viewport.cpp

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00001 /* $Id: viewport.cpp 21612 2010-12-23 20:25:55Z smatz $ */
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 
00029 #include "stdafx.h"
00030 #include "landscape.h"
00031 #include "viewport_func.h"
00032 #include "station_base.h"
00033 #include "waypoint_base.h"
00034 #include "town.h"
00035 #include "signs_base.h"
00036 #include "signs_func.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 #include "terraform_gui.h"
00049 
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 
00116 enum SpriteCombineMode {
00117   SPRITE_COMBINE_NONE,     
00118   SPRITE_COMBINE_PENDING,  
00119   SPRITE_COMBINE_ACTIVE,   
00120 };
00121 
00122 typedef SmallVector<TileSpriteToDraw, 64> TileSpriteToDrawVector;
00123 typedef SmallVector<StringSpriteToDraw, 4> StringSpriteToDrawVector;
00124 typedef SmallVector<ParentSpriteToDraw, 64> ParentSpriteToDrawVector;
00125 typedef SmallVector<ParentSpriteToDraw*, 64> ParentSpriteToSortVector;
00126 typedef SmallVector<ChildScreenSpriteToDraw, 16> ChildScreenSpriteToDrawVector;
00127 
00129 struct ViewportDrawer {
00130   DrawPixelInfo dpi;
00131 
00132   StringSpriteToDrawVector string_sprites_to_draw;
00133   TileSpriteToDrawVector tile_sprites_to_draw;
00134   ParentSpriteToDrawVector parent_sprites_to_draw;
00135   ParentSpriteToSortVector parent_sprites_to_sort; 
00136   ChildScreenSpriteToDrawVector child_screen_sprites_to_draw;
00137 
00138   int *last_child;
00139 
00140   SpriteCombineMode combine_sprites;               
00141 
00142   int foundation[FOUNDATION_PART_END];             
00143   FoundationPart foundation_part;                  
00144   int *last_foundation_child[FOUNDATION_PART_END]; 
00145   Point foundation_offset[FOUNDATION_PART_END];    
00146 };
00147 
00148 static ViewportDrawer _vd;
00149 
00150 TileHighlightData _thd;
00151 static TileInfo *_cur_ti;
00152 bool _draw_bounding_boxes = false;
00153 
00154 static Point MapXYZToViewport(const ViewPort *vp, int x, int y, int z)
00155 {
00156   Point p = RemapCoords(x, y, z);
00157   p.x -= vp->virtual_width / 2;
00158   p.y -= vp->virtual_height / 2;
00159   return p;
00160 }
00161 
00162 void DeleteWindowViewport(Window *w)
00163 {
00164   free(w->viewport);
00165   w->viewport = NULL;
00166 }
00167 
00180 void InitializeWindowViewport(Window *w, int x, int y,
00181   int width, int height, uint32 follow_flags, ZoomLevel zoom)
00182 {
00183   assert(w->viewport == NULL);
00184 
00185   ViewportData *vp = CallocT<ViewportData>(1);
00186 
00187   vp->left = x + w->left;
00188   vp->top = y + w->top;
00189   vp->width = width;
00190   vp->height = height;
00191 
00192   vp->zoom = zoom;
00193 
00194   vp->virtual_width = ScaleByZoom(width, zoom);
00195   vp->virtual_height = ScaleByZoom(height, zoom);
00196 
00197   Point pt;
00198 
00199   if (follow_flags & 0x80000000) {
00200     const Vehicle *veh;
00201 
00202     vp->follow_vehicle = (VehicleID)(follow_flags & 0xFFFF);
00203     veh = Vehicle::Get(vp->follow_vehicle);
00204     pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
00205   } else {
00206     uint x = TileX(follow_flags) * TILE_SIZE;
00207     uint y = TileY(follow_flags) * TILE_SIZE;
00208 
00209     vp->follow_vehicle = INVALID_VEHICLE;
00210     pt = MapXYZToViewport(vp, x, y, GetSlopeZ(x, y));
00211   }
00212 
00213   vp->scrollpos_x = pt.x;
00214   vp->scrollpos_y = pt.y;
00215   vp->dest_scrollpos_x = pt.x;
00216   vp->dest_scrollpos_y = pt.y;
00217 
00218   w->viewport = vp;
00219   vp->virtual_left = 0;//pt.x;
00220   vp->virtual_top = 0;//pt.y;
00221 }
00222 
00223 static Point _vp_move_offs;
00224 
00225 static void DoSetViewportPosition(const Window *w, int left, int top, int width, int height)
00226 {
00227   FOR_ALL_WINDOWS_FROM_BACK_FROM(w, w) {
00228     if (left + width > w->left &&
00229         w->left + w->width > left &&
00230         top + height > w->top &&
00231         w->top + w->height > top) {
00232 
00233       if (left < w->left) {
00234         DoSetViewportPosition(w, left, top, w->left - left, height);
00235         DoSetViewportPosition(w, left + (w->left - left), top, width - (w->left - left), height);
00236         return;
00237       }
00238 
00239       if (left + width > w->left + w->width) {
00240         DoSetViewportPosition(w, left, top, (w->left + w->width - left), height);
00241         DoSetViewportPosition(w, left + (w->left + w->width - left), top, width - (w->left + w->width - left), height);
00242         return;
00243       }
00244 
00245       if (top < w->top) {
00246         DoSetViewportPosition(w, left, top, width, (w->top - top));
00247         DoSetViewportPosition(w, left, top + (w->top - top), width, height - (w->top - top));
00248         return;
00249       }
00250 
00251       if (top + height > w->top + w->height) {
00252         DoSetViewportPosition(w, left, top, width, (w->top + w->height - top));
00253         DoSetViewportPosition(w, left, top + (w->top + w->height - top), width, height - (w->top + w->height - top));
00254         return;
00255       }
00256 
00257       return;
00258     }
00259   }
00260 
00261   {
00262     int xo = _vp_move_offs.x;
00263     int yo = _vp_move_offs.y;
00264 
00265     if (abs(xo) >= width || abs(yo) >= height) {
00266       /* fully_outside */
00267       RedrawScreenRect(left, top, left + width, top + height);
00268       return;
00269     }
00270 
00271     GfxScroll(left, top, width, height, xo, yo);
00272 
00273     if (xo > 0) {
00274       RedrawScreenRect(left, top, xo + left, top + height);
00275       left += xo;
00276       width -= xo;
00277     } else if (xo < 0) {
00278       RedrawScreenRect(left + width + xo, top, left + width, top + height);
00279       width += xo;
00280     }
00281 
00282     if (yo > 0) {
00283       RedrawScreenRect(left, top, width + left, top + yo);
00284     } else if (yo < 0) {
00285       RedrawScreenRect(left, top + height + yo, width + left, top + height);
00286     }
00287   }
00288 }
00289 
00290 static void SetViewportPosition(Window *w, int x, int y)
00291 {
00292   ViewPort *vp = w->viewport;
00293   int old_left = vp->virtual_left;
00294   int old_top = vp->virtual_top;
00295   int i;
00296   int left, top, width, height;
00297 
00298   vp->virtual_left = x;
00299   vp->virtual_top = y;
00300 
00301   /* Viewport is bound to its left top corner, so it must be rounded down (UnScaleByZoomLower)
00302    * else glitch described in FS#1412 will happen (offset by 1 pixel with zoom level > NORMAL)
00303    */
00304   old_left = UnScaleByZoomLower(old_left, vp->zoom);
00305   old_top = UnScaleByZoomLower(old_top, vp->zoom);
00306   x = UnScaleByZoomLower(x, vp->zoom);
00307   y = UnScaleByZoomLower(y, vp->zoom);
00308 
00309   old_left -= x;
00310   old_top -= y;
00311 
00312   if (old_top == 0 && old_left == 0) return;
00313 
00314   _vp_move_offs.x = old_left;
00315   _vp_move_offs.y = old_top;
00316 
00317   left = vp->left;
00318   top = vp->top;
00319   width = vp->width;
00320   height = vp->height;
00321 
00322   if (left < 0) {
00323     width += left;
00324     left = 0;
00325   }
00326 
00327   i = left + width - _screen.width;
00328   if (i >= 0) width -= i;
00329 
00330   if (width > 0) {
00331     if (top < 0) {
00332       height += top;
00333       top = 0;
00334     }
00335 
00336     i = top + height - _screen.height;
00337     if (i >= 0) height -= i;
00338 
00339     if (height > 0) DoSetViewportPosition(w->z_front, left, top, width, height);
00340   }
00341 }
00342 
00351 ViewPort *IsPtInWindowViewport(const Window *w, int x, int y)
00352 {
00353   ViewPort *vp = w->viewport;
00354 
00355   if (vp != NULL &&
00356       IsInsideMM(x, vp->left, vp->left + vp->width) &&
00357       IsInsideMM(y, vp->top, vp->top + vp->height))
00358     return vp;
00359 
00360   return NULL;
00361 }
00362 
00370 static Point TranslateXYToTileCoord(const ViewPort *vp, int x, int y)
00371 {
00372   Point pt;
00373   int a, b;
00374   uint z;
00375 
00376   if ( (uint)(x -= vp->left) >= (uint)vp->width ||
00377         (uint)(y -= vp->top) >= (uint)vp->height) {
00378         Point pt = {-1, -1};
00379         return pt;
00380   }
00381 
00382   x = (ScaleByZoom(x, vp->zoom) + vp->virtual_left) >> 2;
00383   y = (ScaleByZoom(y, vp->zoom) + vp->virtual_top) >> 1;
00384 
00385   a = y - x;
00386   b = y + x;
00387 
00388   /* we need to move variables in to the valid range, as the
00389    * GetTileZoomCenterWindow() function can call here with invalid x and/or y,
00390    * when the user tries to zoom out along the sides of the map */
00391   a = Clamp(a, -4 * (int)TILE_SIZE, (int)(MapMaxX() * TILE_SIZE) - 1);
00392   b = Clamp(b, -4 * (int)TILE_SIZE, (int)(MapMaxY() * TILE_SIZE) - 1);
00393 
00394   /* (a, b) is the X/Y-world coordinate that belongs to (x,y) if the landscape would be completely flat on height 0.
00395    * Now find the Z-world coordinate by fix point iteration.
00396    * This is a bit tricky because the tile height is non-continuous at foundations.
00397    * The clicked point should be approached from the back, otherwise there are regions that are not clickable.
00398    * (FOUNDATION_HALFTILE_LOWER on SLOPE_STEEP_S hides north halftile completely)
00399    * So give it a z-malus of 4 in the first iterations.
