windows graphics

svn path=/trunk/boinc/; revision=529

api/boinc_api.C

@@ -30,6 +30,7 @@
 #include <sys/stat.h>
 #include <afxwin.h>
 #include <winuser.h>
+#include <mmsystem.h>	// for timing
 #endif
 
 #ifdef __APPLE_CC__
@@ -55,12 +56,18 @@
 
 static APP_INIT_DATA aid;
 GRAPHICS_INFO gi;
-static double timer_period = 0.1;
+static double timer_period = 1.0/50.0;	// 50 Hz timer
 static double time_until_checkpoint;
+static double time_until_redraw;
 static double time_until_fraction_done_update;
 static double fraction_done;
 static bool ready_to_checkpoint = false;
+static bool ready_to_redraw = false;
 static bool this_process_active;
+int ok_to_draw = 0;
+#ifdef _WIN32
+HANDLE hGlobalDrawEvent;
+#endif
 
 // read the INIT_DATA and FD_INIT files
 //
@@ -120,6 +127,7 @@ int boinc_init() {
 #endif
     time_until_checkpoint = aid.checkpoint_period;
     time_until_fraction_done_update = aid.fraction_done_update_period;
+	time_until_redraw = gi.refresh_period;
     this_process_active = true;
     set_timer(timer_period);
 
@@ -161,6 +169,17 @@ int boinc_resolve_filename(char *virtual_name, char *physical_name, int len) {
 
 
 bool boinc_time_to_checkpoint() {
+	// Tell the graphics thread it's OK to draw now
+	if (ready_to_redraw) {
+		ok_to_draw = 1;
+		// And wait for the graphics thread to notify us that it's done drawing
+		ResetEvent(hGlobalDrawEvent);
+		WaitForSingleObject( hGlobalDrawEvent, INFINITE );
+		// Reset the refresh counter
+		time_until_redraw = gi.refresh_period;
+		ready_to_redraw = false;
+	}
+
     return ready_to_checkpoint;
 }
 
@@ -248,7 +267,7 @@ double boinc_cpu_time() {
 }
 
 #ifdef _WIN32
-void CALLBACK on_timer(HWND hwnd, UINT uMsg, UINT idEvent, DWORD dwTime) {
+void CALLBACK on_timer(UINT uTimerID, UINT uMsg, DWORD dwUser, DWORD dw1, DWORD dw2) {
 #else
 void on_timer(int a) {
 #endif
@@ -260,6 +279,13 @@ void on_timer(int a) {
         }
     }
 
+    if (!ready_to_redraw) {
+        time_until_redraw -= timer_period;
+        if (time_until_redraw <= 0) {
+            ready_to_redraw = true;
+        }
+    }
+
     if (this_process_active) {
         time_until_fraction_done_update -= timer_period;
         if (time_until_fraction_done_update < 0) {
@@ -275,7 +301,23 @@ void on_timer(int a) {
 int set_timer(double period) {
     int retval=0;
 #ifdef _WIN32
-    retval = SetTimer(NULL, 0, (int)(period*1000), on_timer);
+	// Use Windows multimedia timer, since it is more accurate
+	// than SetTimer and doesn't require an associated event loop
+	retval = timeSetEvent(
+		(int)(period*1000), // uDelay
+		(int)(period*1000), // uResolution
+		on_timer, // lpTimeProc
+		NULL, // dwUser
+		TIME_PERIODIC  // fuEvent
+		);
+
+	// Create the event object used to signal between the
+	// worker and event threads
+	hGlobalDrawEvent = CreateEvent( 
+            NULL,     // no security attributes
+            TRUE,    // manual reset event
+            TRUE,     // initial state is signaled
+            NULL);    // object not named
 #endif
 
