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#include "stdafx.h"

     2

#include "ttd.h"

     4

#include "table/strings.h"

     5

#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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    14

#define VIEWPORT_DRAW_MEM (65536 * 2)

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    16

static bool _added_tile_sprite;

    17

static bool _offset_ground_sprites;

    18

    19

typedef struct StringSpriteToDraw {

    20

	uint16 string;

    21

	uint16 color;

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	struct StringSpriteToDraw *next;

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	int32 x;

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	int32 y;

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	uint32 params[3];

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	uint16 width;

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} StringSpriteToDraw;

    28

    29

typedef struct TileSpriteToDraw {

    30

	uint32 image;

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	struct TileSpriteToDraw *next;

    32

	int32 x;

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	int32 y;

    34

	byte z;

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} TileSpriteToDraw;

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    37

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;

    42

} ChildScreenSpriteToDraw;

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    44

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;

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    60

typedef struct ViewportDrawer {

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	DrawPixelInfo dpi;

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    63

	byte *spritelist_mem, *eof_spritelist_mem;

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    65

	StringSpriteToDraw **last_string, *first_string;

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	TileSpriteToDraw **last_tile, *first_tile;

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    68

	ChildScreenSpriteToDraw **last_child;

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    70

	ParentSpriteToDraw **parent_list;

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	ParentSpriteToDraw **eof_parent_list;

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    73

	byte combine_sprites;

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    75

	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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    79

static ViewportDrawer *_cur_vd;

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    81

TileHighlightData * const _thd_ptr = &_thd;

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static TileInfo *_cur_ti;

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    84

    85

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

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{

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	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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    93

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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{

    96

	ViewPort *vp;

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	Point pt;

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	byte z;

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	uint32 bit;

   100

   101

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

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		assert(vp!=endof(_viewports));

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		if (vp->width == 0)

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			break;

   105

	}

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	_active_viewports |= bit;

   107

   108

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

   109

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

   110

	vp->width = width;

   111

	vp->height = height;

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   113

	vp->zoom = zoom;

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   115

	vp->virtual_width = width << zoom;

   116

	vp->virtual_height = height << zoom;

   117

   118

	if (follow_flags & 0x80000000) {

   119

		Vehicle *veh;

   120

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

   121

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

   122

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

   123

	} else {

   124

		int x = TileX(follow_flags) * 16;

   125

		int y = TileY(follow_flags) * 16;

   126

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

   127

		z = GetSlopeZ(x,y);

   128

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

   129

	}

   130

   131

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

   132

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

   133

	w->viewport = vp;

   134

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

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

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}

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   138

static Point _vp_move_offs;

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   140

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

   141

{

   142

	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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   148

			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;

   152

			}

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   154

			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;

   158

			}

   159

   160

			if (top < w->top) {

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

   162

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

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				return;

   164

			}

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   166

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

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

   168

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

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				return;

   170

			}

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   172

			return;

   173

		}

   174

	}

   175

   176

	{

   177

		int xo = _vp_move_offs.x;

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		int yo = _vp_move_offs.y;

   179

   180

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

   181

			/* fully_outside */

   182

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

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			return;

   184

		}

   185

   186

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

   187

   188

		if (xo > 0) {

   189

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

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			left += xo;

   191

			width -= xo;

   192

		} else if (xo < 0) {

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

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			width += xo;

   195

		}

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   197

		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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		}

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	}

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}

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   205

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

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{

   207

	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;

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	int left, top, width, height;

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   213

	vp->virtual_left = x;

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	vp->virtual_top = y;

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   216

	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;

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   221

	old_left -= x;

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	old_top -= y;

   223

   224

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

   225

		return;

   226

   227

	_vp_move_offs.x = old_left;

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	_vp_move_offs.y = old_top;

   229

   230

	left = vp->left;

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	top = vp->top;

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	width = vp->width;

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	height = vp->height;

   234

   235

	if (left < 0) {

   236

		width += left;

   237

		left = 0;

   238

	}

   239

   240

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

   241

		width -= i;

   242

   243

	if (width > 0) {

   244

		if (top < 0) {

   245

			height += top;

   246

			top = 0;

   247

		}

   248

   249

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

   250

			height -= i;

   251

		}

   252

   253

		if (height > 0)

   254

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

   255

	}

   256

}

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   258

   259

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

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{

   261

	ViewPort *vp = w->viewport;

   262

	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;

   266

   267

	return NULL;

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}

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   270

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

   271

{

   272

	int z;

   273

	Point pt;

   274

	int a,b;

   275

   276

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

   277

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

   278

				Point pt = {-1, -1};

   279

				return pt;

   280

	}

   281

   282

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

   283

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

   284

   285

#if !defined(NEW_ROTATION)

   286

	a = y-x;

   287

	b = y+x;

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#else

   289

	a = x+y;

   290

	b = x-y;

