- FILE *fp;
- png_structp png_ptr;
- png_infop info_ptr;
- double max_out_level = (1 << bitdepth) - 1;
- int nx = m_nx;
- int ny = m_ny;
- ImageFileArray v = getArray();
-
- unsigned char* rowp = new unsigned char [nx * nxcell * (bitdepth / 8)];
-
- if ((fp = fopen (outfile, "wb")) == NULL)
- return;
-
- png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
- if (! png_ptr)
- return;
-
- info_ptr = png_create_info_struct(png_ptr);
- if (! info_ptr) {
- png_destroy_write_struct(&png_ptr, (png_infopp) NULL);
- fclose(fp);
- return;
- }
-
- if (setjmp(png_ptr->jmpbuf)) {
- png_destroy_write_struct(&png_ptr, &info_ptr);
- fclose(fp);
- return;
- }
-
- png_init_io(png_ptr, fp);
-
- png_set_IHDR(png_ptr, info_ptr, nx * nxcell, ny * nycell, bitdepth, PNG_COLOR_TYPE_GRAY, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_DEFAULT);
-
- png_write_info(png_ptr, info_ptr);
- for (int irow = ny - 1; irow >= 0; irow--) {
- png_bytep row_pointer = rowp;
-
- for (int icol = 0; icol < nx; icol++) {
- int pos = icol * nxcell;
- double dens = (v[icol][irow] - densmin) / (densmax - densmin);
- dens = clamp (dens, 0., 1.);
- unsigned int outval = static_cast<unsigned int> (dens * max_out_level);
-
- for (int p = pos; p < pos + nxcell; p++) {
- if (bitdepth == 8)
- rowp[p] = outval;
- else {
- int rowpos = p * 2;
- rowp[rowpos] = (outval >> 8) & 0xFF;
- rowp[rowpos+1] = (outval & 0xFF);
+ FILE *fp;
+ png_structp png_ptr;
+ png_infop info_ptr;
+ double max_out_level = (1 << bitdepth) - 1;
+ int nx = m_nx;
+ int ny = m_ny;
+ ImageFileArray v = getArray();
+
+ unsigned char* rowp = new unsigned char [nx * nxcell * (bitdepth / 8)];
+
+ if ((fp = fopen (outfile, "wb")) == NULL)
+ return;
+
+ png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+ if (! png_ptr)
+ return;
+
+ info_ptr = png_create_info_struct(png_ptr);
+ if (! info_ptr) {
+ png_destroy_write_struct(&png_ptr, (png_infopp) NULL);
+ fclose(fp);
+ return;