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boinc/api/windows_opengl.C

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// Event loop and support functions for Windows versions
// of BOINC applications w/ graphics.
// Platform-independent code should NOT be here.
//
/* This Code Was Created By Jeff Molofee 2000.
* A HUGE thanks to fredric echols for cleaning up
* and optimizing this code, making it more flexible!
* If you've found this code useful, please let me know.
* Visit My Site At nehe.gamedev.net
* Adapted to BOINC by Eric Heien
*/
#include "boinc_win.h"
#include "diagnostics.h"
#include "boinc_api.h"
#include "graphics_api.h"
#include "app_ipc.h"
#include "util.h"
#include "win_util.h"
#define BOINC_WINDOW_CLASS_NAME "BOINC_app"
static HDC hDC = NULL;
static HGLRC hRC = NULL;
static HWND hWnd = NULL; // Holds Our Window Handle
static HINSTANCE hInstance; // Holds The Instance Of The Application
static RECT rect = {50, 50, 50+640, 50+480};
static int current_graphics_mode = MODE_HIDE_GRAPHICS;
static int acked_graphics_mode = -1;
static POINT mousePos;
static HDC myhDC;
BOOL win_loop_done;
static GRAPHICS_MSG graphics_msg;
static HWINSTA hOriginalWindowStation = NULL;
static HDESK hOriginalDesktop = NULL;
static HWINSTA hInteractiveWindowStation = NULL;
static HDESK hInteractiveDesktop = NULL;
static bool visible = true;
void KillWindow() {
wglMakeCurrent(NULL,NULL); // release GL rendering context
if (hRC) {
wglDeleteContext(hRC);
hRC=NULL;
}
if (hWnd && hDC) {
ReleaseDC(hWnd,hDC);
}
hDC = NULL;
if (hWnd) {
DestroyWindow(hWnd);
}
hWnd = NULL;
if (hOriginalWindowStation) {
SetProcessWindowStation(hOriginalWindowStation);
CloseWindowStation(hInteractiveWindowStation);
hInteractiveWindowStation = NULL;
}
if (hOriginalDesktop) {
SetThreadDesktop(hOriginalDesktop);
CloseDesktop(hInteractiveDesktop);
hInteractiveDesktop = NULL;
}
}
void SetupPixelFormat(HDC hDC) {
int nPixelFormat;
static PIXELFORMATDESCRIPTOR pfd = {
sizeof(PIXELFORMATDESCRIPTOR), // size of structure.
1, // always 1.
PFD_DRAW_TO_WINDOW | // support window
PFD_SUPPORT_OPENGL | // support OpenGl
PFD_DOUBLEBUFFER, // support double buffering
PFD_TYPE_RGBA, // support RGBA
32, // 32 bit color mode
0, 0, 0, 0, 0, 0, // ignore color bits
0, // no alpha buffer
0, // ignore shift bit
0, // no accumulation buffer
0, 0, 0, 0, // ignore accumulation bits.
16, // number of depth buffer bits.
0, // number of stencil buffer bits.
0, // 0 means no auxiliary buffer
PFD_MAIN_PLANE, // The main drawing plane
0, // this is reserved
0, 0, 0 }; // layer masks ignored.
// this chooses the best pixel format and returns index.
nPixelFormat = ChoosePixelFormat(hDC, &pfd);
// This set pixel format to device context.
SetPixelFormat(hDC, nPixelFormat, &pfd);
}
static void make_new_window() {
RECT WindowRect = {0,0,0,0};
int width, height;
DWORD dwExStyle;
DWORD dwStyle;
if (current_graphics_mode == MODE_FULLSCREEN) {
HDC screenDC=GetDC(NULL);
WindowRect.left = WindowRect.top = 0;
WindowRect.right=GetDeviceCaps(screenDC, HORZRES);
WindowRect.bottom=GetDeviceCaps(screenDC, VERTRES);
ReleaseDC(NULL, screenDC);
dwExStyle=WS_EX_TOPMOST;
dwStyle=WS_POPUP;
while(ShowCursor(false) >= 0);
} else {
WindowRect = rect;
dwExStyle=WS_EX_APPWINDOW|WS_EX_WINDOWEDGE;
dwStyle=WS_OVERLAPPEDWINDOW;
while(ShowCursor(true) < 0);
}
APP_INIT_DATA aid;
boinc_get_init_data(aid);
if (!strlen(aid.app_name)) strcpy(aid.app_name, "BOINC Application");
hWnd = CreateWindowEx(dwExStyle, BOINC_WINDOW_CLASS_NAME, aid.app_name,
dwStyle|WS_CLIPSIBLINGS|WS_CLIPCHILDREN, WindowRect.left, WindowRect.top,
WindowRect.right-WindowRect.left,WindowRect.bottom-WindowRect.top,
NULL, NULL, hInstance, NULL
);
SetForegroundWindow(hWnd);
GetCursorPos(&mousePos);
hDC = GetDC(hWnd);
myhDC=hDC;
SetupPixelFormat(myhDC);
if(!(hRC = wglCreateContext(hDC))) {
ReleaseDC(hWnd, hDC);
return;
}
if(!wglMakeCurrent(hDC, hRC)) {
ReleaseDC(hWnd, hDC);
wglDeleteContext(hRC);
return;
}
width = WindowRect.right-WindowRect.left;
height = WindowRect.bottom-WindowRect.top;
ShowWindow(hWnd, SW_SHOW);
SetFocus(hWnd);
app_graphics_init();
}
// switch to the given graphics mode. This is called:
