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#include "stdafx.h"

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#include "ttd.h"

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#include "debug.h"

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#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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    15

#define VIEWPORT_DRAW_MEM (65536 * 2)

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    17

static bool _added_tile_sprite;

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static bool _offset_ground_sprites;

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    20

typedef struct StringSpriteToDraw {

    21

	uint16 string;

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	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;

    29

    30

typedef struct TileSpriteToDraw {

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	uint32 image;

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	struct TileSpriteToDraw *next;

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	int32 x;

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	int32 y;

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	byte z;

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} TileSpriteToDraw;

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    38

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;

    43

} ChildScreenSpriteToDraw;

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    45

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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    61

typedef struct ViewportDrawer {

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	DrawPixelInfo dpi;

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    64

	byte *spritelist_mem, *eof_spritelist_mem;

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    66

	StringSpriteToDraw **last_string, *first_string;

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	TileSpriteToDraw **last_tile, *first_tile;

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    69

	ChildScreenSpriteToDraw **last_child;

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    71

	ParentSpriteToDraw **parent_list;

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	ParentSpriteToDraw **eof_parent_list;

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    74

	byte combine_sprites;

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    76

	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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    80

static ViewportDrawer *_cur_vd;

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    82

TileHighlightData * const _thd_ptr = &_thd;

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static TileInfo *_cur_ti;

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    85

    86

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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    94

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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{

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	ViewPort *vp;

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	Point pt;

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	byte z;

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	uint32 bit;

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   102

	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;

   106

	}

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	_active_viewports |= bit;

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   109

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

   110

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

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	vp->width = width;

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	vp->height = height;

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   114

	vp->zoom = zoom;

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   116

	vp->virtual_width = width << zoom;

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	vp->virtual_height = height << zoom;

   118

   119

	if (follow_flags & 0x80000000) {

   120

		Vehicle *veh;

   121

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

   122

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

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

   124

	} else {

   125

		int x = TileX(follow_flags) * 16;

   126

		int y = TileY(follow_flags) * 16;

   127

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

   128

		z = GetSlopeZ(x,y);

   129

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

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	}

   131

   132

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

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

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	w->viewport = vp;

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

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

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}

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   139

static Point _vp_move_offs;

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   141

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

   142

{

   143

	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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   149

			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;

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			}

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   155

			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;

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			}

   160

   161

			if (top < w->top) {

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				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;

   165

			}

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   167

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

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

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

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				return;

   171

			}

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   173

			return;

   174

		}

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	}

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   177

	{

   178

		int xo = _vp_move_offs.x;

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		int yo = _vp_move_offs.y;

   180

   181

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

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			/* fully_outside */

   183

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

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			return;

   185

		}

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   187

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

   188

   189

		if (xo > 0) {

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

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			left += xo;

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			width -= xo;

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		} else if (xo < 0) {

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

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			width += xo;

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		}

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   198

		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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   206

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;

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	int left, top, width, height;

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   214

	vp->virtual_left = x;

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	vp->virtual_top = y;

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   217

	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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   222

	old_left -= x;

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	old_top -= y;

   224

   225

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

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		return;

   227

   228

	_vp_move_offs.x = old_left;

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	_vp_move_offs.y = old_top;

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   231

	left = vp->left;

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	top = vp->top;

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	width = vp->width;

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	height = vp->height;

   235

   236

	if (left < 0) {

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		width += left;

   238

		left = 0;

   239

	}

   240

   241

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

   242

		width -= i;

   243

   244

	if (width > 0) {

   245

		if (top < 0) {

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			height += top;

   247

			top = 0;

   248

		}

   249

   250

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

   251

			height -= i;

   252

		}

   253

   254

		if (height > 0)

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

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	}

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}

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   259

   260

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

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{

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	ViewPort *vp = w->viewport;

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	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;

   267

   268

	return NULL;

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}

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   271

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

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{

   273

	int z;

   274

	Point pt;

   275

	int a,b;

   276

   277

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

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

   279

				Point pt = {-1, -1};

   280

				return pt;

   281

	}

   282

   283

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

   284

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

   285

   286

#if !defined(NEW_ROTATION)

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	a = y-x;

   288

	b = y+x;

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#else

   290

	a = x+y;

   291

	b = x-y;

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#endif

   293

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

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

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

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

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

   298

   299

	pt.x = a+z;

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	pt.y = b+z;

   301

   302

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

   303

		pt.x = pt.y = -1;

