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#include "stdafx.h"

     2

#include "openttd.h"

     3

#include "debug.h"

     4

#include "functions.h"

     5

#include "spritecache.h"

     6

#include "strings.h"

     7

#include "table/sprites.h"

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#include "table/strings.h"

     9

#include "map.h"

    10

#include "viewport.h"

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#include "window.h"

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#include "vehicle.h"

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#include "station.h"

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#include "gfx.h"

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#include "town.h"

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#include "signs.h"

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#include "waypoint.h"

    18

#include "variables.h"

    19

    20

#define VIEWPORT_DRAW_MEM (65536 * 2)

    21

    22

static bool _added_tile_sprite;

    23

static bool _offset_ground_sprites;

    24

    25

typedef struct StringSpriteToDraw {

    26

	uint16 string;

    27

	uint16 color;

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	struct StringSpriteToDraw *next;

    29

	int32 x;

    30

	int32 y;

    31

	uint32 params[3];

    32

	uint16 width;

    33

} StringSpriteToDraw;

    34

    35

typedef struct TileSpriteToDraw {

    36

	uint32 image;

    37

	struct TileSpriteToDraw *next;

    38

	int32 x;

    39

	int32 y;

    40

	byte z;

    41

} TileSpriteToDraw;

    42

    43

typedef struct ChildScreenSpriteToDraw {

    44

	uint32 image;

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	int32 x;

    46

	int32 y;

    47

	struct ChildScreenSpriteToDraw *next;

    48

} ChildScreenSpriteToDraw;

    49

    50

typedef struct ParentSpriteToDraw {

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	uint32 image;

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	int32 left;

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	int32 top;

    54

	int32 right;

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	int32 bottom;

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	int32 tile_x;

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	int32 tile_y;

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	int32 tile_right;

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	int32 tile_bottom;

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	ChildScreenSpriteToDraw *child;

    61

	byte unk16;

    62

	byte tile_z;

    63

	byte tile_z_bottom;

    64

} ParentSpriteToDraw;

    65

    66

// Quick hack to know how much memory to reserve when allocating from the spritelist

    67

// to prevent a buffer overflow.

    68

#define LARGEST_SPRITELIST_STRUCT ParentSpriteToDraw

    69

    70

typedef struct ViewportDrawer {

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	DrawPixelInfo dpi;

    72

    73

	byte *spritelist_mem;

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	const byte *eof_spritelist_mem;

    75

    76

	StringSpriteToDraw **last_string, *first_string;

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	TileSpriteToDraw **last_tile, *first_tile;

    78

    79

	ChildScreenSpriteToDraw **last_child;

    80

    81

	ParentSpriteToDraw **parent_list;

    82

	ParentSpriteToDraw * const *eof_parent_list;

    83

    84

	byte combine_sprites;

    85

    86

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

    87

	bool ground_child;

    88

} ViewportDrawer;

    89

    90

static ViewportDrawer *_cur_vd;

    91

    92

TileHighlightData _thd;

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static TileInfo *_cur_ti;

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    95

    96

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

    97

{

    98

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

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	p.x -= vp->virtual_width / 2;

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	p.y -= vp->virtual_height / 2;

   101

	return p;

   102

}

   103

   104

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

   105

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

   106

{

   107

	ViewPort *vp;

   108

	Point pt;

   109

	uint32 bit;

   110

   111

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

   112

		assert(vp != endof(_viewports));

   113

		if (vp->width == 0) break;

   114

	}

   115

	_active_viewports |= bit;

   116

   117

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

   118

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

   119

	vp->width = width;

   120

	vp->height = height;

   121

   122

	vp->zoom = zoom;

   123

   124

	vp->virtual_width = width << zoom;

   125

	vp->virtual_height = height << zoom;

   126

   127

	if (follow_flags & 0x80000000) {

   128

		const Vehicle *veh;

   129

   130

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

   131

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

   132

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

   133

	} else {

   134

		uint x = TileX(follow_flags) * 16;

   135

		uint y = TileY(follow_flags) * 16;

   136

   137

		WP(w, vp_d).follow_vehicle = INVALID_VEHICLE;

   138

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

   139

	}

   140

   141

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

   142

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

   143

	w->viewport = vp;

   144

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

   145

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

   146

}

   147

   148

static Point _vp_move_offs;

   149

   150

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

   151

{

   152

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

   153

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

   154

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

   155

				top + height > w->top &&

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

   157

   158

			if (left < w->left) {

   159

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

   160

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

   161

				return;

