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gimp/plug-ins/print/print-ps.c
Manish Singh 0820b13c74 0.99.31 fun 
updated print plugin

-Yosh
1998-05-17 07:16:50 +00:00

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/*
* "$Id$"
*
* Print plug-in Adobe PostScript driver for the GIMP.
*
* Copyright 1997-1998 Michael Sweet (mike@easysw.com)
*
* 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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Contents:
*
* ps_parameters() - Return the parameter values for the given
* parameter.
* ps_media_size() - Return the size of the page.
* ps_imageable_area() - Return the imageable area of the page.
* ps_print() - Print an image to a PostScript printer.
* ps_hex() - Print binary data as a series of hexadecimal numbers.
* ps_ascii85() - Print binary data as a series of base-85 numbers.
*
* Revision History:
*
* $Log$
* Revision 1.9 1998/05/17 07:16:47 yosh
* 0.99.31 fun
*
* updated print plugin
*
* -Yosh
*
* Revision 1.13 1998/05/15 21:01:51 mike
* Updated image positioning code (invert top and center left/top independently)
* Updated ps_imageable_area() to return a default imageable area when no PPD
* file is available.
*
* Revision 1.12 1998/05/11 23:56:56 mike
* Removed unused outptr variable.
*
* Revision 1.11 1998/05/08 19:20:50 mike
* Updated to support PPD files, media size, imageable area, and parameter
* functions.
* Added support for scaling modes - scale by percent or scale by PPI.
* Updated Ascii85 output - some Level 2 printers are buggy and won't accept
* whitespace in the data stream.
* Now use image dictionaries with Level 2 printers - allows interpolation
* flag to be sent (not all printers use this flag).
*
* Revision 1.10 1998/01/22 15:38:46 mike
* Updated copyright notice.
* Whoops - wasn't encoding correctly for portrait output to level 2 printers!
*
* Revision 1.9 1998/01/21 21:33:47 mike
* Added support for Level 2 filters; images are now sent in hex or
* base-85 ASCII as necessary (faster printing).
*
* Revision 1.8 1997/11/12 15:57:48 mike
* Minor changes for clean compiles under Digital UNIX.
*
* Revision 1.8 1997/11/12 15:57:48 mike
* Minor changes for clean compiles under Digital UNIX.
*
* Revision 1.7 1997/07/30 20:33:05 mike
* Final changes for 1.1 release.
*
* Revision 1.7 1997/07/30 20:33:05 mike
* Final changes for 1.1 release.
*
* Revision 1.6 1997/07/30 18:47:39 mike
* Added scaling, orientation, and offset options.
*
* Revision 1.5 1997/07/26 18:38:55 mike
* Bug - was using asctime instead of ctime... D'oh!
*
* Revision 1.4 1997/07/26 18:19:54 mike
* Fixed positioning/scaling bug.
*
* Revision 1.3 1997/07/03 13:26:46 mike
* Updated documentation for 1.0 release.
*
* Revision 1.2 1997/07/02 18:49:36 mike
* Forgot to free memory buffers...
*
* Revision 1.2 1997/07/02 18:49:36 mike
* Forgot to free memory buffers...
*
* Revision 1.1 1997/07/02 13:51:53 mike
* Initial revision
*/
#include "print.h"
#include <time.h>
/*#define DEBUG*/
/*
* Local variables...
*/
static FILE *ps_ppd = NULL;
static char *ps_ppd_file = NULL;
/*
* Local functions...
*/
static void ps_hex(FILE *, guchar *, int);
static void ps_ascii85(FILE *, guchar *, int, int);
static char *ppd_find(char *, char *, char *, int *);
/*
* 'ps_parameters()' - Return the parameter values for the given parameter.