00400    */
00401   z = 0;
00402 
00403   int min_coord = _settings_game.construction.freeform_edges ? TILE_SIZE : 0;
00404 
00405   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;
00406   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;
00407   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;
00408 
00409   pt.x = Clamp(a + (int)z, min_coord, MapMaxX() * TILE_SIZE - 1);
00410   pt.y = Clamp(b + (int)z, min_coord, MapMaxY() * TILE_SIZE - 1);
00411 
00412   return pt;
00413 }
00414 
00415 /* When used for zooming, check area below current coordinates (x,y)
00416  * and return the tile of the zoomed out/in position (zoom_x, zoom_y)
00417  * when you just want the tile, make x = zoom_x and y = zoom_y */
00418 static Point GetTileFromScreenXY(int x, int y, int zoom_x, int zoom_y)
00419 {
00420   Window *w;
00421   ViewPort *vp;
00422   Point pt;
00423 
00424   if ( (w = FindWindowFromPt(x, y)) != NULL &&
00425        (vp = IsPtInWindowViewport(w, x, y)) != NULL)
00426         return TranslateXYToTileCoord(vp, zoom_x, zoom_y);
00427 
00428   pt.y = pt.x = -1;
00429   return pt;
00430 }
00431 
00432 Point GetTileBelowCursor()
00433 {
00434   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, _cursor.pos.x, _cursor.pos.y);
00435 }
00436 
00437 
00438 Point GetTileZoomCenterWindow(bool in, Window * w)
00439 {
00440   int x, y;
00441   ViewPort *vp = w->viewport;
00442 
00443   if (in) {
00444     x = ((_cursor.pos.x - vp->left) >> 1) + (vp->width >> 2);
00445     y = ((_cursor.pos.y - vp->top) >> 1) + (vp->height >> 2);
00446   } else {
00447     x = vp->width - (_cursor.pos.x - vp->left);
00448     y = vp->height - (_cursor.pos.y - vp->top);
00449   }
00450   /* Get the tile below the cursor and center on the zoomed-out center */
00451   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, x + vp->left, y + vp->top);
00452 }
00453 
00462 void HandleZoomMessage(Window *w, const ViewPort *vp, byte widget_zoom_in, byte widget_zoom_out)
00463 {
00464   w->SetWidgetDisabledState(widget_zoom_in, vp->zoom == ZOOM_LVL_MIN);
00465   w->SetWidgetDirty(widget_zoom_in);
00466 
00467   w->SetWidgetDisabledState(widget_zoom_out, vp->zoom == ZOOM_LVL_MAX);
00468   w->SetWidgetDirty(widget_zoom_out);
00469 }
00470 
00483 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)
00484 {
00485   assert((image & SPRITE_MASK) < MAX_SPRITES);
00486 
00487   TileSpriteToDraw *ts = _vd.tile_sprites_to_draw.Append();
00488   ts->image = image;
00489   ts->pal = pal;
00490   ts->sub = sub;
00491   Point pt = RemapCoords(x, y, z);
00492   ts->x = pt.x + extra_offs_x;
00493   ts->y = pt.y + extra_offs_y;
00494 }
00495 
00508 static void AddChildSpriteToFoundation(SpriteID image, PaletteID pal, const SubSprite *sub, FoundationPart foundation_part, int extra_offs_x, int extra_offs_y)
00509 {
00510   assert(IsInsideMM(foundation_part, 0, FOUNDATION_PART_END));
00511   assert(_vd.foundation[foundation_part] != -1);
00512   Point offs = _vd.foundation_offset[foundation_part];
00513 
00514   /* Change the active ChildSprite list to the one of the foundation */
00515   int *old_child = _vd.last_child;
00516   _vd.last_child = _vd.last_foundation_child[foundation_part];
00517 
00518   AddChildSpriteScreen(image, pal, offs.x + extra_offs_x, offs.y + extra_offs_y, false, sub);
00519 
00520   /* Switch back to last ChildSprite list */
00521   _vd.last_child = old_child;
00522 }
00523 
00537 void DrawGroundSpriteAt(SpriteID image, PaletteID pal, int32 x, int32 y, int z, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
00538 {
00539   /* Switch to first foundation part, if no foundation was drawn */
00540   if (_vd.foundation_part == FOUNDATION_PART_NONE) _vd.foundation_part = FOUNDATION_PART_NORMAL;
00541 
00542   if (_vd.foundation[_vd.foundation_part] != -1) {
00543     Point pt = RemapCoords(x, y, z);
00544     AddChildSpriteToFoundation(image, pal, sub, _vd.foundation_part, pt.x + extra_offs_x, pt.y + extra_offs_y);
00545   } else {
00546     AddTileSpriteToDraw(image, pal, _cur_ti->x + x, _cur_ti->y + y, _cur_ti->z + z, sub, extra_offs_x, extra_offs_y);
00547   }
00548 }
00549 
00560 void DrawGroundSprite(SpriteID image, PaletteID pal, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
00561 {
00562   DrawGroundSpriteAt(image, pal, 0, 0, 0, sub, extra_offs_x, extra_offs_y);
00563 }
00564 
00572 void OffsetGroundSprite(int x, int y)
00573 {
00574   /* Switch to next foundation part */
00575   switch (_vd.foundation_part) {
00576     case FOUNDATION_PART_NONE:
00577       _vd.foundation_part = FOUNDATION_PART_NORMAL;
00578       break;
00579     case FOUNDATION_PART_NORMAL:
00580       _vd.foundation_part = FOUNDATION_PART_HALFTILE;
00581       break;
00582     default: NOT_REACHED();
00583   }
00584 
00585   /* _vd.last_child == NULL if foundation sprite was clipped by the viewport bounds */
00586   if (_vd.last_child != NULL) _vd.foundation[_vd.foundation_part] = _vd.parent_sprites_to_draw.Length() - 1;
00587 
00588   _vd.foundation_offset[_vd.foundation_part].x = x;
00589   _vd.foundation_offset[_vd.foundation_part].y = y;
00590   _vd.last_foundation_child[_vd.foundation_part] = _vd.last_child;
00591 }
00592 
00604 static void AddCombinedSprite(SpriteID image, PaletteID pal, int x, int y, byte z, const SubSprite *sub)
00605 {
00606   Point pt = RemapCoords(x, y, z);
00607   const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
00608 
00609   if (pt.x + spr->x_offs >= _vd.dpi.left + _vd.dpi.width ||
00610       pt.x + spr->x_offs + spr->width <= _vd.dpi.left ||
00611       pt.y + spr->y_offs >= _vd.dpi.top + _vd.dpi.height ||
00612       pt.y + spr->y_offs + spr->height <= _vd.dpi.top)
00613     return;
00614 
00615   const ParentSpriteToDraw *pstd = _vd.parent_sprites_to_draw.End() - 1;
00616   AddChildSpriteScreen(image, pal, pt.x - pstd->left, pt.y - pstd->top, false, sub);
00617 }
00618 
00644 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)
00645 {
00646   int32 left, right, top, bottom;
00647 
00648   assert((image & SPRITE_MASK) < MAX_SPRITES);
00649 
00650   /* make the sprites transparent with the right palette */
00651   if (transparent) {
00652     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
00653     pal = PALETTE_TO_TRANSPARENT;
00654   }
00655 
00656   if (_vd.combine_sprites == SPRITE_COMBINE_ACTIVE) {
00657     AddCombinedSprite(image, pal, x, y, z, sub);
00658     return;
00659   }
00660 
00661   _vd.last_child = NULL;
00662 
00663   Point pt = RemapCoords(x, y, z);
00664   int tmp_left, tmp_top, tmp_x = pt.x, tmp_y = pt.y;
00665 
00666   /* Compute screen extents of sprite */
00667   if (image == SPR_EMPTY_BOUNDING_BOX) {
00668     left = tmp_left = RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x;
00669     right           = RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1;
00670     top  = tmp_top  = RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y;
00671     bottom          = RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1;
00672   } else {
00673     const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
00674     left = tmp_left = (pt.x += spr->x_offs);
00675     right           = (pt.x +  spr->width );
00676     top  = tmp_top  = (pt.y += spr->y_offs);
00677     bottom          = (pt.y +  spr->height);
00678   }
00679 
00680   if (_draw_bounding_boxes && (image != SPR_EMPTY_BOUNDING_BOX)) {
00681     /* Compute maximal extents of sprite and its bounding box */
00682     left   = min(left  , RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x);
00683     right  = max(right , RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1);
00684     top    = min(top   , RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y);
00685     bottom = max(bottom, RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1);
00686   }
00687 
00688   /* Do not add the sprite to the viewport, if it is outside */
00689   if (left   >= _vd.dpi.left + _vd.dpi.width ||
00690       right  <= _vd.dpi.left                 ||
00691       top    >= _vd.dpi.top + _vd.dpi.height ||
00692       bottom <= _vd.dpi.top) {
00693     return;
00694   }
00695 
00696   ParentSpriteToDraw *ps = _vd.parent_sprites_to_draw.Append();
00697   ps->x = tmp_x;
00698   ps->y = tmp_y;
00699 
00700   ps->left = tmp_left;
00701   ps->top  = tmp_top;
00702 
00703   ps->image = image;
00704   ps->pal = pal;
00705   ps->sub = sub;
00706   ps->xmin = x + bb_offset_x;
00707   ps->xmax = x + max(bb_offset_x, w) - 1;
00708 
00709   ps->ymin = y + bb_offset_y;
00710   ps->ymax = y + max(bb_offset_y, h) - 1;
00711 
00712   ps->zmin = z + bb_offset_z;
00713   ps->zmax = z + max(bb_offset_z, dz) - 1;
00714 
00715   ps->comparison_done = false;
00716   ps->first_child = -1;
00717 
00718   _vd.last_child = &ps->first_child;
00719 
00720   if (_vd.combine_sprites == SPRITE_COMBINE_PENDING) _vd.combine_sprites = SPRITE_COMBINE_ACTIVE;
00721 }
00722 
00741 void StartSpriteCombine()
00742 {
00743   assert(_vd.combine_sprites == SPRITE_COMBINE_NONE);
00744   _vd.combine_sprites = SPRITE_COMBINE_PENDING;
00745 }
00746 
00751 void EndSpriteCombine()
00752 {
00753   assert(_vd.combine_sprites != SPRITE_COMBINE_NONE);
00754   _vd.combine_sprites = SPRITE_COMBINE_NONE;
00755 }
00756 
00766 static bool IsInRangeInclusive(int begin, int end, int check)
00767 {
00768   if (begin > end) Swap(begin, end);
00769   return begin <= check && check <= end;
00770 }
00771 
00778 bool IsInsideRotatedRectangle(int x, int y)
00779 {
00780   int dist_a = (_thd.size.x + _thd.size.y);      // Rotated coordinate system for selected rectangle.
00781   int dist_b = (_thd.size.x - _thd.size.y);      // We don't have to divide by 2. It's all relative!
00782   int a = ((x - _thd.pos.x) + (y - _thd.pos.y)); // Rotated coordinate system for the point under scrutiny.
00783   int b = ((x - _thd.pos.x) - (y - _thd.pos.y));
00784 
00785   /* Check if a and b are between 0 and dist_a or dist_b respectively. */
00786   return IsInRangeInclusive(dist_a, 0, a) && IsInRangeInclusive(dist_b, 0, b);
00787 }
00788 
00799 void AddChildSpriteScreen(SpriteID image, PaletteID pal, int x, int y, bool transparent, const SubSprite *sub)
00800 {
00801   assert((image & SPRITE_MASK) < MAX_SPRITES);
00802 
00803   /* If the ParentSprite was clipped by the viewport bounds, do not draw the ChildSprites either */
00804   if (_vd.last_child == NULL) return;
00805 
00806   /* make the sprites transparent with the right palette */
00807   if (transparent) {
00808     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
00809     pal = PALETTE_TO_TRANSPARENT;
00810   }
00811 
00812   *_vd.last_child = _vd.child_screen_sprites_to_draw.Length();
00813 
00814   ChildScreenSpriteToDraw *cs = _vd.child_screen_sprites_to_draw.Append();
00815   cs->image = image;
00816   cs->pal = pal;
00817   cs->sub = sub;
00818   cs->x = x;
00819   cs->y = y;
00820   cs->next = -1;
00821 
00822   /* Append the sprite to the active ChildSprite list.
00823    * If the active ParentSprite is a foundation, update last_foundation_child as well.
