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magic/plot/plotPNM.c

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/*
* plotPNM.c --
*
* This file contains procedures that generate PNM format files
* to describe a section of layout.
*
* *********************************************************************
* * Copyright (C) 2000 Cornell University *
* * Permission to use, copy, modify, and distribute this *
* * software and its documentation for any purpose and without *
* * fee is hereby granted, provided that the above copyright *
* * notice appear in all copies. Cornell University *
* * makes no representations about the suitability of this *
* * software for any purpose. It is provided "as is" without *
* * express or implied warranty. Export of this software outside *
* * of the United States of America may require an export license. *
* *********************************************************************
*
* R. Timothy Edwards
* Copyright (C) 2004
* MultiGiG, Inc.
* Scotts Valley, CA
*
* Cleaned up the code, including optimization for speed
* Added: Non-Manhattan geometry handling, 24-bit color,
* plot styles automatically generated from display styles,
* downsampling for large plots, extended syntax for the
* technology file description.
*/
#ifndef lint
static char rcsid[] __attribute__ ((unused)) = "$Header: /usr/cvsroot/magic-8.0/plot/plotPNM.c,v 1.3 2010/06/24 12:37:25 tim Exp $";
#endif /* not lint */
#include <stdio.h>
#include <string.h>
#include <math.h>
/* C99 compat */
#include <stdlib.h>
#include "utils/magic.h"
#include "utils/geometry.h"
#include "utils/geofast.h"
#include "tiles/tile.h"
#include "utils/hash.h"
#include "database/database.h"
#include "utils/tech.h"
#include "utils/malloc.h"
#include "utils/utils.h"
#include "utils/styles.h"
#include "windows/windows.h"
#include "graphics/graphics.h"
#include "dbwind/dbwtech.h"
#include "dbwind/dbwind.h"
#include "utils/main.h"
#include "commands/commands.h"
#include "textio/textio.h"
#include "utils/signals.h"
#include "plot/plotInt.h"
#define LANCZOS_KERNEL_SIZE 1024
#define PI 3.14159265
/* Structure for saving R, G, B components of colors */
/* from a non-default colormap. */
typedef struct _pnmcolor {
unsigned char r, g, b;
} pnmcolor;
pnmcolor *PNMcolors = NULL;
static int ncolors = 0;
#define PIXELSZ sizeof(pnmcolor)
int PlotPNMmaxmem = 64 * 1024; /* 64MB */
int PlotPNMdownsample = 0; /* No downsampling by default */
unsigned char PlotPNMBG = 0xff; /* White background by default */
#ifdef VERSATEC
bool PlotPNMRTL = FALSE; /* If true, filter output through HP driver */
#endif
/*
* Local variables, modified/shared by callbacks.
*/
int Init_Error;
float lk[2 * LANCZOS_KERNEL_SIZE + 1];
int *lkstep; /* lanczos kernel steps */
pnmcolor *rtile;
int tile_xsize, tile_ysize;
int ds_xsize, ds_ysize;
Rect bb;
unsigned long BBinit;
int tile_yshift, tile_xshift;
int im_x, im_y;
int im_yoffset;
int y_pixels;
/* Structure for saving styles that are different from */
/* the styles loaded for this technology. */
typedef struct _dstyle {
char *name;
int init;
unsigned int wmask;
pnmcolor color;
} dstyle;
dstyle *Dstyles = NULL;
static int ndstyles = 0;
/* Structure which records how to paint a tile type. */
typedef struct _pstyle {
unsigned int wmask;
pnmcolor color;
} pstyle;
pstyle *PaintStyles = NULL;
/* Forward declarations */
extern void PlotLoadStyles();
extern void PlotLoadColormap();
extern pnmcolor PNMColorBlend();
extern pnmcolor PNMColorIndexAndBlend();
/*
* ----------------------------------------------------------------------------
*
* Function for output of PNM line data to HPRTL format
*
* ----------------------------------------------------------------------------
*/
#ifdef VERSATEC
struct plotRTLdata {
FILE *outfile;
unsigned char *outbytes;
};
int
pnmRTLLineFunc(linebuffer, arg)
unsigned char *linebuffer;
struct plotRTLdata *arg;
{
int size;
size = PlotRTLCompress(linebuffer, arg->outbytes, im_x * 3);
fprintf(arg->outfile, "\033*b%dW", size);
fwrite(arg->outbytes, size, 1, arg->outfile);
return 0;
}
#endif
/*
* ----------------------------------------------------------------------------
*
* Function for output of PNM line data to file fp
*
* ----------------------------------------------------------------------------
*/
int
pnmLineFunc(linebuffer, fp)
unsigned char *linebuffer;
FILE *fp;
{
fwrite(linebuffer, im_x * 3, 1, fp);
return 0;
}
/*
* ----------------------------------------------------------------------------
*
* pnmRenderRegion --
*
* Antialiased rendering.
*
* Results:
* None.
*
* Side effects:
* Writes output to file.
*
* ----------------------------------------------------------------------------
*/
void
pnmRenderRegion(scale, scale_over_2, normal, temp, func, arg)
float scale;
int scale_over_2;
float normal; /* normalizing factor */
float *temp; /* passed so we don't have to allocate it
* on every call.
