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| #include <Windows.h>
RECT rcSize;
HDC hdcBackBuffer, hdcSprite;
HBITMAP hbmBackBuffer, hbmSprite;
int spriteX = 175, spriteY = 175;
LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
static PAINTSTRUCT ps;
switch (msg)
{
case WM_CREATE:
{
HDC hdcWindow = GetDC(hWnd);
// make back buffer
GetClientRect(hWnd, &rcSize);
hdcBackBuffer = CreateCompatibleDC(hdcWindow);
hbmBackBuffer = CreateCompatibleBitmap(hdcBackBuffer, rcSize.right - rcSize.left, rcSize.bottom - rcSize.top);
SelectObject(hdcBackBuffer, hbmBackBuffer); // SHOULD SAVE PREVIOUS...
DeleteObject(hbmBackBuffer);
// make sprite
hdcSprite = CreateCompatibleDC(hdcWindow);
//hbmSprite = CreateCompatibleBitmap(hdcSprite, 50, 50);
hbmSprite = (HBITMAP)LoadImage(NULL, "image.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
SelectObject(hdcSprite, hbmSprite); // SHOULD SAVE PREVIOUS...
DeleteObject(hbmSprite);
//RECT rcSprite;
//SetRect(&rcSprite, 0, 0, 50, 50);
//FillRect(hdcSprite, &rcSprite, (HBRUSH)GetStockObject(WHITE_BRUSH));
ReleaseDC(hWnd, hdcWindow);
return 0;
}
case WM_KEYDOWN:
{
// SHOULD REALLY USE GetAsyncKeyState for game, but simplified here
switch (wParam)
{
case VK_LEFT:
spriteX--;
break;
case VK_RIGHT:
spriteX++;
break;
case VK_UP:
spriteY--;
break;
case VK_DOWN:
spriteY++;
break;
}
return 0;
}
case WM_ERASEBKGND:
{
return 1; // INDICATE THAT WE ERASED THE BACKGROUND OURSELVES
}
case WM_PAINT:
{
BeginPaint(hWnd, &ps);
// clear back buffer
FillRect(hdcBackBuffer, &rcSize, (HBRUSH)GetStockObject(BLACK_BRUSH));
// render sprite to back buffer
BitBlt(hdcBackBuffer, spriteX, spriteY, 50, 50, hdcSprite, 0, 0, SRCCOPY);
// render back buffer to screen
BitBlt(ps.hdc, 0, 0, rcSize.right - rcSize.left, rcSize.bottom - rcSize.top, hdcBackBuffer, 0, 0, SRCCOPY);
EndPaint(hWnd, &ps);
return 0;
}
case WM_DESTROY:
{
// TODO - DESTROY ALL BITMAPS AND DEVICE CONTEXTS
PostQuitMessage(0);
return 0;
}
default:
{
return DefWindowProc(hWnd, msg, wParam, lParam);
}
}
}
int WINAPI WinMain(HINSTANCE hPrevInstance, HINSTANCE hInstance, LPSTR lpCmdLine, int nShowCmd)
{
static TCHAR className[] = TEXT("GameClass");
static TCHAR windowName[] = TEXT("A Game");
WNDCLASSEX wcex;
wcex.cbClsExtra = 0;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.cbWndExtra = 0;
wcex.hbrBackground = NULL;
wcex.hCursor = LoadCursor(hInstance, IDC_ARROW);
wcex.hIcon = LoadIcon(hInstance, IDI_APPLICATION);
wcex.hIconSm = NULL;
wcex.hInstance = hInstance;
wcex.lpfnWndProc = WndProc;
wcex.lpszClassName = className;
wcex.lpszMenuName = NULL;
wcex.style = 0;
if (!RegisterClassEx(&wcex))
return 0;
HWND hWnd = CreateWindow(className, windowName, WS_CAPTION | WS_BORDER | WS_SYSMENU, 0, 0, 400, 400, NULL, NULL, hInstance, NULL);
if (!hWnd)
return 0;
ShowWindow(hWnd, nShowCmd);
UpdateWindow(hWnd);
MSG msg;
for (;;)
{
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
if (msg.message == WM_QUIT)
{
break;
}
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
InvalidateRect(hWnd, NULL, FALSE);
}
return msg.wParam;
} |
