mirror of
https://github.com/libretro/scummvm.git
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284 lines
6.3 KiB
C++
284 lines
6.3 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2005 The ScummVM project
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*
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* The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*
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*/
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// Isometric level module
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#include "saga/saga.h"
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#include "saga/gfx.h"
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#include "saga/isomap.h"
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#include "saga/stream.h"
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namespace Saga {
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IsoMap::IsoMap(Gfx *gfx) {
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_gfx = gfx;
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_init = 1;
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_tiles_loaded = 0;
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}
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int IsoMap::loadTileset(const byte *tileres_p, size_t tileres_len) {
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ISOTILE_ENTRY first_entry;
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ISOTILE_ENTRY *tile_tbl;
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uint16 i;
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assert((_init) && (!_tiles_loaded));
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assert((tileres_p != NULL) && (tileres_len > 0));
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MemoryReadStreamEndian readS(tileres_p, tileres_len, IS_BIG_ENDIAN);
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readS.readUint16(); // skip
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first_entry.tile_offset = readS.readUint16();
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_tile_ct = first_entry.tile_offset / SAGA_ISOTILE_ENTRY_LEN;
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readS.seek(0);
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tile_tbl = (ISOTILE_ENTRY *)malloc(_tile_ct * sizeof *tile_tbl);
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if (tile_tbl == NULL) {
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return MEM;
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}
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for (i = 0; i < _tile_ct; i++) {
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tile_tbl[i].tile_h = readS.readByte();
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tile_tbl[i].mask_rule = readS.readByte();
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tile_tbl[i].tile_offset = readS.readUint16();
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tile_tbl[i].terrain_mask = readS.readSint16();
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tile_tbl[i].mask = readS.readSint16();
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}
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_tiles_loaded = 1;
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_tile_tbl = tile_tbl;
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_tileres_p = tileres_p;
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_tileres_len = tileres_len;
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return SUCCESS;
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}
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int IsoMap::loadMetaTileset(const byte *mtileres_p, size_t mtileres_len) {
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ISO_METATILE_ENTRY *mtile_tbl;
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uint16 mtile_ct;
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uint16 ct;
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int i;
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assert(_init);
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assert((mtileres_p != NULL) && (mtileres_len > 0));
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MemoryReadStreamEndian readS(mtileres_p, mtileres_len, IS_BIG_ENDIAN);
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mtile_ct = mtileres_len / SAGA_METATILE_ENTRY_LEN;
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mtile_tbl = (ISO_METATILE_ENTRY *)malloc(mtile_ct * sizeof *mtile_tbl);
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if (mtile_tbl == NULL) {
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return MEM;
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}
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for (ct = 0; ct < mtile_ct; ct++) {
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mtile_tbl[ct].mtile_n = readS.readUint16();
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mtile_tbl[ct].height = readS.readSint16();
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mtile_tbl[ct].highest_pixel = readS.readSint16();
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mtile_tbl[ct].v_bits = readS.readByte();
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mtile_tbl[ct].u_bits = readS.readByte();
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for (i = 0; i < SAGA_METATILE_SIZE; i++) {
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mtile_tbl[ct].tile_tbl[i] = readS.readUint16();
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}
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}
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_mtile_ct = mtile_ct;
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_mtile_tbl = mtile_tbl;
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_mtileres_p = mtileres_p;
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_mtileres_len = mtileres_len;
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_mtiles_loaded = 1;
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return SUCCESS;
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}
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int IsoMap::loadMetamap(const byte *mm_res_p, size_t mm_res_len) {
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int i;
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MemoryReadStreamEndian readS(mm_res_p, mm_res_len, IS_BIG_ENDIAN);
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_metamap_n = readS.readSint16();
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for (i = 0; i < SAGA_METAMAP_SIZE; i++) {
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_metamap_tbl[i] = readS.readUint16();
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}
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_mm_res_p = mm_res_p;
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_mm_res_len = mm_res_len;
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_metamap_loaded = 1;
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return SUCCESS;
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}
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int IsoMap::draw(SURFACE *dst_s) {
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GAME_DISPLAYINFO disp_info;
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_vm->getDisplayInfo(&disp_info);
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Rect iso_rect(disp_info.logical_w, disp_info.scene_h);
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drawRect(dst_s, &iso_rect, 0);
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drawMetamap(dst_s, -1000, -500);
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return SUCCESS;
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}
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int IsoMap::drawMetamap(SURFACE *dst_s, int map_x, int map_y) {
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int meta_base_x = map_x;
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int meta_base_y = map_y;
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int meta_xi;
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int meta_yi;
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int meta_x;
