1

#include "stdafx.h"

     2

#include "ttd.h"

     3

#include "table/strings.h"

     4

#include "map.h"

     5

#include "viewport.h"

     6

#include "window.h"

     7

#include "vehicle.h"

     8

#include "station.h"

     9

#include "gfx.h"

    10

#include "town.h"

    11

#include "signs.h"

    12

    13

#define VIEWPORT_DRAW_MEM (65536 * 2)

    14

    15

static bool _added_tile_sprite;

    16

static bool _offset_ground_sprites;

    17

    18

typedef struct StringSpriteToDraw {

    19

	uint16 string;

    20

	uint16 color;

    21

	struct StringSpriteToDraw *next;

    22

	int32 x;

    23

	int32 y;

    24

	uint32 params[3];

    25

	uint16 width;

    26

} StringSpriteToDraw;

    27

    28

typedef struct TileSpriteToDraw {

    29

	uint32 image;

    30

	struct TileSpriteToDraw *next;

    31

	int32 x;

    32

	int32 y;

    33

	byte z;

    34

} TileSpriteToDraw;

    35

    36

typedef struct ChildScreenSpriteToDraw {

    37

	uint32 image;

    38

	int32 x;

    39

	int32 y;

    40

	struct ChildScreenSpriteToDraw *next;

    41

} ChildScreenSpriteToDraw;

    42

    43

typedef struct ParentSpriteToDraw {

    44

	uint32 image;

    45

	int32 left;

    46

	int32 top;

    47

	int32 right;

    48

	int32 bottom;

    49

	int32 tile_x;

    50

	int32 tile_y;

    51

	int32 tile_right;

    52

	int32 tile_bottom;

    53

	ChildScreenSpriteToDraw *child;

    54

	byte unk16;

    55

	byte tile_z;

    56

	byte tile_z_bottom;

    57

} ParentSpriteToDraw;

    58

    59

typedef struct ViewportDrawer {

    60

	DrawPixelInfo dpi;

    61

    62

	byte *spritelist_mem, *eof_spritelist_mem;

    63

    64

	StringSpriteToDraw **last_string, *first_string;

    65

	TileSpriteToDraw **last_tile, *first_tile;

    66

    67

	ChildScreenSpriteToDraw **last_child;

    68

    69

	ParentSpriteToDraw **parent_list;

    70

	ParentSpriteToDraw **eof_parent_list;

    71

    72

	byte combine_sprites;

    73

    74

	int offs_x, offs_y; // used when drawing ground sprites relative

    75

	bool ground_child;

    76

} ViewportDrawer;

    77

    78

static ViewportDrawer *_cur_vd;

    79

    80

TileHighlightData * const _thd_ptr = &_thd;

    81

static TileInfo *_cur_ti;

    82

    83

    84

Point MapXYZToViewport(ViewPort *vp, uint x, uint y, uint z)

    85

{

    86

	Point p = RemapCoords(x, y, z);

    87

	p.x -= (vp->virtual_width>>1);

    88

	p.y -= (vp->virtual_height>>1);

    89

	return p;

    90

}

    91

    92

void AssignWindowViewport(Window *w, int x, int y,

    93

	int width, int height, uint32 follow_flags, byte zoom)

    94

{

    95

	ViewPort *vp;

    96

	Point pt;

    97

	byte z;

    98

	uint32 bit;

    99

   100

	for(vp=_viewports,bit=1; ; vp++, bit<<=1) {

   101

		assert(vp!=endof(_viewports));

   102

		if (vp->width == 0)

   103

			break;

   104

	}

   105

	_active_viewports |= bit;

   106

   107

	vp->left = x + w->left;

   108

	vp->top = y + w->top;

   109

	vp->width = width;

   110

	vp->height = height;

   111

   112

	vp->zoom = zoom;

   113

   114

	vp->virtual_width = width << zoom;

   115

	vp->virtual_height = height << zoom;

