viewport.cpp

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00001 /* $Id: viewport.cpp 22183 2011-03-04 19:04:42Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
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 
00049 #include "table/strings.h"
00050 
00051 Point _tile_fract_coords;
00052 
00053 struct StringSpriteToDraw {
00054   StringID string;
00055   Colours colour;
00056   int32 x;
00057   int32 y;
00058   uint64 params[2];
00059   uint16 width;
00060 };
00061 
00062 struct TileSpriteToDraw {
00063   SpriteID image;
00064   PaletteID pal;
00065   const SubSprite *sub;           
00066   int32 x;                        
00067   int32 y;                        
00068 };
00069 
00070 struct ChildScreenSpriteToDraw {
00071   SpriteID image;
00072   PaletteID pal;
00073   const SubSprite *sub;           
00074   int32 x;
00075   int32 y;
00076   int next;                       
00077 };
00078 
00080 struct ParentSpriteToDraw {
00081   SpriteID image;                 
00082   PaletteID pal;                  
00083   const SubSprite *sub;           
00084 
00085   int32 x;                        
00086   int32 y;                        
00087 
00088   int32 left;                     
00089   int32 top;                      
00090 
00091   int32 xmin;                     
00092   int32 xmax;                     
00093   int32 ymin;                     
00094   int32 ymax;                     
00095   int zmin;                       
00096   int zmax;                       
00097 
00098   int first_child;                
00099   bool comparison_done;           
00100 };
00101 
00103 enum FoundationPart {
00104   FOUNDATION_PART_NONE     = 0xFF,  
00105   FOUNDATION_PART_NORMAL   = 0,     
00106   FOUNDATION_PART_HALFTILE = 1,     
00107   FOUNDATION_PART_END
00108 };
00109 
00114 enum SpriteCombineMode {
00115   SPRITE_COMBINE_NONE,     
00116   SPRITE_COMBINE_PENDING,  
00117   SPRITE_COMBINE_ACTIVE,   
00118 };
00119 
00120 typedef SmallVector<TileSpriteToDraw, 64> TileSpriteToDrawVector;
00121 typedef SmallVector<StringSpriteToDraw, 4> StringSpriteToDrawVector;
00122 typedef SmallVector<ParentSpriteToDraw, 64> ParentSpriteToDrawVector;
00123 typedef SmallVector<ParentSpriteToDraw*, 64> ParentSpriteToSortVector;
00124 typedef SmallVector<ChildScreenSpriteToDraw, 16> ChildScreenSpriteToDrawVector;
00125 
00127 struct ViewportDrawer {
00128   DrawPixelInfo dpi;
00129 
00130   StringSpriteToDrawVector string_sprites_to_draw;
00131   TileSpriteToDrawVector tile_sprites_to_draw;
00132   ParentSpriteToDrawVector parent_sprites_to_draw;
00133   ParentSpriteToSortVector parent_sprites_to_sort; 
00134   ChildScreenSpriteToDrawVector child_screen_sprites_to_draw;
00135 
00136   int *last_child;
00137 
00138   SpriteCombineMode combine_sprites;               
00139 
00140   int foundation[FOUNDATION_PART_END];             
00141   FoundationPart foundation_part;                  
00142   int *last_foundation_child[FOUNDATION_PART_END]; 
00143   Point foundation_offset[FOUNDATION_PART_END];    
00144 };
00145 
00146 static ViewportDrawer _vd;
00147 
00148 TileHighlightData _thd;
00149 static TileInfo *_cur_ti;
00150 bool _draw_bounding_boxes = false;
00151 
00152 static Point MapXYZToViewport(const ViewPort *vp, int x, int y, int z)
00153 {
00154   Point p = RemapCoords(x, y, z);
00155   p.x -= vp->virtual_width / 2;
00156   p.y -= vp->virtual_height / 2;
00157   return p;
00158 }
00159 
00160 void DeleteWindowViewport(Window *w)
00161 {
00162   free(w->viewport);
00163   w->viewport = NULL;
00164 }
00165 
00178 void InitializeWindowViewport(Window *w, int x, int y,
00179   int width, int height, uint32 follow_flags, ZoomLevel zoom)
00180 {
00181   assert(w->viewport == NULL);
00182 
00183   ViewportData *vp = CallocT<ViewportData>(1);
00184 
00185   vp->left = x + w->left;
00186   vp->top = y + w->top;
00187   vp->width = width;
00188   vp->height = height;
00189 
00190   vp->zoom = zoom;
00191 
00192   vp->virtual_width = ScaleByZoom(width, zoom);
00193   vp->virtual_height = ScaleByZoom(height, zoom);
00194 
00195   Point pt;
00196 
00197   if (follow_flags & 0x80000000) {
00198     const Vehicle *veh;
00199 
00200     vp->follow_vehicle = (VehicleID)(follow_flags & 0xFFFFF);
00201     veh = Vehicle::Get(vp->follow_vehicle);
00202     pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
00203   } else {
00204     uint x = TileX(follow_flags) * TILE_SIZE;
00205     uint y = TileY(follow_flags) * TILE_SIZE;
00206 
00207     vp->follow_vehicle = INVALID_VEHICLE;
00208     pt = MapXYZToViewport(vp, x, y, GetSlopeZ(x, y));
00209   }
00210 
00211   vp->scrollpos_x = pt.x;
00212   vp->scrollpos_y = pt.y;
00213   vp->dest_scrollpos_x = pt.x;
00214   vp->dest_scrollpos_y = pt.y;
00215 
00216   w->viewport = vp;
00217   vp->virtual_left = 0;//pt.x;
00218   vp->virtual_top = 0;//pt.y;
00219 }
00220 
00221 static Point _vp_move_offs;
00222 
00223 static void DoSetViewportPosition(const Window *w, int left, int top, int width, int height)
00224 {
00225   FOR_ALL_WINDOWS_FROM_BACK_FROM(w, w) {
00226     if (left + width > w->left &&
00227         w->left + w->width > left &&
00228         top + height > w->top &&
00229         w->top + w->height > top) {
00230 
00231       if (left < w->left) {