00824    * Note: ChildSprites of foundations are NOT sequential in the vector, as selection sprites are added at last. */
00825   if (_vd.last_foundation_child[0] == _vd.last_child) _vd.last_foundation_child[0] = &cs->next;
00826   if (_vd.last_foundation_child[1] == _vd.last_child) _vd.last_foundation_child[1] = &cs->next;
00827   _vd.last_child = &cs->next;
00828 }
00829 
00830 static void AddStringToDraw(int x, int y, StringID string, uint64 params_1, uint64 params_2, Colours colour, uint16 width)
00831 {
00832   assert(width != 0);
00833   StringSpriteToDraw *ss = _vd.string_sprites_to_draw.Append();
00834   ss->string = string;
00835   ss->x = x;
00836   ss->y = y;
00837   ss->params[0] = params_1;
00838   ss->params[1] = params_2;
00839   ss->width = width;
00840   ss->colour = colour;
00841 }
00842 
00843 
00855 static void DrawSelectionSprite(SpriteID image, PaletteID pal, const TileInfo *ti, int z_offset, FoundationPart foundation_part)
00856 {
00857   /* FIXME: This is not totally valid for some autorail highlights that extend over the edges of the tile. */
00858   if (_vd.foundation[foundation_part] == -1) {
00859     /* draw on real ground */
00860     AddTileSpriteToDraw(image, pal, ti->x, ti->y, ti->z + z_offset);
00861   } else {
00862     /* draw on top of foundation */
00863     AddChildSpriteToFoundation(image, pal, NULL, foundation_part, 0, -z_offset);
00864   }
00865 }
00866 
00873 static void DrawTileSelectionRect(const TileInfo *ti, PaletteID pal)
00874 {
00875   if (!IsValidTile(ti->tile)) return;
00876 
00877   SpriteID sel;
00878   if (IsHalftileSlope(ti->tileh)) {
00879     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
00880     SpriteID sel2 = SPR_HALFTILE_SELECTION_FLAT + halftile_corner;
00881     DrawSelectionSprite(sel2, pal, ti, 7 + TILE_HEIGHT, FOUNDATION_PART_HALFTILE);
00882 
00883     Corner opposite_corner = OppositeCorner(halftile_corner);
00884     if (IsSteepSlope(ti->tileh)) {
00885       sel = SPR_HALFTILE_SELECTION_DOWN;
00886     } else {
00887       sel = ((ti->tileh & SlopeWithOneCornerRaised(opposite_corner)) != 0 ? SPR_HALFTILE_SELECTION_UP : SPR_HALFTILE_SELECTION_FLAT);
00888     }
00889     sel += opposite_corner;
00890   } else {
00891     sel = SPR_SELECT_TILE + SlopeToSpriteOffset(ti->tileh);
00892   }
00893   DrawSelectionSprite(sel, pal, ti, 7, FOUNDATION_PART_NORMAL);
00894 }
00895 
00896 static bool IsPartOfAutoLine(int px, int py)
00897 {
00898   px -= _thd.selstart.x;
00899   py -= _thd.selstart.y;
00900 
00901   if ((_thd.drawstyle & ~HT_DIR_MASK) != HT_LINE) return false;
00902 
00903   switch (_thd.drawstyle & HT_DIR_MASK) {
00904     case HT_DIR_X:  return py == 0; // x direction
00905     case HT_DIR_Y:  return px == 0; // y direction
00906     case HT_DIR_HU: return px == -py || px == -py - 16; // horizontal upper
00907     case HT_DIR_HL: return px == -py || px == -py + 16; // horizontal lower
00908     case HT_DIR_VL: return px == py || px == py + 16; // vertical left
00909     case HT_DIR_VR: return px == py || px == py - 16; // vertical right
00910     default:
00911       NOT_REACHED();
00912   }
00913 }
00914 
00915 /* [direction][side] */
00916 static const HighLightStyle _autorail_type[6][2] = {
00917   { HT_DIR_X,  HT_DIR_X },
00918   { HT_DIR_Y,  HT_DIR_Y },
00919   { HT_DIR_HU, HT_DIR_HL },
00920   { HT_DIR_HL, HT_DIR_HU },
00921   { HT_DIR_VL, HT_DIR_VR },
00922   { HT_DIR_VR, HT_DIR_VL }
00923 };
00924 
00925 #include "table/autorail.h"
00926 
00933 static void DrawAutorailSelection(const TileInfo *ti, uint autorail_type)
00934 {
00935   SpriteID image;
00936   PaletteID pal;
00937   int offset;
00938 
00939   FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
00940   Slope autorail_tileh = RemoveHalftileSlope(ti->tileh);
00941   if (IsHalftileSlope(ti->tileh)) {
00942     static const uint _lower_rail[4] = { 5U, 2U, 4U, 3U };
00943     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
00944     if (autorail_type != _lower_rail[halftile_corner]) {
00945       foundation_part = FOUNDATION_PART_HALFTILE;
00946       /* Here we draw the highlights of the "three-corners-raised"-slope. That looks ok to me. */
00947       autorail_tileh = SlopeWithThreeCornersRaised(OppositeCorner(halftile_corner));
00948     }
00949   }
00950 
00951   offset = _AutorailTilehSprite[autorail_tileh][autorail_type];
00952   if (offset >= 0) {
00953     image = SPR_AUTORAIL_BASE + offset;
00954     pal = PAL_NONE;
00955   } else {
00956     image = SPR_AUTORAIL_BASE - offset;
00957     pal = PALETTE_SEL_TILE_RED;
00958   }
00959 
00960   DrawSelectionSprite(image, _thd.make_square_red ? PALETTE_SEL_TILE_RED : pal, ti, 7, foundation_part);
00961 }
00962 
00967 static void DrawTileSelection(const TileInfo *ti)
00968 {
00969   /* Draw a red error square? */
00970   bool is_redsq = _thd.redsq == ti->tile;
00971   if (is_redsq) DrawTileSelectionRect(ti, PALETTE_TILE_RED_PULSATING);
00972 
00973   /* no selection active? */
00974   if (_thd.drawstyle == 0) return;
00975 
00976   if (_thd.diagonal) { // We're drawing a 45 degrees rotated (diagonal) rectangle
00977     if (IsInsideRotatedRectangle((int)ti->x, (int)ti->y)) {
00978       if (_thd.drawstyle & HT_RECT) { // Highlighting a square (clear land)
00979         /* Don't mark tiles outside the map. */
00980         if (!IsValidTile(ti->tile)) return;
00981 
00982         SpriteID image = SPR_SELECT_TILE + SlopeToSpriteOffset(ti->tileh);
00983         DrawSelectionSprite(image, _thd.make_square_red ? PALETTE_SEL_TILE_RED : PAL_NONE, ti, 7, FOUNDATION_PART_NORMAL);
00984       } else { // Highlighting a dot (level land)
00985         /* Figure out the Z coordinate for the single dot. */
00986         byte z = ti->z;
00987         if (ti->tileh & SLOPE_N) {
00988           z += TILE_HEIGHT;
00989           if (!(ti->tileh & SLOPE_S) && (ti->tileh & SLOPE_STEEP)) {
00990             z += TILE_HEIGHT;
00991           }
00992         }
00993         AddTileSpriteToDraw(_cur_dpi->zoom != 2 ? SPR_DOT : SPR_DOT_SMALL, PAL_NONE, ti->x, ti->y, z);
00994       }
00995     }
00996     return;
00997   }
00998 
00999   /* Inside the inner area? */
01000   if (IsInsideBS(ti->x, _thd.pos.x, _thd.size.x) &&
01001       IsInsideBS(ti->y, _thd.pos.y, _thd.size.y)) {
01002     if (_thd.drawstyle & HT_RECT) {
01003       if (!is_redsq) DrawTileSelectionRect(ti, _thd.make_square_red ? PALETTE_SEL_TILE_RED : PAL_NONE);
01004     } else if (_thd.drawstyle & HT_POINT) {
01005       /* Figure out the Z coordinate for the single dot. */
01006       byte z = 0;
01007       FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
01008       if (ti->tileh & SLOPE_N) {
01009         z += TILE_HEIGHT;
01010         if (RemoveHalftileSlope(ti->tileh) == SLOPE_STEEP_N) z += TILE_HEIGHT;
01011       }
01012       if (IsHalftileSlope(ti->tileh)) {
01013         Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
01014         if ((halftile_corner == CORNER_W) || (halftile_corner == CORNER_E)) z += TILE_HEIGHT;
01015         if (halftile_corner != CORNER_S) {
01016           foundation_part = FOUNDATION_PART_HALFTILE;
01017           if (IsSteepSlope(ti->tileh)) z -= TILE_HEIGHT;
01018         }
01019       }
01020       DrawSelectionSprite(_cur_dpi->zoom <= ZOOM_LVL_DETAIL ? SPR_DOT : SPR_DOT_SMALL, PAL_NONE, ti, z, foundation_part);
01021     } else if (_thd.drawstyle & HT_RAIL) {
01022       /* autorail highlight piece under cursor */
01023       HighLightStyle type = _thd.drawstyle & HT_DIR_MASK;
01024       assert(type < HT_DIR_END);
01025       DrawAutorailSelection(ti, _autorail_type[type][0]);
01026     } else if (IsPartOfAutoLine(ti->x, ti->y)) {
01027       /* autorail highlighting long line */
01028       HighLightStyle dir = _thd.drawstyle & HT_DIR_MASK;
01029       uint side;
01030 
01031       if (dir == HT_DIR_X || dir == HT_DIR_Y) {
01032         side = 0;
01033       } else {
01034         TileIndex start = TileVirtXY(_thd.selstart.x, _thd.selstart.y);
01035         side = Delta(Delta(TileX(start), TileX(ti->tile)), Delta(TileY(start), TileY(ti->tile)));
01036       }
01037 
01038       DrawAutorailSelection(ti, _autorail_type[dir][side]);
01039     }
01040     return;
01041   }
01042 
01043   /* Check if it's inside the outer area? */
01044   if (!is_redsq && _thd.outersize.x &&
01045       _thd.size.x < _thd.size.x + _thd.outersize.x &&
01046       IsInsideBS(ti->x, _thd.pos.x + _thd.offs.x, _thd.size.x + _thd.outersize.x) &&
01047       IsInsideBS(ti->y, _thd.pos.y + _thd.offs.y, _thd.size.y + _thd.outersize.y)) {
01048     /* Draw a blue rect. */
01049     DrawTileSelectionRect(ti, PALETTE_SEL_TILE_BLUE);
01050     return;
01051   }
01052 }
01053 
01054 static void ViewportAddLandscape()
01055 {
01056   int x, y, width, height;
01057   TileInfo ti;
01058   bool direction;
01059 
01060   _cur_ti = &ti;
01061 
01062   /* Transform into tile coordinates and round to closest full tile */
01063   x = ((_vd.dpi.top >> 1) - (_vd.dpi.left >> 2)) & ~TILE_UNIT_MASK;
01064   y = ((_vd.dpi.top >> 1) + (_vd.dpi.left >> 2) - TILE_SIZE) & ~TILE_UNIT_MASK;
01065 
01066   /* determine size of area */
01067   {
01068     Point pt = RemapCoords(x, y, 241);
01069     width = (_vd.dpi.left + _vd.dpi.width - pt.x + 95) >> 6;
01070     height = (_vd.dpi.top + _vd.dpi.height - pt.y) >> 5 << 1;
01071   }
01072 
01073   assert(width > 0);
01074   assert(height > 0);
01075 
01076   direction = false;
01077 
01078   do {
01079     int width_cur = width;
01080     uint x_cur = x;
01081     uint y_cur = y;
01082 
01083     do {
01084       TileType tt = MP_VOID;
01085 
01086       ti.x = x_cur;
01087       ti.y = y_cur;
01088 
01089       ti.z = 0;
01090 
01091       ti.tileh = SLOPE_FLAT;
01092       ti.tile = INVALID_TILE;
01093 
01094       if (x_cur < MapMaxX() * TILE_SIZE &&
01095           y_cur < MapMaxY() * TILE_SIZE) {
01096         TileIndex tile = TileVirtXY(x_cur, y_cur);
01097 
01098         if (!_settings_game.construction.freeform_edges || (TileX(tile) != 0 && TileY(tile) != 0)) {
01099           if (x_cur == ((int)MapMaxX() - 1) * TILE_SIZE || y_cur == ((int)MapMaxY() - 1) * TILE_SIZE) {
01100             uint maxh = max<uint>(TileHeight(tile), 1);
01101             for (uint h = 0; h < maxh; h++) {
01102               AddTileSpriteToDraw(SPR_SHADOW_CELL, PAL_NONE, ti.x, ti.y, h * TILE_HEIGHT);
01103             }
01104           }
01105 
01106           ti.tile = tile;
01107           ti.tileh = GetTileSlope(tile, &ti.z);
01108           tt = GetTileType(tile);
01109         }
01110       }
01111 
01112       _vd.foundation_part = FOUNDATION_PART_NONE;
01113       _vd.foundation[0] = -1;
01114       _vd.foundation[1] = -1;
01115       _vd.last_foundation_child[0] = NULL;
01116       _vd.last_foundation_child[1] = NULL;
01117 
01118       _tile_type_procs[tt]->draw_tile_proc(&ti);
01119 
01120       if ((x_cur == (int)MapMaxX() * TILE_SIZE && IsInsideMM(y_cur, 0, MapMaxY() * TILE_SIZE + 1)) ||
01121           (y_cur == (int)MapMaxY() * TILE_SIZE && IsInsideMM(x_cur, 0, MapMaxX() * TILE_SIZE + 1))) {
01122         TileIndex tile = TileVirtXY(x_cur, y_cur);
01123         ti.tile = tile;
01124         ti.tileh = GetTileSlope(tile, &ti.z);
01125         tt = GetTileType(tile);
01126       }
01127       if (ti.tile != INVALID_TILE) DrawTileSelection(&ti);
01128 
01129       y_cur += 0x10;
01130       x_cur -= 0x10;
01131     } while (--width_cur);
01132 
01133     if ((direction ^= 1) != 0) {
01134       y += 0x10;
01135     } else {
01136       x += 0x10;
01137     }
01138   } while (--height);
01139 }
01140 
01151 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)
01152 {
01153   bool small = dpi->zoom >= small_from;
01154 
01155   int left   = dpi->left;
01156   int top    = dpi->top;
01157   int right  = left + dpi->width;
01158   int bottom = top + dpi->height;
01159 
01160   int sign_height     = ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM, dpi->zoom);
01161   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, dpi->zoom);
01162 
01163   if (bottom < sign->top ||
01164       top   > sign->top + sign_height ||
01165       right < sign->center - sign_half_width ||
01166       left  > sign->center + sign_half_width) {
01167     return;
01168   }
01169 
01170   if (!small) {
01171     AddStringToDraw(sign->center - sign_half_width, sign->top, string_normal, params_1, params_2, colour, sign->width_normal);
01172   } else {
01173     int shadow_offset = 0;
01174     if (string_small_shadow != STR_NULL) {
01175       shadow_offset = 4;
01176       AddStringToDraw(sign->center - sign_half_width + shadow_offset, sign->top, string_small_shadow, params_1, params_2, INVALID_COLOUR, sign->width_small);
01177     }
01178     AddStringToDraw(sign->center - sign_half_width, sign->top - shadow_offset, string_small, params_1, params_2,
01179         colour, sign->width_small | 0x8000);
01180   }
01181 }
01182 
01183 static void ViewportAddTownNames(DrawPixelInfo *dpi)
01184 {
01185   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES) || _game_mode == GM_MENU) return;
01186 
01187   const Town *t;
01188   FOR_ALL_TOWNS(t) {
01189     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &t->sign,
01190         _settings_client.gui.population_in_label ? STR_VIEWPORT_TOWN_POP : STR_VIEWPORT_TOWN,
01191         STR_VIEWPORT_TOWN_TINY_WHITE, STR_VIEWPORT_TOWN_TINY_BLACK,
01192         t->index, t->population);
01193   }
01194 }
01195 
01196 
01197 static void ViewportAddStationNames(DrawPixelInfo *dpi)
01198 {
01199   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || _game_mode == GM_MENU) return;
01200 
01201   const BaseStation *st;
01202   FOR_ALL_BASE_STATIONS(st) {
01203     /* Check whether the base station is a station or a waypoint */
01204     bool is_station = Station::IsExpected(st);
01205 
01206     /* Don't draw if the display options are disabled */
01207     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
01208 
01209     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &st->sign,
01210         is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT,
01211         (is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT) + 1, STR_NULL,
01212         st->index, st->facilities, (st->owner == OWNER_NONE || !st->IsInUse()) ? COLOUR_GREY : _company_colours[st->owner]);
01213   }
01214 }
01215 
01216 
01217 static void ViewportAddSigns(DrawPixelInfo *dpi)
01218 {
01219   /* Signs are turned off or are invisible */
01220   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS)) return;
01221 
01222   const Sign *si;
01223   FOR_ALL_SIGNS(si) {
01224     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &si->sign,
01225         STR_WHITE_SIGN,
01226         IsTransparencySet(TO_SIGNS) ? STR_VIEWPORT_SIGN_SMALL_WHITE : STR_VIEWPORT_SIGN_SMALL_BLACK, STR_NULL,
01227         si->index, 0, (si->owner == OWNER_NONE) ? COLOUR_GREY : _company_colours[si->owner]);
01228   }
01229 }
01230 
01237 void ViewportSign::UpdatePosition(int center, int top, StringID str)
01238 {
01239   if (this->width_normal != 0) this->MarkDirty();
01240 
01241   this->top = top;
01242 
01243   char buffer[DRAW_STRING_BUFFER];
01244 
01245   GetString(buffer, str, lastof(buffer));
01246   this->width_normal = VPSM_LEFT + Align(GetStringBoundingBox(buffer).width, 2) + VPSM_RIGHT;
01247   this->center = center;
01248 
01249   /* zoomed out version */
01250   this->width_small = VPSM_LEFT + Align(GetStringBoundingBox(buffer, FS_SMALL).width, 2) + VPSM_RIGHT;
01251 
01252   this->MarkDirty();
01253 }
01254 
01260 void ViewportSign::MarkDirty() const
01261 {
01262   /* We use ZOOM_LVL_MAX here, as every viewport can have another zoom,
01263    *  and there is no way for us to know which is the biggest. So make the
01264    *  biggest area dirty, and we are safe for sure.
