Subversion Repositories Games.Prince of Persia

/*

SDLPoP, a port/conversion of the DOS game Prince of Persia.

Copyright (C) 2013-2018  Dávid Nagy

This program 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.

This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

The authors of this program may be contacted at http://forum.princed.org

*/

#include "common.h"

#include <ctype.h>

#include <inttypes.h>

extern int filter_level;

void disable_fixes_and_enhancements() {

        enable_crouch_after_climbing = 0;

        enable_freeze_time_during_end_music = 0;

        enable_remember_guard_hp = 0;

        fix_gate_sounds = 0;

        fix_two_coll_bug = 0;

        fix_infinite_down_bug = 0;

        fix_gate_drawing_bug = 0;

        fix_bigpillar_climb = 0;

        fix_jump_distance_at_edge = 0;

        fix_edge_distance_check_when_climbing = 0;

        fix_painless_fall_on_guard = 0;

        fix_wall_bump_triggers_tile_below = 0;

        fix_stand_on_thin_air = 0;

        fix_press_through_closed_gates = 0;

        fix_grab_falling_speed = 0;

        fix_skeleton_chomper_blood = 0;

        fix_move_after_drink = 0;

        fix_loose_left_of_potion = 0;

        fix_guard_following_through_closed_gates = 0;

        fix_safe_landing_on_spikes = 0;

        fix_glide_through_wall = 0;

        fix_drop_through_tapestry = 0;

        fix_land_against_gate_or_tapestry = 0;

        fix_unintended_sword_strike = 0;

        fix_retreat_without_leaving_room = 0;

        fix_running_jump_through_tapestry= 0;

        fix_push_guard_into_wall = 0;

        fix_jump_through_wall_above_gate = 0;

        fix_chompers_not_starting = 0;

        fix_feather_interrupted_by_leveldoor = 0;

        fix_offscreen_guards_disappearing = 0;

        fix_move_after_sheathe = 0;

}

// .ini file parser adapted from https://gist.github.com/OrangeTide/947070

/* Load an .ini format file

 * filename - path to a file

 * report - callback can return non-zero to stop, the callback error code is

 *     returned from this function.

 * return - return 0 on success

 */

int ini_load(const char *filename,

             int (*report)(const char *section, const char *name, const char *value))

{

        char name[64];

        char value[256];

        char section[128] = "";

        char *s;

        FILE *f;

        int cnt;

        f = fopen(filename, "r");

        if (!f) {

                return -1;

        }

        while (!feof(f)) {

                if (fscanf(f, "[%127[^];\n]]\n", section) == 1) {

                } else if ((cnt = fscanf(f, " %63[^=;\n] = %255[^;\n]", name, value))) {

                        if (cnt == 1)

                                *value = 0;

                        for (s = name + strlen(name) - 1; s > name && isspace(*s); s--)

                                *s = 0;

                        for (s = value + strlen(value) - 1; s > value && isspace(*s); s--)

                                *s = 0;

                        report(section, name, value);

                }

                fscanf(f, " ;%*[^\n]");

                fscanf(f, " \n");

        }

        fclose(f);

        return 0;

}

#define MAX_NAME_LENGTH 20

typedef struct ini_value_list_type {

        const char (* names)[][MAX_NAME_LENGTH];

        word num_names;

} ini_value_list_type;

const char level_type_names[][MAX_NAME_LENGTH] = {"dungeon", "palace"};

const char guard_type_names[][MAX_NAME_LENGTH] = {"guard", "fat", "skel", "vizier", "shadow"};

const char tile_type_names[][MAX_NAME_LENGTH] = {

                                "empty", "floor", "spike", "pillar", "gate",                                        // 0..4

                                "stuck", "closer", "doortop_with_floor", "bigpillar_bottom", "bigpillar_top",       // 5..9

                                "potion", "loose", "doortop", "mirror", "debris",                                   // 10..14

                                "opener", "level_door_left", "level_door_right", "chomper", "torch",                // 15..19