00232         DoSetViewportPosition(w, left, top, w->left - left, height);
00233         DoSetViewportPosition(w, left + (w->left - left), top, width - (w->left - left), height);
00234         return;
00235       }
00236 
00237       if (left + width > w->left + w->width) {
00238         DoSetViewportPosition(w, left, top, (w->left + w->width - left), height);
00239         DoSetViewportPosition(w, left + (w->left + w->width - left), top, width - (w->left + w->width - left), height);
00240         return;
00241       }
00242 
00243       if (top < w->top) {
00244         DoSetViewportPosition(w, left, top, width, (w->top - top));
00245         DoSetViewportPosition(w, left, top + (w->top - top), width, height - (w->top - top));
00246         return;
00247       }
00248 
00249       if (top + height > w->top + w->height) {
00250         DoSetViewportPosition(w, left, top, width, (w->top + w->height - top));
00251         DoSetViewportPosition(w, left, top + (w->top + w->height - top), width, height - (w->top + w->height - top));
00252         return;
00253       }
00254 
00255       return;
00256     }
00257   }
00258 
00259   {
00260     int xo = _vp_move_offs.x;
00261     int yo = _vp_move_offs.y;
00262 
00263     if (abs(xo) >= width || abs(yo) >= height) {
00264       /* fully_outside */
00265       RedrawScreenRect(left, top, left + width, top + height);
00266       return;
00267     }
00268 
00269     GfxScroll(left, top, width, height, xo, yo);
00270 
00271     if (xo > 0) {
00272       RedrawScreenRect(left, top, xo + left, top + height);
00273       left += xo;
00274       width -= xo;
00275     } else if (xo < 0) {
00276       RedrawScreenRect(left + width + xo, top, left + width, top + height);
00277       width += xo;
00278     }
00279 
00280     if (yo > 0) {
00281       RedrawScreenRect(left, top, width + left, top + yo);
00282     } else if (yo < 0) {
00283       RedrawScreenRect(left, top + height + yo, width + left, top + height);
00284     }
00285   }
00286 }
00287 
00288 static void SetViewportPosition(Window *w, int x, int y)
00289 {
00290   ViewPort *vp = w->viewport;
00291   int old_left = vp->virtual_left;
00292   int old_top = vp->virtual_top;
00293   int i;
00294   int left, top, width, height;
00295 
00296   vp->virtual_left = x;
00297   vp->virtual_top = y;
00298 
00299   /* Viewport is bound to its left top corner, so it must be rounded down (UnScaleByZoomLower)
00300    * else glitch described in FS#1412 will happen (offset by 1 pixel with zoom level > NORMAL)
00301    */
00302   old_left = UnScaleByZoomLower(old_left, vp->zoom);
00303   old_top = UnScaleByZoomLower(old_top, vp->zoom);
00304   x = UnScaleByZoomLower(x, vp->zoom);
00305   y = UnScaleByZoomLower(y, vp->zoom);
00306 
00307   old_left -= x;
00308   old_top -= y;
00309 
00310   if (old_top == 0 && old_left == 0) return;
00311 
00312   _vp_move_offs.x = old_left;
00313   _vp_move_offs.y = old_top;
00314 
00315   left = vp->left;
00316   top = vp->top;
00317   width = vp->width;
00318   height = vp->height;
00319 
00320   if (left < 0) {
00321     width += left;
00322     left = 0;
00323   }
00324 
00325   i = left + width - _screen.width;
00326   if (i >= 0) width -= i;
00327 
00328   if (width > 0) {
00329     if (top < 0) {
00330       height += top;
00331       top = 0;
00332     }
00333 
00334     i = top + height - _screen.height;
00335     if (i >= 0) height -= i;
00336 
00337     if (height > 0) DoSetViewportPosition(w->z_front, left, top, width, height);
00338   }
00339 }
00340 
00349 ViewPort *IsPtInWindowViewport(const Window *w, int x, int y)
00350 {
00351   ViewPort *vp = w->viewport;
00352 
00353   if (vp != NULL &&
00354       IsInsideMM(x, vp->left, vp->left + vp->width) &&
00355       IsInsideMM(y, vp->top, vp->top + vp->height))
00356     return vp;
00357 
00358   return NULL;
00359 }
00360 
00368 static Point TranslateXYToTileCoord(const ViewPort *vp, int x, int y)
00369 {
00370   Point pt;
00371   int a, b;
00372   uint z;
00373 
00374   if ( (uint)(x -= vp->left) >= (uint)vp->width ||
00375         (uint)(y -= vp->top) >= (uint)vp->height) {
00376         Point pt = {-1, -1};
00377         return pt;
00378   }
00379 
00380   x = (ScaleByZoom(x, vp->zoom) + vp->virtual_left) >> 2;
00381   y = (ScaleByZoom(y, vp->zoom) + vp->virtual_top) >> 1;
00382 
00383   a = y - x;
00384   b = y + x;
00385 
00386   /* we need to move variables in to the valid range, as the
00387    * GetTileZoomCenterWindow() function can call here with invalid x and/or y,
00388    * when the user tries to zoom out along the sides of the map */
00389   a = Clamp(a, -4 * (int)TILE_SIZE, (int)(MapMaxX() * TILE_SIZE) - 1);
00390   b = Clamp(b, -4 * (int)TILE_SIZE, (int)(MapMaxY() * TILE_SIZE) - 1);
00391 
00392   /* (a, b) is the X/Y-world coordinate that belongs to (x,y) if the landscape would be completely flat on height 0.
00393    * Now find the Z-world coordinate by fix point iteration.
00394    * This is a bit tricky because the tile height is non-continuous at foundations.
00395    * The clicked point should be approached from the back, otherwise there are regions that are not clickable.
00396    * (FOUNDATION_HALFTILE_LOWER on SLOPE_STEEP_S hides north halftile completely)
00397    * So give it a z-malus of 4 in the first iterations.
