path: root/src/bltGrPSOutput.C

/*
 * Smithsonian Astrophysical Observatory, Cambridge, MA, USA
 * This code has been modified under the terms listed below and is made
 * available under the same terms.
 */

/*
 * bltPs.c --
 *
 * This module implements general PostScript conversion routines.
 *
 *	Copyright 1991-2004 George A Howlett.
 *
 *	Permission is hereby granted, free of charge, to any person obtaining
 *	a copy of this software and associated documentation files (the
 *	"Software"), to deal in the Software without restriction, including
 *	without limitation the rights to use, copy, modify, merge, publish,
 *	distribute, sublicense, and/or sell copies of the Software, and to
 *	permit persons to whom the Software is furnished to do so, subject to
 *	the following conditions:
 *
 *	The above copyright notice and this permission notice shall be
 *	included in all copies or substantial portions of the Software.
 *
 *	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *	EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *	NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *	LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *	OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *	WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#include <stdarg.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>

#include <tkPort.h>
#include <tkInt.h>
#include <tk3d.h>

#include "bltInt.h"
#include "bltMath.h"
#include "bltDBuffer.h"
#include "bltPsInt.h"

#define FONT_ITALIC	(1<<0)
#define FONT_BOLD	(1<<1)

#define PS_MAXPATH	1500		/* Maximum number of components in a
					 * PostScript (level 1) path. */

#define PICA_MM		2.83464566929
#define PICA_INCH	72.0
#define PICA_CM		28.3464566929

static Tcl_Interp *psInterp = NULL;

/*
 *---------------------------------------------------------------------------
 *
 * Blt_Ps_GetPica --
 *
 *	Given a string, returns the number of pica corresponding to that
 *	string.
 *
 * Results:
 *	The return value is a standard TCL return result.  If TCL_OK is
 *	returned, then everything went well and the pixel distance is stored
 *	at *doublePtr; otherwise TCL_ERROR is returned and an error message is
 *	left in interp->result.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */
int
Blt_Ps_GetPicaFromObj(
    Tcl_Interp *interp,			/* Use this for error reporting. */
    Tcl_Obj *objPtr,			/* String describing a number of
					 * pixels. */
    int *picaPtr)			/* Place to store converted result. */
{
    char *p;
    double pica;
    const char *string;
    
    string = Tcl_GetString(objPtr);
    pica = strtod((char *)string, &p);
    if (p == string) {
	goto error;
    }
    if (pica < 0.0) {
	goto error;
    }
    while ((*p != '\0') && isspace((unsigned char)(*p))) {
	p++;
    }
    switch (*p) {
	case '\0':			     break;
	case 'c': pica *= PICA_CM;   p++;    break;
	case 'i': pica *= PICA_INCH; p++;    break;
	case 'm': pica *= PICA_MM;   p++;    break;
	case 'p': p++;                       break;
	default:  goto error;
    }
    while ((*p != '\0') && isspace((unsigned char)(*p))) {
	p++;
    }
    if (*p == '\0') {
	*picaPtr = ROUND(pica);
	return TCL_OK;
    }
 error:
    Tcl_AppendResult(interp, "bad screen distance \"", string, "\"", 
	(char *) NULL);
    return TCL_ERROR;
}

int
Blt_Ps_GetPadFromObj(
    Tcl_Interp *interp,			/* Interpreter to send results back
					 * to */
    Tcl_Obj *objPtr,			/* Pixel value string */
    Blt_Pad *padPtr)
{
    int side1, side2;
    int objc;
    Tcl_Obj **objv;

    if (Tcl_ListObjGetElements(interp, objPtr, &objc, &objv) != TCL_OK) {
	return TCL_ERROR;
    }
    if ((objc < 1) || (objc > 2)) {
	Tcl_AppendResult(interp, "wrong # elements in padding list",
	    (char *)NULL);
	return TCL_ERROR;
    }
    if (Blt_Ps_GetPicaFromObj(interp, objv[0], &side1) != TCL_OK) {
	return TCL_ERROR;
    }
    side2 = side1;
    if ((objc > 1) && 
	(Blt_Ps_GetPicaFromObj(interp, objv[1], &side2) != TCL_OK)) {
	return TCL_ERROR;
    }
    /* Don't update the pad structure until we know both values are okay. */
    padPtr->side1 = side1;
    padPtr->side2 = side2;
    return TCL_OK;
}

/*
 *---------------------------------------------------------------------------
 *
 * Blt_Ps_ComputeBoundingBox --
 *
 * 	Computes the bounding box for the PostScript plot.  First get the size
 * 	of the plot (by default, it's the size of graph's X window).  If the
 * 	plot plus the page border is bigger than the designated paper size, or
 * 	if the "-maxpect" option is turned on, scale the plot to the page.
 *
 *	Note: All coordinates/sizes are in screen coordinates, not PostScript
 *	      coordinates.  This includes the computed bounding box and paper
 *	      size.  They will be scaled to printer points later.
 *
 * Results:
 *	Returns the height of the paper in screen coordinates.
 *
 * Side Effects:
 *	The graph dimensions (width and height) are changed to the requested
 *	PostScript plot size.
 *
 *---------------------------------------------------------------------------
 */
int
Blt_Ps_ComputeBoundingBox(PageSetup *setupPtr, int width, int height)
{
    int paperWidth, paperHeight;
    int x, y, hSize, vSize, hBorder, vBorder;
    float hScale, vScale, scale;

    x = setupPtr->padLeft;
    y = setupPtr->padTop;

    hBorder = PADDING(setupPtr->xPad);
    vBorder = PADDING(setupPtr->yPad);

    if (setupPtr->flags & PS_LANDSCAPE) {
	hSize = height;
	vSize = width;
    } else {
	hSize = width;
	vSize = height;
    }
    /*
     * If the paper size wasn't specified, set it to the graph size plus the
     * paper border.
     */
    paperWidth = (setupPtr->reqPaperWidth > 0) ? setupPtr->reqPaperWidth :
	hSize + hBorder;
    paperHeight = (setupPtr->reqPaperHeight > 0) ? setupPtr->reqPaperHeight :
	vSize + vBorder;

