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#include "stdafx.h"

     2

#include "openttd.h"

     3

#include "debug.h"

     4

#include "spritecache.h"

     5

#include "strings.h"

     6

#include "table/sprites.h"

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#include "table/strings.h"

     8

#include "map.h"

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#include "viewport.h"

    10

#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"

    17

    18

#define VIEWPORT_DRAW_MEM (65536 * 2)

    19

    20

static bool _added_tile_sprite;

    21

static bool _offset_ground_sprites;

    22

    23

typedef struct StringSpriteToDraw {

    24

	uint16 string;

    25

	uint16 color;

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	struct StringSpriteToDraw *next;

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	int32 x;

    28

	int32 y;

    29

	uint32 params[3];

    30

	uint16 width;

    31

} StringSpriteToDraw;

    32

    33

typedef struct TileSpriteToDraw {

    34

	uint32 image;

    35

	struct TileSpriteToDraw *next;

    36

	int32 x;

    37

	int32 y;

    38

	byte z;

    39

} TileSpriteToDraw;

    40

    41

typedef struct ChildScreenSpriteToDraw {

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	uint32 image;

    43

	int32 x;

    44

	int32 y;

    45

	struct ChildScreenSpriteToDraw *next;

    46

} ChildScreenSpriteToDraw;

    47

    48

typedef struct ParentSpriteToDraw {

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	uint32 image;

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	int32 left;

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	int32 top;

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	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;

    59

	byte unk16;

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	byte tile_z;

    61

	byte tile_z_bottom;

    62

} ParentSpriteToDraw;

    63

    64

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

    65

// to prevent a buffer overflow.

    66

#define LARGEST_SPRITELIST_STRUCT ParentSpriteToDraw

    67

    68

typedef struct ViewportDrawer {

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	DrawPixelInfo dpi;

    70

    71

	byte *spritelist_mem;

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	const byte *eof_spritelist_mem;

    73

    74

	StringSpriteToDraw **last_string, *first_string;

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	TileSpriteToDraw **last_tile, *first_tile;

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    77

	ChildScreenSpriteToDraw **last_child;

    78

    79

	ParentSpriteToDraw **parent_list;

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	ParentSpriteToDraw * const *eof_parent_list;

    81

    82

	byte combine_sprites;

    83

    84

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

    85

	bool ground_child;

    86

} ViewportDrawer;

    87

    88

static ViewportDrawer *_cur_vd;

    89

    90

TileHighlightData _thd;

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static TileInfo *_cur_ti;

    92

    93

    94

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

    95

{

    96

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

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

    98

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

    99

	return p;

   100

}

   101

   102

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

   103

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

   104

{

   105

	ViewPort *vp;

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	Point pt;

   107

	uint32 bit;

   108

   109

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

   110

		assert(vp != endof(_viewports));

   111

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

   112

	}

   113

	_active_viewports |= bit;

   114

   115

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

   116

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

   117

	vp->width = width;

   118

	vp->height = height;

   119

   120

	vp->zoom = zoom;

   121

   122

	vp->virtual_width = width << zoom;

   123

	vp->virtual_height = height << zoom;

   124

   125

	if (follow_flags & 0x80000000) {

   126

		const Vehicle *veh;

   127

   128

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

   129

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

   130

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

   131

	} else {

   132

		uint x = TileX(follow_flags) * 16;

   133

		uint y = TileY(follow_flags) * 16;

   134

   135

		WP(w, vp_d).follow_vehicle = INVALID_VEHICLE;

   136

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

   137

	}

   138

   139

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

   140

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

   141

	w->viewport = vp;

   142

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

   143

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

   144

}

   145

   146

static Point _vp_move_offs;

   147

   148

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

   149

{

   150

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

   151

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

   152

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

   153

				top + height > w->top &&

   154

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

   155

   156

			if (left < w->left) {

   157

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

   158

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

   159

				return;

   160

			}

   161

   162

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

   163

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

   164

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

   165

				return;