00398    */
00399   z = 0;
00400 
00401   int min_coord = _settings_game.construction.freeform_edges ? TILE_SIZE : 0;
00402 
00403   for (int i = 0; i < 5; i++) z = GetSlopeZ(Clamp(a + (int)max(z, 4u) - 4, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + (int)max(z, 4u) - 4, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
00404   for (uint malus = 3; malus > 0; malus--) z = GetSlopeZ(Clamp(a + (int)max(z, malus) - (int)malus, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + (int)max(z, malus) - (int)malus, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
00405   for (int i = 0; i < 5; i++) z = GetSlopeZ(Clamp(a + (int)z, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + (int)z, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
00406 
00407   pt.x = Clamp(a + (int)z, min_coord, MapMaxX() * TILE_SIZE - 1);
00408   pt.y = Clamp(b + (int)z, min_coord, MapMaxY() * TILE_SIZE - 1);
00409 
00410   return pt;
00411 }
00412 
00413 /* When used for zooming, check area below current coordinates (x,y)
00414  * and return the tile of the zoomed out/in position (zoom_x, zoom_y)
00415  * when you just want the tile, make x = zoom_x and y = zoom_y */
00416 static Point GetTileFromScreenXY(int x, int y, int zoom_x, int zoom_y)
00417 {
00418   Window *w;
00419   ViewPort *vp;
00420   Point pt;
00421 
00422   if ( (w = FindWindowFromPt(x, y)) != NULL &&
00423        (vp = IsPtInWindowViewport(w, x, y)) != NULL)
00424         return TranslateXYToTileCoord(vp, zoom_x, zoom_y);
00425 
00426   pt.y = pt.x = -1;
00427   return pt;
00428 }
00429 
00430 Point GetTileBelowCursor()
00431 {
00432   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, _cursor.pos.x, _cursor.pos.y);
00433 }
00434 
00435 
00436 Point GetTileZoomCenterWindow(bool in, Window * w)
00437 {
00438   int x, y;
00439   ViewPort *vp = w->viewport;
00440 
00441   if (in) {
00442     x = ((_cursor.pos.x - vp->left) >> 1) + (vp->width >> 2);
00443     y = ((_cursor.pos.y - vp->top) >> 1) + (vp->height >> 2);
00444   } else {
00445     x = vp->width - (_cursor.pos.x - vp->left);
00446     y = vp->height - (_cursor.pos.y - vp->top);
00447   }
00448   /* Get the tile below the cursor and center on the zoomed-out center */
00449   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, x + vp->left, y + vp->top);
00450 }
00451 
00460 void HandleZoomMessage(Window *w, const ViewPort *vp, byte widget_zoom_in, byte widget_zoom_out)
00461 {
00462   w->SetWidgetDisabledState(widget_zoom_in, vp->zoom == ZOOM_LVL_MIN);
00463   w->SetWidgetDirty(widget_zoom_in);
00464 
00465   w->SetWidgetDisabledState(widget_zoom_out, vp->zoom == ZOOM_LVL_MAX);
00466   w->SetWidgetDirty(widget_zoom_out);
00467 }
00468 
00481 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)
00482 {
00483   assert((image & SPRITE_MASK) < MAX_SPRITES);
00484 
00485   TileSpriteToDraw *ts = _vd.tile_sprites_to_draw.Append();
00486   ts->image = image;
00487   ts->pal = pal;
00488   ts->sub = sub;
00489   Point pt = RemapCoords(x, y, z);
00490   ts->x = pt.x + extra_offs_x;
00491   ts->y = pt.y + extra_offs_y;
00492 }
00493 
00506 static void AddChildSpriteToFoundation(SpriteID image, PaletteID pal, const SubSprite *sub, FoundationPart foundation_part, int extra_offs_x, int extra_offs_y)
00507 {
00508   assert(IsInsideMM(foundation_part, 0, FOUNDATION_PART_END));
00509   assert(_vd.foundation[foundation_part] != -1);
00510   Point offs = _vd.foundation_offset[foundation_part];
00511 
00512   /* Change the active ChildSprite list to the one of the foundation */
00513   int *old_child = _vd.last_child;
00514   _vd.last_child = _vd.last_foundation_child[foundation_part];
00515 
00516   AddChildSpriteScreen(image, pal, offs.x + extra_offs_x, offs.y + extra_offs_y, false, sub);
00517 
00518   /* Switch back to last ChildSprite list */
00519   _vd.last_child = old_child;
00520 }
00521 
00535 void DrawGroundSpriteAt(SpriteID image, PaletteID pal, int32 x, int32 y, int z, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
00536 {
00537   /* Switch to first foundation part, if no foundation was drawn */
00538   if (_vd.foundation_part == FOUNDATION_PART_NONE) _vd.foundation_part = FOUNDATION_PART_NORMAL;
00539 
00540   if (_vd.foundation[_vd.foundation_part] != -1) {
00541     Point pt = RemapCoords(x, y, z);
00542     AddChildSpriteToFoundation(image, pal, sub, _vd.foundation_part, pt.x + extra_offs_x, pt.y + extra_offs_y);
00543   } else {
00544     AddTileSpriteToDraw(image, pal, _cur_ti->x + x, _cur_ti->y + y, _cur_ti->z + z, sub, extra_offs_x, extra_offs_y);
00545   }
00546 }
00547 
00558 void DrawGroundSprite(SpriteID image, PaletteID pal, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
00559 {
00560   DrawGroundSpriteAt(image, pal, 0, 0, 0, sub, extra_offs_x, extra_offs_y);
00561 }
00562 
00570 void OffsetGroundSprite(int x, int y)
00571 {
00572   /* Switch to next foundation part */
00573   switch (_vd.foundation_part) {
00574     case FOUNDATION_PART_NONE:
00575       _vd.foundation_part = FOUNDATION_PART_NORMAL;
00576       break;
00577     case FOUNDATION_PART_NORMAL:
00578       _vd.foundation_part = FOUNDATION_PART_HALFTILE;
00579       break;
00580     default: NOT_REACHED();
00581   }
00582 
00583   /* _vd.last_child == NULL if foundation sprite was clipped by the viewport bounds */
00584   if (_vd.last_child != NULL) _vd.foundation[_vd.foundation_part] = _vd.parent_sprites_to_draw.Length() - 1;
00585 
00586   _vd.foundation_offset[_vd.foundation_part].x = x;
00587   _vd.foundation_offset[_vd.foundation_part].y = y;
00588   _vd.last_foundation_child[_vd.foundation_part] = _vd.last_child;
00589 }
00590 
00602 static void AddCombinedSprite(SpriteID image, PaletteID pal, int x, int y, byte z, const SubSprite *sub)
00603 {
00604   Point pt = RemapCoords(x, y, z);
00605   const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
00606 
00607   if (pt.x + spr->x_offs >= _vd.dpi.left + _vd.dpi.width ||
00608       pt.x + spr->x_offs + spr->width <= _vd.dpi.left ||
00609       pt.y + spr->y_offs >= _vd.dpi.top + _vd.dpi.height ||
00610       pt.y + spr->y_offs + spr->height <= _vd.dpi.top)
00611     return;
00612 
00613   const ParentSpriteToDraw *pstd = _vd.parent_sprites_to_draw.End() - 1;
00614   AddChildSpriteScreen(image, pal, pt.x - pstd->left, pt.y - pstd->top, false, sub);
00615 }
00616 
00642 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)
00643 {
00644   int32 left, right, top, bottom;
00645 
00646   assert((image & SPRITE_MASK) < MAX_SPRITES);
00647 
00648   /* make the sprites transparent with the right palette */
00649   if (transparent) {
