getbob.c File Reference

#include "starbase.c.h"
#include <stdio.h>
#include <math.h>
#include <fcntl.h>
#include "rle.h"

Include dependency graph for getbob.c:

Go to the source code of this file.

Macros
#define	TRUE   1 /* Logical constants. */
#define	FALSE   0
#define	MAX(i, j)    ( (i) > (j) ? (i) : (j) )
#define	RASTERSIZE_LIM   1023
#define	COLMAP_OFFSET   8
#define	MONOCHROME_MODE   1
#define	EIGHT_BIT_COLOR_MODE   2
#define	DMAP(v, x, y)   (errN[v]>dm16[x][y] ? divN[v] + 1 : divN[v])

Typedefs
typedef char *	string
typedef int	boolean
typedef float	single
typedef single	starbase_color_type[3]
typedef unsigned char	starbase_color_index_type

Functions
	main (int argc, argv)
	init_gamma_map ()
	init_8_bit_color_map ()
	init_monochrome_color_map (int ncolors)
	put_line_8 (int y)
	put_line_mono (int y)
	direct_setup ()
	write_color_map (int star_fd)
	write_scanline (int y)

Variables
unsigned char	scanline [4][1023]
unsigned char *	rows [4]
starbase_color_index_type	dest_pixels [1023]
int	dm16 [16][16]
int	errN [256]
int	divN [256]
int	gammamap [256]
float	gam = 2.0
string	infname = ((void *)0)
rle_hdr	hdr
boolean	linear_flag = 0
boolean	gamma_flag = 0
boolean	dummy
string	display_name = "/dev/crt"
string	driver_name = "hp98705"
boolean	pos_flag
int	pic_x = 0
int	pic_y = 0
int	dev_color_map_size
int	put_mode
int	n_colmap_colors
static starbase_color_type	colmap [216]
float	r_base_color = 1.0
float	g_base_color = 1.0
float	b_base_color = 1.0
int	picture_fd

Macro Definition Documentation

#define COLMAP_OFFSET   8

Definition at line 45 of file getbob.c.

#define DMAP	(		v,
			x,
			y
	)		(errN[v]>dm16[x][y] ? divN[v] + 1 : divN[v])

Definition at line 240 of file getbob.c.

#define EIGHT_BIT_COLOR_MODE   2

Definition at line 49 of file getbob.c.

#define FALSE   0

Definition at line 33 of file getbob.c.

#define MAX	(		i,
			j
	)		( (i) > (j) ? (i) : (j) )

Definition at line 35 of file getbob.c.

#define MONOCHROME_MODE   1

Definition at line 48 of file getbob.c.

#define RASTERSIZE_LIM   1023

Definition at line 42 of file getbob.c.

#define TRUE   1 /* Logical constants. */

Definition at line 32 of file getbob.c.

Typedef Documentation

typedef int boolean

Definition at line 31 of file getbob.c.

typedef float single

Definition at line 34 of file getbob.c.

typedef unsigned char starbase_color_index_type

Definition at line 40 of file getbob.c.

typedef single starbase_color_type[3]

Definition at line 39 of file getbob.c.

typedef char* string

Definition at line 30 of file getbob.c.

Function Documentation

direct_setup

(

)

Definition at line 399 of file getbob.c.

References hdr, pic_x, pic_y, picture_fd, put_mode, rle_hdr::xmax, and rle_hdr::ymax.

{
    single p_lim[2][3], res[3], p1[3], p2[3];
    int map_size;
    int dev_xmax, dev_ymax;

    picture_fd = gopen( display_name, OUTDEV, driver_name, 0 );
    if ( picture_fd < 0 )
    {
    fprintf( stderr, "Can't open device.\n" );
    exit( 1 );
    }

    /* Find out info about this device. */
    inquire_sizes( picture_fd, p_lim, res, p1, p2, &map_size );

    if ( map_size >= 256 )
    {
    put_mode = EIGHT_BIT_COLOR_MODE;
    init_8_bit_color_map();
    }
    else
    {
    put_mode = MONOCHROME_MODE;
    init_monochrome_color_map( map_size - COLMAP_OFFSET );
    }

    write_color_map( picture_fd );