*/
int (*func)(); /* Function to call per line of output */
ClientData arg; /* Arguments to function */
{
int i, j;
int jmax;
int x, y;
int dx, dy;
int ds_over_2;
pnmcolor *color;
float r, g, b;
unsigned char *linebuffer, *lineptr;
jmax = MIN(y_pixels, im_yoffset + 1);
ds_over_2 = scale_over_2 >> PlotPNMdownsample;
linebuffer = mallocMagic(im_x * 3);
/* x, y : pixel coords */
if (ds_over_2 == 0)
{
for (j = 0; j < jmax; j++)
{
lineptr = linebuffer;
y = scale * (y_pixels - 1 - j);
y >>= PlotPNMdownsample;
for (i = 0; i < im_x; i++)
{
x = scale * i;
x >>= PlotPNMdownsample;
color = rtile + x + y * ds_xsize;
*lineptr++ = color->r;
*lineptr++ = color->g;
*lineptr++ = color->b;
}
(*func)(linebuffer, arg);
}
}
else
{
/* When the scale is small enough, we have to resort to antialiasing */
float lkval;
int tidx;
for (j = 0; j < jmax; j++) {
y = scale_over_2 + scale * (y_pixels - 1 - j);
y >>= PlotPNMdownsample;
lineptr = linebuffer;
for (i = 0; i < im_x; i++) {
x = scale_over_2 + scale * i;
x >>= PlotPNMdownsample;
for (dx = -ds_over_2; dx < ds_over_2; dx++)
{
r = 0.0; g = 0.0; b = 0.0;
for (dy = -ds_over_2; dy < ds_over_2; dy++)
{
if (dy + y >= ds_ysize) continue;
/* grab rgb for (x + dx, y + dy) */
color = rtile + (x + dx) + (y + dy) * ds_xsize;
lkval = lk[lkstep[dy + ds_over_2]];
r += (float)color->r * lkval;
g += (float)color->g * lkval;
b += (float)color->b * lkval;
}
tidx = 3 * (dx + ds_over_2);
temp[tidx++] = r;
temp[tidx++] = g;
temp[tidx] = b;
}
r = 0.0; g = 0.0; b = 0.0;
for (dx = 0; dx < 2 * ds_over_2; dx++)
{
tidx = 3 * dx;
lkval = lk[lkstep[dx]];
r += temp[tidx++] * lkval;
g += temp[tidx++] * lkval;
b += temp[tidx] * lkval;
}
r /= normal;
g /= normal;
b /= normal;
*lineptr++ = (unsigned char)r;
*lineptr++ = (unsigned char)g;
*lineptr++ = (unsigned char)b;
}
(*func)(linebuffer, arg);
}
}
freeMagic(linebuffer);
}
/*
* ----------------------------------------------------------------------------
*
* pnmBBOX --
*
* Callback for DBTreeSrTiles; compute bounding box of plot
*
* Results:
* Always return 0 to keep search going.
*
* Side effects:
* Modifies BBinit, updates bounding box "bb"
*
* ----------------------------------------------------------------------------
*/
int
pnmBBOX (tile,cxp)
Tile *tile;
TreeContext *cxp;
{
Rect targetRect, sourceRect;
SearchContext *scx = cxp->tc_scx;
Rect *arg;
TileType type;
if (!IsSplit(tile))
if ((type = TiGetType(tile)) == TT_SPACE)
return 0;
/* grab rectangle from tile */
TITORECT(tile, &targetRect);
/* coordinate transform */
GEOTRANSRECT(&scx->scx_trans, &targetRect, &sourceRect);
/* Clip */
arg = (Rect *)cxp->tc_filter->tf_arg;
GEOCLIP(&sourceRect, arg);
/* compute bbox */
if (!BBinit)
bb = sourceRect;
else
{
bb.r_xbot = MIN(bb.r_xbot, sourceRect.r_xbot);
bb.r_ybot = MIN(bb.r_ybot, sourceRect.r_ybot);
bb.r_xtop = MAX(bb.r_xtop, sourceRect.r_xtop);
bb.r_ytop = MAX(bb.r_ytop, sourceRect.r_ytop);
}
BBinit = 1;
return 0;
}
/*
* ----------------------------------------------------------------------------
*
* pnmTile --
*
* Callback for DBTreeSrTiles; paints tiles in the current rtile buffer.
*
* Results:
* Return 0 to keep search going unless an error condition was
* encountered.
*
* Side effects:
* Modifies rtile array.
