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/***************************************************************************
pnmtools.c - routines for creating pnm images.
-------------------
begin : Sat Oct 14 2000
copyright : (C) 2000 by pnm2ppa project
email :
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <math.h>
#include "pnmtools.h"
/* setpixel(x,y,color) writes a pixel with bytecode color at (x,y)*/
void
setpixel(int x,int y, unsigned char color )
{
int charidx;
if( y < BitMap_topline || y >= BitMap_bottomline ) return;
if( x < 0 || x >= BitMap_Width ) return;
charidx = (y-BitMap_topline)*BitMap_Width+x;
color_bitmap[charidx] = color ;
}
/*setplus(x,y,s) writes a black "+" of size s centered at (x,y) */
void
setplus(int x,int y,int s)
{
int i;
for(i=0; i<s; i++)
{
setpixel(x+i,y,1);
setpixel(x-i,y,1);
setpixel(x,y+i,1);
setpixel(x,y-i,1);
}
}
/*setx(x,y,s) writes a black "X" of size s centered (x,y) */
void
setx(int x,int y,int s)
{
int i;
for(i=0; i<s; i++)
{
setpixel(x+i,y+i,1);
setpixel(x-i,y+i,1);
setpixel(x+i,y-i,1);
setpixel(x-i,y-i,1);
}
}
/*setblock(x,y,s) writes a solid black square block of size s
centered at (x,y) */
void
setblock(int x,int y,int s)
{
int i,j;
for(i=0; i<s; i++)
for(j=0; j<s; j++)
setpixel(x+i,y+j,1);
}
/*
setchar(x,y,c,s) writes a black character c at (x,y), using blocks
of size s. The supported characters c belong to a 38-character alphabet
(0-9, A-Z, -, +)
*/
void
setchar(int x,int y,char c,int s)
{
int xo,yo;
static char charmap[38][5]= { { 0x3e, 0x41, 0x41, 0x41, 0x3e }, /* 0 */
{ 0x00, 0x42, 0x7f, 0x40, 0x00 }, /* 1 */
{ 0x42, 0x61, 0x51, 0x49, 0x46 }, /* 2 */
{ 0x22, 0x41, 0x49, 0x49, 0x36 }, /* 3 */
{ 0x18, 0x14, 0x12, 0x7f, 0x10 }, /* 4 */
{ 0x27, 0x45, 0x45, 0x45, 0x39 }, /* 5 */
{ 0x3e, 0x49, 0x49, 0x49, 0x32 }, /* 6 */
{ 0x01, 0x01, 0x61, 0x19, 0x07 }, /* 7 */
{ 0x36, 0x49, 0x49, 0x49, 0x36 }, /* 8 */
{ 0x26, 0x49, 0x49, 0x49, 0x3e }, /* 9 */
{ 0x7c, 0x12, 0x11, 0x12, 0x7c }, /* A */
{ 0x7f, 0x49, 0x49, 0x49, 0x36 }, /* B */
{ 0x3e, 0x41, 0x41, 0x41, 0x22 }, /* C */
{ 0x7f, 0x41, 0x41, 0x41, 0x3e }, /* D */
{ 0x7f, 0x49, 0x49, 0x49, 0x41 }, /* E */
{ 0x7f, 0x09, 0x09, 0x09, 0x01 }, /* F */
{ 0x3e, 0x41, 0x41, 0x51, 0x32 }, /* G */
{ 0x7f, 0x08, 0x08, 0x08, 0x7f }, /* H */
{ 0x00, 0x41, 0x7f, 0x41, 0x00 }, /* I */
{ 0x61, 0x41, 0x41, 0x7f, 0x01 }, /* J */
{ 0x7f, 0x08, 0x14, 0x22, 0x41 }, /* K */
{ 0x7f, 0x40, 0x40, 0x40, 0x40 }, /* L */
{ 0x7f, 0x02, 0x04, 0x02, 0x7f }, /* M */
{ 0x7f, 0x06, 0x08, 0x30, 0x7f }, /* N */
{ 0x3e, 0x41, 0x41, 0x41, 0x3e }, /* O */
{ 0x7f, 0x09, 0x09, 0x09, 0x0f }, /* P */
{ 0x3e, 0x41, 0x51, 0x61, 0x7e }, /* Q */
{ 0x7f, 0x09, 0x19, 0x29, 0x4f }, /* R */
{ 0x22, 0x45, 0x49, 0x51, 0x22 }, /* S */
{ 0x01, 0x01, 0x7f, 0x01, 0x01 }, /* T */
