inc/psGfx.h File Reference

#include "psPoly.h"

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Data Structures
struct	psGfx
Functions
psGfx *	psOpen (char *fileName, double userWidth, double userHeight, double ptWidth, double ptHeight, double ptMargin)
void	psClose (struct psGfx **pPs)
void	psTranslate (struct psGfx *ps, double xTrans, double yTrans)
void	psClipRect (struct psGfx *ps, double x, double y, double width, double height)
void	psDrawBox (struct psGfx *ps, double x, double y, double width, double height)
void	psDrawLine (struct psGfx *ps, double x1, double y1, double x2, double y2)
void	psFillUnder (struct psGfx *ps, double x1, double y1, double x2, double y2, double bottom)
void	psXyOut (struct psGfx *ps, double x, double y)
void	psWhOut (struct psGfx *ps, double width, double height)
void	psMoveTo (struct psGfx *ps, double x, double y)
void	psTextAt (struct psGfx *ps, double x, double y, char *text)
void	psTextDown (struct psGfx *ps, double x, double y, char *text)
void	psTextRight (struct psGfx *mg, double x, double y, double width, double height, char *text)
void	psTextCentered (struct psGfx *mg, double x, double y, double width, double height, char *text)
void	psTimesFont (struct psGfx *ps, double size)
void	psSetColor (struct psGfx *ps, int r, int g, int b)
void	psSetGray (struct psGfx *ps, double grayVal)
void	psPushG (struct psGfx *ps)
void	psPopG (struct psGfx *ps)
void	psDrawPoly (struct psGfx *ps, struct psPoly *poly, boolean filled)
void	psFillEllipse (struct psGfx *ps, double x, double y, double xrad, double yrad)
void	psDrawEllipse (struct psGfx *ps, double x, double y, double xrad, double yrad, double startAngle, double endAngle)
char *	convertEpsToPdf (char *epsFile)

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Function Documentation

char* convertEpsToPdf

(

char *

epsFile

)

Definition at line 346 of file psGfx.c.

References addSuffix(), chopLine, chopSuffix(), cloneString(), freez(), lineFileClose(), lineFileNext(), lineFileOpen(), round, safef(), and TRUE.

{
char *pdfTmpName = NULL, *pdfName=NULL;
char cmdBuffer[2048];
int sysVal = 0;
struct lineFile *lf = NULL;
char *line;
int lineSize=0;
float width=0, height=0;
pdfTmpName = cloneString(epsFile);

/* Get the dimensions of bounding box. */
lf = lineFileOpen(epsFile, TRUE);
while(lineFileNext(lf, &line, &lineSize)) 
    {
    if(strstr( line, "BoundingBox:")) 
        {
        char *words[5];
        chopLine(line, words);
        width = atof(words[3]);
        height = atof(words[4]);
        break;
        }
    }
lineFileClose(&lf);
        
/* Do conversion. */
chopSuffix(pdfTmpName);
pdfName = addSuffix(pdfTmpName, ".pdf");
safef(cmdBuffer, sizeof(cmdBuffer), "ps2pdf -dDEVICEWIDTHPOINTS=%d -dDEVICEHEIGHTPOINTS=%d %s %s", 
      round(width), round(height), epsFile, pdfName);
sysVal = system(cmdBuffer);
if(sysVal != 0)
    freez(&pdfName);
freez(&pdfTmpName);
return pdfName;
}

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void psClipRect	(	struct psGfx *	ps,
		double	x,
		double	y,
		double	width,
		double	height
	)

Definition at line 24 of file psGfx.c.

References psGfx::f, psWhOut(), and psXyOut().

Referenced by pscmSetClip(), pscmUnclip(), and psOpen().

{
FILE *f = ps->f;
fprintf(f, "cliprestore ");
psXyOut(ps, x, y+height); 
psWhOut(ps, width, height);       
fprintf(f, "rectclip\n");
}

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void psClose

(

struct psGfx **

pPs

)

Definition at line 105 of file psGfx.c.

