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puzzles/mosaic.c
Ben Harris a9af3fda1d Rename UI_UPDATE as MOVE_UI_UPDATE 
All the other constants named UI_* are special key names that can be
passed to midend_process_key(), but UI_UPDATE is a special return value
from the back-end interpret_move() function instead.  This renaming
makes the distinction clear and provides a naming convention for future
special return values from interpret_move().
2023-06-11 00:33:27 +01:00

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/*
* mosaic.c: A puzzle based on a square grid, with some of the tiles
* having clues as to how many black squares are around them.
* the purpose of the game is to find what should be on all tiles (black or
* unmarked)
*
* The game is also known as: ArtMosaico, Count and Darken, Cuenta Y Sombrea,
* Fill-a-Pix, Fill-In, Komsu Karala, Magipic, Majipiku, Mosaico, Mosaik,
* Mozaiek, Nampre Puzzle, Nurie-Puzzle, Oekaki-Pix, Voisimage.
*
* Implementation is loosely based on https://github.com/mordechaim/Mosaic, UI
* interaction is based on the range puzzle in the collection.
*/
#include <assert.h>
#include <ctype.h>
#ifdef NO_TGMATH_H
# include <math.h>
#else
# include <tgmath.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "puzzles.h"
#define DEFAULT_SIZE 10
#define DEFAULT_AGGRESSIVENESS true
#define MAX_TILES 10000
#define MAX_TILES_ERROR "Maximum size is 10000 tiles"
#define DEFAULT_TILE_SIZE 32
#define DEBUG_IMAGE 1
#undef DEBUG_IMAGE
#define FLASH_TIME 0.5F
/* To enable debug prints define DEBUG_PRINTS */
/* Getting the coordinates and returning NULL when out of scope
* The parentheses are needed to avoid order of operations issues
*/
#define get_coords(params, array, x, y) \
(((x) >= 0 && (y) >= 0) && ((x) < params->width && (y) < params->height)) \
? array + ((y)*params->width) + x \
: NULL
#define COORD_FROM_CELL(d) ((d * ds->tilesize) + ds->tilesize / 2) - 1
enum {
COL_BACKGROUND = 0,
COL_UNMARKED,
COL_GRID,
COL_MARKED,
COL_BLANK,
COL_TEXT_SOLVED,
COL_ERROR,
COL_CURSOR,
NCOLOURS,
COL_TEXT_DARK = COL_MARKED,
COL_TEXT_LIGHT = COL_BLANK
};
enum cell_state {
STATE_UNMARKED = 0,
STATE_MARKED = 1,
STATE_BLANK = 2,
STATE_SOLVED = 4,
STATE_ERROR = 8,
STATE_UNMARKED_ERROR = STATE_ERROR | STATE_UNMARKED,
STATE_MARKED_ERROR = STATE_ERROR | STATE_MARKED,
STATE_BLANK_ERROR = STATE_ERROR | STATE_BLANK,
STATE_BLANK_SOLVED = STATE_SOLVED | STATE_BLANK,
STATE_MARKED_SOLVED = STATE_MARKED | STATE_SOLVED,
STATE_OK_NUM = STATE_BLANK | STATE_MARKED
};
struct game_params {
int width;
int height;
bool aggressive;
};
typedef struct board_state board_state;
typedef struct needed_list_item needed_list_item;
struct needed_list_item {
int x, y;
needed_list_item *next;
};
struct game_state {
bool cheating;
int not_completed_clues;
int width;
int height;
char *cells_contents;
board_state *board;
};
struct board_state {
unsigned int references;
struct board_cell *actual_board;
};
struct board_cell {
signed char clue;
bool shown;
};
struct solution_cell {
signed char cell;
bool solved;
bool needed;
};
struct desc_cell {
char clue;
bool shown;
bool value;
bool full;
bool empty;
};
struct game_ui {
bool solved;
bool in_progress;
int last_x, last_y, last_state;
int cur_x, cur_y;
int prev_cur_x, prev_cur_y;
bool cur_visible;
};
struct game_drawstate {
int tilesize;
int *state;
int cur_x, cur_y; /* -1, -1 for no cursor displayed. */
int prev_cur_x, prev_cur_y;
};
static game_params *default_params(void)
{
game_params *ret = snew(game_params);
ret->width = DEFAULT_SIZE;
ret->height = DEFAULT_SIZE;
ret->aggressive = DEFAULT_AGGRESSIVENESS;
return ret;
}
static bool game_fetch_preset(int i, char **name, game_params **params)
{
const int sizes[6] = { 3, 5, 10, 15, 25, 50 };
const bool aggressiveness[6] = { true, true, true, true, true, false };
if (i < 0 || i > 5) {
return false;
}
game_params *res = snew(game_params);
res->height = sizes[i];
res->width = sizes[i];
res->aggressive = aggressiveness[i];
*params = res;
char value[80];
sprintf(value, "Size: %dx%d", sizes[i], sizes[i]);
*name = dupstr(value);
return true;
}
static void free_params(game_params *params)
{
sfree(params);
}
static game_params *dup_params(const game_params *params)
{
game_params *ret = snew(game_params);
*ret = *params; /* structure copy */
return ret;
}
static void decode_params(game_params *params, char const *string)
{
params->width = params->height = atoi(string);
while (*string && isdigit((unsigned char)*string)) string++;
if (*string == 'x') {
string++;
params->height = atoi(string);
while (*string && isdigit((unsigned char)*string)) string++;
}
if (*string == 'h') {
string++;
params->aggressive = atoi(string);
while (*string && isdigit((unsigned char)*string)) string++;
}
}
static char *encode_params(const game_params *params, bool full)
