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#include "stdafx.h"

     2

#include "ttd.h"

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#include "debug.h"

     5

#include "strings.h"

     6

#include "table/strings.h"

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#include "map.h"

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#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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    16

#define VIEWPORT_DRAW_MEM (65536 * 2)

    17

    18

static bool _added_tile_sprite;

    19

static bool _offset_ground_sprites;

    20

    21

typedef struct StringSpriteToDraw {

    22

	uint16 string;

    23

	uint16 color;

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	struct StringSpriteToDraw *next;

    25

	int32 x;

    26

	int32 y;

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	uint32 params[3];

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	uint16 width;

    29

} StringSpriteToDraw;

    30

    31

typedef struct TileSpriteToDraw {

    32

	uint32 image;

    33

	struct TileSpriteToDraw *next;

    34

	int32 x;

    35

	int32 y;

    36

	byte z;

    37

} TileSpriteToDraw;

    38

    39

typedef struct ChildScreenSpriteToDraw {

    40

	uint32 image;

    41

	int32 x;

    42

	int32 y;

    43

	struct ChildScreenSpriteToDraw *next;

    44

} ChildScreenSpriteToDraw;

    45

    46

typedef struct ParentSpriteToDraw {

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	uint32 image;

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	int32 left;

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	int32 top;

    50

	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;

    58

	byte tile_z;

    59

	byte tile_z_bottom;

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} ParentSpriteToDraw;

    61

    62

typedef struct ViewportDrawer {

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	DrawPixelInfo dpi;

    64

    65

	byte *spritelist_mem, *eof_spritelist_mem;

    66

    67

	StringSpriteToDraw **last_string, *first_string;

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	TileSpriteToDraw **last_tile, *first_tile;

    69

    70

	ChildScreenSpriteToDraw **last_child;

    71

    72

	ParentSpriteToDraw **parent_list;

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	ParentSpriteToDraw **eof_parent_list;

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    75

	byte combine_sprites;

    76

    77

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

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	bool ground_child;

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} ViewportDrawer;

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    81

static ViewportDrawer *_cur_vd;

    82

    83

TileHighlightData * const _thd_ptr = &_thd;

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static TileInfo *_cur_ti;

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    86

    87

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

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{

    89

	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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}

    94

    95

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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{

    98

	ViewPort *vp;

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	Point pt;

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	byte z;

   101

	uint32 bit;

   102

   103

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

   104

		assert(vp!=endof(_viewports));

   105

		if (vp->width == 0)

   106

			break;

   107

	}

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	_active_viewports |= bit;

   109

   110

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

   111

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

   112

	vp->width = width;

   113

	vp->height = height;

   114

   115

	vp->zoom = zoom;

   116

   117

	vp->virtual_width = width << zoom;

   118

	vp->virtual_height = height << zoom;

   119

   120

	if (follow_flags & 0x80000000) {

   121

		Vehicle *veh;

   122

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

   123

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

   124

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

   125

	} else {

   126

		int x = TileX(follow_flags) * 16;

   127

		int y = TileY(follow_flags) * 16;

   128

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

   129

		z = GetSlopeZ(x,y);

   130

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

   131

	}

   132

   133

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

   134

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

   135

	w->viewport = vp;

   136

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

   137

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

   138

}

   139

   140

static Point _vp_move_offs;

   141

   142

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

   143

{

   144

	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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   150

			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;

   154

			}

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   156

			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;

   160

			}

   161

   162

			if (top < w->top) {

   163

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

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

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				return;

   166

			}

   167

   168

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

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

   170

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

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				return;

   172

			}

   173

   174

			return;

   175

		}

   176

	}

   177

   178

	{

   179

		int xo = _vp_move_offs.x;

   180

		int yo = _vp_move_offs.y;

   181

   182

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

   183

			/* fully_outside */

   184

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

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			return;

   186

		}

   187

   188

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

   189

   190

		if (xo > 0) {

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

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			left += xo;

   193

			width -= xo;

   194

		} else if (xo < 0) {

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

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			width += xo;

   197

		}

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   199

		if (yo > 0) {

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

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		} else if (yo < 0) {

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

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		}

   204

	}

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}

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   207

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

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{

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	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;

   213

	int left, top, width, height;

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   215

	vp->virtual_left = x;

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	vp->virtual_top = y;

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   218

	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;

   222

   223

	old_left -= x;

   224

	old_top -= y;

   225

   226

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

   227

		return;

   228

   229

	_vp_move_offs.x = old_left;

   230

	_vp_move_offs.y = old_top;

   231

   232

	left = vp->left;

   233

	top = vp->top;

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	width = vp->width;