*/
char ** /* O - Parameter values */
ps_parameters(int model, /* I - Printer model */
char *ppd_file, /* I - PPD file (not used) */
char *name, /* I - Name of parameter */
int *count) /* O - Number of values */
{
int i;
char line[1024],
lname[255],
loption[255];
char **valptrs;
static char *media_sizes[] =
{
"Letter",
"Legal",
"A4",
"Tabloid",
"A3",
"12x18"
};
if (count == NULL)
return (NULL);
*count = 0;
if (ppd_file == NULL || name == NULL)
return (NULL);
if (ps_ppd_file == NULL || strcmp(ps_ppd_file, ppd_file) != 0)
{
if (ps_ppd != NULL)
fclose(ps_ppd);
ps_ppd = fopen(ppd_file, "r");
if (ps_ppd == NULL)
ps_ppd_file = NULL;
else
ps_ppd_file = ppd_file;
};
if (ps_ppd == NULL)
{
if (strcmp(name, "PageSize") == 0)
{
*count = 6;
valptrs = g_new(char *, 6);
for (i = 0; i < 6; i ++)
valptrs[i] = strdup(media_sizes[i]);
return (valptrs);
}
else
return (NULL);
};
rewind(ps_ppd);
*count = 0;
valptrs = g_new(char *, 100);
while (fgets(line, sizeof(line), ps_ppd) != NULL)
{
if (line[0] != '*')
continue;
if (sscanf(line, "*%s %[^/:]", lname, loption) != 2)
continue;
if (strcasecmp(lname, name) == 0)
{
valptrs[*count] = strdup(loption);
(*count) ++;
};
};
if (*count == 0)
{
g_free(valptrs);
return (NULL);
}
else
return (valptrs);
}
/*
* 'ps_media_size()' - Return the size of the page.
*/
void
ps_media_size(int model, /* I - Printer model */
char *ppd_file, /* I - PPD file (not used) */
char *media_size, /* I - Media size */
int *width, /* O - Width in points */
int *length) /* O - Length in points */
{
char *dimensions; /* Dimensions of media size */
#ifdef DEBUG
printf("ps_media_size(%d, \'%s\', \'%s\', %08x, %08x)\n", model, ppd_file,
media_size, width, length);
#endif /* DEBUG */
if ((dimensions = ppd_find(ppd_file, "PaperDimension", media_size, NULL)) != NULL)
sscanf(dimensions, "%d%d", width, length);
else
default_media_size(model, ppd_file, media_size, width, length);
}
/*
* 'ps_imageable_area()' - Return the imageable area of the page.
*/
void
ps_imageable_area(int model, /* I - Printer model */
char *ppd_file, /* I - PPD file (not used) */
char *media_size, /* I - Media size */
int *left, /* O - Left position in points */
int *right, /* O - Right position in points */
int *bottom, /* O - Bottom position in points */
int *top) /* O - Top position in points */
{
char *area; /* Imageable area of media */
float fleft, /* Floating point versions */
fright,
fbottom,
ftop;
if ((area = ppd_find(ppd_file, "ImageableArea", media_size, NULL)) != NULL)
{
#ifdef DEBUG
printf("area = \'%s\'\n", area);
#endif /* DEBUG */
if (sscanf(area, "%f%f%f%f", &fleft, &fbottom, &fright, &ftop) == 4)
{
*left = (int)fleft;
*right = (int)fright;
*bottom = (int)fbottom;
*top = (int)ftop;
}
else
*left = *right = *bottom = *top = 0;
}
else
{
default_media_size(model, ppd_file, media_size, right, top);
*left = 18;
*right -= 18;
*top -= 36;
*bottom = 36;
};
}
/*
* 'ps_print()' - Print an image to a PostScript printer.
