/**
* Create a CoreEngine. The default window settings are 60 FPS,
* windowed mode with dimensions 640x480. A CoreEngine instance is
* passive insofar as enforcing these settings - it is a
* placeholder for the information. It is the job of an
* intermediate os layer to query these settings and apply them,
* or update them with correct values if the default ones are
* incorrect.
*/
CoreEngine::CoreEngine(){
for (int i = 0; i < ENGINE_MAX_EVENT_TYPES; i += 1){
events[i].reserve(ENGINE_INIT_EVENTS_STACK);
}
// Window Properties
setWindowDimensions(640, 480);
setWindowFullscreen(0);
setClearBuffer(1);
setWindowFps(60);
// Initialize member pointers
camera = NULL;
view = NULL;
// Initialize Fps members
last_render_time = elapsed_time_in_milliseconds();
frame_count = 0;
}
void getGameScreenDimensions(HWND game, HWND overlay, screen_dimensions_t *dimensions)
{
RECT clientRect;
POINT clientTopLeft = { .x = 0, .y = 0 };
GetClientRect(game, &clientRect);
ClientToScreen(game, &clientTopLeft);
int newLeftX = (int)clientTopLeft.x;
int newTopY = (int)clientTopLeft.y;
int newWidth = (int)clientRect.right;
int newHeight = (int)clientRect.bottom;
int newXOffset = 0, newYOffset = 0;
// has the game window position and/or size changed since we last checked?
bool changedPosition, changedSize, enlarged;
changedPosition = (dimensions->leftX != newLeftX || dimensions->topY != newTopY);
changedSize = (dimensions->width != newWidth || dimensions->height != newHeight);
enlarged = (changedSize && (newWidth > dimensions->width || newHeight > dimensions->height));
if (!changedPosition && !changedSize) {
return;
}
dimensions->leftX = newLeftX;
dimensions->topY = newTopY;
dimensions->width = newWidth;
dimensions->height = newHeight;
double dblWidth = (double)newWidth;
double dblHeight = (double)newHeight;
dimensions->aspect = dblWidth / dblHeight;
switch (dimensions->aspectMode)
{
case AM_FIXED:
case AM_STRETCH:
dimensions->xScale = dblWidth / dimensions->basicWidthAsDouble;
dimensions->yScale = dblHeight / dimensions->basicHeightAsDouble;
dimensions->leftOffset = 0;
dimensions->topOffset = 0;
break;
case AM_PILLARBOX:
newXOffset = setScreenOffsetsPillarboxed(dimensions, dblWidth, dblHeight);
break;
case AM_LETTERBOX:
newYOffset = setScreenOffsetsLetterboxed(dimensions, dblWidth, dblHeight);
break;
case AM_WINDOW_FRAME:
if (dimensions->aspect < dimensions->basicAspect)
{
newYOffset = setScreenOffsetsLetterboxed(dimensions, dblWidth, dblHeight);
}
else
{
newXOffset = setScreenOffsetsPillarboxed(dimensions, dblWidth, dblHeight);
}
break;
default:
printf("Encountered invalid aspect mode.");
exit(EXIT_FAILURE);
}
if (!enlarged)
{
RECT fullscreenRect = { .right = (LONG)screenWidth, .bottom = (LONG)screenHeight };
IDirect3DDevice9_SetScissorRect(d3dDevice, &fullscreenRect);
IDirect3DDevice9_Clear(d3dDevice, 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_RGBA(0, 0, 0, 0), 1.0f, 0);
}
setWindowDimensions(dimensions, newXOffset, newYOffset);
MoveWindow(overlay,
newLeftX + newXOffset, newTopY + newYOffset,
(int)screenWidth, (int)screenHeight,
true);
}
