graphics.h头文件代码

`graphics.h` 是一个早期的 C 语言库，用于创建图形用户界面。它主要被用于 DOS 系统下的图形编程，现在已经被淘汰了。以下是一个简单的 `graphics.h` 头文件代码示例：

#ifndef GRAPHICS_H
#define GRAPHICS_H

#include <conio.h>
#include <dos.h>

/* 定义颜色 */
enum COLORS {
    BLACK,
    BLUE,
    GREEN,
    CYAN,
    RED,
    MAGENTA,
    BROWN,
    LIGHTGRAY,
    DARKGRAY,
    LIGHTBLUE,
    LIGHTGREEN,
    LIGHTCYAN,
    LIGHTRED,
    LIGHTMAGENTA,
    YELLOW,
    WHITE
};

/* 定义图形驱动器 */
enum GRAPHICS_DRIVER {
    DETECT,
    CGA,
    MCGA,
    EGA,
    EGA64,
    EGAMONO,
    IBM8514,
    HERCMONO
};

/* 定义线样式 */
enum LINE_STYLE {
    SOLID_LINE,
    DOTTED_LINE,
    CENTER_LINE,
    DASHED_LINE,
    USERBIT_LINE
};

/* 定义填充样式 */
enum FILL_STYLE {
    EMPTY_FILL,
    SOLID_FILL,
    LINE_FILL,
    LTSLASH_FILL,
    SLASH_FILL,
    BKSLASH_FILL,
    LTBKSLASH_FILL,
    HATCH_FILL,
    XHATCH_FILL,
    INTERLEAVE_FILL,
    WIDE_DOT_FILL,
    CLOSE_DOT_FILL,
    USER_FILL
};

/* 定义文本方向 */
enum TEXT_DIRECTION {
    HORIZ_DIR,
    VERT_DIR
};

/* 定义字体 */
enum FONT {
    DEFAULT_FONT,
    TRIPLEX_FONT,
    SMALL_FONT,
    SANS_SERIF_FONT,
    GOTHIC_FONT
};

/* 定义图形窗口 */
struct viewporttype {
    int left, top, right, bottom;
    int clip;
};

/* 定义宏 */
#define MAXCOLORS     15
#define MAXMODES      7
#define MAXHANDLES    4

/* 函数声明 */
void arc(int x, int y, int start_angle, int end_angle, int radius);
void bar(int left, int top, int right, int bottom);
void circle(int x, int y, int radius);
void cleardevice();
void clearviewport();
void closegraph();
void detectgraph(int *graphdriver, int *graphmode);
void drawpoly(int numpoints, int *polypoints);
void ellipse(int x, int y, int start_angle, int end_angle, int xradius, int yradius);
void fillellipse(int x, int y, int xradius, int yradius);
void fillpoly(int numpoints, int *polypoints);
void floodfill(int x, int y, int border);
void getarccoords(struct arccoordstype *arccoords);
void getaspectratio(int *xasp, int *yasp);
int getbkcolor();
int getcolor();
struct palettetype *getdefaultpalette();
char *getdrivername();
void getfillpattern(char *pattern);
void getfillsettings(struct fillsettingstype *fillinfo);
int getgraphmode();
void getimage(int left, int top, int right, int bottom, void *bitmap);
void getlinesettings(struct linesettingstype *lineinfo);
int getmaxcolor();
int getmaxmode();
int getmaxx();
int getmaxy();
char *getmodename(int mode_number);
void getmoderange(int graphdriver, int *lomode, int *himode);
unsigned getpixel(int x, int y);
void getpalette(struct palettetype *palette);
int getpalettesize();
void gettextsettings(struct textsettingstype *texttypeinfo);
void getviewsettings(struct viewporttype *viewport);
int getx();
int gety();
void graphdefaults();
char *grapherrormsg(int errorcode);
int graphresult();
unsigned imagesize(int left, int top, int right, int bottom);
void initgraph(int *graphdriver, int *graphmode, char *pathtodriver);
int installuserdriver(char *name, int (*detect)(void));
int installuserfont(char *name);
void line(int x1, int y1, int x2, int y2);
void linerel(int dx, int dy);
void lineto(int x, int y);
void moverel(int dx, int dy);
void moveto(int x, int y);
void outtext(char *textstring);
void outtextxy(int x, int y, char *textstring);
void pieslice(int x, int y, int start_angle, int end_angle, int radius);
void putimage(int left, int top, void *bitmap, int op);
void putpixel(int x, int y, int color);
void rectangle(int left, int top, int right, int bottom);
void restorecrtmode();
void sector(int x, int y, int start_angle, int end_angle, int xradius, int yradius);
void setactivepage(int page);
void setallpalette(struct palettetype *palette);
void setaspectratio(int xasp, int yasp);
void setbkcolor(int color);
void setcolor(int color);
void setfillpattern(char *upattern, int color);
void setfillstyle(int pattern, int color);
unsigned setgraphbufsize(unsigned bufsize);
void setgraphmode(int mode);
void setlinestyle(int linestyle, unsigned upattern, int thickness);
void setpalette(int colornum, int color);
void settextjustify(int horiz, int vert);
void settextstyle(int font, int direction, int charsize);
void setusercharsize(int multx, int divx, int multy, int divy);
void setviewport(int left, int top, int right, int bottom, int clip);
void setvisualpage(int page);
void setwritemode(int mode);
int textheight(char *textstring);
int textwidth(char *textstring);

#endif