                                "wall", "skeleton", "sword", "balcony_left", "balcony_right",                       // 20..24

                                "lattice_pillar", "lattice_down", "lattice_small", "lattice_left", "lattice_right", // 25..29

                                "torch_with_debris", // 30

};

ini_value_list_type level_type_names_list = {&level_type_names, COUNT(level_type_names)};

ini_value_list_type guard_type_names_list = {&guard_type_names, COUNT(guard_type_names)};

ini_value_list_type tile_type_names_list = {&tile_type_names, COUNT(tile_type_names)};

#define INI_NO_VALID_NAME -9999

static inline int ini_get_named_value(const char* value, ini_value_list_type* value_names) {

        if (value_names != NULL) {

                int i;

                char *base_ptr = (char *) value_names->names;

                for (i = 0; i < value_names->num_names; ++i) {

                        char *name = (base_ptr + i * MAX_NAME_LENGTH);

                        if (strcasecmp(value, name) == 0) return i;

                }

        }

        return INI_NO_VALID_NAME; // failure

}

static inline int ini_process_boolean(const char* curr_name, const char* value, const char* option_name, byte* target) {

        if(strcasecmp(curr_name, option_name) == 0) {

                if (strcasecmp(value, "true") == 0) *target = 1;

                else if (strcasecmp(value, "false") == 0) *target = 0;

                return 1; // finished; don't look for more possible options that curr_name can be

        }

        return 0; // not the right option; should check another option_name

}

#define ini_process_numeric_func(data_type) \

static inline int ini_process_##data_type(const char* curr_name, const char* value, const char* option_name, data_type* target, ini_value_list_type* value_names) { \

        if(strcasecmp(curr_name, option_name) == 0) { \

                if (strcasecmp(value, "default") != 0) { \

                        int named_value = ini_get_named_value(value, value_names); \

                        *target = (named_value == INI_NO_VALID_NAME) ? ((data_type) strtoimax(value, NULL, 0)) : ((data_type) named_value); \

                } \

                return 1; /* finished; don't look for more possible options that curr_name can be */ \

        } \

        return 0; /* not the right option; should check another option_name */ \

}

ini_process_numeric_func(word)

ini_process_numeric_func(short)

ini_process_numeric_func(byte)

ini_process_numeric_func(int)

static int global_ini_callback(const char *section, const char *name, const char *value)

{

        //fprintf(stdout, "[%s] '%s'='%s'\n", section, name, value);

        #define check_ini_section(section_name)    (strcasecmp(section, section_name) == 0)

        // Make sure that we return successfully as soon as name matches the correct option_name

        #define process_word(option_name, target, value_names)                           \

        if (ini_process_word(name, value, option_name, target, value_names)) return 1;

        #define process_short(option_name, target, value_names)                           \

        if (ini_process_short(name, value, option_name, target, value_names)) return 1;

        #define process_byte(option_name, target, value_names)                           \

        if (ini_process_byte(name, value, option_name, target, value_names)) return 1;

        #define process_int(option_name, target, value_names)                           \

        if (ini_process_int(name, value, option_name, target, value_names)) return 1;

        #define process_boolean(option_name, target)                        \

        if (ini_process_boolean(name, value, option_name, target)) return 1;

        if (check_ini_section("General")) {

                process_boolean("enable_copyprot", &enable_copyprot);

                process_boolean("enable_mixer", &enable_mixer);

                process_boolean("enable_fade", &enable_fade);

                process_boolean("enable_flash", &enable_flash);

                process_boolean("enable_text", &enable_text);

                process_boolean("enable_info_screen", &enable_info_screen);

                process_boolean("start_fullscreen", &start_fullscreen);

                process_word("pop_window_width", &pop_window_width, NULL);

                process_word("pop_window_height", &pop_window_height, NULL);

                process_boolean("use_correct_aspect_ratio", &use_correct_aspect_ratio);

                process_boolean("use_integer_scaling", &use_integer_scaling);

                process_boolean("enable_controller_rumble", &enable_controller_rumble);

                process_boolean("joystick_only_horizontal", &joystick_only_horizontal);

                process_int("joystick_threshold", &joystick_threshold, NULL);

                if (strcasecmp(name, "levelset") == 0) {

                        if (value[0] == '\0' || strcasecmp(value, "original") == 0 || strcasecmp(value, "default") == 0) {

