1

#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"

    18

    19

#define VIEWPORT_DRAW_MEM (65536 * 2)

    20

    21

static bool _added_tile_sprite;

    22

static bool _offset_ground_sprites;

    23

    24

typedef struct StringSpriteToDraw {

    25

	uint16 string;

    26

	uint16 color;

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	struct StringSpriteToDraw *next;

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	int32 x;

    29

	int32 y;

    30

	uint32 params[3];

    31

	uint16 width;

    32

} StringSpriteToDraw;

    33

    34

typedef struct TileSpriteToDraw {

    35

	uint32 image;

    36

	struct TileSpriteToDraw *next;

    37

	int32 x;

    38

	int32 y;

    39

	byte z;

    40

} TileSpriteToDraw;

    41

    42

typedef struct ChildScreenSpriteToDraw {

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	uint32 image;

    44

	int32 x;

    45

	int32 y;

    46

	struct ChildScreenSpriteToDraw *next;

    47

} ChildScreenSpriteToDraw;

    48

    49

typedef struct ParentSpriteToDraw {

    50

	uint32 image;

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	int32 left;

    52

	int32 top;

    53

	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;

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	byte unk16;

    61

	byte tile_z;

    62

	byte tile_z_bottom;

    63

} ParentSpriteToDraw;

    64

    65

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

    66

// to prevent a buffer overflow.

    67

#define LARGEST_SPRITELIST_STRUCT ParentSpriteToDraw

    68

    69

typedef struct ViewportDrawer {

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	DrawPixelInfo dpi;

    71

    72

	byte *spritelist_mem;

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	const byte *eof_spritelist_mem;

    74

    75

	StringSpriteToDraw **last_string, *first_string;

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	TileSpriteToDraw **last_tile, *first_tile;

    77

    78

	ChildScreenSpriteToDraw **last_child;

    79

    80

	ParentSpriteToDraw **parent_list;

    81

	ParentSpriteToDraw * const *eof_parent_list;

    82

    83

	byte combine_sprites;

    84

    85

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

    86

	bool ground_child;

    87

} ViewportDrawer;

    88

    89

static ViewportDrawer *_cur_vd;

    90

    91

TileHighlightData _thd;

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static TileInfo *_cur_ti;

    93

    94

    95

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

    96

{

    97

	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;

   100

	return p;

   101

}

   102

   103

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

   104

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

   105

{

   106

	ViewPort *vp;

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	Point pt;

   108

	uint32 bit;

   109

   110

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

   111

		assert(vp != endof(_viewports));

   112

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

   113

	}

   114

	_active_viewports |= bit;

   115

   116

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

   117

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

   118

	vp->width = width;

   119

	vp->height = height;

   120

   121

	vp->zoom = zoom;

   122

   123

	vp->virtual_width = width << zoom;

   124

	vp->virtual_height = height << zoom;

   125

   126

	if (follow_flags & 0x80000000) {

   127

		const Vehicle *veh;

   128

   129

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

   130

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

   131

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

   132

	} else {

   133

		uint x = TileX(follow_flags) * 16;

   134

		uint y = TileY(follow_flags) * 16;

   135

   136

		WP(w, vp_d).follow_vehicle = INVALID_VEHICLE;

   137

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

   138

	}

   139

   140

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

   141

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

   142

	w->viewport = vp;

   143

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

   144

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

   145

}

   146

   147

static Point _vp_move_offs;

   148

   149

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

   150

{

   151

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

   152

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

   153

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

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				top + height > w->top &&

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

   156

   157

			if (left < w->left) {

   158

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

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

   160

				return;

   161

			}

   162

   163

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

   164

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

   165

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

   166

				return;

   167

			}

   168

   169

			if (top < w->top) {

   170

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

   171

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

   172

				return;

   173

			}

   174

   175

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

   176

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

   177

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

   178

				return;

   179

			}

   180

   181

			return;

   182

		}

   183

	}

   184

   185

	{

   186

		int xo = _vp_move_offs.x;

   187

		int yo = _vp_move_offs.y;

   188

   189

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

   190

			/* fully_outside */

   191

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

   192

			return;

   193

		}

   194

   195

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

   196

   197

		if (xo > 0) {

   198

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

   199

			left += xo;

   200

			width -= xo;

   201

		} else if (xo < 0) {

   202

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

   203

			width += xo;

   204

		}

   205

   206

		if (yo > 0) {

   207

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

   208

		} else if (yo < 0) {

   209

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

   210

		}

   211

	}

   212

}

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   214

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

   215

{

   216

	ViewPort *vp = w->viewport;

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	int old_left = vp->virtual_left;

   218

	int old_top = vp->virtual_top;

   219

	int i;

   220

	int left, top, width, height;

   221

   222

	vp->virtual_left = x;

   223

	vp->virtual_top = y;

   224

   225

	old_left >>= vp->zoom;

   226

	old_top >>= vp->zoom;

   227

	x >>= vp->zoom;

   228

	y >>= vp->zoom;

   229

   230

	old_left -= x;

   231

	old_top -= y;

   232

   233

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

   234

   235

	_vp_move_offs.x = old_left;

   236

	_vp_move_offs.y = old_top;

   237

   238

	left = vp->left;

   239

	top = vp->top;

   240

	width = vp->width;

   241

	height = vp->height;

   242

   243

	if (left < 0) {

   244

		width += left;

   245

		left = 0;

   246

	}

   247

   248

	i = left + width - _screen.width;

   249

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

   250

   251

	if (width > 0) {

   252

		if (top < 0) {

   253

			height += top;

   254

			top = 0;

   255

		}

   256

   257

		i = top + height - _screen.height;

