (char *msg, ...)
{
va_list ap;
va_start (ap,msg);
vprintf (msg,ap);
}
//***************************************************************************
// rendering thread
// globals used to communicate with rendering thread
static volatile int renderer_run = 1;
static volatile int renderer_pause = 0; // 0=run, 1=pause
static volatile int renderer_ss = 0; // single step command
static volatile int renderer_width = 1;
static volatile int renderer_height = 1;
static dsFunctions *renderer_fn = 0;
static volatile HDC renderer_dc = 0;
static volatile int keybuffer[16]; // fifo ring buffer for keypresses
static volatile int keybuffer_head = 0; // index of next key to put in (modified by GUI)
static volatile int keybuffer_tail = 0; // index of next key to take out (modified by renderer)
static void setupRendererGlobals()
{
renderer_run = 1;
renderer_pause = 0;
renderer_ss = 0;
renderer_width = 1;
renderer_height = 1;
renderer_fn = 0;
renderer_dc = 0;
keybuffer[16];
keybuffer_head = 0;
keybuffer_tail = 0;
}
static DWORD WINAPI renderingThread (LPVOID lpParam)
{
// create openGL context and make it current
HGLRC glc = wglCreateContext (renderer_dc);
if (glc==NULL) dsError ("could not create OpenGL context");
if (wglMakeCurrent (renderer_dc,glc) != TRUE)
dsError ("could not make OpenGL context current");
// test openGL capabilities
int maxtsize=0;
glGetIntegerv (GL_MAX_TEXTURE_SIZE,&maxtsize);
if (maxtsize < 128) dsWarning ("max texture size too small (%dx%d)",
maxtsize,maxtsize);
dsStartGraphics (renderer_width,renderer_height,renderer_fn);
if (renderer_fn->start) renderer_fn->start();
while (renderer_run) {
// need to make local copy of renderer_ss to help prevent races
int ss = renderer_ss;
dsDrawFrame (renderer_width,renderer_height,renderer_fn,
renderer_pause && !ss);
if (ss) renderer_ss = 0;
// read keys out of ring buffer and feed them to the command function
while (keybuffer_head != keybuffer_tail) {
if (renderer_fn->command) renderer_fn->command (keybuffer[keybuffer_tail]);
keybuffer_tail = (keybuffer_tail+1) & 15;
}
// swap buffers
SwapBuffers (renderer_dc);
}
if (renderer_fn->stop) renderer_fn->stop();
dsStopGraphics();
// delete openGL context
wglMakeCurrent (NULL,NULL);
wglDeleteContext (glc);
return 123; // magic value used to test for thread termination
}
//***************************************************************************
// window handling
// callback function for "about" dialog box
static LRESULT CALLBACK AboutDlgProc (HWND hDlg, UINT uMsg, WPARAM wParam,
LPARAM lParam)
{
switch (uMsg) {
case WM_INITDIALOG:
return TRUE;
case WM_COMMAND:
switch (wParam) {
case IDOK:
EndDialog (hDlg, TRUE);
return TRUE;
}
break;
}
return FALSE;
}
// callback function for the main window
static LRESULT CALLBACK mainWndProc (HWND hWnd, UINT msg, WPARAM wParam,
LPARAM lParam)
{
static int button=0,lastx=0,lasty=0;
int ctrl = wParam & MK_CONTROL;
switch (msg) {
case WM_LBUTTONDOWN:
case WM_MBUTTONDOWN:
case WM_RBUTTONDOWN:
if (msg==WM_LBUTTONDOWN) button |= 1;
else if (msg==WM_MBUTTONDOWN) button |= 2;
else button |= 4;
lastx = SHORT(LOWORD(lParam));
lasty = SHORT(HIWORD(lParam));
SetCapture (hWnd);
break;
case WM_LBUTTONUP:
case WM_MBUTTONUP:
case WM_RBUTTONUP:
if (msg==WM_LBUTTONUP) button &= ~1;
else if (msg==WM_MBUTTONUP) button &= ~2;
else button &= ~4;
if (button==0) ReleaseCapture();
break;
case WM_MOUSEMOVE: {
int x = SHORT(LOWORD(lParam));
int y = SHORT(HIWORD(lParam));
if (button) dsMotion (button,x-lastx,y-lasty);
lastx = x;
lasty = y;
break;
}
case WM_CHAR: {
if (wParam >= ' ' && wParam <= 126) {
int nexth = (keybuffer_head+1) & 15;
if (nexth != keybuffer_tail) {
keybuffer[keybuffer_head] = wParam;
keybuffer_head = nexth;
}
}
break;
}
case WM_SIZE:
// lParam will contain the size of the *client* area!