   116

   117

	if (follow_flags & 0x80000000) {

   118

		Vehicle *veh;

   119

		WP(w,vp_d).follow_vehicle = (VehicleID)(follow_flags & 0xFFFF);

   120

		veh = GetVehicle(WP(w,vp_d).follow_vehicle);

   121

		pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);

   122

	} else {

   123

		int x = TileX(follow_flags) * 16;

   124

		int y = TileY(follow_flags) * 16;

   125

		WP(w,vp_d).follow_vehicle = 0xFFFF;

   126

		z = GetSlopeZ(x,y);

   127

		pt = MapXYZToViewport(vp, x,y, z);

   128

	}

   129

   130

	WP(w,vp_d).scrollpos_x = pt.x;

   131

	WP(w,vp_d).scrollpos_y = pt.y;

   132

	w->viewport = vp;

   133

	vp->virtual_left = 0;//pt.x;

   134

	vp->virtual_top = 0;//pt.y;

   135

}

   136

   137

static Point _vp_move_offs;

   138

   139

static void DoSetViewportPosition(Window *w, int left, int top, int width, int height)

   140

{

   141

	for (; w < _last_window; w++) {

   142

		if (left + width > w->left &&

   143

				w->left+w->width > left &&

   144

				top + height > w->top &&

   145

				w->top+w->height > top) {

   146

   147

			if (left < w->left) {

   148

				DoSetViewportPosition(w, left, top, w->left - left, height);

   149

				DoSetViewportPosition(w, left + (w->left - left), top, width - (w->left - left), height);

   150

				return;

   151

			}

   152

   153

			if (left + width > w->left + w->width) {

   154

				DoSetViewportPosition(w, left, top, (w->left + w->width - left), height);

   155

				DoSetViewportPosition(w, left + (w->left + w->width - left), top, width - (w->left + w->width - left) , height);

   156

				return;

   157

			}

   158

   159

			if (top < w->top) {

   160

				DoSetViewportPosition(w, left, top, width, (w->top - top));

   161

				DoSetViewportPosition(w, left, top + (w->top - top), width, height - (w->top - top));

   162

				return;

   163

			}

   164

   165

			if (top + height > w->top + w->height) {

   166

				DoSetViewportPosition(w, left, top, width, (w->top + w->height - top));

   167

				DoSetViewportPosition(w, left, top + (w->top + w->height - top), width , height - (w->top + w->height - top));

   168

				return;

   169

			}

   170

   171

			return;

   172

		}

   173

	}

   174

   175

	{

   176

		int xo = _vp_move_offs.x;

   177

		int yo = _vp_move_offs.y;

   178

   179

		if (abs(xo) >= width || abs(yo) >= height) {

   180

			/* fully_outside */

   181

			RedrawScreenRect(left, top, left+width, top+height);

   182

			return;

   183

		}

   184

   185

		GfxScroll(left, top, width, height, xo, yo);

   186

   187

		if (xo > 0) {

   188

			RedrawScreenRect(left, top, xo + left, top + height);

   189

			left += xo;

   190

			width -= xo;

   191

		} else if (xo < 0) {

   192

			RedrawScreenRect(left+width+xo, top, left+width, top + height);

   193

			width += xo;

   194

		}

   195

   196

		if (yo > 0) {

   197

			RedrawScreenRect(left, top, width+left, top + yo);

   198

		} else if (yo < 0) {

   199

			RedrawScreenRect(left, top + height + yo, width+left, top + height);

   200

		}

   201

	}

   202

}

   203

   204

void SetViewportPosition(Window *w, int x, int y)

   205

{

   206

	ViewPort *vp = w->viewport;

   207

	int old_left = vp->virtual_left;

   208

	int old_top = vp->virtual_top;

   209

	int i;

   210

	int left, top, width, height;

   211

   212

	vp->virtual_left = x;

   213

	vp->virtual_top = y;

   214

   215

	old_left >>= vp->zoom;

