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gamemap.cc
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gamemap.cc
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/**
** Gamemap.cc - X-windows Ultima7 map browser.
**/
/*
*
* Copyright (C) 1998-1999 Jeffrey S. Freedman
* Copyright (C) 2000-2022 The Exult Team
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "gamemap.h"
#include "Flex.h"
#include "actors.h" /* For Dead_body, which should be moved. */
#include "animate.h"
#include "barge.h"
#include "chunks.h"
#include "databuf.h"
#include "effects.h"
#include "egg.h"
#include "exceptions.h"
#include "fnames.h"
#include "game.h"
#include "gamewin.h" /* With some work, could get rid of this. */
#include "ios_state.hpp"
#include "jawbone.h"
#include "mappatch.h"
#include "objiter.cc" /* Yes we #include the .cc here on purpose! Please don't "fix" this */
#include "objiter.h"
#include "objs.h"
#include "shapeinf.h"
#include "spellbook.h"
#include "ucsched.h"
#include "virstone.h"
#include "weaponinf.h"
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <iomanip>
#include <memory>
#include <sstream>
using std::cerr;
using std::cout;
using std::endl;
using std::ifstream;
using std::ios;
using std::istream;
using std::istringstream;
using std::ofstream;
using std::ostringstream;
using std::pair;
using std::string;
using std::vector;
vector<Chunk_terrain*>* Game_map::chunk_terrains = nullptr;
std::unique_ptr<std::istream> Game_map::chunks;
bool Game_map::v2_chunks = false;
bool Game_map::read_all_terrain = false;
bool Game_map::chunk_terrains_modified = false;
const int V2_CHUNK_HDR_SIZE = 4 + 4 + 2; // 0xffff, "exlt", vers.
static char v2hdr[]
= {static_cast<char>(0xff),
static_cast<char>(0xff),
static_cast<char>(0xff),
static_cast<char>(0xff),
'e',
'x',
'l',
't',
0,
0};
/*
* Create a chunk.
*/
Map_chunk* Game_map::create_chunk(int cx, int cy) {
objects[cx][cy] = std::make_unique<Map_chunk>(this, cx, cy);
return get_chunk_unsafe(cx, cy);
}
/*
* Read in a terrain chunk.
*/
Chunk_terrain* Game_map::read_terrain(
int chunk_num // Want this one from u7chunks.
) {
const int ntiles = c_tiles_per_chunk * c_tiles_per_chunk;
assert(chunk_num >= 0
&& static_cast<unsigned>(chunk_num) < chunk_terrains->size());
unsigned char buf[ntiles * 3];
if (v2_chunks) {
chunks->seekg(V2_CHUNK_HDR_SIZE + chunk_num * ntiles * 3);
chunks->read(reinterpret_cast<char*>(buf), ntiles * 3);
} else {
chunks->seekg(chunk_num * ntiles * 2);
chunks->read(reinterpret_cast<char*>(buf), ntiles * 2);
}
auto* ter = new Chunk_terrain(&buf[0], v2_chunks);
if (static_cast<unsigned>(chunk_num) >= chunk_terrains->size()) {
chunk_terrains->resize(chunk_num + 1);
}
(*chunk_terrains)[chunk_num] = ter;
return ter;
}
/*
* Create game window.
*/
Game_map::Game_map(int n)
: num(n), didinit(false), map_modified(false), caching_out(0),
map_patches(std::make_unique<Map_patch_collection>()) {}
/*
* Deleting map.
*/
Game_map::~Game_map() {
clear(); // Delete all objects, chunks.
}
/*
* Init. the static data.
*/
void Game_map::init_chunks() {
int num_chunk_terrains;
const bool patch_exists = is_system_path_defined("<PATCH>");
if (patch_exists && U7exists(PATCH_U7CHUNKS)) {
chunks = U7open_in(PATCH_U7CHUNKS);
} else {
try {
chunks = U7open_in(U7CHUNKS);
} catch (const file_exception&) {
if (!Game::is_editing() || // Ok if map-editing.