 #if HAVE_SIGNAL_H

api/windows_opengl.cpp

@@ -1,3 +1,22 @@
+// The contents of this file are subject to the Mozilla Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License. You may obtain a copy of the License at
+// http://www.mozilla.org/MPL/ 
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
+// License for the specific language governing rights and limitations
+// under the License. 
+// 
+// The Original Code is the Berkeley Open Infrastructure for Network Computing. 
+// 
+// The Initial Developer of the Original Code is the SETI@home project.
+// Portions created by the SETI@home project are Copyright (C) 2002
+// University of California at Berkeley. All Rights Reserved. 
+// 
+// Contributor(s):
+//
+
 /*
  *		This Code Was Created By Jeff Molofee 2000
  *		A HUGE Thanks To Fredric Echols For Cleaning Up
@@ -12,7 +31,6 @@
 #include <gl\glu.h>			// Header File For The GLu32 Library
 #include <gl\glaux.h>		// Header File For The Glaux Library
 #include <stdio.h>
-#include <time.h>
 
 #include "graphics_api.h"
 
@@ -22,6 +40,7 @@ HWND		hWnd=NULL;		// Holds Our Window Handle
 HINSTANCE	hInstance;		// Holds The Instance Of The Application
 int			mouse_thresh = 3;
 int			initCursorPosx, initCursorPosy;
+extern int ok_to_draw;
 
 GLuint	base;				// Base Display List For The Font Set
 GLfloat	cnt1;				// 1st Counter Used To Move Text & For Coloring
@@ -30,8 +49,9 @@ GLfloat	cnt2;				// 2nd Counter Used To Move Text & For Coloring
 bool	keys[256];
 bool	active=TRUE;		// Window Active Flag Set To TRUE By Default
 bool	fullscreen=TRUE;	// Fullscreen Flag Set To Fullscreen Mode By Default
-BOOL	done=FALSE;								// Bool Variable To Exit Loop
+BOOL	done=FALSE;			// Bool Variable To Exit Loop
 int		counter;
+extern HANDLE hGlobalDrawEvent;
 
 int DrawGLScene(GLvoid);
 LRESULT	CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);	// Declaration For WndProc
@@ -444,16 +464,12 @@ LRESULT CALLBACK WndProc(	HWND	hWnd,			// Handle For This Window
 
 DWORD WINAPI win_graphics_event_loop( LPVOID gi ) {
 	MSG		msg;									// Windows Message Structure
-	clock_t next_draw_time;
-
-	next_draw_time = clock();
 
 	fullscreen=FALSE;							// Windowed Mode
 
 	// Create Our OpenGL Window
 	if (!CreateGLWindow("BOINC Application Window",((GRAPHICS_INFO*)gi)->xsize,
-		((GRAPHICS_INFO*)gi)->ysize,1,fullscreen))
-	{
+		((GRAPHICS_INFO*)gi)->ysize,1,fullscreen)) {
 		return 0;									// Quit If Window Was Not Created
 	}
 
@@ -473,13 +489,15 @@ DWORD WINAPI win_graphics_event_loop( LPVOID gi ) {
 		{
 			if (active)								// Program Active?
 			{
-				if (keys[VK_ESCAPE]) {				// Was ESC Pressed?
-					done=TRUE;						// ESC Signalled A Quit
-				}
-				else if (clock()>next_draw_time) {	// Not Time To Quit, Update Screen
-					DrawGLScene();					// Draw The Scene
-					SwapBuffers(hDC);				// Swap Buffers (Double Buffering).  This is taking lots of CPU time
-					next_draw_time = clock()+(1000/60);
+				if (ok_to_draw) {	// Not Time To Quit, Update Screen
+					// Draw The Scene
+					DrawGLScene();
+					// Swap Buffers (Double Buffering).  This seems to take lots of CPU time
+					SwapBuffers(hDC);
+					// TODO: Do we need a mutex for ok_to_draw?
+					ok_to_draw = 0;
+					// Signal the worker thread that we're done drawing
+					SetEvent(hGlobalDrawEvent);
 				}
 			}