*
* ----------------------------------------------------------------------------
*/
int
pnmTile (tile, cxp)
Tile *tile;
TreeContext *cxp;
{
SearchContext *scx = cxp->tc_scx;
Rect targetRect, sourceRect, *clipRect;
int type, j, x, y, dx, dy;
pnmcolor *t;
pnmcolor col;
if ((type = (int)TiGetTypeExact(tile)) == TT_SPACE)
return 0;
/* undefined type; paint nothing */
if (!IsSplit(tile))
if (PaintStyles[type].wmask == 0) return 0;
/* grab rectangle from tile */
TITORECT(tile, &targetRect);
/* coordinate transform */
GEOTRANSRECT(&scx->scx_trans, &targetRect, &sourceRect);
/* Clip */
clipRect = (Rect *)cxp->tc_filter->tf_arg;
/* Handle non-Manhattan geometry */
if (IsSplit(tile))
{
TileType dinfo;
int w, h, llx, lly, urx, ury;
Rect scaledClip;
type = (SplitSide(tile)) ? SplitRightType(tile) : SplitLeftType(tile);
if (type == TT_SPACE) return 0;
else if (PaintStyles[type].wmask == 0) return 0;
llx = sourceRect.r_xbot - tile_xshift;
lly = sourceRect.r_ybot - tile_yshift;
llx >>= PlotPNMdownsample;
lly >>= PlotPNMdownsample;
dx = sourceRect.r_xtop - sourceRect.r_xbot;
dy = sourceRect.r_ytop - sourceRect.r_ybot;
dx >>= PlotPNMdownsample;
dy >>= PlotPNMdownsample;
urx = llx + dx;
ury = lly + dy;
col = PaintStyles[type].color;
scaledClip = *clipRect;
scaledClip.r_xbot -= tile_xshift;
scaledClip.r_xtop -= tile_xshift;
scaledClip.r_ybot -= tile_yshift;
scaledClip.r_ytop -= tile_yshift;
scaledClip.r_xbot >>= PlotPNMdownsample;
scaledClip.r_xtop >>= PlotPNMdownsample;
scaledClip.r_ybot >>= PlotPNMdownsample;
scaledClip.r_ytop >>= PlotPNMdownsample;
/* The following structures could be much better */
/* written for considerable speedup. . . */
dinfo = DBTransformDiagonal(TiGetTypeExact(tile), &scx->scx_trans);
if (((dinfo & TT_SIDE) >> 1) != (dinfo & TT_DIRECTION))
{
/* work top to bottom */
for (y = ury - 1; y >= lly; y--)
{
if (y >= scaledClip.r_ytop) continue;
else if (y < scaledClip.r_ybot) break;
if (dinfo & TT_SIDE) /* work right to left */
{
for (x = urx - 1; x >= llx; x--)
{
if (x >= scaledClip.r_xtop) continue;
else if (x < scaledClip.r_xbot) break;
if (((urx - x) * dy) > ((ury - y) * dx)) break;
t = rtile + x + ds_xsize * y;
*t = PNMColorBlend(t, &col);
}
}
else /* work left to right */
{
for (x = llx; x < urx; x++)
{
if (x < scaledClip.r_xbot) continue;
else if (x >= scaledClip.r_xtop) break;
if (((x - llx) * dy) > ((ury - y) * dx)) break;
t = rtile + x + ds_xsize * y;
*t = PNMColorBlend(t, &col);
}
}
}
}
else /* work bottom to top */
{
for (y = lly; y < ury; y++)
{
if (y < scaledClip.r_ybot) continue;
else if (y >= scaledClip.r_ytop) break;
if (dinfo & TT_SIDE) /* work right to left */
{
for (x = urx; x >= llx; x--)
{
if (x >= scaledClip.r_xtop) continue;
else if (x < scaledClip.r_xbot) break;
if (((urx - x) * dy) > ((y - lly) * dx)) break;
t = rtile + x + ds_xsize * y;
*t = PNMColorBlend(t, &col);
}
}
else /* work left to right */
{
for (x = llx; x < urx; x++)
{
if (x < scaledClip.r_xbot) continue;
else if (x >= scaledClip.r_xtop) break;
if (((x - llx) * dy) > ((y - lly) * dx)) break;
t = rtile + x + ds_xsize * y;
*t = PNMColorBlend(t, &col);
}
}
}
}
return 0;
}
GEOCLIP(&sourceRect, clipRect);
/* paint rectangle */
x = sourceRect.r_xbot - tile_xshift;
y = sourceRect.r_ybot - tile_yshift;
/* stop the search on an error condition */
/* (this should not happen---is guaranteed by GEOCLIP */
if ((x < 0) || (y < 0) || (x >= tile_xsize) || (y >= tile_ysize))
return 1;
x >>= PlotPNMdownsample;
y >>= PlotPNMdownsample;
dx = sourceRect.r_xtop - sourceRect.r_xbot;
dy = sourceRect.r_ytop - sourceRect.r_ybot;
dx >>= PlotPNMdownsample;
dy >>= PlotPNMdownsample;
col = PaintStyles[type].color;
t = rtile + x + ds_xsize * y;
for ( ; dy > 0; dy--)
{
for (j = 0; j < dx; j++)
{
*t = PNMColorBlend(t, &col);
t++;
}
t = t - dx + ds_xsize;
}
/* Continue search function */
return 0;
}
/*
* ----------------------------------------------------------------------------
*
* PlotPNM --
*
* This procedure generates a PNM file to describe an area of
* a layout.
*
* Results:
* None.
*
* Side effects:
* None.
*
* ----------------------------------------------------------------------------
*/
void
PlotPNM(fileName, scx, layers, xMask, width)
char *fileName; /* Name of PNM file to write. */
SearchContext *scx; /* The use and area and transformation
* in this describe what to plot.
*/
TileTypeBitMask *layers; /* Tells what layers to plot. Only
* paint layers in this mask, and also
* expanded according to xMask, are
* plotted. If L_LABELS is set, then
* labels on the layers are also
* plotted, if expanded according to
* xMask. If L_CELL is set, then
* subcells that are unexpanded
* according to xMask are plotted as
* bounding boxes.
*/
int xMask; /* An expansion mask, used to indicate
* the window whose expansion status
* will be used to determine
* visibility. Zero means treat
* everything as expanded.
*/
int width; /* Indicates the width of the
* plot, in pixels.
