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#include "stdafx.h"

     2

#include "ttd.h"

     3

#include "table/strings.h"

     4

#include "map.h"

     5

#include "viewport.h"

     6

#include "window.h"

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#include "vehicle.h"

     8

#include "station.h"

     9

#include "gfx.h"

    10

#include "town.h"

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    12

#define VIEWPORT_DRAW_MEM (65536 * 2)

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    14

static bool _added_tile_sprite;

    15

static bool _offset_ground_sprites;

    16

    17

typedef struct StringSpriteToDraw {

    18

	uint16 string;

    19

	uint16 color;

    20

	struct StringSpriteToDraw *next;

    21

	int32 x;

    22

	int32 y;

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	uint32 params[3];

    24

	uint16 width;

    25

} StringSpriteToDraw;

    26

    27

typedef struct TileSpriteToDraw {

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	uint32 image;

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	struct TileSpriteToDraw *next;

    30

	int32 x;

    31

	int32 y;

    32

	byte z;

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} TileSpriteToDraw;

    34

    35

typedef struct ChildScreenSpriteToDraw {

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	uint32 image;

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	int32 x;

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	int32 y;

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	struct ChildScreenSpriteToDraw *next;

    40

} ChildScreenSpriteToDraw;

    41

    42

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;

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	byte unk16;

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	byte tile_z;

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	byte tile_z_bottom;

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} ParentSpriteToDraw;

    57

    58

typedef struct ViewportDrawer {

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	DrawPixelInfo dpi;

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    61

	byte *spritelist_mem, *eof_spritelist_mem;

    62

    63

	StringSpriteToDraw **last_string, *first_string;

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	TileSpriteToDraw **last_tile, *first_tile;

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    66

	ChildScreenSpriteToDraw **last_child;

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    68

	ParentSpriteToDraw **parent_list;

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	ParentSpriteToDraw **eof_parent_list;

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    71

	byte combine_sprites;

    72

    73

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

    74

	bool ground_child;

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} ViewportDrawer;

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    77

static ViewportDrawer *_cur_vd;

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    79

TileHighlightData * const _thd_ptr = &_thd;

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static TileInfo *_cur_ti;

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    82

    83

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

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{

    85

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

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

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

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	return p;

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}

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    91

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

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

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{

    94

	ViewPort *vp;

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	Point pt;

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	byte z;

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	uint32 bit;

    98

    99

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

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		assert(vp!=endof(_viewports));

   101

		if (vp->width == 0)

   102

			break;

   103

	}

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	_active_viewports |= bit;

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   106

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

   107

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

   108

	vp->width = width;

   109

	vp->height = height;

   110

   111

	vp->zoom = zoom;

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   113

	vp->virtual_width = width << zoom;

   114

	vp->virtual_height = height << zoom;

   115

   116

	if (follow_flags & 0x80000000) {

   117

		Vehicle *veh;

   118

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

   119

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

   120

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

   121

	} else {

   122

		int x = TileX(follow_flags) * 16;

   123

		int y = TileY(follow_flags) * 16;

   124

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

   125

		z = GetSlopeZ(x,y);

   126

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

   127

	}

   128

   129

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

   130

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

   131

	w->viewport = vp;

   132

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

   133

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

   134

}

   135

   136

static Point _vp_move_offs;

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   138

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

   139

{

   140

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

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

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

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				top + height > w->top &&

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

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   146

			if (left < w->left) {

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

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

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				return;

   150

			}

   151

   152

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

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

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

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				return;

   156

			}

   157

   158

			if (top < w->top) {

   159

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

   160

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

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				return;

   162

			}

   163

   164

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

   165

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

   166

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

   167

				return;

   168

			}

   169

   170

			return;

   171

		}

   172

	}

   173

   174

	{

   175

		int xo = _vp_move_offs.x;

   176

		int yo = _vp_move_offs.y;

   177

   178

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

   179

			/* fully_outside */

   180

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

   181

			return;