!patch_exists) { // But only if patch exists.
throw;
}
auto pOchunks
= U7open_out(PATCH_U7CHUNKS); // Create one in 'patch'.
if (!pOchunks) {
throw file_write_exception(PATCH_U7CHUNKS);
}
auto& ochunks = *pOchunks;
ochunks.write(v2hdr, sizeof(v2hdr));
unsigned char buf[16 * 16 * 3]{};
ochunks.write(reinterpret_cast<char*>(buf), sizeof(buf));
pOchunks.reset();
chunks = U7open_in(PATCH_U7CHUNKS);
}
}
char v2buf[V2_CHUNK_HDR_SIZE]; // Check for V2.
chunks->read(v2buf, sizeof(v2buf));
int hdrsize = 0;
int chunksz = c_tiles_per_chunk * c_tiles_per_chunk * 2;
if (memcmp(v2hdr, v2buf, sizeof(v2buf)) == 0) {
v2_chunks = true;
hdrsize = V2_CHUNK_HDR_SIZE;
chunksz = c_tiles_per_chunk * c_tiles_per_chunk * 3;
}
// Get to end so we can get length.
chunks->seekg(0, ios::end);
// 2 bytes/tile.
num_chunk_terrains
= (static_cast<int>(chunks->tellg()) - hdrsize) / chunksz;
if (!chunk_terrains) {
chunk_terrains = new vector<Chunk_terrain*>();
}
// Resize list to hold all.
chunk_terrains->resize(num_chunk_terrains);
read_all_terrain = false;
}
/*
* Initialize for new/restored game.
*/
void Game_map::init() {
char fname[128];
if (num == 0) {
init_chunks();
}
map_modified = false;
std::unique_ptr<std::istream> pU7map; // Read in map.
bool nomap = false;
if (is_system_path_defined("<PATCH>")
&& U7exists(get_mapped_name(PATCH_U7MAP, fname))) {
pU7map = U7open_in(fname);
} else {
try {
pU7map = U7open_in(get_mapped_name(U7MAP, fname));
} catch (const file_exception& /*f*/) {
if (!Game::is_editing()) { // Ok if map-editing.
cerr << "Map file '" << fname << "' not found." << endl;
}
nomap = true;
}
}
if (!pU7map) {
nomap = true;
}
for (int schunk = 0; schunk < c_num_schunks * c_num_schunks; schunk++) {
// Read in the chunk #'s.
unsigned char buf[16 * 16 * 2];
if (nomap) {
std::fill(std::begin(buf), std::end(buf), 0);
} else {
pU7map->read(reinterpret_cast<char*>(buf), sizeof(buf));
}
const int scy = 16 * (schunk / 12); // Get abs. chunk coords.
const int scx = 16 * (schunk % 12);
const uint8* mapdata = buf;
// Go through chunks.
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 16; cx++) {
terrain_map[scx + cx][scy + cy] = little_endian::Read2(mapdata);
}
}
}
// Clear object lists, flags.
for (auto& row : objects) {
for (auto& obj : row) {
obj.reset();
}
}
std::fill(std::begin(schunk_read), std::end(schunk_read), false);
std::fill(std::begin(schunk_modified), std::end(schunk_modified), false);
std::fill(std::begin(schunk_cache), std::end(schunk_cache), nullptr);
std::fill(std::begin(schunk_cache_sizes), std::end(schunk_cache_sizes), -1);
didinit = true;
}
/*
* Clear the static data.
*/
void Game_map::clear_chunks() {
if (chunk_terrains) {
const int cnt = chunk_terrains->size();
for (int i = 0; i < cnt; i++) {
delete (*chunk_terrains)[i];
}
delete chunk_terrains;
chunk_terrains = nullptr;
}
chunks.reset(); // Close 'u7chunks'.
read_all_terrain = false;
}
/*
* Clear out world's contents. Should be used during a 'restore'.
