可用MinGW编译的win32绘图框架_mingw编译win32

鉴于Microsoft Visual Studio体积巨大，我坚持不愿意安装，故在windows下编程一直都用MinGW和TCC作为编译器，用Codebocks作为开发环境。MinGW对于C/C++标准库支持很好，但是对于windows API就没那么好了。由于windows家族从win32API-> MFC->WPF->.net，体积庞大演变复杂，第三方库显然无法承载。
对于我个人工作，console下的操作使用标准库函数已经足够，文件操作使用.bat批处理，网路操作使用Python，唯一需要win32系统函数的地方就是图形界面了。这次在编写botzone的贪吃蛇程序时，平台规定用cpp+jsoncpp，为了方便调试，只好使用MinGW调用win32API库做一个简单的绘图框架。
由于GDI库过于底层，使用起来很庞杂，我的思路是写一个固定的框架代码，每隔30ms显示某内存中的固定图片（别忘了加锁），其他所有的绘制过程都归结到对于图片的图形绘制上去。这样最大限度地隔离了win32系统。

首先建立基本的主入口和消息循环函数WinMain:

#include <windows.h>
int WINAPI WinMain (HINSTANCE hThisInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpszArgument,
                    int nCmdShow)
{
    HWND hwnd;               /* This is the handle for our window */
    MSG messages;            /* Here messages to the application are saved */
    WNDCLASSEX wincl;        /* Data structure for the windowclass */

    /* The Window structure */
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
    wincl.style = CS_DBLCLKS;                 /* Catch double-clicks */
    wincl.cbSize = sizeof (WNDCLASSEX);

    /* Use default icon and mouse-pointer */
    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;                 /* No menu */
    wincl.cbClsExtra = 0;                      /* No extra bytes after the window class */
    wincl.cbWndExtra = 0;                      /* structure or the window instance */
    /* Use Windows's default colour as the background of the window */
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;

    /* Register the window class, and if it fails quit the program */
    if (!RegisterClassEx (&wincl))
        return 0;

    /* The class is registered, let's create the program*/
    hwnd = CreateWindowEx (
               0,                   /* Extended possibilites for variation */
               szClassName,         /* Classname */
               "Double Snake Game Simulator",       /* Title Text */
               WS_OVERLAPPEDWINDOW, /* default window */
               CW_USEDEFAULT,       /* Windows decides the position */
               CW_USEDEFAULT,       /* where the window ends up on the screen */
               800,                 /* The programs width */
               600,                 /* and height in pixels */
               HWND_DESKTOP,        /* The window is a child-window to desktop */
               NULL,                /* No menu */
               hThisInstance,       /* Program Instance handler */
               NULL                 /* No Window Creation data */
           );

    /* Make the window visible on the screen */
    ShowWindow (hwnd, nCmdShow);


    /* Run the message loop. It will run until GetMessage() returns 0 */
    while (GetMessage (&messages, NULL, 0, 0))
    {
        /* Translate virtual-key messages into character messages */
        TranslateMessage(&messages);
        /* Send message to WindowProcedure */
        DispatchMessage(&messages);
    }


    /* The program return-value is 0 - The value that PostQuitMessage() gave */
    return messages.wParam;
}
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消息处理函数

LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)                  /* handle the messages */
    {
    case WM_TIMER:
        RedrawWindow(hwnd
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