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xrw2pngmos.c
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xrw2pngmos.c
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/* xrw2pngmos.c
*
* Copyright 2012 David G. Barnes
*
* This file is part of S2VOLSURF.
*
* S2VOLSURF is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation, either version 3 of the License,
* or (at your option) any later version.
*
* S2VOLSURF is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with S2VOLSURF. If not, see <http://www.gnu.org/licenses/>.
*
* We would appreciate it if research outcomes using S2VOLSURF would
* provide the following acknowledgement:
*
* "Three-dimensional visualisation was conducted with the S2PLOT
* progamming library"
*
* and a reference to
*
* D.G.Barnes, C.J.Fluke, P.D.Bourke & O.T.Parry, 2006, Publications
* of the Astronomical Society of Australia, 23(2), 82-93.
*
* $Id: xrw2pngmos.c 224 2014-04-23 22:54:03Z barnesd $
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <math.h>
#include <time.h>
#include <ctype.h>
#include <png.h>
#include "libxrw.c"
void usage(char *exename) {
fprintf(stderr, "usage: %s [options] -f xrwfilename -o pngfilename\n", exename);
fprintf(stderr, "-s s1 s2 s3\t\t set data averaging along each axis (1 1 1)\n");
fprintf(stderr, "-R n\t\t use n rows in output image\n");
}
#if (0)
// png functions and associated structs learned from
// Ben Bullock's code @ http://www.lemoda.net/c/write-png/, which itself
// was derived from "Sam"'s code @
// http://stackoverflow.com/questions/1821806/how-to-encode-png-to-buffer-using-libpng
typedef struct {
uint8_t r,g,b;
} pixel_t;
typedef struct {
pixel_t *pix;
size_t w, h;
} bitmap_t;
static int savePNG (FILE *fp, bitmap_t *bitmap);
#endif
int main(int argc, char *argv[]) {
#define FNAMELEN 400
char ifname[FNAMELEN+1];
int haveifname = 0;
char ofname[FNAMELEN+1];
int haveofname = 0;
int use_rows = 0;
int stride[3] = {1,1,1}; //{3,3,1};
if (argc < 5) {
usage(argv[0]);
return -1;
}
int ic = 1;
while (ic < argc) {
if (!strcmp(argv[ic], "-f")) {
strncpy(ifname, argv[++ic], FNAMELEN);
haveifname = 1;
} else if (!strcmp(argv[ic], "-o")) {
strncpy(ofname, argv[++ic], FNAMELEN);
haveofname = 1;
} else if (!strcmp(argv[ic], "-s")) {
stride[0] = atoi(argv[++ic]);
stride[1] = atoi(argv[++ic]);
stride[2] = atoi(argv[++ic]);
if (stride[0] < 1 || stride[1] < 1 || stride[2] < 1) {
fprintf(stderr, "stride must be at least 1 in each direction!\n");
exit(-1);
}
} else if (!strcmp(argv[ic], "-R")) {
use_rows = atoi(argv[++ic]);
}
ic++;
}
if (!haveifname || !haveofname) {
usage(argv[0]);
return -1;
}
XRAW_STRUCT *xr = loadXraw(ifname);
if (!xr) {
fprintf(stderr, "Failed to open or read '%s'.\n", argv[1]);
return -1;
}
showXraw(xr);
fprintf(stdout, "- - - - - - - - - - - - - - - - - - - - - - - - -\n");
VOL_STRUCT *vol = Xraw2Xvol(xr, stride);
if (!vol) {
fprintf(stderr, "Failed to parse data volume.\n");
return -1;
}
showXvol(vol);
int nx, ny, nz;
nx = vol->nx;
ny = vol->ny;
nz = vol->nz;
bitmap_t bits;
if (use_rows == 1) {
bits.w = nx * nz;
bits.h = ny;
bits.pix = (pixel_t *)malloc(nx*ny*nz*sizeof(pixel_t));
int i, j, k;
float val;
uint8_t grey;
for (i = 0; i < nx; i++) {
for (j = 0; j < ny; j++) {
for (k = 0; k < nz; k++) {
val = vol->data[i][j][k];
grey = val * 255.0;
bits.pix[(nx*nz)*j + (k*nx+i)].r = grey;
bits.pix[(nx*nz)*j + (k*nx+i)].g = grey;
bits.pix[(nx*nz)*j + (k*nx+i)].b = grey;
}
}
}
} else {
int Nzx, Nzy;
if (use_rows > 1) {
Nzy = use_rows;
Nzx = nz/Nzy;
if (nz % Nzy) {
Nzx++;
}
} else {
Nzx = (int)(floorf(sqrtf((float)nz)));
if (Nzx * Nzx == nz) {
Nzy = Nzx;
} else {
Nzx++;
Nzy = (nz / Nzx) + 1;
}
}
fprintf(stderr, "mosaic dimensions are: %d %d\n", Nzx, Nzy);
bits.w = nx * Nzx;
bits.h = ny * Nzy;
bits.pix = (pixel_t *)malloc(nx * ny * Nzx * Nzy * sizeof(pixel_t));
int i, j, k;
int izx, izy;
float val;
uint8_t grey;
for (i = 0; i < nx; i++) {
for (j = 0; j < ny; j++) {
for (k = 0; k < nz; k++) {
val = vol->data[i][j][k];
grey = val * 255.0;
izy = k / Nzx;
izx = k % Nzx;
bits.pix[(nx*Nzx)*(izy*ny+j) + (izx*nx+i)].r = grey;
bits.pix[(nx*Nzx)*(izy*ny+j) + (izx*nx+i)].g = grey;
bits.pix[(nx*Nzx)*(izy*ny+j) + (izx*nx+i)].b = grey;
}
}
}
}
FILE *fout = fopen(ofname, "w");
if (fout) {
savePNG(fout, &bits);
fclose(fout);
} else {
fprintf(stderr, "Failed to open '%s' for writing.\n", ofname);
return -1;
}
return 0;
}
#if (0)
static int savePNG (FILE *fp, bitmap_t *bitmap) {
png_structp png_ptr = NULL;
png_infop info_ptr = NULL;
int i, j;
png_byte **row_pointers = NULL;
int status = -1;
png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr) {
return status;
}
info_ptr = png_create_info_struct (png_ptr);
if (!info_ptr) {
return status;
}
/* Set image attributes. */
png_set_IHDR(png_ptr, info_ptr, bitmap->w, bitmap->h, 8,
PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
/* Initialize rows of PNG. */
row_pointers = png_malloc (png_ptr, bitmap->h * sizeof (png_byte *));
for (j = 0; j < bitmap->h; ++j) {
png_byte *row = png_malloc (png_ptr, 3 * sizeof (uint8_t) * bitmap->w);
row_pointers[j] = row;
for (i = 0; i < bitmap->w; ++i) {
pixel_t *pixel = bitmap->pix + bitmap->w * j + i;
*row++ = pixel->r;
*row++ = pixel->g;
*row++ = pixel->b;
}
}
/* Write the image data to "fp". */
png_init_io (png_ptr, fp);
png_set_rows (png_ptr, info_ptr, row_pointers);
png_write_png (png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
status = 0;
for (j = 0; j < bitmap->h; j++) {
png_free (png_ptr, row_pointers[j]);
}
png_free (png_ptr, row_pointers);
return status;
}
#endif