01265    * We also add 1 to make sure the whole thing is redrawn. */
01266   MarkAllViewportsDirty(
01267     this->center - ScaleByZoom(this->width_normal / 2 + 1, ZOOM_LVL_MAX),
01268     this->top    - ScaleByZoom(1, ZOOM_LVL_MAX),
01269     this->center + ScaleByZoom(this->width_normal / 2 + 1, ZOOM_LVL_MAX),
01270     this->top    + ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM + 1, ZOOM_LVL_MAX));
01271 }
01272 
01273 static void ViewportDrawTileSprites(const TileSpriteToDrawVector *tstdv)
01274 {
01275   const TileSpriteToDraw *tsend = tstdv->End();
01276   for (const TileSpriteToDraw *ts = tstdv->Begin(); ts != tsend; ++ts) {
01277     DrawSprite(ts->image, ts->pal, ts->x, ts->y, ts->sub);
01278   }
01279 }
01280 
01282 static void ViewportSortParentSprites(ParentSpriteToSortVector *psdv)
01283 {
01284   ParentSpriteToDraw **psdvend = psdv->End();
01285   ParentSpriteToDraw **psd = psdv->Begin();
01286   while (psd != psdvend) {
01287     ParentSpriteToDraw *ps = *psd;
01288 
01289     if (ps->comparison_done) {
01290       psd++;
01291       continue;
01292     }
01293 
01294     ps->comparison_done = true;
01295 
01296     for (ParentSpriteToDraw **psd2 = psd + 1; psd2 != psdvend; psd2++) {
01297       ParentSpriteToDraw *ps2 = *psd2;
01298 
01299       if (ps2->comparison_done) continue;
01300 
01301       /* Decide which comparator to use, based on whether the bounding
01302        * boxes overlap
01303        */
01304       if (ps->xmax >= ps2->xmin && ps->xmin <= ps2->xmax && // overlap in X?
01305           ps->ymax >= ps2->ymin && ps->ymin <= ps2->ymax && // overlap in Y?
01306           ps->zmax >= ps2->zmin && ps->zmin <= ps2->zmax) { // overlap in Z?
01307         /* Use X+Y+Z as the sorting order, so sprites closer to the bottom of
01308          * the screen and with higher Z elevation, are drawn in front.
01309          * Here X,Y,Z are the coordinates of the "center of mass" of the sprite,
01310          * i.e. X=(left+right)/2, etc.
01311          * However, since we only care about order, don't actually divide / 2
01312          */
01313         if (ps->xmin + ps->xmax + ps->ymin + ps->ymax + ps->zmin + ps->zmax <=
01314             ps2->xmin + ps2->xmax + ps2->ymin + ps2->ymax + ps2->zmin + ps2->zmax) {
01315           continue;
01316         }
01317       } else {
01318         /* We only change the order, if it is definite.
01319          * I.e. every single order of X, Y, Z says ps2 is behind ps or they overlap.
01320          * That is: If one partial order says ps behind ps2, do not change the order.
01321          */
01322         if (ps->xmax < ps2->xmin ||
01323             ps->ymax < ps2->ymin ||
01324             ps->zmax < ps2->zmin) {
01325           continue;
01326         }
01327       }
01328 
01329       /* Move ps2 in front of ps */
01330       ParentSpriteToDraw *temp = ps2;
01331       for (ParentSpriteToDraw **psd3 = psd2; psd3 > psd; psd3--) {
01332         *psd3 = *(psd3 - 1);
01333       }
01334       *psd = temp;
01335     }
01336   }
01337 }
01338 
01339 static void ViewportDrawParentSprites(const ParentSpriteToSortVector *psd, const ChildScreenSpriteToDrawVector *csstdv)
01340 {
01341   const ParentSpriteToDraw * const *psd_end = psd->End();
01342   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
01343     const ParentSpriteToDraw *ps = *it;
01344     if (ps->image != SPR_EMPTY_BOUNDING_BOX) DrawSprite(ps->image, ps->pal, ps->x, ps->y, ps->sub);
01345 
01346     int child_idx = ps->first_child;
01347     while (child_idx >= 0) {
01348       const ChildScreenSpriteToDraw *cs = csstdv->Get(child_idx);
01349       child_idx = cs->next;
01350       DrawSprite(cs->image, cs->pal, ps->left + cs->x, ps->top + cs->y, cs->sub);
01351     }
01352   }
01353 }
01354 
01359 static void ViewportDrawBoundingBoxes(const ParentSpriteToSortVector *psd)
01360 {
01361   const ParentSpriteToDraw * const *psd_end = psd->End();
01362   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
01363     const ParentSpriteToDraw *ps = *it;
01364     Point pt1 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmax + 1); // top front corner
01365     Point pt2 = RemapCoords(ps->xmin    , ps->ymax + 1, ps->zmax + 1); // top left corner
01366     Point pt3 = RemapCoords(ps->xmax + 1, ps->ymin    , ps->zmax + 1); // top right corner
01367     Point pt4 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmin    ); // bottom front corner
01368 
01369     DrawBox(        pt1.x,         pt1.y,
01370             pt2.x - pt1.x, pt2.y - pt1.y,
01371             pt3.x - pt1.x, pt3.y - pt1.y,
01372             pt4.x - pt1.x, pt4.y - pt1.y);
01373   }
01374 }
01375 
01376 static void ViewportDrawStrings(DrawPixelInfo *dpi, const StringSpriteToDrawVector *sstdv)
01377 {
01378   DrawPixelInfo dp;
01379   ZoomLevel zoom;
01380 
01381   _cur_dpi = &dp;
01382   dp = *dpi;
01383 
01384   zoom = dp.zoom;
01385   dp.zoom = ZOOM_LVL_NORMAL;
01386 
01387   dp.left   = UnScaleByZoom(dp.left,   zoom);
01388   dp.top    = UnScaleByZoom(dp.top,    zoom);
01389   dp.width  = UnScaleByZoom(dp.width,  zoom);
01390   dp.height = UnScaleByZoom(dp.height, zoom);
01391 
01392   const StringSpriteToDraw *ssend = sstdv->End();
01393   for (const StringSpriteToDraw *ss = sstdv->Begin(); ss != ssend; ++ss) {
01394     TextColour colour = TC_BLACK;
01395     bool small = HasBit(ss->width, 15);
01396     int w = GB(ss->width, 0, 15);
01397     int x = UnScaleByZoom(ss->x, zoom);
01398     int y = UnScaleByZoom(ss->y, zoom);
01399     int h = VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM;
01400 
01401     SetDParam(0, ss->params[0]);
01402     SetDParam(1, ss->params[1]);
01403 
01404     if (ss->colour != INVALID_COLOUR) {
01405       /* Do not draw signs nor station names if they are set invisible */
01406       if (IsInvisibilitySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) continue;
01407 
01408       /* if we didn't draw a rectangle, or if transparant building is on,
01409        * draw the text in the colour the rectangle would have */
01410       if (IsTransparencySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) {
01411         /* Real colours need the IS_PALETTE_COLOUR flag
01412          * otherwise colours from _string_colourmap are assumed. */
01413         colour = (TextColour)_colour_gradient[ss->colour][6] | IS_PALETTE_COLOUR;
01414       }
01415 
01416       /* Draw the rectangle if 'tranparent station signs' is off,
01417        * or if we are drawing a general text sign (STR_WHITE_SIGN) */
01418       if (!IsTransparencySet(TO_SIGNS) || ss->string == STR_WHITE_SIGN) {
01419         DrawFrameRect(
01420           x, y, x + w, y + h, ss->colour,
01421           IsTransparencySet(TO_SIGNS) ? FR_TRANSPARENT : FR_NONE
01422         );
01423       }
01424     }
01425 
01426     DrawString(x + VPSM_LEFT, x + w - 1 - VPSM_RIGHT, y + VPSM_TOP, ss->string, colour, SA_HOR_CENTER);
01427   }
01428 }
01429 
01430 void ViewportDoDraw(const ViewPort *vp, int left, int top, int right, int bottom)
01431 {
01432   DrawPixelInfo *old_dpi = _cur_dpi;
01433   _cur_dpi = &_vd.dpi;
01434 
01435   _vd.dpi.zoom = vp->zoom;
01436   int mask = ScaleByZoom(-1, vp->zoom);
01437 
01438   _vd.combine_sprites = SPRITE_COMBINE_NONE;
01439 
01440   _vd.dpi.width = (right - left) & mask;
01441   _vd.dpi.height = (bottom - top) & mask;
01442   _vd.dpi.left = left & mask;
01443   _vd.dpi.top = top & mask;
01444   _vd.dpi.pitch = old_dpi->pitch;
01445   _vd.last_child = NULL;
01446 
01447   int x = UnScaleByZoom(_vd.dpi.left - (vp->virtual_left & mask), vp->zoom) + vp->left;
01448   int y = UnScaleByZoom(_vd.dpi.top - (vp->virtual_top & mask), vp->zoom) + vp->top;
01449 
01450   _vd.dpi.dst_ptr = BlitterFactoryBase::GetCurrentBlitter()->MoveTo(old_dpi->dst_ptr, x - old_dpi->left, y - old_dpi->top);
01451 
01452   ViewportAddLandscape();
01453   ViewportAddVehicles(&_vd.dpi);
01454 
01455   ViewportAddTownNames(&_vd.dpi);
01456   ViewportAddStationNames(&_vd.dpi);
01457   ViewportAddSigns(&_vd.dpi);
01458 
01459   DrawTextEffects(&_vd.dpi);
01460 
01461   if (_vd.tile_sprites_to_draw.Length() != 0) ViewportDrawTileSprites(&_vd.tile_sprites_to_draw);
01462 
01463   ParentSpriteToDraw *psd_end = _vd.parent_sprites_to_draw.End();
01464   for (ParentSpriteToDraw *it = _vd.parent_sprites_to_draw.Begin(); it != psd_end; it++) {
01465     *_vd.parent_sprites_to_sort.Append() = it;
01466   }
01467 
01468   ViewportSortParentSprites(&_vd.parent_sprites_to_sort);
01469   ViewportDrawParentSprites(&_vd.parent_sprites_to_sort, &_vd.child_screen_sprites_to_draw);
01470 
01471   if (_draw_bounding_boxes) ViewportDrawBoundingBoxes(&_vd.parent_sprites_to_sort);
01472 
01473   if (_vd.string_sprites_to_draw.Length() != 0) ViewportDrawStrings(&_vd.dpi, &_vd.string_sprites_to_draw);
01474 
01475   _cur_dpi = old_dpi;
01476 
01477   _vd.string_sprites_to_draw.Clear();
01478   _vd.tile_sprites_to_draw.Clear();
01479   _vd.parent_sprites_to_draw.Clear();
01480   _vd.parent_sprites_to_sort.Clear();
01481   _vd.child_screen_sprites_to_draw.Clear();
01482 }
01483 
01488 static void ViewportDrawChk(const ViewPort *vp, int left, int top, int right, int bottom)