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int meta_y;
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int meta_idx;
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for (meta_yi = SAGA_METAMAP_H - 1; meta_yi >= 0; meta_yi--) {
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meta_x = meta_base_x;
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meta_y = meta_base_y;
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for (meta_xi = SAGA_METAMAP_W - 1; meta_xi >= 0; meta_xi--) {
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meta_idx = meta_xi + (meta_yi * 16);
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drawMetaTile(dst_s, _metamap_tbl[meta_idx], meta_x, meta_y);
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meta_x += 128;
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meta_y += 64;
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}
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meta_base_x -= 128;
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meta_base_y += 64;
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}
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return SUCCESS;
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}
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int IsoMap::drawMetaTile(SURFACE *dst_s, uint16 mtile_i, int mtile_x, int mtile_y) {
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int tile_xi;
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int tile_yi;
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int tile_x;
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int tile_y;
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int tile_base_x;
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int tile_base_y;
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int tile_i;
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ISO_METATILE_ENTRY *mtile_p;
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assert(_init && _mtiles_loaded);
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if (mtile_i >= _mtile_ct) {
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return FAILURE;
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}
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mtile_p = &_mtile_tbl[mtile_i];
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tile_base_x = mtile_x;
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tile_base_y = mtile_y;
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for (tile_yi = SAGA_METATILE_H - 1; tile_yi >= 0; tile_yi--) {
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tile_y = tile_base_y;
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tile_x = tile_base_x;
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for (tile_xi = SAGA_METATILE_W - 1; tile_xi >= 0; tile_xi--) {
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tile_i = tile_xi + (tile_yi * SAGA_METATILE_W);
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drawTile(dst_s, mtile_p->tile_tbl[tile_i], tile_x, tile_y);
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tile_x += SAGA_ISOTILE_WIDTH / 2;
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tile_y += SAGA_ISOTILE_BASEHEIGHT / 2 + 1;
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}
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tile_base_x -= SAGA_ISOTILE_WIDTH / 2;
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tile_base_y += SAGA_ISOTILE_BASEHEIGHT / 2 + 1;
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}
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return SUCCESS;
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}
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int IsoMap::drawTile(SURFACE *dst_s, uint16 tile_i, int tile_x, int tile_y) {
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const byte *tile_p;
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const byte *read_p;
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byte *draw_p;
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int draw_x;
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int draw_y;
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int tile_h;
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int w_count = 0;
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int row;
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int bg_runct;
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int fg_runct;
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int ct;
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assert(_init && _tiles_loaded);
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if (tile_i >= _tile_ct) {
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return FAILURE;
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}
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/* temporary x clip */
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if (tile_x < 0) {
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return SUCCESS;
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}
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/* temporary x clip */
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if (tile_x >= 320 - 32) {
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return SUCCESS;
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}
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tile_p = _tileres_p + _tile_tbl[tile_i].tile_offset;
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tile_h = _tile_tbl[tile_i].tile_h;
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read_p = tile_p;
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draw_p = (byte *)dst_s->pixels + tile_x + (tile_y * dst_s->pitch);
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draw_x = tile_x;
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draw_y = tile_y;
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if (tile_h > SAGA_ISOTILE_BASEHEIGHT) {
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draw_y = tile_y - (tile_h - SAGA_ISOTILE_BASEHEIGHT);
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}
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// temporary y clip
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if (draw_y < 0) {
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return SUCCESS;
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}
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for (row = 0; row < tile_h; row++) {
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draw_p = (byte *)dst_s->pixels + draw_x + ((draw_y + row) * dst_s->pitch);
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w_count = 0;
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// temporary y clip
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if ((draw_y + row) >= 137) {
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return SUCCESS;
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}
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for (;;) {
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bg_runct = *read_p++;
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w_count += bg_runct;
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if (w_count >= SAGA_ISOTILE_WIDTH) {
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break;
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}
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draw_p += bg_runct;
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fg_runct = *read_p++;
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w_count += fg_runct;
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for (ct = 0; ct < fg_runct; ct++) {
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*draw_p++ = *read_p++;
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}
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}
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}
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return SUCCESS;
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}
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} // End of namespace Saga
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