*/
void Game_map::clear() {
if (num == 0) {
clear_chunks();
}
if (didinit) {
// Delete all chunks (& their objs).
for (auto* i : schunk_cache) {
delete[] i;
}
}
for (auto& row : objects) {
for (auto& obj : row) {
obj.reset();
}
}
didinit = false;
map_modified = false;
// Clear 'read' flags.
std::fill(std::begin(schunk_read), std::end(schunk_read), false);
std::fill(std::begin(schunk_modified), std::end(schunk_modified), false);
std::fill(std::begin(schunk_cache), std::end(schunk_cache), nullptr);
std::fill(std::begin(schunk_cache_sizes), std::end(schunk_cache_sizes), -1);
}
/*
* Read in superchunk data to cover the screen.
*/
void Game_map::read_map_data() {
Game_window* gwin = Game_window::get_instance();
const int scrolltx = gwin->get_scrolltx();
const int scrollty = gwin->get_scrollty();
const int w = gwin->get_width();
const int h = gwin->get_height();
// Start one tile to left.
const int firstsx = (scrolltx - 1) / c_tiles_per_schunk;
const int firstsy = (scrollty - 1) / c_tiles_per_schunk;
// End 8 tiles to right.
// These 1 added to the chunk limits reflect the Game_render::paint_map
// 1 added to the chunk limits for the Smooth Scrolling.
// This prevents a crash in the Edit Terrain mode when jumping
// to a chunk near a superchunk boundary.
const int lastsx = (1
+ (scrolltx + (w + c_tilesize - 2) / c_tilesize
+ c_tiles_per_chunk / 2)
/ c_tiles_per_chunk)
/ c_chunks_per_schunk;
const int lastsy = (1
+ (scrollty + (h + c_tilesize - 2) / c_tilesize
+ c_tiles_per_chunk / 2)
/ c_tiles_per_chunk)
/ c_chunks_per_schunk;
// Watch for wrapping.
const int stopsx = (lastsx + 1) % c_num_schunks;
const int stopsy = (lastsy + 1) % c_num_schunks;
// Read in "map", "ifix" objects for
// all visible superchunks.
for (int sy = firstsy; sy != stopsy; sy = (sy + 1) % c_num_schunks) {
for (int sx = firstsx; sx != stopsx; sx = (sx + 1) % c_num_schunks) {
// Figure superchunk #.
const int schunk = 12 * sy + sx;
// Read it if necessary.
if (!schunk_read[schunk]) {
get_superchunk_objects(schunk);
}
}
}
}
/*
* Get the map objects and scenery for a superchunk.
*/
void Game_map::get_map_objects(int schunk // Superchunk # (0-143).
) {
const int scy = 16 * (schunk / 12); // Get abs. chunk coords.
const int scx = 16 * (schunk % 12);
// Go through chunks.
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 16; cx++) {
get_chunk_objects(scx + cx, scy + cy);
}
}
}
/*
* Read in terrain graphics data into window's image. (May also be
* called during map-editing if the chunknum changes.)
*/
void Game_map::get_chunk_objects(
int cx, int cy // Chunk index within map.
) {
// Get list we'll store into.
Map_chunk* chunk = get_chunk(cx, cy);
const int chunk_num = terrain_map[cx][cy];
Chunk_terrain* ter = get_terrain(chunk_num);
chunk->set_terrain(ter);
}
/*
* Read in all terrain chunks (for editing).
*/
void Game_map::get_all_terrain() {
if (read_all_terrain) {
return; // Already done.
}
const int num_chunk_terrains = chunk_terrains->size();
for (int i = 0; i < num_chunk_terrains; i++) {
if (!(*chunk_terrains)[i]) {
read_terrain(i);
}
}
read_all_terrain = true;
}
/*
* Set a chunk to a new terrain (during map-editing).