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	height = vp->height;

   236

   237

	if (left < 0) {

   238

		width += left;

   239

		left = 0;

   240

	}

   241

   242

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

   243

		width -= i;

   244

   245

	if (width > 0) {

   246

		if (top < 0) {

   247

			height += top;

   248

			top = 0;

   249

		}

   250

   251

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

   252

			height -= i;

   253

		}

   254

   255

		if (height > 0)

   256

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

   257

	}

   258

}

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   260

   261

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

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{

   263

	ViewPort *vp = w->viewport;

   264

	if (vp != NULL &&

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

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

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		return vp;

   268

   269

	return NULL;

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}

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   272

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

   273

{

   274

	int z;

   275

	Point pt;

   276

	int a,b;

   277

   278

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

   279

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

   280

				Point pt = {-1, -1};

   281

				return pt;

   282

	}

   283

   284

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

   285

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

   286

   287

#if !defined(NEW_ROTATION)

   288

	a = y-x;

   289

	b = y+x;

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#else

   291

	a = x+y;

   292

	b = x-y;

   293

#endif

   294

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

   295

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

   296

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

   297

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

   298

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

   299

   300

	pt.x = a+z;

   301

	pt.y = b+z;

   302

   303

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

   304

		pt.x = pt.y = -1;

   305

	}

   306

   307

	return pt;

   308

}

   309

   310

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

   311

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

   312

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

   313

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

   314

{

   315

	Window *w;

   316

	ViewPort *vp;

   317

	Point pt;

   318

   319

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

   320

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

   321

				return TranslateXYToTileCoord(vp, zoom_x, zoom_y);

   322

   323

	pt.y = pt.x = -1;

   324

	return pt;

   325

}

   326

   327

Point GetTileBelowCursor(void)

   328

{

   329

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

   330

}

   331

   332

   333

Point GetTileZoomCenterWindow(bool in, Window * w)

   334

{

   335

	int x, y;

   336

	ViewPort * vp;

   337

   338

	vp = w->viewport;

   339

   340

	if (in)	{

   341

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

   342

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

   343

	}

   344

	else {

   345

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

   346

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

   347

	}

   348

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

   349

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

   350

}

   351

   352

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

   353

{

   354

	ViewportDrawer *vd = _cur_vd;

   355

	TileSpriteToDraw *ts;

   356

   357

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

   358

   359

	ts = (TileSpriteToDraw*)vd->spritelist_mem;

   360

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

   361

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

   362

		return;

   363

	}

   364

   365

	vd->spritelist_mem += sizeof(TileSpriteToDraw);

   366

   367

	ts->image = image;

   368

	ts->next = NULL;

   369

	ts->x = x;

   370

	ts->y = y;

   371

	ts->z = z;

   372

	*vd->last_tile = ts;

   373

	vd->last_tile = &ts->next;

   374

}

   375

   376

void DrawGroundSprite(uint32 image)

   377

{

   378

	if (_offset_ground_sprites) {

   379

		// offset ground sprite because of foundation?

   380

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

   381

	} else {

   382

		_added_tile_sprite = true;

   383

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

   384

	}

   385

}

   386

   387

   388

void OffsetGroundSprite(int x, int y)

   389

{

   390

	_cur_vd->offs_x = x;

   391

	_cur_vd->offs_y = y;

   392

	_offset_ground_sprites = true;

   393

}

   394

   395

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

   396

{

   397

	ViewportDrawer *vd = _cur_vd;

   398

	int t;

   399

	uint32 image_org = image;

   400

	const SpriteDimension *sd;

   401

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

   402

   403

	sd = GetSpriteDimension(image & 0x3FFF);

   404

   405

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

   406

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

   407

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

   408

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

   409

		return;

   410

   411

	AddChildSpriteScreen(image_org, 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

	ps = (ParentSpriteToDraw*)vd->spritelist_mem;

   432

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

   433

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

   434

		return;

   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)\n");

   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) {

   476

		vd->combine_sprites = 2;

   477

	}

   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

	cs = (ChildScreenSpriteToDraw*) vd->spritelist_mem;

   498

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

   499

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

   500

		return;

   501

	}

   502

   503

	if (vd->last_child == NULL)

   504

		return;

   505

   506

	vd->spritelist_mem += sizeof(ChildScreenSpriteToDraw);

   507

   508

	*vd->last_child = cs;

   509

	vd->last_child = &cs->next;

   510

   511

	cs->image = image;

   512

	cs->x = x;

   513

	cs->y = y;

   514

	cs->next = NULL;

   515

}

   516

   517

/* Returns a StringSpriteToDraw */

   518

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