   216

	old_top >>= vp->zoom;

   217

	x >>= vp->zoom;

   218

	y >>= vp->zoom;

   219

   220

	old_left -= x;

   221

	old_top -= y;

   222

   223

	if (old_top == 0 && old_left == 0)

   224

		return;

   225

   226

	_vp_move_offs.x = old_left;

   227

	_vp_move_offs.y = old_top;

   228

   229

	left = vp->left;

   230

	top = vp->top;

   231

	width = vp->width;

   232

	height = vp->height;

   233

   234

	if (left < 0) {

   235

		width += left;

   236

		left = 0;

   237

	}

   238

   239

	if ( (i=(left + width - _screen.width)) >= 0)

   240

		width -= i;

   241

   242

	if (width > 0) {

   243

		if (top < 0) {

   244

			height += top;

   245

			top = 0;

   246

		}

   247

   248

		if ( (i=(top + height - _screen.height)) >= 0) {

   249

			height -= i;

   250

		}

   251

   252

		if (height > 0)

   253

			DoSetViewportPosition(w+1, left, top, width, height);

   254

	}

   255

}

   256

   257

   258

ViewPort *IsPtInWindowViewport(Window *w, int x, int y)

   259

{

   260

	ViewPort *vp = w->viewport;

   261

	if (vp != NULL &&

   262

	    IS_INT_INSIDE(x, vp->left, vp->left + vp->width) &&

   263

			IS_INT_INSIDE(y, vp->top, vp->top + vp->height))

   264

		return vp;

   265

   266

	return NULL;

   267

}

   268

   269

Point TranslateXYToTileCoord(ViewPort *vp, int x, int y) {

   270

	int z;

   271

	Point pt;

   272

	int a,b;

   273

   274

	if ( (uint)(x -= vp->left) >= (uint)vp->width ||

   275

				(uint)(y -= vp->top) >= (uint)vp->height) {

   276

				Point pt = {-1, -1};

   277

				return pt;

   278

	}

   279

   280

	x = ((x << vp->zoom) + vp->virtual_left) >> 2;

   281

	y = ((y << vp->zoom) + vp->virtual_top) >> 1;

   282

   283

#if !defined(NEW_ROTATION)

   284

	a = y-x;

   285

	b = y+x;

   286

#else

   287

	a = x+y;

   288

	b = x-y;

   289

#endif

   290

	z = GetSlopeZ(a, b) >> 1;

   291

	z = GetSlopeZ(a+z, b+z) >> 1;

   292

	z = GetSlopeZ(a+z, b+z) >> 1;

   293

	z = GetSlopeZ(a+z, b+z) >> 1;

   294

	z = GetSlopeZ(a+z, b+z) >> 1;

   295

   296

	pt.x = a+z;

   297

	pt.y = b+z;

   298

   299

	if ((uint)pt.x >= MapMaxX() * 16 || (uint)pt.y >= MapMaxY() * 16) {

   300

		pt.x = pt.y = -1;

   301

	}

   302

   303

	return pt;

   304

}

   305

   306

/* When used for zooming, check area below current coordinates (x,y)

   307

 * and return the tile of the zoomed out/in position (zoom_x, zoom_y)

   308

 * when you just want the tile, make x = zoom_x and y = zoom_y */

   309

static Point GetTileFromScreenXY(int x, int y, int zoom_x, int zoom_y)

   310

{

   311

	Window *w;

   312

	ViewPort *vp;

   313

	Point pt;

   314

   315

	if ( (w = FindWindowFromPt(x, y)) != NULL &&

   316

			 (vp = IsPtInWindowViewport(w, x, y)) != NULL)

   317

				return TranslateXYToTileCoord(vp, zoom_x, zoom_y);

   318

   319

	pt.y = pt.x = -1;

   320

	return pt;

   321

}

   322

   323

Point GetTileBelowCursor()

   324

{

   325

	return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, _cursor.pos.x, _cursor.pos.y);

