ref: 786f5b18e439a292ca364e18230496dbf261f5c2
parent: f061101210352b9783085ba37e1c58f1fac89862
author: Simon Tatham <anakin@pobox.com>
date: Fri Dec 11 14:53:58 EST 2015
New utility 'patternpicture', to build a Pattern from an xbm. This utility works basically the same as galaxiespicture: you feed it a .xbm bitmap on standard input, and it constructs a game ID which solves to exactly that image. It will pre-fill some squares if that's necessary to resolve ambiguity, or leave the grid completely blank if it can.
--- a/pattern.R
+++ b/pattern.R
@@ -7,6 +7,9 @@
patternsolver : [U] pattern[STANDALONE_SOLVER] STANDALONE
patternsolver : [C] pattern[STANDALONE_SOLVER] STANDALONE
+patternpicture : [U] pattern[STANDALONE_PICTURE_GENERATOR] STANDALONE
+patternpicture : [C] pattern[STANDALONE_PICTURE_GENERATOR] STANDALONE
+
ALL += pattern[COMBINED]
!begin am gtk
--- a/pattern.c
+++ b/pattern.c
@@ -226,6 +226,7 @@
* it's useful to anyone.)
*/
+#ifndef STANDALONE_PICTURE_GENERATOR
static int float_compare(const void *av, const void *bv)
{const float *a = (const float *)av;
@@ -319,6 +320,7 @@
sfree(fgrid);
}
+#endif
static int compute_rowdata(int *ret, unsigned char *start, int len, int step)
{@@ -495,7 +497,7 @@
int i, j, ok, max;
int max_h, max_w;
- assert((state!=NULL) ^ (grid!=NULL));
+ assert((state!=NULL && state->common->rowdata!=NULL) ^ (grid!=NULL));
max = max(w, h);
@@ -515,7 +517,7 @@
*/
for (i=0; i<h; i++) {int freespace, rowlen;
- if (state) {+ if (state && state->common->rowdata) {memcpy(rowdata, state->common->rowdata + state->common->rowsize*(w+i), max*sizeof(int));
rowlen = state->common->rowlen[w+i];
} else {@@ -540,7 +542,7 @@
max_h = changed_h[i];
for (i=0; i<w; i++) {int freespace, rowlen;
- if (state) {+ if (state && state->common->rowdata) {memcpy(rowdata, state->common->rowdata + state->common->rowsize*i, max*sizeof(int));
rowlen = state->common->rowlen[i];
} else {@@ -577,7 +579,7 @@
for (; max_h && max_h >= max_w; max_h--) { for (i=0; i<h; i++) { if (changed_h[i] >= max_h) {- if (state) {+ if (state && state->common->rowdata) {memcpy(rowdata, state->common->rowdata + state->common->rowsize*(w+i), max*sizeof(int));
rowdata[state->common->rowlen[w+i]] = 0;
} else {@@ -601,7 +603,7 @@
for (; max_w && max_w >= max_h; max_w--) { for (i=0; i<w; i++) { if (changed_w[i] >= max_w) {- if (state) {+ if (state && state->common->rowdata) {memcpy(rowdata, state->common->rowdata + state->common->rowsize*i, max*sizeof(int));
rowdata[state->common->rowlen[i]] = 0;
} else {@@ -635,6 +637,7 @@
return ok;
}
+#ifndef STANDALONE_PICTURE_GENERATOR
static unsigned char *generate_soluble(random_state *rs, int w, int h)
{int i, j, ok, ntries, max;
@@ -698,7 +701,12 @@
sfree(rowdata);
return grid;
}
+#endif
+#ifdef STANDALONE_PICTURE_GENERATOR
+unsigned char *picture;
+#endif
+
static char *new_game_desc(const game_params *params, random_state *rs,
char **aux, int interactive)
{@@ -706,15 +714,63 @@
int i, j, max, rowlen, *rowdata;
char intbuf[80], *desc;
int desclen, descpos;
+#ifdef STANDALONE_PICTURE_GENERATOR
+ game_state *state;
+ int *index;
+#endif
- grid = generate_soluble(rs, params->w, params->h);
max = max(params->w, params->h);
+
+#ifdef STANDALONE_PICTURE_GENERATOR
+ /*
+ * Fixed input picture.