*/
void Game_map::set_chunk_terrain(
int cx, int cy, // Coords. of chunk to change.
int chunknum // New chunk #.
) {
terrain_map[cx][cy] = chunknum; // Set map.
get_chunk_objects(cx, cy); // Set chunk to it.
map_modified = true;
}
/*
* Build a file name with the map directory before it; ie,
* get_mapped_name("<GAMEDAT>/ireg, 3, to) will store
* "<GAMEDAT>/map03/ireg".
*/
char* Game_map::get_mapped_name(const char* from, char* to) {
return Get_mapped_name(from, num, to);
}
/*
* Get the name of an ireg or ifix file.
*
* Output: ->fname, where name is stored.
*/
char* Game_map::get_schunk_file_name(
const char* prefix, // "ireg" or "ifix".
int schunk, // Superchunk # (0-143).
char* fname // Name is stored here.
) {
get_mapped_name(prefix, fname);
const int len = strlen(fname);
constexpr static const char hexLUT[] = "0123456789abcdef";
fname[len] = hexLUT[schunk / 16];
fname[len + 1] = hexLUT[schunk % 16];
fname[len + 2] = 0;
return fname;
}
/*
* Have shapes been added?
*/
static bool New_shapes() {
const int u7nshapes = GAME_SI ? 1036 : 1024;
const int nshapes
= Shape_manager::get_instance()->get_shapes().get_num_shapes();
return nshapes > u7nshapes;
}
/*
* Write out the chunks descriptions.
*/
void Game_map::write_chunk_terrains() {
const int ntiles = c_tiles_per_chunk * c_tiles_per_chunk;
const int cnt = chunk_terrains->size();
int i; // Any terrains modified?
for (i = 0; i < cnt; i++) {
if ((*chunk_terrains)[i] && (*chunk_terrains)[i]->is_modified()) {
break;
}
}
if (i < cnt) { // Got to update.
get_all_terrain(); // IMPORTANT: Get all in memory.
// Open file for chunks data.
// This truncates the file.
auto pOchunks = U7open_out(PATCH_U7CHUNKS);
if (!pOchunks) {
throw file_write_exception(U7CHUNKS);
}
auto& ochunks = *pOchunks;
v2_chunks = New_shapes();
const int nbytes = v2_chunks ? 3 : 2;
if (v2_chunks) {
ochunks.write(v2hdr, sizeof(v2hdr));
}
for (i = 0; i < cnt; i++) {
Chunk_terrain* ter = (*chunk_terrains)[i];
unsigned char data[ntiles * 3];
if (ter) {
ter->write_flats(data, v2_chunks);
ter->set_modified(false);
} else {
std::fill_n(data, ntiles * nbytes, 0);
cerr << "nullptr terrain. U7chunks may be bad." << endl;
}
ochunks.write(reinterpret_cast<char*>(data), ntiles * nbytes);
}
if (!ochunks.good()) {
throw file_write_exception(U7CHUNKS);
}
}
chunk_terrains_modified = false;
}
/*
* Write out the 'static' map files.
*/
void Game_map::write_static() {
char fname[128];
U7mkdir("<PATCH>", 0755); // Create dir if not already there.
// Don't use PATCHDAT define cause
// it has a trailing slash
int schunk; // Write each superchunk to 'static'.
for (schunk = 0; schunk < c_num_schunks * c_num_schunks; schunk++) {
// Only write what we've modified.
if (schunk_modified[schunk]) {
write_ifix_objects(schunk);
}
}
if (chunk_terrains_modified) {
write_chunk_terrains();
}
// Write out map.
auto pU7map = U7open_out(get_mapped_name(PATCH_U7MAP, fname));
if (!pU7map) {
throw file_write_exception(U7MAP);
}
auto& u7map = *pU7map;
for (schunk = 0; schunk < c_num_schunks * c_num_schunks; schunk++) {
const int scy = 16 * (schunk / 12); // Get abs. chunk coords.
const int scx = 16 * (schunk % 12);
uint8 buf[16 * 16 * 2];
uint8* mapdata = buf;
// Go through chunks.
