File: c2050.c

package info (click to toggle)
c2050 0.3b-8
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 144 kB
  • sloc: ansic: 280; makefile: 55; sh: 14; python: 8
file content (407 lines) | stat: -rw-r--r-- 12,160 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
/*
 * Project:    CMYK Color Driver for the Lexmark 2050 Color Jetprinter
 *             in 300dpi mode.
 *
 * Author:     Marco Nenciarini
 * 
 * Version:    0.3b, 11.06.2007
 *
 * License:    GPL (GNU Public License)
 * 
 * This software is based on c2070 driver written by
 * Christian Kornblum .
 * 
 */

#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* head alignment (values must be >= 0)*/
#define COL_O_OFFSET 4
#define BLK_O_OFFSET 0
#define COL_V_OFFSET 0
#define BLK_V_OFFSET 4

/* various constants */
#define MAX_LINES 600
#define PAGE_WIDTH 2420
#define PAGE_HEIGHT 3408
#define GS_PAGE_WIDTH 2480
#define GS_PAGE_HEIGHT 3507
#define BLACK_PENS 48
#define COLOR_PENS 16
#define COLOR_GAP 4
#define MAGENTA_OFFSET 16
#define BYTES_PER_COLUMN 6
#define BYTES_PER_HEADER 26
#define LEFT_MARGIN 10
#define UPPER_MARGIN 100
#define COLOR_BUFFERS 6
/* the ghostscript color identifiers */
#define BLACK   0x10
#define CYAN    0x80
#define MAGENTA 0x40
#define YELLOW  0x20

/* the structure for the pixmaps */
struct tSweepBuffer {
  int bytepos;
  int bitpos;
  int bufpos;        /* this is used for the colors! */
  int unprinted;     /* does this buffer contain data? */
  char *buffer;
};

/*
 * This writes a number of zeros to a string.
 */
void ClearBuffer(char *data, int bytes)
{
  register i;
  for(i = 0; i < bytes; data[i++] = 0);
} /* ClearBuffer */

/* 
 * Initialize a sweep buffer
 */
SweepBuffer_Init (struct tSweepBuffer *SweepBuffer, int bytesize)
{
  SweepBuffer->bytepos = 0;
  SweepBuffer->bitpos = 0;
  SweepBuffer->bufpos = 0;
  SweepBuffer->unprinted = 0;
  SweepBuffer->buffer = (char *) malloc(bytesize);
  ClearBuffer(SweepBuffer->buffer, bytesize);
} /* SweepBuffer_Init */

/*
 * This puts an unterminated amount of any chars to "out". The first 
 * byte of the "string" has to give the correct number of the following bytes.
 */
void fPutLString (FILE *out, char *data) {
  int i;
  for (i = 1; i <= data[0]; putc(data[i++], out));
} /* fPutLString */

/*
 * This moves the paper by a defined number of lines (600lpi!).
 */
void LexMove(FILE *out, long int pixel)
{
  char command[] = {5,0x1b,0x2a,0x03,0x00,0x00};
  command[5] = (char) pixel;
  command[4] = (char) (pixel >> 8);
  fPutLString(out, command);
} /* LexMove */

/*
 * This initializes the printer and sets the upper margin.
 */
void LexInit(FILE *out)
{
   char command[] = {12, 0x1B,0x2A,0x80,0x1B,0x2A,0x07,
		         0x73,0x30,0x1B,0x2A,0x07,0x63};
   fPutLString(out, command);
   LexMove(out, UPPER_MARGIN);
} /* LexInit */

/*
 * This tells the printer to throw out his current page.
 */
void LexEOP(FILE *out)
{
   char command[] = {4, 0x1B,0x2A,0x07,0x65};
   fPutLString(out, command);
}

