# viewport.cpp

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    00001 /* $Id: viewport.cpp 19856 2010-05-18 21:38:09Z rubidium $ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
    00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
    00008  */
    00009
    00028 #include "stdafx.h"
    00029 #include "landscape.h"
    00030 #include "viewport_func.h"
    00031 #include "station_base.h"
    00032 #include "waypoint_base.h"
    00033 #include "town.h"
    00034 #include "signs_base.h"
    00035 #include "signs_func.h"
    00036 #include "variables.h"
    00037 #include "vehicle_base.h"
    00038 #include "vehicle_gui.h"
    00039 #include "blitter/factory.hpp"
    00040 #include "strings_func.h"
    00041 #include "zoom_func.h"
    00042 #include "vehicle_func.h"
    00043 #include "company_func.h"
    00044 #include "waypoint_func.h"
    00045 #include "window_func.h"
    00046 #include "tilehighlight_func.h"
    00047 #include "window_gui.h"
    00048
    00049 #include "table/sprites.h"
    00050 #include "table/strings.h"
    00051
    00052 PlaceProc *_place_proc;
    00053 Point _tile_fract_coords;
    00054
    00055 struct StringSpriteToDraw {
    00056   StringID string;
    00057   Colours colour;
    00058   int32 x;
    00059   int32 y;
    00060   uint64 params[2];
    00061   uint16 width;
    00062 };
    00063
    00064 struct TileSpriteToDraw {
    00065   SpriteID image;
    00066   PaletteID pal;
    00067   const SubSprite *sub;
    00068   int32 x;
    00069   int32 y;
    00070 };
    00071
    00072 struct ChildScreenSpriteToDraw {
    00073   SpriteID image;
    00074   PaletteID pal;
    00075   const SubSprite *sub;
    00076   int32 x;
    00077   int32 y;
    00078   int next;
    00079 };
    00080
    00082 struct ParentSpriteToDraw {
    00083   SpriteID image;
    00084   PaletteID pal;
    00085   const SubSprite *sub;
    00086
    00087   int32 x;
    00088   int32 y;
    00089
    00090   int32 left;
    00091   int32 top;
    00092
    00093   int32 xmin;
    00094   int32 xmax;
    00095   int32 ymin;
    00096   int32 ymax;
    00097   int zmin;
    00098   int zmax;
    00099
    00100   int first_child;
    00101   bool comparison_done;
    00102 };
    00103
    00105 enum FoundationPart {
    00106   FOUNDATION_PART_NONE     = 0xFF,
    00107   FOUNDATION_PART_NORMAL   = 0,
    00108   FOUNDATION_PART_HALFTILE = 1,
    00109   FOUNDATION_PART_END
    00110 };
    00111
    00115 enum SpriteCombineMode {
    00116   SPRITE_COMBINE_NONE,
    00117   SPRITE_COMBINE_PENDING,
    00118   SPRITE_COMBINE_ACTIVE,
    00119 };
    00120
    00121 typedef SmallVector<TileSpriteToDraw, 64> TileSpriteToDrawVector;
    00122 typedef SmallVector<StringSpriteToDraw, 4> StringSpriteToDrawVector;
    00123 typedef SmallVector<ParentSpriteToDraw, 64> ParentSpriteToDrawVector;
    00124 typedef SmallVector<ParentSpriteToDraw*, 64> ParentSpriteToSortVector;
    00125 typedef SmallVector<ChildScreenSpriteToDraw, 16> ChildScreenSpriteToDrawVector;
    00126
    00128 struct ViewportDrawer {
    00129   DrawPixelInfo dpi;
    00130
    00131   StringSpriteToDrawVector string_sprites_to_draw;
    00132   TileSpriteToDrawVector tile_sprites_to_draw;
    00133   ParentSpriteToDrawVector parent_sprites_to_draw;
    00134   ParentSpriteToSortVector parent_sprites_to_sort;
    00135   ChildScreenSpriteToDrawVector child_screen_sprites_to_draw;
    00136
    00137   int *last_child;
    00138
    00139   SpriteCombineMode combine_sprites;
    00140
    00141   int foundation[FOUNDATION_PART_END];
    00142   FoundationPart foundation_part;
    00143   int *last_foundation_child[FOUNDATION_PART_END];
    00144   Point foundation_offset[FOUNDATION_PART_END];
    00145 };
    00146
    00147 static ViewportDrawer _vd;
    00148
    00149 TileHighlightData _thd;
    00150 static TileInfo *_cur_ti;
    00151 bool _draw_bounding_boxes = false;
    00152
    00153 static Point MapXYZToViewport(const ViewPort *vp, int x, int y, int z)
    00154 {
    00155   Point p = RemapCoords(x, y, z);
    00156   p.x -= vp->virtual_width / 2;
    00157   p.y -= vp->virtual_height / 2;
    00158   return p;
    00159 }
    00160
    00161 void DeleteWindowViewport(Window *w)
    00162 {
    00163   free(w->viewport);
    00164   w->viewport = NULL;
    00165 }
    00166
    00179 void InitializeWindowViewport(Window *w, int x, int y,
    00180   int width, int height, uint32 follow_flags, ZoomLevel zoom)
    00181 {
    00182   assert(w->viewport == NULL);
    00183
    00184   ViewportData *vp = CallocT<ViewportData>(1);
    00185
    00186   vp->left = x + w->left;
    00187   vp->top = y + w->top;
    00188   vp->width = width;
    00189   vp->height = height;
    00190
    00191   vp->zoom = zoom;
    00192
    00193   vp->virtual_width = ScaleByZoom(width, zoom);
    00194   vp->virtual_height = ScaleByZoom(height, zoom);
    00195
    00196   Point pt;
    00197
    00198   if (follow_flags & 0x80000000) {
    00199     const Vehicle *veh;
    00200
    00201     vp->follow_vehicle = (VehicleID)(follow_flags & 0xFFFF);
    00202     veh = Vehicle::Get(vp->follow_vehicle);
    00203     pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
    00204   } else {
    00205     uint x = TileX(follow_flags) * TILE_SIZE;
    00206     uint y = TileY(follow_flags) * TILE_SIZE;
    00207
    00208     vp->follow_vehicle = INVALID_VEHICLE;
    00209     pt = MapXYZToViewport(vp, x, y, GetSlopeZ(x, y));
    00210   }
    00211
    00212   vp->scrollpos_x = pt.x;
    00213   vp->scrollpos_y = pt.y;
    00214   vp->dest_scrollpos_x = pt.x;
    00215   vp->dest_scrollpos_y = pt.y;
    00216
    00217   w->viewport = vp;
    00218   vp->virtual_left = 0;//pt.x;
    00219   vp->virtual_top = 0;//pt.y;
    00220 }
    00221
    00222 static Point _vp_move_offs;
    00223
    00224 static void DoSetViewportPosition(const Window *w, int left, int top, int width, int height)
    00225 {
    00226   FOR_ALL_WINDOWS_FROM_BACK_FROM(w, w) {
    00227     if (left + width > w->left &&
    00228         w->left + w->width > left &&
    00229         top + height > w->top &&
    00230         w->top + w->height > top) {
    00231
    00232       if (left < w->left) {
    00233         DoSetViewportPosition(w, left, top, w->left - left, height);
    00234         DoSetViewportPosition(w, left + (w->left - left), top, width - (w->left - left), height);
    00235         return;
    00236       }
    00237
    00238       if (left + width > w->left + w->width) {
    00239         DoSetViewportPosition(w, left, top, (w->left + w->width - left), height);
    00240         DoSetViewportPosition(w, left + (w->left + w->width - left), top, width - (w->left + w->width - left), height);
    00241         return;
    00242       }
    00243
    00244       if (top < w->top) {
    00245         DoSetViewportPosition(w, left, top, width, (w->top - top));
    00246         DoSetViewportPosition(w, left, top + (w->top - top), width, height - (w->top - top));
    00247         return;
    00248       }
    00249
    00250       if (top + height > w->top + w->height) {
    00251         DoSetViewportPosition(w, left, top, width, (w->top + w->height - top));
    00252         DoSetViewportPosition(w, left, top + (w->top + w->height - top), width, height - (w->top + w->height - top));
    00253         return;
    00254       }
    00255
    00256       return;
    00257     }
    00258   }
    00259
    00260   {
    00261     int xo = _vp_move_offs.x;
    00262     int yo = _vp_move_offs.y;
    00263
    00264     if (abs(xo) >= width || abs(yo) >= height) {
    00265       /* fully_outside */
    00266       RedrawScreenRect(left, top, left + width, top + height);
    00267       return;
    00268     }
    00269
    00270     GfxScroll(left, top, width, height, xo, yo);
    00271
    00272     if (xo > 0) {
    00273       RedrawScreenRect(left, top, xo + left, top + height);
    00274       left += xo;
    00275       width -= xo;
    00276     } else if (xo < 0) {
    00277       RedrawScreenRect(left + width + xo, top, left + width, top + height);
    00278       width += xo;
    00279     }
    00280
    00281     if (yo > 0) {
    00282       RedrawScreenRect(left, top, width + left, top + yo);
    00283     } else if (yo < 0) {
    00284       RedrawScreenRect(left, top + height + yo, width + left, top + height);
    00285     }
    00286   }
    00287 }
    00288
    00289 static void SetViewportPosition(Window *w, int x, int y)
    00290 {
    00291   ViewPort *vp = w->viewport;
    00292   int old_left = vp->virtual_left;
    00293   int old_top = vp->virtual_top;
    00294   int i;
    00295   int left, top, width, height;
    00296
    00297   vp->virtual_left = x;
    00298   vp->virtual_top = y;
    00299
    00300   /* viewport is bound to its left top corner, so it must be rounded down (UnScaleByZoomLower)
    00301    * else glitch described in FS#1412 will happen (offset by 1 pixel with zoom level > NORMAL)
    00302    */
    00303   old_left = UnScaleByZoomLower(old_left, vp->zoom);
    00304   old_top = UnScaleByZoomLower(old_top, vp->zoom);
    00305   x = UnScaleByZoomLower(x, vp->zoom);
    00306   y = UnScaleByZoomLower(y, vp->zoom);
    00307
    00308   old_left -= x;
    00309   old_top -= y;
    00310
    00311   if (old_top == 0 && old_left == 0) return;
    00312
    00313   _vp_move_offs.x = old_left;
    00314   _vp_move_offs.y = old_top;
    00315
    00316   left = vp->left;
    00317   top = vp->top;
    00318   width = vp->width;
    00319   height = vp->height;
    00320
    00321   if (left < 0) {
    00322     width += left;
    00323     left = 0;
    00324   }
    00325
    00326   i = left + width - _screen.width;
    00327   if (i >= 0) width -= i;
    00328
    00329   if (width > 0) {
    00330     if (top < 0) {
    00331       height += top;
    00332       top = 0;
    00333     }
    00334
    00335     i = top + height - _screen.height;
    00336     if (i >= 0) height -= i;
    00337
    00338     if (height > 0) DoSetViewportPosition(w->z_front, left, top, width, height);
    00339   }
    00340 }
    00341
    00350 ViewPort *IsPtInWindowViewport(const Window *w, int x, int y)
    00351 {
    00352   ViewPort *vp = w->viewport;
    00353
    00354   if (vp != NULL &&
    00355       IsInsideMM(x, vp->left, vp->left + vp->width) &&
    00356       IsInsideMM(y, vp->top, vp->top + vp->height))
    00357     return vp;
    00358
    00359   return NULL;
    00360 }
    00361
    00368 static Point TranslateXYToTileCoord(const ViewPort *vp, int x, int y)
    00369 {
    00370   Point pt;
    00371   int a, b;
    00372   uint z;
    00373
    00374   if ( (uint)(x -= vp->left) >= (uint)vp->width ||
    00375         (uint)(y -= vp->top) >= (uint)vp->height) {
    00376         Point pt = {-1, -1};
    00377         return pt;
    00378   }
    00379
    00380   x = (ScaleByZoom(x, vp->zoom) + vp->virtual_left) >> 2;
    00381   y = (ScaleByZoom(y, vp->zoom) + vp->virtual_top) >> 1;
    00382
    00383   a = y - x;
    00384   b = y + x;
    00385
    00386   /* we need to move variables in to the valid range, as the
    00387    * GetTileZoomCenterWindow() function can call here with invalid x and/or y,
    00388    * when the user tries to zoom out along the sides of the map */
    00389   a = Clamp(a, -4 * TILE_SIZE, (int)(MapMaxX() * TILE_SIZE) - 1);
    00390   b = Clamp(b, -4 * TILE_SIZE, (int)(MapMaxY() * TILE_SIZE) - 1);
    00391
    00392   /* (a, b) is the X/Y-world coordinate that belongs to (x,y) if the landscape would be completely flat on height 0.
    00393    * Now find the Z-world coordinate by fix point iteration.
    00394    * This is a bit tricky because the tile height is non-continuous at foundations.
    00395    * The clicked point should be approached from the back, otherwise there are regions that are not clickable.
    00396    * (FOUNDATION_HALFTILE_LOWER on SLOPE_STEEP_S hides north halftile completely)
    00397    * So give it a z-malus of 4 in the first iterations.