01489 {
01490   if (ScaleByZoom(bottom - top, vp->zoom) * ScaleByZoom(right - left, vp->zoom) > 180000) {
01491     if ((bottom - top) > (right - left)) {
01492       int t = (top + bottom) >> 1;
01493       ViewportDrawChk(vp, left, top, right, t);
01494       ViewportDrawChk(vp, left, t, right, bottom);
01495     } else {
01496       int t = (left + right) >> 1;
01497       ViewportDrawChk(vp, left, top, t, bottom);
01498       ViewportDrawChk(vp, t, top, right, bottom);
01499     }
01500   } else {
01501     ViewportDoDraw(vp,
01502       ScaleByZoom(left - vp->left, vp->zoom) + vp->virtual_left,
01503       ScaleByZoom(top - vp->top, vp->zoom) + vp->virtual_top,
01504       ScaleByZoom(right - vp->left, vp->zoom) + vp->virtual_left,
01505       ScaleByZoom(bottom - vp->top, vp->zoom) + vp->virtual_top
01506     );
01507   }
01508 }
01509 
01510 static inline void ViewportDraw(const ViewPort *vp, int left, int top, int right, int bottom)
01511 {
01512   if (right <= vp->left || bottom <= vp->top) return;
01513 
01514   if (left >= vp->left + vp->width) return;
01515 
01516   if (left < vp->left) left = vp->left;
01517   if (right > vp->left + vp->width) right = vp->left + vp->width;
01518 
01519   if (top >= vp->top + vp->height) return;
01520 
01521   if (top < vp->top) top = vp->top;
01522   if (bottom > vp->top + vp->height) bottom = vp->top + vp->height;
01523 
01524   ViewportDrawChk(vp, left, top, right, bottom);
01525 }
01526 
01530 void Window::DrawViewport() const
01531 {
01532   DrawPixelInfo *dpi = _cur_dpi;
01533 
01534   dpi->left += this->left;
01535   dpi->top += this->top;
01536 
01537   ViewportDraw(this->viewport, dpi->left, dpi->top, dpi->left + dpi->width, dpi->top + dpi->height);
01538 
01539   dpi->left -= this->left;
01540   dpi->top -= this->top;
01541 }
01542 
01543 static inline void ClampViewportToMap(const ViewPort *vp, int &x, int &y)
01544 {
01545   /* Centre of the viewport is hot spot */
01546   x += vp->virtual_width / 2;
01547   y += vp->virtual_height / 2;
01548 
01549   /* Convert viewport coordinates to map coordinates
01550    * Calculation is scaled by 4 to avoid rounding errors */
01551   int vx = -x + y * 2;
01552   int vy =  x + y * 2;
01553 
01554   /* clamp to size of map */
01555   vx = Clamp(vx, 0, MapMaxX() * TILE_SIZE * 4);
01556   vy = Clamp(vy, 0, MapMaxY() * TILE_SIZE * 4);
01557 
01558   /* Convert map coordinates to viewport coordinates */
01559   x = (-vx + vy) / 2;
01560   y = ( vx + vy) / 4;
01561 
01562   /* Remove centering */
01563   x -= vp->virtual_width / 2;
01564   y -= vp->virtual_height / 2;
01565 }
01566 
01571 void UpdateViewportPosition(Window *w)
01572 {
01573   const ViewPort *vp = w->viewport;
01574 
01575   if (w->viewport->follow_vehicle != INVALID_VEHICLE) {
01576     const Vehicle *veh = Vehicle::Get(w->viewport->follow_vehicle);
01577     Point pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
01578 
01579     w->viewport->scrollpos_x = pt.x;
01580     w->viewport->scrollpos_y = pt.y;
01581     SetViewportPosition(w, pt.x, pt.y);
01582   } else {
01583     /* Ensure the destination location is within the map */
01584     ClampViewportToMap(vp, w->viewport->dest_scrollpos_x, w->viewport->dest_scrollpos_y);
01585 
01586     int delta_x = w->viewport->dest_scrollpos_x - w->viewport->scrollpos_x;
01587     int delta_y = w->viewport->dest_scrollpos_y - w->viewport->scrollpos_y;
01588 
01589     if (delta_x != 0 || delta_y != 0) {
01590       if (_settings_client.gui.smooth_scroll) {
01591         int max_scroll = ScaleByMapSize1D(512);
01592         /* Not at our desired position yet... */
01593         w->viewport->scrollpos_x += Clamp(delta_x / 4, -max_scroll, max_scroll);
01594         w->viewport->scrollpos_y += Clamp(delta_y / 4, -max_scroll, max_scroll);
01595       } else {
01596         w->viewport->scrollpos_x = w->viewport->dest_scrollpos_x;
01597         w->viewport->scrollpos_y = w->viewport->dest_scrollpos_y;
01598       }
01599     }
01600 
01601     ClampViewportToMap(vp, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
01602 
01603     SetViewportPosition(w, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
01604   }
01605 }
01606 
01616 static void MarkViewportDirty(const ViewPort *vp, int left, int top, int right, int bottom)
01617 {
01618   right -= vp->virtual_left;
01619   if (right <= 0) return;
01620 
01621   bottom -= vp->virtual_top;
01622   if (bottom <= 0) return;
01623 
01624   left = max(0, left - vp->virtual_left);
01625 
01626   if (left >= vp->virtual_width) return;
01627 
01628   top = max(0, top - vp->virtual_top);
01629 
01630   if (top >= vp->virtual_height) return;
01631 
01632   SetDirtyBlocks(
01633     UnScaleByZoomLower(left, vp->zoom) + vp->left,
01634     UnScaleByZoomLower(top, vp->zoom) + vp->top,
01635     UnScaleByZoom(right, vp->zoom) + vp->left + 1,
01636     UnScaleByZoom(bottom, vp->zoom) + vp->top + 1
01637   );
01638 }
01639 
01648 void MarkAllViewportsDirty(int left, int top, int right, int bottom)
01649 {
01650   Window *w;
01651   FOR_ALL_WINDOWS_FROM_BACK(w) {
01652     ViewPort *vp = w->viewport;
01653     if (vp != NULL) {
01654       assert(vp->width != 0);
01655       MarkViewportDirty(vp, left, top, right, bottom);
01656     }
01657   }
01658 }
01659 
01660 void MarkTileDirtyByTile(TileIndex tile)
01661 {
01662   Point pt = RemapCoords(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, GetTileZ(tile));
01663   MarkAllViewportsDirty(
01664     pt.x - 31,
01665     pt.y - 122,
01666     pt.x - 31 + 67,
01667     pt.y - 122 + 154
01668   );
01669 }
01670 
01678 static void SetSelectionTilesDirty()
01679 {
01680   int x_size = _thd.size.x;
01681   int y_size = _thd.size.y;
01682 
01683   if (!_thd.diagonal) { // Selecting in a straigth rectangle (or a single square)
01684     int x_start = _thd.pos.x;
01685     int y_start = _thd.pos.y;
01686 
01687     if (_thd.outersize.x != 0) {
01688       x_size  += _thd.outersize.x;
01689       x_start += _thd.offs.x;
01690       y_size  += _thd.outersize.y;
01691       y_start += _thd.offs.y;
01692     }
01693 
01694     x_size -= TILE_SIZE;
01695     y_size -= TILE_SIZE;
01696 
01697     assert(x_size >= 0);
01698     assert(y_size >= 0);
01699 
01700     int x_end = Clamp(x_start + x_size, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
01701     int y_end = Clamp(y_start + y_size, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
01702 
01703     x_start = Clamp(x_start, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
01704     y_start = Clamp(y_start, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
01705 
01706     /* make sure everything is multiple of TILE_SIZE */
01707     assert((x_end | y_end | x_start | y_start) % TILE_SIZE == 0);
01708 
01709     /* How it works:
01710      * Suppose we have to mark dirty rectangle of 3x4 tiles:
01711      *   x
01712      *  xxx
01713      * xxxxx
01714      *  xxxxx
01715      *   xxx
01716      *    x
01717      * This algorithm marks dirty columns of tiles, so it is done in 3+4-1 steps:
01718      * 1)  x     2)  x
01719      *    xxx       Oxx
01720      *   Oxxxx     xOxxx
01721      *    xxxxx     Oxxxx
01722      *     xxx       xxx
01723      *      x         x
01724      * And so forth...
01725      */
01726 
01727     int top_x = x_end; // coordinates of top dirty tile
01728     int top_y = y_start;
01729     int bot_x = top_x; // coordinates of bottom dirty tile
01730     int bot_y = top_y;
01731 
01732     do {
01733       Point top = RemapCoords2(top_x, top_y); // topmost dirty point
01734       Point bot = RemapCoords2(bot_x + TILE_SIZE - 1, bot_y + TILE_SIZE - 1); // bottommost point
01735 
01736       /* the 'x' coordinate of 'top' and 'bot' is the same (and always in the same distance from tile middle),
01737        * tile height/slope affects only the 'y' on-screen coordinate! */
01738 
01739       int l = top.x - (TILE_PIXELS - 2); // 'x' coordinate of left side of dirty rectangle
01740       int t = top.y;                     // 'y' coordinate of top side -//-
01741       int r = top.x + (TILE_PIXELS - 2); // right side of dirty rectangle
01742       int b = bot.y;                     // bottom -//-
01743 
01744       static const int OVERLAY_WIDTH = 4; // part of selection sprites is drawn outside the selected area
01745 
01746       /* For halftile foundations on SLOPE_STEEP_S the sprite extents some more towards the top */
01747       MarkAllViewportsDirty(l - OVERLAY_WIDTH, t - OVERLAY_WIDTH - TILE_HEIGHT, r + OVERLAY_WIDTH, b + OVERLAY_WIDTH);
01748 
01749       /* haven't we reached the topmost tile yet? */
01750       if (top_x != x_start) {
01751         top_x -= TILE_SIZE;
01752       } else {
01753         top_y += TILE_SIZE;
01754       }
01755 
01756       /* the way the bottom tile changes is different when we reach the bottommost tile */
01757       if (bot_y != y_end) {
01758         bot_y += TILE_SIZE;
01759       } else {
01760         bot_x -= TILE_SIZE;
01761       }
01762     } while (bot_x >= top_x);
01763   } else { // Selecting in a 45 degrees rotated (diagonal) rectangle.
