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/* Hello, Emacs, this is -*-C-*- */

/* GNUPLOT - pbm.trm */

/*[

* Permission to use, copy, and distribute this software and its

* documentation for any purpose with or without fee is hereby granted,

* provided that the above copyright notice appear in all copies and

* that both that copyright notice and this permission notice appear

* in supporting documentation.

* Permission to modify the software is granted, but not the right to

* distribute the complete modified source code. Modifications are to

* be distributed as patches to the released version. Permission to

* distribute binaries produced by compiling modified sources is granted,

* provided you

* 1. distribute the corresponding source modifications from the

* released version in the form of a patch file along with the binaries,

* 2. add special version identification to distinguish your version

* in addition to the base release version number,

* 3. provide your name and address as the primary contact for the

* support of your modified version, and

* 4. retain our contact information in regard to use of the base

* software.

* Permission to distribute the released version of the source code along

* with corresponding source modifications in the form of a patch file is

* granted with same provisions 2 through 4 for binary distributions.

* This software is provided "as is" without express or implied warranty

* to the extent permitted by applicable law.

]*/

* This file is included by ../term.c.

* This terminal driver supports:

* pbm

* AUTHORS

* Russell Lang

* send your comments or suggestions to (gnuplot-info@lists.sourceforge.net).

/* The following pbmplus drivers use the generic bit mapped graphics

routines from bitmap.c to build up a bit map in memory. The driver

interchanges columns and lines in order to access entire lines

easily and returns the lines to get bits in the right order :

(x,y) -> (y,XMAX-1-x). */

/* This interchange is done by calling b_makebitmap() with reversed

xmax and ymax, and then setting b_rastermode to TRUE. b_setpixel()

will then perform the interchange before each pixel is plotted */

/* See Jef Poskanzer's excellent PBMplus package for more details of

the Portable BitMap format and for programs to convert PBM files

to other bitmap formats. */

#include "driver.h"

#ifdef TERM_REGISTER

register_term(pbm_driver)

#endif

#ifdef TERM_PROTO

TERM_PUBLIC void PBM_options(void);

TERM_PUBLIC void PBM_init(void);

TERM_PUBLIC void PBM_reset(void);

TERM_PUBLIC void PBM_setfont(void);

TERM_PUBLIC void PBM_graphics(void);

TERM_PUBLIC void PBM_monotext(void);

TERM_PUBLIC void PBM_graytext(void);

TERM_PUBLIC void PBM_colortext(void);

TERM_PUBLIC void PBM_text(void);

TERM_PUBLIC void PBM_linetype(int linetype);

TERM_PUBLIC void PBM_set_color(t_colorspec *color);

TERM_PUBLIC void PBM_point(unsigned int x, unsigned int y, int point);

#endif /* TERM_PROTO */

/* make XMAX+1 and YMAX+1 a multiple of 8 */

#define PBM_XMAX (640-1)

#define PBM_YMAX (480-1)

#define PBM_VCHAR (FNT5X9_VCHAR)

#define PBM_HCHAR (FNT5X9_VCHAR)

#define PBM_VTIC FNT5X9_HBITS

#define PBM_HTIC FNT5X9_HBITS

#ifdef TERM_BODY

/* 7=black, 0=white */

static int pgm_gray[] = { 7, 1, 6, 5, 4, 3, 2, 1, 7 }; /* grays */

/* bit3=!intensify, bit2=!red, bit1=!green, bit0=!blue */

static int ppm_color[] ={ 15, 8, 3, 5, 6, 2, 4, 1, 11, 13, 14 }; /* colors */

enum PBM_id {

PBM_SMALL, PBM_MEDIUM, PBM_LARGE,

PBM_MONOCHROME, PBM_GRAY, PBM_COLOR, PBM_SIZE,

PBM_OTHER

};

static int pbm_font = 1; /* small font */

static int pbm_mode = PBM_MONOCHROME;

static struct gen_table PBM_opts[] =

{

{ "s$mall", PBM_SMALL },

{ "me$dium", PBM_MEDIUM },

{ "l$arge", PBM_LARGE },

{ "mo$nochrome", PBM_MONOCHROME },

{ "g$ray", PBM_GRAY },

{ "c$olor", PBM_COLOR },

{ "c$olour", PBM_COLOR },

{ "size", PBM_SIZE },

{ NULL, PBM_OTHER }

};