    00398    */
    00399   z = 0;
    00400
    00401   int min_coord = _settings_game.construction.freeform_edges ? TILE_SIZE : 0;
    00402
    00403   for (int i = 0; i < 5; i++) z = GetSlopeZ(Clamp(a + (int)max(z, 4u) - 4, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + (int)max(z, 4u) - 4, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
    00404   for (uint malus = 3; malus > 0; malus--) z = GetSlopeZ(Clamp(a + (int)max(z, malus) - (int)malus, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + (int)max(z, malus) - (int)malus, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
    00405   for (int i = 0; i < 5; i++) z = GetSlopeZ(Clamp(a + (int)z, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + (int)z, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
    00406
    00407   pt.x = Clamp(a + (int)z, min_coord, MapMaxX() * TILE_SIZE - 1);
    00408   pt.y = Clamp(b + (int)z, min_coord, MapMaxY() * TILE_SIZE - 1);
    00409
    00410   return pt;
    00411 }
    00412
    00413 /* When used for zooming, check area below current coordinates (x,y)
    00414  * and return the tile of the zoomed out/in position (zoom_x, zoom_y)
    00415  * when you just want the tile, make x = zoom_x and y = zoom_y */
    00416 static Point GetTileFromScreenXY(int x, int y, int zoom_x, int zoom_y)
    00417 {
    00418   Window *w;
    00419   ViewPort *vp;
    00420   Point pt;
    00421
    00422   if ( (w = FindWindowFromPt(x, y)) != NULL &&
    00423        (vp = IsPtInWindowViewport(w, x, y)) != NULL)
    00424         return TranslateXYToTileCoord(vp, zoom_x, zoom_y);
    00425
    00426   pt.y = pt.x = -1;
    00427   return pt;
    00428 }
    00429
    00430 Point GetTileBelowCursor()
    00431 {
    00432   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, _cursor.pos.x, _cursor.pos.y);
    00433 }
    00434
    00435
    00436 Point GetTileZoomCenterWindow(bool in, Window * w)
    00437 {
    00438   int x, y;
    00439   ViewPort *vp = w->viewport;
    00440
    00441   if (in) {
    00442     x = ((_cursor.pos.x - vp->left) >> 1) + (vp->width >> 2);
    00443     y = ((_cursor.pos.y - vp->top) >> 1) + (vp->height >> 2);
    00444   } else {
    00445     x = vp->width - (_cursor.pos.x - vp->left);
    00446     y = vp->height - (_cursor.pos.y - vp->top);
    00447   }
    00448   /* Get the tile below the cursor and center on the zoomed-out center */
    00449   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, x + vp->left, y + vp->top);
    00450 }
    00451
    00458 void HandleZoomMessage(Window *w, const ViewPort *vp, byte widget_zoom_in, byte widget_zoom_out)
    00459 {
    00460   w->SetWidgetDisabledState(widget_zoom_in, vp->zoom == ZOOM_LVL_MIN);
    00461   w->SetWidgetDirty(widget_zoom_in);
    00462
    00463   w->SetWidgetDisabledState(widget_zoom_out, vp->zoom == ZOOM_LVL_MAX);
    00464   w->SetWidgetDirty(widget_zoom_out);
    00465 }
    00466
    00479 static void AddTileSpriteToDraw(SpriteID image, PaletteID pal, int32 x, int32 y, int z, const SubSprite *sub = NULL, int extra_offs_x = 0, int extra_offs_y = 0)
    00480 {
    00481   assert((image & SPRITE_MASK) < MAX_SPRITES);
    00482
    00483   TileSpriteToDraw *ts = _vd.tile_sprites_to_draw.Append();
    00484   ts->image = image;
    00485   ts->pal = pal;
    00486   ts->sub = sub;
    00487   Point pt = RemapCoords(x, y, z);
    00488   ts->x = pt.x + extra_offs_x;
    00489   ts->y = pt.y + extra_offs_y;
    00490 }
    00491
    00504 static void AddChildSpriteToFoundation(SpriteID image, PaletteID pal, const SubSprite *sub, FoundationPart foundation_part, int extra_offs_x, int extra_offs_y)
    00505 {
    00506   assert(IsInsideMM(foundation_part, 0, FOUNDATION_PART_END));
    00507   assert(_vd.foundation[foundation_part] != -1);
    00508   Point offs = _vd.foundation_offset[foundation_part];
    00509
    00510   /* Change the active ChildSprite list to the one of the foundation */
    00511   int *old_child = _vd.last_child;
    00512   _vd.last_child = _vd.last_foundation_child[foundation_part];
    00513
    00514   AddChildSpriteScreen(image, pal, offs.x + extra_offs_x, offs.y + extra_offs_y, false, sub);
    00515
    00516   /* Switch back to last ChildSprite list */
    00517   _vd.last_child = old_child;
    00518 }
    00519
    00533 void DrawGroundSpriteAt(SpriteID image, PaletteID pal, int32 x, int32 y, int z, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
    00534 {
    00535   /* Switch to first foundation part, if no foundation was drawn */
    00536   if (_vd.foundation_part == FOUNDATION_PART_NONE) _vd.foundation_part = FOUNDATION_PART_NORMAL;
    00537
    00538   if (_vd.foundation[_vd.foundation_part] != -1) {
    00539     Point pt = RemapCoords(x, y, z);
    00540     AddChildSpriteToFoundation(image, pal, sub, _vd.foundation_part, pt.x + extra_offs_x, pt.y + extra_offs_y);
    00541   } else {
    00542     AddTileSpriteToDraw(image, pal, _cur_ti->x + x, _cur_ti->y + y, _cur_ti->z + z, sub, extra_offs_x, extra_offs_y);
    00543   }
    00544 }
    00545
    00556 void DrawGroundSprite(SpriteID image, PaletteID pal, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
    00557 {
    00558   DrawGroundSpriteAt(image, pal, 0, 0, 0, sub, extra_offs_x, extra_offs_y);
    00559 }
    00560
    00568 void OffsetGroundSprite(int x, int y)
    00569 {
    00570   /* Switch to next foundation part */
    00571   switch (_vd.foundation_part) {
    00572     case FOUNDATION_PART_NONE:
    00573       _vd.foundation_part = FOUNDATION_PART_NORMAL;
    00574       break;
    00575     case FOUNDATION_PART_NORMAL:
    00576       _vd.foundation_part = FOUNDATION_PART_HALFTILE;
    00577       break;
    00578     default: NOT_REACHED();
    00579   }
    00580
    00581   /* _vd.last_child == NULL if foundation sprite was clipped by the viewport bounds */
    00582   if (_vd.last_child != NULL) _vd.foundation[_vd.foundation_part] = _vd.parent_sprites_to_draw.Length() - 1;
    00583
    00584   _vd.foundation_offset[_vd.foundation_part].x = x;
    00585   _vd.foundation_offset[_vd.foundation_part].y = y;
    00586   _vd.last_foundation_child[_vd.foundation_part] = _vd.last_child;
    00587 }
    00588
    00600 static void AddCombinedSprite(SpriteID image, PaletteID pal, int x, int y, byte z, const SubSprite *sub)
    00601 {
    00602   Point pt = RemapCoords(x, y, z);
    00603   const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
    00604
    00605   if (pt.x + spr->x_offs >= _vd.dpi.left + _vd.dpi.width ||
    00606       pt.x + spr->x_offs + spr->width <= _vd.dpi.left ||
    00607       pt.y + spr->y_offs >= _vd.dpi.top + _vd.dpi.height ||
    00608       pt.y + spr->y_offs + spr->height <= _vd.dpi.top)
    00609     return;
    00610
    00611   const ParentSpriteToDraw *pstd = _vd.parent_sprites_to_draw.End() - 1;
    00612   AddChildSpriteScreen(image, pal, pt.x - pstd->left, pt.y - pstd->top, false, sub);
    00613 }
    00614
    00639 void AddSortableSpriteToDraw(SpriteID image, PaletteID pal, int x, int y, int w, int h, int dz, int z, bool transparent, int bb_offset_x, int bb_offset_y, int bb_offset_z, const SubSprite *sub)
    00640 {
    00641   int32 left, right, top, bottom;
    00642
    00643   assert((image & SPRITE_MASK) < MAX_SPRITES);
    00644
    00645   /* make the sprites transparent with the right palette */
    00646   if (transparent) {
    00647     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
    00648     pal = PALETTE_TO_TRANSPARENT;
    00649   }
    00650
    00651   if (_vd.combine_sprites == SPRITE_COMBINE_ACTIVE) {
    00652     AddCombinedSprite(image, pal, x, y, z, sub);
    00653     return;
    00654   }
    00655
    00656   _vd.last_child = NULL;
    00657
    00658   Point pt = RemapCoords(x, y, z);
    00659   int tmp_left, tmp_top, tmp_x = pt.x, tmp_y = pt.y;
    00660
    00661   /* Compute screen extents of sprite */
    00662   if (image == SPR_EMPTY_BOUNDING_BOX) {
    00663     left = tmp_left = RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x;
    00664     right           = RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1;
    00665     top  = tmp_top  = RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y;
    00666     bottom          = RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1;
    00667   } else {
    00668     const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
    00669     left = tmp_left = (pt.x += spr->x_offs);
    00670     right           = (pt.x +  spr->width );
    00671     top  = tmp_top  = (pt.y += spr->y_offs);
    00672     bottom          = (pt.y +  spr->height);
    00673   }
    00674
    00675   if (_draw_bounding_boxes && (image != SPR_EMPTY_BOUNDING_BOX)) {
    00676     /* Compute maximal extents of sprite and it's bounding box */
    00677     left   = min(left  , RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x);
    00678     right  = max(right , RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1);
    00679     top    = min(top   , RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y);
    00680     bottom = max(bottom, RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1);
    00681   }
    00682
    00683   /* Do not add the sprite to the viewport, if it is outside */
    00684   if (left   >= _vd.dpi.left + _vd.dpi.width ||
    00685       right  <= _vd.dpi.left                 ||
    00686       top    >= _vd.dpi.top + _vd.dpi.height ||
    00687       bottom <= _vd.dpi.top) {
    00688     return;
    00689   }
    00690
    00691   ParentSpriteToDraw *ps = _vd.parent_sprites_to_draw.Append();
    00692   ps->x = tmp_x;
    00693   ps->y = tmp_y;
    00694
    00695   ps->left = tmp_left;
    00696   ps->top  = tmp_top;
    00697
    00698   ps->image = image;
    00699   ps->pal = pal;
    00700   ps->sub = sub;
    00701   ps->xmin = x + bb_offset_x;
    00702   ps->xmax = x + max(bb_offset_x, w) - 1;
    00703
    00704   ps->ymin = y + bb_offset_y;
    00705   ps->ymax = y + max(bb_offset_y, h) - 1;
    00706
    00707   ps->zmin = z + bb_offset_z;
    00708   ps->zmax = z + max(bb_offset_z, dz) - 1;
    00709
    00710   ps->comparison_done = false;
    00711   ps->first_child = -1;
    00712
    00713   _vd.last_child = &ps->first_child;
    00714
    00715   if (_vd.combine_sprites == SPRITE_COMBINE_PENDING) _vd.combine_sprites = SPRITE_COMBINE_ACTIVE;
    00716 }
    00717
    00736 void StartSpriteCombine()
    00737 {
    00738   assert(_vd.combine_sprites == SPRITE_COMBINE_NONE);
    00739   _vd.combine_sprites = SPRITE_COMBINE_PENDING;
    00740 }
    00741
    00746 void EndSpriteCombine()
    00747 {
    00748   assert(_vd.combine_sprites != SPRITE_COMBINE_NONE);
    00749   _vd.combine_sprites = SPRITE_COMBINE_NONE;
    00750 }
    00751
    00762 void AddChildSpriteScreen(SpriteID image, PaletteID pal, int x, int y, bool transparent, const SubSprite *sub)
    00763 {
    00764   assert((image & SPRITE_MASK) < MAX_SPRITES);
    00765
    00766   /* If the ParentSprite was clipped by the viewport bounds, do not draw the ChildSprites either */
    00767   if (_vd.last_child == NULL) return;
    00768
    00769   /* make the sprites transparent with the right palette */
    00770   if (transparent) {
    00771     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
    00772     pal = PALETTE_TO_TRANSPARENT;
    00773   }
    00774
    00775   *_vd.last_child = _vd.child_screen_sprites_to_draw.Length();
    00776
    00777   ChildScreenSpriteToDraw *cs = _vd.child_screen_sprites_to_draw.Append();
    00778   cs->image = image;
    00779   cs->pal = pal;
    00780   cs->sub = sub;
    00781   cs->x = x;
    00782   cs->y = y;
    00783   cs->next = -1;
    00784
    00785   /* Append the sprite to the active ChildSprite list.
    00786    * If the active ParentSprite is a foundation, update last_foundation_child as well.