+ */
+ grid = snewn(params->w * params->h, unsigned char);
+ memcpy(grid, picture, params->w * params->h);
+
+ /*
+ * Now winnow the immutable square set as far as possible.
+ */
+ state = snew(game_state);
+ state->grid = grid;
+ state->common = snew(game_state_common);
+ state->common->rowdata = NULL;
+ state->common->immutable = snewn(params->w * params->h, unsigned char);
+ memset(state->common->immutable, 1, params->w * params->h);
+
+ index = snewn(params->w * params->h, int);
+ for (i = 0; i < params->w * params->h; i++)
+ index[i] = i;
+ shuffle(index, params->w * params->h, sizeof(*index), rs);
+
+ {+ unsigned char *matrix = snewn(params->w*params->h, unsigned char);
+ unsigned char *workspace = snewn(max*7, unsigned char);
+ unsigned int *changed_h = snewn(max+1, unsigned int);
+ unsigned int *changed_w = snewn(max+1, unsigned int);
+ int *rowdata = snewn(max+1, int);
+ for (i = 0; i < params->w * params->h; i++) {+ state->common->immutable[index[i]] = 0;
+ if (!solve_puzzle(state, grid, params->w, params->h,
+ matrix, workspace, changed_h, changed_w,
+ rowdata, 0))
+ state->common->immutable[index[i]] = 1;
+ }
+ sfree(workspace);
+ sfree(changed_h);
+ sfree(changed_w);
+ sfree(rowdata);
+ sfree(matrix);
+ }
+#else
+ grid = generate_soluble(rs, params->w, params->h);
+#endif
rowdata = snewn(max, int);
/*
* Save the solved game in aux.
*/
- {+ if (aux) {char *ai = snewn(params->w * params->h + 2, char);
/*
@@ -781,6 +837,40 @@
assert(descpos == desclen);
assert(desc[desclen-1] == '/');
desc[desclen-1] = '\0';
+#ifdef STANDALONE_PICTURE_GENERATOR
+ for (i = 0; i < params->w * params->h; i++)
+ if (state->common->immutable[i])
+ break;
+ if (i < params->w * params->h) {+ /*
+ * At least one immutable square, so we need a suffix.
+ */
+ int run;
+
+ desc = sresize(desc, desclen + params->w * params->h + 3, char);
+ desc[descpos-1] = ',';
+
+ run = 0;
+ for (i = 0; i < params->w * params->h; i++) {+ if (!state->common->immutable[i]) {+ run++;
+ if (run == 25) {+ desc[descpos++] = 'z';
+ run = 0;
+ }
+ } else {+ desc[descpos++] = run + (grid[i] == GRID_FULL ? 'A' : 'a');
+ run = 0;
+ }
+ }
+ if (run > 0)
+ desc[descpos++] = run + 'a';
+ desc[descpos] = '\0';
+ }
+ sfree(state->common->immutable);
+ sfree(state->common);
+ sfree(state);
+#endif
sfree(rowdata);
sfree(grid);
return desc;
@@ -2004,6 +2094,158 @@
printf("\n");}
}
+
+ return 0;
+}
+
+#endif
+
+#ifdef STANDALONE_PICTURE_GENERATOR
+
+/*
+ * Main program for the standalone picture generator. To use it,
+ * simply provide it with an XBM-format bitmap file (note XBM, not
+ * XPM) on standard input, and it will output a game ID in return.
+ * For example:
+ *
+ * $ ./patternpicture < calligraphic-A.xbm
+ * 15x15:2/4/2/2/2/3/3/3.1/3.1/3.1/11/14/12/6/1/2/2/3/4/5/1.3/2.3/1.3/2.3/1.4/9/1.1.3/2.2.3/5.4/3.2
+ *
+ * That looks easy, of course - all the program has done is to count
+ * up the clue numbers! But in fact, it's done more than that: it's
+ * also checked that the result is uniquely soluble from just the
+ * numbers. If it hadn't been, then it would have also left some
+ * filled squares in the playing area as extra clues.