TERM_PUBLIC void

PBM_options()

{

while (!END_OF_COMMAND) {

switch (lookup_table(&PBM_opts[0], c_token)) {

case PBM_SMALL:

pbm_font = 1;

c_token++;

break;

case PBM_MEDIUM:

pbm_font = 2;

c_token++;

break;

case PBM_LARGE:

pbm_font = 3;

c_token++;

break;

case PBM_MONOCHROME:

pbm_mode = PBM_MONOCHROME;

term->flags |= TERM_MONOCHROME;

c_token++;

break;

case PBM_GRAY:

pbm_mode = PBM_GRAY;

term->flags &= ~TERM_MONOCHROME;

c_token++;

break;

case PBM_COLOR:

pbm_mode = PBM_COLOR;

term->flags &= ~TERM_MONOCHROME;

c_token++;

break;

case PBM_SIZE: {

float width, height;

c_token++;

parse_term_size(&width, &height, PIXELS);

if (width > 0 && height > 0) {

term->xmax = width - 1;

term->ymax = height - 1;

}

break;

}

case PBM_OTHER:

default:

int_error(c_token, "unknown option");

break;

}

term->v_tic = (term->xmax < term->ymax) ? term->xmax/100 : term->ymax/100;

if (term->v_tic < 1)

term->v_tic = 1;

term->h_tic = term->v_tic;

/* setup options string */

switch (pbm_font) {

case 1:

strcat(term_options, "small");

break;

case 2:

strcat(term_options, "medium");

break;

case 3:

strcat(term_options, "large");

break;

}

switch (pbm_mode) {

case PBM_MONOCHROME:

strcat(term_options, " monochrome");

break;

case PBM_GRAY:

strcat(term_options, " gray");

break;

case PBM_COLOR:

strcat(term_options, " color");

break;

}

sprintf(term_options + strlen(term_options), " size %d,%d",

term->xmax + 1, term->ymax + 1);

}

TERM_PUBLIC void

PBM_init()

{

PBM_setfont(); /* HBB 980226: call it here! */

}

TERM_PUBLIC void

PBM_reset()

{

fflush_binary(); /* Only needed for VMS */

}

TERM_PUBLIC void

PBM_setfont()

{

switch (pbm_font) {

case 1:

b_charsize(FNT5X9);

term->v_char = FNT5X9_VCHAR;

term->h_char = FNT5X9_HCHAR;

break;

case 2:

b_charsize(FNT9X17);

term->v_char = FNT9X17_VCHAR;

term->h_char = FNT9X17_HCHAR;

break;

case 3:

b_charsize(FNT13X25);

term->v_char = FNT13X25_VCHAR;

term->h_char = FNT13X25_HCHAR;

break;

}

TERM_PUBLIC void

PBM_graphics()

{

int numplanes = 1;

unsigned int xpixels = term->xmax + 1;

unsigned int ypixels = term->ymax + 1;

switch (pbm_mode) {

case PBM_GRAY:

numplanes = 3;

break;

case PBM_COLOR:

numplanes = 4;

break;

}

/* HBB 980226: this is not the right place to do this: setfont() influences

* fields of the termtable entry, and therefore must be called by init()

* already. */

/* PBMsetfont(); */

/* rotate plot -90 degrees by reversing XMAX and YMAX and by

setting b_rastermode to TRUE */

b_makebitmap(ypixels, xpixels, numplanes);

b_rastermode = TRUE;

if (pbm_mode != PBM_MONOCHROME)

b_setlinetype(0); /* solid lines */

}

static void

PBM_monotext()

{

fputs("P4\n", gpoutfile);

fprintf(gpoutfile, "%u %u\n", b_ysize, b_xsize);

/* dump bitmap in raster mode */

for (x = b_xsize - 1; x >= 0; x--) {

row = (b_ysize / 8) - 1;

for (j = row; j >= 0; j--) {

(void) fputc((char) (*((*b_p)[j] + x)), gpoutfile);

