scroll.c

svga演示代码,需要安装svgalib方可运行

#include <stdlib.h>
#include <vga.h>
#include <vgagl.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#define FONT_HEIGHT 8
#define FONT_WIDTH  8
#define LEN sizeof(unsigned char)

void prepare_font(void);
void draw_text(int x,int y,unsigned char *ch);

int main()
{
	vga_init();
	vga_setmode(G800x600x256);
	gl_setcontextvga(G800x600x256);
	int x,n=2,i,j,m;
	char *p;
	unsigned char a[100000],b[100],c[2];
	FILE *fp;

	if((fp=fopen("aaa","r"))==NULL)
	{
		printf("wrong!\n");
		exit(1);
	}
	for(i=0;;i++)
	{
		if(feof(fp))
			break;
		fread(&a[i],LEN,1,fp);
	}
	j=strlen(a);
	
	if(j<100)
	{
		for(i=0;i<100;i++)
			b[i]=a[i];
		for(m=0;;m++)
		{
			for(x=800;x>=0;x-=8)
			{
				draw_text(x,100,(unsigned char *)b);
				if(m==0)
					gl_fillbox(0,100,x,100,0);
				gl_fillbox(0,100,16,100,0);
				usleep(100000);
				gl_clearscreen(0);
			}
		}
	}
	else
	{
		bbb:
	
	
		for(i=0;i<100;i++)
			b[i]=a[i];
		for(x=800;x>=0;x-=8)
		{
			if(x<17)
			{
				aaa:
				for(x=16;x>=0;x-=8)
				{
					draw_text(x,100,(unsigned char *)b);
					gl_fillbox(0,100,16,100,0);
					usleep(100000);
					gl_clearscreen(0);
				}
				for(i=0;i<100;i++)
					b[i]=a[i+n];
				if((i+n)>=j)
				{
					for(m=0;m<50;m++)
					{
						for(x=16;x>=0;x-=8)
						{
							draw_text(x,100,(unsigned char *)b);
							gl_fillbox(0,100,16,100,0);
							usleep(70000);
							gl_clearscreen(0);
						}
						for(i=0;i<98;i++)
							b[i]=b[i+2];
						b[i]=c[0];
						b[i+1]=c[1];
					}
				//	goto bbb;
			
				}
				else	
				{
					n+=2;
					goto aaa;
				}
			}
			else
			{
				draw_text(x,100,(unsigned char *)b);
				gl_fillbox(0,100,x,100,0);
				usleep(100000);
				gl_clearscreen(0);
			}
			
		}
		goto bbb;
	}

	vga_getch();
	gl_clearscreen(0);
	vga_setmode(TEXT);
	return EXIT_SUCCESS;
}

void draw_text(int x,int y,unsigned char *ch)
{
	int i,j,k,c,l;
	unsigned char mat[16][2];
	unsigned char mat1[16];
	char *p;
	FILE *hzk,*ywk;
	vga_setcolor(1);
	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(251,251,0);
	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(j=0;j<2;j++)
					for(k=0;k<8;k++)
						if(mat[i][j]&(0x80>>k))
							vga_drawpixel(x+c*8+8*j+k,y+i);
			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+k,y+i);
		}
	}
}