*/
{
FILE *fp = NULL;
Rect bbox;
int bb_ysize, bb_xsize;
int i, x, y, tile_ydelta;
int save_ds, iter;
int scale_over_2, ds_over_2;
float *strip = NULL;
float scale, invscale, scaledown, normal;
#ifdef VERSATEC
struct plotRTLdata rtl_args;
char command[200], tempFile[200];
#endif
// Sanity check on PaintStyles---may be NULL if plot section
// was missing from techfile. If so, run default init/final
// procedures, flag a warning, and continue.
if (PaintStyles == NULL)
{
TxError ("Warning: No plot section in techfile, using defaults.\n");
PlotPNMTechInit();
PlotPNMTechFinal();
}
if (width <= 0)
{
TxError ("PNM module given negative pixel width; cannot plot\n");
return;
}
if (Init_Error)
{
TxError ("PNM module initialization had failed; cannot plot\n");
return;
}
/* image:
* -----
* | xxx |
* | xxx |
* | xxx |
* -----
*
* Use -scale/2 to scale/2 magic coordinates for each output pixel.
*
*/
/* Rendering Tile:
*
* 0.. bbox size + 2 * scale_over_2.
*
* To sample, pixel (i,j) will be at:
* (scale_over_2 + scale*i, scale_over_2 + scale*j)
*
* Given an initial pixel position at (i,j), we sample from
* -scale_over_2 to scale_over_2
*/
/* Compute bounding box size in lambda */
BBinit = 0;
DBTreeSrTiles(scx, layers, xMask, pnmBBOX, (ClientData)&scx->scx_area);
/* Initial bounding box size */
bb_ysize = bb.r_ytop - bb.r_ybot;
bb_xsize = bb.r_xtop - bb.r_xbot;
/* Determine value of "scale" from the total pixel width. */
scale = (float)bb_xsize / (float)width;
invscale = 1.0 / scale;
scale = 1.0 / invscale;
if ((scale > 2) || (invscale != ceil(invscale)))
scale_over_2 = (int) ceil(scale / 2.0);
else
scale_over_2 = 0;
/* bump search context by scale_over_2 pixels on each side */
scx->scx_area.r_xbot = bb.r_xbot - scale_over_2;
scx->scx_area.r_ybot = bb.r_ybot - scale_over_2;
scx->scx_area.r_xtop = bb.r_xtop + scale_over_2;
scx->scx_area.r_ytop = bb.r_ytop + scale_over_2;
/* Recalculate bounding box with extended boundary */
bb_ysize = bb.r_ytop - bb.r_ybot;
bb_xsize = bb.r_xtop - bb.r_xbot;
tile_xsize = bb_xsize + 2 * scale_over_2;
/* check for empty region */
if (BBinit == 0 || tile_xsize <= 0 || bb_ysize <= 0)
{
TxPrintf ("Empty region, no plot\n");
return;
}
/*
* Compute memory requirements; a single pixel line needs a tile
* that has size "xsize" by "scale." To keep inter-tile overlap low,
* we insist that a single tile must have at least 3*scale pixels in
* it.
*/
save_ds = PlotPNMdownsample;
while ((PlotPNMmaxmem * 1024) <
((3 * scale + 2 * scale_over_2) * PIXELSZ * tile_xsize)
/ (1 << (PlotPNMdownsample * 2)))
PlotPNMdownsample++;
if (PlotPNMdownsample != save_ds)
{
TxPrintf ("%dX downsampling forced by memory size requirements.\n",
PlotPNMdownsample);
TxPrintf ("Current: %d KB; Required for non-downsampled image: %d KB\n",
PlotPNMmaxmem, (int) (1023 + ((3 * scale + 2 * scale_over_2)
* PIXELSZ * tile_xsize) / 1024) / (1 << (save_ds * 2)));
TxPrintf ("Use \"plot parameter pnmmaxmem\" to increase allocation.\n");
}
/*
* Compute the maximum y size for a tile.