   166

			}

   167

   168

			if (top < w->top) {

   169

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

   170

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

   171

				return;

   172

			}

   173

   174

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

   175

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

   176

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

   177

				return;

   178

			}

   179

   180

			return;

   181

		}

   182

	}

   183

   184

	{

   185

		int xo = _vp_move_offs.x;

   186

		int yo = _vp_move_offs.y;

   187

   188

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

   189

			/* fully_outside */

   190

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

   191

			return;

   192

		}

   193

   194

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

   195

   196

		if (xo > 0) {

   197

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

   198

			left += xo;

   199

			width -= xo;

   200

		} else if (xo < 0) {

   201

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

   202

			width += xo;

   203

		}

   204

   205

		if (yo > 0) {

   206

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

   207

		} else if (yo < 0) {

   208

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

   209

		}

   210

	}

   211

}

   212

   213

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

   214

{

   215

	ViewPort *vp = w->viewport;

   216

	int old_left = vp->virtual_left;

   217

	int old_top = vp->virtual_top;

   218

	int i;

   219

	int left, top, width, height;

   220

   221

	vp->virtual_left = x;

   222

	vp->virtual_top = y;

   223

   224

	old_left >>= vp->zoom;

   225

	old_top >>= vp->zoom;

   226

	x >>= vp->zoom;

   227

	y >>= vp->zoom;

   228

   229

	old_left -= x;

   230

	old_top -= y;

   231

   232

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

   233

   234

	_vp_move_offs.x = old_left;

   235

	_vp_move_offs.y = old_top;

   236

   237

	left = vp->left;

   238

	top = vp->top;

   239

	width = vp->width;

   240

	height = vp->height;

   241

   242

	if (left < 0) {

   243

		width += left;

   244

		left = 0;

   245

	}

   246

   247

	i = left + width - _screen.width;

   248

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

   249

   250

	if (width > 0) {

   251

		if (top < 0) {

   252

			height += top;

   253

			top = 0;

   254

		}

   255

   256

		i = top + height - _screen.height;

   257

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

   258

   259

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

   260

	}

   261

}

   262

   263

   264

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

   265

{

   266

	ViewPort *vp = w->viewport;

   267

   268

	if (vp != NULL &&

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

   270

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

   271

		return vp;

   272

   273

	return NULL;

   274

}

   275

   276

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

   277

{

   278

	int z;

   279

	Point pt;

   280

	int a,b;

   281

   282

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

   283

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

   284

				Point pt = {-1, -1};

   285

				return pt;

   286

	}

   287

   288

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

   289

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

   290

   291

#if !defined(NEW_ROTATION)

   292

	a = y-x;

   293

	b = y+x;

   294

#else

   295

	a = x+y;

   296

	b = x-y;

   297

#endif

   298

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

   299

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

   300

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

   301

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

   302

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

   303

   304

	pt.x = a+z;

   305

	pt.y = b+z;

   306

   307

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

   308

		pt.x = pt.y = -1;

   309

	}

   310

   311

	return pt;

   312

}

   313

   314

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

   315

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

   316

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

   317

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

   318

{

   319

	Window *w;

   320

	ViewPort *vp;

   321

	Point pt;

   322

   323

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

   324

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

   325

				return TranslateXYToTileCoord(vp, zoom_x, zoom_y);

   326

   327

	pt.y = pt.x = -1;

   328

	return pt;

   329

}

   330

   331

Point GetTileBelowCursor(void)

   332

{

   333

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

   334

}

   335

   336

   337

Point GetTileZoomCenterWindow(bool in, Window * w)

   338

{

   339

	int x, y;

   340

	ViewPort * vp;

   341

   342

	vp = w->viewport;

   343

   344

	if (in) {

   345

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

   346

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

   347

	} else {

   348

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

   349

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

   350

	}

   351

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

   352

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

   353

}

   354

   355

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

   356

{

   357

	ViewportDrawer *vd = _cur_vd;

