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#include "stdafx.h"

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#include <stdarg.h>

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#include "openttd.h"

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#include "debug.h"

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#include "gfx.h"

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#include "fileio.h"

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#include "engine.h"

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#include "station.h"

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#include "sprite.h"

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#include "newgrf.h"

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/* TTDPatch extended GRF format codec

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 * (c) Petr Baudis 2004 (GPL'd)

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 * Changes by Florian octo Forster are (c) by the OpenTTD development team.

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 *

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 * Contains portions of documentation by TTDPatch team.

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 * Thanks especially to Josef Drexler for the documentation as well as a lot

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 * of help at #tycoon. Also thanks to Michael Blunck for is GRF files which

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 * served as subject to the initial testing of this codec. */

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extern int _skip_sprites;

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extern int _replace_sprites_count[16];

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extern int _replace_sprites_offset[16];

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extern int _traininfo_vehicle_pitch;

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GRFFile *_cur_grffile;

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GRFFile *_first_grffile;

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int _grffile_count;

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static int _cur_spriteid;

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static int _cur_stage;

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extern uint16 _custom_sprites_base;

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static int32 _paramlist[0x7f];

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static int _param_max;

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/* 32 * 8 = 256 flags. Apparently TTDPatch uses this many.. */

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static uint32 _ttdpatch_flags[8];

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typedef enum grfspec_feature {

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	GSF_TRAIN,

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	GSF_ROAD,

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	GSF_SHIP,

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	GSF_AIRCRAFT,

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	GSF_STATION,

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	GSF_BRIDGE,

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	GSF_TOWNHOUSE,

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} grfspec_feature;

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typedef void (*SpecialSpriteHandler)(byte *buf, int len);

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static const int _vehcounts[4] = {

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	/* GSF_TRAIN */    NUM_TRAIN_ENGINES,

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	/* GSF_ROAD */     NUM_ROAD_ENGINES,

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	/* GSF_SHIP */     NUM_SHIP_ENGINES,

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	/* GSF_AIRCRAFT */ NUM_AIRCRAFT_ENGINES

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};

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static const int _vehshifts[4] = {

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	/* GSF_TRAIN */    0,

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	/* GSF_ROAD */     ROAD_ENGINES_INDEX,

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	/* GSF_SHIP */     SHIP_ENGINES_INDEX,

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	/* GSF_AIRCRAFT */ AIRCRAFT_ENGINES_INDEX,

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};

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/* Debugging messages policy:

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 *

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 * These should be the severities used for direct DEBUG() calls

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 * (there is room for exceptions, but you have to have a good cause):

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 *

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 * 0..2 - dedicated to grfmsg()

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 * 3

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 * 4

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 * 5

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 * 6 - action handler entry reporting - one per action

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 * 7 - basic action progress reporting - in loops, only single one allowed

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 * 8 - more detailed progress reporting - less important stuff, in deep loops etc

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 * 9 - extremely detailed progress reporting - detailed reports inside of deep loops and so

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 */

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typedef enum grfmsg_severity {

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	GMS_NOTICE,

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	GMS_WARN,

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	GMS_ERROR,

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	GMS_FATAL,

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} grfmsg_severity;

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static void CDECL grfmsg(grfmsg_severity severity, const char *str, ...)

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{

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	static const char* const severitystr[] = {

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		"Notice",

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		"Warning",

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		"Error",

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		"Fatal"

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	};

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	int export_severity = 0;

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	char buf[1024];

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	va_list va;

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	va_start(va, str);

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	vsnprintf(buf, sizeof(buf), str, va);

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	va_end(va);

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	export_severity = 2 - (severity == GMS_FATAL ? 2 : severity);

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	DEBUG(grf, export_severity) ("[%s][%s] %s", _cur_grffile->filename, severitystr[severity], buf);

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}

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#define check_length(real, wanted, where) \

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do { \

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	if (real < wanted) { \

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		grfmsg(GMS_ERROR, "%s/%d: Invalid special sprite length %d (expected %d)!", \

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		       where, _cur_spriteid - _cur_grffile->sprite_offset, real, wanted); \

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		return; \

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	} \

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} while (0)

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static inline byte grf_load_byte(byte **buf)

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{

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	return *(*buf)++;

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}

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static uint16 grf_load_word(byte **buf)

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{

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	uint16 val;

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	byte *p = *buf;

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	val = p[0];

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	val |= p[1] << 8;

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	*buf = p + 2;

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	return val;

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}

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static uint16 grf_load_dword(byte **buf)

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{

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	uint32 val;

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	byte *p = *buf;

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	val = p[0];

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	val |= p[1] << 8;

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	val |= p[2] << 16;

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	val |= p[3] << 24;

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	*buf = p + 4;

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	return val;

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}

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static GRFFile *GetFileByGRFID(uint32 grfid)

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{

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	GRFFile *file;