{
char encoded[128];
int pos = 0;
pos += sprintf(encoded + pos, "%dx%d", params->width, params->height);
if (full) {
if (params->aggressive != DEFAULT_AGGRESSIVENESS)
pos += sprintf(encoded + pos, "h%d", params->aggressive);
}
return dupstr(encoded);
}
static config_item *game_configure(const game_params *params)
{
config_item *config = snewn(4, config_item);
char value[80];
config[0].type = C_STRING;
config[0].name = "Height";
sprintf(value, "%d", params->height);
config[0].u.string.sval = dupstr(value);
config[1].type = C_STRING;
config[1].name = "Width";
sprintf(value, "%d", params->width);
config[1].u.string.sval = dupstr(value);
config[2].name = "Aggressive generation (longer)";
config[2].type = C_BOOLEAN;
config[2].u.boolean.bval = params->aggressive;
config[3].type = C_END;
return config;
}
static game_params *custom_params(const config_item *cfg)
{
game_params *res = snew(game_params);
res->height = atol(cfg[0].u.string.sval);
res->width = atol(cfg[1].u.string.sval);
res->aggressive = cfg[2].u.boolean.bval;
return res;
}
static const char *validate_params(const game_params *params, bool full)
{
if (params->height < 3 || params->width < 3) {
return "Minimal size is 3x3";
}
if (params->height > MAX_TILES / params->width) {
return MAX_TILES_ERROR;
}
return NULL;
}
static bool get_pixel(const game_params *params, const bool *image,
const int x, const int y)
{
const bool *pixel;
pixel = get_coords(params, image, x, y);
if (pixel) {
return *pixel;
}
return 0;
}
static void populate_cell(const game_params *params, const bool *image,
const int x, const int y, bool edge,
struct desc_cell *desc)
{
int clue = 0;
bool xEdge = false;
bool yEdge = false;
if (edge) {
if (x > 0) {
clue += get_pixel(params, image, x - 1, y);
if (y > 0) {
clue += get_pixel(params, image, x - 1, y - 1);
}
if (y < params->height - 1) {
clue += get_pixel(params, image, x - 1, y + 1);
}
} else {
xEdge = true;
}
if (y > 0) {
clue += get_pixel(params, image, x, y - 1);
} else {
yEdge = true;
}
if (x < params->width - 1) {
clue += get_pixel(params, image, x + 1, y);
if (y > 0) {
clue += get_pixel(params, image, x + 1, y - 1);
}
if (y < params->height - 1) {
clue += get_pixel(params, image, x + 1, y + 1);
}
} else {
xEdge = true;
}
if (y < params->height - 1) {
clue += get_pixel(params, image, x, y + 1);
} else {
yEdge = true;
}
} else {
clue += get_pixel(params, image, x - 1, y - 1);
clue += get_pixel(params, image, x - 1, y);
clue += get_pixel(params, image, x - 1, y + 1);
clue += get_pixel(params, image, x, y - 1);
clue += get_pixel(params, image, x, y + 1);
clue += get_pixel(params, image, x + 1, y - 1);
clue += get_pixel(params, image, x + 1, y);
clue += get_pixel(params, image, x + 1, y + 1);
}
desc->value = get_pixel(params, image, x, y);
clue += desc->value;
if (clue == 0) {
desc->empty = true;
desc->full = false;
} else {
desc->empty = false;
/* setting the default */
desc->full = false;
if (clue == 9) {
desc->full = true;
} else if (edge && ((xEdge && yEdge && clue == 4) ||
((xEdge || yEdge) && clue == 6))) {
desc->full = true;
}
}
desc->shown = true;
desc->clue = clue;
}
static void count_around(const game_params *params,
struct solution_cell *sol, int x, int y,
int *marked, int *blank, int *total)
{
int i, j;
struct solution_cell *curr = NULL;
(*total) = 0;
(*blank) = 0;
(*marked) = 0;
for (i = -1; i < 2; i++) {
for (j = -1; j < 2; j++) {
curr = get_coords(params, sol, x + i, y + j);
if (curr) {
(*total)++;
if ((curr->cell & STATE_BLANK) != 0) {
(*blank)++;
} else if ((curr->cell & STATE_MARKED) != 0) {
(*marked)++;
}
}
}
}
}
static void count_around_state(const game_state *state, int x, int y,
int *marked, int *blank, int *total)
{
int i, j;
char *curr = NULL;
(*total) = 0;
(*blank) = 0;
(*marked) = 0;
for (i = -1; i < 2; i++) {
for (j = -1; j < 2; j++) {
curr = get_coords(state, state->cells_contents, x + i, y + j);
if (curr) {
(*total)++;
if ((*curr & STATE_BLANK) != 0) {
(*blank)++;
} else if ((*curr & STATE_MARKED) != 0) {
(*marked)++;
}
}
}
}
}
static void count_clues_around(const game_params *params,
struct desc_cell *desc, int x, int y,
int *clues, int *total)
{
int i, j;
struct desc_cell *curr = NULL;
(*total) = 0;
(*clues) = 0;
for (i = -1; i < 2; i++) {
for (j = -1; j < 2; j++) {
curr = get_coords(params, desc, x + i, y + j);
if (curr) {
(*total)++;
if (curr->shown) {
(*clues)++;
}
}
}
}
}
static void mark_around(const game_params *params,
struct solution_cell *sol, int x, int y, int mark)
{
int i, j, marked = 0;
struct solution_cell *curr;
for (i = -1; i < 2; i++) {
for (j = -1; j < 2; j++) {
curr = get_coords(params, sol, x + i, y + j);
if (curr) {
if (curr->cell == STATE_UNMARKED) {
curr->cell = mark;
marked++;
}
}
}
}
}
static char solve_cell(const game_params *params, struct desc_cell *desc,