01764     /* a_size, b_size describe a rectangle with rotated coordinates */
01765     int a_size = x_size + y_size, b_size = x_size - y_size;
01766 
01767     int interval_a = a_size < 0 ? -(int)TILE_SIZE : (int)TILE_SIZE;
01768     int interval_b = b_size < 0 ? -(int)TILE_SIZE : (int)TILE_SIZE;
01769 
01770     for (int a = -interval_a; a != a_size + interval_a; a += interval_a) {
01771       for (int b = -interval_b; b != b_size + interval_b; b += interval_b) {
01772         uint x = (_thd.pos.x + (a + b) / 2) / TILE_SIZE;
01773         uint y = (_thd.pos.y + (a - b) / 2) / TILE_SIZE;
01774 
01775         if (x < MapMaxX() && y < MapMaxY()) {
01776           MarkTileDirtyByTile(TileXY(x, y));
01777         }
01778       }
01779     }
01780   }
01781 }
01782 
01783 
01784 void SetSelectionRed(bool b)
01785 {
01786   _thd.make_square_red = b;
01787   SetSelectionTilesDirty();
01788 }
01789 
01798 static bool CheckClickOnViewportSign(const ViewPort *vp, int x, int y, const ViewportSign *sign)
01799 {
01800   bool small = (vp->zoom >= ZOOM_LVL_OUT_4X);
01801   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, vp->zoom);
01802   int sign_height = ScaleByZoom(VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM, vp->zoom);
01803 
01804   x = ScaleByZoom(x - vp->left, vp->zoom) + vp->virtual_left;
01805   y = ScaleByZoom(y - vp->top, vp->zoom) + vp->virtual_top;
01806 
01807   return y >= sign->top && y < sign->top + sign_height &&
01808       x >= sign->center - sign_half_width && x < sign->center + sign_half_width;
01809 }
01810 
01811 static bool CheckClickOnTown(const ViewPort *vp, int x, int y)
01812 {
01813   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES)) return false;
01814 
01815   const Town *t;
01816   FOR_ALL_TOWNS(t) {
01817     if (CheckClickOnViewportSign(vp, x, y, &t->sign)) {
01818       ShowTownViewWindow(t->index);
01819       return true;
01820     }
01821   }
01822 
01823   return false;
01824 }
01825 
01826 static bool CheckClickOnStation(const ViewPort *vp, int x, int y)
01827 {
01828   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || IsInvisibilitySet(TO_SIGNS)) return false;
01829 
01830   const BaseStation *st;
01831   FOR_ALL_BASE_STATIONS(st) {
01832     /* Check whether the base station is a station or a waypoint */
01833     bool is_station = Station::IsExpected(st);
01834 
01835     /* Don't check if the display options are disabled */
01836     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
01837 
01838     if (CheckClickOnViewportSign(vp, x, y, &st->sign)) {
01839       if (is_station) {
01840         ShowStationViewWindow(st->index);
01841       } else {
01842         ShowWaypointWindow(Waypoint::From(st));
01843       }
01844       return true;
01845     }
01846   }
01847 
01848   return false;
01849 }
01850 
01851 
01852 static bool CheckClickOnSign(const ViewPort *vp, int x, int y)
01853 {
01854   /* Signs are turned off, or they are transparent and invisibility is ON, or company is a spectator */
01855   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS) || _local_company == COMPANY_SPECTATOR) return false;
01856 
01857   const Sign *si;
01858   FOR_ALL_SIGNS(si) {
01859     if (CheckClickOnViewportSign(vp, x, y, &si->sign)) {
01860       HandleClickOnSign(si);
01861       return true;
01862     }
01863   }
01864 
01865   return false;
01866 }
01867 
01868 
01869 static bool CheckClickOnLandscape(const ViewPort *vp, int x, int y)
01870 {
01871   Point pt = TranslateXYToTileCoord(vp, x, y);
01872 
01873   if (pt.x != -1) return ClickTile(TileVirtXY(pt.x, pt.y));
01874   return true;
01875 }
01876 
01877 static void PlaceObject()
01878 {
01879   Point pt;
01880   Window *w;
01881 
01882   pt = GetTileBelowCursor();
01883   if (pt.x == -1) return;
01884 
01885   if ((_thd.place_mode & HT_DRAG_MASK) == HT_POINT) {
01886     pt.x += 8;
01887     pt.y += 8;
01888   }
01889 
01890   _tile_fract_coords.x = pt.x & TILE_UNIT_MASK;
01891   _tile_fract_coords.y = pt.y & TILE_UNIT_MASK;
01892 
01893   w = GetCallbackWnd();
01894   if (w != NULL) w->OnPlaceObject(pt, TileVirtXY(pt.x, pt.y));
01895 }
01896 
01897 
01898 bool HandleViewportClicked(const ViewPort *vp, int x, int y)
01899 {
01900   const Vehicle *v = CheckClickOnVehicle(vp, x, y);
01901 
01902   if (_thd.place_mode & HT_VEHICLE) {
01903     if (v != NULL && VehicleClicked(v)) return true;
01904   }
01905 
01906   if (_thd.place_mode & HT_DRAG_MASK) {
01907     PlaceObject();
01908     return true;
01909   }
01910 
01911   if (CheckClickOnTown(vp, x, y)) return true;
01912   if (CheckClickOnStation(vp, x, y)) return true;
01913   if (CheckClickOnSign(vp, x, y)) return true;
01914   bool result = CheckClickOnLandscape(vp, x, y);
01915 
01916   if (v != NULL) {
01917     DEBUG(misc, 2, "Vehicle %d (index %d) at %p", v->unitnumber, v->index, v);
01918     if (IsCompanyBuildableVehicleType(v)) {
01919       v = v->First();
01920       if (_ctrl_pressed && v->owner == _local_company) {
01921         StartStopVehicle(v, true);
01922       } else {
01923         ShowVehicleViewWindow(v);
01924       }
01925     }
01926     return true;
01927   }
01928   return result;
01929 }
01930 
01931 
01941 bool ScrollWindowTo(int x, int y, int z, Window *w, bool instant)
01942 {
01943   /* The slope cannot be acquired outside of the map, so make sure we are always within the map. */
01944   if (z == -1) z = GetSlopeZ(Clamp(x, 0, MapSizeX() * TILE_SIZE - 1), Clamp(y, 0, MapSizeY() * TILE_SIZE - 1));
01945 
01946   Point pt = MapXYZToViewport(w->viewport, x, y, z);
01947   w->viewport->follow_vehicle = INVALID_VEHICLE;
01948 
01949   if (w->viewport->dest_scrollpos_x == pt.x && w->viewport->dest_scrollpos_y == pt.y) return false;
01950 
01951   if (instant) {
01952     w->viewport->scrollpos_x = pt.x;
01953     w->viewport->scrollpos_y = pt.y;
01954   }
01955 
01956   w->viewport->dest_scrollpos_x = pt.x;
01957   w->viewport->dest_scrollpos_y = pt.y;
01958   return true;
01959 }
01960 
01968 bool ScrollWindowToTile(TileIndex tile, Window *w, bool instant)
01969 {
01970   return ScrollWindowTo(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, -1, w, instant);
01971 }
01972 
01979 bool ScrollMainWindowToTile(TileIndex tile, bool instant)
01980 {
01981   return ScrollMainWindowTo(TileX(tile) * TILE_SIZE + TILE_SIZE / 2, TileY(tile) * TILE_SIZE + TILE_SIZE / 2, -1, instant);
01982 }
01983 
01988 void SetRedErrorSquare(TileIndex tile)
01989 {
01990   TileIndex old;
01991 
01992   old = _thd.redsq;
01993   _thd.redsq = tile;
01994 
01995   if (tile != old) {
01996     if (tile != INVALID_TILE) MarkTileDirtyByTile(tile);
01997     if (old  != INVALID_TILE) MarkTileDirtyByTile(old);
01998   }
01999 }
02000 
02006 void SetTileSelectSize(int w, int h)
02007 {
02008   _thd.new_size.x = w * TILE_SIZE;
02009   _thd.new_size.y = h * TILE_SIZE;
02010   _thd.new_outersize.x = 0;
02011   _thd.new_outersize.y = 0;
02012 }
02013 
02014 void SetTileSelectBigSize(int ox, int oy, int sx, int sy)
02015 {
02016   _thd.offs.x = ox * TILE_SIZE;
02017   _thd.offs.y = oy * TILE_SIZE;
02018   _thd.new_outersize.x = sx * TILE_SIZE;
02019   _thd.new_outersize.y = sy * TILE_SIZE;
02020 }
02021 
02023 static HighLightStyle GetAutorailHT(int x, int y)
02024 {
02025   return HT_RAIL | _autorail_piece[x & TILE_UNIT_MASK][y & TILE_UNIT_MASK];
02026 }
02027 
02032 bool TileHighlightData::IsDraggingDiagonal()
02033 {
02034   return (this->place_mode & HT_DIAGONAL) != 0 && _ctrl_pressed && _left_button_down;
02035 }
02036 
02044 void UpdateTileSelection()
02045 {
02046   int x1;
02047   int y1;
02048 
02049   HighLightStyle new_drawstyle = HT_NONE;
02050   bool new_diagonal = false;
02051 
02052   if ((_thd.place_mode & HT_DRAG_MASK) == HT_SPECIAL) {
02053     x1 = _thd.selend.x;
02054     y1 = _thd.selend.y;
02055     if (x1 != -1) {
02056       int x2 = _thd.selstart.x & ~TILE_UNIT_MASK;
02057       int y2 = _thd.selstart.y & ~TILE_UNIT_MASK;
02058       x1 &= ~TILE_UNIT_MASK;
02059       y1 &= ~TILE_UNIT_MASK;
02060 
02061       if (_thd.IsDraggingDiagonal()) {
02062         new_diagonal = true;
02063       } else {
02064         if (x1 >= x2) Swap(x1, x2);
02065         if (y1 >= y2) Swap(y1, y2);
02066       }
02067       _thd.new_pos.x = x1;
02068       _thd.new_pos.y = y1;
02069       _thd.new_size.x = x2 - x1;
02070       _thd.new_size.y = y2 - y1;
02071       if (!new_diagonal) {
02072         _thd.new_size.x += TILE_SIZE;
02073         _thd.new_size.y += TILE_SIZE;
02074       }
02075       new_drawstyle = _thd.next_drawstyle;
02076     }
02077   } else if ((_thd.place_mode & HT_DRAG_MASK) != HT_NONE) {
02078     Point pt = GetTileBelowCursor();
02079     x1 = pt.x;
02080     y1 = pt.y;
02081     if (x1 != -1) {
02082       switch (_thd.place_mode & HT_DRAG_MASK) {
02083         case HT_RECT:
02084           new_drawstyle = HT_RECT;
02085           break;
02086         case HT_POINT:
02087           new_drawstyle = HT_POINT;
02088           x1 += TILE_SIZE / 2;
02089           y1 += TILE_SIZE / 2;
02090           break;
02091         case HT_RAIL:
02092           /* Draw one highlighted tile in any direction */
02093           new_drawstyle = GetAutorailHT(pt.x, pt.y);
02094           break;
02095         case HT_LINE:
02096           switch (_thd.place_mode & HT_DIR_MASK) {
02097             case HT_DIR_X: new_drawstyle = HT_LINE | HT_DIR_X; break;
02098             case HT_DIR_Y: new_drawstyle = HT_LINE | HT_DIR_Y; break;
02099 
02100             case HT_DIR_HU:
02101             case HT_DIR_HL:
02102               new_drawstyle = (pt.x & TILE_UNIT_MASK) + (pt.y & TILE_UNIT_MASK) <= TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
02103               break;
02104 
02105             case HT_DIR_VL:
02106             case HT_DIR_VR:
02107               new_drawstyle = (pt.x & TILE_UNIT_MASK) > (pt.y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02108               break;
02109 
02110             default: NOT_REACHED();
02111           }
02112           _thd.selstart.x = x1 & ~TILE_UNIT_MASK;
02113           _thd.selstart.y = y1 & ~TILE_UNIT_MASK;
02114           break;
02115         default:
02116           NOT_REACHED();
02117           break;
02118       }
02119       _thd.new_pos.x = x1 & ~TILE_UNIT_MASK;
02120       _thd.new_pos.y = y1 & ~TILE_UNIT_MASK;
02121     }
02122   }
02123 
02124   /* redraw selection */
02125   if (_thd.drawstyle != new_drawstyle ||
02126       _thd.pos.x != _thd.new_pos.x || _thd.pos.y != _thd.new_pos.y ||
02127       _thd.size.x != _thd.new_size.x || _thd.size.y != _thd.new_size.y ||
02128       _thd.outersize.x != _thd.new_outersize.x ||
02129       _thd.outersize.y != _thd.new_outersize.y ||
02130       _thd.diagonal    != new_diagonal) {
02131     /* clear the old selection? */
02132     if (_thd.drawstyle) SetSelectionTilesDirty();
02133 
02134     _thd.drawstyle = new_drawstyle;
02135     _thd.pos = _thd.new_pos;
02136     _thd.size = _thd.new_size;
02137     _thd.outersize = _thd.new_outersize;
02138     _thd.diagonal = new_diagonal;
02139     _thd.dirty = 0xff;
02140 
02141     /* draw the new selection? */
02142     if (new_drawstyle != HT_NONE) SetSelectionTilesDirty();
02143   }
02144 }
02145 
02153 static inline void ShowMeasurementTooltips(StringID str, uint paramcount, const uint64 params[], TooltipCloseCondition close_cond = TCC_LEFT_CLICK)
02154 {
02155   if (!_settings_client.gui.measure_tooltip) return;
02156   GuiShowTooltips(FindWindowById(_thd.window_class, _thd.window_number), str, paramcount, params, close_cond);
02157 }
02158 
02160 void VpStartPlaceSizing(TileIndex tile, ViewportPlaceMethod method, ViewportDragDropSelectionProcess process)
02161 {
02162   _thd.select_method = method;
02163   _thd.select_proc   = process;
02164   _thd.selend.x = TileX(tile) * TILE_SIZE;
02165   _thd.selstart.x = TileX(tile) * TILE_SIZE;
02166   _thd.selend.y = TileY(tile) * TILE_SIZE;
02167   _thd.selstart.y = TileY(tile) * TILE_SIZE;
02168 
02169   /* Needed so several things (road, autoroad, bridges, ...) are placed correctly.