   182

		}

   183

   184

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

   185

   186

		if (xo > 0) {

   187

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

   188

			left += xo;

   189

			width -= xo;

   190

		} else if (xo < 0) {

   191

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

   192

			width += xo;

   193

		}

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   195

		if (yo > 0) {

   196

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

   197

		} else if (yo < 0) {

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

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		}

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	}

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}

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   203

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

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{

   205

	ViewPort *vp = w->viewport;

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	int old_left = vp->virtual_left;

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	int old_top = vp->virtual_top;

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	int i;

   209

	int left, top, width, height;

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   211

	vp->virtual_left = x;

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	vp->virtual_top = y;

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   214

	old_left >>= vp->zoom;

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	old_top >>= vp->zoom;

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	x >>= vp->zoom;

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	y >>= vp->zoom;

   218

   219

	old_left -= x;

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	old_top -= y;

   221

   222

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

   223

		return;

   224

   225

	_vp_move_offs.x = old_left;

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	_vp_move_offs.y = old_top;

   227

   228

	left = vp->left;

   229

	top = vp->top;

   230

	width = vp->width;

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	height = vp->height;

   232

   233

	if (left < 0) {

   234

		width += left;

   235

		left = 0;

   236

	}

   237

   238

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

   239

		width -= i;

   240

   241

	if (width > 0) {

   242

		if (top < 0) {

   243

			height += top;

   244

			top = 0;

   245

		}

   246

   247

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

   248

			height -= i;

   249

		}

   250

   251

		if (height > 0)

   252

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

   253

	}

   254

}

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   256

   257

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

   258

{

   259

	ViewPort *vp = w->viewport;

   260

	if (vp != NULL &&

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

   262

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

   263

		return vp;

   264

   265

	return NULL;

   266

}

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   268

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

   269

	int z;

   270

	Point pt;

   271

	int a,b;

   272

   273

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

   274

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

   275

				Point pt = {-1, -1};

   276

				return pt;

   277

	}

   278

   279

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

   280

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

   281

   282

#if !defined(NEW_ROTATION)

   283

	a = y-x;

   284

	b = y+x;

   285

#else

   286

	a = x+y;

   287

	b = x-y;

   288

#endif

   289

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

   290

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

   295

	pt.x = a+z;

   296

	pt.y = b+z;

   297

   298

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

   299

		pt.x = pt.y = -1;

   300

	}

   301

   302

	return pt;

   303

}

   304

   305

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

   306

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

   307

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

   308

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

   309

{

   310

	Window *w;

   311

	ViewPort *vp;

   312

	Point pt;

   313

   314

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

   315

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

   316

				return TranslateXYToTileCoord(vp, zoom_x, zoom_y);

   317

   318

	pt.y = pt.x = -1;

   319

	return pt;

   320

}

   321

   322

Point GetTileBelowCursor()

   323

{

   324

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

   325

}

   326

   327

   328

Point GetTileZoomCenterWindow(bool in, Window * w)

   329

{

   330

	int x, y;

   331

	ViewPort * vp;

   332

   333

	vp = w->viewport;

   334

   335

	if (in)	{

   336

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

   337

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

   338

	}

   339

	else {

   340

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

   341

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

   342

	}

   343

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

   344

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

   345

}

   346

   347

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

   348

{

   349

	ViewportDrawer *vd = _cur_vd;

   350

	TileSpriteToDraw *ts;

   351

   352

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

   353

   354

	ts = (TileSpriteToDraw*)vd->spritelist_mem;

   355

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

   356

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

   357

		return;

   358

	}

   359

   360

	vd->spritelist_mem += sizeof(TileSpriteToDraw);

   361

   362

	ts->image = image;

   363

	ts->next = NULL;

   364

	ts->x = x;

   365

	ts->y = y;

   366

	ts->z = z;

   367

	*vd->last_tile = ts;

   368

	vd->last_tile = &ts->next;

   369

}

   370

   371

void DrawGroundSprite(uint32 image)

   372

{

   373

	if (_offset_ground_sprites) {

   374

		// offset ground sprite because of foundation?