struct board_cell *board, struct solution_cell *sol,
int x, int y)
{
struct desc_cell curr;
if (desc) {
curr.shown = desc[(y * params->width) + x].shown;
curr.clue = desc[(y * params->width) + x].clue;
curr.full = desc[(y * params->width) + x].full;
curr.empty = desc[(y * params->width) + x].empty;
} else {
curr.shown = board[(y * params->width) + x].shown;
curr.clue = board[(y * params->width) + x].clue;
curr.full = false;
curr.empty = false;
}
int marked = 0, total = 0, blank = 0;
if (sol[(y * params->width) + x].solved) {
return 0;
}
count_around(params, sol, x, y, &marked, &blank, &total);
if (curr.full && curr.shown) {
sol[(y * params->width) + x].solved = true;
if (marked + blank < total) {
sol[(y * params->width) + x].needed = true;
}
mark_around(params, sol, x, y, STATE_MARKED);
return 1;
}
if (curr.empty && curr.shown) {
sol[(y * params->width) + x].solved = true;
if (marked + blank < total) {
sol[(y * params->width) + x].needed = true;
}
mark_around(params, sol, x, y, STATE_BLANK);
return 1;
}
if (curr.shown) {
if (!sol[(y * params->width) + x].solved) {
if (marked == curr.clue) {
sol[(y * params->width) + x].solved = true;
if (total != marked + blank) {
sol[(y * params->width) + x].needed = true;
}
mark_around(params, sol, x, y, STATE_BLANK);
} else if (curr.clue == (total - blank)) {
sol[(y * params->width) + x].solved = true;
if (total != marked + blank) {
sol[(y * params->width) + x].needed = true;
}
mark_around(params, sol, x, y, STATE_MARKED);
} else if (total == marked + blank) {
return -1;
} else {
return 0;
}
return 1;
}
return 0;
} else if (total == marked + blank) {
sol[(y * params->width) + x].solved = true;
return 1;
} else {
return 0;
}
}
static bool solve_check(const game_params *params, struct desc_cell *desc,
random_state *rs, struct solution_cell **sol_return)
{
int x, y, i;
int board_size = params->height * params->width;
struct solution_cell *sol = snewn(board_size, struct solution_cell),
*curr_sol;
bool made_progress = true, error = false;
int solved = 0, curr = 0, shown = 0;
needed_list_item *head = NULL, *curr_needed, **needed_array;
struct desc_cell *curr_desc;
memset(sol, 0, board_size * sizeof(*sol));
for (y = 0; y < params->height; y++) {
for (x = 0; x < params->width; x++) {
curr_desc = get_coords(params, desc, x, y);
if (curr_desc->shown) {
curr_needed = snew(needed_list_item);
curr_needed->next = head;
head = curr_needed;
curr_needed->x = x;
curr_needed->y = y;
shown++;
}
}
}
needed_array = snewn(shown, needed_list_item *);
curr_needed = head;
i = 0;
while (curr_needed) {
needed_array[i] = curr_needed;
curr_needed = curr_needed->next;
i++;
}
if (rs) {
shuffle(needed_array, shown, sizeof(*needed_array), rs);
}
solved = 0;
while (solved < shown && made_progress && !error) {
made_progress = false;
for (i = 0; i < shown; i++) {
curr = solve_cell(params, desc, NULL, sol, needed_array[i]->x,
needed_array[i]->y);
if (curr < 0) {
error = true;
#ifdef DEBUG_PRINTS
printf("error in cell x=%d, y=%d\n", needed_array[i]->x,
needed_array[i]->y);
#endif
break;
}
if (curr > 0) {
solved++;
made_progress = true;
}
}
}
while (head) {
curr_needed = head;
head = curr_needed->next;
sfree(curr_needed);
}
sfree(needed_array);
solved = 0;
/* verifying all the board is solved */
if (made_progress) {
for (y = 0; y < params->height; y++) {
for (x = 0; x < params->width; x++) {
curr_sol = get_coords(params, sol, x, y);
if ((curr_sol->cell & (STATE_MARKED | STATE_BLANK)) > 0) {
solved++;
}
}
}
}
if (sol_return) {
*sol_return = sol;
} else {
sfree(sol);
}
return solved == board_size;
}
static bool solve_game_actual(const game_params *params,
struct board_cell *desc,
struct solution_cell **sol_return)
{
int x, y;
int board_size = params->height * params->width;
struct solution_cell *sol = snewn(board_size, struct solution_cell);
bool made_progress = true, error = false;
int solved = 0, iter = 0, curr = 0;
memset(sol, 0, params->height * params->width * sizeof(*sol));
solved = 0;
while (solved < params->height * params->width && made_progress
&& !error) {
for (y = 0; y < params->height; y++) {
for (x = 0; x < params->width; x++) {
curr = solve_cell(params, NULL, desc, sol, x, y);
if (curr < 0) {
error = true;
#ifdef DEBUG_PRINTS
printf("error in cell x=%d, y=%d\n", x, y);
#endif
break;
}
if (curr > 0) {
made_progress = true;
}
solved += curr;
}
}
iter++;
}
if (sol_return) {
*sol_return = sol;
} else {
sfree(sol);
}
return solved == params->height * params->width;
}
static void hide_clues(const game_params *params, struct desc_cell *desc,
random_state *rs)
{
int shown, total, x, y, i;
int needed = 0;
struct desc_cell *curr;
struct solution_cell *sol = NULL, *curr_sol = NULL;
needed_list_item *head = NULL, *curr_needed, **needed_array;
#ifdef DEBUG_PRINTS
printf("Hiding clues\n");
#endif