}

b_freebitmap();

}

static void

PBM_graytext()

{

int mask, plane1, plane2, plane3;

fprintf(gpoutfile, "\

P5\n\

%u %u\n\

%u\n",

b_ysize, b_xsize,

255);

/* dump bitmap in raster mode */

for (x = b_xsize - 1; x >= 0; x--) {

row = (b_ysize / 8) - 1;

for (j = row; j >= 0; j--) {

mask = 0x80;

plane1 = (*((*b_p)[j] + x));

plane2 = (*((*b_p)[j + b_psize] + x));

plane3 = (*((*b_p)[j + b_psize + b_psize] + x));

for (i = 0; i < 8; i++) {

/* HBB: The values below are set to span the full range

* from 0 up to 255 in 7 steps: */

value = 255;

if (plane1 & mask)

value -= 36;

if (plane2 & mask)

value -= 73;

if (plane3 & mask)

value -= 146;

(void) fputc((char) (value), gpoutfile);

mask >>= 1;

}

b_freebitmap();

}

static void

PBM_colortext()

{

int mask, plane1, plane2, plane3, plane4;

int red, green, blue;

fprintf(gpoutfile, "P6\n\

%u %u\n\

%u\n",

b_ysize, b_xsize,

255);

/* dump bitmap in raster mode */

for (x = b_xsize - 1; x >= 0; x--) {

row = (b_ysize / 8) - 1;

for (j = row; j >= 0; j--) {

mask = 0x80;

plane1 = (*((*b_p)[j] + x));

plane2 = (*((*b_p)[j + b_psize] + x));

plane3 = (*((*b_p)[j + b_psize + b_psize] + x));

plane4 = (*((*b_p)[j + b_psize + b_psize + b_psize] + x));

for (i = 0; i < 8; i++) {

red = (plane3 & mask) ? 1 : 3;

green = (plane2 & mask) ? 1 : 3;

blue = (plane1 & mask) ? 1 : 3;

if (plane4 & mask) {

red--;

green--;

blue--;

}

/* HBB: '85' is exactly 255/3, so this spans the full

* range of colors in three steps: */

(void) fputc((char) (red * 85), gpoutfile);

(void) fputc((char) (green * 85), gpoutfile);

(void) fputc((char) (blue * 85), gpoutfile);

mask >>= 1;

}

b_freebitmap();

}

TERM_PUBLIC void

PBM_text()

{

switch (pbm_mode) {

case PBM_MONOCHROME:

PBM_monotext();

break;

case PBM_GRAY:

PBM_graytext();

break;

case PBM_COLOR:

PBM_colortext();

break;

}

TERM_PUBLIC void

PBM_linetype(int linetype)

{

if (pbm_mode == PBM_MONOCHROME) {

b_setvalue(1);

b_setlinetype(linetype >= -2 ? linetype : LT_BLACK);

} else {

t_colorspec color;

color.type = TC_LT;

color.lt = linetype;

PBM_set_color(&color);

b_setlinetype(0);

}

TERM_PUBLIC void

PBM_set_color(t_colorspec *color)

{

switch (color->type) {

case TC_LT: {

int linetype = color->lt;

if (linetype == LT_BACKGROUND)

b_setvalue(0);

else switch (pbm_mode) {

case PBM_MONOCHROME:

b_setvalue(1);

break;

case PBM_GRAY:

if (linetype >= 7)

linetype %= 7;

b_setvalue(pgm_gray[linetype + 2]);

break;

case PBM_COLOR:

if (linetype >= 9)

linetype %= 9;

b_setvalue(ppm_color[linetype + 2]);

break;

}

break;

}

case TC_RGB:

case TC_FRAC: {

rgb255_color rgb255;

if (color->type == TC_FRAC) {

rgb255maxcolors_from_gray(color->value, &rgb255);

} else {

rgb255.r = (color->lt >> 16) & 0xff;

rgb255.g = (color->lt >> 8) & 0xff;

rgb255.b = (color->lt >> 0) & 0xff;

