C语言 setfillstyle() and floodfill()用法及代码示例

头文件graphics.h包含setfillstyle()函数，该函数设置当前的填充图案和填充颜色。 floodfill()函数用于填充封闭区域。当前的填充图案和填充颜色用于填充区域。

用法:

void setfillstyle(int pattern, int color)

void floodfill(int x, int y, int border_color)

例子：

Input:pattern = HATCH_FILL, Color = RED 
        circle:x = 250, y = 250, radius = 100 
        floodfill:x = 250, y = 250, border color =15
Output:


Input:pattern = LTSLASH_FILL, Color = RED
       rectangle:left = 200, top = 200, right = 450, bottom = 450
       floodfill:x = 201, y = 201, border_color = 15
Output:

下表显示了与颜色相对应的INT VALUES：

COLOR               INT VALUES
-------------------------------
BLACK                   0
BLUE                    1
GREEN                   2
CYAN                    3   
RED                     4
MAGENTA                 5
BROWN                   6 
LIGHTGRAY               7 
DARKGRAY                8
LIGHTBLUE               9
LIGHTGREEN             10
LIGHTCYAN              11
LIGHTRED               12
LIGHTMAGENTA           13
YELLOW                 14
WHITE                  15

下表显示了对应于模式的INT VALUES：

PATTERN              INT VALUES
-------------------------------
EMPTY_FILL               0
SOLID_FILL               1
LINE_FILL                2
LTSLASH_FILL             3   
SLASH_FILL               4
BKSLASH_FILL             5
LTBKSLASH_FILL           6 
HATCH_FILL               7 
XHATCH_FILL              8
INTERLEAVE_FILL          9
WIDE_DOT_FILL           10
CLOSE_DOT_FILL          11
USER_FILL               12

以下是setfillstyle()和floodfill()函数的实现：

// C Implementation for setfillstyle 
// and floodfill function 
#include <graphics.h> 
  
// driver code 
int main() 
{ 
    // gm is Graphics mode which is  
    // a computer display mode that 
    // generates image using pixels. 
    // DETECT is a macro defined in 
    // "graphics.h" header file 
    int gd = DETECT, gm; 
      
    // initgraph initializes the  
    // graphics system by loading 
    // a graphics driver from disk 
    initgraph(&gd, &gm, " "); 
  
    // center and radius of circle 
    int x_circle = 250; 
    int y_circle = 250; 
    int radius=100; 
      
    // setting border color 
    int border_color = WHITE; 
      
      
    // set color and pattern 
    setfillstyle(HATCH_FILL,RED); 
      
    // x and y is a position and 
    // radius is for radius of circle 
    circle(x_circle,y_circle,radius); 
      
    // fill the color at location  
    // (x, y) with in border color 
    floodfill(x_circle,y_circle,border_color); 
  
    getch(); 
      
    // closegraph function closes the 
    // graphics mode and deallocates 
    // all memory allocated by  
    // graphics system  
    closegraph(); 
      
    return 0; 
}

输出：