    /* Set the screen limits in pixels so we can use starbase in a device
     * independent way.
     *
     * It is assumed that the p_lim values returned by inquire_sizes are the
     * lower left screen coordinates in (float) pixels and the upper right
     * screen coordinates in (float) pixels.  It is also assumed that the
     * range of values in x and y coordinates are given from 0 to some
     * positive maximum value.
     */
    dev_xmax = MAX( p_lim[0][0], p_lim[1][0] );
    dev_ymax = MAX( p_lim[0][1], p_lim[1][1] );

    if ( hdr.xmax > dev_xmax )
    hdr.xmax = dev_xmax;
    if ( hdr.ymax > dev_ymax )
    hdr.ymax = dev_ymax;

    /* Make sure that the specified lower left hand corner of the image
     * will keep the image in bounds.
     */
    if ( ( hdr.xmax + pic_x ) > dev_xmax )
    pic_x = dev_xmax - hdr.xmax;
    if ( ( hdr.ymax + pic_y ) > dev_ymax )
    pic_y = dev_ymax - hdr.ymax;

    /* Set to use the whole display surface. */
    mapping_mode( picture_fd, DISTORT );

    /* Set to address the pixels in a device independent way. */
    vdc_extent( picture_fd, 0.0, 0.0, 0.0,
        (single)dev_xmax, (single)dev_ymax, 0.0 );
    clip_rectangle( picture_fd, 0.0, (single)dev_xmax, 0.0, (single)dev_ymax );

}

init_8_bit_color_map

(

)

Definition at line 187 of file getbob.c.

References colmap, divN, dm16, errN, make_square(), and n_colmap_colors.

{
    int i;

    /* 
     * Set up the color map entries.  We will use 216 colors.
     */
    n_colmap_colors = 216;      /* Fill out the global. */

    for ( i = 0; i < n_colmap_colors; i++ )
    {
    colmap[i][0] = ((i%6) * 51) / 255.0;
    colmap[i][1] = (((i/6)%6) * 51) / 255.0;
    colmap[i][2] = (((i/36)%6) * 51) / 255.0;
    }

    make_square( 6.0, divN, errN, dm16 );
}

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init_gamma_map

(

)

Definition at line 165 of file getbob.c.

References gam, gammamap, and linear_flag.

{
    int i;

    /* Compute a gamma correction map. */
    for ( i = 0; i < 256; i++ )
    {
    if ( ! linear_flag )
    {
        gammamap[i] = (int)(0.5 + 255 * pow( i / 255.0, 1.0/gam ));
    }
    }
}

init_monochrome_color_map

(

int

ncolors

)

Definition at line 217 of file getbob.c.

{
    int k;
    int color_val;

    /* Set up the color map entries into a single grayscale ramp. */
    n_colmap_colors = ncolors;      /* Fill out the global. */

    for ( k = 0; k < ncolors; k++ )
   {
    color_val = (k * 255) / (ncolors - 1);
    colmap[k][0] = (color_val * r_base_color) / 255.;
    colmap[k][1] = (color_val * g_base_color) / 255.;
    colmap[k][2] = (color_val * b_base_color) / 255.;
    }

    /* Make dithering tables. */
    make_square( (double)ncolors, divN, errN, dm16 );
}

main	(	int	argc,
		argv
	)

Definition at line 107 of file getbob.c.

{
    int i;
    int row;
     boolean bw_flag = FALSE;

    /* sbrk( 1000000 ); */

    /* Get command line arguments. */
    if ( scanargs( argc, argv,
    "getbob l%- g%-gamma!f p%-pos!d!d d%-display!s x%-driver!s file%s",
           &linear_flag, &gamma_flag, &gam,
           &pos_flag, &pic_x, &pic_y,
           &dummy, &display_name,
           &dummy, &driver_name,
           &infname )  == 0 )
    exit( 1 );

    /* Open file for reading, if no filename was specified, we'll read
     * from stdin.
     */
    hdr = *rle_hdr_init( (rle_hdr *)NULL );
    rle_names( &hdr, cmd_name( argv ), infname, 0 );
    hdr.rle_file = rle_open_f(hdr.cmd, infname, "r");
    /* Read header information from rle file. */
    rle_get_setup_ok( &hdr, NULL, NULL );