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 16; cx++) {
little_endian::Write2(mapdata, terrain_map[scx + cx][scy + cy]);
}
}
u7map.write(reinterpret_cast<char*>(buf), sizeof(buf));
}
if (!u7map.good()) {
throw file_write_exception(U7MAP);
}
map_modified = false;
}
/*
* Write out one of the "u7ifix" files.
*
* Output: Errors reported.
*/
void Game_map::write_ifix_objects(int schunk // Superchunk # (0-143).
) {
char fname[128]; // Set up name.
OFileDataSource ifix(get_schunk_file_name(PATCH_U7IFIX, schunk, fname));
// +++++Use game title.
const int count = c_chunks_per_schunk * c_chunks_per_schunk;
const Flex_header::Flex_vers vers
= !New_shapes() ? Flex_header::orig : Flex_header::exult_v2;
bool v2 = vers == Flex_header::exult_v2;
Flex_writer writer(ifix, "Exult", count, vers);
const int scy = 16 * (schunk / 12); // Get abs. chunk coords.
const int scx = 16 * (schunk % 12);
// Go through chunks.
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 16; cx++) {
writer.write_object(get_chunk(scx + cx, scy + cy), v2);
}
}
schunk_modified[schunk] = false;
}
/*
* Read in the objects for a superchunk from one of the "u7ifix" files.
*/
void Game_map::get_ifix_objects(int schunk // Superchunk # (0-143).
) {
char fname[128]; // Set up name.
if (!is_system_path_defined("<PATCH>") ||
// First check for patch.
!U7exists(get_schunk_file_name(PATCH_U7IFIX, schunk, fname))) {
get_schunk_file_name(U7IFIX, schunk, fname);
}
IFileDataSource ifix(fname);
if (!ifix.good()) {
if (!Game::is_editing()) { // Ok if map-editing.
cerr << "Ifix file '" << fname << "' not found." << endl;
}
return;
}
FlexFile flex(fname);
const int vers = static_cast<int>(flex.get_vers());
const int scy = 16 * (schunk / 12); // Get abs. chunk coords.
const int scx = 16 * (schunk % 12);
// Go through chunks.
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 16; cx++) {
// Get to index entry for chunk.
const int chunk_num = cy * 16 + cx;
size_t len;
const uint32 offset = flex.get_entry_info(chunk_num, len);
if (len) {
get_ifix_chunk_objects(
&ifix, vers, offset, len, scx + cx, scy + cy);
}
}
}
}
/*
* Get the objects from one ifix chunk entry onto the screen.
*/
void Game_map::get_ifix_chunk_objects(
IDataSource* ifix,
int vers, // Flex file vers.
long filepos, // Offset in file.
int len, // Length of data.
int cx, int cy // Absolute chunk #'s.
) {
Game_object_shared obj;
ifix->seek(filepos); // Get to actual shape.
// Get buffer to hold entries' indices.
auto entries = ifix->readN(len); // Read them in.
unsigned char* ent = entries.get();
// Get object list for chunk.