    /*
     * Scale the plot size (the graph itself doesn't change size) if it's
     * bigger than the paper or if -maxpect was set.
     */
    hScale = vScale = 1.0f;
    if ((setupPtr->flags & PS_MAXPECT) || ((hSize + hBorder) > paperWidth)) {
	hScale = (float)(paperWidth - hBorder) / (float)hSize;
    }
    if ((setupPtr->flags & PS_MAXPECT) || ((vSize + vBorder) > paperHeight)) {
	vScale = (float)(paperHeight - vBorder) / (float)vSize;
    }
    scale = MIN(hScale, vScale);
    if (scale != 1.0f) {
	hSize = (int)((hSize * scale) + 0.5f);
	vSize = (int)((vSize * scale) + 0.5f);
    }
    setupPtr->scale = scale;
    if (setupPtr->flags & PS_CENTER) {
	if (paperWidth > hSize) {
	    x = (paperWidth - hSize) / 2;
	}
	if (paperHeight > vSize) {
	    y = (paperHeight - vSize) / 2;
	}
    }
    setupPtr->left = x;
    setupPtr->bottom = y;
    setupPtr->right = x + hSize - 1;
    setupPtr->top = y + vSize - 1;
    setupPtr->paperHeight = paperHeight;
    setupPtr->paperWidth = paperWidth;
    return paperHeight;
}

PostScript *
Blt_Ps_Create(Tcl_Interp *interp, PageSetup *setupPtr)
{
    PostScript *psPtr;

    psPtr = malloc(sizeof(PostScript));
    psPtr->setupPtr = setupPtr;
    psPtr->interp = interp;
    Tcl_DStringInit(&psPtr->dString);
    return psPtr;
}

void 
Blt_Ps_SetPrinting(PostScript *psPtr, int state)
{
    psInterp = ((state) && (psPtr != NULL)) ? psPtr->interp : NULL;
}

int
Blt_Ps_IsPrinting(void)
{
    return (psInterp != NULL);
}

void
Blt_Ps_Free(PostScript *psPtr)
{
    Tcl_DStringFree(&psPtr->dString);
    free(psPtr);
}

const char *
Blt_Ps_GetValue(PostScript *psPtr, int *lengthPtr)
{
    *lengthPtr = strlen(Tcl_DStringValue(&psPtr->dString));
    return Tcl_DStringValue(&psPtr->dString);
}

void
Blt_Ps_SetInterp(PostScript *psPtr, Tcl_Interp *interp)
{
    Tcl_DStringResult(interp, &psPtr->dString);
}

char *
Blt_Ps_GetScratchBuffer(PostScript *psPtr)
{
    return psPtr->scratchArr;
}

Tcl_Interp *
Blt_Ps_GetInterp(PostScript *psPtr)
{
    return psPtr->interp;
}

Tcl_DString *
Blt_Ps_GetDString(PostScript *psPtr)
{
    return &psPtr->dString;
}

int 
Blt_Ps_SaveFile(Tcl_Interp *interp, PostScript *psPtr, const char *fileName)
{
    Tcl_Channel channel;
    int nWritten, nBytes;
    char *bytes;

    channel = Tcl_OpenFileChannel(interp, fileName, "w", 0660);
    if (channel == NULL) {
	return TCL_ERROR;
    }
    nBytes = Tcl_DStringLength(&psPtr->dString);
    bytes = Tcl_DStringValue(&psPtr->dString);
    nWritten = Tcl_Write(channel, bytes, nBytes);
    Tcl_Close(interp, channel);
    if (nWritten != nBytes) {
	Tcl_AppendResult(interp, "short file \"", fileName, (char *)NULL);
	Tcl_AppendResult(interp, "\" : wrote ", Blt_Itoa(nWritten), " of ", 
			 (char *)NULL);
	Tcl_AppendResult(interp, Blt_Itoa(nBytes), " bytes.", (char *)NULL); 
	return TCL_ERROR;
    }	
    return TCL_OK;
}

void
Blt_Ps_VarAppend
TCL_VARARGS_DEF(PostScript *, arg1)
{
    va_list argList;
    PostScript *psPtr;
    const char *string;

    psPtr = TCL_VARARGS_START(PostScript, arg1, argList);
    for (;;) {
	string = va_arg(argList, char *);
	if (string == NULL) {
	    break;
	}
	Tcl_DStringAppend(&psPtr->dString, string, -1);
    }
}

void
Blt_Ps_AppendBytes(PostScript *psPtr, const char *bytes, int length)
{
    Tcl_DStringAppend(&psPtr->dString, bytes, length);
}

void
Blt_Ps_Append(PostScript *psPtr, const char *string)
{
    Tcl_DStringAppend(&psPtr->dString, string, -1);
}

void
Blt_Ps_Format
TCL_VARARGS_DEF(PostScript *, arg1)
{
    va_list argList;
    PostScript *psPtr;
    char *fmt;

    psPtr = TCL_VARARGS_START(PostScript, arg1, argList);
    fmt = va_arg(argList, char *);
    vsnprintf(psPtr->scratchArr, POSTSCRIPT_BUFSIZ, fmt, argList);
    va_end(argList);
    Tcl_DStringAppend(&psPtr->dString, psPtr->scratchArr, -1);
}

int
Blt_Ps_IncludeFile(Tcl_Interp *interp, Blt_Ps ps, const char *fileName)
{
    Tcl_Channel channel;
    Tcl_DString dString;
    char *buf;
    char *libDir;
    int nBytes;

    buf = Blt_Ps_GetScratchBuffer(ps);