   326

}

   327

   328

   329

Point GetTileZoomCenterWindow(bool in, Window * w)

   330

{

   331

	int x, y;

   332

	ViewPort * vp;

   333

   334

	vp = w->viewport;

   335

   336

	if (in)	{

   337

		x = ( (_cursor.pos.x - vp->left ) >> 1) + (vp->width >> 2);

   338

		y = ( (_cursor.pos.y - vp->top ) >> 1) + (vp->height >> 2);

   339

	}

   340

	else {

   341

		x = vp->width - (_cursor.pos.x - vp->left);

   342

		y = vp->height - (_cursor.pos.y - vp->top);

   343

	}

   344

	/* Get the tile below the cursor and center on the zoomed-out center */

   345

	return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, x + vp->left, y + vp->top);

   346

}

   347

   348

void DrawGroundSpriteAt(uint32 image, int32 x, int32 y, byte z)

   349

{

   350

	ViewportDrawer *vd = _cur_vd;

   351

	TileSpriteToDraw *ts;

   352

   353

	assert( (image & 0x3fff) < NUM_SPRITES);

   354

   355

	ts = (TileSpriteToDraw*)vd->spritelist_mem;

   356

	if ((byte*)ts >= vd->eof_spritelist_mem) {

   357

		DEBUG(misc, 0) ("Out of sprite mem\n");

   358

		return;

   359

	}

   360

   361

	vd->spritelist_mem += sizeof(TileSpriteToDraw);

   362

   363

	ts->image = image;

   364

	ts->next = NULL;

   365

	ts->x = x;

   366

	ts->y = y;

   367

	ts->z = z;

   368

	*vd->last_tile = ts;

   369

	vd->last_tile = &ts->next;

   370

}

   371

   372

void DrawGroundSprite(uint32 image)

   373

{

   374

	if (_offset_ground_sprites) {

   375

		// offset ground sprite because of foundation?

   376

		AddChildSpriteScreen(image, _cur_vd->offs_x, _cur_vd->offs_y);

   377

	} else {

   378

			_added_tile_sprite = true;

   379

		DrawGroundSpriteAt(image, _cur_ti->x, _cur_ti->y, _cur_ti->z);

   380

	}

   381

}

   382

   383

   384

void OffsetGroundSprite(int x, int y)

   385

{

   386

	_cur_vd->offs_x = x;

   387

	_cur_vd->offs_y = y;

   388

	_offset_ground_sprites = true;

   389

}

   390

   391

static void AddCombinedSprite(uint32 image, int x, int y, byte z)

   392

{

   393

	ViewportDrawer *vd = _cur_vd;

   394

	int t;

   395

	uint32 image_org = image;

   396

	const SpriteDimension *sd;

   397

	Point pt = RemapCoords(x, y, z);

   398

   399

	sd = GetSpriteDimension(image & 0x3FFF);

   400

   401

	if ((t = pt.x + sd->xoffs) >= vd->dpi.left + vd->dpi.width ||

   402

			(t + sd->xsize) <= vd->dpi.left ||

   403

			(t = pt.y + sd->yoffs) >= vd->dpi.top + vd->dpi.height ||

   404

			(t + sd->ysize) <= vd->dpi.top)

   405

		return;

   406

   407

	AddChildSpriteScreen(image_org, pt.x - vd->parent_list[-1]->left, pt.y - vd->parent_list[-1]->top);

   408

}

   409

   410

   411

void AddSortableSpriteToDraw(uint32 image, int x, int y, int w, int h, byte dz, byte z)

   412

{

   413

	ViewportDrawer *vd = _cur_vd;

   414

	ParentSpriteToDraw *ps;

   415

	const SpriteDimension *sd;

   416

	Point pt;

   417

   418

	assert( (image & 0x3fff) < NUM_SPRITES);

   419

   420

	if (vd->combine_sprites == 2) {

   421

		AddCombinedSprite(image, x, y, z);