{ 0x3f, 0x40, 0x40, 0x40, 0x3f }, /* U */
{ 0x07, 0x18, 0x60, 0x18, 0x07 }, /* V */
{ 0x3f, 0x40, 0x20, 0x40, 0x3f }, /* W */
{ 0x63, 0x14, 0x08, 0x14, 0x63 }, /* X */
{ 0x03, 0x04, 0x78, 0x04, 0x03 }, /* Y */
{ 0x61, 0x51, 0x49, 0x45, 0x43 }, /* Z */
{ 0x00, 0x08, 0x08, 0x08, 0x00 }, /* - */
{ 0x08, 0x08, 0x3e, 0x08, 0x08 } }; /* + */
if(c<='9' && c>='0' )
for(xo=0; xo<5; xo++)
for(yo=0; yo<8; yo++)
if((charmap[c-'0'][xo]>>yo)&1)
setblock(x+xo*s,y+yo*s,s);
if(c<='Z' && c>='A')
for(xo=0; xo<5; xo++)
for(yo=0; yo<8; yo++)
if((charmap[c-'A'+10][xo]>>yo)&1)
setblock(x+xo*s,y+yo*s,s);
if(c=='-')
for(xo=0; xo<5; xo++)
for(yo=0; yo<8; yo++)
if((charmap[36][xo]>>yo)&1)
setblock(x+xo*s,y+yo*s,s);
if(c=='+')
for(xo=0; xo<5; xo++)
for(yo=0; yo<8; yo++)
if((charmap[37][xo]>>yo)&1)
setblock(x+xo*s,y+yo*s,s);
}
/* setstring(x,y,*p,s) writes the string *p starting
at (x,y), in characters of size s. The letters of the string
must belong to the alphabet (0-9,A-Z,+,-) supported by setchar() */
void
setstring(int x,int y,char* s,int size)
{
char* p;
int xo;
for(xo=0, p=s; *p; xo+=((6*size)+1), p++)
setchar(x+xo,y,*p,size);
}
/* like setstring, but writes vertically downwards*/
void
setstringv(int x,int y,char* s,int size)
{
char* p;
int yo;
for(yo=0, p=s; *p; yo+=((7*size)+1), p++)
setchar(x,y+yo,*p,size);
}
/* setCG(x,y) writes a "centering symbol" at (x,y) */
void
setCG(int x,int y)
{
int xo,yo,zo;
for(xo=0; xo<=50; xo++)
{
yo=sqrt(50.0*50.0-xo*xo);
setpixel(x+xo,y+yo,1);
setpixel(x+yo,y+xo,1);
setpixel(x-1-xo,y-1-yo,1);
setpixel(x-1-yo,y-1-xo,1);
setpixel(x+xo,y-1-yo,1);
setpixel(x-1-xo,y+yo,1);
for(zo=0; zo<yo; zo++)
{
setpixel(x+xo,y-1-zo,1);
setpixel(x-1-xo,y+zo,1);
}
}
}
/* setsquare(x,y,s,r,g,b) looks like it is supposed to
write a solid colored square of size s, bounded by a black
box, "at" (x,y). with "color" (r,g,b). This is
definitely broken by the color coding scheme used by
setpixel
*/
void
setsquare(int x, int y, int s, int r, int g, int b)
{
int i,j;
int charidx;
if(x<0 || x>=Width) return;
if(y<BitMap_topline || y>=BitMap_bottomline) return;
for(i=0; i<s; i++)
for(j=0; j<s; j++)
{
charidx=(y-BitMap_topline+j)*BitMap_Width+(x+i)*3;
color_bitmap[charidx] = r;
color_bitmap[charidx+1] = g;
color_bitmap[charidx+2] = b;
}
for(j=0; j<s; j++)
{
charidx=(y-BitMap_topline+j)*BitMap_Width+(x)*3;
color_bitmap[charidx] = color_bitmap[charidx+1] = color_bitmap[charidx+2] = 0;
charidx+=s*3;
color_bitmap[charidx] = color_bitmap[charidx+1] = color_bitmap[charidx+2] = 0;
}
for(i=0; i<s; i++)
{
charidx=(y-BitMap_topline)*BitMap_Width+(x+i)*3;
color_bitmap[charidx] = color_bitmap[charidx+1] = color_bitmap[charidx+2] = 0;
charidx+=s*BitMap_Width;
color_bitmap[charidx] = color_bitmap[charidx+1] = color_bitmap[charidx+2] = 0;
}
}
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