00650     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
00651     pal = PALETTE_TO_TRANSPARENT;
00652   }
00653 
00654   if (_vd.combine_sprites == SPRITE_COMBINE_ACTIVE) {
00655     AddCombinedSprite(image, pal, x, y, z, sub);
00656     return;
00657   }
00658 
00659   _vd.last_child = NULL;
00660 
00661   Point pt = RemapCoords(x, y, z);
00662   int tmp_left, tmp_top, tmp_x = pt.x, tmp_y = pt.y;
00663 
00664   /* Compute screen extents of sprite */
00665   if (image == SPR_EMPTY_BOUNDING_BOX) {
00666     left = tmp_left = RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x;
00667     right           = RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1;
00668     top  = tmp_top  = RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y;
00669     bottom          = RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1;
00670   } else {
00671     const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
00672     left = tmp_left = (pt.x += spr->x_offs);
00673     right           = (pt.x +  spr->width );
00674     top  = tmp_top  = (pt.y += spr->y_offs);
00675     bottom          = (pt.y +  spr->height);
00676   }
00677 
00678   if (_draw_bounding_boxes && (image != SPR_EMPTY_BOUNDING_BOX)) {
00679     /* Compute maximal extents of sprite and its bounding box */
00680     left   = min(left  , RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x);
00681     right  = max(right , RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1);
00682     top    = min(top   , RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y);
00683     bottom = max(bottom, RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1);
00684   }
00685 
00686   /* Do not add the sprite to the viewport, if it is outside */
00687   if (left   >= _vd.dpi.left + _vd.dpi.width ||
00688       right  <= _vd.dpi.left                 ||
00689       top    >= _vd.dpi.top + _vd.dpi.height ||
00690       bottom <= _vd.dpi.top) {
00691     return;
00692   }
00693 
00694   ParentSpriteToDraw *ps = _vd.parent_sprites_to_draw.Append();
00695   ps->x = tmp_x;
00696   ps->y = tmp_y;
00697 
00698   ps->left = tmp_left;
00699   ps->top  = tmp_top;
00700 
00701   ps->image = image;
00702   ps->pal = pal;
00703   ps->sub = sub;
00704   ps->xmin = x + bb_offset_x;
00705   ps->xmax = x + max(bb_offset_x, w) - 1;
00706 
00707   ps->ymin = y + bb_offset_y;
00708   ps->ymax = y + max(bb_offset_y, h) - 1;
00709 
00710   ps->zmin = z + bb_offset_z;
00711   ps->zmax = z + max(bb_offset_z, dz) - 1;
00712 
00713   ps->comparison_done = false;
00714   ps->first_child = -1;
00715 
00716   _vd.last_child = &ps->first_child;
00717 
00718   if (_vd.combine_sprites == SPRITE_COMBINE_PENDING) _vd.combine_sprites = SPRITE_COMBINE_ACTIVE;
00719 }
00720 
00739 void StartSpriteCombine()
00740 {
00741   assert(_vd.combine_sprites == SPRITE_COMBINE_NONE);
00742   _vd.combine_sprites = SPRITE_COMBINE_PENDING;
00743 }
00744 
00749 void EndSpriteCombine()
00750 {
00751   assert(_vd.combine_sprites != SPRITE_COMBINE_NONE);
00752   _vd.combine_sprites = SPRITE_COMBINE_NONE;
00753 }
00754 
00764 static bool IsInRangeInclusive(int begin, int end, int check)
00765 {
00766   if (begin > end) Swap(begin, end);
00767   return begin <= check && check <= end;
00768 }
00769 
00776 bool IsInsideRotatedRectangle(int x, int y)
00777 {
00778   int dist_a = (_thd.size.x + _thd.size.y);      // Rotated coordinate system for selected rectangle.
00779   int dist_b = (_thd.size.x - _thd.size.y);      // We don't have to divide by 2. It's all relative!
00780   int a = ((x - _thd.pos.x) + (y - _thd.pos.y)); // Rotated coordinate system for the point under scrutiny.
00781   int b = ((x - _thd.pos.x) - (y - _thd.pos.y));
00782 
00783   /* Check if a and b are between 0 and dist_a or dist_b respectively. */
00784   return IsInRangeInclusive(dist_a, 0, a) && IsInRangeInclusive(dist_b, 0, b);
00785 }
00786 
00797 void AddChildSpriteScreen(SpriteID image, PaletteID pal, int x, int y, bool transparent, const SubSprite *sub)
00798 {
00799   assert((image & SPRITE_MASK) < MAX_SPRITES);
00800 
00801   /* If the ParentSprite was clipped by the viewport bounds, do not draw the ChildSprites either */
00802   if (_vd.last_child == NULL) return;
00803 
00804   /* make the sprites transparent with the right palette */
00805   if (transparent) {
00806     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
00807     pal = PALETTE_TO_TRANSPARENT;
00808   }
00809 
00810   *_vd.last_child = _vd.child_screen_sprites_to_draw.Length();
00811 
00812   ChildScreenSpriteToDraw *cs = _vd.child_screen_sprites_to_draw.Append();
00813   cs->image = image;
00814   cs->pal = pal;
00815   cs->sub = sub;
00816   cs->x = x;
00817   cs->y = y;
00818   cs->next = -1;
00819 
00820   /* Append the sprite to the active ChildSprite list.
00821    * If the active ParentSprite is a foundation, update last_foundation_child as well.
00822    * Note: ChildSprites of foundations are NOT sequential in the vector, as selection sprites are added at last. */
00823   if (_vd.last_foundation_child[0] == _vd.last_child) _vd.last_foundation_child[0] = &cs->next;
00824   if (_vd.last_foundation_child[1] == _vd.last_child) _vd.last_foundation_child[1] = &cs->next;
00825   _vd.last_child = &cs->next;
00826 }
00827 
00828 static void AddStringToDraw(int x, int y, StringID string, uint64 params_1, uint64 params_2, Colours colour, uint16 width)
00829 {
00830   assert(width != 0);
00831   StringSpriteToDraw *ss = _vd.string_sprites_to_draw.Append();
00832   ss->string = string;
00833   ss->x = x;
00834   ss->y = y;
00835   ss->params[0] = params_1;
00836   ss->params[1] = params_2;
00837   ss->width = width;
00838   ss->colour = colour;
00839 }
00840 
00841 
00853 static void DrawSelectionSprite(SpriteID image, PaletteID pal, const TileInfo *ti, int z_offset, FoundationPart foundation_part)
00854 {
00855   /* FIXME: This is not totally valid for some autorail highlights that extend over the edges of the tile. */
00856   if (_vd.foundation[foundation_part] == -1) {
00857     /* draw on real ground */
00858     AddTileSpriteToDraw(image, pal, ti->x, ti->y, ti->z + z_offset);
00859   } else {
00860     /* draw on top of foundation */
00861     AddChildSpriteToFoundation(image, pal, NULL, foundation_part, 0, -z_offset);
00862   }
00863 }
00864 
00871 static void DrawTileSelectionRect(const TileInfo *ti, PaletteID pal)
00872 {
00873   if (!IsValidTile(ti->tile)) return;
00874 
00875   SpriteID sel;
00876   if (IsHalftileSlope(ti->tileh)) {
00877     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