Map_chunk* olist = get_chunk(cx, cy);
if (static_cast<Flex_header::Flex_vers>(vers) == Flex_header::orig) {
const int cnt = len / 4;
for (int i = 0; i < cnt; i++, ent += 4) {
int tx = (ent[0] >> 4) & 0xf;
int ty = ent[0] & 0xf;
int tz = ent[1] & 0xf;
int shnum = ent[2] + 256 * (ent[3] & 3);
int frnum = ent[3] >> 2;
const Shape_info& info = ShapeID::get_info(shnum);
obj = (info.is_animated() || info.has_sfx())
? std::make_shared<Animated_ifix_object>(
shnum, frnum, tx, ty, tz)
: std::make_shared<Ifix_game_object>(
shnum, frnum, tx, ty, tz);
olist->add(obj.get());
}
} else if (
static_cast<Flex_header::Flex_vers>(vers)
== Flex_header::exult_v2) {
// b0 = tx,ty, b1 = lift, b2-3 = shnum, b4=frnum
const int cnt = len / 5;
for (int i = 0; i < cnt; i++, ent += 5) {
int tx = (ent[0] >> 4) & 0xf;
int ty = ent[0] & 0xf;
int tz = ent[1] & 0xf;
int shnum = ent[2] + 256 * ent[3];
int frnum = ent[4];
const Shape_info& info = ShapeID::get_info(shnum);
obj = (info.is_animated() || info.has_sfx())
? std::make_shared<Animated_ifix_object>(
shnum, frnum, tx, ty, tz)
: std::make_shared<Ifix_game_object>(
shnum, frnum, tx, ty, tz);
olist->add(obj.get());
}
} else {
assert(0);
}
olist->setup_dungeon_levels(); // Should have all dungeon pieces now.
}
/*
* Constants for IREG files:
*/
#define IREG_SPECIAL 255 // Precedes special entries.
#define IREG_UCSCRIPT 1 // Saved Usecode_script for object.
#define IREG_ENDMARK 2 // Just an 'end' mark.
#define IREG_ATTS 3 // Attribute/value pairs.
#define IREG_STRING 4 // A string; ie, function name.
/*
* Write out attributes for an object.
*/
void Game_map::write_attributes(
ODataSource* ireg, vector<pair<const char*, int>>& attlist) {
int len = 0; // Figure total length.
int i;
const int cnt = attlist.size();
if (!cnt) {
return;
}
for (i = 0; i < cnt; ++i) {
const char* att = attlist[i].first;
len += strlen(att) + 1 + 2; // Name, nullptr, val.
}
ireg->write1(IREG_SPECIAL);
ireg->write1(IREG_ATTS);
ireg->write2(len);
for (i = 0; i < cnt; ++i) {
const char* att = attlist[i].first;
const int val = attlist[i].second;
ireg->write(att, strlen(att) + 1);
ireg->write2(val);
}
}
/*
* Write out scheduled usecode for an object.
*/
void Game_map::write_scheduled(
ODataSource* ireg, Game_object* obj,
bool write_mark // Write an IREG_ENDMARK if true.
) {
for (Usecode_script* scr = Usecode_script::find(obj); scr;
scr = Usecode_script::find(obj, scr)) {
ostringstream outbuf(ios::out);
OStreamDataSource nbuf(&outbuf);
const int len = scr->save(&nbuf);
if (len < 0) {
cerr << "Error saving Usecode script" << endl;
} else if (len > 0) {
ireg->write1(IREG_SPECIAL);
ireg->write1(IREG_UCSCRIPT);
ireg->write2(len); // Store length.
ireg->write(outbuf.str());
}
}
if (write_mark) {
ireg->write1(IREG_SPECIAL);
ireg->write1(IREG_ENDMARK);
}
}
/*
* Write string entry and/or return length of what's written.
*/
int Game_map::write_string(
ODataSource* ireg, // Null if we just want length.
const char* str) {
const int len = 1 + strlen(str);
if (ireg) {
ireg->write1(IREG_SPECIAL);
ireg->write1(IREG_STRING);
ireg->write2(len);
ireg->write(str, len);
}
return len + 4;
}
/*
* Write modified 'u7ireg' files.
*/
void Game_map::write_ireg() {
// Write each superchunk to Iregxx.
for (int schunk = 0; schunk < c_num_schunks * c_num_schunks; schunk++) {
// Only write what we've read.
if (schunk_cache[schunk] && schunk_cache_sizes[schunk] >= 0) {
// It's loaded in a memory buffer
char fname[128]; // Set up name.
auto ireg_stream
= U7open_out(get_schunk_file_name(U7IREG, schunk, fname));
if (ireg_stream) {
ireg_stream->write(
schunk_cache[schunk], schunk_cache_sizes[schunk]);
}
} else if (schunk_read[schunk]) {
// It's active
write_ireg_objects(schunk);
}
}
}
/*
* Write out one of the "u7ireg" files.