solve_check(params, desc, rs, &sol);
for (y = 0; y < params->height; y++) {
for (x = 0; x < params->width; x++) {
count_clues_around(params, desc, x, y, &shown, &total);
curr = get_coords(params, desc, x, y);
curr_sol = get_coords(params, sol, x, y);
if (curr_sol->needed && params->aggressive) {
curr_needed = snew(needed_list_item);
curr_needed->x = x;
curr_needed->y = y;
curr_needed->next = head;
head = curr_needed;
needed++;
} else if (!curr_sol->needed) {
curr->shown = false;
}
}
}
if (params->aggressive) {
curr_needed = head;
needed_array = snewn(needed, needed_list_item *);
memset(needed_array, 0, needed * sizeof(*needed_array));
i = 0;
while (curr_needed) {
needed_array[i] = curr_needed;
curr_needed = curr_needed->next;
i++;
}
shuffle(needed_array, needed, sizeof(*needed_array), rs);
for (i = 0; i < needed; i++) {
curr_needed = needed_array[i];
curr =
get_coords(params, desc, curr_needed->x, curr_needed->y);
if (curr) {
curr->shown = false;
if (!solve_check(params, desc, NULL, NULL)) {
#ifdef DEBUG_PRINTS
printf("Hiding cell %d, %d not possible.\n",
curr_needed->x, curr_needed->y);
#endif
curr->shown = true;
}
sfree(curr_needed);
needed_array[i] = NULL;
}
curr_needed = NULL;
}
sfree(needed_array);
}
#ifdef DEBUG_PRINTS
printf("needed %d\n", needed);
#endif
sfree(sol);
}
static bool start_point_check(size_t size, struct desc_cell *desc)
{
int i;
for (i = 0; i < size; i++) {
if (desc[i].empty || desc[i].full) {
return true;
}
}
return false;
}
static void game_get_cursor_location(const game_ui *ui,
const game_drawstate *ds,
const game_state *state,
const game_params *params, int *x,
int *y, int *w, int *h)
{
if (ui->cur_visible) {
*x = COORD_FROM_CELL(ui->cur_x);
*y = COORD_FROM_CELL(ui->cur_y);
*w = *h = ds->tilesize;
}
}
static void generate_image(const game_params *params, random_state *rs,
bool *image)
{
int x, y;
for (y = 0; y < params->height; y++) {
for (x = 0; x < params->width; x++) {
image[(y * params->width) + x] = random_bits(rs, 1);
}
}
}
static char *new_game_desc(const game_params *params, random_state *rs,
char **aux, bool interactive)
{
bool *image = snewn(params->height * params->width, bool);
bool valid = false;
char *desc_string = snewn((params->height * params->width) + 1, char);
char *compressed_desc =
snewn((params->height * params->width) + 1, char);
char space_count;
struct desc_cell *desc =
snewn(params->height * params->width, struct desc_cell);
int x, y, location_in_str;
while (!valid) {
generate_image(params, rs, image);
#ifdef DEBUG_IMAGE
image[0] = 1;
image[1] = 1;
image[2] = 0;
image[3] = 1;
image[4] = 1;
image[5] = 0;
image[6] = 0;
image[7] = 0;
image[8] = 0;
#endif
for (y = 0; y < params->height; y++) {
for (x = 0; x < params->width; x++) {
populate_cell(params, image, x, y,
x * y == 0 || y == params->height - 1 ||
x == params->width - 1,
&desc[(y * params->width) + x]);
}
}
valid =
start_point_check((params->height - 1) * (params->width - 1),
desc);
if (!valid) {
#ifdef DEBUG_PRINTS
printf("Not valid, regenerating.\n");
#endif
} else {
valid = solve_check(params, desc, rs, NULL);
if (!valid) {
#ifdef DEBUG_PRINTS
printf("Couldn't solve, regenerating.");
#endif
} else {
hide_clues(params, desc, rs);
}
}
}
location_in_str = 0;
for (y = 0; y < params->height; y++) {
for (x = 0; x < params->width; x++) {
if (desc[(y * params->width) + x].shown) {
#ifdef DEBUG_PRINTS
printf("%d(%d)", desc[(y * params->width) + x].value,
desc[(y * params->width) + x].clue);
#endif
sprintf(desc_string + location_in_str, "%d",
desc[(y * params->width) + x].clue);
} else {
#ifdef DEBUG_PRINTS
printf("%d( )", desc[(y * params->width) + x].value);
#endif
sprintf(desc_string + location_in_str, " ");
}
location_in_str += 1;
}
#ifdef DEBUG_PRINTS
printf("\n");
#endif
}
location_in_str = 0;
space_count = 'a' - 1;
for (y = 0; y < params->height; y++) {
for (x = 0; x < params->width; x++) {
if (desc[(y * params->width) + x].shown) {
if (space_count >= 'a') {
sprintf(compressed_desc + location_in_str, "%c",
space_count);
location_in_str++;
space_count = 'a' - 1;
}
sprintf(compressed_desc + location_in_str, "%d",
desc[(y * params->width) + x].clue);
location_in_str++;
} else {
if (space_count <= 'z') {
space_count++;
} else {
sprintf(compressed_desc + location_in_str, "%c",
space_count);
location_in_str++;
space_count = 'a' - 1;
}
}
}
}
if (space_count >= 'a') {
sprintf(compressed_desc + location_in_str, "%c", space_count);
location_in_str++;
}
compressed_desc[location_in_str] = '\0';
#ifdef DEBUG_PRINTS
printf("compressed_desc: %s\n", compressed_desc);
#endif
return compressed_desc;
}
static const char *validate_desc(const game_params *params,
const char *desc)
{
int size_dest = params->height * params->width;
int length;
length = 0;
while (*desc != '\0') {
if (*desc >= 'a' && *desc <= 'z') {