renderer_width = LOWORD(lParam);
renderer_height = HIWORD(lParam);
break;
case WM_COMMAND:
switch (wParam & 0xffff) {
case IDM_ABOUT:
DialogBox (ghInstance,MAKEINTRESOURCE(IDD_ABOUT),hWnd,
(DLGPROC) AboutDlgProc);
break;
case IDM_PAUSE: {
renderer_pause ^= 1;
CheckMenuItem (GetMenu(hWnd),IDM_PAUSE,
renderer_pause ? MF_CHECKED : MF_UNCHECKED);
if (renderer_pause) renderer_ss = 0;
break;
}
case IDM_SINGLE_STEP: {
renderer_ss = 1;
break;
}
case IDM_PERF_MONITOR: {
dsWarning ("Performance monitor not yet implemented.");
break;
}
case IDM_TEXTURES: {
static int tex = 1;
tex ^= 1;
CheckMenuItem (GetMenu(hWnd),IDM_TEXTURES,
tex ? MF_CHECKED : MF_UNCHECKED);
dsSetTextures (tex);
break;
}
case IDM_SHADOWS: {
static int shadows = 1;
shadows ^= 1;
CheckMenuItem (GetMenu(hWnd),IDM_SHADOWS,
shadows ? MF_CHECKED : MF_UNCHECKED);
dsSetShadows (shadows);
break;
}
case IDM_SAVE_SETTINGS: {
dsWarning ("\"Save Settings\" not yet implemented.");
break;
}
case IDM_EXIT:
PostQuitMessage (0);
break;
}
break;
case WM_CLOSE:
PostQuitMessage (0);
break;
default:
return (DefWindowProc (hWnd, msg, wParam, lParam));
}
return 0;
}
// this comes from an MSDN example. believe it or not, this is the recommended
// way to get the console window handle.
static HWND GetConsoleHwnd()
{
// the console window title to a "unique" value, then find the window
// that has this title.
char title[1024];
wsprintf (title,"DrawStuff:%d/%d",GetTickCount(),GetCurrentProcessId());
SetConsoleTitle (title);
Sleep(40); // ensure window title has been updated
return FindWindow (NULL,title);
}
static void drawStuffStartup()
{
static int startup_called = 0;
if (startup_called) return;
startup_called = 1;
ghInstance = GetModuleHandleA (NULL);
gnCmdShow = SW_SHOWNORMAL; // @@@ fix this later
// redirect standard I/O to a new console (except on cygwin)
#ifndef CYGWIN
FreeConsole();
if (AllocConsole()==0) dsError ("AllocConsole() failed");
if (freopen ("CONIN$","rt",stdin)==0) dsError ("could not open stdin");
if (freopen ("CONOUT$","wt",stdout)==0) dsError ("could not open stdout");
if (freopen ("CONOUT$","wt",stderr)==0) dsError ("could not open stderr");
BringWindowToTop (GetConsoleHwnd());
SetConsoleTitle ("DrawStuff Messages");
#endif
// register the window class
WNDCLASS wc;
wc.style = CS_OWNDC | CS_VREDRAW | CS_HREDRAW;
wc.lpfnWndProc = mainWndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = ghInstance;
wc.hIcon = LoadIcon (NULL,IDI_APPLICATION);
wc.hCursor = LoadCursor (NULL,IDC_ARROW);
wc.hbrBackground = (HBRUSH) (COLOR_WINDOW+1);
wc.lpszMenuName = MAKEINTRESOURCE(IDR_MENU1);
wc.lpszClassName = "SimAppClass";
if (RegisterClass (&wc)==0) dsError ("could not register window class");
// load accelerators
accelerators = LoadAccelerators (ghInstance,
MAKEINTRESOURCE(IDR_ACCELERATOR1));
if (accelerators==NULL) dsError ("could not load accelerators");
}
void dsPlatformSimLoop (int window_width, int window_height,
dsFunctions *fn, int initial_pause)
{
drawStuffStartup();
setupRendererGlobals();
renderer_pause = initial_pause;
// create window - but first get window size for desired size of client area.
