LRESULT CALLBACK MessageHandler(HWND window,
UINT message,
WPARAM wParam,
LPARAM lParam)
{
LRESULT result = 0;
switch (message)
{
case WM_CLOSE:
{
globalRunning = false;
}break;
case WM_DESTROY:
{
globalRunning = false;
}break;
case WM_PAINT:
{
PAINTSTRUCT paint;
HDC deviceContext = BeginPaint(window, &paint);
Dimension windowDim = getWindowDimension(window);
drawBufferToScreen(deviceContext, &buffer, windowDim.width, windowDim.height);
EndPaint(window, &paint);
}break;
default:
{
result = DefWindowProc(window, message, wParam, lParam);
}break;
}
return result;
}
int window_get_height() { return getWindowDimension(3); }
int window_get_width() { return getWindowDimension(2); }
int CALLBACK
WinMain(HINSTANCE instance,
HINSTANCE prevInstance,
LPSTR cmdLine,
int showCode)
{
WNDCLASS windowClass = {};
// makes the entire client rect part of the window redraw whenever
// moved horizontally or veritcally
windowClass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
windowClass.lpfnWndProc = MessageHandler;
windowClass.hInstance = instance;
windowClass.lpszClassName = L"Gradient Renderer";
if (RegisterClass(&windowClass))
{
HWND window = CreateWindowEx(
0,
windowClass.lpszClassName,
L"GradientRenderer",
WS_OVERLAPPEDWINDOW | WS_VISIBLE, //window with border and title. also shows up visible by default
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
0,
0,
instance,
0);
if (window)
{
HDC deviceContext = GetDC(window);
uint8 xOffset = 0;
uint8 yOffset = 0;
initBuffer(&buffer, 1280, 720);
globalRunning = true;
while (globalRunning)
{
MSG message;
while (PeekMessage(&message, 0, 0, 0, PM_REMOVE))
{
if (message.message == WM_QUIT)
{
globalRunning = false;
}
TranslateMessage(&message);
DispatchMessage(&message);
}
renderGradient(&buffer, 255, xOffset, yOffset);
xOffset++;
yOffset++;
Dimension windowDimension = getWindowDimension(window);
drawBufferToScreen(deviceContext, &buffer, windowDimension.width, windowDimension.height);
}
}
}
return 0;
}
int window_get_y() { return getWindowDimension(1); }
//Getters
int window_get_x() { return getWindowDimension(0); }
