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#include "image.h"
#include "moon.h"
#include "pngwrite.h"
#include "stars.h"
#include "fail.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define VERSION "1.3"
static inline void usage( char *name )
{
char *base = name;
char *c;
for( c = name+1; *c; c++)
{
if( *(c-1) == '/' ) base = c;
}
printf( "this is pngphoon version " VERSION "\n\n"
"usage: %s options (* = mandatory)\n"
"\t-w # width*\n"
"\t-h # height*\n"
"\t-f $ filename*\n"
"\t-x # number of moons in x axis (for multihead configurations)\n"
"\t-y # number of moons in y axis (for multihead configurations)\n"
"\t-s # star density\n"
"\t-F $ foreground color\n"
"\t-B $ background color\n"
"\t-b black (no earthlight)\n"
"\t-S southern hemisphere (rotate image 180 degrees)\n"
"\t-q quiet (disable warnings)\n", base );
exit(0);
}
static png_color hex2col( const char *hexstr, const char *colname )
{
int convfail = 0;
png_color retval;
char *endstr;
unsigned long colval = strtoul( hexstr, &endstr, 16 );
if( *endstr )
{
convfail = 1;
}
else
{
switch( endstr-hexstr )
{
case 3:
retval.red = ((colval & 0xf00) >> 8) * 0x11;
retval.green = ((colval & 0x0f0) >> 4) * 0x11;
retval.blue = ((colval & 0x00f) ) * 0x11;
break;
case 6:
retval.red = (colval & 0xff0000) >> 16;
retval.green = (colval & 0x00ff00) >> 8;
retval.blue = (colval & 0x0000ff);
break;
default:
convfail = 1;
}
}
if( convfail )
{
fail( "%s color '%s' does not match 3 or 6 digit hex code\n",
colname, hexstr );
}
return retval;
}
int main( int argc, char *argv[] )
{
unsigned int width = 0;
unsigned int height = 0;
unsigned int drawheight = 0;
unsigned int xmoons = 1;
unsigned int ymoons = 1;
int stars = 50;
char *bgcolor = NULL;
char *fgcolor = NULL;
char *filename = NULL;
int black = 0;
int southern = 0;
image_t *image = NULL;
moon_t *moon = NULL;
int c;
unsigned int x;
unsigned int y;
png_color palette[2] = { { 0x00, 0x00, 0x00 }, { 0xff, 0xff, 0xff } };
opterr = 0;
if( argc == 1 )
{
usage( argv[0] );
}
while( (c = getopt( argc, argv, "w:h:x:y:s:F:B:f:bSq" )) != EOF )
{
switch (c)
{
case 'w':
width = strtoul( optarg, NULL, 0 );
break;
case 'h':
height = strtoul( optarg, NULL, 0 );
break;
case 'f':
filename = optarg;
break;
case 'x':
xmoons = strtoul( optarg, NULL, 0 );
break;
case 'y':
ymoons = strtoul( optarg, NULL, 0 );
break;
case 's':
stars = strtoul( optarg, NULL, 0 );
break;
case 'F':
fgcolor = optarg;
break;
case 'B':
bgcolor = optarg;
break;
case 'b':
black = 1;
break;
case 'S':
southern = 1;
break;
case 'q':
disablewarn();
break;
default:
fail( "unknown option: '%c'\n", optopt );
}
}
if( !width || !height || !filename )
{
fail( "you need to specify at least width, height and filename\n" );
}
moon = mooncreate();
if( width < moon->width )
{
warn( "image not wide enough for anything, just creating stars\n" );
xmoons = 0;
}
if( width < moon->width * xmoons )
{
warn( "decreasing number of moons in x axis from %d ", xmoons );
while( width < moon->width * --xmoons );
warn( "to %d moons.\n", xmoons );
}
drawheight = height;
if( height < moon->height )
{
warn( "image not high enough for moon, using truncate mode\n" );
drawheight = moon->height;
ymoons = 1;
}
else
{
if( height < moon->height * ymoons )
{
warn( "decreasing number of moons in y axis from %d ", ymoons );
/* this is not nice, but works: decreasing number of moons until they fit */
while( width < (moon->width * --ymoons) );
warn( "to %d moons.\n", ymoons );
}
}
image = imagecreate( width, drawheight );
if( (xmoons > 0) && (ymoons > 0) )
{
scarymonster( image, stars );
for( y = (drawheight/ymoons)/2; y < height; y += (drawheight/ymoons) )
{
for( x = (width/xmoons)/2; x < width; x += (width/xmoons) )
{
mooncopy( image, moon, x, y, black );
}
}
}
else
{
scarymonster( image, stars * 2 );
}
if( southern )
{
imageflip( image );
}
if( bgcolor )
{
palette[0] = hex2col( bgcolor, "background" );
}
if( fgcolor )
{
palette[1] = hex2col( fgcolor, "foreground" );
}
pngwrite( image, filename, height, (png_colorp) &palette[0] );
imagedestroy( image );
moondestroy( moon );
return 0;
}
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