*/
tile_ysize = PlotPNMmaxmem * 1024 / (PIXELSZ * tile_xsize);
tile_ydelta = (tile_ysize - scale_over_2 * 2);
/* Determine the amount shifted in Y for each consecutively */
/* computed region. */
/* tile_ydelta is the amount of shift in magic units. */
/* y_pixels is the amount of shift in PNM pixels. */
/* tile_ydelta MUST EQUAL y_pixels * scale. If not, then */
/* we need to back-compute a better tile_ysize value. */
y_pixels = tile_ydelta / scale;
if (y_pixels == 0) y_pixels = 1;
if (y_pixels * scale != tile_ydelta)
{
tile_ydelta = scale * y_pixels;
tile_ysize = tile_ydelta + (scale_over_2 * 2);
}
/* If there's enough memory allocation, tile_ysize bounds the whole plot */
if (tile_ysize > (bb_ysize + 2 * scale_over_2))
{
tile_ysize = bb_ysize + 2 * scale_over_2;
tile_ydelta = bb_ysize;
y_pixels = tile_ydelta / scale;
}
ds_xsize = tile_xsize >> PlotPNMdownsample;
ds_ysize = tile_ysize >> PlotPNMdownsample;
ds_over_2 = scale_over_2 >> PlotPNMdownsample;
rtile = (pnmcolor *) mallocMagic((ds_xsize * ds_ysize) * PIXELSZ);
/* bump search context by scale_over_2 pixels on each side */
scx->scx_area.r_ybot = scx->scx_area.r_ytop - tile_ysize;
tile_yshift = scx->scx_area.r_ybot;
tile_xshift = scx->scx_area.r_xbot;
im_x = (int)(bb_xsize / scale);
im_y = (int)(bb_ysize / scale);
#ifdef VERSATEC
if (PlotPNMRTL)
{
if (fileName == NULL)
{
int result;
sprintf(tempFile, "%s/magicPlotXXXXXX", PlotTempDirectory);
result = mkstemp(tempFile);
if (result == -1)
{
TxError("Failed to create temporary filename for %s\n", tempFile);
return;
}
fileName = tempFile;
}
else if (strchr(fileName, '.') == NULL)
{
/* Add extention ".pnm" if the filename does not have an extension */
sprintf(tempFile, "%s.pnm", fileName);
fileName = tempFile;
}
rtl_args.outfile = PaOpen(fileName, "w", (char *)NULL, ".",
(char *)NULL, (char **)NULL);
if (rtl_args.outfile == NULL)
{
TxError("Couldn't open file \"%s\" to write plot.\n", fileName);
return;
}
switch (PlotVersPlotType)
{
case HPGL2: /* Write HPGL2 header */
/* Universal Command Language. */
fprintf(rtl_args.outfile, "\033%%-12345X");
/* Reset printer; set HPGL2 mode. */
fprintf(rtl_args.outfile, "@PJL ENTER LANGUAGE=HPGL2\r\n");
fprintf(rtl_args.outfile, "\033E\033%%0B");
/* Declare name; disable auto-rotate */
fprintf(rtl_args.outfile, "BP1,\"MAGIC\",5,1;");
/* Enter RTL mode. */
fprintf(rtl_args.outfile, "\033%%0A");
/* Source mode opaque */
fprintf(rtl_args.outfile, "\033*v1N");
/* Drop through */
case HPRTL: /* Write HPRTL header */
/* Direct pixel mode, 8 bits/component */
fwrite("\033*v6W\000\003\010\010\010\010", 11, 1, rtl_args.outfile);
/* Image width in pixels. */
fprintf(rtl_args.outfile, "\033*r%dS", im_x);
/* Image height in pixels.*/
fprintf(rtl_args.outfile, "\033*r%dT", im_y);
/* No negative motion. */
fprintf(rtl_args.outfile, "\033&a1N");
/* Mode 2 row compression */
/* But, we REALLY ought to have delta row compression here. . . */
fprintf(rtl_args.outfile, "\033*b2M");
/* Printer resolution in DPI */
fprintf(rtl_args.outfile, "\033*t%dR", PlotVersDotsPerInch);
/* Start raster data */
fprintf(rtl_args.outfile, "\033*r%cA",
(PlotVersPlotType == HPGL2) ? '1' : '0');
break;
}
/* Reserve enough space for run-length encoding compression */
rtl_args.outbytes = mallocMagic((im_x * 3) + ((im_x * 3) / 127) + 1);
}
else
#endif
{
/* open PNM file */
fp = PaOpen (fileName, "w",
(strchr(fileName, '.') == NULL) ? ".pnm" : NULL,
".", NULL, NULL);
if (fp == NULL)
{
TxError ("Could not open file `%s' for writing\n", fileName);
goto done;
}
fprintf (fp, "P6\n");
fprintf (fp, "%d %d\n", im_x, im_y);
fprintf (fp, "255\n");
}
im_yoffset = im_y - 1;
TxPrintf ("PNM image dimensions: %d x %d\n", im_x, im_y);
#if 0
TxPrintf ("Region size: %d x %d\n", tile_xsize, tile_ysize);
TxPrintf ("Pixels per region: %d\n", y_pixels);
TxPrintf ("Scale: %g\n", scale);
TxPrintf ("Antialiasing overlap: %d\n", scale_over_2);
if (PlotPNMdownsample > 0)
{
TxPrintf ("Downsampling: %d\n", PlotPNMdownsample);
TxPrintf ("Downsampled region size: %d x %d\n", ds_xsize, ds_ysize);
}
#endif
strip = (float *) mallocMagic((unsigned) (ds_over_2 * 2 * 3 * sizeof(float)));
lkstep = (int *) mallocMagic((unsigned) (ds_over_2 * 2 * sizeof(int)));
scaledown = scale / (2 * (1 << PlotPNMdownsample));
for (x = -ds_over_2; x < ds_over_2; x++)
{
lkstep[ds_over_2 + x] = ((float)ABS(x)) / scaledown * LANCZOS_KERNEL_SIZE;
if (lkstep[ds_over_2 + x] >= LANCZOS_KERNEL_SIZE)
lkstep[ds_over_2 + x] = LANCZOS_KERNEL_SIZE - 1;
}
/* Compute the normalization factor (what to divide by after adding up the */