/*
 * This confusing bit of code removes empty columns from the printbuffer.
 * It returns the byte of the buffer where the important data starts and
 * changes all referencered arguments accordingly.
 */
int ReduceBytes(char *buffer, int bytespercolumn, 
		int *leftmargin, int *breite, int *bytesize) {
  register int redleft = 0; 
  register int redright = 0; 
  int bstart = 0;
  while ((buffer[redleft] == 0) && (redleft < *bytesize)) redleft++;
  while ((buffer[*bytesize - 1 - redright] == 0) && 
	 (redright < *bytesize)) redright++;
  *breite -= redleft / bytespercolumn + redright / bytespercolumn;
  *leftmargin += redleft / bytespercolumn;
  bstart = redleft - (redleft % bytespercolumn);
  if (bstart < 0) bstart = 0;
  
  return bstart;
} /* ReduceBytes */

/*
 * This sends a complete sweep to the printer. Black or color, no difference.
 */
void PrintSweep(char *buffer, char *header, int bytesize, int width, int leftmargin, FILE *out)
{
  int bstart;
  register i;
  /* Remove zeros and set a margin instead. Faster Printing. */
  bstart = ReduceBytes(buffer, BYTES_PER_COLUMN, &leftmargin,
		       &width, &bytesize);
  
  /* Calculate the number of bytes for the checksum */
  bytesize = BYTES_PER_HEADER + BYTES_PER_COLUMN * width; 
  header[4] = (char) bytesize;
  header[3] = (char) (bytesize >> 8);

  /* The number of columns */
  header[12] = (char) width;
  header[11] = (char) (width >> 8);

  /* The left margin */
  header[14] = (char) leftmargin;
  header[13] = (char) (leftmargin >> 8);

  if (width > 0) { /* do not print empty sweeps */
    for(i=0; i<BYTES_PER_HEADER; i++) putc(header[i], out);
    for(i=0; i<(bytesize);i++) putc(buffer[i+bstart], out);
  }
} /* PrintSweep */	

/*
 * This finds out if there is anything but zeros in a string
 */
int LineSum(signed char line[], int length)
{
  register i = 0;
  while (i < length)
    if(line[i++] != 0) return 1;
  return 0;
} /* LineSum */

/*
 * This is the main printing routine. Wicked and insane. Nonetheless working.
 */
void LexPrint(FILE *in, FILE *out) {
  signed char line[GS_PAGE_WIDTH / 2];
  int done_page, cur_height = 0, page_height = 0, numpages = 0;
  char lex_blkhd[BYTES_PER_HEADER] = {0x1b,0x2a,0x04,0xff,0xff,0x00,0x01,
				      0x00,0x01,0x06,0x31,0xff,0xff,0xff,0xff,
				      0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x32,
				      0x33,0x34,0x35};
  char lex_colhd[BYTES_PER_HEADER] = {0x1b,0x2a,0x04,0xff,0xff,0x00,0x01,
				      0x00,0x00,0x06,0x31,0xff,0xff,0xff,0xff,
				      0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x32,
				      0x33,0x34,0x35};
  long blkbytesize, colbytesize; 
  register int i=0;
  struct tSweepBuffer blkbuffer, colbuffer[COLOR_BUFFERS]; 
  int CurrentColBuffer = 0;
  int blkwidth, colwidth;
  int empty_lines, skipcolors;
  signed char nibble;
  int yellowcounter = 0;

  /* The printer may not be able to print every GhostScript pixel */
  if (GS_PAGE_WIDTH <= PAGE_WIDTH) blkwidth = GS_PAGE_WIDTH; 
  else blkwidth = PAGE_WIDTH;

  colwidth = blkwidth + MAGENTA_OFFSET; 
  
  /* Calculating the size for the buffers */
  blkbytesize = BYTES_PER_COLUMN * blkwidth; 
  colbytesize = BYTES_PER_COLUMN * colwidth; 

  /* As long as we get input... */
  while((line[0] = getc(in)) != EOF)
  {

    /* Get memory and clear it. */
    SweepBuffer_Init(&blkbuffer, blkbytesize);
    for (i=0; i<COLOR_BUFFERS; i++) {
      SweepBuffer_Init(&colbuffer[i], colbytesize);
      colbuffer[i].bufpos = i;
    }

    /* Initialize the printer, load a page  */
    LexInit(out);