    00787    * Note: ChildSprites of foundations are NOT sequential in the vector, as selection sprites are added at last. */
    00788   if (_vd.last_foundation_child[0] == _vd.last_child) _vd.last_foundation_child[0] = &cs->next;
    00789   if (_vd.last_foundation_child[1] == _vd.last_child) _vd.last_foundation_child[1] = &cs->next;
    00790   _vd.last_child = &cs->next;
    00791 }
    00792
    00793 static void AddStringToDraw(int x, int y, StringID string, uint64 params_1, uint64 params_2, Colours colour, uint16 width)
    00794 {
    00795   assert(width != 0);
    00796   StringSpriteToDraw *ss = _vd.string_sprites_to_draw.Append();
    00797   ss->string = string;
    00798   ss->x = x;
    00799   ss->y = y;
    00800   ss->params[0] = params_1;
    00801   ss->params[1] = params_2;
    00802   ss->width = width;
    00803   ss->colour = colour;
    00804 }
    00805
    00806
    00818 static void DrawSelectionSprite(SpriteID image, PaletteID pal, const TileInfo *ti, int z_offset, FoundationPart foundation_part)
    00819 {
    00820   /* FIXME: This is not totally valid for some autorail highlights, that extent over the edges of the tile. */
    00821   if (_vd.foundation[foundation_part] == -1) {
    00822     /* draw on real ground */
    00823     AddTileSpriteToDraw(image, pal, ti->x, ti->y, ti->z + z_offset);
    00824   } else {
    00825     /* draw on top of foundation */
    00826     AddChildSpriteToFoundation(image, pal, NULL, foundation_part, 0, -z_offset);
    00827   }
    00828 }
    00829
    00836 static void DrawTileSelectionRect(const TileInfo *ti, PaletteID pal)
    00837 {
    00838   if (!IsValidTile(ti->tile)) return;
    00839
    00840   SpriteID sel;
    00841   if (IsHalftileSlope(ti->tileh)) {
    00842     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
    00843     SpriteID sel2 = SPR_HALFTILE_SELECTION_FLAT + halftile_corner;
    00844     DrawSelectionSprite(sel2, pal, ti, 7 + TILE_HEIGHT, FOUNDATION_PART_HALFTILE);
    00845
    00846     Corner opposite_corner = OppositeCorner(halftile_corner);
    00847     if (IsSteepSlope(ti->tileh)) {
    00848       sel = SPR_HALFTILE_SELECTION_DOWN;
    00849     } else {
    00850       sel = ((ti->tileh & SlopeWithOneCornerRaised(opposite_corner)) != 0 ? SPR_HALFTILE_SELECTION_UP : SPR_HALFTILE_SELECTION_FLAT);
    00851     }
    00852     sel += opposite_corner;
    00853   } else {
    00854     sel = SPR_SELECT_TILE + _tileh_to_sprite[ti->tileh];
    00855   }
    00856   DrawSelectionSprite(sel, pal, ti, 7, FOUNDATION_PART_NORMAL);
    00857 }
    00858
    00859 static bool IsPartOfAutoLine(int px, int py)
    00860 {
    00861   px -= _thd.selstart.x;
    00862   py -= _thd.selstart.y;
    00863
    00864   if ((_thd.drawstyle & ~HT_DIR_MASK) != HT_LINE) return false;
    00865
    00866   switch (_thd.drawstyle & HT_DIR_MASK) {
    00867     case HT_DIR_X:  return py == 0; // x direction
    00868     case HT_DIR_Y:  return px == 0; // y direction
    00869     case HT_DIR_HU: return px == -py || px == -py - 16; // horizontal upper
    00870     case HT_DIR_HL: return px == -py || px == -py + 16; // horizontal lower
    00871     case HT_DIR_VL: return px == py || px == py + 16; // vertival left
    00872     case HT_DIR_VR: return px == py || px == py - 16; // vertical right
    00873     default:
    00874       NOT_REACHED();
    00875   }
    00876 }
    00877
    00878 /* [direction][side] */
    00879 static const HighLightStyle _autorail_type[6][2] = {
    00880   { HT_DIR_X,  HT_DIR_X },
    00881   { HT_DIR_Y,  HT_DIR_Y },
    00882   { HT_DIR_HU, HT_DIR_HL },
    00883   { HT_DIR_HL, HT_DIR_HU },
    00884   { HT_DIR_VL, HT_DIR_VR },
    00885   { HT_DIR_VR, HT_DIR_VL }
    00886 };
    00887
    00888 #include "table/autorail.h"
    00889
    00896 static void DrawAutorailSelection(const TileInfo *ti, uint autorail_type)
    00897 {
    00898   SpriteID image;
    00899   PaletteID pal;
    00900   int offset;
    00901
    00902   FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
    00903   Slope autorail_tileh = RemoveHalftileSlope(ti->tileh);
    00904   if (IsHalftileSlope(ti->tileh)) {
    00905     static const uint _lower_rail[4] = { 5U, 2U, 4U, 3U };
    00906     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
    00907     if (autorail_type != _lower_rail[halftile_corner]) {
    00908       foundation_part = FOUNDATION_PART_HALFTILE;
    00909       /* Here we draw the highlights of the "three-corners-raised"-slope. That looks ok to me. */
    00910       autorail_tileh = SlopeWithThreeCornersRaised(OppositeCorner(halftile_corner));
    00911     }
    00912   }
    00913
    00914   offset = _AutorailTilehSprite[autorail_tileh][autorail_type];
    00915   if (offset >= 0) {
    00916     image = SPR_AUTORAIL_BASE + offset;
    00917     pal = PAL_NONE;
    00918   } else {
    00919     image = SPR_AUTORAIL_BASE - offset;
    00920     pal = PALETTE_SEL_TILE_RED;
    00921   }
    00922
    00923   DrawSelectionSprite(image, _thd.make_square_red ? PALETTE_SEL_TILE_RED : pal, ti, 7, foundation_part);
    00924 }
    00925
    00930 static void DrawTileSelection(const TileInfo *ti)
    00931 {
    00932   /* Draw a red error square? */
    00933   bool is_redsq = _thd.redsq == ti->tile;
    00934   if (is_redsq) DrawTileSelectionRect(ti, PALETTE_TILE_RED_PULSATING);
    00935
    00936   /* no selection active? */
    00937   if (_thd.drawstyle == 0) return;
    00938
    00939   /* Inside the inner area? */
    00940   if (IsInsideBS(ti->x, _thd.pos.x, _thd.size.x) &&
    00941       IsInsideBS(ti->y, _thd.pos.y, _thd.size.y)) {
    00942     if (_thd.drawstyle & HT_RECT) {
    00943       if (!is_redsq) DrawTileSelectionRect(ti, _thd.make_square_red ? PALETTE_SEL_TILE_RED : PAL_NONE);
    00944     } else if (_thd.drawstyle & HT_POINT) {
    00945       /* Figure out the Z coordinate for the single dot. */
    00946       byte z = 0;
    00947       FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
    00948       if (ti->tileh & SLOPE_N) {
    00949         z += TILE_HEIGHT;
    00950         if (RemoveHalftileSlope(ti->tileh) == SLOPE_STEEP_N) z += TILE_HEIGHT;
    00951       }
    00952       if (IsHalftileSlope(ti->tileh)) {
    00953         Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
    00954         if ((halftile_corner == CORNER_W) || (halftile_corner == CORNER_E)) z += TILE_HEIGHT;
    00955         if (halftile_corner != CORNER_S) {
    00956           foundation_part = FOUNDATION_PART_HALFTILE;
    00957           if (IsSteepSlope(ti->tileh)) z -= TILE_HEIGHT;
    00958         }
    00959       }
    00960       DrawSelectionSprite(_cur_dpi->zoom <= ZOOM_LVL_DETAIL ? SPR_DOT : SPR_DOT_SMALL, PAL_NONE, ti, z, foundation_part);
    00961     } else if (_thd.drawstyle & HT_RAIL) {
    00962       /* autorail highlight piece under cursor */
    00963       HighLightStyle type = _thd.drawstyle & HT_DIR_MASK;
    00964       assert(type < HT_DIR_END);
    00965       DrawAutorailSelection(ti, _autorail_type[type][0]);
    00966     } else if (IsPartOfAutoLine(ti->x, ti->y)) {
    00967       /* autorail highlighting long line */
    00968       HighLightStyle dir = _thd.drawstyle & HT_DIR_MASK;
    00969       uint side;
    00970
    00971       if (dir == HT_DIR_X || dir == HT_DIR_Y) {
    00972         side = 0;
    00973       } else {
    00974         TileIndex start = TileVirtXY(_thd.selstart.x, _thd.selstart.y);
    00975         side = Delta(Delta(TileX(start), TileX(ti->tile)), Delta(TileY(start), TileY(ti->tile)));
    00976       }
    00977
    00978       DrawAutorailSelection(ti, _autorail_type[dir][side]);
    00979     }
    00980     return;
    00981   }
    00982
    00983   /* Check if it's inside the outer area? */
    00984   if (!is_redsq && _thd.outersize.x &&
    00985       _thd.size.x < _thd.size.x + _thd.outersize.x &&
    00986       IsInsideBS(ti->x, _thd.pos.x + _thd.offs.x, _thd.size.x + _thd.outersize.x) &&
    00987       IsInsideBS(ti->y, _thd.pos.y + _thd.offs.y, _thd.size.y + _thd.outersize.y)) {
    00988     /* Draw a blue rect. */
    00989     DrawTileSelectionRect(ti, PALETTE_SEL_TILE_BLUE);
    00990     return;
    00991   }
    00992 }
    00993
    00994 static void ViewportAddLandscape()
    00995 {
    00996   int x, y, width, height;
    00997   TileInfo ti;
    00998   bool direction;
    00999
    01000   _cur_ti = &ti;
    01001
    01002   /* Transform into tile coordinates and round to closest full tile */
    01003   x = ((_vd.dpi.top >> 1) - (_vd.dpi.left >> 2)) & ~TILE_UNIT_MASK;
    01004   y = ((_vd.dpi.top >> 1) + (_vd.dpi.left >> 2) - TILE_SIZE) & ~TILE_UNIT_MASK;
    01005
    01006   /* determine size of area */
    01007   {
    01008     Point pt = RemapCoords(x, y, 241);
    01009     width = (_vd.dpi.left + _vd.dpi.width - pt.x + 95) >> 6;
    01010     height = (_vd.dpi.top + _vd.dpi.height - pt.y) >> 5 << 1;
    01011   }
    01012
    01013   assert(width > 0);
    01014   assert(height > 0);
    01015
    01016   direction = false;
    01017
    01018   do {
    01019     int width_cur = width;
    01020     int x_cur = x;
    01021     int y_cur = y;
    01022
    01023     do {
    01024       TileType tt = MP_VOID;
    01025
    01026       ti.x = x_cur;
    01027       ti.y = y_cur;
    01028
    01029       ti.z = 0;
    01030
    01031       ti.tileh = SLOPE_FLAT;
    01032       ti.tile = INVALID_TILE;
    01033
    01034       if (0 <= x_cur && x_cur < (int)MapMaxX() * TILE_SIZE &&
    01035           0 <= y_cur && y_cur < (int)MapMaxY() * TILE_SIZE) {
    01036         TileIndex tile = TileVirtXY(x_cur, y_cur);
    01037
    01038         if (!_settings_game.construction.freeform_edges || (TileX(tile) != 0 && TileY(tile) != 0)) {
    01039           if (x_cur == ((int)MapMaxX() - 1) * TILE_SIZE || y_cur == ((int)MapMaxY() - 1) * TILE_SIZE) {
    01040             uint maxh = max<uint>(TileHeight(tile), 1);
    01041             for (uint h = 0; h < maxh; h++) {
    01042               AddTileSpriteToDraw(SPR_SHADOW_CELL, PAL_NONE, ti.x, ti.y, h * TILE_HEIGHT);
    01043             }
    01044           }
    01045
    01046           ti.tile = tile;
    01047           ti.tileh = GetTileSlope(tile, &ti.z);
    01048           tt = GetTileType(tile);
    01049         }
    01050       }
    01051
    01052       _vd.foundation_part = FOUNDATION_PART_NONE;
    01053       _vd.foundation[0] = -1;
    01054       _vd.foundation[1] = -1;
    01055       _vd.last_foundation_child[0] = NULL;
    01056       _vd.last_foundation_child[1] = NULL;
    01057
    01058       _tile_type_procs[tt]->draw_tile_proc(&ti);
    01059
    01060       if ((x_cur == (int)MapMaxX() * TILE_SIZE && IsInsideMM(y_cur, 0, MapMaxY() * TILE_SIZE + 1)) ||
    01061         (y_cur == (int)MapMaxY() * TILE_SIZE && IsInsideMM(x_cur, 0, MapMaxX() * TILE_SIZE + 1))) {
    01062         TileIndex tile = TileVirtXY(x_cur, y_cur);
    01063         ti.tile = tile;
    01064         ti.tileh = GetTileSlope(tile, &ti.z);
    01065         tt = GetTileType(tile);
    01066       }
    01067       if (ti.tile != INVALID_TILE) DrawTileSelection(&ti);
    01068
    01069       y_cur += 0x10;
    01070       x_cur -= 0x10;
    01071     } while (--width_cur);
    01072
    01073     if ((direction ^= 1) != 0) {
    01074       y += 0x10;