/* weighted values of all pixels in the kernel area). */
normal = 0.0;
for (x = 0; x < 2 * ds_over_2; x++)
for (y = 0; y < 2 * ds_over_2; y++)
normal += lk[lkstep[x]] * lk[lkstep[y]];
iter = 0;
while (im_yoffset >= 0)
{
/* If this is a slow rendering, then we'll announce */
/* the progress every 20 steps. */
if ((++iter) % 10 == 0)
{
TxPrintf("%g%% done\n",
100 * (float)(im_y - im_yoffset + 1) / (float)im_y);
TxFlushOut();
}
/* Clear tile memory with the background gray level */
memset((void *)rtile, PlotPNMBG,
(size_t)ds_xsize * ds_ysize * PIXELSZ);
if (SigInterruptPending)
{
TxPrintf (" *** interrupted ***\n");
goto done;
}
/* Use the "UniqueTiles" function to avoid painting contacts twice */
DBTreeSrUniqueTiles(scx, layers, xMask, pnmTile, (ClientData)&scx->scx_area);
/* anti-aliased rendering */
#ifdef VERSATEC
if (PlotPNMRTL)
pnmRenderRegion(scale, scale_over_2, normal, strip, pnmRTLLineFunc,
(ClientData)(&rtl_args));
else
#endif
pnmRenderRegion(scale, scale_over_2, normal, strip, pnmLineFunc,
(ClientData)fp);
/* advance to the next strip */
im_yoffset -= y_pixels; /* in output coords */
tile_yshift -= tile_ydelta; /* in magic coords */
scx->scx_area.r_ybot -= tile_ydelta;
scx->scx_area.r_ytop -= tile_ydelta;
}
/* TxPrintf ("Save to file `%s', scale = %f\n", fileName, scale);*/
#ifdef VERSATEC
if (PlotPNMRTL)
{
switch (PlotVersPlotType)
{
case HPRTL:
PlotHPRTLTrailer(rtl_args.outfile);
break;
case HPGL2:
PlotHPGL2Trailer(rtl_args.outfile);
break;
}
fflush(rtl_args.outfile);
fclose(rtl_args.outfile);
rtl_args.outfile = NULL;
freeMagic(rtl_args.outbytes);
/* Run spooler */
sprintf(command, PlotVersCommand, PlotVersPrinter, fileName);
if (system(command) != 0)
{
TxError("Couldn't execute spooler command to print \"%s\"\n",
fileName);
}
}
else
#endif
{
if(fp)
{
fclose (fp);
fp = NULL;
}
}
done:
PlotPNMdownsample = save_ds;
freeMagic(rtile);
rtile = NULL;
freeMagic(strip);
freeMagic(lkstep);
lkstep = NULL;
#ifdef VERSATEC
if(rtl_args.outfile) /* theoretical fp leak */
{
fclose(rtl_args.outfile);
rtl_args.outfile = NULL;
}
#endif
if(fp)
fclose(fp);
return;
}
/*
* ----------------------------------------------------------------------------
*
* lanczos_kernel --
*
* Compute the value of the lanczos kernel at the given position.
*
*
* Results:
* Returns kernel value at arg x.
*
* Side effects:
* None.
*
* ----------------------------------------------------------------------------
*/
float lanczos_kernel(i, n)
int i, n;
{
double x; /* position at which to evaluate the lanczos kernel */
if (i == 0)
return (float)1.0;
else
x = (double)i / (double)n;
return (float)(sin(PI * x) / (PI * x)) * (sin(PI * 0.5 * x) / (PI * 0.5 * x));
}
/*
* ----------------------------------------------------------------------------
* Color blending functions.
*
* PNMColorBlend blends two colors denoted by R, G, B components (0-255).
* "c_have" is the color that is already present, and "c_put" is the
* color being overlaid.
*
* PNMColorIndexAndBlend blends an R, G, B component color with a color
* indexed into a colormap table.
*
* Both functions return an R, G, B component color.
* ----------------------------------------------------------------------------
*/
pnmcolor
PNMColorBlend(c_have, c_put)
pnmcolor *c_have, *c_put;
{
pnmcolor loccolor;
short r, g, b;
/* "127" is half the background color (which should be derived) */
r = (short)c_put->r - 127 + (short)c_have->r / 2;
g = (short)c_put->g - 127 + (short)c_have->g / 2;
b = (short)c_put->b - 127 + (short)c_have->b / 2;
loccolor.r = (r < 0) ? 0 : (unsigned char)r;
loccolor.g = (g < 0) ? 0 : (unsigned char)g;
loccolor.b = (b < 0) ? 0 : (unsigned char)b;
return loccolor;
}
pnmcolor
PNMColorIndexAndBlend(c_have, cidx)
pnmcolor *c_have;
int cidx;
{
pnmcolor loccolor, *c_put;
int ir, ig, ib;
short r, g, b;
if ((ncolors > 0) && (cidx < ncolors))
{
c_put = &PNMcolors[cidx];
r = (short)c_put->r;
g = (short)c_put->g;
b = (short)c_put->b;
}
else
{
GrGetColor(cidx, &ir, &ig, &ib);
r = (short)ir;
g = (short)ig;
b = (short)ib;
}
/* "127" is half the background color (which should be derived) */
r += (short)c_have->r / 2 - 127;
g += (short)c_have->g / 2 - 127;
b += (short)c_have->b / 2 - 127;
loccolor.r = (r < 0) ? 0 : (unsigned char)r;
loccolor.g = (g < 0) ? 0 : (unsigned char)g;
loccolor.b = (b < 0) ? 0 : (unsigned char)b;
return loccolor;
}
/*
* ----------------------------------------------------------------------------
*
* PlotPNMTechInit --
*
* Called when magic starts up.
*
*
* Results:
* None.
*
* Side effects:
* Initializes lk[...] array with the lanczos kernel.