    /*
     * Read in a standard prolog file from file and append it to the
     * PostScript output stored in the Tcl_DString in psPtr.
     */

    libDir = (char *)Tcl_GetVar(interp, "tlt_library", TCL_GLOBAL_ONLY);
    if (libDir == NULL) {
	Tcl_AppendResult(interp, "couldn't find TLT script library:",
	    "global variable \"tlt_library\" doesn't exist", (char *)NULL);
	return TCL_ERROR;
    }
    Tcl_DStringInit(&dString);
    Tcl_DStringAppend(&dString, libDir, -1);
    Tcl_DStringAppend(&dString, "/", -1);
    Tcl_DStringAppend(&dString, fileName, -1);
    fileName = Tcl_DStringValue(&dString);
    Blt_Ps_VarAppend(ps, "\n% including file \"", fileName, "\"\n\n", 
	(char *)NULL);
    channel = Tcl_OpenFileChannel(interp, fileName, "r", 0);
    if (channel == NULL) {
	Tcl_AppendResult(interp, "couldn't open prologue file \"", fileName,
		 "\": ", Tcl_PosixError(interp), (char *)NULL);
	return TCL_ERROR;
    }
    for(;;) {
	nBytes = Tcl_Read(channel, buf, POSTSCRIPT_BUFSIZ);
	if (nBytes < 0) {
	    Tcl_AppendResult(interp, "error reading prologue file \"", 
		     fileName, "\": ", Tcl_PosixError(interp), 
		     (char *)NULL);
	    Tcl_Close(interp, channel);
	    Tcl_DStringFree(&dString);
	    return TCL_ERROR;
	}
	if (nBytes == 0) {
	    break;
	}
	buf[nBytes] = '\0';
	Blt_Ps_Append(ps, buf);
    }
    Tcl_DStringFree(&dString);
    Tcl_Close(interp, channel);
    return TCL_OK;
}

/*
 *---------------------------------------------------------------------------
 *
 * XColorToPostScript --
 *
 *	Convert the a XColor (from its RGB values) to a PostScript command.
 *	If a Tk color map variable exists, it will be consulted for a
 *	PostScript translation based upon the color name.
 *
 *	Maps an X color intensity (0 to 2^16-1) to a floating point value
 *	[0..1].  Many versions of Tk don't properly handle the the lower 8
 *	bits of the color intensity, so we can only consider the upper 8 bits.
 *
 * Results:
 *	The string representing the color mode is returned.
 *
 *---------------------------------------------------------------------------
 */
static void
XColorToPostScript(Blt_Ps ps, XColor *colorPtr)
{
    /* 
     * Shift off the lower byte before dividing because some versions of Tk
     * don't fill the lower byte correctly.
     */
    Blt_Ps_Format(ps, "%g %g %g",
	((double)(colorPtr->red >> 8) / 255.0),
	((double)(colorPtr->green >> 8) / 255.0),
	((double)(colorPtr->blue >> 8) / 255.0));
}

void
Blt_Ps_XSetBackground(PostScript *psPtr, XColor *colorPtr)
{
    /* If the color name exists in TCL array variable, use that translation */
    if ((psPtr->setupPtr != NULL) && (psPtr->setupPtr->colorVarName != NULL)) {
	const char *psColor;

	psColor = Tcl_GetVar2(psPtr->interp, psPtr->setupPtr->colorVarName,
	    Tk_NameOfColor(colorPtr), 0);
	if (psColor != NULL) {
	    Blt_Ps_VarAppend(psPtr, " ", psColor, "\n", (char *)NULL);
	    return;
	}
    }
    XColorToPostScript(psPtr, colorPtr);
    Blt_Ps_Append(psPtr, " setrgbcolor\n");
    if (psPtr->setupPtr->flags & PS_GREYSCALE) {
	Blt_Ps_Append(psPtr, " currentgray setgray\n");
    }
}

void
Blt_Ps_XSetForeground(PostScript *psPtr, XColor *colorPtr)
{
    /* If the color name exists in TCL array variable, use that translation */
    if ((psPtr->setupPtr != NULL) && (psPtr->setupPtr->colorVarName != NULL)) {
	const char *psColor;

	psColor = Tcl_GetVar2(psPtr->interp, psPtr->setupPtr->colorVarName,
	    Tk_NameOfColor(colorPtr), 0);
	if (psColor != NULL) {
	    Blt_Ps_VarAppend(psPtr, " ", psColor, "\n", (char *)NULL);
	    return;
	}
    }
    XColorToPostScript(psPtr, colorPtr);
    Blt_Ps_Append(psPtr, " setrgbcolor\n");
    if (psPtr->setupPtr->flags & PS_GREYSCALE) {
	Blt_Ps_Append(psPtr, " currentgray setgray\n");
    }
}

/*
 *---------------------------------------------------------------------------
 *
 * ReverseBits --
 *
 *	Convert a byte from a X image into PostScript image order.  This
 *	requires not only the nybbles to be reversed but also their bit
 *	values.
 *
 * Results:
 *	The converted byte is returned.
 *
 *---------------------------------------------------------------------------
 */
INLINE static unsigned char
ReverseBits(unsigned char byte)
{
    byte = ((byte >> 1) & 0x55) | ((byte << 1) & 0xaa);
    byte = ((byte >> 2) & 0x33) | ((byte << 2) & 0xcc);
    byte = ((byte >> 4) & 0x0f) | ((byte << 4) & 0xf0);
    return byte;
}