    01075     } else {
    01076       x += 0x10;
    01077     }
    01078   } while (--height);
    01079 }
    01080
    01091 void ViewportAddString(const DrawPixelInfo *dpi, ZoomLevel small_from, const ViewportSign *sign, StringID string_normal, StringID string_small, StringID string_small_shadow, uint64 params_1, uint64 params_2, Colours colour)
    01092 {
    01093   bool small = dpi->zoom >= small_from;
    01094
    01095   int left   = dpi->left;
    01096   int top    = dpi->top;
    01097   int right  = left + dpi->width;
    01098   int bottom = top + dpi->height;
    01099
    01100   int sign_height     = ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM, dpi->zoom);
    01101   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, dpi->zoom);
    01102
    01103   if (bottom < sign->top ||
    01104       top   > sign->top + sign_height ||
    01105       right < sign->center - sign_half_width ||
    01106       left  > sign->center + sign_half_width) {
    01107     return;
    01108   }
    01109
    01110   if (!small) {
    01111     AddStringToDraw(sign->center - sign_half_width, sign->top, string_normal, params_1, params_2, colour, sign->width_normal);
    01112   } else {
    01113     int shadow_offset = 0;
    01114     if (string_small_shadow != STR_NULL) {
    01115       shadow_offset = 4;
    01116       AddStringToDraw(sign->center - sign_half_width + shadow_offset, sign->top, string_small_shadow, params_1, params_2, INVALID_COLOUR, sign->width_small);
    01117     }
    01118     AddStringToDraw(sign->center - sign_half_width, sign->top - shadow_offset, string_small, params_1, params_2,
    01119         colour, sign->width_small | 0x8000);
    01120   }
    01121 }
    01122
    01123 static void ViewportAddTownNames(DrawPixelInfo *dpi)
    01124 {
    01125   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES) || _game_mode == GM_MENU) return;
    01126
    01127   const Town *t;
    01128   FOR_ALL_TOWNS(t) {
    01129     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &t->sign,
    01130         _settings_client.gui.population_in_label ? STR_VIEWPORT_TOWN_POP : STR_VIEWPORT_TOWN,
    01131         STR_VIEWPORT_TOWN_TINY_WHITE, STR_VIEWPORT_TOWN_TINY_BLACK,
    01132         t->index, t->population);
    01133   }
    01134 }
    01135
    01136
    01137 static void ViewportAddStationNames(DrawPixelInfo *dpi)
    01138 {
    01139   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || _game_mode == GM_MENU) return;
    01140
    01141   const BaseStation *st;
    01142   FOR_ALL_BASE_STATIONS(st) {
    01143     /* Check whether the base station is a station or a waypoint */
    01144     bool is_station = Station::IsExpected(st);
    01145
    01146     /* Don't draw if the display options are disabled */
    01147     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
    01148
    01149     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &st->sign,
    01150         is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT,
    01151         (is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT) + 1, STR_NULL,
    01152         st->index, st->facilities, (st->owner == OWNER_NONE || !st->IsInUse()) ? COLOUR_GREY : _company_colours[st->owner]);
    01153   }
    01154 }
    01155
    01156
    01157 static void ViewportAddSigns(DrawPixelInfo *dpi)
    01158 {
    01159   /* Signs are turned off or are invisible */
    01160   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS)) return;
    01161
    01162   const Sign *si;
    01163   FOR_ALL_SIGNS(si) {
    01164     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &si->sign,
    01165         STR_WHITE_SIGN,
    01166         IsTransparencySet(TO_SIGNS) ? STR_VIEWPORT_SIGN_SMALL_WHITE : STR_VIEWPORT_SIGN_SMALL_BLACK, STR_NULL,
    01167         si->index, 0, (si->owner == OWNER_NONE) ? COLOUR_GREY : _company_colours[si->owner]);
    01168   }
    01169 }
    01170
    01177 void ViewportSign::UpdatePosition(int center, int top, StringID str)
    01178 {
    01179   if (this->width_normal != 0) this->MarkDirty();
    01180
    01181   this->top = top;
    01182
    01183   char buffer[DRAW_STRING_BUFFER];
    01184
    01185   GetString(buffer, str, lastof(buffer));
    01186   this->width_normal = VPSM_LEFT + Align(GetStringBoundingBox(buffer).width, 2) + VPSM_RIGHT;
    01187   this->center = center;
    01188
    01189   /* zoomed out version */
    01190   _cur_fontsize = FS_SMALL;
    01191   this->width_small = VPSM_LEFT + Align(GetStringBoundingBox(buffer).width, 2) + VPSM_RIGHT;
    01192   _cur_fontsize = FS_NORMAL;
    01193
    01194   this->MarkDirty();
    01195 }
    01196
    01202 void ViewportSign::MarkDirty() const
    01203 {
    01204   /* We use ZOOM_LVL_MAX here, as every viewport can have another zoom,
    01205    *  and there is no way for us to know which is the biggest. So make the
    01206    *  biggest area dirty, and we are safe for sure.
    01207    * We also add 1 to make sure the whole thing is redrawn. */
    01208   MarkAllViewportsDirty(
    01209     this->center - ScaleByZoom(this->width_normal / 2 + 1, ZOOM_LVL_MAX),
    01210     this->top    - ScaleByZoom(1, ZOOM_LVL_MAX),
    01211     this->center + ScaleByZoom(this->width_normal / 2 + 1, ZOOM_LVL_MAX),
    01212     this->top    + ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM + 1, ZOOM_LVL_MAX));
    01213 }
    01214
    01215 static void ViewportDrawTileSprites(const TileSpriteToDrawVector *tstdv)
    01216 {
    01217   const TileSpriteToDraw *tsend = tstdv->End();
    01218   for (const TileSpriteToDraw *ts = tstdv->Begin(); ts != tsend; ++ts) {
    01219     DrawSprite(ts->image, ts->pal, ts->x, ts->y, ts->sub);
    01220   }
    01221 }
    01222
    01224 static void ViewportSortParentSprites(ParentSpriteToSortVector *psdv)
    01225 {
    01226   ParentSpriteToDraw **psdvend = psdv->End();
    01227   ParentSpriteToDraw **psd = psdv->Begin();
    01228   while (psd != psdvend) {
    01229     ParentSpriteToDraw *ps = *psd;
    01230
    01231     if (ps->comparison_done) {
    01232       psd++;
    01233       continue;
    01234     }
    01235
    01236     ps->comparison_done = true;
    01237
    01238     for (ParentSpriteToDraw **psd2 = psd + 1; psd2 != psdvend; psd2++) {
    01239       ParentSpriteToDraw *ps2 = *psd2;
    01240
    01241       if (ps2->comparison_done) continue;
    01242
    01243       /* Decide which comparator to use, based on whether the bounding
    01244        * boxes overlap
    01245        */
    01246       if (ps->xmax >= ps2->xmin && ps->xmin <= ps2->xmax && // overlap in X?
    01247           ps->ymax >= ps2->ymin && ps->ymin <= ps2->ymax && // overlap in Y?
    01248           ps->zmax >= ps2->zmin && ps->zmin <= ps2->zmax) { // overlap in Z?
    01249         /* Use X+Y+Z as the sorting order, so sprites closer to the bottom of
    01250          * the screen and with higher Z elevation, are drawn in front.
    01251          * Here X,Y,Z are the coordinates of the "center of mass" of the sprite,
    01252          * i.e. X=(left+right)/2, etc.
    01253          * However, since we only care about order, don't actually divide / 2
    01254          */
    01255         if (ps->xmin + ps->xmax + ps->ymin + ps->ymax + ps->zmin + ps->zmax <=
    01256             ps2->xmin + ps2->xmax + ps2->ymin + ps2->ymax + ps2->zmin + ps2->zmax) {
    01257           continue;
    01258         }
    01259       } else {
    01260         /* We only change the order, if it is definite.
    01261          * I.e. every single order of X, Y, Z says ps2 is behind ps or they overlap.
    01262          * That is: If one partial order says ps behind ps2, do not change the order.
    01263          */
    01264         if (ps->xmax < ps2->xmin ||
    01265             ps->ymax < ps2->ymin ||
    01266             ps->zmax < ps2->zmin) {
    01267           continue;
    01268         }
    01269       }
    01270
    01271       /* Move ps2 in front of ps */
    01272       ParentSpriteToDraw *temp = ps2;
    01273       for (ParentSpriteToDraw **psd3 = psd2; psd3 > psd; psd3--) {
    01274         *psd3 = *(psd3 - 1);
    01275       }
    01276       *psd = temp;
    01277     }
    01278   }
    01279 }
    01280
    01281 static void ViewportDrawParentSprites(const ParentSpriteToSortVector *psd, const ChildScreenSpriteToDrawVector *csstdv)
    01282 {
    01283   const ParentSpriteToDraw * const *psd_end = psd->End();
    01284   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
    01285     const ParentSpriteToDraw *ps = *it;
    01286     if (ps->image != SPR_EMPTY_BOUNDING_BOX) DrawSprite(ps->image, ps->pal, ps->x, ps->y, ps->sub);
    01287
    01288     int child_idx = ps->first_child;
    01289     while (child_idx >= 0) {
    01290       const ChildScreenSpriteToDraw *cs = csstdv->Get(child_idx);
    01291       child_idx = cs->next;
    01292       DrawSprite(cs->image, cs->pal, ps->left + cs->x, ps->top + cs->y, cs->sub);
    01293     }
    01294   }
    01295 }
    01296
    01301 static void ViewportDrawBoundingBoxes(const ParentSpriteToSortVector *psd)
    01302 {
    01303   const ParentSpriteToDraw * const *psd_end = psd->End();
    01304   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
    01305     const ParentSpriteToDraw *ps = *it;
    01306     Point pt1 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmax + 1); // top front corner
    01307     Point pt2 = RemapCoords(ps->xmin    , ps->ymax + 1, ps->zmax + 1); // top left corner
    01308     Point pt3 = RemapCoords(ps->xmax + 1, ps->ymin    , ps->zmax + 1); // top right corner
    01309     Point pt4 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmin    ); // bottom front corner
    01310
    01311     DrawBox(        pt1.x,         pt1.y,
    01312             pt2.x - pt1.x, pt2.y - pt1.y,
    01313             pt3.x - pt1.x, pt3.y - pt1.y,
    01314             pt4.x - pt1.x, pt4.y - pt1.y);
    01315   }
    01316 }
    01317
    01318 static void ViewportDrawStrings(DrawPixelInfo *dpi, const StringSpriteToDrawVector *sstdv)
    01319 {
    01320   DrawPixelInfo dp;
    01321   ZoomLevel zoom;
    01322
    01323   _cur_dpi = &dp;
    01324   dp = *dpi;
    01325
    01326   zoom = dp.zoom;
    01327   dp.zoom = ZOOM_LVL_NORMAL;
    01328
    01329   dp.left   = UnScaleByZoom(dp.left,   zoom);
    01330   dp.top    = UnScaleByZoom(dp.top,    zoom);
    01331   dp.width  = UnScaleByZoom(dp.width,  zoom);
    01332   dp.height = UnScaleByZoom(dp.height, zoom);
    01333
    01334   const StringSpriteToDraw *ssend = sstdv->End();
    01335   for (const StringSpriteToDraw *ss = sstdv->Begin(); ss != ssend; ++ss) {
    01336     TextColour colour = TC_BLACK;
    01337     bool small = HasBit(ss->width, 15);
    01338     int w = GB(ss->width, 0, 15);
    01339     int x = UnScaleByZoom(ss->x, zoom);
    01340     int y = UnScaleByZoom(ss->y, zoom);
    01341     int h = VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM;
    01342
    01343     SetDParam(0, ss->params[0]);
    01344     SetDParam(1, ss->params[1]);
    01345
    01346     if (ss->colour != INVALID_COLOUR) {
    01347       /* Do not draw signs nor station names if they are set invisible */
    01348       if (IsInvisibilitySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) continue;
    01349