   291

#endif

   292

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

   293

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

   294

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

   295

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

   296

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

   297

   298

	pt.x = a+z;

   299

	pt.y = b+z;

   300

   301

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

   302

		pt.x = pt.y = -1;

   303

	}

   304

   305

	return pt;

   306

}

   307

   308

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

   309

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

   310

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

   311

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

   312

{

   313

	Window *w;

   314

	ViewPort *vp;

   315

	Point pt;

   316

   317

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

   318

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

   319

				return TranslateXYToTileCoord(vp, zoom_x, zoom_y);

   320

   321

	pt.y = pt.x = -1;

   322

	return pt;

   323

}

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   325

Point GetTileBelowCursor(void)

   326

{

   327

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

   328

}

   329

   330

   331

Point GetTileZoomCenterWindow(bool in, Window * w)

   332

{

   333

	int x, y;

   334

	ViewPort * vp;

   335

   336

	vp = w->viewport;

   337

   338

	if (in)	{

   339

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

   340

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

   341

	}

   342

	else {

   343

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

   344

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

   345

	}

   346

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

   347

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

   348

}

   349

   350

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

   351

{

   352

	ViewportDrawer *vd = _cur_vd;

   353

	TileSpriteToDraw *ts;

   354

   355

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

   356

   357

	ts = (TileSpriteToDraw*)vd->spritelist_mem;

   358

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

   359

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

   360

		return;

   361

	}

   362

   363

	vd->spritelist_mem += sizeof(TileSpriteToDraw);

   364

   365

	ts->image = image;

   366

	ts->next = NULL;

   367

	ts->x = x;

   368

	ts->y = y;

   369

	ts->z = z;

   370

	*vd->last_tile = ts;

   371

	vd->last_tile = &ts->next;

   372

}

   373

   374

void DrawGroundSprite(uint32 image)

   375

{

   376

	if (_offset_ground_sprites) {

   377

		// offset ground sprite because of foundation?

   378

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

   379

	} else {

   380

		_added_tile_sprite = true;

   381

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

   382

	}

   383

}

   384

   385

   386

void OffsetGroundSprite(int x, int y)

   387

{

   388

	_cur_vd->offs_x = x;

   389

	_cur_vd->offs_y = y;

   390

	_offset_ground_sprites = true;

   391

}

   392

   393

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

   394

{

   395

	ViewportDrawer *vd = _cur_vd;

   396

	int t;

   397

	uint32 image_org = image;

   398

	const SpriteDimension *sd;

   399

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

   400

   401

	sd = GetSpriteDimension(image & 0x3FFF);

   402

   403

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

   404

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

   405

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

   406

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

   407

		return;

   408

   409

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

   410

}

   411

   412

   413

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

   414

{

   415

	ViewportDrawer *vd = _cur_vd;

   416

	ParentSpriteToDraw *ps;

   417

	const SpriteDimension *sd;

   418

	Point pt;

   419

   420

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

   421

   422

	if (vd->combine_sprites == 2) {

   423

		AddCombinedSprite(image, x, y, z);

   424

		return;

   425

	}

   426

   427

	vd->last_child = NULL;

   428

   429

	ps = (ParentSpriteToDraw*)vd->spritelist_mem;

   430

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

   431

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

   432

		return;

   433

	}

   434

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

   435

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

   436

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

   437

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

   438

		//  parent_list somewhere below to a higher number.

   439

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

   440

		//  spots on the screen ;)

   441

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

   442

		return;

   443

	}

   444

   445

	vd->spritelist_mem += sizeof(ParentSpriteToDraw);

   446

   447

	ps->image = image;

   448

	ps->tile_x = x;

   449

	ps->tile_right = x + w - 1;

   450

   451

	ps->tile_y = y;

   452

	ps->tile_bottom = y + h - 1;

   453

   454

	ps->tile_z = z;

   455

	ps->tile_z_bottom = z + dz - 1;

   456

   457

	pt = RemapCoords(x, y, z);

   458

   459

	sd = GetSpriteDimension(image & 0x3FFF);

   460

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

   461

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

   462

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

   463

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

   464

		return;

   465

	}

   466

   467

	ps->unk16 = 0;

   468

	ps->child = NULL;

   469

	vd->last_child = &ps->child;

   470

   471

	*vd->parent_list++ = ps;

   472

   473

	if (vd->combine_sprites == 1) {

   474

		vd->combine_sprites = 2;

   475

	}

   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

	cs = (ChildScreenSpriteToDraw*) vd->spritelist_mem;

   496

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

   497

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

   498

		return;

   499

	}

   500

   501

	if (vd->last_child == NULL)

   502

		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;

   511

	cs->y = y;

   512

	cs->next = NULL;

   513

}

   514

   515

/* Returns a StringSpriteToDraw */

   516

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

   517

{

   518

	ViewportDrawer *vd = _cur_vd;