📄 图形旋转的c语言源程序.htm
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<P align=center><FONT color=#cc0000
size=5><B>图形旋转的C语言源程序</B></FONT></P>
<P>/*****************************************************************/<BR>/*
CONVOLVE.C - Turbo C 2.0 implementation of image
convolution */<BR>/* ---------- by Wesley G.
Faler. All code is "as is". There */<BR>/* is NO
copyright. Use this code as you will, and if you
make */<BR>/* money at it, good for you.
*/<BR>/*****************************************************************/</P>
<P>#include<stdlib.h><BR>#include<stdio.h><BR>#include<graphics.h><BR>#include<alloc.h><BR>#include<ctype.h></P>
<P>int load_cut(char *fname);<BR>int
load_convolution_matrix(char *fname);<BR>int
convolve_image(void);<BR>int
swap_pictures(void);</P>
<P>int minx,maxx,miny,maxy;<BR>int
LOADPAGE=0;<BR>int ENHANCEPAGE=1;<BR>int *cmat,
*pmat, *vmat;<BR>int cmx,cmy,cmnum;</P>
<P>struct palettetype palette,newpal;<BR>int
driver,mode;</P>
<P>int cleancut=-1;</P>
<P>int init_graphics(void)<BR>{<BR>driver=DETECT;
mode=0;<BR>detectgraph(&driver,&mode);<BR>if(driver==VGA)
mode=VGAMED;<BR>initgraph(&driver,&mode,"");<BR>getpalette(&palette);<BR>getpalette(&newpal);<BR>}</P>
<P>int cleanup_image(void)<BR>{<BR>int
i,j,num,x,y,k;</P>
<P>if(cleancut<0)
return;<BR>setactivepage(LOADPAGE);<BR>setvisualpage(ENHANCEPAGE);<BR>for(x=minx;x<maxx;x++)
{<BR>for(y=miny;y<maxy;y++)
{<BR>if(getpixel(x,y)!=0) num=-1;<BR>else
num=0;<BR>for(j=-1;j<2;j++)
{<BR>for(i=-1;i<2;i++)
{<BR>if(getpixel(x+i,y+j)!=0)
num++;<BR>}<BR>}<BR>if(num>cleancut)
{<BR>k=getpixel(x,y);<BR>setactivepage(ENHANCEPAGE);<BR>putpixel(x,y,k);<BR>setactivepage(LOADPAGE);<BR>}<BR>}<BR>}<BR>k=ENHANCEPAGE;
ENHANCEPAGE=LOADPAGE; LOADPAGE=k;<BR>}</P>
<P>void show_test_image(void)<BR>{<BR>int i;</P>
<P>minx=cmx; miny=cmy;<BR>maxx=100+minx;
maxy=100+miny;<BR>setcolor(1);<BR>moveto(minx,miny);<BR>randomize();<BR>for(i=0;i<20;i++)<BR>lineto(random(100)+minx,random(100)+miny);<BR>for(i=0;i<10;i++)<BR>fillellipse(random(50)+25+minx,random(50)+25+miny,random(25),random(25));<BR>}</P>
<P>main()<BR>{<BR>char fname[50];<BR>int
flag=0;</P>
<P>load_convolution_matrix("matrix.dat");<BR>printf(".CUT
file (1) or test image
(0)?");<BR>scanf("%d",&flag);<BR>flag= flag?
1:0;<BR>if(flag)
{<BR>fflush(stdin);<BR>printf("filename to
process:");<BR>gets(fname);<BR>}</P>
<P>printf("Delete pixels with x or fewer
neighbors.
x=");<BR>scanf("%d",&cleancut);<BR>if(cleancut>8)
cleancut=8;</P>
<P>init_graphics();<BR>setactivepage(1);
cleardevice();<BR>setactivepage(0);
cleardevice();</P>
<P>setactivepage(LOADPAGE);
setvisualpage(LOADPAGE);<BR>if(flag)
load_cut(fname);<BR>else
show_test_image();<BR>cleanup_image();</P>
<P>setvisualpage(ENHANCEPAGE);<BR>convolve_image();</P>
<P>swap_pictures();<BR>restorecrtmode();<BR>}</P>
<P>int toggle_colors(char
c)<BR>{<BR>c=tolower(c);<BR>c=c-'a';<BR>if(c<0
|| c>=palette.size) return
0;<BR>newpal.colors[c]=
palette.colors[c]-newpal.colors[c];<BR>setpalette(c,newpal.colors[c]);<BR>return
1;<BR>}</P>
<P>int swap_pictures(void)<BR>{<BR>int
mode=0;<BR>char a;</P>
<P>setvisualpage(LOADPAGE);<BR>for(;;)
{<BR>a=getch();<BR>if(a==27)
return;<BR>if(toggle_colors(a))
continue;<BR>if(mode==0)
setvisualpage(ENHANCEPAGE);<BR>if(mode==1)
setvisualpage(LOADPAGE);<BR>mode=1-mode;<BR>}<BR>}</P>
<P>int convolve_image(void)<BR>{<BR>int
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