    RLE_CLR_BIT( hdr, RLE_ALPHA );  /* No alpha channel */

    /* Set up gamma correction tables if need be. */
    init_gamma_map();

    direct_setup();

    /* Set up rows to point to our copy of the scanline */
    for ( i= 0; i < 4; i++ )
    rows[i] = scanline[i];

    /* Get the scanlines. */
    for (i = hdr.ymin; i < hdr.ymax; i++)
    {
    rle_getrow( &hdr, rows );
    if ( put_mode == MONOCHROME_MODE )
        put_line_mono( i );
    else
        put_line_8( i );
    }
}

put_line_8

(

int

y

)

Definition at line 248 of file getbob.c.

{
    register unsigned char *r, *g, *b;
    register int i, dither_col, dither_row;
    register starbase_color_index_type *dest_pixel_ptr;
    int xmax = hdr.xmax;
    int g_offset, b_offset;
    

    /* In case we have less than 3 color channels. */
    for (i = 2; i >= hdr.ncolors; i--)
    bcopy(rows[0], rows[i], hdr.xmax - hdr.xmin);

    dither_row = y % 16;
    dither_col = 0;
    r = rows[0];
    g = rows[1];
    b = rows[2];
    dest_pixel_ptr = &dest_pixels[0];

    /* Linear map. */
    if ( linear_flag )
    for ( i = 0; i < xmax; i++, r++, g++, b++,
                       dither_col = ((dither_col + 1) & 15),
                       dest_pixel_ptr++ )
        *dest_pixel_ptr =
        DMAP( *r, dither_col, dither_row ) +
        DMAP( *g, dither_col, dither_row ) * 6 +
        DMAP( *b, dither_col, dither_row ) * 36 +
        COLMAP_OFFSET;

    /* RLE file with color map. */
    else if ( hdr.ncmap )
    {
    /* Compute offsets to the green and blue sections of the color map. */
    g_offset = 1 << hdr.cmaplen;
    b_offset = 2 * g_offset;

    for ( i = 0; i < xmax; i++, r++, g++, b++,
                       dither_col = ((dither_col + 1) & 15),
                       dest_pixel_ptr++ )
        *dest_pixel_ptr =
        DMAP( hdr.cmap[*r], dither_col, dither_row ) +
        DMAP( hdr.cmap[*g + g_offset],
                    dither_col, dither_row ) * 6 +
        DMAP( hdr.cmap[*b + b_offset],
                    dither_col, dither_row ) * 36 +
        COLMAP_OFFSET;
    }

    /* Gamma correction is the default. */
    else
    for ( i = 0; i < xmax; i++, r++, g++, b++,
                       dither_col = ((dither_col + 1) & 15),
                       dest_pixel_ptr++ )
        *dest_pixel_ptr =
        DMAP( gammamap[*r], dither_col, dither_row ) +
        DMAP( gammamap[*g], dither_col, dither_row ) * 6 +
        DMAP( gammamap[*b], dither_col, dither_row ) * 36 +
        COLMAP_OFFSET;

    /* Write this scanline to the device. */
    write_scanline( y );
}

put_line_mono

(

int

y

)

Definition at line 322 of file getbob.c.

{
    register unsigned char *r, *g, *b;
    register int i, dither_col, dither_row;
    register starbase_color_index_type *dest_pixel_ptr;
    int xmax = hdr.xmax;
    int bw_val;
    int g_offset, b_offset;

    /* In case we have less than 3 color channels. */
    for (i = 2; i >= hdr.ncolors; i--)
    bcopy(rows[0], rows[i], hdr.xmax - hdr.xmin);

    dither_row = y % 16;
    dither_col = 0;
    r = rows[0];
    g = rows[1];
    b = rows[2];
    dest_pixel_ptr = &dest_pixels[0];

    /* Linear map. */
    if ( linear_flag )
    for ( i = 0; i < xmax; i++, r++, g++, b++,
                       dither_col = ((dither_col + 1) & 15),
                       dest_pixel_ptr++ )
    {
        bw_val =
        (35*(*r) + 55*(*g) + 10*(*b)) / 100;
        *dest_pixel_ptr =
        DMAP( bw_val, dither_col, dither_row ) + COLMAP_OFFSET;
    }