    01350       /* if we didn't draw a rectangle, or if transparant building is on,
    01351        * draw the text in the colour the rectangle would have */
    01352       if (IsTransparencySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) {
    01353         /* Real colours need the IS_PALETTE_COLOUR flag
    01354          * otherwise colours from _string_colourmap are assumed. */
    01355         colour = (TextColour)_colour_gradient[ss->colour][6] | IS_PALETTE_COLOUR;
    01356       }
    01357
    01358       /* Draw the rectangle if 'tranparent station signs' is off,
    01359        * or if we are drawing a general text sign (STR_WHITE_SIGN) */
    01360       if (!IsTransparencySet(TO_SIGNS) || ss->string == STR_WHITE_SIGN) {
    01361         DrawFrameRect(
    01362           x, y, x + w, y + h, ss->colour,
    01363           IsTransparencySet(TO_SIGNS) ? FR_TRANSPARENT : FR_NONE
    01364         );
    01365       }
    01366     }
    01367
    01368     DrawString(x + VPSM_LEFT, x + w - 1 - VPSM_RIGHT, y + VPSM_TOP, ss->string, colour, SA_CENTER);
    01369   }
    01370 }
    01371
    01372 void ViewportDoDraw(const ViewPort *vp, int left, int top, int right, int bottom)
    01373 {
    01374   DrawPixelInfo *old_dpi = _cur_dpi;
    01375   _cur_dpi = &_vd.dpi;
    01376
    01377   _vd.dpi.zoom = vp->zoom;
    01378   int mask = ScaleByZoom(-1, vp->zoom);
    01379
    01380   _vd.combine_sprites = SPRITE_COMBINE_NONE;
    01381
    01382   _vd.dpi.width = (right - left) & mask;
    01383   _vd.dpi.height = (bottom - top) & mask;
    01384   _vd.dpi.left = left & mask;
    01385   _vd.dpi.top = top & mask;
    01386   _vd.dpi.pitch = old_dpi->pitch;
    01387   _vd.last_child = NULL;
    01388
    01389   int x = UnScaleByZoom(_vd.dpi.left - (vp->virtual_left & mask), vp->zoom) + vp->left;
    01390   int y = UnScaleByZoom(_vd.dpi.top - (vp->virtual_top & mask), vp->zoom) + vp->top;
    01391
    01392   _vd.dpi.dst_ptr = BlitterFactoryBase::GetCurrentBlitter()->MoveTo(old_dpi->dst_ptr, x - old_dpi->left, y - old_dpi->top);
    01393
    01394   ViewportAddLandscape();
    01395   ViewportAddVehicles(&_vd.dpi);
    01396
    01397   ViewportAddTownNames(&_vd.dpi);
    01398   ViewportAddStationNames(&_vd.dpi);
    01399   ViewportAddSigns(&_vd.dpi);
    01400
    01401   DrawTextEffects(&_vd.dpi);
    01402
    01403   if (_vd.tile_sprites_to_draw.Length() != 0) ViewportDrawTileSprites(&_vd.tile_sprites_to_draw);
    01404
    01405   ParentSpriteToDraw *psd_end = _vd.parent_sprites_to_draw.End();
    01406   for (ParentSpriteToDraw *it = _vd.parent_sprites_to_draw.Begin(); it != psd_end; it++) {
    01407     *_vd.parent_sprites_to_sort.Append() = it;
    01408   }
    01409
    01410   ViewportSortParentSprites(&_vd.parent_sprites_to_sort);
    01411   ViewportDrawParentSprites(&_vd.parent_sprites_to_sort, &_vd.child_screen_sprites_to_draw);
    01412
    01413   if (_draw_bounding_boxes) ViewportDrawBoundingBoxes(&_vd.parent_sprites_to_sort);
    01414
    01415   if (_vd.string_sprites_to_draw.Length() != 0) ViewportDrawStrings(&_vd.dpi, &_vd.string_sprites_to_draw);
    01416
    01417   _cur_dpi = old_dpi;
    01418
    01419   _vd.string_sprites_to_draw.Clear();
    01420   _vd.tile_sprites_to_draw.Clear();
    01421   _vd.parent_sprites_to_draw.Clear();
    01422   _vd.parent_sprites_to_sort.Clear();
    01423   _vd.child_screen_sprites_to_draw.Clear();
    01424 }
    01425
    01428 static void ViewportDrawChk(const ViewPort *vp, int left, int top, int right, int bottom)
    01429 {
    01430   if (ScaleByZoom(bottom - top, vp->zoom) * ScaleByZoom(right - left, vp->zoom) > 180000) {
    01431     if ((bottom - top) > (right - left)) {
    01432       int t = (top + bottom) >> 1;
    01433       ViewportDrawChk(vp, left, top, right, t);
    01434       ViewportDrawChk(vp, left, t, right, bottom);
    01435     } else {
    01436       int t = (left + right) >> 1;
    01437       ViewportDrawChk(vp, left, top, t, bottom);
    01438       ViewportDrawChk(vp, t, top, right, bottom);
    01439     }
    01440   } else {
    01441     ViewportDoDraw(vp,
    01442       ScaleByZoom(left - vp->left, vp->zoom) + vp->virtual_left,
    01443       ScaleByZoom(top - vp->top, vp->zoom) + vp->virtual_top,
    01444       ScaleByZoom(right - vp->left, vp->zoom) + vp->virtual_left,
    01445       ScaleByZoom(bottom - vp->top, vp->zoom) + vp->virtual_top
    01446     );
    01447   }
    01448 }
    01449
    01450 static inline void ViewportDraw(const ViewPort *vp, int left, int top, int right, int bottom)
    01451 {
    01452   if (right <= vp->left || bottom <= vp->top) return;
    01453
    01454   if (left >= vp->left + vp->width) return;
    01455
    01456   if (left < vp->left) left = vp->left;
    01457   if (right > vp->left + vp->width) right = vp->left + vp->width;
    01458
    01459   if (top >= vp->top + vp->height) return;
    01460
    01461   if (top < vp->top) top = vp->top;
    01462   if (bottom > vp->top + vp->height) bottom = vp->top + vp->height;
    01463
    01464   ViewportDrawChk(vp, left, top, right, bottom);
    01465 }
    01466
    01470 void Window::DrawViewport() const
    01471 {
    01472   DrawPixelInfo *dpi = _cur_dpi;
    01473
    01474   dpi->left += this->left;
    01475   dpi->top += this->top;
    01476
    01477   ViewportDraw(this->viewport, dpi->left, dpi->top, dpi->left + dpi->width, dpi->top + dpi->height);
    01478
    01479   dpi->left -= this->left;
    01480   dpi->top -= this->top;
    01481 }
    01482
    01483 static inline void ClampViewportToMap(const ViewPort *vp, int &x, int &y)
    01484 {
    01485   /* Centre of the viewport is hot spot */
    01486   x += vp->virtual_width / 2;
    01487   y += vp->virtual_height / 2;
    01488
    01489   /* Convert viewport coordinates to map coordinates
    01490    * Calculation is scaled by 4 to avoid rounding errors */
    01491   int vx = -x + y * 2;
    01492   int vy =  x + y * 2;
    01493
    01494   /* clamp to size of map */
    01495   vx = Clamp(vx, 0, MapMaxX() * TILE_SIZE * 4);
    01496   vy = Clamp(vy, 0, MapMaxY() * TILE_SIZE * 4);
    01497
    01498   /* Convert map coordinates to viewport coordinates */
    01499   x = (-vx + vy) / 2;
    01500   y = ( vx + vy) / 4;
    01501
    01502   /* Remove centreing */
    01503   x -= vp->virtual_width / 2;
    01504   y -= vp->virtual_height / 2;
    01505 }
    01506
    01511 void UpdateViewportPosition(Window *w)
    01512 {
    01513   const ViewPort *vp = w->viewport;
    01514
    01515   if (w->viewport->follow_vehicle != INVALID_VEHICLE) {
    01516     const Vehicle *veh = Vehicle::Get(w->viewport->follow_vehicle);
    01517     Point pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
    01518
    01519     w->viewport->scrollpos_x = pt.x;
    01520     w->viewport->scrollpos_y = pt.y;
    01521     SetViewportPosition(w, pt.x, pt.y);
    01522   } else {
    01523     /* Ensure the destination location is within the map */
    01524     ClampViewportToMap(vp, w->viewport->dest_scrollpos_x, w->viewport->dest_scrollpos_y);
    01525
    01526     int delta_x = w->viewport->dest_scrollpos_x - w->viewport->scrollpos_x;
    01527     int delta_y = w->viewport->dest_scrollpos_y - w->viewport->scrollpos_y;
    01528
    01529     if (delta_x != 0 || delta_y != 0) {
    01530       if (_settings_client.gui.smooth_scroll) {
    01531         int max_scroll = ScaleByMapSize1D(512);
    01532         /* Not at our desired positon yet... */
    01533         w->viewport->scrollpos_x += Clamp(delta_x / 4, -max_scroll, max_scroll);
    01534         w->viewport->scrollpos_y += Clamp(delta_y / 4, -max_scroll, max_scroll);
    01535       } else {
    01536         w->viewport->scrollpos_x = w->viewport->dest_scrollpos_x;
    01537         w->viewport->scrollpos_y = w->viewport->dest_scrollpos_y;
    01538       }
    01539     }
    01540
    01541     ClampViewportToMap(vp, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
    01542
    01543     SetViewportPosition(w, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
    01544   }
    01545 }
    01546
    01556 static void MarkViewportDirty(const ViewPort *vp, int left, int top, int right, int bottom)
    01557 {
    01558   right -= vp->virtual_left;
    01559   if (right <= 0) return;
    01560
    01561   bottom -= vp->virtual_top;
    01562   if (bottom <= 0) return;
    01563
    01564   left = max(0, left - vp->virtual_left);
    01565
    01566   if (left >= vp->virtual_width) return;
    01567
    01568   top = max(0, top - vp->virtual_top);
    01569
    01570   if (top >= vp->virtual_height) return;
    01571
    01572   SetDirtyBlocks(
    01573     UnScaleByZoomLower(left, vp->zoom) + vp->left,
    01574     UnScaleByZoomLower(top, vp->zoom) + vp->top,
    01575     UnScaleByZoom(right, vp->zoom) + vp->left + 1,
    01576     UnScaleByZoom(bottom, vp->zoom) + vp->top + 1
    01577   );
    01578 }
    01579
    01588 void MarkAllViewportsDirty(int left, int top, int right, int bottom)
    01589 {
    01590   Window *w;
    01591   FOR_ALL_WINDOWS_FROM_BACK(w) {
    01592     ViewPort *vp = w->viewport;
    01593     if (vp != NULL) {
    01594       assert(vp->width != 0);
    01595       MarkViewportDirty(vp, left, top, right, bottom);
    01596     }
    01597   }
    01598 }
    01599
    01600 void MarkTileDirtyByTile(TileIndex tile)
    01601 {
    01602   Point pt = RemapCoords(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, GetTileZ(tile));
    01603   MarkAllViewportsDirty(
    01604     pt.x - 31,
    01605     pt.y - 122,
    01606     pt.x - 31 + 67,
    01607     pt.y - 122 + 154
    01608   );
    01609 }
    01610
    01618 static void SetSelectionTilesDirty()
    01619 {
    01620   int x_start = _thd.pos.x;
    01621   int y_start = _thd.pos.y;
    01622
    01623   int x_size = _thd.size.x;
    01624   int y_size = _thd.size.y;
    01625
    01626   if (_thd.outersize.x != 0) {
    01627     x_size  += _thd.outersize.x;
    01628     x_start += _thd.offs.x;
    01629     y_size  += _thd.outersize.y;
    01630     y_start += _thd.offs.y;
    01631   }
    01632
    01633   x_size -= TILE_SIZE;
    01634   y_size -= TILE_SIZE;
    01635
    01636   assert(x_size >= 0);
    01637   assert(y_size >= 0);
    01638
    01639   int x_end = Clamp(x_start + x_size, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
    01640   int y_end = Clamp(y_start + y_size, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
    01641
    01642   x_start = Clamp(x_start, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
    01643   y_start = Clamp(y_start, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
    01644
    01645   /* make sure everything is multiple of TILE_SIZE */
    01646   assert((x_end | y_end | x_start | y_start) % TILE_SIZE == 0);
    01647
    01648   /* How it works:
    01649    * Suppose we have to mark dirty rectangle of 3x4 tiles:
    01650    *   x
    01651    *  xxx
    01652    * xxxxx
    01653    *  xxxxx
    01654    *   xxx
    01655    *    x
    01656    * This algorithm marks dirty columns of tiles, so it is done in 3+4-1 steps:
    01657    * 1)  x     2)  x
    01658    *    xxx       Oxx
    01659    *   Oxxxx     xOxxx
    01660    *    xxxxx     Oxxxx
    01661    *     xxx       xxx
    01662    *      x         x
    01663    * And so forth...