00878     SpriteID sel2 = SPR_HALFTILE_SELECTION_FLAT + halftile_corner;
00879     DrawSelectionSprite(sel2, pal, ti, 7 + TILE_HEIGHT, FOUNDATION_PART_HALFTILE);
00880 
00881     Corner opposite_corner = OppositeCorner(halftile_corner);
00882     if (IsSteepSlope(ti->tileh)) {
00883       sel = SPR_HALFTILE_SELECTION_DOWN;
00884     } else {
00885       sel = ((ti->tileh & SlopeWithOneCornerRaised(opposite_corner)) != 0 ? SPR_HALFTILE_SELECTION_UP : SPR_HALFTILE_SELECTION_FLAT);
00886     }
00887     sel += opposite_corner;
00888   } else {
00889     sel = SPR_SELECT_TILE + SlopeToSpriteOffset(ti->tileh);
00890   }
00891   DrawSelectionSprite(sel, pal, ti, 7, FOUNDATION_PART_NORMAL);
00892 }
00893 
00894 static bool IsPartOfAutoLine(int px, int py)
00895 {
00896   px -= _thd.selstart.x;
00897   py -= _thd.selstart.y;
00898 
00899   if ((_thd.drawstyle & HT_DRAG_MASK) != HT_LINE) return false;
00900 
00901   switch (_thd.drawstyle & HT_DIR_MASK) {
00902     case HT_DIR_X:  return py == 0; // x direction
00903     case HT_DIR_Y:  return px == 0; // y direction
00904     case HT_DIR_HU: return px == -py || px == -py - 16; // horizontal upper
00905     case HT_DIR_HL: return px == -py || px == -py + 16; // horizontal lower
00906     case HT_DIR_VL: return px == py || px == py + 16; // vertical left
00907     case HT_DIR_VR: return px == py || px == py - 16; // vertical right
00908     default:
00909       NOT_REACHED();
00910   }
00911 }
00912 
00913 /* [direction][side] */
00914 static const HighLightStyle _autorail_type[6][2] = {
00915   { HT_DIR_X,  HT_DIR_X },
00916   { HT_DIR_Y,  HT_DIR_Y },
00917   { HT_DIR_HU, HT_DIR_HL },
00918   { HT_DIR_HL, HT_DIR_HU },
00919   { HT_DIR_VL, HT_DIR_VR },
00920   { HT_DIR_VR, HT_DIR_VL }
00921 };
00922 
00923 #include "table/autorail.h"
00924 
00931 static void DrawAutorailSelection(const TileInfo *ti, uint autorail_type)
00932 {
00933   SpriteID image;
00934   PaletteID pal;
00935   int offset;
00936 
00937   FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
00938   Slope autorail_tileh = RemoveHalftileSlope(ti->tileh);
00939   if (IsHalftileSlope(ti->tileh)) {
00940     static const uint _lower_rail[4] = { 5U, 2U, 4U, 3U };
00941     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
00942     if (autorail_type != _lower_rail[halftile_corner]) {
00943       foundation_part = FOUNDATION_PART_HALFTILE;
00944       /* Here we draw the highlights of the "three-corners-raised"-slope. That looks ok to me. */
00945       autorail_tileh = SlopeWithThreeCornersRaised(OppositeCorner(halftile_corner));
00946     }
00947   }
00948 
00949   offset = _AutorailTilehSprite[autorail_tileh][autorail_type];
00950   if (offset >= 0) {
00951     image = SPR_AUTORAIL_BASE + offset;
00952     pal = PAL_NONE;
00953   } else {
00954     image = SPR_AUTORAIL_BASE - offset;
00955     pal = PALETTE_SEL_TILE_RED;
00956   }
00957 
00958   DrawSelectionSprite(image, _thd.make_square_red ? PALETTE_SEL_TILE_RED : pal, ti, 7, foundation_part);
00959 }
00960 
00965 static void DrawTileSelection(const TileInfo *ti)
00966 {
00967   /* Draw a red error square? */
00968   bool is_redsq = _thd.redsq == ti->tile;
00969   if (is_redsq) DrawTileSelectionRect(ti, PALETTE_TILE_RED_PULSATING);
00970 
00971   /* No tile selection active? */
00972   if ((_thd.drawstyle & HT_DRAG_MASK) == HT_NONE) return;
00973 
00974   if (_thd.diagonal) { // We're drawing a 45 degrees rotated (diagonal) rectangle
00975     if (IsInsideRotatedRectangle((int)ti->x, (int)ti->y)) goto draw_inner;
00976     return;
00977   }
00978 
00979   /* Inside the inner area? */
00980   if (IsInsideBS(ti->x, _thd.pos.x, _thd.size.x) &&
00981       IsInsideBS(ti->y, _thd.pos.y, _thd.size.y)) {
00982 draw_inner:
00983     if (_thd.drawstyle & HT_RECT) {
00984       if (!is_redsq) DrawTileSelectionRect(ti, _thd.make_square_red ? PALETTE_SEL_TILE_RED : PAL_NONE);
00985     } else if (_thd.drawstyle & HT_POINT) {
00986       /* Figure out the Z coordinate for the single dot. */
00987       byte z = 0;
00988       FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
00989       if (ti->tileh & SLOPE_N) {
00990         z += TILE_HEIGHT;
00991         if (RemoveHalftileSlope(ti->tileh) == SLOPE_STEEP_N) z += TILE_HEIGHT;
00992       }
00993       if (IsHalftileSlope(ti->tileh)) {
00994         Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
00995         if ((halftile_corner == CORNER_W) || (halftile_corner == CORNER_E)) z += TILE_HEIGHT;
00996         if (halftile_corner != CORNER_S) {
00997           foundation_part = FOUNDATION_PART_HALFTILE;
00998           if (IsSteepSlope(ti->tileh)) z -= TILE_HEIGHT;
00999         }
01000       }
01001       DrawSelectionSprite(_cur_dpi->zoom <= ZOOM_LVL_DETAIL ? SPR_DOT : SPR_DOT_SMALL, PAL_NONE, ti, z, foundation_part);
01002     } else if (_thd.drawstyle & HT_RAIL) {
01003       /* autorail highlight piece under cursor */
01004       HighLightStyle type = _thd.drawstyle & HT_DIR_MASK;
01005       assert(type < HT_DIR_END);
01006       DrawAutorailSelection(ti, _autorail_type[type][0]);
01007     } else if (IsPartOfAutoLine(ti->x, ti->y)) {
01008       /* autorail highlighting long line */
01009       HighLightStyle dir = _thd.drawstyle & HT_DIR_MASK;
01010       uint side;
01011 
01012       if (dir == HT_DIR_X || dir == HT_DIR_Y) {
01013         side = 0;
01014       } else {
01015         TileIndex start = TileVirtXY(_thd.selstart.x, _thd.selstart.y);
01016         side = Delta(Delta(TileX(start), TileX(ti->tile)), Delta(TileY(start), TileY(ti->tile)));
01017       }
01018 
01019       DrawAutorailSelection(ti, _autorail_type[dir][side]);
01020     }
01021     return;
01022   }
01023 
01024   /* Check if it's inside the outer area? */
01025   if (!is_redsq && _thd.outersize.x > 0 &&
01026       IsInsideBS(ti->x, _thd.pos.x + _thd.offs.x, _thd.size.x + _thd.outersize.x) &&
01027       IsInsideBS(ti->y, _thd.pos.y + _thd.offs.y, _thd.size.y + _thd.outersize.y)) {
01028     /* Draw a blue rect. */
01029     DrawTileSelectionRect(ti, PALETTE_SEL_TILE_BLUE);
01030     return;
01031   }
01032 }
01033 
01034 static void ViewportAddLandscape()
01035 {
01036   int x, y, width, height;
01037   TileInfo ti;
01038   bool direction;
01039 
01040   _cur_ti = &ti;
01041 
01042   /* Transform into tile coordinates and round to closest full tile */
01043   x = ((_vd.dpi.top >> 1) - (_vd.dpi.left >> 2)) & ~TILE_UNIT_MASK;
01044   y = ((_vd.dpi.top >> 1) + (_vd.dpi.left >> 2) - TILE_SIZE) & ~TILE_UNIT_MASK;
01045 
01046   /* determine size of area */
01047   {
01048     Point pt = RemapCoords(x, y, 241);