// - on initialization
// - when get mode change msg (via shared mem)
// - when in SS mode and get user input
//
static void set_mode(int mode) {
int new_mode = mode;
if (mode == current_graphics_mode) return;
if (current_graphics_mode != MODE_FULLSCREEN) GetWindowRect(hWnd, &rect);
KillWindow();
if (!boinc_is_standalone() &&
strlen(graphics_msg.window_station) > 0 &&
strlen(graphics_msg.desktop) > 0)
{
GetDesktopWindow();
if (NULL == hOriginalWindowStation) {
hOriginalWindowStation = GetProcessWindowStation();
if (NULL == hOriginalWindowStation) {
BOINCTRACE(_T("Failed to retrieve the orginal window station\n"));
}
}
if (NULL == hOriginalDesktop) {
hOriginalDesktop = GetThreadDesktop(GetCurrentThreadId());
if (NULL == hOriginalDesktop) {
BOINCTRACE(_T("Failed to retrieve the orginal desktop\n"));
}
}
hInteractiveWindowStation = OpenWindowStation( graphics_msg.window_station, FALSE, GENERIC_READ );
if (NULL == hInteractiveWindowStation) {
BOINCTRACE(_T("Failed to retrieve the required window station\n"));
new_mode = MODE_UNSUPPORTED;
} else {
BOINCTRACE(_T("Retrieved the required window station\n"));
SetProcessWindowStation(hInteractiveWindowStation);
hInteractiveDesktop = OpenDesktop( graphics_msg.desktop, NULL, FALSE, GENERIC_READ | DESKTOP_CREATEWINDOW | DESKTOP_CREATEMENU );
if (NULL == hInteractiveDesktop) {
BOINCTRACE(_T("Failed to retrieve the required desktop\n"));
new_mode = MODE_UNSUPPORTED;
} else {
BOINCTRACE(_T("Retrieved the required desktop\n"));
SetThreadDesktop(hInteractiveDesktop);
}
}
}
current_graphics_mode = new_mode;
if (new_mode != MODE_HIDE_GRAPHICS && new_mode != MODE_QUIT && new_mode != MODE_UNSUPPORTED) {
make_new_window();
}
}
void parse_mouse_event(UINT uMsg, int& which, bool& down) {
switch(uMsg) {
case WM_LBUTTONDOWN: which = 0; down = true; break;
case WM_MBUTTONDOWN: which = 1; down = true; break;
case WM_RBUTTONDOWN: which = 2; down = true; break;
case WM_LBUTTONUP: which = 0; down = false; break;
case WM_MBUTTONUP: which = 1; down = false; break;
case WM_RBUTTONUP: which = 2; down = false; break;
}
}
// message handler (includes timer, Windows msgs)
//
LRESULT CALLBACK WndProc(
HWND hWnd, // Handle For This Window
UINT uMsg, // Message For This Window
WPARAM wParam, // Additional Message Information
LPARAM lParam // Additional Message Information
) {
switch(uMsg) {
case WM_ERASEBKGND: // Check To See If Windows Is Trying To Erase The Background
return 0;
case WM_KEYDOWN:
case WM_KEYUP:
if (current_graphics_mode == MODE_FULLSCREEN) {
set_mode(MODE_QUIT);
} else {
if (uMsg == WM_KEYDOWN) {
boinc_app_key_press((int)wParam, (int)lParam);
} else {
boinc_app_key_release((int)wParam, (int)lParam);
}
}
return 0;
case WM_LBUTTONDOWN:
case WM_MBUTTONDOWN:
case WM_RBUTTONDOWN:
case WM_LBUTTONUP:
case WM_MBUTTONUP:
case WM_RBUTTONUP:
if (current_graphics_mode == MODE_FULLSCREEN) {
set_mode(MODE_QUIT);
} else {
int which;
bool down;
POINT cPos;
GetCursorPos(&cPos);
parse_mouse_event(uMsg, which, down);
boinc_app_mouse_button(cPos.x, cPos.y, which, down);
}
return 0;
case WM_MOUSEMOVE:
POINT cPos;
GetCursorPos(&cPos);
if(current_graphics_mode == MODE_FULLSCREEN) {
if(cPos.x != mousePos.x || cPos.y != mousePos.y) {
set_mode(MODE_QUIT);
}
} else {
boinc_app_mouse_move(
cPos.x, cPos.y,
(wParam&MK_LBUTTON)!=0,
(wParam&MK_MBUTTON)!=0,
(wParam&MK_RBUTTON)!=0
);
}
return 0;
case WM_CLOSE:
if (boinc_is_standalone()) {
exit(0);
} else {
set_mode(MODE_HIDE_GRAPHICS);
return 0;
}
case WM_PAINT:
PAINTSTRUCT ps;
RECT winRect;
HDC pdc;
pdc = BeginPaint(hWnd, &ps);
GetClientRect(hWnd, &winRect);
FillRect(pdc, &winRect, (HBRUSH)GetStockObject(BLACK_BRUSH));
EndPaint(hWnd, &ps);
return 0;
case WM_SIZE:
if ( SIZE_MINIMIZED == wParam ) {
visible = FALSE;
} else {
visible = TRUE;
}
app_graphics_resize(LOWORD(lParam), HIWORD(lParam));
return 0;
}
// Pass All Unhandled Messages To DefWindowProc
return DefWindowProc(hWnd,uMsg,wParam,lParam);
}
BOOL reg_win_class() {
WNDCLASS wc; // Windows Class Structure
hInstance = GetModuleHandle(NULL); // Grab An Instance For Our Window
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; // Redraw On Size, And Own DC For Window.