}

switch (pbm_mode) {

case PBM_MONOCHROME:

b_setvalue(1);

break;

case PBM_GRAY: {

unsigned char gray = (unsigned)(rgb255.r * 0.30 + rgb255.g * 0.59 + rgb255.b * 0.11);

gray = (gray + 4) >> 3;

b_setvalue(gray);

break;

}

case PBM_COLOR: {

unsigned char val = 0x0f;

rgb255.r = (rgb255.r + 43) / 85;

rgb255.g = (rgb255.g + 43) / 85;

rgb255.b = (rgb255.b + 43) / 85;

if (rgb255.r > 1) val &= ~0x04;

if (rgb255.g > 1) val &= ~0x02;

if (rgb255.b > 1) val &= ~0x01;

if ((rgb255.r == 3) || (rgb255.g == 3) || (rgb255.b == 3))

val &= ~0x08;

b_setvalue(val);

break;

}

break;

}

default:

// should never happen

break;

}

TERM_PUBLIC void

PBM_point(unsigned int x, unsigned int y, int point)

{

unsigned int mask = b_linemask;

b_setlinetype(0); /* solid lines */

do_point(x, y, point);

b_linemask = mask;

b_maskcount = 0;

}

#endif /* TERM_BODY */

#ifdef TERM_TABLE

TERM_TABLE_START(pbm_driver)

"pbm", "Portable bitmap [small medium large] [monochrome gray color]",

PBM_XMAX, PBM_YMAX, PBM_VCHAR,

PBM_HCHAR, PBM_VTIC, PBM_HTIC, PBM_options,

PBM_init, PBM_reset, PBM_text, null_scale,

PBM_graphics, b_move, b_vector, PBM_linetype,

b_put_text, b_text_angle, b_justify_text, PBM_point,

do_arrow, set_font_null,

0, /* pointsize */

TERM_CAN_MULTIPLOT | TERM_BINARY,

0, 0, b_boxfill,

b_linewidth,

#ifdef USE_MOUSE

NULL, NULL, NULL, NULL, NULL,

#endif

NULL /* make_palette */, NULL, PBM_set_color,

b_filled_polygon,

NULL, /* image */

NULL, NULL, NULL, /* enhanced text */

NULL,

0.,

NULL,

NULL, /* boxed_text */

NULL,

b_dashtype

TERM_TABLE_END(pbm_driver)

#undef LAST_TERM

#define LAST_TERM pbm_driver

#endif /* TERM_TABLE */

#ifdef TERM_HELP

START_HELP(pbm)

"1 pbm",

"?commands set terminal pbm",

"?set terminal pbm",

"?set term pbm",

"?terminal pbm",

"?term pbm",

"?pbm",

" Note: only available if gnuplot is configured --with-bitmap-terminals.",

" Syntax:",

" set terminal pbm {<fontsize>} {<mode>} {size <x>,<y>}",

"",

" where <fontsize> is `small`, `medium`, or `large` and <mode> is `monochrome`,",

" `gray` or `color`. The default plot size is 640 pixels wide and 480 pixels",

" high. The output size is white-space padded to the nearest multiple of",

" 8 pixels on both x and y. This empty space may be cropped later if needed.",

"",

" The output of the `pbm` driver depends upon <mode>: `monochrome` produces a",

" portable bitmap (one bit per pixel), `gray` a portable graymap (three bits",

" per pixel) and `color` a portable pixmap (color, four bits per pixel).",

"",

" The output of this driver can be used with various image conversion and",

" manipulation utilities provided by NETPBM. Based on Jef Poskanzer's",

" PBMPLUS package, NETPBM provides programs to convert the above PBM formats",

" to GIF, TIFF, MacPaint, Macintosh PICT, PCX, X11 bitmap and many others.",

" Complete information is available at http://netpbm.sourceforge.net/.",

"",

" Examples:",

" set terminal pbm small monochrome # defaults",

" set terminal pbm color medium size 800,600",

" set output '| pnmrotate 45 | pnmtopng > tilted.png' # uses NETPBM"

END_HELP(pbm)

#endif /* TERM_HELP */

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