1

#include "stdafx.h"

     2

#include "ttd.h"

     3

#include "table/strings.h"

     4

#include "signs.h"

     5

#include "saveload.h"

     6

#include "command.h"

     7

     8

enum {

     9

	/* Max signs: 64000 (4 * 16000) */

    10

	SIGN_POOL_BLOCK_SIZE_BITS = 2,       /* In bits, so (1 << 2) == 4 */

    11

	SIGN_POOL_MAX_BLOCKS      = 16000,

    12

};

    13

    14

/**

    15

 * Called if a new block is added to the sign-pool

    16

 */

    17

static void SignPoolNewBlock(uint start_item)

    18

{

    19

	SignStruct *ss;

    20

    21

	FOR_ALL_SIGNS_FROM(ss, start_item)

    22

		ss->index = start_item++;

    23

}

    24

    25

/* Initialize the sign-pool */

    26

MemoryPool _sign_pool = { "Signs", SIGN_POOL_MAX_BLOCKS, SIGN_POOL_BLOCK_SIZE_BITS, sizeof(SignStruct), &SignPoolNewBlock, 0, 0, NULL };

    27

    28

/**

    29

 *

    30

 * Update the coordinate of one sign

    31

 *

    32

 */

    33

static void UpdateSignVirtCoords(SignStruct *ss)

    34

{

    35

	Point pt = RemapCoords(ss->x, ss->y, ss->z);

    36

	SetDParam(0, ss->str);

    37

	UpdateViewportSignPos(&ss->sign, pt.x, pt.y - 6, STR_2806);

    38

}

    39

    40

/**

    41

 *

    42

 * Update the coordinates of all signs

    43

 *

    44

 */

    45

void UpdateAllSignVirtCoords(void)

    46

{

    47

	SignStruct *ss;

    48

    49

	FOR_ALL_SIGNS(ss)

    50

		if (ss->str != 0)

    51

			UpdateSignVirtCoords(ss);

    52

    53

}

    54

    55

/**

    56

 *

    57

 * Marks the region of a sign as dirty

    58

 *

    59

 * @param ss Pointer to the SignStruct

    60

 */

    61

static void MarkSignDirty(SignStruct *ss)

    62

{

    63

	MarkAllViewportsDirty(

    64

		ss->sign.left - 6,

    65

		ss->sign.top  - 3,

    66

		ss->sign.left + ss->sign.width_1 * 4 + 12,

    67

		ss->sign.top  + 45);

    68

}

    69

    70

/**

    71

 *

    72

 * Allocates a new sign

    73

 *

    74

 * @return The pointer to the new sign, or NULL if there is no more free space

    75

 */

    76

static SignStruct *AllocateSign(void)

    77

{

    78

	SignStruct *s;

    79

	FOR_ALL_SIGNS(s)

    80

		if (s->str == 0)

    81

			return s;

    82

    83

	/* Check if we can add a block to the pool */

    84

	if (AddBlockToPool(&_sign_pool))

    85

		return AllocateSign();

    86

    87

	return NULL;

    88

}

    89

    90

/**

    91

 *

    92

 * Place a sign at the given x/y

    93

 *

    94

 * @param p1 player number

    95

 * @param p2 not used

    96

 */

    97

int32 CmdPlaceSign(int x, int y, uint32 flags, uint32 p1, uint32 p2)

    98

{

    99

	SignStruct *ss;

   100

   101

	/* Try to locate a new sign */

   102

	ss = AllocateSign();

   103

	if (ss == NULL)

   104

		return_cmd_error(STR_2808_TOO_MANY_SIGNS);

   105

   106

	/* When we execute, really make the sign */

   107

	if (flags & DC_EXEC) {

   108

		ss->str = STR_280A_SIGN;

   109

		ss->x = x;

   110

		ss->y = y;

   111

		ss->owner = p1;

   112

		ss->z = GetSlopeZ(x,y);

   113

		UpdateSignVirtCoords(ss);

   114

		MarkSignDirty(ss);

   115

		_new_sign_struct = ss;

   116

	}

   117

   118

	return 0;

   119

}

   120

   121

/**

   122

 * Rename a sign

   123

 *

   124

 * @param sign_id Index of the sign

   125

 * @param new owner, if OWNER_NONE, sign will be removed, except in scenario editor, where signs have no owner

   126

 * and ownership has no influence of any kind

   127

 */

   128

int32 CmdRenameSign(int x, int y, uint32 flags, uint32 sign_id, uint32 owner)

   129

{

   130

	StringID str;