/*
 *---------------------------------------------------------------------------
 *
 * ByteToHex --
 *
 *	Convert a byte to its ASCII hexidecimal equivalent.
 *
 * Results:
 *	The converted 2 ASCII character string is returned.
 *
 *---------------------------------------------------------------------------
 */
INLINE static void
ByteToHex(unsigned char byte, char *string)
{
    static char hexDigits[] = "0123456789ABCDEF";

    string[0] = hexDigits[byte >> 4];
    string[1] = hexDigits[byte & 0x0F];
}

/*
 *---------------------------------------------------------------------------
 *
 * Blt_Ps_XSetBitmapData --
 *
 *      Output a PostScript image string of the given bitmap image.  It is
 *      assumed the image is one bit deep and a zero value indicates an
 *      off-pixel.  To convert to PostScript, the bits need to be reversed
 *      from the X11 image order.
 *
 * Results:
 *      None.
 *
 * Side Effects:
 *      The PostScript image string is appended to interp->result.
 *
 *---------------------------------------------------------------------------
 */
void
Blt_Ps_XSetBitmapData(Blt_Ps ps, Display *display, Pixmap bitmap, int w, int h)
{
    XImage *imagePtr;
    int byteCount;
    int y, bitPos;

    imagePtr = XGetImage(display, bitmap, 0, 0, w, h, 1, ZPixmap);
    Blt_Ps_Append(ps, "\t<");
    byteCount = bitPos = 0;	/* Suppress compiler warning */
    for (y = 0; y < h; y++) {
	unsigned char byte;
	char string[10];
	int x;

	byte = 0;
	for (x = 0; x < w; x++) {
	    unsigned long pixel;

	    pixel = XGetPixel(imagePtr, x, y);
	    bitPos = x % 8;
	    byte |= (unsigned char)(pixel << bitPos);
	    if (bitPos == 7) {
		byte = ReverseBits(byte);
		ByteToHex(byte, string);
		string[2] = '\0';
		byteCount++;
		byte = 0;
		if (byteCount >= 30) {
		    string[2] = '\n';
		    string[3] = '\t';
		    string[4] = '\0';
		    byteCount = 0;
		}
		Blt_Ps_Append(ps, string);
	    }
	}			/* x */
	if (bitPos != 7) {
	    byte = ReverseBits(byte);
	    ByteToHex(byte, string);
	    string[2] = '\0';
	    Blt_Ps_Append(ps, string);
	    byteCount++;
	}
    }				/* y */
    Blt_Ps_Append(ps, ">\n");
    XDestroyImage(imagePtr);
}

typedef struct {
    const char *alias;
    const char *fontName;
} FamilyMap;

static FamilyMap familyMap[] =
{
    { "Arial",		        "Helvetica"	   },
    { "AvantGarde",             "AvantGarde"       },
    { "Bookman",                "Bookman"          },
    { "Courier New",            "Courier"          },
    { "Courier",                "Courier"          },
    { "Geneva",                 "Helvetica"        },
    { "Helvetica",              "Helvetica"        },
    { "Mathematica1",		"Helvetica"	   },
    { "Monaco",                 "Courier"          },
    { "New Century Schoolbook", "NewCenturySchlbk" },
    { "New York",               "Times"            },
    { "Nimbus Roman No9 L"	"Times"		   },
    { "Nimbus Sans L Condensed","Helvetica"        },
    { "Nimbus Sans L",		"Helvetica"        },
    { "Palatino",               "Palatino"         },
    { "Standard Symbols L",	"Symbol"           },
    { "Swiss 721",              "Helvetica"        },
    { "Symbol",                 "Symbol"           },
    { "Times New Roman",        "Times"            },
    { "Times Roman",            "Times"            },
    { "Times",                  "Times"            },
    { "ZapfChancery",           "ZapfChancery"     },
    { "ZapfDingbats",           "ZapfDingbats"     }
};

static int nFamilyNames = (sizeof(familyMap) / sizeof(FamilyMap));

static const char *
FamilyToPsFamily(const char *family) 
{
    FamilyMap *fp, *fend;

    if (strncasecmp(family, "itc ", 4) == 0) {
	family += 4;
    }
    for (fp = familyMap, fend = fp + nFamilyNames; fp < fend; fp++) {
	if (strcasecmp(fp->alias, family) == 0) {
	    return fp->fontName;
	}
    }
    return NULL;
}

/*
 *---------------------------------------------------------------------------
 * Routines to convert X drawing functions to PostScript commands.
 *---------------------------------------------------------------------------
 */
void
Blt_Ps_SetClearBackground(Blt_Ps ps)
{
    Blt_Ps_Append(ps, "1 1 1 setrgbcolor\n");
}

void
Blt_Ps_XSetCapStyle(Blt_Ps ps, int capStyle)
{
    /*
     * X11:not last = 0, butt = 1, round = 2, projecting = 3
     * PS: butt = 0, round = 1, projecting = 2
     */
    if (capStyle > 0) {
	capStyle--;
    }
    Blt_Ps_Format(ps, "%d setlinecap\n", capStyle);
}

void
Blt_Ps_XSetJoinStyle(Blt_Ps ps, int joinStyle)
{
    /*
     * miter = 0, round = 1, bevel = 2
     */
    Blt_Ps_Format(ps, "%d setlinejoin\n", joinStyle);
}

void
Blt_Ps_XSetLineWidth(Blt_Ps ps, int lineWidth)
{
    if (lineWidth < 1) {
	lineWidth = 1;
    }
    Blt_Ps_Format(ps, "%d setlinewidth\n", lineWidth);
}

void
Blt_Ps_XSetDashes(Blt_Ps ps, Blt_Dashes *dashesPtr)
{

    Blt_Ps_Append(ps, "[ ");
    if (dashesPtr != NULL) {
	unsigned char *vp;