*
* ----------------------------------------------------------------------------
*/
void
PlotPNMTechInit()
{
int i;
/* Clear out any old information */
if (PaintStyles != NULL)
freeMagic(PaintStyles);
PaintStyles = (pstyle *)mallocMagic(DBNumUserLayers * sizeof(pstyle));
for (i = 0; i < DBNumUserLayers; i++)
{
PaintStyles[i].wmask = 0;
PaintStyles[i].color.r = 0xff;
PaintStyles[i].color.g = 0xff;
PaintStyles[i].color.b = 0xff;
}
Init_Error = 0;
/* Initialize Lanczos kernel */
for (i = 0; i <= 2 * LANCZOS_KERNEL_SIZE; i++)
lk[i] = lanczos_kernel(i, LANCZOS_KERNEL_SIZE);
}
/*
* ----------------------------------------------------------------------------
*
* PlotPNMTechLine --
*
* Parse a magic technology file line for the pnm plot style
*
* Results:
* Return TRUE always (no errors flagged).
*
* Side effects:
* Modifies paintstyles[] array.
*
* ----------------------------------------------------------------------------
*/
/* ARGSUSED */
bool
PlotPNMTechLine(sectionName, argc, argv)
char *sectionName; /* Name of this section (unused). */
int argc; /* Number of arguments on line. */
char *argv[]; /* Pointers to fields of line. */
{
int i, j, k, style;
void PlotPNMSetDefaults(); /* Forward declaration */
if (!strncmp(argv[0], "color", 5))
PlotLoadColormap((argc == 1) ? NULL : argv[1]);
else if (!strncmp(argv[0], "dstyle", 6))
PlotLoadStyles((argc == 1) ? NULL : argv[1]);
else if (!strncmp(argv[0], "default", 7))
PlotPNMSetDefaults();
else if (!strncmp(argv[0], "draw", 4))
{
if (argc == 2)
{
/* Use the default drawing style(s) for this type. */
i = (int)DBTechNameType(argv[1]);
if (i >= 0 && i < DBNumUserLayers)
{
for (j = 0; j < DBWNumStyles; j++)
{
style = j + TECHBEGINSTYLES;
if (TTMaskHasType(DBWStyleToTypes(j), i))
{
PaintStyles[i].wmask |= GrStyleTable[style].mask;
PaintStyles[i].color =
PNMColorIndexAndBlend(&PaintStyles[i].color,
GrStyleTable[style].color);
}
}
}
}
else if (argc == 3)
{
pstyle savestyle;
bool newcolor = FALSE;
/* Use the specified drawing style(s) instead of the */
/* display drawing styles (used to override crosses */
/* on contacts and such). */
k = (int)DBTechNameType(argv[1]);
if (k >= 0 && k < DBNumUserLayers)
{
savestyle = PaintStyles[k];
PaintStyles[k].wmask = 0;
PaintStyles[k].color.r = 255;
PaintStyles[k].color.g = 255;
PaintStyles[k].color.b = 255;
for (j = 2; j < argc; j++)
{
/* Use the specified display style, or the internal one */
if (ndstyles > 0)
{
for (i = 0; i < ndstyles; i++)
{
if (!strcmp(Dstyles[i].name, argv[j]))
{
PaintStyles[k].wmask |= Dstyles[i].wmask;
PaintStyles[k].color =
PNMColorBlend(&PaintStyles[k].color,
&Dstyles[i].color);
newcolor = TRUE;
}
}
}
else
{
i = (int)GrGetStyleFromName(argv[j]);
if (i >= 0)
{
PaintStyles[k].wmask |= GrStyleTable[i].mask;
PaintStyles[k].color =
PNMColorIndexAndBlend(&PaintStyles[k].color,
GrStyleTable[i].color);
newcolor = TRUE;
}
else
TxError("Unknown drawing style \"%s\" for PNM plot.\n",
argv[j]);
}
/* In case of error, revert to the default style */
if (newcolor == FALSE)
PaintStyles[k] = savestyle;
}
}
else
TxError("Unknown magic layer \"%s\" for PNM plot.\n", argv[1]);
}
}
else if (!strncmp(argv[0], "map", 3))
{
k = (int)DBTechNameType(argv[1]);
if (k >= 0 && k < DBNumUserLayers)
{
for (j = 2; j < argc; j++)
{
i = (int)DBTechNameType(argv[j]);
if (i >= 0)
{
PaintStyles[k].wmask |= PaintStyles[i].wmask;
PaintStyles[k].color = PNMColorBlend(&PaintStyles[k].color,
&PaintStyles[i].color);
}
}
}
}
return TRUE;
}
/*
* ----------------------------------------------------------------------------
*
* PlotPNMSetDefaults --
*
* Generate default colors for the PNM plot style from existing
* graphics colors for the window.
*
* ----------------------------------------------------------------------------
*/
void
PlotPNMSetDefaults()
{
int i, j, style;
for (i = TT_SPACE + 1; i < DBNumUserLayers; i++)
{
for (j = 0; j < DBWNumStyles; j++)
{
style = j + TECHBEGINSTYLES;
if (TTMaskHasType(DBWStyleToTypes(j), i))
{
PaintStyles[i].wmask |= GrStyleTable[style].mask;
PaintStyles[i].color =
PNMColorIndexAndBlend(&PaintStyles[i].color,
GrStyleTable[style].color);
}
}
}
}
/*
* ----------------------------------------------------------------------------
*
* PlotPNMTechFinal --
*
* Routine to be run at the end of reading the "plot pnm" techfile
* section.