   131

	SignStruct *ss;

   132

   133

	/* If GetDParam(0) == nothing, we delete the sign */

   134

	if (GetDParam(0) != 0 && (_game_mode == GM_EDITOR || owner != OWNER_NONE)) {

   135

		/* Create the name */

   136

		str = AllocateName((const char*)_decode_parameters, 0);

   137

		if (str == 0)

   138

			return CMD_ERROR;

   139

   140

		if (flags & DC_EXEC) {

   141

			ss = GetSign(sign_id);

   142

   143

			MarkSignDirty(ss);

   144

   145

			/* Delete the old name */

   146

			DeleteName(ss->str);

   147

			/* Assign the new one */

   148

			ss->str = str;

   149

			ss->owner = owner;

   150

   151

			/* Update */

   152

			UpdateSignVirtCoords(ss);

   153

			MarkSignDirty(ss);

   154

		} else {

   155

			/* Free the name, because we did not assign it yet */

   156

			DeleteName(str);

   157

		}

   158

	} else {

   159

		/* Delete sign */

   160

		if (flags & DC_EXEC) {

   161

			ss = GetSign(sign_id);

   162

   163

			/* Delete the name */

   164

			DeleteName(ss->str);

   165

			ss->str = 0;

   166

   167

			MarkSignDirty(ss);

   168

		}

   169

	}

   170

   171

	return 0;

   172

}

   173

   174

/**

   175

 *

   176

 * Callback function that is called after a sign is placed

   177

 *

   178

 */

   179

void CcPlaceSign(bool success, uint tile, uint32 p1, uint32 p2)

   180

{

   181

	if (success) {

   182

		ShowRenameSignWindow(_new_sign_struct);

   183

		ResetObjectToPlace();

   184

	}

   185

}

   186

   187

/**

   188

 *

   189

 * PlaceProc function, called when someone pressed the button if the

   190

 *  sign-tool is selected

   191

 *

   192

 */

   193

void PlaceProc_Sign(uint tile)

   194

{

   195

	DoCommandP(tile, _current_player, 0, CcPlaceSign, CMD_PLACE_SIGN | CMD_MSG(STR_2809_CAN_T_PLACE_SIGN_HERE));

   196

}

   197

   198

/**

   199

 *

   200

 * Initialize the signs

   201

 *

   202

 */

   203

void InitializeSigns(void)

   204

{

   205

	CleanPool(&_sign_pool);

   206

	AddBlockToPool(&_sign_pool);

   207

}

   208

   209

static const byte _sign_desc[] = {

   210

	SLE_VAR(SignStruct,str,						SLE_UINT16),

   211

	SLE_CONDVAR(SignStruct,x,					SLE_FILE_I16 | SLE_VAR_I32, 0, 4),

   212

	SLE_CONDVAR(SignStruct,y,					SLE_FILE_I16 | SLE_VAR_I32, 0, 4),

   213

	SLE_CONDVAR(SignStruct,x,					SLE_INT32, 5, 255),

   214

	SLE_CONDVAR(SignStruct,y,					SLE_INT32, 5, 255),

   215

	SLE_CONDVAR(SignStruct,owner,			SLE_UINT8, 6, 255),

   216

	SLE_VAR(SignStruct,z,							SLE_UINT8),

   217

	SLE_END()

   218

};

   219

   220

/**

   221

 *

   222

 * Save all signs

   223

 *

   224

 */

   225

static void Save_SIGN(void)

   226

{

   227

	SignStruct *ss;

   228

   229

	FOR_ALL_SIGNS(ss) {

   230

		/* Don't save empty signs */

   231

		if (ss->str != 0) {

   232

			SlSetArrayIndex(ss->index);

   233

			SlObject(ss, _sign_desc);

   234

		}

   235

	}

   236

}

   237

   238

/**

   239

 *

   240

 * Load all signs

   241

 *

   242

 */

   243

static void Load_SIGN(void)

   244

{

   245

	int index;

   246

	while ((index = SlIterateArray()) != -1) {

   247

		SignStruct *ss;

   248

   249

		if (!AddBlockIfNeeded(&_sign_pool, index))

   250

			error("Signs: failed loading savegame: too many signs");

   251

   252

		ss = GetSign(index);

   253

		SlObject(ss, _sign_desc);

   254

	}

   255

}

   256

   257

const ChunkHandler _sign_chunk_handlers[] = {

   258

	{ 'SIGN', Save_SIGN, Load_SIGN, CH_ARRAY | CH_LAST},

   259

};