Here is my win32_handmade.cpp
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 | #include <windows.h> #define local_persist static #define global_variable static #define internal static global_variable bool Running; global_variable BITMAPINFO BitmapInfo; global_variable void *BitmapMemory; global_variable HBITMAP BitmapHandle; global_variable HDC BitmapDeviceContext; internal void Win32ResizeDIBSection(int Width, int Height) { // TODO: Bulletproff this. // Maybe don't free first, free after then free first if that fails // TODO: Free our DIBSection if (BitmapHandle) { DeleteObject(BitmapHandle); } if (!BitmapDeviceContext) { // TODO: Should we recreate these under certain special circumstances BitmapDeviceContext = CreateCompatibleDC(0); } BitmapInfo.bmiHeader.biSize = sizeof(BitmapInfo.bmiHeader); BitmapInfo.bmiHeader.biWidth = Width; BitmapInfo.bmiHeader.biHeight = Height; BitmapInfo.bmiHeader.biPlanes = 1; BitmapInfo.bmiHeader.biBitCount = 32; BitmapInfo.bmiHeader.biCompression = BI_RGB; BitmapDeviceContext = CreateCompatibleDC(0); BitmapHandle = CreateDIBSection( BitmapDeviceContext, &BitmapInfo, DIB_RGB_COLORS, &BitmapMemory, 0, 0); } internal void Win32UpdateWindow(HDC DeviceContext, int X, int Y, int Width, int Height) { StretchDIBits( DeviceContext, X, Y, Width, Height, X, Y, Width, Height, 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_CLOSE: { // TODO: Handle this with a message to the user? Running = false; } break; case WM_ACTIVATEAPP: { OutputDebugStringA("WM_ACTIVATEAPP\n"); } break; case WM_DESTROY: { // TODO: Handle this as an error - recreate window? 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; Win32UpdateWindow(DeviceContext, X, Y, Width, Height); EndPaint(Window, &Paint); } break; default: { Result = DefWindowProcA(Window, Message, wParam, lParam); // OutputDebugStringA("default\n"); } break; } return (Result); } int CALLBACK WinMain(HINSTANCE Instance, HINSTANCE PrevInstance, LPSTR CommandLine, int ShowCode) { WNDCLASSA WindowClass = {}; 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) { Running = true; while (Running) { MSG Message; BOOL MessageResult = GetMessageA(&Message, 0, 0, 0); if (MessageResult > 0) { TranslateMessage(&Message); DispatchMessageA(&Message); } else { break; } } } else { // TODO: Logging } } else { // TODO: Logging } return (0); } |