--- /dev/null
+#include <stdio.h>
+
+#define STB_HBWANG_MAX_X 500
+#define STB_HBWANG_MAX_Y 500
+
+#define STB_HERRINGBONE_WANG_TILE_IMPLEMENTATION
+#include "stb_herringbone_wang_tile.h"
+
+#define STB_IMAGE_IMPLEMENTATION
+#include "stb_image.h"
+
+#define STB_IMAGE_WRITE_IMPLEMENTATION
+#include "stb_image_write.h"
+
+int main(int argc, char **argv)
+{
+ if (argc < 5) {
+ fprintf(stderr, "Usage: herringbone_map {inputfile} {output-width} {output-height} {outputfile}\n");
+ return 1;
+ } else {
+ char *filename = argv[1];
+ int out_w = atoi(argv[2]);
+ int out_h = atoi(argv[3]);
+ char *outfile = argv[4];
+
+ unsigned char *pixels, *out_pixels;
+ stbhw_tileset ts;
+ int w,h;
+
+ pixels = stbi_load(filename, &w, &h, 0, 3);
+ if (pixels == 0) {
+ fprintf(stderr, "Couldn't open input file '%s'\n", filename);
+ exit(1);
+ }
+
+ if (!stbhw_build_tileset_from_image(&ts, pixels, w*3, w, h)) {
+ fprintf(stderr, "Error: %s\n", stbhw_get_last_error());
+ return 1;
+ }
+
+ free(pixels);
+
+ #ifdef DEBUG_OUTPUT
+ {
+ int i,j,k;
+ // add blue borders to top-left edges of the tiles
+ int hstride = (ts.short_side_len*2)*3;
+ int vstride = (ts.short_side_len )*3;
+ for (i=0; i < ts.num_h_tiles; ++i) {
+ unsigned char *pix = ts.h_tiles[i]->pixels;
+ for (j=0; j < ts.short_side_len*2; ++j)
+ for (k=0; k < 3; ++k)
+ pix[j*3+k] = (pix[j*3+k]*0.5+100+k*75)/1.5;
+ for (j=1; j < ts.short_side_len; ++j)
+ for (k=0; k < 3; ++k)
+ pix[j*hstride+k] = (pix[j*hstride+k]*0.5+100+k*75)/1.5;
+ }
+ for (i=0; i < ts.num_v_tiles; ++i) {
+ unsigned char *pix = ts.v_tiles[i]->pixels;
+ for (j=0; j < ts.short_side_len; ++j)
+ for (k=0; k < 3; ++k)
+ pix[j*3+k] = (pix[j*3+k]*0.5+100+k*75)/1.5;
+ for (j=1; j < ts.short_side_len*2; ++j)
+ for (k=0; k < 3; ++k)
+ pix[j*vstride+k] = (pix[j*vstride+k]*0.5+100+k*75)/1.5;
+ }
+ }
+ #endif
+
+ out_pixels = malloc(out_w * out_h * 3);
+
+ if (!stbhw_generate_image(&ts, NULL, out_pixels, out_w*3, out_w, out_h)) {
+ fprintf(stderr, "Error: %s\n", stbhw_get_last_error());
+ return 1;
+ }
+
+ stbi_write_png(argv[4], out_w, out_h, 3, out_pixels, out_w*3);
+ free(out_pixels);
+
+ stbhw_free_tileset(&ts);
+ return 0;
+ }
+}
\ No newline at end of file