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Frame limiter, force the game to draw even when inactive

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This commit is contained in:
Toni Spets 2010-10-25 18:51:39 +03:00
parent 7595f6d7e5
commit c196186614
3 changed files with 37 additions and 16 deletions
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35
main.c
View File

@ -143,6 +143,14 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch(uMsg)
{
case WM_NCACTIVATE:
/* game's drawing loop stops when it inactivates, so don't */
DefWindowProc(hWnd, uMsg, wParam, lParam);
if(wParam == FALSE)
{
mouse_unlock();
}
return 0;
case WM_KEYDOWN:
if(wParam == VK_CONTROL)
{
@ -171,7 +179,7 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
if(!ddraw->locked)
{
mouse_lock();
return DefWindowProc(hWnd, uMsg, wParam, lParam);
return 0;
}
break;
case WM_MOUSEMOVE:
@ -181,18 +189,12 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
ddraw->cursor.y = HIWORD(lParam);
}
break;
case WM_SETFOCUS:
return DefWindowProc(hWnd, uMsg, wParam, lParam);
case WM_KILLFOCUS:
mouse_unlock();
return DefWindowProc(hWnd, uMsg, wParam, lParam);
case WM_PAINT:
if(ddraw_primary)
{
SetEvent(ddraw_primary->flipEvent);
}
return DefWindowProc(hWnd, uMsg, wParam, lParam);
break;
case WM_MOVE:
ddraw->winpos.x = LOWORD(lParam);
ddraw->winpos.y = HIWORD(lParam);
@ -210,7 +212,6 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
SetEvent(ddraw_primary->flipEvent);
}
break;
case WM_WINDOWPOSCHANGED:
GetClientRect(ddraw->hWnd, &ddraw->cursorclip);
@ -255,6 +256,8 @@ HRESULT __stdcall ddraw_SetCooperativeLevel(IDirectDrawImpl *This, HWND hWnd, DW
HRESULT __stdcall ddraw_SetDisplayMode(IDirectDrawImpl *This, DWORD width, DWORD height, DWORD bpp)
{
DEVMODE mode;
printf("DirectDraw::SetDisplayMode(This=%p, width=%d, height=%d, bpp=%d)\n", This, (unsigned int)width, (unsigned int)height, (unsigned int)bpp);
/* currently we only support 8 bit modes */
@ -263,17 +266,27 @@ HRESULT __stdcall ddraw_SetDisplayMode(IDirectDrawImpl *This, DWORD width, DWORD
return DDERR_INVALIDMODE;
}
mode.dmSize = sizeof(DEVMODE);
mode.dmDriverExtra = 0;
if(EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &mode) == FALSE)
{
/* not expected */
return DDERR_UNSUPPORTED;
}
This->width = width;
This->height = height;
This->bpp = bpp;
This->freq = mode.dmDisplayFrequency;
mouse_unlock();
SetWindowLong(This->hWnd, GWL_STYLE, GetWindowLong(This->hWnd, GWL_STYLE) | WS_CAPTION | WS_BORDER | WS_SYSMENU /*| WS_MINIMIZEBOX*/);
/* center the window with correct dimensions */
int x = (GetSystemMetrics(SM_CXSCREEN) / 2) - (This->width / 2);
int y = (GetSystemMetrics(SM_CYSCREEN) / 2) - (This->height / 2);
int x = (mode.dmPelsWidth / 2) - (This->width / 2);
int y = (mode.dmPelsHeight / 2) - (This->height / 2);
RECT dst = { x, y, This->width+x, This->height+y };
AdjustWindowRect(&dst, GetWindowLong(This->hWnd, GWL_STYLE), FALSE);
MoveWindow(This->hWnd, dst.left, dst.top, (dst.right - dst.left), (dst.bottom - dst.top), TRUE);

1
main.h
View File

@ -36,6 +36,7 @@ typedef struct IDirectDrawImpl
DWORD width;
DWORD height;
DWORD bpp;
DWORD freq;
HWND hWnd;
LRESULT CALLBACK (*WndProc)(HWND, UINT, WPARAM, LPARAM);

17
surface.c
View File

@ -544,13 +544,15 @@ DWORD WINAPI dd_Thread(IDirectDrawSurfaceImpl *This)
IDirectDrawSurface_SetClipper(primary, clipper);
This->flipEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
WaitForSingleObject(This->flipEvent, INFINITE);
DWORD tick_start;
DWORD tick_end;
DWORD frame_len = 1000.0f / This->parent->freq;
while(This->dRun)
{
WaitForSingleObject(This->flipEvent, INFINITE);
if(!This->dRun)
break;
tick_start = GetTickCount();
if(IDirectDrawSurface_Lock(primary, NULL, &ddsd, DDLOCK_WRITEONLY|DDLOCK_WAIT, NULL) != DD_OK)
continue;
@ -566,7 +568,12 @@ DWORD WINAPI dd_Thread(IDirectDrawSurfaceImpl *This)
IDirectDrawSurface_Unlock(primary, NULL);
ResetEvent(This->flipEvent);
tick_end = GetTickCount();
if(tick_end - tick_start < frame_len)
{
Sleep( frame_len - (tick_end - tick_start) );
}
}
IDirectDrawClipper_Release(clipper);