// if this adjustment isn't made then the openGL area will be shifted into
// the nonclient area and determining the frame buffer coordinate from the
// client area coordinate will be hard.
RECT winrect;
winrect.left = 50;
winrect.top = 80;
winrect.right = winrect.left + window_width;
winrect.bottom = winrect.top + window_height;
DWORD style = WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
AdjustWindowRect (&winrect,style,1);
char title[100];
sprintf (title,"Simulation test environment v%d.%02d",
DS_VERSION >> 8,DS_VERSION & 0xff);
main_window = CreateWindow ("SimAppClass",title,style,
winrect.left,winrect.top,winrect.right-winrect.left,winrect.bottom-winrect.top,
NULL,NULL,ghInstance,NULL);
if (main_window==NULL) dsError ("could not create main window");
ShowWindow (main_window, gnCmdShow);
HDC dc = GetDC (main_window); // get DC for this window
if (dc==NULL) dsError ("could not get window DC");
// set pixel format for DC
PIXELFORMATDESCRIPTOR pfd = {
sizeof(PIXELFORMATDESCRIPTOR), // size of this pfd
1, // version number
PFD_DRAW_TO_WINDOW | // support window
PFD_SUPPORT_OPENGL | // support OpenGL
PFD_DOUBLEBUFFER, // double buffered
PFD_TYPE_RGBA, // RGBA type
24, // 24-bit color depth
0, 0, 0, 0, 0, 0, // color bits ignored
0, // no alpha buffer
0, // shift bit ignored
0, // no accumulation buffer
0, 0, 0, 0, // accum bits ignored
32, // 32-bit z-buffer
0, // no stencil buffer
0, // no auxiliary buffer
PFD_MAIN_PLANE, // main layer
0, // reserved
0, 0, 0 // layer masks ignored
};
// get the best available match of pixel format for the device context
int iPixelFormat = ChoosePixelFormat (dc,&pfd);
if (iPixelFormat==0)
dsError ("could not find a good OpenGL pixel format");
// set the pixel format of the device context
if (SetPixelFormat (dc,iPixelFormat,&pfd)==FALSE)
dsError ("could not set DC pixel format for OpenGL");
// **********
// start the rendering thread
// set renderer globals
renderer_dc = dc;
renderer_width = window_width;
renderer_height = window_height;
renderer_fn = fn;
DWORD threadId, thirdParam = 0;
HANDLE hThread;
hThread = CreateThread(
NULL, // no security attributes
0, // use default stack size
renderingThread, // thread function
&thirdParam, // argument to thread function
0, // use default creation flags
&threadId); // returns the thread identifier
if (hThread==NULL) dsError ("Could not create rendering thread");
// **********
// start GUI message processing
MSG msg;
while (GetMessage (&msg,main_window,0,0)) {
if (!TranslateAccelerator (main_window,accelerators,&msg)) {
TranslateMessage (&msg);
DispatchMessage (&msg);
}
}
// terminate rendering thread
renderer_run = 0;
DWORD ret = WaitForSingleObject (hThread,2000);
if (ret==WAIT_TIMEOUT) dsWarning ("Could not kill rendering thread (1)");
DWORD exitcode=0;
if (!(GetExitCodeThread (hThread,&exitcode) && exitcode == 123))
dsWarning ("Could not kill rendering thread (2)");
CloseHandle (hThread); // dont need thread handle anymore
// destroy window
DestroyWindow (main_window);
}
extern "C" void dsStop()
{
// just calling PostQuitMessage() here wont work, as this function is
// typically called from the rendering thread, not the GUI thread.
// instead we must post the message to the GUI window explicitly.
if (main_window) PostMessage (main_window,WM_QUIT,0,0);
}
//***************************************************************************
// windows entry point
//
// NOTE: WinMain is not guaranteed to be called with MinGW, because MinGW
// always calls main if it is defined and most users of this library will
// define their own main. So the startup functionality is kept in
// zDriverStartup(), which is also called when dsSimulationLoop() is called.
extern "C" int main (int argc, char **argv);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow)
{
drawStuffStartup();
return main (0,0); // @@@ should really pass cmd line arguments
}
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