SDL 五子棋游戏

http://www.jb51.net/article/79271.htm

1.定义窗口大小，棋盘大小

SDL_GetWindowSize（）读取窗口大小，

由于棋盘是15*15格局，上下留白一行，在另外加一个状态行，所以每行高度为width/17

2.图片加载

surface = IMG_Load(file）

texture = SDL_CreateTextureFromSurface（render, surface）

free(surface)

return texture;

3.文字加载

pFont = TTF_OpenFont(FontFile, 20)

surface = TTF_RenderUTF8_Blended(pFont, string, color)

texture = SDL_CreateTextureFromSurface（render, surface）

free(surface)

return texture

4.绘制

SDL_RenderClear(pRenderer); 先清空

SDL_RenderCopyEx(pRenderer, pBackTexture, NULL, NULL, 0, NULL, SDL_FLIP_NONE);拷贝texture

//src_rect//dst//angle//center

SDL_RenderPresent(pRenderer);提交显示

5.绘制接口

SDL_RenderDrawLine(SDL_Renderer * renderer, int x1, int y1, int x2, int y2) 画线

SDL_SetRenderDrawColor(SDL_Renderer * renderer, Uint8 r, Uint8 g, Uint8 b, Uint8 a)设置render颜色　　

SDL_RenderFillRect(SDL_Renderer * renderer, const SDL_Rect * rect)填充颜色

6.事件监听

　 SDL_QUIT

/* Window events */
    SDL_WINDOWEVENT    = 0x200, /**< Window state change */
    SDL_SYSWMEVENT,             /**< System specific event */

/* Keyboard events */
    SDL_KEYDOWN        = 0x300, /**< Key pressed */
    SDL_KEYUP,                  /**< Key released */
    SDL_TEXTEDITING,            /**< Keyboard text editing (composition) */
    SDL_TEXTINPUT,              /**< Keyboard text input */
    SDL_KEYMAPCHANGED,          /**< Keymap changed due to a system event such as an
                                     input language or keyboard layout change.
                                */

/* Mouse events */
    SDL_MOUSEMOTION    = 0x400, /**< Mouse moved */
    SDL_MOUSEBUTTONDOWN,        /**< Mouse button pressed */
    SDL_MOUSEBUTTONUP,          /**< Mouse button released */
    SDL_MOUSEWHEEL,             /**< Mouse wheel motion */

/* Joystick events */
    SDL_JOYAXISMOTION  = 0x600, /**< Joystick axis motion */
    SDL_JOYBALLMOTION,          /**< Joystick trackball motion */
    SDL_JOYHATMOTION,           /**< Joystick hat position change */
    SDL_JOYBUTTONDOWN,          /**< Joystick button pressed */
    SDL_JOYBUTTONUP,            /**< Joystick button released */
    SDL_JOYDEVICEADDED,         /**< A new joystick has been inserted into the system */
    SDL_JOYDEVICEREMOVED,       /**< An opened joystick has been removed */

/* Game controller events */
    SDL_CONTROLLERAXISMOTION  = 0x650, /**< Game controller axis motion */
    SDL_CONTROLLERBUTTONDOWN,          /**< Game controller button pressed */
    SDL_CONTROLLERBUTTONUP,            /**< Game controller button released */
    SDL_CONTROLLERDEVICEADDED,         /**< A new Game controller has been inserted into the system */
    SDL_CONTROLLERDEVICEREMOVED,       /**< An opened Game controller has been removed */
    SDL_CONTROLLERDEVICEREMAPPED,      /**< The controller mapping was updated */

/* Touch events */
    SDL_FINGERDOWN      = 0x700,
    SDL_FINGERUP,
    SDL_FINGERMOTION,

/* Gesture events */
    SDL_DOLLARGESTURE   = 0x800,
    SDL_DOLLARRECORD,
    SDL_MULTIGESTURE,

/* Clipboard events */
    SDL_CLIPBOARDUPDATE = 0x900, /**< The clipboard changed */

/* Drag and drop events */
    SDL_DROPFILE        = 0x1000, /**< The system requests a file open */
    SDL_DROPTEXT,                 /**< text/plain drag-and-drop event */
    SDL_DROPBEGIN,                /**< A new set of drops is beginning (NULL filename) */
    SDL_DROPCOMPLETE,             /**< Current set of drops is now complete (NULL filename) */

/* Audio hotplug events */
    SDL_AUDIODEVICEADDED = 0x1100, /**< A new audio device is available */
    SDL_AUDIODEVICEREMOVED,        /**< An audio device has been removed. */

/* Render events */
    SDL_RENDER_TARGETS_RESET = 0x2000, /**< The render targets have been reset and their contents need to be updated */
    SDL_RENDER_DEVICE_RESET, /**< The device has been reset and all textures need to be recreated */

/** Events ::SDL_USEREVENT through ::SDL_LASTEVENT are for your use,
     *  and should be allocated with SDL_RegisterEvents()
     */
    SDL_USEREVENT    = 0x8000,