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#include <string>
#include <math.h>
#include <stdio.h>
#include "gr.hh"
#include "extern.hh"
extern bool _grWritePS;
extern FILE *_grPS;
/*
* gr_drawBWmaskedimage() -- draw a image of an unsigned char matrix
*
* DESCRIPTION: Draws an image using 'im', a matrix of rows*cols unsigned char
* elements. You should assign elements to im as:
*
* for(i=0;i<cols;i++) for(j=0;j<cols;j++) (im + i * jmax + j) = value_at_i_j;
*
* where i=j=0 is the lower-left corner, and i=1,j=0 is just to the right of it.
*
* GRAYSCALE: Normally, white paper is left for points with im==255, and black
* ink is used for im==0. To get this mapping, do this: #include <stdio.h>
* gr_drawBWimage(im,NULL,...); If you would like to supply an alternate
* mapping of values of im to grayscale, you can store it in imTransform.
* Then gr_drawBWimage() uses not 'im', but rather imTransform[im]. Here's an
* example which reverses the mapping, so that im==0 becomes white and
* im==255 becomes black:
*
* unsigned char imTransform[256]; for (i = 0; i < 256; i++) imTransform[i] =
* 255 - i; gr_drawBWmaskedimage_pt(...);
*
*
* NOTE: To use the default mapping, imTransform must be supplied as NULL; to
* arrange an alternate mapping, it must be an unsigned character vector of
* length 256 (anything else will produce a spurious map).
*
* GEOMETRY: The image is drawn in the rectangle defined by (xl,yb) as
* lower-left and (xr,yt) as upper-right, in user units.
*
* MISSING VALUES: if the mask image is equal to 2, the supplied "missing" value
* is used.
*
*/
void
gr_drawBWmaskedimage_pt(unsigned char missing,
unsigned char *mask,
unsigned char *im,
unsigned char *imTransform,
int imax, int jmax,
double xlpt, double ybpt, double xrpt, double ytpt)
{
register int i, j;
extern FILE *_grPS;
int perline = 0;
int perlineMAX = 39;
if (imax < perlineMAX)
perlineMAX = imax;
/* write postscript */
if (_grWritePS) {
fprintf(_grPS, "%f %f %f %f %d %d im\n",
xlpt, ybpt, xrpt, ytpt, jmax, imax);
check_psfile();
if (imTransform == NULL) {
for (j = jmax - 1; j > -1; j--) {
for (i = 0; i < imax; i++) {
if (mask != NULL && *(mask + i * jmax + j) == 2)
fprintf(_grPS, "%02X", missing);
else
fprintf(_grPS, "%02X", *(im + i * jmax + j));
if ((++perline) == perlineMAX) {
fprintf(_grPS, "\n");
perline = 0;
}
}
}
check_psfile();
} else {
/* scale contained in imTransform[] */
for (j = jmax - 1; j > -1; j--) {
for (i = 0; i < imax; i++) {
if (mask != NULL && *(mask + i * jmax + j) == 2)
fprintf(_grPS, "%02X", missing);
else
fprintf(_grPS, "%02X", imTransform[*(im + i * jmax + j)]);
if ((++perline) == perlineMAX) {
fprintf(_grPS, "\n");
perline = 0;
}
}
}
}
if (perline != 0)
fprintf(_grPS, "\n");
check_psfile();
}
}
/*
* Draw image, possibly color, in rectangle given in cm coords.
*/
void
gr_drawimage(unsigned char *im,
unsigned char *imTransform,
gr_color_model color_model,
unsigned char *mask,
double mask_r,
double mask_g,
double mask_b,
int imax,
int jmax,
double xl, // in cm
double yb, // in cm
double xr, // in cm
double yt, // in cm
bool insert_placer)
{
unsigned char cmask_r, cmask_g, cmask_b;
bool have_mask;
unsigned char value, mask_value = 0; // assign to calm compiler
register int i, j;
int perline = 0;
int perlineMAX;
if (!_grWritePS)
return;
/* Figure out about mask */
have_mask = (mask == NULL) ? false : true;
rectangle box(xl, yb, xr, yt);
bounding_box_update(box);
// Convert cm to pt
xl *= PT_PER_CM;
xr *= PT_PER_CM;
yb *= PT_PER_CM;
yt *= PT_PER_CM;
// Make image overhang the region. This change, vsn 2.005, *finally*
// solves a confusion I've had for a long time about how to do
// images.
if (imax > 1) {
double dx = (xr - xl) / (imax - 1); // pixel width
xl -= dx / 2.0;
xr += dx / 2.0;
}
if (jmax > 1) {
double dy = (yt - yb) / (jmax - 1); // pixel height
yb -= dy / 2.0;
yt += dy / 2.0;
}
rectangle r(xl / PT_PER_CM,
yb / PT_PER_CM,
xr / PT_PER_CM,
yt / PT_PER_CM);
bounding_box_update(r);
/*
* Handle BW and color differently, since PostScript handles differently.
*/
switch (color_model) {
default: /* ? taken as BW */
case bw_model:
perlineMAX = 39; /* use only 78 columns so more readible */
if (imax < perlineMAX)
perlineMAX = imax;
check_psfile();
/*
* Write map to PostScript, creating a linear one if none exists
*/
fprintf(_grPS, "%% Push map onto stack, then image stuff.\n");
fprintf(_grPS, "[\n");
if (imTransform == NULL) {
for (i = 0; i < 256; i++) {
fprintf(_grPS, "%.4f ", i / 255.0);
if (!((i + 1) % 10))
fprintf(_grPS, "\n");
}
} else {
for (i = 0; i < 256; i++) {
fprintf(_grPS, "%.4f ", imTransform[i] / 255.0);
if (!((i + 1) % 10))
fprintf(_grPS, "\n");
}
}
fprintf(_grPS, "\n]\n");
if (insert_placer)
fprintf(_grPS, "%%BEGIN_IMAGE\n"); /* for grepping in ps file */
/*
* Now write image.