   375

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

   376

	} else {

   377

			_added_tile_sprite = true;

   378

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

   379

	}

   380

}

   381

   382

   383

void OffsetGroundSprite(int x, int y)

   384

{

   385

	_cur_vd->offs_x = x;

   386

	_cur_vd->offs_y = y;

   387

	_offset_ground_sprites = true;

   388

}

   389

   390

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

   391

{

   392

	ViewportDrawer *vd = _cur_vd;

   393

	int t;

   394

	uint32 image_org = image;

   395

	const SpriteDimension *sd;

   396

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

   397

   398

	sd = GetSpriteDimension(image & 0x3FFF);

   399

   400

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

   401

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

   402

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

   403

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

   404

		return;

   405

   406

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

   407

}

   408

   409

   410

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

   411

{

   412

	ViewportDrawer *vd = _cur_vd;

   413

	ParentSpriteToDraw *ps;

   414

	const SpriteDimension *sd;

   415

	Point pt;

   416

   417

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

   418

   419

	if (vd->combine_sprites == 2) {

   420

		AddCombinedSprite(image, x, y, z);

   421

		return;

   422

	}

   423

   424

	vd->last_child = NULL;

   425

   426

	ps = (ParentSpriteToDraw*)vd->spritelist_mem;

   427

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

   428

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

   429

		return;

   430

	}

   431

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

   432

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

   433

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

   434

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

   435

		//  parent_list somewhere below to a higher number.

   436

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

   437

		//  spots on the screen ;)

   438

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

   439

		return;

   440

	}

   441

   442

	vd->spritelist_mem += sizeof(ParentSpriteToDraw);

   443

   444

	ps->image = image;

   445

	ps->tile_x = x;

   446

	ps->tile_right = x + w - 1;

   447

   448

	ps->tile_y = y;

   449

	ps->tile_bottom = y + h - 1;

   450

   451

	ps->tile_z = z;

   452

	ps->tile_z_bottom = z + dz - 1;

   453

   454

	pt = RemapCoords(x, y, z);

   455

   456

	sd = GetSpriteDimension(image & 0x3FFF);

   457

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

   458

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

   459

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

   460

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

   461

		return;

   462

	}

   463

   464

	ps->unk16 = 0;

   465

	ps->child = NULL;

   466

	vd->last_child = &ps->child;

   467

   468

	*vd->parent_list++ = ps;

   469

   470

	if (vd->combine_sprites == 1) {

   471

		vd->combine_sprites = 2;

   472

	}

   473

}

   474

   475

void StartSpriteCombine()

   476

{

   477

	_cur_vd->combine_sprites = 1;

   478

}

   479

   480

void EndSpriteCombine()

   481

{

   482

	_cur_vd->combine_sprites = 0;

   483

}

   484

   485

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

   486

{

   487

	ViewportDrawer *vd = _cur_vd;

   488

	ChildScreenSpriteToDraw *cs;

   489

   490

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

   491

   492

	cs = (ChildScreenSpriteToDraw*) vd->spritelist_mem;

   493

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

   494

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

   495

		return;

   496

	}

   497

   498

	if (vd->last_child == NULL)

   499

		return;

   500

   501

	vd->spritelist_mem += sizeof(ChildScreenSpriteToDraw);

   502

   503

	*vd->last_child = cs;

   504

	vd->last_child = &cs->next;

   505

   506

	cs->image = image;

   507

	cs->x = x;

   508

	cs->y = y;

   509

	cs->next = NULL;

   510

}

   511

   512

/* Returns a StringSpriteToDraw */

   513

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

   514

{

   515

	ViewportDrawer *vd = _cur_vd;

   516

	StringSpriteToDraw *ss;

   517

   518

	ss = (StringSpriteToDraw*)vd->spritelist_mem;

   519

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