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/*****************************************************************
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* SQUID - a library of functions for biological sequence analysis
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* Copyright (C) 1992-2002 Washington University School of Medicine
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* This source code is freely distributed under the terms of the
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* GNU General Public License. See the files COPYRIGHT and LICENSE
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*****************************************************************/
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* SRE, Thu Jun 21 18:02:31 2001 [St. Louis]
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* Some crude support for Encapsulated PostScript (EPS) output,
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* CVS $Id: eps.c,v 1.4 2002/02/24 19:39:27 eddy Exp)
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/* Function: EPSWriteSmallMSA()
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* Date: SRE, Thu Jun 21 18:15:21 2001 [St. Louis]
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* Purpose: Write an alignment in singleblock, Stockholm/SELEX like
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* format to an open file. Very crude.
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* Currently fails if the alignment is >50 columns long, because
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* it doesn't think it will fit on a single page.
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* Args: fp - open file for writing
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* msa - alignment to write
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EPSWriteSmallMSA(FILE *fp, MSA *msa)
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int namewidth; /* namewidth in PostScript units */
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int fontwidth; /* width of a character in this font */
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int hspace; /* horizontal space between aligned chars */
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int vspace; /* vertical space between sequences */
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char *font; /* font name, e.g. "Courier" */
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int fontsize; /* font size in pts */
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int i,j; /* counter over sequences, columns */
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int len; /* tmp var holding length of something */
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int width, height; /* width and height of bounding box */
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int xpos, ypos; /* x,y position */
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/* Set some font characteristics; done here, so it'll
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* be easy to change. Magic numbers for Courier 12 determined
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font = sre_strdup("Courier", -1);
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/* Find the width of the longest sequence name in characters.
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for (i = 0; i < msa->nseq; i++)
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if ((len = (int) strlen(msa->sqname[i])) > namewidth)
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namewidth += 1; /* add a space to separate name & aligned seq */
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namewidth *= fontwidth;
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/* Determine bounding box
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if (msa->alen > 50) Die("No EPS fmt if alignment is >50 columns");
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width = namewidth + hspace*msa->alen;
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if (width > 612) Die("Alignment too wide to write in EPS");
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height = vspace*msa->nseq;
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if (height > 792) Die("Too many seqs to write in EPS");
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/* Magic EPS header, bare-bones DSC-compliant.
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fprintf(fp, "%%!PS-Adobe-3.0 EPSF-3.0\n");
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fprintf(fp, "%%%%BoundingBox: %d %d %d %d\n", 0, 0, width, height);
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fprintf(fp, "%%%%Pages: 1\n");
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fprintf(fp, "%%%%EndComments\n");
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/* More postscript magic before we start the alignment
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fprintf(fp, "/%s findfont\n", font);
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fprintf(fp, "%d scalefont\n", fontsize);
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fprintf(fp, "setfont\n");
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fprintf(fp, "newpath\n");
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/* Write the alignment in PostScript in a single block
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for (i = 0; i < msa->nseq; i++)
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ypos = (msa->nseq-i-1)*vspace;
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fprintf(fp, "%d %d moveto\n", 0, ypos);
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fprintf(fp, "(%s) show\n", msa->sqname[i]);
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for (j = 0; j < msa->alen; j++)
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fprintf(fp, "%d %d moveto\n", xpos, ypos);
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fprintf(fp, "(%c) show\n", msa->aseq[i][j]);