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175 | #include <windows.h>
#include <stdint.h>
#define Internal static
#define LocalPersist static
#define GlobalVariable static
typedef uint8_t uint8;
typedef uint16_t uint16;
typedef uint32_t uint32;
typedef uint64_t uint64;
typedef int8_t int8;
typedef int16_t int16;
typedef int32_t int32;
GlobalVariable bool Running;
GlobalVariable BITMAPINFO BitmapInfo;
GlobalVariable void *BitmapMemory;
GlobalVariable int BitmapWidth;
GlobalVariable int BitmapHeight;
GlobalVariable WNDCLASS WindowClass;
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) {
uint32 *Pixel = (uint32 *)&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 WindowHeight = WindowRect->bottom - WindowRect->top;
StretchDIBits(DeviceContext,
0, 0, BitmapWidth, BitmapHeight,
0, 0, WindowWidth, WindowHeight,
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_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;
}
case WM_ACTIVATEAPP:
{
OutputDebugStringA("WM_ACTIVATEAPP\n");
break;
}
default:
{
Result = DefWindowProcA(Window, Message, wParam, lParam);
}
}
return Result;
}
int CALLBACK WinMain(HINSTANCE Instance, HINSTANCE PrevInstance, LPSTR CommandLine, int ShowCode) {
WindowClass.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
WindowClass.lpfnWndProc = Win32MainWindowCallback;
WindowClass.hInstance = Instance;
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) {
Running = true;
while (Running) {
MSG Message;
BOOL MessageResult = GetMessageA(&Message, 0, 0, 0);
if (MessageResult > 0) {
TranslateMessage(&Message);
DispatchMessageA(&Message);
}
else {
break;
}
}
}
else {
}
}
else {
}
return 0;
}
|