mirror of https://github.com/OpenRCT2/OpenRCT2.git
220 lines
6.6 KiB
C
220 lines
6.6 KiB
C
/*****************************************************************************
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* Copyright (c) 2014 Ted John
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* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
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*
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* This file is part of OpenRCT2.
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*
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* OpenRCT2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*****************************************************************************/
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#include <windows.h>
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#include "addresses.h"
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#include "object.h"
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#include "sawyercoding.h"
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#define OBJECT_ENTRY_GROUP_COUNT 11
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#define OBJECT_ENTRY_COUNT 721
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typedef struct {
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uint32 total_files;
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uint32 total_file_size;
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uint32 date_modified_checksum;
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uint32 object_list_size;
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uint32 var_10;
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} rct_plugin_header;
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int object_entry_group_counts[] = {
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128, // rides
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252, // small scenery
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128, // large scenery
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128, // walls
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32, // banners
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16, // paths
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15, // path bits
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19, // scenery sets
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1, // park entrance
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1, // water
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1 // scenario text
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};
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struct { void **data; rct_object_entry_extended *entries; } object_entry_groups[] = {
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(void**)(0x009ACFA4 ), (rct_object_entry_extended*)(0x00F3F03C ), // rides
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(void**)(0x009ACFA4 + (128 * 4)), (rct_object_entry_extended*)(0x00F3F03C + (128 * 20)), // small scenery
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(void**)(0x009ACFA4 + (380 * 4)), (rct_object_entry_extended*)(0x00F3F03C + (380 * 20)), // large scenery
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(void**)(0x009ACFA4 + (508 * 4)), (rct_object_entry_extended*)(0x00F3F03C + (508 * 20)), // walls
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(void**)(0x009ACFA4 + (636 * 4)), (rct_object_entry_extended*)(0x00F3F03C + (636 * 20)), // banners
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(void**)(0x009ACFA4 + (668 * 4)), (rct_object_entry_extended*)(0x00F3F03C + (668 * 20)), // paths
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(void**)(0x009ACFA4 + (684 * 4)), (rct_object_entry_extended*)(0x00F3F03C + (684 * 20)), // path bits
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(void**)(0x009ACFA4 + (699 * 4)), (rct_object_entry_extended*)(0x00F3F03C + (699 * 20)), // scenery sets
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(void**)(0x009ACFA4 + (718 * 4)), (rct_object_entry_extended*)(0x00F3F03C + (718 * 20)), // park entrance
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(void**)(0x009ACFA4 + (719 * 4)), (rct_object_entry_extended*)(0x00F3F03C + (719 * 20)), // water
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(void**)(0x009ACFA4 + (720 * 4)), (rct_object_entry_extended*)(0x00F3F03C + (720 * 20)) // scenario text
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};
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/**
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*
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* rct2: 0x006A93CD
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*/
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static void object_list_examine()
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{
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int i;
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rct_object_entry *object;
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object = RCT2_GLOBAL(RCT2_ADDRESS_INSTALLED_OBJECT_LIST, rct_object_entry*);
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for (i = 0; i < RCT2_GLOBAL(0x00F42B6C, sint32); i++) {
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if (object->flags & 0xF0)
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RCT2_GLOBAL(0x00F42BDA, uint8) |= 1;
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object = object_get_next(object);
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}
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}
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/**
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*
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* rct2: 0x006A8B40
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*/
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void object_list_load()
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{
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HANDLE hFindFile;
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WIN32_FIND_DATAA findFileData;
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int totalFiles = 0, totalFileSize = 0, fileDateModifiedChecksum = 0;
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// Enumerate through each object in the directory
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hFindFile = FindFirstFile(RCT2_ADDRESS(RCT2_ADDRESS_OBJECT_DATA_PATH, char), &findFileData);
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if (hFindFile != INVALID_HANDLE_VALUE) {
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do {
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totalFiles++;
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totalFileSize += findFileData.nFileSizeLow;
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fileDateModifiedChecksum ^=
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findFileData.ftLastWriteTime.dwLowDateTime ^
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findFileData.ftLastWriteTime.dwHighDateTime;
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fileDateModifiedChecksum = ror32(fileDateModifiedChecksum, 5);
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} while (FindNextFile(hFindFile, &findFileData));
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FindClose(hFindFile);
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}
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totalFiles = ror32(totalFiles, 24);
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totalFiles = (totalFiles & ~0xFF) | 1;
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totalFiles = rol32(totalFiles, 24);