    /* Reset all variables */
    done_page        = 0;
    page_height      = 0;
    cur_height       = COL_V_OFFSET;
    empty_lines      = 0;
    skipcolors       = 0;
    yellowcounter    = BLK_V_OFFSET;
    CurrentColBuffer = 0;

    /* ... we do the pages. */
    while(!done_page)
    {
 
      /* Read a CMYK line (GS -sDEVICE=bitcmyk) from the input */
      if (page_height == 0) {
	for (i = 1; i < (GS_PAGE_WIDTH / 2); line[i++] = getc(in));
      } else {
	for (i = 0; i < (GS_PAGE_WIDTH / 2); line[i++] = getc(in));
      }
      
      /* optimize for empty lines, if buffers are empty */
      if ((cur_height == 0) 
	  && !LineSum(line, GS_PAGE_WIDTH / 2)
	  && (page_height < PAGE_HEIGHT)
	  && (page_height < GS_PAGE_HEIGHT)
	  && !(blkbuffer.unprinted | colbuffer[0].unprinted 
	       | colbuffer[1].unprinted | colbuffer[3].unprinted))
	{
	  empty_lines++;
	}
      else /* This line does not seem to be empty or there is still data */
	{
	  if (empty_lines) {
	    LexMove(out, empty_lines * 2);
	    empty_lines = 0;
	    yellowcounter = BLK_V_OFFSET;
	  }

	  /* count lines and set values */
	  blkbuffer.bitpos  = 
	     (yellowcounter % BLACK_PENS) % 8;
	  blkbuffer.bytepos = 5 - (yellowcounter % BLACK_PENS) / 8;
	  
	  /* cyan */
	  colbuffer[0].bitpos  = (cur_height % 8);
	  colbuffer[0].bytepos = 1 - (cur_height / 8) % 2;
	  colbuffer[0].bufpos  = cur_height / COLOR_PENS;
	  
	  /* magenta */
	  colbuffer[1].bitpos  
	    = ((cur_height + COLOR_GAP + COLOR_PENS) % 8);
	  colbuffer[1].bytepos 
	    = (MAGENTA_OFFSET * BYTES_PER_COLUMN) + 3 - ((cur_height + COLOR_GAP + COLOR_PENS) / 8) % 2;
	  colbuffer[1].bufpos  
	    = ((cur_height + COLOR_GAP + COLOR_PENS) / COLOR_PENS) % 3;

	  /* yellow has 6 buffers, so that it is not mapped to buffers
	     which have not been printed by cyan yet. The Buffers
	     > 2 are mapped to the right corresponding buffer 
	     after it has been sent to the printer. */
	  colbuffer[2].bitpos  
	    = ((cur_height + 2 * (COLOR_GAP + COLOR_PENS)) % 8);
	  colbuffer[2].bytepos 
	    = 5 - ((cur_height + 2 * (COLOR_GAP + COLOR_PENS)) / 8) % 2;
	  colbuffer[2].bufpos
	    = ((cur_height + 2 * (COLOR_GAP + COLOR_PENS)) / COLOR_PENS) % 3;
	  if (colbuffer[2].bufpos == colbuffer[0].bufpos)
	    colbuffer[2].bufpos += 3;