*/
void
ps_print(int model, /* I - Model (Level 1 or 2) */
char *ppd_file, /* I - PPD file */
char *resolution, /* I - Resolution */
char *media_size, /* I - Media size */
char *media_type, /* I - Media type */
char *media_source, /* I - Media source */
int output_type, /* I - Output type (color/grayscale) */
int orientation, /* I - Orientation of image */
float scaling, /* I - Scaling of image */
int left, /* I - Left offset of image (points) */
int top, /* I - Top offset of image (points) */
int copies, /* I - Number of copies */
FILE *prn, /* I - File to print to */
GDrawable *drawable, /* I - Image to print */
guchar *lut, /* I - Brightness lookup table */
guchar *cmap) /* I - Colormap (for indexed images) */
{
int i, j; /* Looping vars */
int x, y; /* Looping vars */
GPixelRgn rgn; /* Image region */
guchar *in, /* Input pixels from image */
*out; /* Output pixels for printer */
int page_left, /* Left margin of page */
page_right, /* Right margin of page */
page_top, /* Top of page */
page_bottom, /* Bottom of page */
page_width, /* Width of page */
page_height, /* Height of page */
out_width, /* Width of image on page */
out_height, /* Height of image on page */
out_bpp, /* Output bytes per pixel */
out_length, /* Output length (Level 2 output) */
out_offset, /* Output offset (Level 2 output) */
temp_width, /* Temporary width of image on page */
temp_height, /* Temporary height of image on page */
landscape; /* True if we rotate the output 90 degrees */
time_t curtime; /* Current time of day */
convert_t colorfunc; /* Color conversion function... */
char *command; /* PostScript command */
int order, /* Order of command */
num_commands; /* Number of commands */
struct /* PostScript commands... */
{
char *command;
int order;
} commands[4];
/*
* Setup a read-only pixel region for the entire image...
*/
gimp_pixel_rgn_init(&rgn, drawable, 0, 0, drawable->width, drawable->height,
FALSE, FALSE);
/*
* Choose the correct color conversion function...
*/
if (drawable->bpp < 3 && cmap == NULL)
output_type = OUTPUT_GRAY; /* Force grayscale output */
if (output_type == OUTPUT_COLOR)
{
out_bpp = 3;
if (drawable->bpp >= 3)
colorfunc = rgb_to_rgb;
else
colorfunc = indexed_to_rgb;
}
else
{
out_bpp = 1;
if (drawable->bpp >= 3)
colorfunc = rgb_to_gray;
else if (cmap == NULL)
colorfunc = gray_to_gray;
else
colorfunc = indexed_to_gray;
};
/*
* Compute the output size...
*/
landscape = 0;
ps_imageable_area(model, ppd_file, media_size, &page_left, &page_right,
&page_bottom, &page_top);
page_width = page_right - page_left;
page_height = page_top - page_bottom;
#ifdef DEBUG
printf("page_width = %d, page_height = %d\n", page_width, page_height);
printf("drawable->width = %d, drawable->height = %d\n", drawable->width, drawable->height);
printf("scaling = %.1f\n", scaling);
#endif /* DEBUG */
/*
* Portrait width/height...
*/
if (scaling < 0.0)
{
/*
* Scale to pixels per inch...
*/
out_width = drawable->width * -72.0 / scaling;
out_height = drawable->height * -72.0 / scaling;
}
else
{
/*
* Scale by percent...
*/
out_width = page_width * scaling / 100.0;
out_height = out_width * drawable->height / drawable->width;
if (out_height > page_height)
{
out_height = page_height * scaling / 100.0;
out_width = out_height * drawable->width / drawable->height;
};
};
/*
* Landscape width/height...
*/
if (scaling < 0.0)
{
/*
* Scale to pixels per inch...
*/
temp_width = drawable->height * -72.0 / scaling;
temp_height = drawable->width * -72.0 / scaling;
}
else
{
/*
* Scale by percent...
*/
temp_width = page_width * scaling / 100.0;
temp_height = temp_width * drawable->width / drawable->height;
if (temp_height > page_height)
{
temp_height = page_height;
temp_width = temp_height * drawable->height / drawable->width;
};
};
/*
* See which orientation has the greatest area (or if we need to rotate the
* image to fit it on the page...)
