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C/C++ Users Group Library 1996 July
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v_09_10
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phillips.exe
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DJET.C
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1990-09-08
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/********************************************************
*
* file d:\cips\djet.c
*
* Functions: This file contains
* end_graphics_mode
* get_graphics_caption
* print_bytes
* print_graphics_image
* print_original_200_row
* select_300_dpi_resolution
* select_full_graphics_mode
* set_horizontal_offset
* set_raster_width
* start_raster_graphics
*
* Purpose:
* These functions print a 200x200 image using
* dithering to an HP DeskJet or compatable (Laserjet).
* This uses an 8x8 matrix which gives 64 shades of
* gray.
*
* External Calls:
* rtiff.c - read_tiff_image
* hist.c - zero_histogram
* calculate_histogram
* perform_histogram_equalization
*
*
* Modifications:
* January 1991 - created
* 25 August 1991 - modified for use in the
* C Image Processing System.
*
┌─────┐ ┌─────┐
│ │ │ │ The function print_graphics_image
│ │ │ │ begins with 2 100x100 image arrays
│ │ │ │
│ │ │ │
└─────┘ └─────┘
┌───────────────┐
│ │ It joins them into
│ │ 1 100x200 image array
│ │
│ │
└───────────────┘
┌───────────────┐
└───────────────┘
┌───────────────┐
└───────────────┘
. It loops and creates
. 100 200 element image arrays
.
┌───────────────┐
└───────────────┘
The function print_original_200_row receives a 200
element array
┌┬──────────────────────────┬┐
└┴──────────────────────────┴┘
This array is transformed into a 8x200 array of
characters called 'row'
┌───────── ... ■───────┐
├───────── ... ■───────┤
├───────── ... ■───────┤
├───────── ... ■───────┤
├───────── ... ■───────┤
├───────── ... ■───────┤
├───────── ... ■───────┤
├───────── ... ■───────┤
└───────── ... ■───────┘
Each column of this array is a 1x8 character array which
is an 8-bit x 8-bit array
╔══╗
║ ║
╚══╝
Each row of 'row' is passed to the funnction print_bytes
for graphics printing
********************************************************/
#include "d:\cips\cips.h"
#define ESCAPE 27
#define FORMFEED '\014'
short r[200];
/*******************************************
*
* The patterns array holds the rows to the
* 8x8 matrices used for printing
* shades of gray.
*
********************************************/
char patterns[64][8] =
{ {255, 255, 255, 255, 255, 255, 255, 255},
{255, 255, 255, 255, 255, 255, 255, 127},
{255, 255, 255, 255, 255, 255, 255, 63},
{255, 255, 255, 255, 255, 255, 255, 31},
{255, 255, 255, 255, 255, 255, 255, 15},
{255, 255, 255, 255, 255, 255, 255, 7},
{255, 255, 255, 255, 255, 255, 255, 3},
{255, 255, 255, 255, 255, 255, 255, 1},
{255, 255, 255, 255, 255, 255, 255, 0},
{255, 255, 255, 255, 255, 255, 127, 0},
{255, 255, 255, 255, 255, 255, 63, 0},
{255, 255, 255, 255, 255, 255, 31, 0},
{255, 255, 255, 255, 255, 255, 15, 0},
{255, 255, 255, 255, 255, 255, 7, 0},
{255, 255, 255, 255, 255, 255, 3, 0},
{255, 255, 255, 255, 255, 255, 1, 0},