02170    * In effect, placement starts from the centre of a tile
02171    */
02172   if (method == VPM_X_OR_Y || method == VPM_FIX_X || method == VPM_FIX_Y) {
02173     _thd.selend.x += TILE_SIZE / 2;
02174     _thd.selend.y += TILE_SIZE / 2;
02175     _thd.selstart.x += TILE_SIZE / 2;
02176     _thd.selstart.y += TILE_SIZE / 2;
02177   }
02178 
02179   HighLightStyle others = _thd.place_mode & ~HT_DRAG_MASK;
02180   if ((_thd.place_mode & HT_DRAG_MASK) == HT_RECT) {
02181     _thd.place_mode = HT_SPECIAL | others;
02182     _thd.next_drawstyle = HT_RECT | others;
02183   } else if (_thd.place_mode & (HT_RAIL | HT_LINE)) {
02184     _thd.place_mode = HT_SPECIAL | others;
02185     _thd.next_drawstyle = _thd.drawstyle | others;
02186   } else {
02187     _thd.place_mode = HT_SPECIAL | others;
02188     _thd.next_drawstyle = HT_POINT | others;
02189   }
02190   _special_mouse_mode = WSM_SIZING;
02191 }
02192 
02193 void VpSetPlaceSizingLimit(int limit)
02194 {
02195   _thd.sizelimit = limit;
02196 }
02197 
02203 void VpSetPresizeRange(TileIndex from, TileIndex to)
02204 {
02205   uint64 distance = DistanceManhattan(from, to) + 1;
02206 
02207   _thd.selend.x = TileX(to) * TILE_SIZE;
02208   _thd.selend.y = TileY(to) * TILE_SIZE;
02209   _thd.selstart.x = TileX(from) * TILE_SIZE;
02210   _thd.selstart.y = TileY(from) * TILE_SIZE;
02211   _thd.next_drawstyle = HT_RECT;
02212 
02213   /* show measurement only if there is any length to speak of */
02214   if (distance > 1) ShowMeasurementTooltips(STR_MEASURE_LENGTH, 1, &distance, TCC_HOVER);
02215 }
02216 
02217 static void VpStartPreSizing()
02218 {
02219   _thd.selend.x = -1;
02220   _special_mouse_mode = WSM_PRESIZE;
02221 }
02222 
02227 static HighLightStyle Check2x1AutoRail(int mode)
02228 {
02229   int fxpy = _tile_fract_coords.x + _tile_fract_coords.y;
02230   int sxpy = (_thd.selend.x & TILE_UNIT_MASK) + (_thd.selend.y & TILE_UNIT_MASK);
02231   int fxmy = _tile_fract_coords.x - _tile_fract_coords.y;
02232   int sxmy = (_thd.selend.x & TILE_UNIT_MASK) - (_thd.selend.y & TILE_UNIT_MASK);
02233 
02234   switch (mode) {
02235     default: NOT_REACHED();
02236     case 0: // end piece is lower right
02237       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
02238       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
02239       return HT_DIR_Y;
02240 
02241     case 1:
02242       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
02243       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
02244       return HT_DIR_Y;
02245 
02246     case 2:
02247       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
02248       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
02249       return HT_DIR_X;
02250 
02251     case 3:
02252       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
02253       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
02254       return HT_DIR_X;
02255   }
02256 }
02257 
02271 static bool SwapDirection(HighLightStyle style, TileIndex start_tile, TileIndex end_tile)
02272 {
02273   uint start_x = TileX(start_tile);
02274   uint start_y = TileY(start_tile);
02275   uint end_x = TileX(end_tile);
02276   uint end_y = TileY(end_tile);
02277 
02278   switch (style & HT_DRAG_MASK) {
02279     case HT_RAIL:
02280     case HT_LINE: return (end_x > start_x || (end_x == start_x && end_y > start_y));
02281 
02282     case HT_RECT:
02283     case HT_POINT: return (end_x != start_x && end_y < start_y);
02284     default: NOT_REACHED();
02285   }
02286 
02287   return false;
02288 }
02289 
02305 static int CalcHeightdiff(HighLightStyle style, uint distance, TileIndex start_tile, TileIndex end_tile)
02306 {
02307   bool swap = SwapDirection(style, start_tile, end_tile);
02308   uint h0, h1; // Start height and end height.
02309 
02310   if (start_tile == end_tile) return 0;
02311   if (swap) Swap(start_tile, end_tile);
02312 
02313   switch (style & HT_DRAG_MASK) {
02314     case HT_RECT: {
02315       static const TileIndexDiffC heightdiff_area_by_dir[] = {
02316         /* Start */ {1, 0}, /* Dragging east */ {0, 0}, // Dragging south
02317         /* End   */ {0, 1}, /* Dragging east */ {1, 1}  // Dragging south
02318       };
02319 
02320       /* In the case of an area we can determine whether we were dragging south or
02321        * east by checking the X-coordinates of the tiles */
02322       byte style_t = (byte)(TileX(end_tile) > TileX(start_tile));
02323       start_tile = TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_area_by_dir[style_t]));
02324       end_tile   = TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_area_by_dir[2 + style_t]));
02325       /* FALL THROUGH */
02326     }
02327 
02328     case HT_POINT:
02329       h0 = TileHeight(start_tile);
02330       h1 = TileHeight(end_tile);
02331       break;
02332     default: { // All other types, this is mostly only line/autorail
02333       static const HighLightStyle flip_style_direction[] = {
02334         HT_DIR_X, HT_DIR_Y, HT_DIR_HL, HT_DIR_HU, HT_DIR_VR, HT_DIR_VL
02335       };
02336       static const TileIndexDiffC heightdiff_line_by_dir[] = {
02337         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_X  */ {0, 1}, {1, 1}, // HT_DIR_Y
02338         /* Start */ {1, 0}, {0, 0}, /* HT_DIR_HU */ {1, 0}, {1, 1}, // HT_DIR_HL
02339         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_VL */ {0, 1}, {1, 1}, // HT_DIR_VR
02340 
02341         /* Start */ {0, 1}, {0, 0}, /* HT_DIR_X  */ {1, 0}, {0, 0}, // HT_DIR_Y
02342         /* End   */ {0, 1}, {0, 0}, /* HT_DIR_HU */ {1, 1}, {0, 1}, // HT_DIR_HL
02343         /* End   */ {1, 0}, {0, 0}, /* HT_DIR_VL */ {0, 0}, {0, 1}, // HT_DIR_VR
02344       };
02345 
02346       distance %= 2; // we're only interested if the distance is even or uneven
02347       style &= HT_DIR_MASK;
02348 
02349       /* To handle autorail, we do some magic to be able to use a lookup table.
02350        * Firstly if we drag the other way around, we switch start&end, and if needed
02351        * also flip the drag-position. Eg if it was on the left, and the distance is even
02352        * that means the end, which is now the start is on the right */
02353       if (swap && distance == 0) style = flip_style_direction[style];
02354 
02355       /* Use lookup table for start-tile based on HighLightStyle direction */
02356       byte style_t = style * 2;
02357       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
02358       h0 = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t])));
02359       uint ht = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t + 1])));
02360       h0 = max(h0, ht);
02361 
02362       /* Use lookup table for end-tile based on HighLightStyle direction
02363        * flip around side (lower/upper, left/right) based on distance */
02364       if (distance == 0) style_t = flip_style_direction[style] * 2;
02365       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
02366       h1 = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t])));
02367       ht = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t + 1])));
02368       h1 = max(h1, ht);
02369       break;
02370     }
02371   }
02372 
02373   if (swap) Swap(h0, h1);
02374   return (int)(h1 - h0) * TILE_HEIGHT_STEP;
02375 }
02376 
02377 static const StringID measure_strings_length[] = {STR_NULL, STR_MEASURE_LENGTH, STR_MEASURE_LENGTH_HEIGHTDIFF};
02378 
02385 static void CheckUnderflow(int &test, int &other, int mult)
02386 {
02387   if (test >= 0) return;
02388 
02389   other += mult * test;
02390   test = 0;
02391 }
02392 
02400 static void CheckOverflow(int &test, int &other, int max, int mult)
02401 {
02402   if (test <= max) return;
02403 
02404   other += mult * (test - max);
02405   test = max;
02406 }
02407 
02409 static void CalcRaildirsDrawstyle(TileHighlightData *thd, int x, int y, int method)
02410 {
02411   HighLightStyle b;
02412 
02413   int dx = thd->selstart.x - (thd->selend.x & ~TILE_UNIT_MASK);
02414   int dy = thd->selstart.y - (thd->selend.y & ~TILE_UNIT_MASK);
02415   uint w = abs(dx) + TILE_SIZE;
02416   uint h = abs(dy) + TILE_SIZE;
02417 
02418   if (method & ~(VPM_RAILDIRS | VPM_SIGNALDIRS)) {
02419     /* We 'force' a selection direction; first four rail buttons. */
02420     method &= ~(VPM_RAILDIRS | VPM_SIGNALDIRS);
02421     int raw_dx = thd->selstart.x - thd->selend.x;
02422     int raw_dy = thd->selstart.y - thd->selend.y;
02423     switch (method) {
02424       case VPM_FIX_X:
02425         b = HT_LINE | HT_DIR_Y;
02426         x = thd->selstart.x;
02427         break;
02428 
02429       case VPM_FIX_Y:
02430         b = HT_LINE | HT_DIR_X;
02431         y = thd->selstart.y;
02432         break;
02433 
02434       case VPM_FIX_HORIZONTAL:
02435         if (dx == -dy) {
02436           /* We are on a straight horizontal line. Determine the 'rail'
02437            * to build based the sub tile location. */
02438           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
02439         } else {
02440           /* We are not on a straight line. Determine the rail to build
02441            * based on whether we are above or below it. */
02442           b = dx + dy >= (int)TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
02443 
02444           /* Calculate where a horizontal line through the start point and
02445            * a vertical line from the selected end point intersect and
02446            * use that point as the end point. */
02447           int offset = (raw_dx - raw_dy) / 2;
02448           x = thd->selstart.x - (offset & ~TILE_UNIT_MASK);
02449           y = thd->selstart.y + (offset & ~TILE_UNIT_MASK);
02450 
02451           /* 'Build' the last half rail tile if needed */
02452           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
02453             if (dx + dy >= (int)TILE_SIZE) {
02454               x += (dx + dy < 0) ? (int)TILE_SIZE : -(int)TILE_SIZE;
02455             } else {
02456               y += (dx + dy < 0) ? (int)TILE_SIZE : -(int)TILE_SIZE;
02457             }
02458           }
02459 
02460           /* Make sure we do not overflow the map! */
02461           CheckUnderflow(x, y, 1);
02462           CheckUnderflow(y, x, 1);
02463           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, 1);
02464           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, 1);
02465           assert(x >= 0 && y >= 0 && x <= (int)(MapMaxX() * TILE_SIZE) && y <= (int)(MapMaxY() * TILE_SIZE));
02466         }
02467         break;
02468 
02469       case VPM_FIX_VERTICAL:
02470         if (dx == dy) {
02471           /* We are on a straight vertical line. Determine the 'rail'
02472            * to build based the sub tile location. */
02473           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02474         } else {
02475           /* We are not on a straight line. Determine the rail to build
02476            * based on whether we are left or right from it. */
02477           b = dx < dy ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02478 
02479           /* Calculate where a vertical line through the start point and
02480            * a horizontal line from the selected end point intersect and
02481            * use that point as the end point. */
02482           int offset = (raw_dx + raw_dy + (int)TILE_SIZE) / 2;
02483           x = thd->selstart.x - (offset & ~TILE_UNIT_MASK);
02484           y = thd->selstart.y - (offset & ~TILE_UNIT_MASK);
02485 
02486           /* 'Build' the last half rail tile if needed */
02487           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
02488             if (dx - dy < 0) {
02489               y += (dx > dy) ? (int)TILE_SIZE : -(int)TILE_SIZE;
02490             } else {
02491               x += (dx < dy) ? (int)TILE_SIZE : -(int)TILE_SIZE;
02492             }
02493           }
02494 
02495           /* Make sure we do not overflow the map! */
02496           CheckUnderflow(x, y, -1);
02497           CheckUnderflow(y, x, -1);
02498           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, -1);
02499           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, -1);
02500           assert(x >= 0 && y >= 0 && x <= (int)(MapMaxX() * TILE_SIZE) && y <= (int)(MapMaxY() * TILE_SIZE));
02501         }
02502         break;
02503 
02504       default:
02505         NOT_REACHED();
02506     }
02507   } else if (TileVirtXY(thd->selstart.x, thd->selstart.y) == TileVirtXY(x, y)) { // check if we're only within one tile
02508     if (method & VPM_RAILDIRS) {
02509       b = GetAutorailHT(x, y);
02510     } else { // rect for autosignals on one tile
02511       b = HT_RECT;
02512     }
02513   } else if (h == TILE_SIZE) { // Is this in X direction?
02514     if (dx == (int)TILE_SIZE) { // 2x1 special handling
02515       b = (Check2x1AutoRail(3)) | HT_LINE;
02516     } else if (dx == -(int)TILE_SIZE) {
02517       b = (Check2x1AutoRail(2)) | HT_LINE;
02518     } else {
02519       b = HT_LINE | HT_DIR_X;
02520     }
02521     y = thd->selstart.y;
02522   } else if (w == TILE_SIZE) { // Or Y direction?
02523     if (dy == (int)TILE_SIZE) { // 2x1 special handling
02524       b = (Check2x1AutoRail(1)) | HT_LINE;
02525     } else if (dy == -(int)TILE_SIZE) { // 2x1 other direction
02526       b = (Check2x1AutoRail(0)) | HT_LINE;
02527     } else {
02528       b = HT_LINE | HT_DIR_Y;
02529     }
02530     x = thd->selstart.x;
02531   } else if (w > h * 2) { // still count as x dir?
02532     b = HT_LINE | HT_DIR_X;
02533     y = thd->selstart.y;
02534   } else if (h > w * 2) { // still count as y dir?