                                use_custom_levelset = 0;

                        } else {

                                use_custom_levelset = 1;

                                strcpy(levelset_name, value);

                        }

                        return 1;

                }

        }

        if (check_ini_section("AdditionalFeatures")) {

                process_boolean("enable_quicksave", &enable_quicksave);

                process_boolean("enable_quicksave_penalty", &enable_quicksave_penalty);

#ifdef USE_REPLAY

                process_boolean("enable_replay", &enable_replay);

                if (strcasecmp(name, "replays_folder") == 0) {

                        if (value[0] != '\0' && strcasecmp(value, "default") != 0) {

                                strcpy(replays_folder, value);

                        }

                        return 1;

                }

#endif

#ifdef USE_LIGHTING

                process_boolean("enable_lighting", &enable_lighting);

#endif

                process_int("filter_level", &filter_level, NULL);

                if (filter_level < 1)

                        filter_level = 1;

                else if (filter_level > 6)

                        filter_level = 6;

        }

        if (check_ini_section("Enhancements")) {

                if (strcasecmp(name, "use_fixes_and_enhancements") == 0) {

                        if (strcasecmp(value, "true") == 0) use_fixes_and_enhancements = 1;

                        else if (strcasecmp(value, "false") == 0) use_fixes_and_enhancements = 0;

                        else if (strcasecmp(value, "prompt") == 0) use_fixes_and_enhancements = 2;

                        return 1;

                }

                process_boolean("enable_crouch_after_climbing", &enable_crouch_after_climbing);

                process_boolean("enable_freeze_time_during_end_music", &enable_freeze_time_during_end_music);

                process_boolean("enable_remember_guard_hp", &enable_remember_guard_hp);

                process_boolean("fix_gate_sounds", &fix_gate_sounds);

                process_boolean("fix_two_coll_bug", &fix_two_coll_bug);

                process_boolean("fix_infinite_down_bug", &fix_infinite_down_bug);

                process_boolean("fix_gate_drawing_bug", &fix_gate_drawing_bug);

                process_boolean("fix_bigpillar_climb", &fix_bigpillar_climb);

                process_boolean("fix_jump_distance_at_edge", &fix_jump_distance_at_edge);

                process_boolean("fix_edge_distance_check_when_climbing", &fix_edge_distance_check_when_climbing);

                process_boolean("fix_painless_fall_on_guard", &fix_painless_fall_on_guard);

                process_boolean("fix_wall_bump_triggers_tile_below", &fix_wall_bump_triggers_tile_below);

                process_boolean("fix_stand_on_thin_air", &fix_stand_on_thin_air);

                process_boolean("fix_press_through_closed_gates", &fix_press_through_closed_gates);

                process_boolean("fix_grab_falling_speed", &fix_grab_falling_speed);

                process_boolean("fix_skeleton_chomper_blood", &fix_skeleton_chomper_blood);

                process_boolean("fix_move_after_drink", &fix_move_after_drink);

                process_boolean("fix_loose_left_of_potion", &fix_loose_left_of_potion);

                process_boolean("fix_guard_following_through_closed_gates", &fix_guard_following_through_closed_gates);

                process_boolean("fix_safe_landing_on_spikes", &fix_safe_landing_on_spikes);

                process_boolean("fix_glide_through_wall", &fix_glide_through_wall);

                process_boolean("fix_drop_through_tapestry", &fix_drop_through_tapestry);

                process_boolean("fix_land_against_gate_or_tapestry", &fix_land_against_gate_or_tapestry);