    01664    */
    01665
    01666   int top_x = x_end; // coordinates of top dirty tile
    01667   int top_y = y_start;
    01668   int bot_x = top_x; // coordinates of bottom dirty tile
    01669   int bot_y = top_y;
    01670
    01671   do {
    01672     Point top = RemapCoords2(top_x, top_y); // topmost dirty point
    01673     Point bot = RemapCoords2(bot_x + TILE_SIZE - 1, bot_y + TILE_SIZE - 1); // bottommost point
    01674
    01675     /* the 'x' coordinate of 'top' and 'bot' is the same (and always in the same distance from tile middle),
    01676      * tile height/slope affects only the 'y' on-screen coordinate! */
    01677
    01678     int l = top.x - (TILE_PIXELS - 2); // 'x' coordinate of left side of dirty rectangle
    01679     int t = top.y;                     // 'y' coordinate of top side -//-
    01680     int r = top.x + (TILE_PIXELS - 2); // right side of dirty rectangle
    01681     int b = bot.y;                     // bottom -//-
    01682
    01683     static const int OVERLAY_WIDTH = 4; // part of selection sprites is drawn outside the selected area
    01684
    01685     /* For halftile foundations on SLOPE_STEEP_S the sprite extents some more towards the top */
    01686     MarkAllViewportsDirty(l - OVERLAY_WIDTH, t - OVERLAY_WIDTH - TILE_HEIGHT, r + OVERLAY_WIDTH, b + OVERLAY_WIDTH);
    01687
    01688     /* haven't we reached the topmost tile yet? */
    01689     if (top_x != x_start) {
    01690       top_x -= TILE_SIZE;
    01691     } else {
    01692       top_y += TILE_SIZE;
    01693     }
    01694
    01695     /* the way the bottom tile changes is different when we reach the bottommost tile */
    01696     if (bot_y != y_end) {
    01697       bot_y += TILE_SIZE;
    01698     } else {
    01699       bot_x -= TILE_SIZE;
    01700     }
    01701   } while (bot_x >= top_x);
    01702 }
    01703
    01704
    01705 void SetSelectionRed(bool b)
    01706 {
    01707   _thd.make_square_red = b;
    01708   SetSelectionTilesDirty();
    01709 }
    01710
    01719 static bool CheckClickOnViewportSign(const ViewPort *vp, int x, int y, const ViewportSign *sign)
    01720 {
    01721   bool small = (vp->zoom >= ZOOM_LVL_OUT_4X);
    01722   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, vp->zoom);
    01723   int sign_height = ScaleByZoom(VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM, vp->zoom);
    01724
    01725   x = ScaleByZoom(x - vp->left, vp->zoom) + vp->virtual_left;
    01726   y = ScaleByZoom(y - vp->top, vp->zoom) + vp->virtual_top;
    01727
    01728   return
    01729       y >= sign->top &&
    01730       y <  sign->top + sign_height &&
    01731       x >= sign->center - sign_half_width &&
    01732       x <  sign->center + sign_half_width;
    01733 }
    01734
    01735 static bool CheckClickOnTown(const ViewPort *vp, int x, int y)
    01736 {
    01737   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES)) return false;
    01738
    01739   const Town *t;
    01740   FOR_ALL_TOWNS(t) {
    01741     if (CheckClickOnViewportSign(vp, x, y, &t->sign)) {
    01742       ShowTownViewWindow(t->index);
    01743       return true;
    01744     }
    01745   }
    01746
    01747   return false;
    01748 }
    01749
    01750 static bool CheckClickOnStation(const ViewPort *vp, int x, int y)
    01751 {
    01752   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || IsInvisibilitySet(TO_SIGNS)) return false;
    01753
    01754   const BaseStation *st;
    01755   FOR_ALL_BASE_STATIONS(st) {
    01756     /* Check whether the base station is a station or a waypoint */
    01757     bool is_station = Station::IsExpected(st);
    01758
    01759     /* Don't check if the display options are disabled */
    01760     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
    01761
    01762     if (CheckClickOnViewportSign(vp, x, y, &st->sign)) {
    01763       if (is_station) {
    01764         ShowStationViewWindow(st->index);
    01765       } else {
    01766         ShowWaypointWindow(Waypoint::From(st));
    01767       }
    01768       return true;
    01769     }
    01770   }
    01771
    01772   return false;
    01773 }
    01774
    01775
    01776 static bool CheckClickOnSign(const ViewPort *vp, int x, int y)
    01777 {
    01778   /* Signs are turned off, or they are transparent and invisibility is ON, or company is a spectator */
    01779   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS) || _local_company == COMPANY_SPECTATOR) return false;
    01780
    01781   const Sign *si;
    01782   FOR_ALL_SIGNS(si) {
    01783     if (CheckClickOnViewportSign(vp, x, y, &si->sign)) {
    01784       HandleClickOnSign(si);
    01785       return true;
    01786     }
    01787   }
    01788
    01789   return false;
    01790 }
    01791
    01792
    01793 static bool CheckClickOnLandscape(const ViewPort *vp, int x, int y)
    01794 {
    01795   Point pt = TranslateXYToTileCoord(vp, x, y);
    01796
    01797   if (pt.x != -1) return ClickTile(TileVirtXY(pt.x, pt.y));
    01798   return true;
    01799 }
    01800
    01801
    01802 bool HandleViewportClicked(const ViewPort *vp, int x, int y)
    01803 {
    01804   const Vehicle *v;
    01805
    01806   if (CheckClickOnTown(vp, x, y)) return true;
    01807   if (CheckClickOnStation(vp, x, y)) return true;
    01808   if (CheckClickOnSign(vp, x, y)) return true;
    01809   CheckClickOnLandscape(vp, x, y);
    01810
    01811   v = CheckClickOnVehicle(vp, x, y);
    01812   if (v != NULL) {
    01813     DEBUG(misc, 2, "Vehicle %d (index %d) at %p", v->unitnumber, v->index, v);
    01814     if (IsCompanyBuildableVehicleType(v)) ShowVehicleViewWindow(v->First());
    01815     return true;
    01816   }
    01817   return CheckClickOnLandscape(vp, x, y);
    01818 }
    01819
    01820 Vehicle *CheckMouseOverVehicle()
    01821 {
    01822   const Window *w;
    01823   const ViewPort *vp;
    01824
    01825   int x = _cursor.pos.x;
    01826   int y = _cursor.pos.y;
    01827
    01828   w = FindWindowFromPt(x, y);
    01829   if (w == NULL) return NULL;
    01830
    01831   vp = IsPtInWindowViewport(w, x, y);
    01832   return (vp != NULL) ? CheckClickOnVehicle(vp, x, y) : NULL;
    01833 }
    01834
    01835
    01836
    01837 void PlaceObject()
    01838 {
    01839   Point pt;
    01840   Window *w;
    01841
    01842   pt = GetTileBelowCursor();
    01843   if (pt.x == -1) return;
    01844
    01845   if (_thd.place_mode == HT_POINT) {
    01846     pt.x += 8;
    01847     pt.y += 8;
    01848   }
    01849
    01850   _tile_fract_coords.x = pt.x & TILE_UNIT_MASK;
    01851   _tile_fract_coords.y = pt.y & TILE_UNIT_MASK;
    01852
    01853   w = GetCallbackWnd();
    01854   if (w != NULL) w->OnPlaceObject(pt, TileVirtXY(pt.x, pt.y));
    01855 }
    01856
    01857
    01866 bool ScrollWindowTo(int x, int y, int z, Window *w, bool instant)
    01867 {
    01868   /* The slope cannot be acquired outside of the map, so make sure we are always within the map. */
    01869   if (z == -1) z = GetSlopeZ(Clamp(x, 0, MapSizeX() * TILE_SIZE - 1), Clamp(y, 0, MapSizeY() * TILE_SIZE - 1));
    01870
    01871   Point pt = MapXYZToViewport(w->viewport, x, y, z);
    01872   w->viewport->follow_vehicle = INVALID_VEHICLE;
    01873
    01874   if (w->viewport->dest_scrollpos_x == pt.x && w->viewport->dest_scrollpos_y == pt.y)
    01875     return false;
    01876
    01877   if (instant) {
    01878     w->viewport->scrollpos_x = pt.x;
    01879     w->viewport->scrollpos_y = pt.y;
    01880   }
    01881
    01882   w->viewport->dest_scrollpos_x = pt.x;
    01883   w->viewport->dest_scrollpos_y = pt.y;
    01884   return true;
    01885 }
    01886
    01887 bool ScrollMainWindowToTile(TileIndex tile, bool instant)
    01888 {
    01889   return ScrollMainWindowTo(TileX(tile) * TILE_SIZE + TILE_SIZE / 2, TileY(tile) * TILE_SIZE + TILE_SIZE / 2, -1, instant);
    01890 }
    01891
    01892 void SetRedErrorSquare(TileIndex tile)
    01893 {
    01894   TileIndex old;
    01895
    01896   old = _thd.redsq;
    01897   _thd.redsq = tile;
    01898
    01899   if (tile != old) {
    01900     if (tile != INVALID_TILE) MarkTileDirtyByTile(tile);
    01901     if (old  != INVALID_TILE) MarkTileDirtyByTile(old);
    01902   }
    01903 }
    01904
    01909 void SetTileSelectSize(int w, int h)
    01910 {
    01911   _thd.new_size.x = w * TILE_SIZE;
    01912   _thd.new_size.y = h * TILE_SIZE;
    01913   _thd.new_outersize.x = 0;
    01914   _thd.new_outersize.y = 0;
    01915 }
    01916
    01917 void SetTileSelectBigSize(int ox, int oy, int sx, int sy)
    01918 {
    01919   _thd.offs.x = ox * TILE_SIZE;
    01920   _thd.offs.y = oy * TILE_SIZE;
    01921   _thd.new_outersize.x = sx * TILE_SIZE;
    01922   _thd.new_outersize.y = sy * TILE_SIZE;
    01923 }
    01924
    01926 static HighLightStyle GetAutorailHT(int x, int y)
    01927 {
    01928   return HT_RAIL | _autorail_piece[x & TILE_UNIT_MASK][y & TILE_UNIT_MASK];
    01929 }
    01930
    01938 void UpdateTileSelection()
    01939 {
    01940   int x1;
    01941   int y1;
    01942
    01943   _thd.new_drawstyle = HT_NONE;
    01944
    01945   if (_thd.place_mode == HT_SPECIAL) {
    01946     x1 = _thd.selend.x;
    01947     y1 = _thd.selend.y;
    01948     if (x1 != -1) {
    01949       int x2 = _thd.selstart.x & ~TILE_UNIT_MASK;
    01950       int y2 = _thd.selstart.y & ~TILE_UNIT_MASK;
    01951       x1 &= ~TILE_UNIT_MASK;
    01952       y1 &= ~TILE_UNIT_MASK;
    01953
    01954       if (x1 >= x2) Swap(x1, x2);
    01955       if (y1 >= y2) Swap(y1, y2);
    01956       _thd.new_pos.x = x1;
    01957       _thd.new_pos.y = y1;
    01958       _thd.new_size.x = x2 - x1 + TILE_SIZE;
    01959       _thd.new_size.y = y2 - y1 + TILE_SIZE;
    01960       _thd.new_drawstyle = _thd.next_drawstyle;
    01961     }
    01962   } else if (_thd.place_mode != HT_NONE) {
    01963     Point pt = GetTileBelowCursor();
    01964     x1 = pt.x;
    01965     y1 = pt.y;
    01966     if (x1 != -1) {
    01967       switch (_thd.place_mode & HT_DRAG_MASK) {
    01968         case HT_RECT:
    01969           _thd.new_drawstyle = HT_RECT;
    01970           break;
    01971         case HT_POINT:
    01972           _thd.new_drawstyle = HT_POINT;
    01973           x1 += TILE_SIZE / 2;
    01974           y1 += TILE_SIZE / 2;
    01975           break;
    01976         case HT_RAIL:
    01977           /* Draw one highlighted tile in any direction */
    01978           _thd.new_drawstyle = GetAutorailHT(pt.x, pt.y);
    01979           break;
    01980         case HT_LINE:
    01981           switch (_thd.place_mode & HT_DIR_MASK) {
    01982             case HT_DIR_X: _thd.new_drawstyle = HT_LINE | HT_DIR_X; break;
    01983             case HT_DIR_Y: _thd.new_drawstyle = HT_LINE | HT_DIR_Y; break;
    01984
    01985             case HT_DIR_HU:
    01986             case HT_DIR_HL:
    01987               _thd.new_drawstyle = (pt.x & TILE_UNIT_MASK) + (pt.y & TILE_UNIT_MASK) <= TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
    01988               break;
    01989
    01990             case HT_DIR_VL:
    01991             case HT_DIR_VR:
    01992               _thd.new_drawstyle = (pt.x & TILE_UNIT_MASK) > (pt.y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    01993               break;
    01994
    01995             default: NOT_REACHED();
    01996           }
    01997           _thd.selstart.x = x1 & ~TILE_UNIT_MASK;
    01998           _thd.selstart.y = y1 & ~TILE_UNIT_MASK;
    01999           break;
    02000         default:
    02001           NOT_REACHED();
    02002           break;
    02003       }
    02004       _thd.new_pos.x = x1 & ~TILE_UNIT_MASK;
    02005       _thd.new_pos.y = y1 & ~TILE_UNIT_MASK;
    02006     }
    02007   }
    02008
    02009   /* redraw selection */
    02010   if (_thd.drawstyle != _thd.new_drawstyle ||
    02011       _thd.pos.x != _thd.new_pos.x || _thd.pos.y != _thd.new_pos.y ||
    02012       _thd.size.x != _thd.new_size.x || _thd.size.y != _thd.new_size.y ||
    02013       _thd.outersize.x != _thd.new_outersize.x ||
    02014       _thd.outersize.y != _thd.new_outersize.y) {
    02015     /* clear the old selection? */
    02016     if (_thd.drawstyle) SetSelectionTilesDirty();
    02017
    02018     _thd.drawstyle = _thd.new_drawstyle;
    02019     _thd.pos = _thd.new_pos;
    02020     _thd.size = _thd.new_size;
    02021     _thd.outersize = _thd.new_outersize;
    02022     _thd.dirty = 0xff;
    02023
    02024     /* draw the new selection? */
    02025     if (_thd.new_drawstyle) SetSelectionTilesDirty();
    02026   }
    02027 }
    02028
    02034 static inline void ShowMeasurementTooltips(StringID str, uint paramcount, const uint64 params[])
    02035 {
    02036   if (!_settings_client.gui.measure_tooltip) return;
    02037   GuiShowTooltips(str, paramcount, params, true);
    02038 }
    02039
    02041 void VpStartPlaceSizing(TileIndex tile, ViewportPlaceMethod method, ViewportDragDropSelectionProcess process)
    02042 {
    02043   _thd.select_method = method;
    02044   _thd.select_proc   = process;
    02045   _thd.selend.x = TileX(tile) * TILE_SIZE;
    02046   _thd.selstart.x = TileX(tile) * TILE_SIZE;
    02047   _thd.selend.y = TileY(tile) * TILE_SIZE;
    02048   _thd.selstart.y = TileY(tile) * TILE_SIZE;
    02049
    02050   /* Needed so several things (road, autoroad, bridges, ...) are placed correctly.