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	for (file = _first_grffile; file != NULL; file = file->next) {

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		if (file->grfid == grfid) break;

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	}

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	return file;

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}

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static GRFFile *GetFileByFilename(const char *filename)

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{

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	GRFFile *file;

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	for (file = _first_grffile; file != NULL; file = file->next) {

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		if (strcmp(file->filename, filename) == 0) break;

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	}

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	return file;

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}

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typedef bool (*VCI_Handler)(uint engine, int numinfo, int prop, byte **buf, int len);

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#define FOR_EACH_OBJECT for (i = 0; i < numinfo; i++)

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static void dewagonize(int condition, int engine)

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{

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	EngineInfo *ei = &_engine_info[engine];

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	RailVehicleInfo *rvi = &_rail_vehicle_info[engine];

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	if (condition != 0) {

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		ei->unk2 &= ~0x80;

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		rvi->flags &= ~2;

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	} else {

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		ei->unk2 |= 0x80;

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		rvi->flags |= 2;

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	}

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}

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static bool RailVehicleChangeInfo(uint engine, int numinfo, int prop, byte **bufp, int len)

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{

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	EngineInfo *ei = &_engine_info[engine];

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	RailVehicleInfo *rvi = &_rail_vehicle_info[engine];

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	byte *buf = *bufp;

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	int i;

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	bool ret = false;

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	switch (prop) {

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			FOR_EACH_OBJECT {

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				uint8 tracktype = grf_load_byte(&buf);

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				ei[i].railtype_climates &= 0xf;

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				ei[i].railtype_climates |= tracktype << 4;

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			}

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			/* TODO */

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			FOR_EACH_OBJECT {

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				grf_load_byte(&buf);

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			}

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			ret = true;

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			FOR_EACH_OBJECT {

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				uint16 speed = grf_load_word(&buf);

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				rvi[i].max_speed = speed;

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				dewagonize(speed, engine + i);

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			}

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			FOR_EACH_OBJECT {

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				uint16 power = grf_load_word(&buf);

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				if (rvi[i].flags & RVI_MULTIHEAD)

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					power /= 2;

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				rvi[i].power = power;

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				dewagonize(power, engine + i);

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			}

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			FOR_EACH_OBJECT {

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				uint8 runcostfact = grf_load_byte(&buf);

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				rvi[i].running_cost_base = runcostfact;

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				dewagonize(runcostfact, engine + i);

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			}

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			FOR_EACH_OBJECT {

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				uint32 base = grf_load_dword(&buf);

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				switch (base) {

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				case 0x4C30:

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					rvi[i].engclass = 0;

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					break;

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				case 0x4C36:

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					rvi[i].engclass = 1;

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					break;

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				case 0x4C3C:

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					rvi[i].engclass = 2;

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					break;

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				}

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				dewagonize(base, engine + i);

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			}

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			FOR_EACH_OBJECT {

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				uint8 spriteid = grf_load_byte(&buf);

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				if (spriteid == 0xFD && rvi[i].image_index != 0xFD)

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					_engine_original_sprites[engine + i] = rvi[i].image_index;

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				rvi[i].image_index = spriteid;

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			}

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			FOR_EACH_OBJECT {

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				uint8 dual = grf_load_byte(&buf);

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				if (dual != 0) {

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					if (!(rvi[i].flags & RVI_MULTIHEAD)) // adjust power if needed

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						rvi[i].power /= 2;

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					rvi[i].flags |= RVI_MULTIHEAD;

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				} else {

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					if (rvi[i].flags & RVI_MULTIHEAD) // adjust power if needed

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						rvi[i].power *= 2;

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					rvi[i].flags &= ~RVI_MULTIHEAD;

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				}

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			}

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			FOR_EACH_OBJECT {

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				uint8 capacity = grf_load_byte(&buf);

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				rvi[i].capacity = capacity;

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			}

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			FOR_EACH_OBJECT {

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				uint8 ctype = grf_load_byte(&buf);

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				rvi[i].cargo_type = ctype;

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			}

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			FOR_EACH_OBJECT {

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				uint8 weight = grf_load_byte(&buf);

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				rvi[i].weight = weight;

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			}

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			FOR_EACH_OBJECT {

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				uint8 cfactor = grf_load_byte(&buf);

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				rvi[i].base_cost = cfactor;

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			}

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			/* TODO: _railveh_score should be merged to _rail_vehicle_info. */

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			FOR_EACH_OBJECT {

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				grf_load_byte(&buf);

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			}

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			ret = true;

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		case 0x19: { /* Engine traction type */

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			/* TODO: What do the individual numbers mean?