length += *desc - 'a';
} else if (*desc < '0' || *desc > '9')
return "Invalid character in game description";
length++;
desc++;
}
if (length != size_dest) {
return "Desc size mismatch";
}
return NULL;
}
static game_state *new_game(midend *me, const game_params *params,
const char *desc)
{
game_state *state = snew(game_state);
char *curr_desc = dupstr(desc);
char *desc_base = curr_desc;
int dest_loc;
int spaces, total_spaces;
state->cheating = false;
state->not_completed_clues = 0;
dest_loc = 0;
state->height = params->height;
state->width = params->width;
state->cells_contents = snewn(params->height * params->width, char);
memset(state->cells_contents, 0, params->height * params->width);
state->board = snew(board_state);
state->board->references = 1;
state->board->actual_board =
snewn(params->height * params->width, struct board_cell);
while (*curr_desc != '\0') {
if (*curr_desc >= '0' && *curr_desc <= '9') {
state->board->actual_board[dest_loc].shown = true;
state->not_completed_clues++;
state->board->actual_board[dest_loc].clue = *curr_desc - '0';
} else {
if (*curr_desc != ' ') {
total_spaces = *curr_desc - 'a' + 1;
} else {
total_spaces = 1;
}
spaces = 0;
while (spaces < total_spaces) {
state->board->actual_board[dest_loc].shown = false;
state->board->actual_board[dest_loc].clue = -1;
spaces++;
if (spaces < total_spaces) {
dest_loc++;
}
}
}
curr_desc++;
dest_loc++;
}
sfree(desc_base);
return state;
}
static game_state *dup_game(const game_state *state)
{
game_state *ret = snew(game_state);
ret->cheating = state->cheating;
ret->not_completed_clues = state->not_completed_clues;
ret->width = state->width;
ret->height = state->height;
ret->cells_contents = snewn(state->height * state->width, char);
memcpy(ret->cells_contents, state->cells_contents,
state->height * state->width);
ret->board = state->board;
ret->board->references++;
return ret;
}
static void free_game(game_state *state)
{
sfree(state->cells_contents);
state->cells_contents = NULL;
if (state->board->references <= 1) {
sfree(state->board->actual_board);
sfree(state->board);
state->board = NULL;
} else {
state->board->references--;
}
sfree(state);
}
static char *solve_game(const game_state *state,
const game_state *currstate, const char *aux,
const char **error)
{
struct solution_cell *sol = NULL;
game_params param;
bool solved;
char *ret = NULL;
unsigned int curr_ret;
int i, bits, ret_loc = 1;
int size = state->width * state->height;
param.width = state->width;
param.height = state->height;
solved = solve_game_actual(&param, state->board->actual_board, &sol);
if (!solved) {
*error = dupstr("Could not solve this board");
sfree(sol);
return NULL;
}
ret = snewn((size / 4) + 3, char);
ret[0] = 's';
i = 0;
while (i < size) {
curr_ret = 0;
bits = 0;
while (bits < 8 && i < size) {
curr_ret <<= 1;
curr_ret |= sol[i].cell == STATE_MARKED;
i++;
bits++;
}
curr_ret <<= 8 - bits;
sprintf(ret + ret_loc, "%02x", curr_ret);
ret_loc += 2;
}
sfree(sol);
return ret;
}
static bool game_can_format_as_text_now(const game_params *params)
{
return true;
}
static char *game_text_format(const game_state *state)
{
char *desc_string =
snewn((state->height * state->width) * 3 + 1, char);
int location_in_str = 0, x, y;
for (y = 0; y < state->height; y++) {
for (x = 0; x < state->width; x++) {
if (state->board->actual_board[(y * state->width) + x].shown) {
sprintf(desc_string + location_in_str, "|%d|",
state->board->actual_board[(y * state->width) +
x].clue);
} else {
sprintf(desc_string + location_in_str, "| |");
}
location_in_str += 3;
}
sprintf(desc_string + location_in_str, "\n");
location_in_str += 1;
}
return desc_string;
}
static game_ui *new_ui(const game_state *state)
{
game_ui *ui = snew(game_ui);
ui->last_x = -1;
ui->last_y = -1;
ui->last_state = 0;
ui->solved = false;
ui->cur_x = ui->cur_y = 0;
ui->cur_visible = getenv_bool("PUZZLES_SHOW_CURSOR", false);
return ui;
}
static void free_ui(game_ui *ui)
{
sfree(ui);
}
static void game_changed_state(game_ui *ui, const game_state *oldstate,
const game_state *newstate)
{
}
static const char *current_key_label(const game_ui *ui,
const game_state *state, int button)
{
char *cell;
if (IS_CURSOR_SELECT(button)) {
if (!ui->cur_visible || state->not_completed_clues == 0) return "";
cell = get_coords(state, state->cells_contents, ui->cur_x, ui->cur_y);
switch (*cell & STATE_OK_NUM) {
case STATE_UNMARKED:
return button == CURSOR_SELECT ? "Black" : "White";
case STATE_MARKED:
return button == CURSOR_SELECT ? "White" : "Empty";
case STATE_BLANK:
return button == CURSOR_SELECT ? "Empty" : "Black";
}
}
return "";
}
static char *interpret_move(const game_state *state, game_ui *ui,
const game_drawstate *ds, int x, int y,
int button)
{
int srcX = ui->last_x, srcY = ui->last_y;
int offsetX, offsetY, gameX, gameY, i;