01049     width = (_vd.dpi.left + _vd.dpi.width - pt.x + 95) >> 6;
01050     height = (_vd.dpi.top + _vd.dpi.height - pt.y) >> 5 << 1;
01051   }
01052 
01053   assert(width > 0);
01054   assert(height > 0);
01055 
01056   direction = false;
01057 
01058   do {
01059     int width_cur = width;
01060     uint x_cur = x;
01061     uint y_cur = y;
01062 
01063     do {
01064       TileType tt = MP_VOID;
01065 
01066       ti.x = x_cur;
01067       ti.y = y_cur;
01068 
01069       ti.z = 0;
01070 
01071       ti.tileh = SLOPE_FLAT;
01072       ti.tile = INVALID_TILE;
01073 
01074       if (x_cur < MapMaxX() * TILE_SIZE &&
01075           y_cur < MapMaxY() * TILE_SIZE) {
01076         TileIndex tile = TileVirtXY(x_cur, y_cur);
01077 
01078         if (!_settings_game.construction.freeform_edges || (TileX(tile) != 0 && TileY(tile) != 0)) {
01079           if (x_cur == ((int)MapMaxX() - 1) * TILE_SIZE || y_cur == ((int)MapMaxY() - 1) * TILE_SIZE) {
01080             uint maxh = max<uint>(TileHeight(tile), 1);
01081             for (uint h = 0; h < maxh; h++) {
01082               AddTileSpriteToDraw(SPR_SHADOW_CELL, PAL_NONE, ti.x, ti.y, h * TILE_HEIGHT);
01083             }
01084           }
01085 
01086           ti.tile = tile;
01087           ti.tileh = GetTileSlope(tile, &ti.z);
01088           tt = GetTileType(tile);
01089         }
01090       }
01091 
01092       _vd.foundation_part = FOUNDATION_PART_NONE;
01093       _vd.foundation[0] = -1;
01094       _vd.foundation[1] = -1;
01095       _vd.last_foundation_child[0] = NULL;
01096       _vd.last_foundation_child[1] = NULL;
01097 
01098       _tile_type_procs[tt]->draw_tile_proc(&ti);
01099 
01100       if ((x_cur == (int)MapMaxX() * TILE_SIZE && IsInsideMM(y_cur, 0, MapMaxY() * TILE_SIZE + 1)) ||
01101           (y_cur == (int)MapMaxY() * TILE_SIZE && IsInsideMM(x_cur, 0, MapMaxX() * TILE_SIZE + 1))) {
01102         TileIndex tile = TileVirtXY(x_cur, y_cur);
01103         ti.tile = tile;
01104         ti.tileh = GetTileSlope(tile, &ti.z);
01105         tt = GetTileType(tile);
01106       }
01107       if (ti.tile != INVALID_TILE) DrawTileSelection(&ti);
01108 
01109       y_cur += 0x10;
01110       x_cur -= 0x10;
01111     } while (--width_cur);
01112 
01113     if ((direction ^= 1) != 0) {
01114       y += 0x10;
01115     } else {
01116       x += 0x10;
01117     }
01118   } while (--height);
01119 }
01120 
01131 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)
01132 {
01133   bool small = dpi->zoom >= small_from;
01134 
01135   int left   = dpi->left;
01136   int top    = dpi->top;
01137   int right  = left + dpi->width;
01138   int bottom = top + dpi->height;
01139 
01140   int sign_height     = ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM, dpi->zoom);
01141   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, dpi->zoom);
01142 
01143   if (bottom < sign->top ||
01144       top   > sign->top + sign_height ||
01145       right < sign->center - sign_half_width ||
01146       left  > sign->center + sign_half_width) {
01147     return;
01148   }
01149 
01150   if (!small) {
01151     AddStringToDraw(sign->center - sign_half_width, sign->top, string_normal, params_1, params_2, colour, sign->width_normal);
01152   } else {
01153     int shadow_offset = 0;
01154     if (string_small_shadow != STR_NULL) {
01155       shadow_offset = 4;
01156       AddStringToDraw(sign->center - sign_half_width + shadow_offset, sign->top, string_small_shadow, params_1, params_2, INVALID_COLOUR, sign->width_small);
01157     }
01158     AddStringToDraw(sign->center - sign_half_width, sign->top - shadow_offset, string_small, params_1, params_2,
01159         colour, sign->width_small | 0x8000);
01160   }
01161 }
01162 
01163 static void ViewportAddTownNames(DrawPixelInfo *dpi)
01164 {
01165   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES) || _game_mode == GM_MENU) return;
01166 
01167   const Town *t;
01168   FOR_ALL_TOWNS(t) {
01169     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &t->sign,
01170         _settings_client.gui.population_in_label ? STR_VIEWPORT_TOWN_POP : STR_VIEWPORT_TOWN,
01171         STR_VIEWPORT_TOWN_TINY_WHITE, STR_VIEWPORT_TOWN_TINY_BLACK,
01172         t->index, t->population);
01173   }
01174 }
01175 
01176 
01177 static void ViewportAddStationNames(DrawPixelInfo *dpi)
01178 {
01179   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || _game_mode == GM_MENU) return;
01180 
01181   const BaseStation *st;
01182   FOR_ALL_BASE_STATIONS(st) {
01183     /* Check whether the base station is a station or a waypoint */
01184     bool is_station = Station::IsExpected(st);
01185 
01186     /* Don't draw if the display options are disabled */
01187     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
01188 
01189     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &st->sign,
01190         is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT,
01191         (is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT) + 1, STR_NULL,
01192         st->index, st->facilities, (st->owner == OWNER_NONE || !st->IsInUse()) ? COLOUR_GREY : _company_colours[st->owner]);
01193   }
01194 }
01195 
01196 
01197 static void ViewportAddSigns(DrawPixelInfo *dpi)
01198 {
01199   /* Signs are turned off or are invisible */
01200   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS)) return;
01201 
01202   const Sign *si;
01203   FOR_ALL_SIGNS(si) {
01204     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &si->sign,
01205         STR_WHITE_SIGN,
01206         IsTransparencySet(TO_SIGNS) ? STR_VIEWPORT_SIGN_SMALL_WHITE : STR_VIEWPORT_SIGN_SMALL_BLACK, STR_NULL,
01207         si->index, 0, (si->owner == OWNER_NONE) ? COLOUR_GREY : _company_colours[si->owner]);
01208   }
01209 }
01210 
01217 void ViewportSign::UpdatePosition(int center, int top, StringID str)
01218 {
01219   if (this->width_normal != 0) this->MarkDirty();
01220 
01221   this->top = top;
01222 
01223   char buffer[DRAW_STRING_BUFFER];
01224 
01225   GetString(buffer, str, lastof(buffer));
01226   this->width_normal = VPSM_LEFT + Align(GetStringBoundingBox(buffer).width, 2) + VPSM_RIGHT;
01227   this->center = center;
01228 
01229   /* zoomed out version */
01230   this->width_small = VPSM_LEFT + Align(GetStringBoundingBox(buffer, FS_SMALL).width, 2) + VPSM_RIGHT;
01231 
01232   this->MarkDirty();
01233 }
01234 
01240 void ViewportSign::MarkDirty() const
01241 {
01242   /* We use ZOOM_LVL_MAX here, as every viewport can have another zoom,
01243    *  and there is no way for us to know which is the biggest. So make the
01244    *  biggest area dirty, and we are safe for sure.
