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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 | #include <Windows.h> #include <stdint.h> #define internal static #define local_persist static #define global_variable 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; typedef int64_t int64; //This is a global for now global_variable bool Running; global_variable BITMAPINFO BitmapInfo; global_variable void* BitmapMemory; global_variable int BitmapWidth; global_variable int BitmapHeight; internal void Win32ResizeDIBsection(int Width, int Height) { // Bulletproof this //Maybe don't free the memory first, use the old memory of the buffer //free after it is created, free first is that fails however if(BitmapMemory) { VirtualFree(BitmapMemory, 0, MEM_RELEASE); } BitmapWidth = Width; BitmapHeight = Height; //Set the bitmapinfo to define the limits of the buffer 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; //Allocate ourselves 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; y < BitmapWidth; ++x) { /* 0 1 2 3 Pixel in memory: BB GG RR xx Little Endian Arcitecture 0x xxGGBBRR > xxRRGGBB They swapped it, B is first, G is second, R is last */ *Pixel = 0; //It throws the exception here ++Pixel; *Pixel = 0; ++Pixel; *Pixel = 255; ++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; //Stretches or updates the pixels within the rectangle that has just been changed in size StretchDIBits(DeviceContext, /* x, y, Width, Height, x, y, Width, Height, */ 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; // A switch statement that takes in a message and outputs it in the debugger // It also takes in a paint message that once called, it draws a rectangle switch(Message) { case WM_SIZE: { RECT ClientRect; GetClientRect(Window, &ClientRect); int Height = ClientRect.bottom - ClientRect.top; int Width = ClientRect.right - ClientRect.left; Win32ResizeDIBsection(Width, Height); OutputDebugStringA("WM_SIZE\n"); } break; case WM_DESTROY: { //Handle this as an error, recreate window Running = false; OutputDebugStringA("WM_DESTROY\n"); }break; case WM_CLOSE: { //Handle this as a pop up message to the user Running = false; OutputDebugStringA("WM_CLOSE\n"); }break; case WM_ACTIVATEAPP: { OutputDebugStringA("WM_ACTIVATEAPP\n"); }break; case WM_PAINT: { // Contains a pain struct with a RECT function that draws a rectangle // We create a handle and set a few variables // We draw a rectangle using the variables from rcpaint // We go back and fourth between black and white background when the window is updated PAINTSTRUCT Paint; RECT ClientRect; GetClientRect(Window, &ClientRect); HDC DeviceContext = BeginPaint(Window, &Paint); int x = Paint.rcPaint.left; int y = Paint.rcPaint.top; int Height = Paint.rcPaint.bottom - Paint.rcPaint.top; int Width = Paint.rcPaint.right - Paint.rcPaint.left; Win32UpdateWindow(DeviceContext, &ClientRect, x, y, Width, Height); EndPaint(Window, &Paint); }break; default: { // OutputDebugStringA("Default\n"); Result = DefWindowProc(Window, Message, WParam, LParam); }break; } return (Result); } int CALLBACK WinMain( HINSTANCE Instance, HINSTANCE PrevInstance, LPSTR CommandLine, int ShowCode) { WNDCLASS WindowClass = {}; WindowClass.style = CS_OWNDC; WindowClass.lpfnWndProc = Win32MainWindowCallback; WindowClass.hInstance = Instance; // HICON hIcon; WindowClass.lpszClassName = "HandMadeHeroWindowClass"; if(RegisterClass(&WindowClass)) { //Creates an overlapping window that is visible and has a border HWND WindowHandle = CreateWindowExA( 0, WindowClass.lpszClassName, "ThisIsWindowYo", WS_OVERLAPPEDWINDOW | WS_VISIBLE | WS_BORDER, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, 0, 0, Instance, 0); if(WindowHandle) { Running = true; while(Running) { //Loops through messages that are past to windows, it breaks when it recives a quit message //This allows the window to be displayed for more than one message MSG Message; BOOL MessageResult = GetMessage(&Message, 0, 0, 0); if(MessageResult > 0) { TranslateMessage(&Message); DispatchMessage(&Message); } else { break; } } } else { //Logging } } else { //Logging } return(0); } |
I've been at this problem for an hour and a half now; for some reason when debugging, visual studio throws an exception "write access violation" at line 73 and the window is unresponsive :"(