*
* Results:
* None.
*
* Side effects:
* The "Dstyles" array is no longer needed and is free'd.
* The "PNMTypeTable" is malloc'd and entries filled.
*
* ----------------------------------------------------------------------------
*/
void
PlotPNMTechFinal()
{
int i;
for (i = 0; i < ndstyles; i++)
freeMagic(Dstyles[i].name);
if (Dstyles != NULL)
{
freeMagic(Dstyles);
Dstyles = NULL;
ndstyles = 0;
}
if (PNMcolors != NULL)
{
freeMagic(PNMcolors);
PNMcolors = NULL;
ncolors = 0;
}
/* If no "draw" or "map" lines were declared in the technology */
/* file, then we put together a default style where we use the */
/* display dstyles for each layer. We detect the condition as */
/* having all wmask values 0 in the PaintStyles array. */
for (i = TT_SPACE + 1; i < DBNumUserLayers; i++)
if (PaintStyles[i].wmask != 0)
break;
if (i < DBNumUserLayers)
return;
PlotPNMSetDefaults();
}
/*
* ----------------------------------------------------------------------------
*
* PlotLoadStyles --
*
* Read in the plotting styles for rendering.
*
* Results:
* None.
*
* Side effects:
* Initializes arrays for drawing/plotting.
*
* ----------------------------------------------------------------------------
*/
void
PlotLoadStyles(filename)
char *filename;
{
FILE *inp;
char fullName[256];
char *buf;
int newsec;
int ord, mask, color, outline, nfill, stipple;
int ir, ig, ib;
char shortname;
char longname[128];
char fill[42];
if (filename == NULL)
{
(void) sprintf(fullName, "%.100s.7bit.mraster_dstyle", DBWStyleType);
buf = fullName;
}
else
{
buf = filename;
}
inp = PaOpen(buf, "r", (char *)NULL, ".", SysLibPath, (char **) NULL);
if (inp == NULL)
{
TxError ("PNM plot: Could not open display style file\n");
Init_Error = 1;
return;
}
buf = fullName; /* reuse this space for input */
ndstyles = 0;
Dstyles = (dstyle *)mallocMagic(DBWNumStyles * sizeof(dstyle));
/* Read in the dstyle file */
newsec = FALSE;
while (fgets (buf, 256, inp))
{
if (buf[0] == '#') continue;
if (StrIsWhite (buf, FALSE))
{
newsec = TRUE;
continue;
}
else if (newsec)
{
if (strncmp (buf, "display_styles", 14) != 0)
goto dstyle_err;
newsec = FALSE;
}
else
{
if (sscanf (buf, "%d %d %d %d %40s %d %c %126s",
&ord, &mask, &color, &outline, fill, &stipple,
&shortname, longname) != 8)
goto dstyle_err;
if (ndstyles == DBWNumStyles)
goto dstyle_err;
Dstyles[ndstyles].wmask = mask;
if ((ncolors > 0) && (color >=0) && (color < ncolors))
{
Dstyles[ndstyles].color = PNMcolors[color];
}
else
{
GrGetColor(color, &ir, &ig, &ib);
Dstyles[ndstyles].color.r = (unsigned char)ir;
Dstyles[ndstyles].color.g = (unsigned char)ig;
Dstyles[ndstyles].color.b = (unsigned char)ib;
}
Dstyles[ndstyles].name = StrDup(NULL, longname);
ndstyles++;
if (ndstyles == DBWNumStyles) break;
}
}
fclose (inp);
return;
dstyle_err:
Init_Error = 1;
TxError ("Format error in display style file\n");
fclose (inp);
}
/*
* ----------------------------------------------------------------------------
*
* PlotLoadColormap --
*
* Read in the colormap for rendering.
*
* Results:
* None.
*
* Side effects:
* Initializes arrays for drawing/plotting.
*
* ----------------------------------------------------------------------------
*/
void
PlotLoadColormap(filename)
char *filename;
{
FILE *inp;
char fullName[256];
char *buf;
int red, blue, green;
/* read in color map */
if (filename == NULL)
{
(void) sprintf(fullName, "%.100s.7bit.mraster.cmap", DBWStyleType);
buf = fullName;
}
else
buf = filename;
inp = PaOpen(buf, "r", (char *) NULL, ".", SysLibPath, (char **) NULL);
if (inp == NULL)
{
TxError("Couldn't open colormap file \"%s\"\n", buf);
Init_Error = 1;
return;
}
buf = fullName; /* reuse this space for input */
ncolors = 0;
PNMcolors = (pnmcolor *)mallocMagic(128 * PIXELSZ);
while (fgets (buf, 256, inp)) {
if (buf[0] == '#') continue;
if (StrIsWhite (buf, FALSE))
continue;
if (ncolors == 128) {
goto color_err;
}
if (sscanf (buf, "%d %d %d", &red, &green, &blue) != 3) {
goto color_err;
}
PNMcolors[ncolors].r = (unsigned char)red;
PNMcolors[ncolors].g = (unsigned char)green;
PNMcolors[ncolors].b = (unsigned char)blue;
ncolors++;
}
fclose(inp);
return;
color_err:
Init_Error = 1;
TxError ("Format error in colormap file\n");
fclose (inp);
}
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