*/
if (orientation == ORIENT_AUTO)
{
if (scaling < 0.0)
{
if ((out_width > page_width && out_height < page_width) ||
(out_height > page_height && out_width < page_height))
orientation = ORIENT_LANDSCAPE;
else
orientation = ORIENT_PORTRAIT;
}
else
{
if ((temp_width * temp_height) > (out_width * out_height))
orientation = ORIENT_LANDSCAPE;
else
orientation = ORIENT_PORTRAIT;
};
};
if (orientation == ORIENT_LANDSCAPE)
{
out_width = temp_width;
out_height = temp_height;
landscape = 1;
/*
* Swap left/top offsets...
*/
x = top;
top = left;
left = x;
};
/*
* Let the user know what we're doing...
*/
gimp_progress_init("Printing...");
/*
* Output a standard PostScript header with DSC comments...
*/
curtime = time(NULL);
if (left < 0)
left = (page_width - out_width) / 2 + page_left;
if (top < 0)
top = (page_height + out_height) / 2 + page_bottom;
else
top = page_height - top + page_bottom;
#ifdef DEBUG
printf("out_width = %d, out_height = %d\n", out_width, out_height);
printf("page_left = %d, page_right = %d, page_bottom = %d, page_top = %d\n",
page_left, page_right, page_bottom, page_top);
printf("left = %d, top = %d\n", left, top);
#endif /* DEBUG */
fputs("%!PS-Adobe-3.0\n", prn);
fputs("%%Creator: " PLUG_IN_NAME " plug-in V" PLUG_IN_VERSION " for GIMP.\n", prn);
fprintf(prn, "%%%%CreationDate: %s", ctime(&curtime));
fputs("%%Copyright: 1997-1998 by Michael Sweet (mike@easysw.com)\n", prn);
fprintf(prn, "%%%%BoundingBox: %d %d %d %d\n",
left, top - out_height, left + out_width, top);
fputs("%%DocumentData: Clean7Bit\n", prn);
fprintf(prn, "%%%%LanguageLevel: %d\n", model + 1);
fputs("%%Pages: 1\n", prn);
fputs("%%Orientation: Portrait\n", prn);
fputs("%%EndComments\n", prn);
/*
* Find any printer-specific commands...
*/
num_commands = 0;
if ((command = ppd_find(ppd_file, "PageSize", media_size, &order)) != NULL)
{
commands[num_commands].command = strdup(command);
commands[num_commands].order = order;
num_commands ++;
};
if ((command = ppd_find(ppd_file, "InputSlot", media_source, &order)) != NULL)
{
commands[num_commands].command = strdup(command);
commands[num_commands].order = order;
num_commands ++;
};
if ((command = ppd_find(ppd_file, "MediaType", media_type, &order)) != NULL)
{
commands[num_commands].command = strdup(command);
commands[num_commands].order = order;
num_commands ++;
};
if ((command = ppd_find(ppd_file, "Resolution", resolution, &order)) != NULL)
{
commands[num_commands].command = strdup(command);
commands[num_commands].order = order;
num_commands ++;
};
/*
* Sort the commands using the OrderDependency value...
*/
for (i = 0; i < (num_commands - 1); i ++)
for (j = i + 1; j < num_commands; j ++)
if (commands[j].order < commands[i].order)
{
order = commands[i].order;
command = commands[i].command;
commands[i].command = commands[j].command;
commands[i].order = commands[j].order;
commands[j].command = command;
commands[j].order = order;
};
/*
* Send the commands...
*/
if (num_commands > 0)
{
fputs("%%BeginProlog\n", prn);
for (i = 0; i < num_commands; i ++)
{
fputs(commands[i].command, prn);
free(commands[i].command);
};
fputs("%%EndProlog\n", prn);
};
/*
* Output the page, rotating as necessary...