wc.lpfnWndProc = (WNDPROC) WndProc; // WndProc Handles Messages
wc.cbClsExtra = 0; // No Extra Window Data
wc.cbWndExtra = 0; // No Extra Window Data
wc.hInstance = hInstance; // Set The Instance
wc.hIcon = LoadIcon(NULL, IDI_WINLOGO); // Load The Default Icon
wc.hCursor = LoadCursor(NULL, IDC_ARROW); // Load The Arrow Pointer
wc.hbrBackground = NULL; // No Background Required For GL
wc.lpszMenuName = NULL; // We Don't Want A Menu
wc.lpszClassName = BOINC_WINDOW_CLASS_NAME; // Set The Class Name
if (!RegisterClass(&wc)) // Attempt To Register The Window Class
{
MessageBox(NULL,"Failed To Register The Window Class.","ERROR",MB_OK|MB_ICONEXCLAMATION);
return FALSE; // Return FALSE
}
return TRUE;
}
BOOL unreg_win_class() {
if (!UnregisterClass(BOINC_WINDOW_CLASS_NAME,hInstance)) {
MessageBox(NULL,"Could Not Unregister Class.","SHUTDOWN ERROR",MB_OK | MB_ICONINFORMATION);
hInstance=NULL; // Set hInstance To NULL
}
return TRUE;
}
static VOID CALLBACK timer_handler(HWND, UINT, UINT, DWORD) {
RECT rt;
int width, height;
char buf[MSG_CHANNEL_SIZE];
// check for graphics-related message from core client
//
if (app_client_shm) {
if (app_client_shm->shm->graphics_request.get_msg(buf)) {
//fprintf(stderr, "%d got graphics request: %s\n", time(0), buf); fflush(stderr);
app_client_shm->decode_graphics_msg(buf, graphics_msg);
switch (graphics_msg.mode) {
case MODE_REREAD_PREFS:
// only reread graphics prefs if we have a window open
//
switch(current_graphics_mode) {
case MODE_WINDOW:
case MODE_FULLSCREEN:
app_graphics_reread_prefs();
break;
}
break;
case MODE_HIDE_GRAPHICS:
case MODE_WINDOW:
case MODE_FULLSCREEN:
case MODE_BLANKSCREEN:
set_mode(graphics_msg.mode);
break;
}
}
// ack graphics mode
//
if (acked_graphics_mode != current_graphics_mode) {
bool sent = app_client_shm->shm->graphics_reply.send_msg(
xml_graphics_modes[current_graphics_mode]
);
if (sent) acked_graphics_mode = current_graphics_mode;
if (MODE_QUIT == current_graphics_mode) {
current_graphics_mode = MODE_HIDE_GRAPHICS;
}
}
}
if (!visible) return;
if (current_graphics_mode == MODE_HIDE_GRAPHICS) return;
if (!hWnd) return;
// TODO: remove width, height from API
//
GetClientRect(hWnd, &rt);
width = rt.right-rt.left;
height = rt.bottom-rt.top;
if (throttled_app_render(width, height, dtime())) {
SwapBuffers(hDC);
}
}
void win_graphics_event_loop() {
MSG msg; // Windows Message Structure
// Register window class and graphics mode message
reg_win_class();
SetTimer(NULL, 1, 30, &timer_handler);
if (boinc_is_standalone()) {
set_mode(MODE_WINDOW);
} else {
set_mode(MODE_HIDE_GRAPHICS);
}
win_loop_done = false;
while(!win_loop_done) {
if (GetMessage(&msg,NULL,0,0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
} else {
win_loop_done = true;
}
}
unreg_win_class();
SetEvent(hQuitEvent); // Signal the worker thread that we're quitting
}
#ifdef __GNUC__
static volatile const char __attribute__((unused)) *BOINCrcsid="$Id$";
#else
static volatile const char *BOINCrcsid="$Id$";
#endif
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