   422

		return;

   423

	}

   424

   425

	vd->last_child = NULL;

   426

   427

	ps = (ParentSpriteToDraw*)vd->spritelist_mem;

   428

	if ((byte*)ps >= vd->eof_spritelist_mem) {

   429

		DEBUG(misc, 0) ("Out of sprite mem\n");

   430

		return;

   431

	}

   432

	if (vd->parent_list >= vd->eof_parent_list) {

   433

		// This can happen rarely, mostly when you zoom out completely

   434

		//  and have a lot of stuff that moves (and is added to the

   435

		//  sort-list, this function). To solve it, increase

   436

		//  parent_list somewhere below to a higher number.

   437

		// This can not really hurt you, it just gives some black

   438

		//  spots on the screen ;)

   439

		DEBUG(misc, 0) ("Out of sprite mem (parent_list)\n");

   440

		return;

   441

	}

   442

   443

	vd->spritelist_mem += sizeof(ParentSpriteToDraw);

   444

   445

	ps->image = image;

   446

	ps->tile_x = x;

   447

	ps->tile_right = x + w - 1;

   448

   449

	ps->tile_y = y;

   450

	ps->tile_bottom = y + h - 1;

   451

   452

	ps->tile_z = z;

   453

	ps->tile_z_bottom = z + dz - 1;

   454

   455

	pt = RemapCoords(x, y, z);

   456

   457

	sd = GetSpriteDimension(image & 0x3FFF);

   458

	if ((ps->left = (pt.x += sd->xoffs)) >= vd->dpi.left + vd->dpi.width ||

   459

			(ps->right = (pt.x + sd->xsize)) <= vd->dpi.left ||

   460

			(ps->top = (pt.y += sd->yoffs)) >= vd->dpi.top + vd->dpi.height ||

   461

			(ps->bottom = (pt.y + sd->ysize)) <= vd->dpi.top) {

   462

		return;

   463

	}

   464

   465

	ps->unk16 = 0;

   466

	ps->child = NULL;

   467

	vd->last_child = &ps->child;

   468

   469

	*vd->parent_list++ = ps;

   470

   471

	if (vd->combine_sprites == 1) {

   472

		vd->combine_sprites = 2;

   473

	}

   474

}

   475

   476

void StartSpriteCombine()

   477

{

   478

	_cur_vd->combine_sprites = 1;

   479

}

   480

   481

void EndSpriteCombine()

   482

{

   483

	_cur_vd->combine_sprites = 0;

   484

}

   485

   486

void AddChildSpriteScreen(uint32 image, int x, int y)

   487

{

   488

	ViewportDrawer *vd = _cur_vd;

   489

	ChildScreenSpriteToDraw *cs;

   490

   491

	assert( (image & 0x3fff) < NUM_SPRITES);

   492

   493

	cs = (ChildScreenSpriteToDraw*) vd->spritelist_mem;

   494

	if ((byte*)cs >= vd->eof_spritelist_mem) {

   495

		DEBUG(misc,0) ("Out of sprite mem\n");

   496

		return;

   497

	}

   498

   499

	if (vd->last_child == NULL)

   500

		return;

   501

   502

	vd->spritelist_mem += sizeof(ChildScreenSpriteToDraw);

   503

   504

	*vd->last_child = cs;

   505

	vd->last_child = &cs->next;

   506

   507

	cs->image = image;

   508

	cs->x = x;

   509

	cs->y = y;

   510

	cs->next = NULL;

   511

}

   512

   513

/* Returns a StringSpriteToDraw */

   514

void *AddStringToDraw(int x, int y, StringID string, uint32 params_1, uint32 params_2, uint32 params_3)

   515

{

   516

	ViewportDrawer *vd = _cur_vd;

   517

	StringSpriteToDraw *ss;

   518

   519

	ss = (StringSpriteToDraw*)vd->spritelist_mem;