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			 * XXX: And in what base are they, in fact? --pasky */

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			FOR_EACH_OBJECT {

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				uint8 traction = grf_load_byte(&buf);

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				int engclass;

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				if (traction <= 0x07)

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					engclass = 0;

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				else if (traction <= 0x27)

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					engclass = 1;

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				else if (traction <= 0x31)

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					engclass = 2;

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				else

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					break;

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				rvi[i].engclass = engclass;

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			}

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			FOR_EACH_OBJECT {

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				uint32 refit_mask = grf_load_dword(&buf);

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				_engine_refit_masks[engine + i] = refit_mask;

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			}

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			FOR_EACH_OBJECT {

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				byte callbacks = grf_load_byte(&buf);

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				rvi[i].callbackmask = callbacks;

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			}

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		/* TODO */

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		/* Fall-through for unimplemented one byte long properties. */

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		case 0x1A:	/* Sort order */

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		case 0x1C:	/* Refit cost */

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		case 0x1F:	/* Tractive effort */

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		case 0x20:	/* Air drag */

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		case 0x21:	/* Shorter tenders */

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		case 0x24:	/* High byte of vehicle weight */

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		case 0x25:	/* User-defined bit mask to set when checking veh. var. 42 */

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		case 0x26:	/* Retire vehicle early */

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			{

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			/* TODO */

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			FOR_EACH_OBJECT {

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				grf_load_byte(&buf);

   388

			}

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			ret = true;

   390

		}	break;

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		default:

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			ret = true;

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	}

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	*bufp = buf;

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	return ret;

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}

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static bool RoadVehicleChangeInfo(uint engine, int numinfo, int prop, byte **bufp, int len)

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{

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	RoadVehicleInfo *rvi = &_road_vehicle_info[engine];

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	byte *buf = *bufp;

   402

	int i;

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	bool ret = false;

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	switch (prop) {

   407

			FOR_EACH_OBJECT {

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				uint8 speed = grf_load_byte(&buf);

   409

   410

				rvi[i].max_speed = speed; // ?? units

   411

			}

   412

		}	break;

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			FOR_EACH_OBJECT {

   415

				uint8 runcost = grf_load_byte(&buf);

   416

   417

				rvi[i].running_cost = runcost;

   418

			}

   419

		}	break;

   421

			/* TODO: I have no idea. --pasky */

   422

			FOR_EACH_OBJECT {

   423

				grf_load_byte(&buf);

   424

			}

   425

			ret = true;

   428

			FOR_EACH_OBJECT {

   429

				uint8 spriteid = grf_load_byte(&buf);

   430

   431

				if (spriteid == 0xFF)

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					spriteid = 0xFD; // cars have different custom id in the GRF file

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				// This is currently not used but there's no reason

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				// in not having it here for the future.

   436

				if (spriteid == 0xFD && rvi[i].image_index != 0xFD)

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					_engine_original_sprites[ROAD_ENGINES_INDEX + engine + i] = rvi[i].image_index;

   438

   439

				rvi[i].image_index = spriteid;

   440

			}

   441

		}	break;

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			FOR_EACH_OBJECT {

   444

				uint16 capacity = grf_load_word(&buf);

   445

   446

				rvi[i].capacity = capacity;

   447

			}

   448

		}	break;

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		case 0x10: { /* Cargo type */

   450

			FOR_EACH_OBJECT {

   451

				uint8 cargo = grf_load_byte(&buf);

   452

   453

				rvi[i].cargo_type = cargo;

   454

			}

   455

		}	break;

   457

			FOR_EACH_OBJECT {

   458

				uint8 cost_factor = grf_load_byte(&buf);

   459

   460

				rvi[i].base_cost = cost_factor; // ?? is it base_cost?

   461

			}

   462

		}	break;

   464

			FOR_EACH_OBJECT {

   465

				uint8 sfx = grf_load_byte(&buf);

   466

   467

				rvi[i].sfx = sfx;

   468

			}

   469

		}	break;

   470

		case 0x13:      /* Power in 10hp */

   471

		case 0x14:      /* Weight in 1/4 tons */

   472

		case 0x15:      /* Speed in mph*0.8 */

   473

			/* TODO: Support for road vehicles realistic power

   474

			 * computations (called rvpower in TTDPatch) is just

   475

			 * missing in OTTD yet. --pasky */

   476

			FOR_EACH_OBJECT {

   477

				grf_load_byte(&buf);

   478

			}

   479

			ret = true;

   480

			break;

   481

		case 0x16: {	/* Cargos available for refitting */

   482

			FOR_EACH_OBJECT {

   483

				uint32 refit_mask = grf_load_dword(&buf);

   484

   485

				_engine_refit_masks[ROAD_ENGINES_INDEX + engine + i] = refit_mask;

   486

			}

   487

		}	break;

   488

		case 0x17:      /* Callback */

   489

		case 0x18:      /* Tractive effort */

   490

		case 0x19:      /* Air drag */

   491

		case 0x1A:      /* Refit cost */

   492

		case 0x1B:      /* Retire vehicle early */

   493

			{

   494

			/* TODO */

   495

			FOR_EACH_OBJECT {