int dirX, dirY, diff;
char move_type;
char move_desc[80];
char *ret = NULL;
const char *cell_state;
bool changed = false;
if (state->not_completed_clues == 0 && !IS_CURSOR_MOVE(button)) {
return NULL;
}
offsetX = x - (ds->tilesize / 2);
offsetY = y - (ds->tilesize / 2);
gameX = offsetX / ds->tilesize;
gameY = offsetY / ds->tilesize;
if ((IS_MOUSE_DOWN(button) || IS_MOUSE_DRAG(button) || IS_MOUSE_RELEASE(button))
&& ((offsetX < 0) || (offsetY < 0)))
return NULL;
if (button == LEFT_BUTTON || button == RIGHT_BUTTON) {
cell_state =
get_coords(state, state->cells_contents, gameX, gameY);
if (cell_state) {
ui->last_state = *cell_state & (STATE_BLANK | STATE_MARKED);
ui->last_state =
(ui->last_state +
((button ==
RIGHT_BUTTON) ? 2 : 1)) % (STATE_BLANK | STATE_MARKED);
}
if (button == RIGHT_BUTTON) {
/* Right button toggles twice */
move_type = 'T';
} else {
move_type = 't';
}
if (gameX >= 0 && gameY >= 0 && gameX < state->width &&
gameY < state->height) {
sprintf(move_desc, "%c%d,%d", move_type, gameX, gameY);
ui->last_x = gameX;
ui->last_y = gameY;
ret = dupstr(move_desc);
} else {
ui->last_x = -1;
ui->last_y = -1;
}
changed = true;
ui->cur_visible = false;
} else if (button == LEFT_DRAG || button == RIGHT_DRAG) {
move_type = 'd';
/* allowing only drags in straight lines */
if (gameX >= 0 && gameY >= 0 && gameX < state->width &&
gameY < state->height && ui->last_x >= 0 && ui->last_y >= 0 &&
(gameY == ui->last_y || gameX == ui->last_x)) {
sprintf(move_desc, "%c%d,%d,%d,%d,%d", move_type, gameX, gameY,
ui->last_x, ui->last_y, ui->last_state);
if (srcX == gameX && srcY != gameY) {
dirX = 0;
diff = srcY - gameY;
if (diff < 0) {
dirY = -1;
diff *= -1;
} else {
dirY = 1;
}
} else {
diff = srcX - gameX;
dirY = 0;
if (diff < 0) {
dirX = -1;
diff *= -1;
} else {
dirX = 1;
}
}
for (i = 0; i < diff; i++) {
cell_state = get_coords(state, state->cells_contents,
gameX + (dirX * i),
gameY + (dirY * i));
if (cell_state && (*cell_state & STATE_OK_NUM) == 0
&& ui->last_state > 0) {
changed = true;
break;
}
}
ui->last_x = gameX;
ui->last_y = gameY;
if (changed) {
ret = dupstr(move_desc);
}
} else {
ui->last_x = -1;
ui->last_y = -1;
}
ui->cur_visible = false;
} else if (button == LEFT_RELEASE || button == RIGHT_RELEASE) {
move_type = 'e';
if (gameX >= 0 && gameY >= 0 && gameX < state->width &&
gameY < state->height && ui->last_x >= 0 && ui->last_y >= 0 &&
(gameY == ui->last_y || gameX == ui->last_x)) {
sprintf(move_desc, "%c%d,%d,%d,%d,%d", move_type, gameX, gameY,
ui->last_x, ui->last_y, ui->last_state);
if (srcX == gameX && srcY != gameY) {
dirX = 0;
diff = srcY - gameY;
if (diff < 0) {
dirY = -1;
diff *= -1;
} else {
dirY = 1;
}
} else {
diff = srcX - gameX;
dirY = 0;
if (diff < 0) {
dirX = -1;
diff *= -1;
} else {
dirX = 1;
}
}
for (i = 0; i < diff; i++) {
cell_state = get_coords(state, state->cells_contents,
gameX + (dirX * i),
gameY + (dirY * i));
if (cell_state && (*cell_state & STATE_OK_NUM) == 0
&& ui->last_state > 0) {
changed = true;
break;
}
}
if (changed) {
ret = dupstr(move_desc);
}
} else {
ui->last_x = -1;
ui->last_y = -1;
}
ui->cur_visible = false;
} else if (IS_CURSOR_MOVE(button)) {
ui->prev_cur_x = ui->cur_x;
ui->prev_cur_y = ui->cur_y;
move_cursor(button, &ui->cur_x, &ui->cur_y, state->width,
state->height, false);
ui->cur_visible = true;
return MOVE_UI_UPDATE;
} else if (IS_CURSOR_SELECT(button)) {
if (!ui->cur_visible) {
ui->cur_x = 0;
ui->cur_y = 0;
ui->cur_visible = true;
return MOVE_UI_UPDATE;
}
if (button == CURSOR_SELECT2) {
sprintf(move_desc, "T%d,%d", ui->cur_x, ui->cur_y);
ret = dupstr(move_desc);
} else {
/* Otherwise, treat as LEFT_BUTTON, for a single square. */
sprintf(move_desc, "t%d,%d", ui->cur_x, ui->cur_y);
ret = dupstr(move_desc);
}
}
return ret;
}
static void update_board_state_around(game_state *state, int x, int y)
{
int i, j;
struct board_cell *curr;
char *curr_state;
int total;
int blank;
int marked;
for (i = -1; i < 2; i++) {
for (j = -1; j < 2; j++) {
curr =
get_coords(state, state->board->actual_board, x + i,
y + j);
if (curr && curr->shown) {
curr_state =
get_coords(state, state->cells_contents, x + i, y + j);
count_around_state(state, x + i, y + j, &marked, &blank,
&total);
if (curr->clue == marked && (total - marked - blank) == 0) {
*curr_state &= STATE_MARKED | STATE_BLANK;
*curr_state |= STATE_SOLVED;
} else if (curr->clue < marked
|| curr->clue > (total - blank)) {
*curr_state &= STATE_MARKED | STATE_BLANK;
*curr_state |= STATE_ERROR;
} else {
*curr_state &= STATE_MARKED | STATE_BLANK;
}
}
}
}
}
static game_state *execute_move(const game_state *state, const char *move)
{
game_state *new_state = dup_game(state);
int i = 0, x = -1, y = -1, clues_left = 0;
int srcX = -1, srcY = -1, size = state->height * state->width;
const char *p;
char *cell, sol_char;