   304

	}

   305

   306

	return pt;

   307

}

   308

   309

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

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

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

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

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{

   314

	Window *w;

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	ViewPort *vp;

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	Point pt;

   317

   318

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

   319

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

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				return TranslateXYToTileCoord(vp, zoom_x, zoom_y);

   321

   322

	pt.y = pt.x = -1;

   323

	return pt;

   324

}

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   326

Point GetTileBelowCursor(void)

   327

{

   328

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

   329

}

   330

   331

   332

Point GetTileZoomCenterWindow(bool in, Window * w)

   333

{

   334

	int x, y;

   335

	ViewPort * vp;

   336

   337

	vp = w->viewport;

   338

   339

	if (in)	{

   340

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

   341

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

   342

	}

   343

	else {

   344

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

   345

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

   346

	}

   347

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

   348

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

   349

}

   350

   351

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

   352

{

   353

	ViewportDrawer *vd = _cur_vd;

   354

	TileSpriteToDraw *ts;

   355

   356

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

   357

   358

	ts = (TileSpriteToDraw*)vd->spritelist_mem;

   359

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

   360

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

   361

		return;

   362

	}

   363

   364

	vd->spritelist_mem += sizeof(TileSpriteToDraw);

   365

   366

	ts->image = image;

   367

	ts->next = NULL;

   368

	ts->x = x;

   369

	ts->y = y;

   370

	ts->z = z;

   371

	*vd->last_tile = ts;

   372

	vd->last_tile = &ts->next;

   373

}

   374

   375

void DrawGroundSprite(uint32 image)

   376

{

   377

	if (_offset_ground_sprites) {

   378

		// offset ground sprite because of foundation?

   379

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

   380

	} else {

   381

		_added_tile_sprite = true;

   382

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

   383

	}

   384

}

   385

   386

   387

void OffsetGroundSprite(int x, int y)

   388

{

   389

	_cur_vd->offs_x = x;

   390

	_cur_vd->offs_y = y;

   391

	_offset_ground_sprites = true;

   392

}

   393

   394

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

   395

{

   396

	ViewportDrawer *vd = _cur_vd;

   397

	int t;

   398

	uint32 image_org = image;

   399

	const SpriteDimension *sd;

   400

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

   401

   402

	sd = GetSpriteDimension(image & 0x3FFF);

   403

   404

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

   405

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

   406

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

   407

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

   408

		return;

   409

   410

	AddChildSpriteScreen(image_org, 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

	ps = (ParentSpriteToDraw*)vd->spritelist_mem;

   431

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

   432

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

   433

		return;

   434

	}

   435

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

   436

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

   437

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

   438

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

   439

		//  parent_list somewhere below to a higher number.

   440

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

   441

		//  spots on the screen ;)

   442

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

   443

		return;

   444

	}

   445

   446

	vd->spritelist_mem += sizeof(ParentSpriteToDraw);

   447

   448

	ps->image = image;

   449

	ps->tile_x = x;

   450

	ps->tile_right = x + w - 1;

   451

   452

	ps->tile_y = y;

   453

	ps->tile_bottom = y + h - 1;

   454

   455

	ps->tile_z = z;

   456

	ps->tile_z_bottom = z + dz - 1;

   457

   458

	pt = RemapCoords(x, y, z);

   459

   460

	sd = GetSpriteDimension(image & 0x3FFF);

   461

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

   462

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

   463

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

   464

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

   465

		return;

   466

	}

   467

   468

	ps->unk16 = 0;

   469

	ps->child = NULL;

   470

	vd->last_child = &ps->child;

   471

   472

	*vd->parent_list++ = ps;

   473

   474

	if (vd->combine_sprites == 1) {

   475

		vd->combine_sprites = 2;

   476

	}

   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

	cs = (ChildScreenSpriteToDraw*) vd->spritelist_mem;

   497

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

   498

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

   499

		return;

   500

	}

   501

   502

	if (vd->last_child == NULL)

   503

		return;

   504

   505

	vd->spritelist_mem += sizeof(ChildScreenSpriteToDraw);

   506

   507

	*vd->last_child = cs;

   508

	vd->last_child = &cs->next;

   509

   510

	cs->image = image;

   511

	cs->x = x;

   512

	cs->y = y;

   513

	cs->next = NULL;

   514

}

   515

   516

/* Returns a StringSpriteToDraw */

   517

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

   518

{