	for (vp = dashesPtr->values; *vp != 0; vp++) {
	    Blt_Ps_Format(ps, " %d", *vp);
	}
    }
    Blt_Ps_Append(ps, "] 0 setdash\n");
}

void
Blt_Ps_XSetLineAttributes(
    Blt_Ps ps,
    XColor *colorPtr,
    int lineWidth,
    Blt_Dashes *dashesPtr,
    int capStyle, 
    int joinStyle)
{
    Blt_Ps_XSetJoinStyle(ps, joinStyle);
    Blt_Ps_XSetCapStyle(ps, capStyle);
    Blt_Ps_XSetForeground(ps, colorPtr);
    Blt_Ps_XSetLineWidth(ps, lineWidth);
    Blt_Ps_XSetDashes(ps, dashesPtr);
    Blt_Ps_Append(ps, "/DashesProc {} def\n");
}

void
Blt_Ps_Rectangle(Blt_Ps ps, int x, int y, int width, int height)
{
    Blt_Ps_Append(ps, "newpath\n");
    Blt_Ps_Format(ps, "  %d %d moveto\n", x, y);
    Blt_Ps_Format(ps, "  %d %d rlineto\n", width, 0);
    Blt_Ps_Format(ps, "  %d %d rlineto\n", 0, height);
    Blt_Ps_Format(ps, "  %d %d rlineto\n", -width, 0);
    Blt_Ps_Append(ps, "closepath\n");
}

void
Blt_Ps_XFillRectangle(Blt_Ps ps, double x, double y, int width, int height)
{
    Blt_Ps_Rectangle(ps, (int)x, (int)y, width, height);
    Blt_Ps_Append(ps, "fill\n");
}

void
Blt_Ps_PolylineFromXPoints(Blt_Ps ps, XPoint *points, int n)
{
    XPoint *pp, *pend;

    pp = points;
    Blt_Ps_Append(ps, "newpath\n");
    Blt_Ps_Format(ps, "  %d %d moveto\n", pp->x, pp->y);
    pp++;
    for (pend = points + n; pp < pend; pp++) {
	Blt_Ps_Format(ps, "  %d %d lineto\n", pp->x, pp->y);
    }
}

void
Blt_Ps_Polyline(Blt_Ps ps, Point2d *screenPts, int nScreenPts)
{
    Point2d *pp, *pend;

    pp = screenPts;
    Blt_Ps_Append(ps, "newpath\n");
    Blt_Ps_Format(ps, "  %g %g moveto\n", pp->x, pp->y);
    for (pp++, pend = screenPts + nScreenPts; pp < pend; pp++) {
	Blt_Ps_Format(ps, "  %g %g lineto\n", pp->x, pp->y);
    }
}

void
Blt_Ps_Polygon(Blt_Ps ps, Point2d *screenPts, int nScreenPts)
{
    Point2d *pp, *pend;

    pp = screenPts;
    Blt_Ps_Append(ps, "newpath\n");
    Blt_Ps_Format(ps, "  %g %g moveto\n", pp->x, pp->y);
    for (pp++, pend = screenPts + nScreenPts; pp < pend; pp++) {
	Blt_Ps_Format(ps, "  %g %g lineto\n", pp->x, pp->y);
    }
    Blt_Ps_Format(ps, "  %g %g lineto\n", screenPts[0].x, screenPts[0].y);
    Blt_Ps_Append(ps, "closepath\n");
}

void
Blt_Ps_XFillPolygon(Blt_Ps ps, Point2d *screenPts, int nScreenPts)
{
    Blt_Ps_Polygon(ps, screenPts, nScreenPts);
    Blt_Ps_Append(ps, "fill\n");
}

void
Blt_Ps_XDrawSegments(Blt_Ps ps, XSegment *segments, int nSegments)
{
    XSegment *sp, *send;

    for (sp = segments, send = sp + nSegments; sp < send; sp++) {
	Blt_Ps_Format(ps, "%d %d moveto %d %d lineto\n", sp->x1, sp->y1, 
		      sp->x2, sp->y2);
	Blt_Ps_Append(ps, "DashesProc stroke\n");
    }
}


void
Blt_Ps_XFillRectangles(Blt_Ps ps, XRectangle *rectangles, int nRectangles)
{
    XRectangle *rp, *rend;

    for (rp = rectangles, rend = rp + nRectangles; rp < rend; rp++) {
	Blt_Ps_XFillRectangle(ps, (double)rp->x, (double)rp->y, 
		(int)rp->width, (int)rp->height);
    }
}

#ifndef TK_RELIEF_SOLID
#define TK_RELIEF_SOLID		-1	/* Set the an impossible value. */
#endif /* TK_RELIEF_SOLID */

void
Blt_Ps_Draw3DRectangle(
    Blt_Ps ps,
    Tk_3DBorder border,		/* Token for border to draw. */
    double x, double y,		/* Coordinates of rectangle */
    int width, int height,	/* Region to be drawn. */
    int borderWidth,		/* Desired width for border, in pixels. */
    int relief)			/* Should be either TK_RELIEF_RAISED or
                                 * TK_RELIEF_SUNKEN; indicates position of
                                 * interior of window relative to exterior. */
{
    Point2d points[7];
    TkBorder *borderPtr = (TkBorder *) border;
    XColor *lightPtr, *darkPtr;
    XColor *topPtr, *bottomPtr;
    XColor light, dark;
    int twiceWidth = (borderWidth * 2);

    if ((width < twiceWidth) || (height < twiceWidth)) {
	return;
    }
    if ((relief == TK_RELIEF_SOLID) ||
	(borderPtr->lightColorPtr == NULL) || (borderPtr->darkColorPtr == NULL)) {
	if (relief == TK_RELIEF_SOLID) {
	    dark.red = dark.blue = dark.green = 0x00;
	    light.red = light.blue = light.green = 0x00;
	    relief = TK_RELIEF_SUNKEN;
	} else {
	    light = *borderPtr->bgColorPtr;
	    dark.red = dark.blue = dark.green = 0xFF;
	}
	lightPtr = &light;
	darkPtr = &dark;
    } else {
	lightPtr = borderPtr->lightColorPtr;
	darkPtr = borderPtr->darkColorPtr;
    }