int steps = 1, bits, sol_location, dirX, dirY, diff,
last_state = STATE_UNMARKED;
unsigned int sol_value;
struct board_cell *curr_cell;
char move_type;
int nparams = 0, move_params[5];
p = move;
move_type = *p++;
switch (move_type) {
case 't':
case 'T':
nparams = 2;
break;
case 'd':
case 'e':
nparams = 5;
break;
}
for (i = 0; i < nparams; i++) {
move_params[i] = atoi(p);
while (*p && isdigit((unsigned char)*p)) p++;
if (i+1 < nparams) {
if (*p != ',') {
free_game(new_state);
return NULL;
}
p++;
}
}
if (move_type == 't' || move_type == 'T') {
if (move_type == 'T') {
steps++;
}
x = move_params[0];
y = move_params[1];
if (x == -1 || y == -1) {
return new_state;
}
cell = get_coords(new_state, new_state->cells_contents, x, y);
if (cell == NULL) {
free_game(new_state);
return NULL;
}
if (*cell >= STATE_OK_NUM) {
*cell &= STATE_OK_NUM;
}
*cell = (*cell + steps) % STATE_OK_NUM;
update_board_state_around(new_state, x, y);
} else if (move_type == 's') {
new_state->not_completed_clues = 0;
new_state->cheating = true;
sol_location = 0;
bits = 0;
i = 1;
while (i < strlen(move)) {
sol_value = 0;
while (bits < 8) {
sol_value <<= 4;
sol_char = move[i];
if (sol_char >= '0' && sol_char <= '9') {
sol_value |= sol_char - '0';
} else {
sol_value |= (sol_char - 'a') + 10;
}
bits += 4;
i++;
}
while (bits > 0 && sol_location < size) {
if (sol_value & 0x80) {
new_state->cells_contents[sol_location] =
STATE_MARKED_SOLVED;
} else {
new_state->cells_contents[sol_location] =
STATE_BLANK_SOLVED;
}
sol_value <<= 1;
bits--;
sol_location++;
}
}
return new_state;
} else if (move_type == 'd' || move_type == 'e') {
x = move_params[0];
y = move_params[1];
srcX = move_params[2];
srcY = move_params[3];
last_state = move_params[4];
if (srcX == x && srcY != y) {
dirX = 0;
diff = srcY - y;
if (diff < 0) {
dirY = -1;
diff *= -1;
} else {
dirY = 1;
}
} else {
diff = srcX - x;
dirY = 0;
if (diff < 0) {
dirX = -1;
diff *= -1;
} else {
dirX = 1;
}
}
for (i = 0; i < diff; i++) {
cell = get_coords(new_state, new_state->cells_contents,
x + (dirX * i), y + (dirY * i));
if (cell == NULL) {
free_game(new_state);
return NULL;
}
if ((*cell & STATE_OK_NUM) == 0) {
*cell = last_state;
update_board_state_around(new_state, x + (dirX * i),
y + (dirY * i));
}
}
}
for (y = 0; y < state->height; y++) {
for (x = 0; x < state->width; x++) {
cell = get_coords(new_state, new_state->cells_contents, x, y);
curr_cell = get_coords(new_state, new_state->board->actual_board,
x, y);
if (curr_cell->shown && ((*cell & STATE_SOLVED) == 0)) {
clues_left++;
}
}
}
new_state->not_completed_clues = clues_left;
return new_state;
}
/* ----------------------------------------------------------------------
* Drawing routines.
*/
static void game_compute_size(const game_params *params, int tilesize,
const game_ui *ui, int *x, int *y)
{
*x = (params->width + 1) * tilesize;
*y = (params->height + 1) * tilesize;
}
static void game_set_size(drawing *dr, game_drawstate *ds,
const game_params *params, int tilesize)
{
ds->tilesize = tilesize;
}
#define COLOUR(ret, i, r, g, b) \
((ret[3 * (i) + 0] = (r)), (ret[3 * (i) + 1] = (g)), (ret[3 * (i) + 2] = (b)))
static float *game_colours(frontend *fe, int *ncolours)
{
float *ret = snewn(3 * NCOLOURS, float);
frontend_default_colour(fe, &ret[COL_BACKGROUND * 3]);
COLOUR(ret, COL_GRID, 0.0F, 102 / 255.0F, 99 / 255.0F);
COLOUR(ret, COL_ERROR, 1.0F, 0.0F, 0.0F);
COLOUR(ret, COL_BLANK, 236 / 255.0F, 236 / 255.0F, 236 / 255.0F);
COLOUR(ret, COL_MARKED, 20 / 255.0F, 20 / 255.0F, 20 / 255.0F);
COLOUR(ret, COL_UNMARKED, 148 / 255.0F, 196 / 255.0F, 190 / 255.0F);
COLOUR(ret, COL_TEXT_SOLVED, 100 / 255.0F, 100 / 255.0F, 100 / 255.0F);
COLOUR(ret, COL_CURSOR, 255 / 255.0F, 200 / 255.0F, 200 / 255.0F);
*ncolours = NCOLOURS;
return ret;
}
/* Extra flags in game_drawstate entries, not in main game state */
#define DRAWFLAG_CURSOR 0x100
#define DRAWFLAG_CURSOR_U 0x200
#define DRAWFLAG_CURSOR_L 0x400
#define DRAWFLAG_CURSOR_UL 0x800
#define DRAWFLAG_MARGIN_R 0x1000
#define DRAWFLAG_MARGIN_D 0x2000
static game_drawstate *game_new_drawstate(drawing *dr, const game_state *state)
{
struct game_drawstate *ds = snew(game_drawstate);
int i;
ds->tilesize = 0;
ds->state = NULL;
ds->state = snewn((state->width + 1) * (state->height + 1), int);
for (i = 0; i < (state->width + 1) * (state->height + 1); i++)
ds->state[i] = -1;
return ds;
}
static void game_free_drawstate(drawing *dr, game_drawstate *ds)
{
sfree(ds->state);
sfree(ds);
}
static void draw_cell(drawing *dr, int cell, int ts, signed char clue_val,
int x, int y)
{
int startX = ((x * ts) + ts / 2) - 1, startY = ((y * ts) + ts / 2) - 1;
int color, text_color = COL_TEXT_DARK;
clip(dr, startX - 1, startY - 1, ts, ts);
if (!(cell & DRAWFLAG_MARGIN_R))
draw_rect(dr, startX - 1, startY - 1, ts, 1,
(cell & (DRAWFLAG_CURSOR | DRAWFLAG_CURSOR_U) ?