*/
fputs("%%Page: 1\n", prn);
fputs("gsave\n", prn);
if (landscape)
{
fprintf(prn, "%d %d translate\n", left, top - out_height);
fprintf(prn, "%.3f %.3f scale\n",
(float)out_width / ((float)drawable->height),
(float)out_height / ((float)drawable->width));
}
else
{
fprintf(prn, "%d %d translate\n", left, top);
fprintf(prn, "%.3f %.3f scale\n",
(float)out_width / ((float)drawable->width),
(float)out_height / ((float)drawable->height));
};
in = g_malloc(drawable->width * drawable->bpp);
out = g_malloc(drawable->width * out_bpp + 3);
if (model == 0)
{
fprintf(prn, "/picture %d string def\n", drawable->width * out_bpp);
fprintf(prn, "%d %d 8\n", drawable->width, drawable->height);
if (landscape)
fputs("[ 0 1 1 0 0 0 ]\n", prn);
else
fputs("[ 1 0 0 -1 0 1 ]\n", prn);
if (output_type == OUTPUT_GRAY)
fputs("{currentfile picture readhexstring pop} image\n", prn);
else
fputs("{currentfile picture readhexstring pop} false 3 colorimage\n", prn);
for (y = 0; y < drawable->height; y ++)
{
if ((y & 15) == 0)
gimp_progress_update((double)y / (double)drawable->height);
gimp_pixel_rgn_get_row(&rgn, in, 0, y, drawable->width);
(*colorfunc)(in, out, drawable->width, drawable->bpp, lut, cmap);
ps_hex(prn, out, drawable->width * out_bpp);
};
}
else
{
if (output_type == OUTPUT_GRAY)
fputs("/DeviceGray setcolorspace\n", prn);
else
fputs("/DeviceRGB setcolorspace\n", prn);
fputs("<<\n", prn);
fputs("\t/ImageType 1\n", prn);
fprintf(prn, "\t/Width %d\n", drawable->width);
fprintf(prn, "\t/Height %d\n", drawable->height);
fputs("\t/BitsPerComponent 8\n", prn);
if (output_type == OUTPUT_GRAY)
fputs("\t/Decode [ 0 1 ]\n", prn);
else
fputs("\t/Decode [ 0 1 0 1 0 1 ]\n", prn);
fputs("\t/DataSource currentfile /ASCII85Decode filter\n", prn);
if ((drawable->width * 72 / out_width) < 100)
fputs("\t/Interpolate true\n", prn);
if (landscape)
fputs("\t/ImageMatrix [ 0 1 1 0 0 0 ]\n", prn);
else
fputs("\t/ImageMatrix [ 1 0 0 -1 0 1 ]\n", prn);
fputs(">>\n", prn);
fputs("image\n", prn);
for (y = 0, out_offset = 0; y < drawable->height; y ++)
{
if ((y & 15) == 0)
gimp_progress_update((double)y / (double)drawable->height);
gimp_pixel_rgn_get_row(&rgn, in, 0, y, drawable->width);
(*colorfunc)(in, out + out_offset, drawable->width, drawable->bpp, lut, cmap);
out_length = out_offset + drawable->width * out_bpp;
if (y < (drawable->height - 1))
{
ps_ascii85(prn, out, out_length & ~3, 0);
out_offset = out_length & 3;
}
else
{
ps_ascii85(prn, out, out_length, 1);
out_offset = 0;
};
if (out_offset > 0)
memcpy(out, out + out_length - out_offset, out_offset);
};
};
g_free(in);
g_free(out);
fputs("grestore\n", prn);
fputs("showpage\n", prn);
fputs("%%EndPage\n", prn);
fputs("%%EOF\n", prn);
}
/*
* 'ps_hex()' - Print binary data as a series of hexadecimal numbers.
*/
static void
ps_hex(FILE *prn, /* I - File to print to */
guchar *data, /* I - Data to print */
int length) /* I - Number of bytes to print */
{
int col; /* Current column */
static char *hex = "0123456789ABCDEF";
col = 0;
while (length > 0)
{
/*
* Put the hex chars out to the file; note that we don't use fprintf()
* for speed reasons...