02535     b = HT_LINE | HT_DIR_Y;
02536     x = thd->selstart.x;
02537   } else { // complicated direction
02538     int d = w - h;
02539     thd->selend.x = thd->selend.x & ~TILE_UNIT_MASK;
02540     thd->selend.y = thd->selend.y & ~TILE_UNIT_MASK;
02541 
02542     /* four cases. */
02543     if (x > thd->selstart.x) {
02544       if (y > thd->selstart.y) {
02545         /* south */
02546         if (d == 0) {
02547           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02548         } else if (d >= 0) {
02549           x = thd->selstart.x + h;
02550           b = HT_LINE | HT_DIR_VL;
02551         } else {
02552           y = thd->selstart.y + w;
02553           b = HT_LINE | HT_DIR_VR;
02554         }
02555       } else {
02556         /* west */
02557         if (d == 0) {
02558           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
02559         } else if (d >= 0) {
02560           x = thd->selstart.x + h;
02561           b = HT_LINE | HT_DIR_HL;
02562         } else {
02563           y = thd->selstart.y - w;
02564           b = HT_LINE | HT_DIR_HU;
02565         }
02566       }
02567     } else {
02568       if (y > thd->selstart.y) {
02569         /* east */
02570         if (d == 0) {
02571           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
02572         } else if (d >= 0) {
02573           x = thd->selstart.x - h;
02574           b = HT_LINE | HT_DIR_HU;
02575         } else {
02576           y = thd->selstart.y + w;
02577           b = HT_LINE | HT_DIR_HL;
02578         }
02579       } else {
02580         /* north */
02581         if (d == 0) {
02582           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02583         } else if (d >= 0) {
02584           x = thd->selstart.x - h;
02585           b = HT_LINE | HT_DIR_VR;
02586         } else {
02587           y = thd->selstart.y - w;
02588           b = HT_LINE | HT_DIR_VL;
02589         }
02590       }
02591     }
02592   }
02593 
02594   if (_settings_client.gui.measure_tooltip) {
02595     TileIndex t0 = TileVirtXY(thd->selstart.x, thd->selstart.y);
02596     TileIndex t1 = TileVirtXY(x, y);
02597     uint distance = DistanceManhattan(t0, t1) + 1;
02598     byte index = 0;
02599     uint64 params[2];
02600 
02601     if (distance != 1) {
02602       int heightdiff = CalcHeightdiff(b, distance, t0, t1);
02603       /* If we are showing a tooltip for horizontal or vertical drags,
02604        * 2 tiles have a length of 1. To bias towards the ceiling we add
02605        * one before division. It feels more natural to count 3 lengths as 2 */
02606       if ((b & HT_DIR_MASK) != HT_DIR_X && (b & HT_DIR_MASK) != HT_DIR_Y) {
02607         distance = CeilDiv(distance, 2);
02608       }
02609 
02610       params[index++] = distance;
02611       if (heightdiff != 0) params[index++] = heightdiff;
02612     }
02613 
02614     ShowMeasurementTooltips(measure_strings_length[index], index, params);
02615   }
02616 
02617   thd->selend.x = x;
02618   thd->selend.y = y;
02619   thd->next_drawstyle = b;
02620 }
02621 
02629 void VpSelectTilesWithMethod(int x, int y, ViewportPlaceMethod method)
02630 {
02631   int sx, sy;
02632   HighLightStyle style;
02633 
02634   if (x == -1) {
02635     _thd.selend.x = -1;
02636     return;
02637   }
02638 
02639   /* Special handling of drag in any (8-way) direction */
02640   if (method & (VPM_RAILDIRS | VPM_SIGNALDIRS)) {
02641     _thd.selend.x = x;
02642     _thd.selend.y = y;
02643     CalcRaildirsDrawstyle(&_thd, x, y, method);
02644     return;
02645   }
02646 
02647   /* Needed so level-land is placed correctly */
02648   if ((_thd.next_drawstyle & HT_DRAG_MASK) == HT_POINT) {
02649     x += TILE_SIZE / 2;
02650     y += TILE_SIZE / 2;
02651   }
02652 
02653   sx = _thd.selstart.x;
02654   sy = _thd.selstart.y;
02655 
02656   int limit = 0;
02657 
02658   switch (method) {
02659     case VPM_X_OR_Y: // drag in X or Y direction
02660       if (abs(sy - y) < abs(sx - x)) {
02661         y = sy;
02662         style = HT_DIR_X;
02663       } else {
02664         x = sx;
02665         style = HT_DIR_Y;
02666       }
02667       goto calc_heightdiff_single_direction;
02668 
02669     case VPM_X_LIMITED: // Drag in X direction (limited size).
02670       limit = (_thd.sizelimit - 1) * TILE_SIZE;
02671       /* FALL THROUGH */
02672 
02673     case VPM_FIX_X: // drag in Y direction
02674       x = sx;
02675       style = HT_DIR_Y;
02676       goto calc_heightdiff_single_direction;
02677 
02678     case VPM_Y_LIMITED: // Drag in Y direction (limited size).
02679       limit = (_thd.sizelimit - 1) * TILE_SIZE;
02680       /* FALL THROUGH */
02681 
02682     case VPM_FIX_Y: // drag in X direction
02683       y = sy;
02684       style = HT_DIR_X;
02685 
02686 calc_heightdiff_single_direction:;
02687       if (limit > 0) {
02688         x = sx + Clamp(x - sx, -limit, limit);
02689         y = sy + Clamp(y - sy, -limit, limit);
02690       }
02691       if (_settings_client.gui.measure_tooltip) {
02692         TileIndex t0 = TileVirtXY(sx, sy);
02693         TileIndex t1 = TileVirtXY(x, y);
02694         uint distance = DistanceManhattan(t0, t1) + 1;
02695         byte index = 0;
02696         uint64 params[2];
02697 
02698         if (distance != 1) {
02699           /* With current code passing a HT_LINE style to calculate the height
02700            * difference is enough. However if/when a point-tool is created
02701            * with this method, function should be called with new_style (below)
02702            * instead of HT_LINE | style case HT_POINT is handled specially
02703            * new_style := (_thd.next_drawstyle & HT_RECT) ? HT_LINE | style : _thd.next_drawstyle; */
02704           int heightdiff = CalcHeightdiff(HT_LINE | style, 0, t0, t1);
02705 
02706           params[index++] = distance;
02707           if (heightdiff != 0) params[index++] = heightdiff;
02708         }
02709 
02710         ShowMeasurementTooltips(measure_strings_length[index], index, params);
02711       }
02712       break;
02713 
02714     case VPM_X_AND_Y_LIMITED: // Drag an X by Y constrained rect area.
02715       limit = (_thd.sizelimit - 1) * TILE_SIZE;
02716       x = sx + Clamp(x - sx, -limit, limit);
02717       y = sy + Clamp(y - sy, -limit, limit);
02718       /* FALL THROUGH */
02719 
02720     case VPM_X_AND_Y: // drag an X by Y area
02721       if (_settings_client.gui.measure_tooltip) {
02722         static const StringID measure_strings_area[] = {
02723           STR_NULL, STR_NULL, STR_MEASURE_AREA, STR_MEASURE_AREA_HEIGHTDIFF
02724         };
02725 
02726         TileIndex t0 = TileVirtXY(sx, sy);
02727         TileIndex t1 = TileVirtXY(x, y);
02728         uint dx = Delta(TileX(t0), TileX(t1)) + 1;
02729         uint dy = Delta(TileY(t0), TileY(t1)) + 1;
02730         byte index = 0;
02731         uint64 params[3];
02732 
02733         /* If dragging an area (eg dynamite tool) and it is actually a single
02734          * row/column, change the type to 'line' to get proper calculation for height */
02735         style = (HighLightStyle)_thd.next_drawstyle;
02736         if (_thd.IsDraggingDiagonal()) {
02737           /* Determine the "area" of the diagonal dragged selection.
02738            * We assume the area is the number of tiles along the X
02739            * edge and the number of tiles along the Y edge. However,
02740            * multiplying these two numbers does not give the exact
02741            * number of tiles; basically we are counting the black
02742            * squares on a chess board and ignore the white ones to
02743            * make the tile counts at the edges match up. There is no
02744            * other way to make a proper count though.
02745            *
02746            * First convert to the rotated coordinate system. */
02747           int dist_x = TileX(t0) - TileX(t1);
02748           int dist_y = TileY(t0) - TileY(t1);
02749           int a_max = dist_x + dist_y;
02750           int b_max = dist_y - dist_x;
02751 
02752           /* Now determine the size along the edge, but due to the
02753            * chess board principle this counts double. */
02754           a_max = abs(a_max + (a_max > 0 ? 2 : -2)) / 2;
02755           b_max = abs(b_max + (b_max > 0 ? 2 : -2)) / 2;
02756 
02757           /* We get a 1x1 on normal 2x1 rectangles, due to it being
02758            * a seen as two sides. As the result for actual building
02759            * will be the same as non-diagonal dragging revert to that
02760            * behaviour to give it a more normally looking size. */
02761           if (a_max != 1 || b_max != 1) {
02762             dx = a_max;
02763             dy = b_max;
02764           }
02765         } else if (style & HT_RECT) {
02766           if (dx == 1) {
02767             style = HT_LINE | HT_DIR_Y;
02768           } else if (dy == 1) {
02769             style = HT_LINE | HT_DIR_X;
02770           }
02771         }
02772 
02773         if (t0 != 1 || t1 != 1) {
02774           int heightdiff = CalcHeightdiff(style, 0, t0, t1);
02775 
02776           params[index++] = dx;
02777           params[index++] = dy;
02778           if (heightdiff != 0) params[index++] = heightdiff;
02779         }
02780 
02781         ShowMeasurementTooltips(measure_strings_area[index], index, params);
02782       }
02783       break;
02784 
02785     default: NOT_REACHED();
02786   }
02787 
02788   _thd.selend.x = x;
02789   _thd.selend.y = y;
02790 }
02791 
02796 EventState VpHandlePlaceSizingDrag()
02797 {
02798   if (_special_mouse_mode != WSM_SIZING) return ES_NOT_HANDLED;
02799 
02800   /* stop drag mode if the window has been closed */
02801   Window *w = FindWindowById(_thd.window_class, _thd.window_number);
02802   if (w == NULL) {
02803     ResetObjectToPlace();
02804     return ES_HANDLED;
02805   }
02806 
02807   /* while dragging execute the drag procedure of the corresponding window (mostly VpSelectTilesWithMethod() ) */
02808   if (_left_button_down) {
02809     w->OnPlaceDrag(_thd.select_method, _thd.select_proc, GetTileBelowCursor());
02810     return ES_HANDLED;
02811   }
02812 
02813   /* mouse button released..
02814    * keep the selected tool, but reset it to the original mode. */
02815   _special_mouse_mode = WSM_NONE;
02816   HighLightStyle others = _thd.next_drawstyle & ~HT_DRAG_MASK;
02817   if ((_thd.next_drawstyle & HT_DRAG_MASK) == HT_RECT) {
02818     _thd.place_mode = HT_RECT | others;
02819   } else if (_thd.select_method & VPM_SIGNALDIRS) {
02820     _thd.place_mode = HT_RECT | others;
02821   } else if (_thd.select_method & VPM_RAILDIRS) {
02822     _thd.place_mode = (_thd.select_method & ~VPM_RAILDIRS) ? _thd.next_drawstyle : (HT_RAIL | others);
02823   } else {
02824     _thd.place_mode = HT_POINT | others;
02825   }
02826   SetTileSelectSize(1, 1);
02827 
02828   w->OnPlaceMouseUp(_thd.select_method, _thd.select_proc, _thd.selend, TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y));
02829 
02830   return ES_HANDLED;
02831 }
02832 
02833 void SetObjectToPlaceWnd(CursorID icon, PaletteID pal, HighLightStyle mode, Window *w)
02834 {
02835   SetObjectToPlace(icon, pal, mode, w->window_class, w->window_number);
02836 }
02837 
02838 #include "table/animcursors.h"
02839 
02840 void SetObjectToPlace(CursorID icon, PaletteID pal, HighLightStyle mode, WindowClass window_class, WindowNumber window_num)
02841 {
02842   /* undo clicking on button and drag & drop */
02843   if (_thd.place_mode != HT_NONE || _special_mouse_mode == WSM_DRAGDROP) {
02844     Window *w = FindWindowById(_thd.window_class, _thd.window_number);
02845     if (w != NULL) {
02846       /* Call the abort function, but set the window class to something
02847        * that will never be used to avoid infinite loops. Setting it to
02848        * the 'next' window class must not be done because recursion into
02849        * this function might in some cases reset the newly set object to
02850        * place or not properly reset the original selection. */
02851       _thd.window_class = WC_INVALID;
02852       w->OnPlaceObjectAbort();
02853     }
02854   }
02855 
02856   SetTileSelectSize(1, 1);
02857 
02858   _thd.make_square_red = false;
02859 
02860   if (mode == HT_DRAG) { // HT_DRAG is for dragdropping trains in the depot window
02861     mode = HT_NONE;
02862     _special_mouse_mode = WSM_DRAGDROP;
02863   } else {
02864     _special_mouse_mode = WSM_NONE;
02865   }
02866 
02867   _thd.place_mode = mode;
02868   _thd.window_class = window_class;
02869   _thd.window_number = window_num;
02870 
02871   if (mode == HT_SPECIAL) { // special tools, like tunnels or docks start with presizing mode
02872     VpStartPreSizing();
02873   }
02874 
02875   if ((icon & ANIMCURSOR_FLAG) != 0) {
02876     SetAnimatedMouseCursor(_animcursors[icon & ~ANIMCURSOR_FLAG]);
02877   } else {
02878     SetMouseCursor(icon, pal);
02879   }
02880 
02881 }
02882 
02883 void ResetObjectToPlace()
02884 {
02885   SetObjectToPlace(SPR_CURSOR_MOUSE, PAL_NONE, HT_NONE, WC_MAIN_WINDOW, 0);
02886 }

Generated on Thu Dec 23 23:41:35 2010 for OpenTTD by  doxygen 1.6.1