References carefulClose(), psGfx::f, and freez().

Referenced by pscmClose().

{
struct psGfx *ps = *pPs;
if (ps != NULL)
    {
    carefulClose(&ps->f);
    freez(pPs);
    }
}

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void psDrawBox	(	struct psGfx *	ps,
		double	x,
		double	y,
		double	width,
		double	height
	)

Definition at line 147 of file psGfx.c.

References psGfx::f, psWhOut(), and psXyOut().

Referenced by pscmBoxToPs(), pscmDot(), pscmLine(), and pscmVerticalSmear().

{
if (width > 0 && height > 0)
    {
    psWhOut(ps, width, height);
    psXyOut(ps, x, y+height); 
    fprintf(ps->f, "fillBox\n");
    }
}

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void psDrawEllipse	(	struct psGfx *	ps,
		double	x,
		double	y,
		double	xrad,
		double	yrad,
		double	startAngle,
		double	endAngle
	)

Definition at line 332 of file psGfx.c.

References psGfx::f, psFloatOut(), psWhOut(), and psXyOut().

{
FILE *f = ps->f;
fprintf(f, "newpath\n");
psXyOut(ps, x, y);
psWhOut(ps, xrad, yrad);
psFloatOut(f, startAngle);
psFloatOut(f, endAngle);
fprintf(f, "ellipse\n");
fprintf(f, "closepath\n");
fprintf(f, "stroke\n");
}

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void psDrawLine	(	struct psGfx *	ps,
		double	x1,
		double	y1,
		double	x2,
		double	y2
	)

Definition at line 159 of file psGfx.c.

References psGfx::f, psMoveTo(), and psXyOut().

Referenced by pscmLine().

{
FILE *f = ps->f;
fprintf(f, "newpath\n");
psMoveTo(ps, x1, y1);
psXyOut(ps, x2, y2);
fprintf(ps->f, "lineto\n");
fprintf(f, "stroke\n");
}

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void psDrawPoly	(	struct psGfx *	ps,
		struct psPoly *	poly,
		boolean	filled
	)

Definition at line 295 of file psGfx.c.

References psGfx::f, psPoint::next, psLineTo(), psMoveTo(), psPoly::ptList, psPoint::x, and psPoint::y.

Referenced by pscmDrawPoly().

{
FILE *f = ps->f;
struct psPoint *p = poly->ptList;
fprintf(f, "newpath\n");
psMoveTo(ps, p->x, p->y);
for (;;)
    {
    p = p->next;
    psLineTo(ps, p->x, p->y);
    if (p == poly->ptList)
        break;
    }
if (filled)
    {
    fprintf(f, "fill\n");
    }
else
    {
    fprintf(f, "closepath\n");
    fprintf(f, "stroke\n");
    }
}

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void psFillEllipse	(	struct psGfx *	ps,
		double	x,
		double	y,
		double	xrad,
		double	yrad
	)

Definition at line 321 of file psGfx.c.

References psGfx::f, psWhOut(), and psXyOut().

{
FILE *f = ps->f;
fprintf(f, "newpath\n");
psXyOut(ps, x, y);
psWhOut(ps, xrad, yrad);
fprintf(f, "%d %d ellipse\n",   0, 360);
fprintf(f, "closepath\n");
fprintf(f, "fill\n");
}

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void psFillUnder	(	struct psGfx *	ps,
		double	x1,
		double	y1,
		double	x2,
		double	y2,
		double	bottom
	)

Definition at line 170 of file psGfx.c.

References psGfx::f, psLineTo(), and psMoveTo().

Referenced by pscmFillUnder().

{
FILE *f = ps->f;
fprintf(f, "newpath\n");
psMoveTo(ps, x1, y1);
psLineTo(ps, x2, y2);
psLineTo(ps, x2, bottom);
psLineTo(ps, x1, bottom);
fprintf(f, "closepath\n");
fprintf(f, "fill\n");
}

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void psMoveTo	(	struct psGfx *	ps,
		double	x,
		double	y
	)

Definition at line 132 of file psGfx.c.