    /* Handle grooves and ridges with recursive calls. */

    if ((relief == TK_RELIEF_GROOVE) || (relief == TK_RELIEF_RIDGE)) {
	int halfWidth, insideOffset;

	halfWidth = borderWidth / 2;
	insideOffset = borderWidth - halfWidth;
	Blt_Ps_Draw3DRectangle(ps, border, (double)x, (double)y,
	    width, height, halfWidth, 
	    (relief == TK_RELIEF_GROOVE) ? TK_RELIEF_SUNKEN : TK_RELIEF_RAISED);
	Blt_Ps_Draw3DRectangle(ps, border, 
  	    (double)(x + insideOffset), (double)(y + insideOffset), 
	    width - insideOffset * 2, height - insideOffset * 2, halfWidth,
	    (relief == TK_RELIEF_GROOVE) ? TK_RELIEF_RAISED : TK_RELIEF_SUNKEN);
	return;
    }
    if (relief == TK_RELIEF_RAISED) {
	topPtr = lightPtr;
	bottomPtr = darkPtr;
    } else if (relief == TK_RELIEF_SUNKEN) {
	topPtr = darkPtr;
	bottomPtr = lightPtr;
    } else {
	topPtr = bottomPtr = borderPtr->bgColorPtr;
    }
    Blt_Ps_XSetBackground(ps, bottomPtr);
    Blt_Ps_XFillRectangle(ps, x, y + height - borderWidth, width, borderWidth);
    Blt_Ps_XFillRectangle(ps, x + width - borderWidth, y, borderWidth, height);
    points[0].x = points[1].x = points[6].x = x;
    points[0].y = points[6].y = y + height;
    points[1].y = points[2].y = y;
    points[2].x = x + width;
    points[3].x = x + width - borderWidth;
    points[3].y = points[4].y = y + borderWidth;
    points[4].x = points[5].x = x + borderWidth;
    points[5].y = y + height - borderWidth;
    if (relief != TK_RELIEF_FLAT) {
	Blt_Ps_XSetBackground(ps, topPtr);
    }
    Blt_Ps_XFillPolygon(ps, points, 7);
}

void
Blt_Ps_Fill3DRectangle(
    Blt_Ps ps,
    Tk_3DBorder border,		/* Token for border to draw. */
    double x, double y,		/* Coordinates of top-left of border area */
    int width, int height,	/* Dimension of border to be drawn. */
    int borderWidth,		/* Desired width for border, in pixels. */
    int relief)			/* Should be either TK_RELIEF_RAISED or
                                 * TK_RELIEF_SUNKEN;  indicates position of
                                 * interior of window relative to exterior. */
{
    TkBorder *borderPtr = (TkBorder *) border;

    Blt_Ps_XSetBackground(ps, borderPtr->bgColorPtr);
    Blt_Ps_XFillRectangle(ps, x, y, width, height);
    Blt_Ps_Draw3DRectangle(ps, border, x, y, width, height, borderWidth,
	relief);
}

void
Blt_Ps_XSetStipple(Blt_Ps ps, Display *display, Pixmap bitmap)
{
    int width, height;

    Tk_SizeOfBitmap(display, bitmap, &width, &height);
    Blt_Ps_Format(ps, 
	"gsave\n"
        "  clip\n"
        "  %d %d\n", 
	width, height);
    Blt_Ps_XSetBitmapData(ps, display, bitmap, width, height);
    Blt_Ps_VarAppend(ps, 
        "  StippleFill\n"
        "grestore\n", (char *)NULL);
}

/*
 *---------------------------------------------------------------------------
 *
 * Blt_Ps_XSetFont --
 *
 *      Map the Tk font to a PostScript font and point size.
 *
 *	If a TCL array variable was specified, each element should be indexed
 *	by the X11 font name and contain a list of 1-2 elements; the
 *	PostScript font name and the desired point size.  The point size may
 *	be omitted and the X font point size will be used.
 *
 *	Otherwise, if the foundry is "Adobe", we try to do a plausible mapping
 *	looking at the full name of the font and building a string in the form
 *	of "Family-TypeFace".
 *
 * Returns:
 *      None.
 *
 * Side Effects:
 *      PostScript commands are output to change the type and the point size
 *      of the current font.
 *
 *---------------------------------------------------------------------------
 */

void
Blt_Ps_XSetFont(PostScript *psPtr, Tk_Font font) 
{
#if 0
    Tcl_Interp *interp = psPtr->interp;
    const char *family;

    /* Use the font variable information if it exists. */
    if ((psPtr->setupPtr != NULL) && (psPtr->setupPtr->fontVarName != NULL)) {
	char *value;

	value = (char *)Tcl_GetVar2(interp, psPtr->setupPtr->fontVarName, 
		Tk_NameOfFont(font), 0);
	if (value != NULL) {
	    const char **argv = NULL;
	    int argc;
	    int newSize;
	    double pointSize;
	    const char *fontName;

	    if (Tcl_SplitList(NULL, value, &argc, &argv) != TCL_OK) {
		return;
	    }
	    fontName = argv[0];
	    if ((argc != 2) || 
		(Tcl_GetInt(interp, argv[1], &newSize) != TCL_OK)) {
		free(argv);
		return;
	    }
	    pointSize = (double)newSize;
	    Blt_Ps_Format(psPtr, "%g /%s SetFont\n", pointSize, 
		fontName);
	    free(argv);
	    return;
	}
	/*FallThru*/
    }