*
* Output: 0 if error, which is reported.
*/
void Game_map::write_ireg_objects(int schunk // Superchunk # (0-143).
) {
char fname[128]; // Set up name.
OFileDataSource ireg(get_schunk_file_name(U7IREG, schunk, fname));
write_ireg_objects(schunk, &ireg);
ireg.flush();
}
/*
* Write out one of the "u7ireg" files.
*
* Output: 0 if error, which is reported.
*/
void Game_map::write_ireg_objects(
int schunk, // Superchunk # (0-143).
ODataSource* ireg) {
const int scy = 16 * (schunk / 12); // Get abs. chunk coords.
const int scx = 16 * (schunk % 12);
// Go through chunks.
for (int cy = 0; cy < 16; cy++) {
for (int cx = 0; cx < 16; cx++) {
Map_chunk* chunk = get_chunk(scx + cx, scy + cy);
Game_object* obj;
// Restore original order (sort of).
Object_iterator_backwards next(chunk);
while ((obj = next.get_next()) != nullptr) {
obj->write_ireg(ireg);
}
ireg->write2(0); // End with 2 0's.
}
}
}
/*
* Read in the objects for a superchunk from one of the "u7ireg" files.
* (These are the moveable objects.)
*/
void Game_map::get_ireg_objects(int schunk // Superchunk # (0-143).
) {
char fname[128]; // Set up name.
std::unique_ptr<IDataSource> ireg;
if (schunk_cache[schunk] && schunk_cache_sizes[schunk] >= 0) {
// No items
if (schunk_cache_sizes[schunk] == 0) {
return;
}
ireg = std::make_unique<IBufferDataView>(
schunk_cache[schunk], schunk_cache_sizes[schunk]);
#ifdef DEBUG
std::cout << "Reading " << get_schunk_file_name(U7IREG, schunk, fname)
<< " from memory" << std::endl;
#endif
} else {
ireg = std::make_unique<IFileDataSource>(
get_schunk_file_name(U7IREG, schunk, fname));
if (!ireg->good()) {
return; // Just don't show them.
}
}
const int scy = 16 * (schunk / 12); // Get abs. chunk coords.
const int scx = 16 * (schunk % 12);
read_ireg_objects(ireg.get(), scx, scy);
// A fixup:
if (schunk == 10 * 12 + 11 && Game::get_game_type() == SERPENT_ISLE) {
// Lever in SilverSeed:
Game_object_vector vec;
if (Game_object::find_nearby(
vec, Tile_coord(2936, 2726, 0), 787, 0, 0, c_any_qual, 5)) {
vec[0]->move(2937, 2727, 2);
}
}
if (schunk_cache[schunk]) {
delete[] schunk_cache[schunk];
schunk_cache[schunk] = nullptr;
schunk_cache_sizes[schunk] = -1;
}
}
/*
* Read in a 'special' IREG entry (one starting with 255).
*/
void Read_special_ireg(
IDataSource* ireg,
Game_object* obj // Last object read.
) {
const int type = ireg->read1(); // Get type.
const int len = ireg->read2(); // Length of rest.
auto data = ireg->readN(len);
if (!obj) {
// Something went wrong if we get here, but still.
// Just return discarding the data read.
cerr << "Special IREG entry attached to NULL object!" << endl;
return;
}
auto* buf = data.get();
if (type == IREG_UCSCRIPT) { // Usecode script?