References psGfx::f, and psXyOut().

Referenced by psDrawLine(), psDrawPoly(), psFillUnder(), psTextAt(), psTextCentered(), psTextDown(), and psTextRight().

{
psXyOut(ps, x, y);
fprintf(ps->f, "moveto\n");
}

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struct psGfx* psOpen	(	char *	fileName,
		double	userWidth,
		double	userHeight,
		double	ptWidth,
		double	ptHeight,
		double	ptMargin
	)			[read]

Definition at line 49 of file psGfx.c.

References AllocVar, psGfx::f, psGfx::fontHeight, mustOpen(), psClipRect(), psWriteHeader(), psGfx::ptHeight, psGfx::ptWidth, psGfx::userHeight, psGfx::userWidth, psGfx::xOff, psGfx::xScale, psGfx::yOff, and psGfx::yScale.

Referenced by pscmOpen().

{
struct psGfx *ps;

/* Allocate structure and open file. */
AllocVar(ps);
ps->f = mustOpen(fileName, "w");

/* Save page dimensions and calculate scaling factors. */
ps->userWidth = userWidth;
ps->userHeight = userHeight;
ps->ptWidth = ptWidth;
ps->xScale = (ptWidth - 2*ptMargin)/userWidth;
if (ptHeight != 0.0)
   {
   ps->ptHeight = ptHeight;
   ps->yScale = (ptHeight - 2*ptMargin) / userHeight;
   }
else
   {
   ps->yScale = ps->xScale;
   ptHeight = ps->ptHeight = userHeight * ps->yScale + 2*ptMargin;
   }
/* 0.5, 0.5 is the center of the pixel in upper-left corner which corresponds to (0,0) */
ps->xOff = ptMargin;
ps->yOff = ptMargin;
ps->fontHeight = 10;

/* Cope with fact y coordinates are bottom to top rather
 * than top to bottom. */
ps->yScale = -ps->yScale;
ps->yOff = ps->ptHeight - ps->yOff;

psWriteHeader(ps->f, ptWidth, ptHeight);

/* Set initial clipping rectangle. */
psClipRect(ps, 0, 0, ps->userWidth, ps->userHeight);

/* Set line width to a single pixel. */
fprintf(ps->f, "%f setlinewidth\n", ps->xScale);

return ps;
}

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void psPopG

(

struct psGfx *

ps

)

Definition at line 289 of file psGfx.c.

References psGfx::f.

{
fprintf(ps->f, "grestore\n");
}

void psPushG

(

struct psGfx *

ps

)

Definition at line 283 of file psGfx.c.

References psGfx::f.

{
fprintf(ps->f, "gsave\n");
}

void psSetColor	(	struct psGfx *	ps,
		int	r,
		int	g,
		int	b
	)

Definition at line 254 of file psGfx.c.

References psGfx::f, and psFloatOut().

Referenced by pscmSetColor().

{
FILE *f = ps->f;
double scale = 1.0/255;
if (r == g && g == b)
    {
    psFloatOut(f, scale * r);
    fprintf(f, "setgray\n");
    }
else
    {
    psFloatOut(f, scale * r);
    psFloatOut(f, scale * g);
    psFloatOut(f, scale * b);
    fprintf(f, "setrgbcolor\n");
    }
}

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void psSetGray	(	struct psGfx *	ps,
		double	grayVal
	)

Definition at line 273 of file psGfx.c.

References psGfx::f, and psFloatOut().

{
FILE *f = ps->f;
if (grayVal < 0) grayVal = 0;
if (grayVal > 1) grayVal = 1;
psFloatOut(f, grayVal);
fprintf(f, "setgray\n");
}

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void psTextAt	(	struct psGfx *	ps,
		double	x,
		double	y,
		char *	text
	)

Definition at line 201 of file psGfx.c.

References psGfx::f, psGfx::fontHeight, and psMoveTo().

Referenced by pscmText().