   258

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

   259

   260

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

   261

	}

   262

}

   263

   264

   265

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

   266

{

   267

	ViewPort *vp = w->viewport;

   268

   269

	if (vp != NULL &&

   270

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

   271

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

   272

		return vp;

   273

   274

	return NULL;

   275

}

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   277

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

   278

{

   279

	int z;

   280

	Point pt;

   281

	int a,b;

   282

   283

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

   284

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

   285

				Point pt = {-1, -1};

   286

				return pt;

   287

	}

   288

   289

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

   290

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

   291

   292

#if !defined(NEW_ROTATION)

   293

	a = y-x;

   294

	b = y+x;

   295

#else

   296

	a = x+y;

   297

	b = x-y;

   298

#endif

   299

	z = GetSlopeZ(a, b) >> 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

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

   304

   305

	pt.x = a+z;

   306

	pt.y = b+z;

   307

   308

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

   309

		pt.x = pt.y = -1;

   310

	}

   311

   312

	return pt;

   313

}

   314

   315

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

   316

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

   317

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

   318

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

   319

{

   320

	Window *w;

   321

	ViewPort *vp;

   322

	Point pt;

   323

   324

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

   325

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

   326

				return TranslateXYToTileCoord(vp, zoom_x, zoom_y);

   327

   328

	pt.y = pt.x = -1;

   329

	return pt;

   330

}

   331

   332

Point GetTileBelowCursor(void)

   333

{

   334

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

   335

}

   336

   337

   338

Point GetTileZoomCenterWindow(bool in, Window * w)

   339

{

   340

	int x, y;

   341

	ViewPort * vp;

   342

   343

	vp = w->viewport;

   344

   345

	if (in) {

   346

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

   347

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

   348

	} else {

   349

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

   350

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

   351

	}

   352

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

   353

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

   354

}

   355

   356

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

   357

{

   358

	ViewportDrawer *vd = _cur_vd;

   359

	TileSpriteToDraw *ts;

   360

   361

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

   362

   363

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

   364

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

   365

		return;

   366

	}

   367

	ts = (TileSpriteToDraw*)vd->spritelist_mem;

   368

   369

	vd->spritelist_mem += sizeof(TileSpriteToDraw);

   370

   371

	ts->image = image;

   372

	ts->next = NULL;

   373

	ts->x = x;

   374

	ts->y = y;

   375

	ts->z = z;

   376

	*vd->last_tile = ts;

   377

	vd->last_tile = &ts->next;

   378

}

   379

   380

void DrawGroundSprite(uint32 image)

   381

{

   382

	if (_offset_ground_sprites) {

   383

		// offset ground sprite because of foundation?

   384

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

   385

	} else {

   386

		_added_tile_sprite = true;

   387

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

   388

	}

   389

}

   390

   391

   392

void OffsetGroundSprite(int x, int y)

   393

{

   394

	_cur_vd->offs_x = x;

   395

	_cur_vd->offs_y = y;

   396

	_offset_ground_sprites = true;

   397

}

   398

   399

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

   400

{

   401

	const ViewportDrawer *vd = _cur_vd;

   402

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

   403

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

   404

   405

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

   406

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

   407

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

   408

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

   409

		return;

   410

   411

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

   412

}

   413

   414

   415

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

   416

{

   417

	ViewportDrawer *vd = _cur_vd;

   418

	ParentSpriteToDraw *ps;

   419

	const SpriteDimension *sd;

   420

	Point pt;

   421

   422

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

   423

   424

	if (vd->combine_sprites == 2) {

   425

		AddCombinedSprite(image, x, y, z);

   426

		return;

   427

	}

   428

   429

	vd->last_child = NULL;

   430

   431

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

   432

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

   433

		return;

   434

	}

   435

	ps = (ParentSpriteToDraw*)vd->spritelist_mem;

   436

   437

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

   438

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

   439

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

   440

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

   441

		//  parent_list somewhere below to a higher number.

   442

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

   443

		//  spots on the screen ;)

   444

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

   445

		return;

   446

	}

   447

   448

	vd->spritelist_mem += sizeof(ParentSpriteToDraw);

   449

   450

	ps->image = image;

   451

	ps->tile_x = x;

   452

	ps->tile_right = x + w - 1;

   453

   454

	ps->tile_y = y;

   455

	ps->tile_bottom = y + h - 1;

   456

   457

	ps->tile_z = z;

   458

	ps->tile_z_bottom = z + dz - 1;

   459

   460

	pt = RemapCoords(x, y, z);

   461

   462

	sd = GetSpriteDimension(image & 0x3FFF);

   463

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

   464

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

   465

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

   466

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

   467

		return;

   468

	}

   469

   470

	ps->unk16 = 0;

   471

	ps->child = NULL;

   472

	vd->last_child = &ps->child;

   473

   474

	*vd->parent_list++ = ps;

   475

   476

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

   477

}

   478

   479

void StartSpriteCombine(void)

   480

{

   481

	_cur_vd->combine_sprites = 1;

   482

}

   483

   484

void EndSpriteCombine(void)

   485

{

   486

	_cur_vd->combine_sprites = 0;

   487

}

   488

   489

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

   490

{

   491

	ViewportDrawer *vd = _cur_vd;

   492

	ChildScreenSpriteToDraw *cs;

   493

   494

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

   495

   496

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

   497

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

   498

		return;

   499

	}

   500

	cs = (ChildScreenSpriteToDraw*)vd->spritelist_mem;

   501

   502

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

   503

   504

	vd->spritelist_mem += sizeof(ChildScreenSpriteToDraw);

   505

   506

	*vd->last_child = cs;

   507

	vd->last_child = &cs->next;

   508

   509

	cs->image = image;

   510

	cs->x = x;