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// Read plugin header
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rct_plugin_header pluginHeader;
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FILE *file = fopen(get_file_path(PATH_ID_PLUGIN), "rb");
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if (file != NULL) {
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if (fread(&pluginHeader, sizeof(pluginHeader), 1, file) == 1) {
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// Check if object repository has changed in anyway
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if (
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totalFiles == pluginHeader.total_files &&
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totalFileSize == pluginHeader.total_file_size &&
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fileDateModifiedChecksum == pluginHeader.date_modified_checksum
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) {
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// Dispose installed object list
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if (RCT2_GLOBAL(RCT2_ADDRESS_INSTALLED_OBJECT_LIST, sint32) != -1) {
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rct2_free(RCT2_GLOBAL(RCT2_ADDRESS_INSTALLED_OBJECT_LIST, void*));
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RCT2_GLOBAL(RCT2_ADDRESS_INSTALLED_OBJECT_LIST, sint32) = -1;
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}
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// Read installed object list
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RCT2_GLOBAL(RCT2_ADDRESS_INSTALLED_OBJECT_LIST, void*) = rct2_malloc(pluginHeader.object_list_size);
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if (fread(RCT2_GLOBAL(RCT2_ADDRESS_INSTALLED_OBJECT_LIST, void*), pluginHeader.object_list_size, 1, file) == 1) {
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RCT2_GLOBAL(0x00F42B6C, uint32) = pluginHeader.var_10;
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fclose(file);
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RCT2_CALLPROC_EBPSAFE(0x006A9FC0);
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object_list_examine();
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return;
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}
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}
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}
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fclose(file);
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}
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// Reload object list
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RCT2_GLOBAL(0x00F42B94, uint32) = totalFiles;
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RCT2_GLOBAL(0x00F42B98, uint32) = totalFileSize;
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RCT2_GLOBAL(0x00F42B9C, uint32) = fileDateModifiedChecksum;
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RCT2_CALLPROC_EBPSAFE(0x006A8D8F);
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}
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static int check_object_entry(rct_object_entry *entry)
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{
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uint32 *dwords = (uint32*)entry;
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return (0xFFFFFFFF & dwords[0] & dwords[1] & dwords[2] & dwords[3]) + 1 != 0;
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}
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/**
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*
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* rct2: 0x006AA0C6
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*/
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void object_read_and_load_entries(FILE *file)
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{
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object_unload_all();
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int i, j;
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rct_object_entry *entries;
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// Read all the object entries
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entries = malloc(OBJECT_ENTRY_COUNT * sizeof(rct_object_entry));
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sawyercoding_read_chunk(file, (uint8*)entries);
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// Load each object
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for (i = 0; i < OBJECT_ENTRY_COUNT; i++) {
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if (!check_object_entry(&entries[i]))
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continue;
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// Get entry group index
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int entryGroupIndex = i;
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for (j = 0; j < countof(object_entry_group_counts); j++) {
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if (entryGroupIndex < object_entry_group_counts[j])
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break;
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entryGroupIndex -= object_entry_group_counts[j];
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}
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// Load the obect
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if (!object_load(entryGroupIndex, &entries[i])) {
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// Failed to load the object
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free(entries);
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object_unload_all();
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return;
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}
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}
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free(entries);
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}
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/**
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*
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* rct2: 0x006AA2B7
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*/
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int object_load_packed()
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{
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int eax, ebx, ecx, edx, esi, edi, ebp;
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RCT2_CALLFUNC_X(0x006AA2B7, &eax, &ebx, &ecx, &edx, &esi, &edi, &ebp);
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return eax;
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}
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/**
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*
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* rct2: 0x006A9CE8
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*/
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void object_unload_all()
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{
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int i, j;
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for (i = 0; i < OBJECT_ENTRY_GROUP_COUNT; i++)
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for (j = 0; j < object_entry_group_counts[i]; j++)
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if (object_entry_groups[i].data[j] != (void**)0xFFFFFFFF)
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object_unload(j, &object_entry_groups[i].entries[j]);
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} |