   162

			}

   163

   164

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

   165

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

   166

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

   167

				return;

   168

			}

   169

   170

			if (top < w->top) {

   171

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

   172

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

   173

				return;

   174

			}

   175

   176

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

   177

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

   178

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

   179

				return;

   180

			}

   181

   182

			return;

   183

		}

   184

	}

   185

   186

	{

   187

		int xo = _vp_move_offs.x;

   188

		int yo = _vp_move_offs.y;

   189

   190

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

   191

			/* fully_outside */

   192

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

   193

			return;

   194

		}

   195

   196

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

   197

   198

		if (xo > 0) {

   199

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

   200

			left += xo;

   201

			width -= xo;

   202

		} else if (xo < 0) {

   203

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

   204

			width += xo;

   205

		}

   206

   207

		if (yo > 0) {

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

   209

		} else if (yo < 0) {

   210

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

   211

		}

   212

	}

   213

}

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   215

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

   216

{

   217

	ViewPort *vp = w->viewport;

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	int old_left = vp->virtual_left;

   219

	int old_top = vp->virtual_top;

   220

	int i;

   221

	int left, top, width, height;

   222

   223

	vp->virtual_left = x;

   224

	vp->virtual_top = y;

   225

   226

	old_left >>= vp->zoom;

   227

	old_top >>= vp->zoom;

   228

	x >>= vp->zoom;

   229

	y >>= vp->zoom;

   230

   231

	old_left -= x;

   232

	old_top -= y;

   233

   234

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

   235

   236

	_vp_move_offs.x = old_left;

   237

	_vp_move_offs.y = old_top;

   238

   239

	left = vp->left;

   240

	top = vp->top;

   241

	width = vp->width;

   242

	height = vp->height;

   243

   244

	if (left < 0) {

   245

		width += left;

   246

		left = 0;

   247

	}

   248

   249

	i = left + width - _screen.width;

   250

	if (i >= 0) width -= i;

   251

   252

	if (width > 0) {

   253

		if (top < 0) {

   254

			height += top;

   255

			top = 0;

   256

		}

   257

   258

		i = top + height - _screen.height;

   259

		if (i >= 0) height -= i;

   260

   261

		if (height > 0) DoSetViewportPosition(w + 1, left, top, width, height);

   262

	}

   263

}

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   265

   266

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

   267

{

   268

	ViewPort *vp = w->viewport;

   269

   270

	if (vp != NULL &&

   271

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

   272

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

   273

		return vp;

   274

   275

	return NULL;

   276

}

   277

   278

static Point TranslateXYToTileCoord(const ViewPort *vp, int x, int y)

   279

{

   280

	int z;

   281

	Point pt;

   282

	int a,b;

   283

   284

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

   285

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

   286

				Point pt = {-1, -1};

   287

				return pt;

   288

	}

   289

   290

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

   291

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

   292

   293

#if !defined(NEW_ROTATION)

   294

	a = y-x;

   295

	b = y+x;

   296

#else

   297

	a = x+y;

   298

	b = x-y;

   299

#endif

   300

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

   301

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

   302

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

   303

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

   304

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

   305

   306

	pt.x = a+z;

   307

	pt.y = b+z;

   308

   309

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

   310

		pt.x = pt.y = -1;

   311

	}

   312

   313

	return pt;

   314

}

   315

   316

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

   317

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

   318

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

   319

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

   320

{

   321

	Window *w;

   322

	ViewPort *vp;

   323

	Point pt;

   324

   325

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

   326

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

   327

				return TranslateXYToTileCoord(vp, zoom_x, zoom_y);

   328

   329

	pt.y = pt.x = -1;

   330

	return pt;

   331

}

   332

   333

Point GetTileBelowCursor(void)

   334

{

   335

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

   336

}

   337

   338

   339

Point GetTileZoomCenterWindow(bool in, Window * w)

   340

{

   341

	int x, y;

   342

	ViewPort * vp;

   343

   344

	vp = w->viewport;

   345

   346

	if (in) {

   347

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

   348

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

   349

	} else {

   350

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

   351

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

   352

	}

   353

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

   354

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

   355

}

   356

   357

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

   358

{

   359

	ViewportDrawer *vd = _cur_vd;

   360

	TileSpriteToDraw *ts;

   361

   362

	assert((image & 0x3FFF) < NUM_SPRITES);