01245    * We also add 1 to make sure the whole thing is redrawn. */
01246   MarkAllViewportsDirty(
01247     this->center - ScaleByZoom(this->width_normal / 2 + 1, ZOOM_LVL_MAX),
01248     this->top    - ScaleByZoom(1, ZOOM_LVL_MAX),
01249     this->center + ScaleByZoom(this->width_normal / 2 + 1, ZOOM_LVL_MAX),
01250     this->top    + ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM + 1, ZOOM_LVL_MAX));
01251 }
01252 
01253 static void ViewportDrawTileSprites(const TileSpriteToDrawVector *tstdv)
01254 {
01255   const TileSpriteToDraw *tsend = tstdv->End();
01256   for (const TileSpriteToDraw *ts = tstdv->Begin(); ts != tsend; ++ts) {
01257     DrawSprite(ts->image, ts->pal, ts->x, ts->y, ts->sub);
01258   }
01259 }
01260 
01262 static void ViewportSortParentSprites(ParentSpriteToSortVector *psdv)
01263 {
01264   ParentSpriteToDraw **psdvend = psdv->End();
01265   ParentSpriteToDraw **psd = psdv->Begin();
01266   while (psd != psdvend) {
01267     ParentSpriteToDraw *ps = *psd;
01268 
01269     if (ps->comparison_done) {
01270       psd++;
01271       continue;
01272     }
01273 
01274     ps->comparison_done = true;
01275 
01276     for (ParentSpriteToDraw **psd2 = psd + 1; psd2 != psdvend; psd2++) {
01277       ParentSpriteToDraw *ps2 = *psd2;
01278 
01279       if (ps2->comparison_done) continue;
01280 
01281       /* Decide which comparator to use, based on whether the bounding
01282        * boxes overlap
01283        */
01284       if (ps->xmax >= ps2->xmin && ps->xmin <= ps2->xmax && // overlap in X?
01285           ps->ymax >= ps2->ymin && ps->ymin <= ps2->ymax && // overlap in Y?
01286           ps->zmax >= ps2->zmin && ps->zmin <= ps2->zmax) { // overlap in Z?
01287         /* Use X+Y+Z as the sorting order, so sprites closer to the bottom of
01288          * the screen and with higher Z elevation, are drawn in front.
01289          * Here X,Y,Z are the coordinates of the "center of mass" of the sprite,
01290          * i.e. X=(left+right)/2, etc.
01291          * However, since we only care about order, don't actually divide / 2
01292          */
01293         if (ps->xmin + ps->xmax + ps->ymin + ps->ymax + ps->zmin + ps->zmax <=
01294             ps2->xmin + ps2->xmax + ps2->ymin + ps2->ymax + ps2->zmin + ps2->zmax) {
01295           continue;
01296         }
01297       } else {
01298         /* We only change the order, if it is definite.
01299          * I.e. every single order of X, Y, Z says ps2 is behind ps or they overlap.
01300          * That is: If one partial order says ps behind ps2, do not change the order.
01301          */
01302         if (ps->xmax < ps2->xmin ||
01303             ps->ymax < ps2->ymin ||
01304             ps->zmax < ps2->zmin) {
01305           continue;
01306         }
01307       }
01308 
01309       /* Move ps2 in front of ps */
01310       ParentSpriteToDraw *temp = ps2;
01311       for (ParentSpriteToDraw **psd3 = psd2; psd3 > psd; psd3--) {
01312         *psd3 = *(psd3 - 1);
01313       }
01314       *psd = temp;
01315     }
01316   }
01317 }
01318 
01319 static void ViewportDrawParentSprites(const ParentSpriteToSortVector *psd, const ChildScreenSpriteToDrawVector *csstdv)
01320 {
01321   const ParentSpriteToDraw * const *psd_end = psd->End();
01322   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
01323     const ParentSpriteToDraw *ps = *it;
01324     if (ps->image != SPR_EMPTY_BOUNDING_BOX) DrawSprite(ps->image, ps->pal, ps->x, ps->y, ps->sub);
01325 
01326     int child_idx = ps->first_child;
01327     while (child_idx >= 0) {
01328       const ChildScreenSpriteToDraw *cs = csstdv->Get(child_idx);
01329       child_idx = cs->next;
01330       DrawSprite(cs->image, cs->pal, ps->left + cs->x, ps->top + cs->y, cs->sub);
01331     }
01332   }
01333 }
01334 
01339 static void ViewportDrawBoundingBoxes(const ParentSpriteToSortVector *psd)
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     Point pt1 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmax + 1); // top front corner
01345     Point pt2 = RemapCoords(ps->xmin    , ps->ymax + 1, ps->zmax + 1); // top left corner
01346     Point pt3 = RemapCoords(ps->xmax + 1, ps->ymin    , ps->zmax + 1); // top right corner
01347     Point pt4 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmin    ); // bottom front corner
01348 
01349     DrawBox(        pt1.x,         pt1.y,
01350             pt2.x - pt1.x, pt2.y - pt1.y,
01351             pt3.x - pt1.x, pt3.y - pt1.y,
01352             pt4.x - pt1.x, pt4.y - pt1.y);
01353   }
01354 }
01355 
01356 static void ViewportDrawStrings(DrawPixelInfo *dpi, const StringSpriteToDrawVector *sstdv)
01357 {
01358   DrawPixelInfo dp;
01359   ZoomLevel zoom;
01360 
01361   _cur_dpi = &dp;
01362   dp = *dpi;
01363 
01364   zoom = dp.zoom;
01365   dp.zoom = ZOOM_LVL_NORMAL;
01366 
01367   dp.left   = UnScaleByZoom(dp.left,   zoom);
01368   dp.top    = UnScaleByZoom(dp.top,    zoom);
01369   dp.width  = UnScaleByZoom(dp.width,  zoom);
01370   dp.height = UnScaleByZoom(dp.height, zoom);
01371 
01372   const StringSpriteToDraw *ssend = sstdv->End();
01373   for (const StringSpriteToDraw *ss = sstdv->Begin(); ss != ssend; ++ss) {