    /*
     * Check to see if it's a PostScript font. Tk_PostScriptFontName silently
     * generates a bogus PostScript font name, so we have to check to see if
     * this is really a PostScript font first before we call it.
     */
    family = FamilyToPsFamily(Blt_FamilyOfFont(font));
    if (family != NULL) {
	Tcl_DString dString;
	double pointSize;
	
	Tcl_DStringInit(&dString);
	pointSize = (double)Blt_PostscriptFontName(font, &dString);
	Blt_Ps_Format(psPtr, "%g /%s SetFont\n", pointSize, 
		Tcl_DStringValue(&dString));
	Tcl_DStringFree(&dString);
	return;
    }
    Blt_Ps_Append(psPtr, "12.0 /Helvetica-Bold SetFont\n");
#endif
}

#if 0
static void
TextLayoutToPostScript(Blt_Ps ps, int x, int y, TextLayout *textPtr)
{
    char *bp, *dst;
    int count;			/* Counts the # of bytes written to the
				 * intermediate scratch buffer. */
    const char *src, *end;
    TextFragment *fragPtr;
    int i;
    unsigned char c;
#if HAVE_UTF
    Tcl_UniChar ch;
#endif
    int limit;

    limit = POSTSCRIPT_BUFSIZ - 4; /* High water mark for scratch buffer. */
    fragPtr = textPtr->fragments;
    for (i = 0; i < textPtr->nFrags; i++, fragPtr++) {
	if (fragPtr->count < 1) {
	    continue;
	}
	Blt_Ps_Append(ps, "(");
	count = 0;
	dst = Blt_Ps_GetScratchBuffer(ps);
	src = fragPtr->text;
	end = fragPtr->text + fragPtr->count;
	while (src < end) {
	    if (count > limit) {
		/* Don't let the scatch buffer overflow */
		dst = Blt_Ps_GetScratchBuffer(ps);
		dst[count] = '\0';
		Blt_Ps_Append(ps, dst);
		count = 0;
	    }
#if HAVE_UTF
	    /*
	     * INTL: For now we just treat the characters as binary data and
	     * display the lower byte.  Eventually this should be revised to
	     * handle international postscript fonts.
	     */
	    src += Tcl_UtfToUniChar(src, &ch);
	    c = (unsigned char)(ch & 0xff);
#else 
	    c = *src++;
#endif

	    if ((c == '\\') || (c == '(') || (c == ')')) {
		/*
		 * If special PostScript characters characters "\", "(", and
		 * ")" are contained in the text string, prepend backslashes
		 * to them.
		 */
		*dst++ = '\\';
		*dst++ = c;
		count += 2;
	    } else if ((c < ' ') || (c > '~')) {
		/* Convert non-printable characters into octal. */
		sprintf_s(dst, 5, "\\%03o", c);
		dst += 4;
		count += 4;
	    } else {
		*dst++ = c;
		count++;
	    }
	}
	bp = Blt_Ps_GetScratchBuffer(ps);
	bp[count] = '\0';
	Blt_Ps_Append(ps, bp);
	Blt_Ps_Format(ps, ") %d %d %d DrawAdjText\n",
	    fragPtr->width, x + fragPtr->x, y + fragPtr->y);
    }
}
#endif

/*
 *---------------------------------------------------------------------------
 *
 * Blt_Ps_DrawText --
 *
 *      Output PostScript commands to print a text string. The string may be
 *      rotated at any arbitrary angle, and placed according the anchor type
 *      given. The anchor indicates how to interpret the window coordinates as
 *      an anchor for the text bounding box.
 *
 * Results:
 *      None.
 *
 * Side Effects:
 *      Text string is drawn using the given font and GC on the graph window
 *      at the given coordinates, anchor, and rotation
 *
 *---------------------------------------------------------------------------
 */
void
Blt_Ps_DrawText(
    Blt_Ps ps,
    const char *string,		/* String to convert to PostScript */
    TextStyle *tsPtr,		/* Text attribute information */
    double x, double y)		/* Window coordinates where to print text */
{
#if 0
    TextLayout *textPtr;
    Point2d t;

    if ((string == NULL) || (*string == '\0')) { /* Empty string, do nothing */
	return;
    }
    textPtr = Blt_Ts_CreateLayout(string, -1, tsPtr);
    {
	float angle;
	double rw, rh;
	
	angle = fmod(tsPtr->angle, (double)360.0);
	Blt_GetBoundingBox(textPtr->width, textPtr->height, angle, &rw, &rh, 
	(Point2d *)NULL);
	/*
	 * Find the center of the bounding box
	 */
	t = Blt_AnchorPoint(x, y, rw, rh, tsPtr->anchor); 
	t.x += rw * 0.5;
	t.y += rh * 0.5;
    }

    /* Initialize text (sets translation and rotation) */
    Blt_Ps_Format(ps, "%d %d %g %g %g BeginText\n", textPtr->width, 
    textPtr->height, tsPtr->angle, t.x, t.y);

    Blt_Ps_XSetFont(ps, tsPtr->font);