   363

   364

	if (vd->spritelist_mem >= vd->eof_spritelist_mem) {

   365

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

   366

		return;

   367

	}

   368

	ts = (TileSpriteToDraw*)vd->spritelist_mem;

   369

   370

	vd->spritelist_mem += sizeof(TileSpriteToDraw);

   371

   372

	ts->image = image;

   373

	ts->next = NULL;

   374

	ts->x = x;

   375

	ts->y = y;

   376

	ts->z = z;

   377

	*vd->last_tile = ts;

   378

	vd->last_tile = &ts->next;

   379

}

   380

   381

void DrawGroundSprite(uint32 image)

   382

{

   383

	if (_offset_ground_sprites) {

   384

		// offset ground sprite because of foundation?

   385

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

   386

	} else {

   387

		_added_tile_sprite = true;

   388

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

   389

	}

   390

}

   391

   392

   393

void OffsetGroundSprite(int x, int y)

   394

{

   395

	_cur_vd->offs_x = x;

   396

	_cur_vd->offs_y = y;

   397

	_offset_ground_sprites = true;

   398

}

   399

   400

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

   401

{

   402

	const ViewportDrawer *vd = _cur_vd;

   403

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

   404

	const SpriteDimension *sd = GetSpriteDimension(image & 0x3FFF);

   405

   406

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

   407

			pt.x + sd->xoffs + sd->xsize <= vd->dpi.left ||

   408

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

   409

			pt.y + sd->yoffs + sd->ysize <= vd->dpi.top)

   410

		return;

   411

   412

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

   413

}

   414

   415

   416

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

   417

{

   418

	ViewportDrawer *vd = _cur_vd;

   419

	ParentSpriteToDraw *ps;

   420

	const SpriteDimension *sd;

   421

	Point pt;

   422

   423

	assert((image & 0x3FFF) < NUM_SPRITES);

   424

   425

	if (vd->combine_sprites == 2) {

   426

		AddCombinedSprite(image, x, y, z);

   427

		return;

   428

	}

   429

   430

	vd->last_child = NULL;

   431

   432

	if (vd->spritelist_mem >= vd->eof_spritelist_mem) {

   433

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

   434

		return;

   435

	}

   436

	ps = (ParentSpriteToDraw*)vd->spritelist_mem;

   437

   438

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

   439

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

   440

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

   441

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

   442

		//  parent_list somewhere below to a higher number.

   443

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

   444

		//  spots on the screen ;)

   445

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

   446

		return;

   447

	}

   448

   449

	vd->spritelist_mem += sizeof(ParentSpriteToDraw);

   450

   451

	ps->image = image;

   452

	ps->tile_x = x;

   453

	ps->tile_right = x + w - 1;

   454

   455

	ps->tile_y = y;

   456

	ps->tile_bottom = y + h - 1;

   457

   458

	ps->tile_z = z;

   459

	ps->tile_z_bottom = z + dz - 1;

   460

   461

	pt = RemapCoords(x, y, z);

   462

   463

	sd = GetSpriteDimension(image & 0x3FFF);

   464

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

   465

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

   466

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

   467

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

   468

		return;

   469

	}

   470

   471

	ps->unk16 = 0;

   472

	ps->child = NULL;

   473

	vd->last_child = &ps->child;

   474

   475

	*vd->parent_list++ = ps;

   476

   477

	if (vd->combine_sprites == 1) vd->combine_sprites = 2;

   478

}

   479

   480

void StartSpriteCombine(void)

   481

{

   482

	_cur_vd->combine_sprites = 1;

   483

}

   484

   485

void EndSpriteCombine(void)

   486

{

   487

	_cur_vd->combine_sprites = 0;

   488

}

   489

   490

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

   491

{

   492

	ViewportDrawer *vd = _cur_vd;

   493

	ChildScreenSpriteToDraw *cs;

   494

   495

	assert((image & 0x3FFF) < NUM_SPRITES);

   496

   497

	if (vd->spritelist_mem >= vd->eof_spritelist_mem) {

   498

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

   499

		return;

   500

	}

   501

	cs = (ChildScreenSpriteToDraw*)vd->spritelist_mem;

   502

   503

	if (vd->last_child == NULL) return;

   504

   505

	vd->spritelist_mem += sizeof(ChildScreenSpriteToDraw);

   506

   507

	*vd->last_child = cs;

   508

	vd->last_child = &cs->next;

   509

   510

	cs->image = image;