+ *
+ * $ ./patternpicture < cube.xbm
+ * 15x15:10/2.1/1.1.1/1.1.1/1.1.1/1.1.1/1.1.1/1.1.1/1.1.1/1.10/1.1.1/1.1.1/1.1.1/2.1/10/10/1.2/1.1.1/1.1.1/1.1.1/10.1/1.1.1/1.1.1/1.1.1/1.1.1/1.1.1/1.1.1/1.1.1/1.2/10,TNINzzzzGNzw
+ *
+ * This enables a reasonably convenient design workflow for coming up
+ * with pictorial Pattern puzzles which _are_ uniquely soluble without
+ * those inelegant pre-filled squares. Fire up a bitmap editor (X11
+ * bitmap(1) is good enough), save a trial .xbm, and then test it by
+ * running a command along the lines of
+ *
+ * $ ./pattern $(./patternpicture < test.xbm)
+ *
+ * If the resulting window pops up with some pre-filled squares, then
+ * that tells you which parts of the image are giving rise to
+ * ambiguities, so try making tweaks in those areas, try the test
+ * command again, and see if it helps. Once you have a design for
+ * which the Pattern starting grid comes out empty, there's your game
+ * ID.
+ */
+
+#include <time.h>
+
+int main(int argc, char **argv)
+{+ game_params *par;
+ char *params, *desc;
+ random_state *rs;
+ time_t seed = time(NULL);
+ char buf[4096];
+ int i;
+ int x, y;
+
+ par = default_params();
+ if (argc > 1)
+ decode_params(par, argv[1]); /* get difficulty */
+ par->w = par->h = -1;
+
+ /*
+ * Now read an XBM file from standard input. This is simple and
+ * hacky and will do very little error detection, so don't feed
+ * it bogus data.
+ */
+ picture = NULL;
+ x = y = 0;
+ while (fgets(buf, sizeof(buf), stdin)) {+ buf[strcspn(buf, "\r\n")] = '\0';
+ if (!strncmp(buf, "#define", 7)) {+ /*
+ * Lines starting `#define' give the width and height.
+ */
+ char *num = buf + strlen(buf);
+ char *symend;
+
+ while (num > buf && isdigit((unsigned char)num[-1]))
+ num--;
+ symend = num;
+ while (symend > buf && isspace((unsigned char)symend[-1]))
+ symend--;
+
+ if (symend-5 >= buf && !strncmp(symend-5, "width", 5))
+ par->w = atoi(num);
+ else if (symend-6 >= buf && !strncmp(symend-6, "height", 6))
+ par->h = atoi(num);
+ } else {+ /*
+ * Otherwise, break the string up into words and take
+ * any word of the form `0x' plus hex digits to be a
+ * byte.
+ */
+ char *p, *wordstart;
+
+ if (!picture) {+ if (par->w < 0 || par->h < 0) {+ printf("failed to read width and height\n");+ return 1;
+ }
+ picture = snewn(par->w * par->h, unsigned char);
+ for (i = 0; i < par->w * par->h; i++)
+ picture[i] = GRID_UNKNOWN;
+ }
+
+ p = buf;
+ while (*p) {+ while (*p && (*p == ',' || isspace((unsigned char)*p)))
+ p++;
+ wordstart = p;
+ while (*p && !(*p == ',' || *p == '}' ||
+ isspace((unsigned char)*p)))
+ p++;
+ if (*p)
+ *p++ = '\0';
+
+ if (wordstart[0] == '0' &&
+ (wordstart[1] == 'x' || wordstart[1] == 'X') &&
+ !wordstart[2 + strspn(wordstart+2,
+ "0123456789abcdefABCDEF")]) {+ unsigned long byte = strtoul(wordstart+2, NULL, 16);
+ for (i = 0; i < 8; i++) {+ int bit = (byte >> i) & 1;
+ if (y < par->h && x < par->w)
+ picture[y * par->w + x] =
+ bit ? GRID_FULL : GRID_EMPTY;
+ x++;
+ }
+
+ if (x >= par->w) {+ x = 0;
+ y++;
+ }
+ }
+ }
+ }
+ }
+
+ for (i = 0; i < par->w * par->h; i++)
+ if (picture[i] == GRID_UNKNOWN) {+ fprintf(stderr, "failed to read enough bitmap data\n");
+ return 1;
+ }
+
+ rs = random_new((void*)&seed, sizeof(time_t));
+
+ desc = new_game_desc(par, rs, NULL, FALSE);
+ params = encode_params(par, FALSE);
+ printf("%s:%s\n", params, desc);+
+ sfree(desc);
+ sfree(params);
+ free_params(par);
+ random_free(rs);
return 0;
}