COL_CURSOR : COL_GRID));
if (!(cell & DRAWFLAG_MARGIN_D))
draw_rect(dr, startX - 1, startY - 1, 1, ts,
(cell & (DRAWFLAG_CURSOR | DRAWFLAG_CURSOR_L) ?
COL_CURSOR : COL_GRID));
if (cell & DRAWFLAG_CURSOR_UL)
draw_rect(dr, startX - 1, startY - 1, 1, 1, COL_CURSOR);
if (!(cell & (DRAWFLAG_MARGIN_R | DRAWFLAG_MARGIN_D))) {
if (cell & STATE_MARKED) {
color = COL_MARKED;
text_color = COL_TEXT_LIGHT;
} else if (cell & STATE_BLANK) {
text_color = COL_TEXT_DARK;
color = COL_BLANK;
} else {
text_color = COL_TEXT_DARK;
color = COL_UNMARKED;
}
if (cell & STATE_ERROR) {
text_color = COL_ERROR;
} else if (cell & STATE_SOLVED) {
text_color = COL_TEXT_SOLVED;
}
draw_rect(dr, startX, startY, ts - 1, ts - 1, color);
if (clue_val >= 0) {
char clue[80];
sprintf(clue, "%d", clue_val);
draw_text(dr, startX + ts / 2, startY + ts / 2, 1, ts * 3 / 5,
ALIGN_VCENTRE | ALIGN_HCENTRE, text_color, clue);
}
}
unclip(dr);
draw_update(dr, startX - 1, startY - 1, ts, ts);
}
static void game_redraw(drawing *dr, game_drawstate *ds,
const game_state *oldstate,
const game_state *state, int dir,
const game_ui *ui, float animtime,
float flashtime)
{
int x, y;
char status[80];
signed char clue_val;
bool flashing = (flashtime > 0 && (flashtime <= FLASH_TIME / 3 ||
flashtime > 2*FLASH_TIME / 3));
for (y = 0; y <= state->height; y++) {
for (x = 0; x <= state->width; x++) {
bool inbounds = x < state->width && y < state->height;
int cell = (inbounds ?
state->cells_contents[(y * state->width) + x] : 0);
if (x == state->width)
cell |= DRAWFLAG_MARGIN_R;
if (y == state->height)
cell |= DRAWFLAG_MARGIN_D;
if (flashing)
cell ^= (STATE_BLANK | STATE_MARKED);
if (ui->cur_visible) {
if (ui->cur_x == x && ui->cur_y == y)
cell |= DRAWFLAG_CURSOR;
if (ui->cur_x == x-1 && ui->cur_y == y)
cell |= DRAWFLAG_CURSOR_L;
if (ui->cur_x == x && ui->cur_y == y-1)
cell |= DRAWFLAG_CURSOR_U;
if (ui->cur_x == x-1 && ui->cur_y == y-1)
cell |= DRAWFLAG_CURSOR_UL;
}
if (inbounds &&
state->board->actual_board[(y * state->width) + x].shown) {
clue_val = state->board->actual_board[
(y * state->width) + x].clue;
} else {
clue_val = -1;
}
if (ds->state[(y * (state->width+1)) + x] != cell) {
draw_cell(dr, cell, ds->tilesize, clue_val, x, y);
ds->state[(y * (state->width+1)) + x] = cell;
}
}
}
sprintf(status, "Clues left: %d", state->not_completed_clues);
if (state->not_completed_clues == 0 && !state->cheating) {
sprintf(status, "COMPLETED!");
} else if (state->not_completed_clues == 0 && state->cheating) {
sprintf(status, "Auto solved");
}
status_bar(dr, status);
}
static float game_anim_length(const game_state *oldstate,
const game_state *newstate, int dir,
game_ui *ui)
{
return 0.0F;
}
static float game_flash_length(const game_state *oldstate,
const game_state *newstate, int dir,
game_ui *ui)
{
if (!oldstate->cheating && oldstate->not_completed_clues > 0 &&
newstate->not_completed_clues == 0) {
return FLASH_TIME;
}
return 0.0F;
}
static int game_status(const game_state *state)
{
if (state->not_completed_clues == 0)
return +1;
return 0;
}
#ifdef COMBINED
#define thegame mosaic
#endif
const struct game thegame = {
"Mosaic", "games.mosaic", "mosaic",
default_params,
game_fetch_preset, NULL,
decode_params,
encode_params,
free_params,
dup_params,
true, game_configure, custom_params,
validate_params,
new_game_desc,
validate_desc,
new_game,
dup_game,
free_game,
true, solve_game,
true, game_can_format_as_text_now, game_text_format,
NULL, NULL, /* get_prefs, set_prefs */
new_ui,
free_ui,
NULL, /* encode_ui */
NULL, /* decode_ui */
NULL, /* game_request_keys */
game_changed_state,
current_key_label,
interpret_move,
execute_move,
DEFAULT_TILE_SIZE, game_compute_size, game_set_size,
game_colours,
game_new_drawstate,
game_free_drawstate,
game_redraw,
game_anim_length,
game_flash_length,
game_get_cursor_location,
game_status,
false, false, NULL, NULL, /* print_size, print */
true, /* wants_statusbar */
false, NULL, /* timing_state */
0, /* flags */
};
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