{
char c;
psMoveTo(ps, x, y + ps->fontHeight);
fprintf(ps->f, "(");
while ((c = *text++) != 0)
    {
    if (c == ')' || c == '(')
        fprintf(ps->f, "\\");
    fprintf(ps->f, "%c", c);
    }
fprintf(ps->f, ") show\n");
}

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void psTextCentered	(	struct psGfx *	mg,
		double	x,
		double	y,
		double	width,
		double	height,
		char *	text
	)

Definition at line 226 of file psGfx.c.

References psGfx::f, psGfx::fontHeight, and psMoveTo().

Referenced by pscmTextCentered().

{
char c;
y += (height - ps->fontHeight)/2;
psMoveTo(ps, x+width/2, y + ps->fontHeight);
fprintf(ps->f, "(");
while ((c = *text++) != 0)
    {
    if (c == ')' || c == '(')
        fprintf(ps->f, "\\");
    fprintf(ps->f, "%c", c);
    }
fprintf(ps->f, ") showMiddle\n");
}

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void psTextDown	(	struct psGfx *	ps,
		double	x,
		double	y,
		char *	text
	)

Definition at line 244 of file psGfx.c.

References psGfx::f, and psMoveTo().

{
psMoveTo(ps, x, y);
fprintf(ps->f, "gsave\n");
fprintf(ps->f, "-90 rotate\n");
fprintf(ps->f, "(%s) show\n", text);
fprintf(ps->f, "grestore\n");
}

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void psTextRight	(	struct psGfx *	mg,
		double	x,
		double	y,
		double	width,
		double	height,
		char *	text
	)

Definition at line 216 of file psGfx.c.

References psGfx::f, psGfx::fontHeight, and psMoveTo().

Referenced by pscmTextRight().

{
y += (height - ps->fontHeight)/2;
psMoveTo(ps, x+width, y + ps->fontHeight);
fprintf(ps->f, "(%s) showBefore\n", text);
}

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void psTimesFont	(	struct psGfx *	ps,
		double	size
	)

Definition at line 187 of file psGfx.c.

References psGfx::f, psGfx::fontHeight, and psGfx::yScale.

Referenced by pscmSetFont().

{
FILE *f = ps->f;
fprintf(f, "/Helvetica findfont ");

/* Note the 1.2 and the 1.0 below seem to get it to 
 * position about where the stuff developed for pixel
 * based systems expects it.  It is all a kludge though! */
fprintf(f, "%f scalefont setfont\n", -size*ps->yScale*1.2);
ps->fontHeight = size*0.8;
}

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void psTranslate	(	struct psGfx *	ps,
		double	xTrans,
		double	yTrans
	)

Definition at line 98 of file psGfx.c.

References psGfx::xOff, psGfx::xScale, psGfx::yOff, and psGfx::yScale.

Referenced by pscmOpen().

{
ps->xOff += xTrans*ps->xScale;   
ps->yOff += yTrans*ps->yScale;
}

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void psWhOut	(	struct psGfx *	ps,
		double	width,
		double	height
	)

Definition at line 124 of file psGfx.c.

References psGfx::f, psFloatOut(), psGfx::xScale, and psGfx::yScale.

Referenced by psClipRect(), psDrawBox(), psDrawEllipse(), and psFillEllipse().

{
FILE *f = ps->f;
psFloatOut(f, width * ps->xScale);
psFloatOut(f, height * -ps->yScale);
}

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void psXyOut	(	struct psGfx *	ps,
		double	x,
		double	y
	)

Definition at line 116 of file psGfx.c.

References psGfx::f, psFloatOut(), psGfx::xOff, psGfx::xScale, psGfx::yOff, and psGfx::yScale.

Referenced by psClipRect(), psDrawBox(), psDrawEllipse(), psDrawLine(), psFillEllipse(), psLineTo(), and psMoveTo().

{
FILE *f = ps->f;
psFloatOut(f, x * ps->xScale + ps->xOff);
psFloatOut(f, y * ps->yScale + ps->yOff);
}

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