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186 | #include <Windows.h>
#include <stdint.h>
#define internal static
#define local_persist static
#define global_variable static
typedef uint8_t uint8;
typedef uint32_t uint32;
global_variable bool Running;
global_variable int BitmapWidth;
global_variable int BitmapHeight;
global_variable WNDCLASS WindowClass;
global_variable BITMAPINFO BitmapInfo;
global_variable void *BitmapMemory;
internal void Win32ResizeDIBSection(int Width, int Height) {
if (BitmapMemory) {
VirtualFree(BitmapMemory, 0, MEM_RELEASE);
}
BitmapWidth = Width;
BitmapHeight = Height;
BitmapInfo.bmiHeader.biSize = sizeof(BitmapInfo.bmiHeader);
BitmapInfo.bmiHeader.biWidth = BitmapWidth;
BitmapInfo.bmiHeader.biHeight = -BitmapHeight;
BitmapInfo.bmiHeader.biPlanes = 1;
BitmapInfo.bmiHeader.biBitCount = 32;
BitmapInfo.bmiHeader.biCompression = BI_RGB;
int BytesPerPixel = 4;
int BitmapMemorySize = (BitmapWidth * BitmapHeight)*BytesPerPixel;
BitmapMemory = VirtualAlloc(0, BitmapMemorySize, MEM_COMMIT, PAGE_READWRITE);
int Pitch = Width * BytesPerPixel;
uint8 *Row = (uint8 *)BitmapMemory;
for (int Y = 0; Y < BitmapHeight; ++Y)
{
uint8 *Pixel = (uint8 *)Row;
for (int X = 0; X < BitmapWidth; ++X) {
*Pixel = 255;
++Pixel;
*Pixel = 0;
++Pixel;
*Pixel = 0;
++Pixel;
*Pixel = 0;
++Pixel;
}
Row += Pitch;
}
}
internal void Win32UpdateWindow(HDC DeviceContext, RECT *WindowRect, int X, int Y, int Width, int Height) {
int WindowWidth = WindowRect->right - WindowRect->left;
int WidowHeight = WindowRect->bottom - WindowRect->top;
//NOTE: Copies the buffer to the screen
StretchDIBits(DeviceContext,
X, Y, BitmapWidth, BitmapHeight,
X, Y, WindowWidth, WidowHeight,
BitmapMemory, &BitmapInfo, DIB_RGB_COLORS, SRCCOPY);
}
LRESULT CALLBACK Win32MainWindowCallback(HWND Window, UINT Message, WPARAM wParam, LPARAM lParam) {
LRESULT Result = 0;
switch (Message) {
case WM_SIZE:
{
RECT ClientRect;
GetClientRect(Window, &ClientRect);
int Width = ClientRect.right - ClientRect.left;
int Height = ClientRect.bottom - ClientRect.top;
Win32ResizeDIBSection(Width, Height);
break;
}
case WM_DESTROY:
{
Running = false;
break;
}
case WM_CLOSE:
{
Running = false;
break;
}
case WM_ACTIVATE:
{
break;
}
case WM_PAINT:
{
PAINTSTRUCT Paint;
HDC DeviceContext = BeginPaint(Window, &Paint);
int X = Paint.rcPaint.left;
int Y = Paint.rcPaint.top;
int Width = Paint.rcPaint.right - Paint.rcPaint.left;
int Height = Paint.rcPaint.bottom - Paint.rcPaint.top;
RECT ClientRect;
GetClientRect(Window, &ClientRect);
Win32UpdateWindow(DeviceContext, &ClientRect, X, Y, Width, Height);
EndPaint(Window, &Paint);
break;
}
default:
{
Result = DefWindowProc(Window, Message, wParam, lParam);
break;
}
}
return(Result);
}
int CALLBACK WinMain(HINSTANCE Instance, HINSTANCE PrevInstance, LPSTR CommandLine, int ShowCode) {
WindowClass.lpfnWndProc = Win32MainWindowCallback;
WindowClass.hInstance = Instance;
//WindowClass.hIcon = ;
WindowClass.lpszClassName = "HandmadeHeroWindowClass";
if (RegisterClassA(&WindowClass)) {
HWND WindowHandle = CreateWindowExA(
0,
WindowClass.lpszClassName,
"Handmade Hero",
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
0,
0,
Instance,
0);
if (WindowHandle) {
MSG Message;
Running = true;
while (Running);
{
BOOL MessageResult = GetMessage(&Message, 0, 0, 0);
if (MessageResult > 0)
{
TranslateMessage(&Message);
DispatchMessageA(&Message);
}
else
{
}
}
}
else
{
// TODO: LOGGING
}
}
else
{
// TODO: LOGGING
}
return(0);
}
|