    02051    * In effect, placement starts from the centre of a tile
    02052    */
    02053   if (method == VPM_X_OR_Y || method == VPM_FIX_X || method == VPM_FIX_Y) {
    02054     _thd.selend.x += TILE_SIZE / 2;
    02055     _thd.selend.y += TILE_SIZE / 2;
    02056     _thd.selstart.x += TILE_SIZE / 2;
    02057     _thd.selstart.y += TILE_SIZE / 2;
    02058   }
    02059
    02060   if (_thd.place_mode == HT_RECT) {
    02061     _thd.place_mode = HT_SPECIAL;
    02062     _thd.next_drawstyle = HT_RECT;
    02063   } else if (_thd.place_mode & (HT_RAIL | HT_LINE)) {
    02064     _thd.place_mode = HT_SPECIAL;
    02065     _thd.next_drawstyle = _thd.drawstyle;
    02066   } else {
    02067     _thd.place_mode = HT_SPECIAL;
    02068     _thd.next_drawstyle = HT_POINT;
    02069   }
    02070   _special_mouse_mode = WSM_SIZING;
    02071 }
    02072
    02073 void VpSetPlaceSizingLimit(int limit)
    02074 {
    02075   _thd.sizelimit = limit;
    02076 }
    02077
    02082 void VpSetPresizeRange(TileIndex from, TileIndex to)
    02083 {
    02084   uint64 distance = DistanceManhattan(from, to) + 1;
    02085
    02086   _thd.selend.x = TileX(to) * TILE_SIZE;
    02087   _thd.selend.y = TileY(to) * TILE_SIZE;
    02088   _thd.selstart.x = TileX(from) * TILE_SIZE;
    02089   _thd.selstart.y = TileY(from) * TILE_SIZE;
    02090   _thd.next_drawstyle = HT_RECT;
    02091
    02092   /* show measurement only if there is any length to speak of */
    02093   if (distance > 1) ShowMeasurementTooltips(STR_MEASURE_LENGTH, 1, &distance);
    02094 }
    02095
    02096 static void VpStartPreSizing()
    02097 {
    02098   _thd.selend.x = -1;
    02099   _special_mouse_mode = WSM_PRESIZE;
    02100 }
    02101
    02104 static HighLightStyle Check2x1AutoRail(int mode)
    02105 {
    02106   int fxpy = _tile_fract_coords.x + _tile_fract_coords.y;
    02107   int sxpy = (_thd.selend.x & TILE_UNIT_MASK) + (_thd.selend.y & TILE_UNIT_MASK);
    02108   int fxmy = _tile_fract_coords.x - _tile_fract_coords.y;
    02109   int sxmy = (_thd.selend.x & TILE_UNIT_MASK) - (_thd.selend.y & TILE_UNIT_MASK);
    02110
    02111   switch (mode) {
    02112     default: NOT_REACHED();
    02113     case 0: // end piece is lower right
    02114       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
    02115       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
    02116       return HT_DIR_Y;
    02117
    02118     case 1:
    02119       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
    02120       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
    02121       return HT_DIR_Y;
    02122
    02123     case 2:
    02124       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
    02125       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
    02126       return HT_DIR_X;
    02127
    02128     case 3:
    02129       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
    02130       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
    02131       return HT_DIR_X;
    02132   }
    02133 }
    02134
    02146 static bool SwapDirection(HighLightStyle style, TileIndex start_tile, TileIndex end_tile)
    02147 {
    02148   uint start_x = TileX(start_tile);
    02149   uint start_y = TileY(start_tile);
    02150   uint end_x = TileX(end_tile);
    02151   uint end_y = TileY(end_tile);
    02152
    02153   switch (style & HT_DRAG_MASK) {
    02154     case HT_RAIL:
    02155     case HT_LINE: return (end_x > start_x || (end_x == start_x && end_y > start_y));
    02156
    02157     case HT_RECT:
    02158     case HT_POINT: return (end_x != start_x && end_y < start_y);
    02159     default: NOT_REACHED();
    02160   }
    02161
    02162   return false;
    02163 }
    02164
    02179 static int CalcHeightdiff(HighLightStyle style, uint distance, TileIndex start_tile, TileIndex end_tile)
    02180 {
    02181   bool swap = SwapDirection(style, start_tile, end_tile);
    02182   byte style_t;
    02183   uint h0, h1, ht; // start heigth, end height, and temp variable
    02184
    02185   if (start_tile == end_tile) return 0;
    02186   if (swap) Swap(start_tile, end_tile);
    02187
    02188   switch (style & HT_DRAG_MASK) {
    02189     case HT_RECT: {
    02190       static const TileIndexDiffC heightdiff_area_by_dir[] = {
    02191         /* Start */ {1, 0}, /* Dragging east */ {0, 0}, // Dragging south
    02192         /* End   */ {0, 1}, /* Dragging east */ {1, 1}  // Dragging south
    02193       };
    02194
    02195       /* In the case of an area we can determine whether we were dragging south or
    02196        * east by checking the X-coordinates of the tiles */
    02197       style_t = (byte)(TileX(end_tile) > TileX(start_tile));
    02198       start_tile = TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_area_by_dir[style_t]));
    02199       end_tile   = TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_area_by_dir[2 + style_t]));
    02200     }
    02201     /* Fallthrough */
    02202     case HT_POINT:
    02203       h0 = TileHeight(start_tile);
    02204       h1 = TileHeight(end_tile);
    02205       break;
    02206     default: { // All other types, this is mostly only line/autorail
    02207       static const HighLightStyle flip_style_direction[] = {
    02208         HT_DIR_X, HT_DIR_Y, HT_DIR_HL, HT_DIR_HU, HT_DIR_VR, HT_DIR_VL
    02209       };
    02210       static const TileIndexDiffC heightdiff_line_by_dir[] = {
    02211         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_X  */ {0, 1}, {1, 1}, // HT_DIR_Y
    02212         /* Start */ {1, 0}, {0, 0}, /* HT_DIR_HU */ {1, 0}, {1, 1}, // HT_DIR_HL
    02213         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_VL */ {0, 1}, {1, 1}, // HT_DIR_VR
    02214
    02215         /* Start */ {0, 1}, {0, 0}, /* HT_DIR_X  */ {1, 0}, {0, 0}, // HT_DIR_Y
    02216         /* End   */ {0, 1}, {0, 0}, /* HT_DIR_HU */ {1, 1}, {0, 1}, // HT_DIR_HL
    02217         /* End   */ {1, 0}, {0, 0}, /* HT_DIR_VL */ {0, 0}, {0, 1}, // HT_DIR_VR
    02218       };
    02219
    02220       distance %= 2; // we're only interested if the distance is even or uneven
    02221       style &= HT_DIR_MASK;
    02222
    02223       /* To handle autorail, we do some magic to be able to use a lookup table.
    02224        * Firstly if we drag the other way around, we switch start&end, and if needed
    02225        * also flip the drag-position. Eg if it was on the left, and the distance is even
    02226        * that means the end, which is now the start is on the right */
    02227       if (swap && distance == 0) style = flip_style_direction[style];
    02228
    02229       /* Use lookup table for start-tile based on HighLightStyle direction */
    02230       style_t = style * 2;
    02231       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
    02232       h0 = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t])));
    02233       ht = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t + 1])));
    02234       h0 = max(h0, ht);
    02235
    02236       /* Use lookup table for end-tile based on HighLightStyle direction
    02237        * flip around side (lower/upper, left/right) based on distance */
    02238       if (distance == 0) style_t = flip_style_direction[style] * 2;
    02239       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
    02240       h1 = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t])));
    02241       ht = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t + 1])));
    02242       h1 = max(h1, ht);
    02243     } break;
    02244   }
    02245
    02246   if (swap) Swap(h0, h1);
    02247   /* Minimap shows height in intervals of 25 meters, let's do the same */
    02248   return (int)(h1 - h0) * 25;
    02249 }
    02250
    02251 static const StringID measure_strings_length[] = {STR_NULL, STR_MEASURE_LENGTH, STR_MEASURE_LENGTH_HEIGHTDIFF};
    02252
    02259 static void CheckUnderflow(int &test, int &other, int mult)
    02260 {
    02261   if (test >= 0) return;
    02262
    02263   other += mult * test;
    02264   test = 0;
    02265 }
    02266
    02274 static void CheckOverflow(int &test, int &other, int max, int mult)
    02275 {
    02276   if (test <= max) return;
    02277
    02278   other += mult * (test - max);
    02279   test = max;
    02280 }
    02281
    02283 static void CalcRaildirsDrawstyle(TileHighlightData *thd, int x, int y, int method)
    02284 {
    02285   HighLightStyle b;
    02286
    02287   int dx = thd->selstart.x - (thd->selend.x & ~TILE_UNIT_MASK);
    02288   int dy = thd->selstart.y - (thd->selend.y & ~TILE_UNIT_MASK);
    02289   uint w = abs(dx) + TILE_SIZE;
    02290   uint h = abs(dy) + TILE_SIZE;
    02291
    02292   if (method & ~(VPM_RAILDIRS | VPM_SIGNALDIRS)) {
    02293     /* We 'force' a selection direction; first four rail buttons. */
    02294     method &= ~(VPM_RAILDIRS | VPM_SIGNALDIRS);
    02295     int raw_dx = thd->selstart.x - thd->selend.x;
    02296     int raw_dy = thd->selstart.y - thd->selend.y;
    02297     switch (method) {
    02298       case VPM_FIX_X:
    02299         b = HT_LINE | HT_DIR_Y;
    02300         x = thd->selstart.x;
    02301         break;
    02302
    02303       case VPM_FIX_Y:
    02304         b = HT_LINE | HT_DIR_X;
    02305         y = thd->selstart.y;
    02306         break;
    02307
    02308       case VPM_FIX_HORIZONTAL:
    02309         if (dx == -dy) {
    02310           /* We are on a straight horizontal line. Determine the 'rail'
    02311            * to build based the sub tile location. */
    02312           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
    02313         } else {
    02314           /* We are not on a straight line. Determine the rail to build
    02315            * based on whether we are above or below it. */
    02316           b = dx + dy >= TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
    02317
    02318           /* Calculate where a horizontal line through the start point and
    02319            * a vertical line from the selected end point intersect and
    02320            * use that point as the end point. */
    02321           int offset = (raw_dx - raw_dy) / 2;
    02322           x = thd->selstart.x - (offset & ~TILE_UNIT_MASK);
    02323           y = thd->selstart.y + (offset & ~TILE_UNIT_MASK);
    02324
    02325           /* 'Build' the last half rail tile if needed */
    02326           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
    02327             if (dx + dy >= TILE_SIZE) {
    02328               x += (dx + dy < 0) ? TILE_SIZE : -TILE_SIZE;
    02329             } else {
    02330               y += (dx + dy < 0) ? TILE_SIZE : -TILE_SIZE;
    02331             }
    02332           }
    02333
    02334           /* Make sure we do not overflow the map! */
    02335           CheckUnderflow(x, y, 1);
    02336           CheckUnderflow(y, x, 1);
    02337           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, 1);
    02338           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, 1);
    02339           assert(x >= 0 && y >= 0 && x <= (int)MapMaxX() * TILE_SIZE && y <= (int)MapMaxY() * TILE_SIZE);
    02340         }
    02341         break;
    02342
    02343       case VPM_FIX_VERTICAL:
    02344         if (dx == dy) {
    02345           /* We are on a straight vertical line. Determine the 'rail'
    02346            * to build based the sub tile location. */
    02347           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02348         } else {
    02349           /* We are not on a straight line. Determine the rail to build
    02350            * based on whether we are left or right from it. */
    02351           b = dx < dy ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02352
    02353           /* Calculate where a vertical line through the start point and
    02354            * a horizontal line from the selected end point intersect and
    02355            * use that point as the end point. */
    02356           int offset = (raw_dx + raw_dy + TILE_SIZE) / 2;
    02357           x = thd->selstart.x - (offset & ~TILE_UNIT_MASK);
    02358           y = thd->selstart.y - (offset & ~TILE_UNIT_MASK);
    02359
    02360           /* 'Build' the last half rail tile if needed */
    02361           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
    02362             if (dx - dy < 0) {
    02363               y += (dx > dy) ? TILE_SIZE : -TILE_SIZE;
    02364             } else {
    02365               x += (dx < dy) ? TILE_SIZE : -TILE_SIZE;
    02366             }
    02367           }
    02368
    02369           /* Make sure we do not overflow the map! */
    02370           CheckUnderflow(x, y, -1);
    02371           CheckUnderflow(y, x, -1);
    02372           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, -1);
    02373           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, -1);
    02374           assert(x >= 0 && y >= 0 && x <= (int)MapMaxX() * TILE_SIZE && y <= (int)MapMaxY() * TILE_SIZE);
    02375         }
    02376         break;
    02377
    02378       default:
    02379         NOT_REACHED();
    02380     }
    02381   } else if (TileVirtXY(thd->selstart.x, thd->selstart.y) == TileVirtXY(x, y)) { // check if we're only within one tile
    02382     if (method & VPM_RAILDIRS) {
    02383       b = GetAutorailHT(x, y);
    02384     } else { // rect for autosignals on one tile
    02385       b = HT_RECT;
    02386     }
    02387   } else if (h == TILE_SIZE) { // Is this in X direction?
    02388     if (dx == TILE_SIZE) { // 2x1 special handling
    02389       b = (Check2x1AutoRail(3)) | HT_LINE;
    02390     } else if (dx == -TILE_SIZE) {
    02391       b = (Check2x1AutoRail(2)) | HT_LINE;
    02392     } else {
    02393       b = HT_LINE | HT_DIR_X;
    02394     }
    02395     y = thd->selstart.y;
    02396   } else if (w == TILE_SIZE) { // Or Y direction?
