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/* ScummVM - Scumm Interpreter
 * Copyright (C) 2004 The ScummVM project
 *
 * The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
 *
 * 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.
 *
 * $Header$
 *
 */

/* Action map module */

#include "reinherit.h"

#include "yslib.h"

#include "cvar_mod.h"
#include "console_mod.h"
#include "gfx_mod.h"

#include "actionmap_mod.h"
#include "actionmap.h"

namespace Saga {
	static R_ACTIONMAP_INFO ActmapModule;

	int ACTIONMAP_Register(void) {
		CVAR_RegisterFunc(CF_action_info,
			"action_info", NULL, R_CVAR_NONE, 0, 0);
		return R_SUCCESS;
	}

	int ACTIONMAP_Init(void) {
		R_printf(R_STDOUT, "ACTIONMAP Module: Initializing...\n");
		ActmapModule.init = 1;
		return R_SUCCESS;
	}

	int ACTIONMAP_Load(const byte * exmap_res, size_t exmap_res_len) {
		//Loads exit map data from specified exit map resource
		R_ACTIONMAP_ENTRY *exmap_entry;
		R_POINT *exmap_pt_tbl;

		int exit_ct;
		int i, pt;

		const byte *read_p = exmap_res;
		size_t read_len = exmap_res_len;

		assert(ActmapModule.init);
		assert(exmap_res != NULL);

		(void)read_len;

		// Load exits
		exit_ct = ys_read_s16_le(read_p, &read_p);
		if (exit_ct < 0) {
			return R_FAILURE;
		}

		exmap_entry = (R_ACTIONMAP_ENTRY *)malloc(exit_ct * sizeof *exmap_entry);
		if (exmap_entry == NULL) {
			R_printf(R_STDERR, "Memory allocation failure.\n");
			return R_MEM;
		}

		for (i = 0; i < exit_ct; i++) {
			exmap_entry[i].unknown00 = ys_read_s16_le(read_p, &read_p);
			exmap_entry[i].unknown02 = ys_read_s16_le(read_p, &read_p);
			exmap_entry[i].exit_scene = ys_read_s16_le(read_p, &read_p);
			exmap_entry[i].unknown06 = ys_read_s16_le(read_p, &read_p);

			exmap_entry[i].pt_count = ys_read_s16_le(read_p, &read_p);
			if (exmap_entry[i].pt_count < 0) {
				free(exmap_entry);
				return R_FAILURE;
			}

			exmap_pt_tbl = (R_POINT *)malloc(exmap_entry[i].pt_count * sizeof *exmap_pt_tbl);
			if (exmap_pt_tbl == NULL) {
				R_printf(R_STDERR, "Memory allocation failure.\n");
				return R_MEM;
			}

			for (pt = 0; pt < exmap_entry[i].pt_count; pt++) {
				exmap_pt_tbl[pt].x = ys_read_s16_le(read_p, &read_p);
				exmap_pt_tbl[pt].y = ys_read_s16_le(read_p, &read_p);
			}

			exmap_entry[i].pt_tbl = exmap_pt_tbl;
		}

		ActmapModule.exits_loaded = 1;
		ActmapModule.n_exits = exit_ct;
		ActmapModule.exits_tbl = exmap_entry;

		ActmapModule.exmap_res = exmap_res;
		ActmapModule.exmap_res_len = exmap_res_len;

		return R_SUCCESS;
	}

	int ACTIONMAP_Free(void) {
		// Frees the currently loaded exit map data
		R_ACTIONMAP_ENTRY *exmap_entry;
		int i;

		if (!ActmapModule.exits_loaded) {
			return R_SUCCESS;
		}

		for (i = 0; i < ActmapModule.n_exits; i++) {
			exmap_entry = &ActmapModule.exits_tbl[i];

			free(exmap_entry->pt_tbl);
		}

		free(ActmapModule.exits_tbl);

		ActmapModule.exits_loaded = 0;
		ActmapModule.exits_tbl = NULL;
		ActmapModule.n_exits = 0;

		return R_SUCCESS;
	}

	int ACTIONMAP_Shutdown(void) {
		return R_SUCCESS;
	}

	int ACTIONMAP_Draw(R_SURFACE * ds, int color) {
		int i;

		assert(ActmapModule.init);

		if (!ActmapModule.exits_loaded) {
			return R_FAILURE;
		}

		for (i = 0; i < ActmapModule.n_exits; i++) {

			if (ActmapModule.exits_tbl[i].pt_count == 2) {

			GFX_DrawFrame(ds,
				&ActmapModule.exits_tbl[i].pt_tbl[0],
				&ActmapModule.exits_tbl[i].pt_tbl[1], color);
			} else if (ActmapModule.exits_tbl[i].pt_count > 2) {
				GFX_DrawPolyLine(ds, ActmapModule.exits_tbl[i].pt_tbl,
						ActmapModule.exits_tbl[i].pt_count, color);
			}
		}

		return R_SUCCESS;
	}

	void CF_action_info(int argc, char *argv[]) {
		R_POINT *pt;

		int i;
		int pt_i;

		YS_IGNORE_PARAM(argc);
		YS_IGNORE_PARAM(argv);

		if (!ActmapModule.exits_loaded) {
			return;
		}

		CON_Print("%d exits loaded.\n", ActmapModule.n_exits);

		for (i = 0; i < ActmapModule.n_exits; i++) {

			CON_Print ("Action %d: Exit to: %d; Pts: %d; Unk0: %d Unk2: %d Scr_N: %d",
					i, ActmapModule.exits_tbl[i].exit_scene,
					ActmapModule.exits_tbl[i].pt_count,
					ActmapModule.exits_tbl[i].unknown00,
					ActmapModule.exits_tbl[i].unknown02,
					ActmapModule.exits_tbl[i].unknown06);

			for (pt_i = 0; pt_i < ActmapModule.exits_tbl[i].pt_count; pt_i++) {
				pt = &ActmapModule.exits_tbl[i].pt_tbl[pt_i];

				CON_Print("   pt: %d (%d, %d)", pt_i, pt->x, pt->y);
			}
		}

		return;
	}

} // End of namespace Saga