    Blt_Ps_XSetForeground(ps, tsPtr->color);
    TextLayoutToPostScript(ps, 0, 0, textPtr);
    free(textPtr);
    Blt_Ps_Append(ps, "EndText\n");
#endif
}

void
Blt_Ps_XDrawLines(Blt_Ps ps, XPoint *points, int n)
{
    int nLeft;

    if (n <= 0) {
	return;
    }
    for (nLeft = n; nLeft > 0; nLeft -= PS_MAXPATH) {
	int length;

	length = MIN(PS_MAXPATH, nLeft);
	Blt_Ps_PolylineFromXPoints(ps, points, length);
	Blt_Ps_Append(ps, "DashesProc stroke\n");
	points += length;
    }
}

void
Blt_Ps_DrawPolyline(Blt_Ps ps, Point2d *points, int nPoints)
{
    int nLeft;

    if (nPoints <= 0) {
	return;
    }
    for (nLeft = nPoints; nLeft > 0; nLeft -= PS_MAXPATH) {
	int length;

	length = MIN(PS_MAXPATH, nLeft);
	Blt_Ps_Polyline(ps, points, length);
	Blt_Ps_Append(ps, "DashesProc stroke\n");
	points += length;
    }
}

void
Blt_Ps_DrawBitmap(
    Blt_Ps ps,
    Display *display,
    Pixmap bitmap,		/* Bitmap to be converted to PostScript */
    double xScale, double yScale)
{
    int width, height;
    double sw, sh;

    Tk_SizeOfBitmap(display, bitmap, &width, &height);
    sw = (double)width * xScale;
    sh = (double)height * yScale;
    Blt_Ps_Append(ps, "  gsave\n");
    Blt_Ps_Format(ps, "    %g %g translate\n", sw * -0.5, sh * 0.5);
    Blt_Ps_Format(ps, "    %g %g scale\n", sw, -sh);
    Blt_Ps_Format(ps, "    %d %d true [%d 0 0 %d 0 %d] {", 
	width, height, width, -height, height);
    Blt_Ps_XSetBitmapData(ps, display, bitmap, width, height);
    Blt_Ps_Append(ps, "    } imagemask\n  grestore\n");
}

void
Blt_Ps_Draw2DSegments(Blt_Ps ps, Segment2d *segments, int nSegments)
{
    Segment2d *sp, *send;

    Blt_Ps_Append(ps, "newpath\n");
    for (sp = segments, send = sp + nSegments; sp < send; sp++) {
	Blt_Ps_Format(ps, "  %g %g moveto %g %g lineto\n", 
		sp->p.x, sp->p.y, sp->q.x, sp->q.y);
	Blt_Ps_Append(ps, "DashesProc stroke\n");
    }
}

void
Blt_Ps_FontName(const char *family, int flags, Tcl_DString *resultPtr)
{
    const char *familyName, *weightName, *slantName;
    int len;

    len = Tcl_DStringLength(resultPtr);

    familyName = FamilyToPsFamily(family);
    if (familyName == NULL) {
	Tcl_UniChar ch;
	char *src, *dest;
	int upper;

	/*
	 * Inline, capitalize the first letter of each word, lowercase the
	 * rest of the letters in each word, and then take out the spaces
	 * between the words.  This may make the DString shorter, which is
	 * safe to do.
	 */
	Tcl_DStringAppend(resultPtr, family, -1);
	src = dest = Tcl_DStringValue(resultPtr) + len;
	upper = TRUE;
	while (*src != '\0') {
	    while (isspace(*src)) { /* INTL: ISO space */
		src++;
		upper = TRUE;
	    }
	    src += Tcl_UtfToUniChar(src, &ch);
	    if (upper) {
		ch = Tcl_UniCharToUpper(ch);
		upper = FALSE;
	    } else {
	        ch = Tcl_UniCharToLower(ch);
	    }
	    dest += Tcl_UniCharToUtf(ch, dest);
	}
	*dest = '\0';
	Tcl_DStringSetLength(resultPtr, dest - Tcl_DStringValue(resultPtr));
	familyName = Tcl_DStringValue(resultPtr) + len;
    }
    if (familyName != Tcl_DStringValue(resultPtr) + len) {
	Tcl_DStringAppend(resultPtr, familyName, -1);
	familyName = Tcl_DStringValue(resultPtr) + len;
    }
    if (strcasecmp(familyName, "NewCenturySchoolbook") == 0) {
	Tcl_DStringSetLength(resultPtr, len);
	Tcl_DStringAppend(resultPtr, "NewCenturySchlbk", -1);
	familyName = Tcl_DStringValue(resultPtr) + len;
    }

    /* Get the string to use for the weight. */
    weightName = NULL;
    if (flags & FONT_BOLD) {
	if ((strcmp(familyName, "Bookman") == 0) || 
	    (strcmp(familyName, "AvantGarde") == 0)) {
	    weightName = "Demi";
	} else {
	    weightName = "Bold";
	}
    } else {
	if (strcmp(familyName, "Bookman") == 0) {
	    weightName = "Light";
	} else if (strcmp(familyName, "AvantGarde") == 0) {
	    weightName = "Book";
	} else if (strcmp(familyName, "ZapfChancery") == 0) {
	    weightName = "Medium";
	}
    }

    /* Get the string to use for the slant. */
    slantName = NULL;
    if (flags & FONT_ITALIC) {
	if ((strcmp(familyName, "Helvetica") == 0) || 
	    (strcmp(familyName, "Courier") == 0) || 
	    (strcmp(familyName, "AvantGarde") == 0)) {
	    slantName = "Oblique";
	} else {
	    slantName = "Italic";
	}
    }

    /*
     * The string "Roman" needs to be added to some fonts that are not bold
     * and not italic.
     */
    if ((slantName == NULL) && (weightName == NULL)) {
	if ((strcmp(familyName, "Times") == 0) || 
	    (strcmp(familyName, "NewCenturySchlbk") == 0) || 
	    (strcmp(familyName, "Palatino") == 0)) {
	    Tcl_DStringAppend(resultPtr, "-Roman", -1);
	}
    } else {
	Tcl_DStringAppend(resultPtr, "-", -1);
	if (weightName != NULL) {
	    Tcl_DStringAppend(resultPtr, weightName, -1);
	}
	if (slantName != NULL) {
	    Tcl_DStringAppend(resultPtr, slantName, -1);
	}
    }
}