                process_boolean("fix_unintended_sword_strike", &fix_unintended_sword_strike);

                process_boolean("fix_retreat_without_leaving_room", &fix_retreat_without_leaving_room);

                process_boolean("fix_running_jump_through_tapestry", &fix_running_jump_through_tapestry);

                process_boolean("fix_push_guard_into_wall", &fix_push_guard_into_wall);

                process_boolean("fix_jump_through_wall_above_gate", &fix_jump_through_wall_above_gate);

                process_boolean("fix_chompers_not_starting", &fix_chompers_not_starting);

                process_boolean("fix_feather_interrupted_by_leveldoor", &fix_feather_interrupted_by_leveldoor);

                process_boolean("fix_offscreen_guards_disappearing", &fix_offscreen_guards_disappearing);

                process_boolean("fix_move_after_sheathe", &fix_move_after_sheathe);

        }

        if (check_ini_section("CustomGameplay")) {

                process_word("start_minutes_left", &start_minutes_left, NULL);

                process_word("start_ticks_left", &start_ticks_left, NULL);

                process_word("start_hitp", &start_hitp, NULL);

                process_word("max_hitp_allowed", &max_hitp_allowed, NULL);

                process_word("saving_allowed_first_level", &saving_allowed_first_level, NULL);

                process_word("saving_allowed_last_level", &saving_allowed_last_level, NULL);

                process_boolean("start_upside_down", &start_upside_down);

                process_boolean("start_in_blind_mode", &start_in_blind_mode);

                process_word("copyprot_level", &copyprot_level, NULL);

                process_byte("drawn_tile_top_level_edge", &drawn_tile_top_level_edge, &tile_type_names_list);

                process_byte("drawn_tile_left_level_edge", &drawn_tile_left_level_edge, &tile_type_names_list);

                process_byte("level_edge_hit_tile", &level_edge_hit_tile, &tile_type_names_list);

                process_boolean("allow_triggering_any_tile", &allow_triggering_any_tile);

                // TODO: Maybe allow automatically choosing the correct WDA, depending on the loaded VDUNGEON.DAT?

                process_boolean("enable_wda_in_palace", &enable_wda_in_palace);

                // Options that change the hard-coded color palette (options 'vga_color_0', 'vga_color_1', ...)

                static const char prefix[] = "vga_color_";

                static const size_t prefix_len = sizeof(prefix)-1;

                int ini_palette_color = -1;

                if (strncasecmp(name, prefix, prefix_len) == 0 && sscanf(name+prefix_len, "%d", &ini_palette_color) == 1) {

                        if (!(ini_palette_color >= 0 && ini_palette_color <= 15)) return 0;

                        byte rgb[3] = {0};

                        if (strcasecmp(value, "default") != 0) {

                                // We want to parse an rgb string with three entries like this: "255, 255, 255"

                                char* start = (char*) value;

                                char* end   = (char*) value;

                                int i;

                                for (i = 0; i < 3 && *end != '\0'; ++i) {

                                        rgb[i] = (byte) strtol(start, &end, 0); // convert this entry into a number 0..255

                                        while (*end == ',' || *end == ' ') {

                                                ++end; // skip delimiter characters or whitespace

                                        }

                                        start = end; // start parsing the next entry here

                                }

                        }

                        rgb_type* palette_color = &vga_palette[ini_palette_color];

                        palette_color->r = rgb[0] / 4; // the palette uses values 0..63, not 0..255

                        palette_color->g = rgb[1] / 4;

                        palette_color->b = rgb[2] / 4;

                        return 1;

                }

                process_word("first_level", &first_level, NULL);

                process_boolean("skip_title", &skip_title);

                process_word("shift_L_allowed_until_level", &shift_L_allowed_until_level, NULL);

                process_word("shift_L_reduced_minutes", &shift_L_reduced_minutes, NULL);

                process_word("shift_L_reduced_ticks", &shift_L_reduced_ticks, NULL);

        } // end of section [CustomGameplay]

        // [Level 1], etc.

        int ini_level = -1;

        if (strncasecmp(section, "Level ", 6) == 0 && sscanf(section+6, "%d", &ini_level) == 1) {

                if (ini_level >= 0 && ini_level <= 15) {

                        // TODO: And maybe allow new types in addition to the existing ones.