IBufferDataView nbuf(buf, len);
Usecode_script* scr = Usecode_script::restore(obj, &nbuf);
if (scr) {
scr->start(scr->get_delay());
}
} else if (type == IREG_ATTS) { // Attribute/value pairs?
obj->read_attributes(buf, len);
} else if (type == IREG_STRING) { // IE, Usecode egg function name?
if (obj->is_egg()) {
static_cast<Egg_object*>(obj)->set_str1(
reinterpret_cast<char*>(buf));
}
} else {
cerr << "Unknown special IREG entry: " << type << endl;
}
}
/*
* Read in a 'special' IREG entry (one starting with 255).
*/
void Game_map::read_special_ireg(
IDataSource* ireg,
Game_object* obj // Last object read.
) {
while (ireg->peek() == IREG_SPECIAL && !ireg->eof()) {
ireg->read1(); // Eat the IREG_SPECIAL.
const unsigned char type = ireg->peek();
if (type == IREG_ENDMARK) {
// End of list.
ireg->read1();
return;
}
Read_special_ireg(ireg, obj);
}
}
/*
* Containers and items classed as 'quality_flags' have a byte of flags.
* This routine returns them converted into Object_flags.
*/
inline unsigned long Get_quality_flags(
unsigned char qualbyte // Quality byte containing flags.
) {
return ((qualbyte & 1) << Obj_flags::invisible)
| (((qualbyte >> 3) & 1) << Obj_flags::okay_to_take);
}
/*
* Read a list of ireg objects. They are either placed in the desired
* game chunk, or added to their container.
*/
void Game_map::read_ireg_objects(
IDataSource* ireg, // File to read from.
int scx, int scy, // Abs. chunk coords. of superchunk.
Game_object* container, // Container, or null.
unsigned long flags // Usecode item flags.
) {
unsigned char entbuf[20];
int entlen; // Gets entry length.
sint8 index_id = -1;
Game_object* last_obj = nullptr; // Last one read in this call.
Game_window* gwin = Game_window::get_instance();
// Go through entries.
for (entlen = ireg->read1(); !ireg->eof(); entlen = ireg->read1()) {
int extended = 0; // 1 for 2-byte shape #'s.
bool extended_lift = false;
// Skip 0's & ends of containers.
if (!entlen || entlen == 1) {
if (container) {
return; // Skip 0's & ends of containers.
} else {
continue;
}
}
// Detect the 2 byte index id
else if (entlen == 2) {
index_id = static_cast<sint8>(ireg->read2());
continue;
} else if (entlen == IREG_SPECIAL) {
Read_special_ireg(ireg, last_obj);
continue;
} else if (entlen == IREG_EXTENDED || entlen == IREG_EXTENDED2) {
if (entlen == IREG_EXTENDED) {
extended = 1;
}
extended_lift = true;
entlen = ireg->read1();
}
// Get copy of flags.
unsigned long oflags = flags & ~(1 << Obj_flags::is_temporary);
const int testlen = entlen - extended;
if (testlen != 6 && testlen != 10 && testlen != 12 && testlen != 13
&& testlen != 14 && testlen != 18) {
const long pos = ireg->getPos();
cout << "Unknown entlen " << testlen << " at pos. " << pos << endl;
ireg->seek(pos + entlen);
continue; // Only know these two types.
}
unsigned char* entry = &entbuf[0]; // Get entry.
ireg->read(reinterpret_cast<char*>(entry), entlen);
const int cx = entry[0] >> 4; // Get chunk indices within schunk.
const int cy = entry[1] >> 4;
// Get coord. #'s where shape goes.
int tilex;
int tiley;
if (container) { // In container? Get gump coords.
tilex = entry[0];
tiley = entry[1];
} else {
tilex = entry[0] & 0xf;
tiley = entry[1] & 0xf;
}
int shnum;
int frnum; // Get shape #, frame #.
if (extended) {
shnum = entry[2] + 256 * entry[3];
frnum = entry[4];
++entry; // So the rest is in the right place.
} else {
shnum = entry[2] + 256 * (entry[3] & 3);