{255, 255, 255, 255, 255, 255, 0, 0},
{255, 255, 255, 255, 255, 127, 0, 0},
{255, 255, 255, 255, 255, 63, 0, 0},
{255, 255, 255, 255, 255, 31, 0, 0},
{255, 255, 255, 255, 255, 15, 0, 0},
{255, 255, 255, 255, 255, 7, 0, 0},
{255, 255, 255, 255, 255, 3, 0, 0},
{255, 255, 255, 255, 255, 1, 0, 0},
{255, 255, 255, 255, 255, 0, 0, 0},
{255, 255, 255, 255, 127, 0, 0, 0},
{255, 255, 255, 255, 63, 0, 0, 0},
{255, 255, 255, 255, 31, 0, 0, 0},
{255, 255, 255, 255, 15, 0, 0, 0},
{255, 255, 255, 255, 7, 0, 0, 0},
{255, 255, 255, 255, 3, 0, 0, 0},
{255, 255, 255, 255, 1, 0, 0, 0},
{255, 255, 255, 255, 0, 0, 0, 0},
{255, 255, 255, 127, 0, 0, 0, 0},
{255, 255, 255, 63, 0, 0, 0, 0},
{255, 255, 255, 31, 0, 0, 0, 0},
{255, 255, 255, 15, 0, 0, 0, 0},
{255, 255, 255, 7, 0, 0, 0, 0},
{255, 255, 255, 3, 0, 0, 0, 0},
{255, 255, 255, 1, 0, 0, 0, 0},
{255, 255, 255, 0, 0, 0, 0, 0},
{255, 255, 127, 0, 0, 0, 0, 0},
{255, 255, 63, 0, 0, 0, 0, 0},
{255, 255, 31, 0, 0, 0, 0, 0},
{255, 255, 15, 0, 0, 0, 0, 0},
{255, 255, 7, 0, 0, 0, 0, 0},
{255, 255, 3, 0, 0, 0, 0, 0},
{255, 255, 1, 0, 0, 0, 0, 0},
{255, 255, 0, 0, 0, 0, 0, 0},
{255, 127, 0, 0, 0, 0, 0, 0},
{255, 63, 0, 0, 0, 0, 0, 0},
{255, 31, 0, 0, 0, 0, 0, 0},
{255, 15, 0, 0, 0, 0, 0, 0},
{255, 7, 0, 0, 0, 0, 0, 0},
{255, 3, 0, 0, 0, 0, 0, 0},
{255, 1, 0, 0, 0, 0, 0, 0},
{255, 0, 0, 0, 0, 0, 0, 0},
{127, 0, 0, 0, 0, 0, 0, 0},
{ 63, 0, 0, 0, 0, 0, 0, 0},
{ 31, 0, 0, 0, 0, 0, 0, 0},
{ 15, 0, 0, 0, 0, 0, 0, 0},
{ 7, 0, 0, 0, 0, 0, 0, 0},
{ 3, 0, 0, 0, 0, 0, 0, 0},
{ 1, 0, 0, 0, 0, 0, 0, 0}};
print_graphics_image(image1, image2, image_name,
il, ie, ll, le, image_colors,
invert, caption, show_hist,
color_transform)
char caption[], image_name[], color_transform[];
int image_colors, invert,
il, ie, ll, le, show_hist;
short image1[ROWS][COLS], image2[ROWS][COLS];
{
char c[80],
page[80];
FILE *printer;
int i,
j;
unsigned long histogram[256], final_hist[256];
printer = fopen("prn", "w");
/**********************************************
*
* Print a few blank lines on the page.
*
***********************************************/
strcpy(page, " ");
my_fwriteln(printer, page);
my_fwriteln(printer, page);
/*****************************************************
*
* Read in two image arrays.
*
******************************************************/
printf("\nReading image");
read_tiff_image(image_name, image1, il, ie, ll, le);
printf("\nReading image");
read_tiff_image(image_name, image2, il, ie+100, ll, le+100);
/*****************************************************
*
* If show_hist is 1 OR do hist equalization
* then zero the histogram and
* calculate it for the two image arrays.
*
******************************************************/
if( (show_hist == 1) ||
(color_transform[0] == 'H')){
zero_histogram(histogram);
zero_histogram(final_hist);
printf("\nDJET> Calculating histograms");
calculate_histogram(image1, histogram);
calculate_histogram(image2, histogram);
}
/**************************************************
*
* Alter the images to 64 gray shades.
* Either do it with straight multiply
* and divide or use hist equalization.
*
* If using hist equalization then you must
* also read and calculate the hist for