    02397     if (dy == TILE_SIZE) { // 2x1 special handling
    02398       b = (Check2x1AutoRail(1)) | HT_LINE;
    02399     } else if (dy == -TILE_SIZE) { // 2x1 other direction
    02400       b = (Check2x1AutoRail(0)) | HT_LINE;
    02401     } else {
    02402       b = HT_LINE | HT_DIR_Y;
    02403     }
    02404     x = thd->selstart.x;
    02405   } else if (w > h * 2) { // still count as x dir?
    02406     b = HT_LINE | HT_DIR_X;
    02407     y = thd->selstart.y;
    02408   } else if (h > w * 2) { // still count as y dir?
    02409     b = HT_LINE | HT_DIR_Y;
    02410     x = thd->selstart.x;
    02411   } else { // complicated direction
    02412     int d = w - h;
    02413     thd->selend.x = thd->selend.x & ~TILE_UNIT_MASK;
    02414     thd->selend.y = thd->selend.y & ~TILE_UNIT_MASK;
    02415
    02416     /* four cases. */
    02417     if (x > thd->selstart.x) {
    02418       if (y > thd->selstart.y) {
    02419         /* south */
    02420         if (d == 0) {
    02421           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02422         } else if (d >= 0) {
    02423           x = thd->selstart.x + h;
    02424           b = HT_LINE | HT_DIR_VL;
    02425         } else {
    02426           y = thd->selstart.y + w;
    02427           b = HT_LINE | HT_DIR_VR;
    02428         }
    02429       } else {
    02430         /* west */
    02431         if (d == 0) {
    02432           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
    02433         } else if (d >= 0) {
    02434           x = thd->selstart.x + h;
    02435           b = HT_LINE | HT_DIR_HL;
    02436         } else {
    02437           y = thd->selstart.y - w;
    02438           b = HT_LINE | HT_DIR_HU;
    02439         }
    02440       }
    02441     } else {
    02442       if (y > thd->selstart.y) {
    02443         /* east */
    02444         if (d == 0) {
    02445           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
    02446         } else if (d >= 0) {
    02447           x = thd->selstart.x - h;
    02448           b = HT_LINE | HT_DIR_HU;
    02449         } else {
    02450           y = thd->selstart.y + w;
    02451           b = HT_LINE | HT_DIR_HL;
    02452         }
    02453       } else {
    02454         /* north */
    02455         if (d == 0) {
    02456           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02457         } else if (d >= 0) {
    02458           x = thd->selstart.x - h;
    02459           b = HT_LINE | HT_DIR_VR;
    02460         } else {
    02461           y = thd->selstart.y - w;
    02462           b = HT_LINE | HT_DIR_VL;
    02463         }
    02464       }
    02465     }
    02466   }
    02467
    02468   if (_settings_client.gui.measure_tooltip) {
    02469     TileIndex t0 = TileVirtXY(thd->selstart.x, thd->selstart.y);
    02470     TileIndex t1 = TileVirtXY(x, y);
    02471     uint distance = DistanceManhattan(t0, t1) + 1;
    02472     byte index = 0;
    02473     uint64 params[2];
    02474
    02475     if (distance != 1) {
    02476       int heightdiff = CalcHeightdiff(b, distance, t0, t1);
    02477       /* If we are showing a tooltip for horizontal or vertical drags,
    02478        * 2 tiles have a length of 1. To bias towards the ceiling we add
    02479        * one before division. It feels more natural to count 3 lengths as 2 */
    02480       if ((b & HT_DIR_MASK) != HT_DIR_X && (b & HT_DIR_MASK) != HT_DIR_Y) {
    02481         distance = (distance + 1) / 2;
    02482       }
    02483
    02484       params[index++] = distance;
    02485       if (heightdiff != 0) params[index++] = heightdiff;
    02486     }
    02487
    02488     ShowMeasurementTooltips(measure_strings_length[index], index, params);
    02489   }
    02490
    02491   thd->selend.x = x;
    02492   thd->selend.y = y;
    02493   thd->next_drawstyle = b;
    02494 }
    02495
    02502 void VpSelectTilesWithMethod(int x, int y, ViewportPlaceMethod method)
    02503 {
    02504   int sx, sy;
    02505   HighLightStyle style;
    02506
    02507   if (x == -1) {
    02508     _thd.selend.x = -1;
    02509     return;
    02510   }
    02511
    02512   /* Special handling of drag in any (8-way) direction */
    02513   if (method & (VPM_RAILDIRS | VPM_SIGNALDIRS)) {
    02514     _thd.selend.x = x;
    02515     _thd.selend.y = y;
    02516     CalcRaildirsDrawstyle(&_thd, x, y, method);
    02517     return;
    02518   }
    02519
    02520   /* Needed so level-land is placed correctly */
    02521   if (_thd.next_drawstyle == HT_POINT) {
    02522     x += TILE_SIZE / 2;
    02523     y += TILE_SIZE / 2;
    02524   }
    02525
    02526   sx = _thd.selstart.x;
    02527   sy = _thd.selstart.y;
    02528
    02529   int limit = 0;
    02530
    02531   switch (method) {
    02532     case VPM_X_OR_Y: // drag in X or Y direction
    02533       if (abs(sy - y) < abs(sx - x)) {
    02534         y = sy;
    02535         style = HT_DIR_X;
    02536       } else {
    02537         x = sx;
    02538         style = HT_DIR_Y;
    02539       }
    02540       goto calc_heightdiff_single_direction;
    02541
    02542     case VPM_X_LIMITED: // Drag in X direction (limited size).
    02543       limit = (_thd.sizelimit - 1) * TILE_SIZE;
    02544       /* Fallthrough. */
    02545
    02546     case VPM_FIX_X: // drag in Y direction
    02547       x = sx;
    02548       style = HT_DIR_Y;
    02549       goto calc_heightdiff_single_direction;
    02550
    02551     case VPM_Y_LIMITED: // Drag in Y direction (limited size).
    02552       limit = (_thd.sizelimit - 1) * TILE_SIZE;
    02553       /* Fallthrough. */
    02554
    02555     case VPM_FIX_Y: // drag in X direction
    02556       y = sy;
    02557       style = HT_DIR_X;
    02558
    02559 calc_heightdiff_single_direction:;
    02560       if (limit > 0) {
    02561         x = sx + Clamp(x - sx, -limit, limit);
    02562         y = sy + Clamp(y - sy, -limit, limit);
    02563       }
    02564       if (_settings_client.gui.measure_tooltip) {
    02565         TileIndex t0 = TileVirtXY(sx, sy);
    02566         TileIndex t1 = TileVirtXY(x, y);
    02567         uint distance = DistanceManhattan(t0, t1) + 1;
    02568         byte index = 0;
    02569         uint64 params[2];
    02570
    02571         if (distance != 1) {
    02572           /* With current code passing a HT_LINE style to calculate the height
    02573            * difference is enough. However if/when a point-tool is created
    02574            * with this method, function should be called with new_style (below)
    02575            * instead of HT_LINE | style case HT_POINT is handled specially
    02576            * new_style := (_thd.next_drawstyle & HT_RECT) ? HT_LINE | style : _thd.next_drawstyle; */
    02577           int heightdiff = CalcHeightdiff(HT_LINE | style, 0, t0, t1);
    02578
    02579           params[index++] = distance;
    02580           if (heightdiff != 0) params[index++] = heightdiff;
    02581         }
    02582
    02583         ShowMeasurementTooltips(measure_strings_length[index], index, params);
    02584       } break;
    02585
    02586     case VPM_X_AND_Y_LIMITED: // Drag an X by Y constrained rect area.
    02587       limit = (_thd.sizelimit - 1) * TILE_SIZE;
    02588       x = sx + Clamp(x - sx, -limit, limit);
    02589       y = sy + Clamp(y - sy, -limit, limit);
    02590       /* Fallthrough. */
    02591
    02592     case VPM_X_AND_Y: { // drag an X by Y area
    02593       if (_settings_client.gui.measure_tooltip) {
    02594         static const StringID measure_strings_area[] = {
    02595           STR_NULL, STR_NULL, STR_MEASURE_AREA, STR_MEASURE_AREA_HEIGHTDIFF
    02596         };
    02597
    02598         TileIndex t0 = TileVirtXY(sx, sy);
    02599         TileIndex t1 = TileVirtXY(x, y);
    02600         uint dx = Delta(TileX(t0), TileX(t1)) + 1;
    02601         uint dy = Delta(TileY(t0), TileY(t1)) + 1;
    02602         byte index = 0;
    02603         uint64 params[3];
    02604
    02605         /* If dragging an area (eg dynamite tool) and it is actually a single
    02606          * row/column, change the type to 'line' to get proper calculation for height */
    02607         style = (HighLightStyle)_thd.next_drawstyle;
    02608         if (style & HT_RECT) {
    02609           if (dx == 1) {
    02610             style = HT_LINE | HT_DIR_Y;
    02611           } else if (dy == 1) {
    02612             style = HT_LINE | HT_DIR_X;
    02613           }
    02614         }
    02615
    02616         if (dx != 1 || dy != 1) {
    02617           int heightdiff = CalcHeightdiff(style, 0, t0, t1);
    02618
    02619           params[index++] = dx;
    02620           params[index++] = dy;
    02621           if (heightdiff != 0) params[index++] = heightdiff;
    02622         }
    02623
    02624         ShowMeasurementTooltips(measure_strings_area[index], index, params);
    02625       }
    02626     break;
    02627
    02628     }
    02629     default: NOT_REACHED();
    02630   }
    02631
    02632   _thd.selend.x = x;
    02633   _thd.selend.y = y;
    02634 }
    02635
    02640 bool VpHandlePlaceSizingDrag()
    02641 {
    02642   if (_special_mouse_mode != WSM_SIZING) return true;
    02643
    02644   /* stop drag mode if the window has been closed */
    02645   Window *w = FindWindowById(_thd.window_class, _thd.window_number);
    02646   if (w == NULL) {
    02647     ResetObjectToPlace();
    02648     return false;
    02649   }
    02650
    02651   /* while dragging execute the drag procedure of the corresponding window (mostly VpSelectTilesWithMethod() ) */
    02652   if (_left_button_down) {
    02653     w->OnPlaceDrag(_thd.select_method, _thd.select_proc, GetTileBelowCursor());
    02654     return false;
    02655   }
    02656
    02657   /* mouse button released..
    02658    * keep the selected tool, but reset it to the original mode. */
    02659   _special_mouse_mode = WSM_NONE;
    02660   if (_thd.next_drawstyle == HT_RECT) {
    02661     _thd.place_mode = HT_RECT;
    02662   } else if (_thd.select_method & VPM_SIGNALDIRS) {
    02663     _thd.place_mode = HT_RECT;
    02664   } else if (_thd.select_method & VPM_RAILDIRS) {
    02665     _thd.place_mode = (_thd.select_method & ~VPM_RAILDIRS) ? _thd.next_drawstyle : HT_RAIL;
    02666   } else {
    02667     _thd.place_mode = HT_POINT;
    02668   }
    02669   SetTileSelectSize(1, 1);
    02670
    02671   w->OnPlaceMouseUp(_thd.select_method, _thd.select_proc, _thd.selend, TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y));
    02672
    02673   return false;
    02674 }
    02675
    02676 void SetObjectToPlaceWnd(CursorID icon, PaletteID pal, HighLightStyle mode, Window *w)
    02677 {
    02678   SetObjectToPlace(icon, pal, mode, w->window_class, w->window_number);
    02679 }
    02680
    02681 #include "table/animcursors.h"
    02682
    02683 void SetObjectToPlace(CursorID icon, PaletteID pal, HighLightStyle mode, WindowClass window_class, WindowNumber window_num)
    02684 {
    02685   /* undo clicking on button and drag & drop */
    02686   if (_thd.place_mode != HT_NONE || _special_mouse_mode == WSM_DRAGDROP) {
    02687     Window *w = FindWindowById(_thd.window_class, _thd.window_number);
    02688     if (w != NULL) {
    02689       /* Call the abort function, but set the window class to something
    02690        * that will never be used to avoid infinite loops. Setting it to
    02691        * the 'next' window class must not be done because recursion into
    02692        * this function might in some cases reset the newly set object to
    02693        * place or not properly reset the original selection. */
    02694       _thd.window_class = WC_INVALID;
    02695       w->OnPlaceObjectAbort();
    02696     }
    02697   }
    02698
    02699   SetTileSelectSize(1, 1);
    02700
    02701   _thd.make_square_red = false;
    02702
    02703   if (mode == HT_DRAG) { // HT_DRAG is for dragdropping trains in the depot window
    02704     mode = HT_NONE;
    02705     _special_mouse_mode = WSM_DRAGDROP;
    02706   } else {
    02707     _special_mouse_mode = WSM_NONE;
    02708   }
    02709
    02710   _thd.place_mode = mode;
    02711   _thd.window_class = window_class;
    02712   _thd.window_number = window_num;
    02713
    02714   if (mode == HT_SPECIAL) // special tools, like tunnels or docks start with presizing mode
    02715     VpStartPreSizing();
    02716
    02717   if ((icon & ANIMCURSOR_FLAG) != 0) {
    02718     SetAnimatedMouseCursor(_animcursors[icon & ~ANIMCURSOR_FLAG]);
    02719   } else {
    02720     SetMouseCursor(icon, pal);
    02721   }
    02722
    02723 }
    02724
    02725 void ResetObjectToPlace()
    02726 {
    02727   SetObjectToPlace(SPR_CURSOR_MOUSE, PAL_NONE, HT_NONE, WC_MAIN_WINDOW, 0);
    02728 }