   358

	TileSpriteToDraw *ts;

   359

   360

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

   361

   362

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

   363

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

   364

		return;

   365

	}

   366

	ts = (TileSpriteToDraw*)vd->spritelist_mem;

   367

   368

	vd->spritelist_mem += sizeof(TileSpriteToDraw);

   369

   370

	ts->image = image;

   371

	ts->next = NULL;

   372

	ts->x = x;

   373

	ts->y = y;

   374

	ts->z = z;

   375

	*vd->last_tile = ts;

   376

	vd->last_tile = &ts->next;

   377

}

   378

   379

void DrawGroundSprite(uint32 image)

   380

{

   381

	if (_offset_ground_sprites) {

   382

		// offset ground sprite because of foundation?

   383

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

   384

	} else {

   385

		_added_tile_sprite = true;

   386

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

   387

	}

   388

}

   389

   390

   391

void OffsetGroundSprite(int x, int y)

   392

{

   393

	_cur_vd->offs_x = x;

   394

	_cur_vd->offs_y = y;

   395

	_offset_ground_sprites = true;

   396

}

   397

   398

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

   399

{

   400

	const ViewportDrawer *vd = _cur_vd;

   401

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

   402

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

   403

   404

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

   405

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

   406

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

   407

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

   408

		return;

   409

   410

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

   411

}

   412

   413

   414

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

   415

{

   416

	ViewportDrawer *vd = _cur_vd;

   417

	ParentSpriteToDraw *ps;

   418

	const SpriteDimension *sd;

   419

	Point pt;

   420

   421

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

   422

   423

	if (vd->combine_sprites == 2) {

   424

		AddCombinedSprite(image, x, y, z);

   425

		return;

   426

	}

   427

   428

	vd->last_child = NULL;

   429

   430

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

   431

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

   432

		return;

   433

	}

   434

	ps = (ParentSpriteToDraw*)vd->spritelist_mem;

   435

   436

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

   437

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

   438

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

   439

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

   440

		//  parent_list somewhere below to a higher number.

   441

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

   442

		//  spots on the screen ;)

   443

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

   444

		return;

   445

	}

   446

   447

	vd->spritelist_mem += sizeof(ParentSpriteToDraw);

   448

   449

	ps->image = image;

   450

	ps->tile_x = x;

   451

	ps->tile_right = x + w - 1;

   452

   453

	ps->tile_y = y;

   454

	ps->tile_bottom = y + h - 1;

   455

   456

	ps->tile_z = z;

   457

	ps->tile_z_bottom = z + dz - 1;

   458

   459

	pt = RemapCoords(x, y, z);

   460

   461

	sd = GetSpriteDimension(image & 0x3FFF);

   462

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

   463

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

   464

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

   465

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

   466

		return;

   467

	}

   468

   469

	ps->unk16 = 0;

   470

	ps->child = NULL;

   471

	vd->last_child = &ps->child;

   472

   473

	*vd->parent_list++ = ps;

   474

   475

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

   476

}

   477

   478

void StartSpriteCombine(void)

   479

{

   480

	_cur_vd->combine_sprites = 1;

   481

}

   482

   483

void EndSpriteCombine(void)

   484

{

   485

	_cur_vd->combine_sprites = 0;

   486

}

   487

   488

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

   489

{

   490

	ViewportDrawer *vd = _cur_vd;

   491

	ChildScreenSpriteToDraw *cs;

   492

   493

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

   494

   495

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

   496

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

   497

		return;

   498

	}

   499

	cs = (ChildScreenSpriteToDraw*)vd->spritelist_mem;

   500

   501

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

   502

   503

	vd->spritelist_mem += sizeof(ChildScreenSpriteToDraw);

   504

   505

	*vd->last_child = cs;

   506

	vd->last_child = &cs->next;

   507

   508

	cs->image = image;

   509

	cs->x = x;

   510

	cs->y = y;