                        process_byte("level_type", &tbl_level_type[ini_level], &level_type_names_list);

                        process_word("level_color", &tbl_level_color[ini_level], NULL);

                        process_short("guard_type", &tbl_guard_type[ini_level], &guard_type_names_list);

                        process_byte("guard_hp", &tbl_guard_hp[ini_level], NULL);

                        byte cutscene_index = 0xFF;

                        if (ini_process_byte(name, value, "cutscene", &cutscene_index, NULL) == 1) {

                                if (cutscene_index < COUNT(tbl_cutscenes_lookup)) {

                                        tbl_cutscenes_by_index[ini_level] = cutscene_index;

                                        tbl_cutscenes[ini_level] = tbl_cutscenes_lookup[cutscene_index];

                                }

                                return 1;

                        }

                } else {

                        // TODO: warning?

                }

        }

        return 0;

}

// Callback for a mod-specific INI configuration (that may overrule SDLPoP.ini for SOME but not all options):

static int mod_ini_callback(const char *section, const char *name, const char *value) {

        if (check_ini_section("Enhancements") || check_ini_section("CustomGameplay") ||

                strncasecmp(section, "Level ", 6) == 0 ||

                strcasecmp(name, "enable_copyprot") == 0 ||

                strcasecmp(name, "enable_quicksave") == 0 ||

                strcasecmp(name, "enable_quicksave_penalty") == 0

        ) {

                global_ini_callback(section, name, value);

        }

        return 0;

}

void load_global_options() {

        ini_load(locate_file("game.ini"), global_ini_callback); // global configuration

}

void check_mod_param() {

        // The 'mod' command line argument can override the levelset choice in SDLPoP.ini

        // usage: prince mod "Mod Name"

        const char* mod_param = check_param("mod");

        if (mod_param != NULL) {

                use_custom_levelset = true;

                memset(levelset_name, 0, sizeof(levelset_name));

                strncpy(levelset_name, mod_param, sizeof(levelset_name));

        }

}

void load_mod_options() {

        // load mod-specific INI configuration

        if (use_custom_levelset) {

                char filename[POP_MAX_PATH];

                snprintf(filename, sizeof(filename), "mods/%s/%s", levelset_name, "mod.ini");

                ini_load(filename, mod_ini_callback);

        }

        if (!use_fixes_and_enhancements) disable_fixes_and_enhancements();

}

void show_use_fixes_and_enhancements_prompt() {

        if (use_fixes_and_enhancements != 2) return;

        draw_rect(&screen_rect, 0);

        show_text(&screen_rect, 0, 0,

                "\n"

                "Enable bug fixes and\n"

                "gameplay enhancements?\n"

                "\n"

                "NOTE:\n"

                "This option disables some game quirks.\n"

                "Certain tricks will no longer work by default.\n"

                "\n"

                "\n"

                "Y:  enhanced behavior \n"

                "N:  original behavior    \n"

                "\n"

                "Y / N ?\n"

                "\n"

                "\n"

                "\n"

                "You can fine-tune your preferences\n"

                "and/or bypass this screen by editing the file\n"

                "'SDLPoP.ini'"

        );

        while (use_fixes_and_enhancements == 2 ) {

                idle();

                switch (key_test_quit()) {

                        case SDL_SCANCODE_Y:

                                use_fixes_and_enhancements = 1;

                                printf("Enabling game fixes and enhancements.\n");

                                break;

                        case SDL_SCANCODE_N:

                                use_fixes_and_enhancements = 0;

                                printf("Disabling game fixes and enhancements.\n");

                                break;

                }

        }

        if (!use_fixes_and_enhancements) disable_fixes_and_enhancements();

}