	  /* This extracts the nibbles and transforms them to the bits
	     in the output stream. */
	  for(i=0; (i <= blkwidth); i++)
	    {                              
	      nibble = (line[i/2] << (4 * (i % 2))) & 0xF0;
	      if (nibble & BLACK) {
		blkbuffer.buffer[(i * BYTES_PER_COLUMN) + blkbuffer.bytepos] 
		  |= 0x01 << blkbuffer.bitpos; 
		blkbuffer.unprinted = 1;
	      }
	      if (nibble & CYAN) {
		colbuffer[colbuffer[0].bufpos].buffer
		  [(i * BYTES_PER_COLUMN) + colbuffer[0].bytepos] 
		  |= 0x01 << colbuffer[0].bitpos; 
		colbuffer[colbuffer[0].bufpos].unprinted = 1;
	      }
	      if (nibble & MAGENTA) {
		colbuffer[colbuffer[1].bufpos].buffer
		  [(i * BYTES_PER_COLUMN) + colbuffer[1].bytepos] 
		  |= 0x01 << colbuffer[1].bitpos; 
		colbuffer[colbuffer[1].bufpos].unprinted = 1;
	      }
	      if (nibble & YELLOW) {
		colbuffer[colbuffer[2].bufpos].buffer
		  [(i * BYTES_PER_COLUMN) + colbuffer[2].bytepos] 
		  |= 0x01 << colbuffer[2].bitpos; 
		colbuffer[colbuffer[2].bufpos].unprinted = 1;
	      }
	    }
	  cur_height++;
	  yellowcounter++;
	   /* Buffer is full or page is over. Print it. Black first...*/
	  if (!(yellowcounter % BLACK_PENS) || (page_height >= PAGE_HEIGHT))
	    {
	      if (skipcolors) {
		 LexMove(out, 2*COLOR_PENS*skipcolors);
		 skipcolors=0;
	      }
	      PrintSweep(blkbuffer.buffer, lex_blkhd, blkbytesize, blkwidth, LEFT_MARGIN + BLK_O_OFFSET, out);
	      ClearBuffer(blkbuffer.buffer, blkbytesize);
	      blkbuffer.unprinted = 0;
	    }
	  /* ...then finally colors */
	  if (!(cur_height % COLOR_PENS) || (page_height >= PAGE_HEIGHT))
	    {
	      if (colbuffer[CurrentColBuffer].unprinted) {
  	         if (skipcolors) {
		    LexMove(out, 2*COLOR_PENS*skipcolors);
		    skipcolors=0;
		 }
  	         PrintSweep(colbuffer[CurrentColBuffer].buffer, 
			    lex_colhd, colbytesize, colwidth, LEFT_MARGIN + COL_O_OFFSET, out);
	         ClearBuffer(colbuffer[CurrentColBuffer].buffer, colbytesize);
	         LexMove(out, 2*COLOR_PENS);
	      }
	      else
		 skipcolors++;
	      /* now handle the yellow stuff */
	      for(i = 0; i < colbytesize; i++) 
		colbuffer[CurrentColBuffer].buffer[i] 
		  |= colbuffer[CurrentColBuffer + 3].buffer[i];
	      ClearBuffer(colbuffer[CurrentColBuffer + 3].buffer, colbytesize);
	      colbuffer[CurrentColBuffer].unprinted = 
		colbuffer[CurrentColBuffer + 3].unprinted;
	      colbuffer[CurrentColBuffer + 3].unprinted = 0;
	      /* switch to the next buffer */
	      CurrentColBuffer = ++CurrentColBuffer % 3;
	    }
	  if (cur_height == 3 * COLOR_PENS) cur_height = 0; 
	  if (!(yellowcounter % BLACK_PENS) && !(yellowcounter % COLOR_PENS)) yellowcounter = 0;
	}
      
      /* this page has found an end */ 
      if ((page_height++ >= PAGE_HEIGHT)||
	  (page_height >= GS_PAGE_HEIGHT)) done_page = 1; 
    }

    /* hand out the page */
    LexEOP(out);

    /* eat any remaining whitespace so process will not hang */
    if (PAGE_HEIGHT < GS_PAGE_HEIGHT) 
      for(i=0;
	  (i < ((GS_PAGE_HEIGHT - PAGE_HEIGHT) * GS_PAGE_WIDTH / 2)) && (nibble != EOF);
          i++)
	 nibble = getc(in);

    /* count the pages and free memory */
    numpages++;
    free(blkbuffer.buffer);
    for (i=0; i < COLOR_BUFFERS; free(colbuffer[i++].buffer));
  }
  if (numpages == 0) fprintf(stderr, "c2050: No pages printed!");
} /* LexPrint */

/*
 * The main program. Sets input and output streams.
 */
int main(int argc, char *argv[]) {
  FILE *InputFile;
  FILE *OutPutFile;
  
  InputFile  = stdin;
  OutPutFile = stdout;

  LexPrint(InputFile, OutPutFile);

  fclose(OutPutFile);
  fclose(InputFile);
}