    /* RLE file with color map. */
    else if ( hdr.ncmap )
    {
    /* Compute offsets to the green and blue sections of the color map. */
    g_offset = 1 << hdr.cmaplen;
    b_offset = 2 * g_offset;

    for ( i = 0; i < xmax; i++, r++, g++, b++,
                       dither_col = ((dither_col + 1) & 15),
                       dest_pixel_ptr++ )
    {
        bw_val =
        ( 35 * hdr.cmap[*r] +
          55 * hdr.cmap[*g + g_offset] +
          10 * hdr.cmap[*b + b_offset] ) / 100;
        *dest_pixel_ptr =
        DMAP( bw_val, dither_col, dither_row ) + COLMAP_OFFSET;
    }
    }

    /* Gamma correction is the default. */
    else
    for ( i = 0; i < xmax; i++, r++, g++, b++,
                       dither_col = ((dither_col + 1) & 15),
                       dest_pixel_ptr++ )
    {
        bw_val =
        (35*gammamap[*r] + 55*gammamap[*g] + 10*gammamap[*b]) / 100;
        *dest_pixel_ptr =
        DMAP( bw_val, dither_col, dither_row ) + COLMAP_OFFSET;
    }

    /* Write this scanline to the device. */
    write_scanline( y );
}

write_color_map

(

int

star_fd

)

Definition at line 472 of file getbob.c.

{
    define_color_table( star_fd, COLMAP_OFFSET, n_colmap_colors, colmap );

}

write_scanline

(

int

y

)

Definition at line 488 of file getbob.c.

{
    block_write( picture_fd,
           (single)(hdr.xmin + pic_x), (single)(y + pic_y),
           hdr.xmax - hdr.xmin, 1,
           dest_pixels, FALSE );
}

Variable Documentation

float b_base_color = 1.0

Definition at line 101 of file getbob.c.

starbase_color_type colmap[216]

static

Definition at line 96 of file getbob.c.

Referenced by init_8_bit_color_map().

starbase_color_index_type dest_pixels[1023]

Definition at line 55 of file getbob.c.

int dev_color_map_size

Definition at line 89 of file getbob.c.

string display_name = "/dev/crt"

Definition at line 80 of file getbob.c.

int divN[256]

Definition at line 61 of file getbob.c.

int dm16[16][16]

Definition at line 58 of file getbob.c.

string driver_name = "hp98705"

Definition at line 81 of file getbob.c.

boolean dummy

Definition at line 77 of file getbob.c.

int errN[256]

Definition at line 61 of file getbob.c.

Referenced by init_8_bit_color_map(), init_8_bit_colour_map(), and init_monochrome_colour_map().

float g_base_color = 1.0

Definition at line 100 of file getbob.c.

float gam = 2.0

Definition at line 65 of file getbob.c.

Referenced by borrow_color_map(), init_gamma_map(), and window_color_map().

boolean gamma_flag = 0

Definition at line 75 of file getbob.c.

int gammamap[256]

Definition at line 64 of file getbob.c.

rle_hdr hdr

Definition at line 71 of file getbob.c.

string infname = ((void *)0)

Definition at line 68 of file getbob.c.

boolean linear_flag = 0

Definition at line 74 of file getbob.c.

Referenced by init_gamma_map().

int n_colmap_colors

Definition at line 95 of file getbob.c.

Referenced by init_8_bit_color_map().

int pic_x = 0

Definition at line 85 of file getbob.c.

Referenced by direct_setup().

int pic_y = 0

Definition at line 86 of file getbob.c.

Referenced by direct_setup().

int picture_fd

Definition at line 104 of file getbob.c.

boolean pos_flag

Definition at line 84 of file getbob.c.

int put_mode

Definition at line 92 of file getbob.c.

Referenced by direct_setup().

float r_base_color = 1.0

Definition at line 99 of file getbob.c.

unsigned char * rows[4]

Definition at line 52 of file getbob.c.

unsigned char scanline[4][1023]

Definition at line 52 of file getbob.c.