*/
putc(hex[*data >> 4], prn);
putc(hex[*data & 15], prn);
data ++;
length --;
col = (col + 1) & 31;
if (col == 0)
putc('\n', prn);
};
if (col > 0)
putc('\n', prn);
}
/*
* 'ps_ascii85()' - Print binary data as a series of base-85 numbers.
*/
static void
ps_ascii85(FILE *prn, /* I - File to print to */
guchar *data, /* I - Data to print */
int length, /* I - Number of bytes to print */
int last_line) /* I - Last line of raster data? */
{
int i; /* Looping var */
unsigned b; /* Binary data word */
unsigned char c[5]; /* ASCII85 encoded chars */
while (length > 3)
{
b = (((((data[0] << 8) | data[1]) << 8) | data[2]) << 8) | data[3];
if (b == 0)
putc('z', prn);
else
{
c[4] = (b % 85) + '!';
b /= 85;
c[3] = (b % 85) + '!';
b /= 85;
c[2] = (b % 85) + '!';
b /= 85;
c[1] = (b % 85) + '!';
b /= 85;
c[0] = b + '!';
fwrite(c, 5, 1, prn);
};
data += 4;
length -= 4;
};
if (last_line)
{
if (length > 0)
{
for (b = 0, i = length; i > 0; b = (b << 8) | data[0], data ++, i --);
c[4] = (b % 85) + '!';
b /= 85;
c[3] = (b % 85) + '!';
b /= 85;
c[2] = (b % 85) + '!';
b /= 85;
c[1] = (b % 85) + '!';
b /= 85;
c[0] = b + '!';
fwrite(c, length + 1, 1, prn);
};
fputs("~>\n", prn);
};
}
/*
* 'ppd_find()' - Find a control string with the specified name & parameters.
*/
static char * /* O - Control string */
ppd_find(char *ppd_file, /* I - Name of PPD file */
char *name, /* I - Name of parameter */
char *option, /* I - Value of parameter */
int *order) /* O - Order of the control string */
{
char line[1024], /* Line from file */
lname[255], /* Name from line */
loption[255], /* Value from line */
*opt; /* Current control string pointer */
static char value[32768]; /* Current control string value */
if (ppd_file == NULL || name == NULL || option == NULL)
return (NULL);
if (ps_ppd_file == NULL || strcmp(ps_ppd_file, ppd_file) != 0)
{
if (ps_ppd != NULL)
fclose(ps_ppd);
ps_ppd = fopen(ppd_file, "r");
if (ps_ppd == NULL)
ps_ppd_file = NULL;
else
ps_ppd_file = ppd_file;
};
if (ps_ppd == NULL)
return (NULL);
if (order != NULL)
*order = 1000;
rewind(ps_ppd);
while (fgets(line, sizeof(line), ps_ppd) != NULL)
{
if (line[0] != '*')
continue;
if (strncasecmp(line, "*OrderDependency:", 17) == 0 && order != NULL)
{
sscanf(line, "%*s%d", order);
continue;
}
else if (sscanf(line, "*%s %[^/:]", lname, loption) != 2)
continue;
if (strcasecmp(lname, name) == 0 &&
strcasecmp(loption, option) == 0)
{
opt = strchr(line, ':') + 1;
while (*opt == ' ' || *opt == '\t')
opt ++;
if (*opt != '\"')
continue;
strcpy(value, opt + 1);
if ((opt = strchr(value, '\"')) == NULL)
{
while (fgets(line, sizeof(line), ps_ppd) != NULL)
{
strcat(value, line);
if (strchr(line, '\"') != NULL)
{
strcpy(strchr(value, '\"'), "\n");
break;
};
};
}
else
*opt = '\0';
return (value);
};
};
return (NULL);
}
/*
* End of "$Id$".
*/
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