*/
fprintf(_grPS, "%f %f %f %f %d %d im\n",
xl, yb, xr, yt, jmax, imax);
if (have_mask == true) {
int diff, min_diff = 256;
unsigned char index = 0; // assign to calm compiler ????
mask_value = (unsigned char)(255.0 * mask_r);
/*
* If there is a mapping, must (arduously) look up which image
* value corresponds to this color.
*/
if (imTransform != NULL) {
for (i = 0; i < 256; i++) {
diff = (int) fabs(imTransform[i] - mask_value);
if (diff < min_diff) {
min_diff = diff;
index = i;
}
}
mask_value = index;
}
}
for (j = jmax - 1; j > -1; j--) {
for (i = 0; i < imax; i++) {
value = *(im + i * jmax + j);
if (have_mask == true && *(mask + i * jmax + j) == 2) {
fprintf(_grPS, "%02X", mask_value);
} else {
fprintf(_grPS, "%02X", value);
}
if ((++perline) == perlineMAX) {
fprintf(_grPS, "\n");
perline = 0;
}
}
}
check_psfile();
if (perline != 0)
fprintf(_grPS, "\n");
check_psfile();
if (insert_placer)
fprintf(_grPS, "%%END_IMAGE\n"); /* for grepping in ps file */
break;
case rgb_model:
perlineMAX = 13; /* use only 78 columns so more readible */
if (imax < perlineMAX)
perlineMAX = imax;
if (insert_placer)
fprintf(_grPS, "%%BEGIN_IMAGE\n");
fprintf(_grPS, "%f %f %f %f %d %d cim\n",
xl, yb, xr, yt, jmax, imax);
check_psfile();
#if 0
if (have_mask == true) {
warning("BUG in grimage.c - masking of color images not working yet");
}
#endif
cmask_r = (unsigned char)pin0_255(mask_r * 255.0);
cmask_g = (unsigned char)pin0_255(mask_g * 255.0);
cmask_b = (unsigned char)pin0_255(mask_b * 255.0);
if (imTransform == NULL) {
for (j = jmax - 1; j > -1; j--) {
for (i = 0; i < imax; i++) {
value = *(im + i * jmax + j);
if (have_mask == true && *(mask + i * jmax + j) == 2) {
fprintf(_grPS, "%02X%02X%02X", cmask_r, cmask_g, cmask_b);
} else {
fprintf(_grPS, "%02X%02X%02X", value, value, value);
}
if ((++perline) == perlineMAX) {
fprintf(_grPS, "\n");
perline = 0;
}
}
}
check_psfile();
} else {
for (j = jmax - 1; j > -1; j--) {
for (i = 0; i < imax; i++) {
value = *(im + i * jmax + j);
if (have_mask == true && *(mask + i * jmax + j) == 2) {
fprintf(_grPS, "%02X%02X%02X", cmask_r, cmask_g, cmask_b);
} else {
fprintf(_grPS, "%02X%02X%02X", imTransform[value], imTransform[value + 256], imTransform[value + 512]);
}
if ((++perline) == perlineMAX) {
fprintf(_grPS, "\n");
perline = 0;
}
}
}
}
if (perline != 0)
fprintf(_grPS, "\n");
if (insert_placer)
fprintf(_grPS, "%%END_IMAGE\n"); /* for grepping in ps file */
check_psfile();
} /* switch(color_model) */
}
/*
* gr_drawBWimage_pt() -- draw a image of an unsigned char matrix
*
* SYNOPSIS void gr_drawBWimage_pt(unsigned char *im, unsigned char
* imTransform, imax, jmax, xl, yb, xr, yt);
*
* DESCRIPTION: As gr_drawBWimagept() except that xl, yb, xr and yt are
* measured in points.
*
*/
void
gr_drawBWimage_pt(unsigned char *im,
unsigned char *imTransform,
int imax, int jmax,
double xlpt, double ybpt, double xrpt, double ytpt)
{
register int i, j;
int perline = 0;
int perlineMAX = 39;
if (imax < perlineMAX)
perlineMAX = imax;
/* write postscript */
if (_grWritePS) {
fprintf(_grPS, "%f %f %f %f %d %d im\n",
xlpt, ybpt, xrpt, ytpt, jmax, imax);
check_psfile();
if (imTransform == NULL) {
for (j = jmax - 1; j > -1; j--) {
for (i = 0; i < imax; i++) {
fprintf(_grPS, "%02X", *(im + i * jmax + j));
if ((++perline) == perlineMAX) {
fprintf(_grPS, "\n");
perline = 0;
}
}
}
check_psfile();
} else {
/* scale contained in imTransform[] */
for (j = jmax - 1; j > -1; j--) {
for (i = 0; i < imax; i++) {
fprintf(_grPS, "%02X", imTransform[*(im + i * jmax + j)]);
if ((++perline) == perlineMAX) {
fprintf(_grPS, "\n");
perline = 0;
}
}
}
}
if (perline != 0)
fprintf(_grPS, "\n");
check_psfile();
}
}
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