rainbow.c

svga演示代码,需要安装svgalib方可运行

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <vga.h>
#include <vgagl.h>
#include <math.h>
void draw_wjx(int x,int y,int r);
int draw_bo(int pointx,int pointy);
void draw_text(int x,int y,int xlarge, int ylarge,unsigned char *ch) ;
int main() 

{ 
	int i,j; 
	int flag; 
	unsigned char *colors; 
	vga_init(); 
	vga_setmode(G800x600x256); 
	vga_setcolor(4);
	for(;;)
	{
	for(i=0;i<255;i++)
	{
		if(i%2)
		{
		vga_setcolor(i);
		draw_wjx(200,100,50);
		draw_wjx(400,100,50);
		draw_wjx(600,100,50);
		usleep(200000);
		}
		else if(i%3)
		{
		vga_setcolor(i);	
		draw_bo(0,200);
		draw_bo(0,250);
		draw_bo(0,300);
		draw_bo(0,350);
		draw_bo(0,400);
		usleep(200000);
		}
		else
		{
		vga_setcolor(i);
		draw_text(220,240,6,6,(unsigned char *)"神疯小组");
		usleep(200000);
		}
	}
	}
	vga_getch();
	vga_setmode(TEXT);//回到控制台字符模式 
	free(colors);
	 
	return 0; 

} 
void draw_wjx(int x,int y,int r)
{
	int m[5],n[5],i; 
	float t=6.28318/5;
	for(i=0;i<5;i++)
	{ 
		m[i]=r*cos(i*t)+x;
		n[i]=r*sin(i*t)+y;
	}
	//vga_setcolor(5);
	for(i=0;i<5;i++)
		//vga_setcolor(5);
		vga_drawline(m[i],n[i],m[(i+2)%5],n[(i+2)%5]);
}
int draw_bo(int pointx,int pointy)
{
	int i,g;
	g=pointy;
	for(i=1;i<800;i++) 
	{ 
		vga_drawline(pointx,pointy,i,g+30*sin(i*M_PI/90)); 
		pointx=i; 
		pointy=g+30*sin(i*M_PI/90);
	}
}
void draw_text(int x,int y,int xlarge, int ylarge,unsigned char *ch)   
  {   
    int   i,k,j,c,l,m,n;   
	
    unsigned   char   mat[16][2];   
    unsigned   char   mat1[16];   
      char   *p;   
    FILE   *hzk,*ywk;   
    //vga_setcolor(i);   
    hzk=fopen("hzk16","rb");   
    ywk=fopen("asc16","rb");   
    if   (hzk==NULL)   
    {   
        perror("Open   hzk16   file   error");   
        exit(1);   
    }   
    if(ywk==NULL){   	
      perror("Open   asc16   file   error");   
      exit(1);   
    }   
    l=strlen(ch);   
    //vga_setrgbcolor(251,0,0);   
    for(c=0;c<l;c++)   
    {   
      if(ch[c]>127)
      {   
      i=ch[c]-0xa0;j=ch[c+1]-0xa0;   
      fseek(hzk,(94*(i-1)+(j-1))*32,SEEK_SET);   
      fread(mat,32,1,hzk);   
      for(i=0;i<16;i++) 
	  for(m=0;m<xlarge;m++) 
     		for(j=0;j<2;j++)   
      			for(k=0;k<8;k++)   
	  			for(n=0;n<ylarge;n++)
      if(mat[i][j]&(0x80>>k))   
            vga_drawpixel(x+c*8*xlarge+8*j*xlarge+k*xlarge+n,y+i*ylarge+m);   
      c++;   
    }else{   
      fseek(ywk,ch[c]*16,SEEK_SET);   
      fread(mat1,16,1,ywk);   
      for(i=0;i<16;i++)   
      for(k=0;k<8;k++)   
      if(mat1[i]&(0x80>>k)   )   
          vga_drawpixel(x+c*8*xlarge+k*xlarge+n,y+i*ylarge+m);   
    }   
  }   
  }