01374     TextColour colour = TC_BLACK;
01375     bool small = HasBit(ss->width, 15);
01376     int w = GB(ss->width, 0, 15);
01377     int x = UnScaleByZoom(ss->x, zoom);
01378     int y = UnScaleByZoom(ss->y, zoom);
01379     int h = VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM;
01380 
01381     SetDParam(0, ss->params[0]);
01382     SetDParam(1, ss->params[1]);
01383 
01384     if (ss->colour != INVALID_COLOUR) {
01385       /* Do not draw signs nor station names if they are set invisible */
01386       if (IsInvisibilitySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) continue;
01387 
01388       /* if we didn't draw a rectangle, or if transparant building is on,
01389        * draw the text in the colour the rectangle would have */
01390       if (IsTransparencySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) {
01391         /* Real colours need the TC_IS_PALETTE_COLOUR flag
01392          * otherwise colours from _string_colourmap are assumed. */
01393         colour = (TextColour)_colour_gradient[ss->colour][6] | TC_IS_PALETTE_COLOUR;
01394       }
01395 
01396       /* Draw the rectangle if 'tranparent station signs' is off,
01397        * or if we are drawing a general text sign (STR_WHITE_SIGN) */
01398       if (!IsTransparencySet(TO_SIGNS) || ss->string == STR_WHITE_SIGN) {
01399         DrawFrameRect(
01400           x, y, x + w, y + h, ss->colour,
01401           IsTransparencySet(TO_SIGNS) ? FR_TRANSPARENT : FR_NONE
01402         );
01403       }
01404     }
01405 
01406     DrawString(x + VPSM_LEFT, x + w - 1 - VPSM_RIGHT, y + VPSM_TOP, ss->string, colour, SA_HOR_CENTER);
01407   }
01408 }
01409 
01410 void ViewportDoDraw(const ViewPort *vp, int left, int top, int right, int bottom)
01411 {
01412   DrawPixelInfo *old_dpi = _cur_dpi;
01413   _cur_dpi = &_vd.dpi;
01414 
01415   _vd.dpi.zoom = vp->zoom;
01416   int mask = ScaleByZoom(-1, vp->zoom);
01417 
01418   _vd.combine_sprites = SPRITE_COMBINE_NONE;
01419 
01420   _vd.dpi.width = (right - left) & mask;
01421   _vd.dpi.height = (bottom - top) & mask;
01422   _vd.dpi.left = left & mask;
01423   _vd.dpi.top = top & mask;
01424   _vd.dpi.pitch = old_dpi->pitch;
01425   _vd.last_child = NULL;
01426 
01427   int x = UnScaleByZoom(_vd.dpi.left - (vp->virtual_left & mask), vp->zoom) + vp->left;
01428   int y = UnScaleByZoom(_vd.dpi.top - (vp->virtual_top & mask), vp->zoom) + vp->top;
01429 
01430   _vd.dpi.dst_ptr = BlitterFactoryBase::GetCurrentBlitter()->MoveTo(old_dpi->dst_ptr, x - old_dpi->left, y - old_dpi->top);
01431 
01432   ViewportAddLandscape();
01433   ViewportAddVehicles(&_vd.dpi);
01434 
01435   ViewportAddTownNames(&_vd.dpi);
01436   ViewportAddStationNames(&_vd.dpi);
01437   ViewportAddSigns(&_vd.dpi);
01438 
01439   DrawTextEffects(&_vd.dpi);
01440 
01441   if (_vd.tile_sprites_to_draw.Length() != 0) ViewportDrawTileSprites(&_vd.tile_sprites_to_draw);
01442 
01443   ParentSpriteToDraw *psd_end = _vd.parent_sprites_to_draw.End();
01444   for (ParentSpriteToDraw *it = _vd.parent_sprites_to_draw.Begin(); it != psd_end; it++) {
01445     *_vd.parent_sprites_to_sort.Append() = it;
01446   }
01447 
01448   ViewportSortParentSprites(&_vd.parent_sprites_to_sort);
01449   ViewportDrawParentSprites(&_vd.parent_sprites_to_sort, &_vd.child_screen_sprites_to_draw);
01450 
01451   if (_draw_bounding_boxes) ViewportDrawBoundingBoxes(&_vd.parent_sprites_to_sort);
01452 
01453   if (_vd.string_sprites_to_draw.Length() != 0) ViewportDrawStrings(&_vd.dpi, &_vd.string_sprites_to_draw);
01454 
01455   _cur_dpi = old_dpi;
01456 
01457   _vd.string_sprites_to_draw.Clear();
01458   _vd.tile_sprites_to_draw.Clear();
01459   _vd.parent_sprites_to_draw.Clear();
01460   _vd.parent_sprites_to_sort.Clear();
01461   _vd.child_screen_sprites_to_draw.Clear();
01462 }
01463 
01468 static void ViewportDrawChk(const ViewPort *vp, int left, int top, int right, int bottom)
01469 {
01470   if (ScaleByZoom(bottom - top, vp->zoom) * ScaleByZoom(right - left, vp->zoom) > 180000) {
01471     if ((bottom - top) > (right - left)) {
01472       int t = (top + bottom) >> 1;
01473       ViewportDrawChk(vp, left, top, right, t);
01474       ViewportDrawChk(vp, left, t, right, bottom);
01475     } else {
01476       int t = (left + right) >> 1;
01477       ViewportDrawChk(vp, left, top, t, bottom);
01478       ViewportDrawChk(vp, t, top, right, bottom);
01479     }
01480   } else {
01481     ViewportDoDraw(vp,
01482       ScaleByZoom(left - vp->left, vp->zoom) + vp->virtual_left,
01483       ScaleByZoom(top - vp->top, vp->zoom) + vp->virtual_top,
01484       ScaleByZoom(right - vp->left, vp->zoom) + vp->virtual_left,
01485       ScaleByZoom(bottom - vp->top, vp->zoom) + vp->virtual_top
01486     );
01487   }
01488 }
01489 
01490 static inline void ViewportDraw(const ViewPort *vp, int left, int top, int right, int bottom)
01491 {
01492   if (right <= vp->left || bottom <= vp->top) return;
01493 
01494   if (left >= vp->left + vp->width) return;
01495 
01496   if (left < vp->left) left = vp->left;
01497   if (right > vp->left + vp->width) right = vp->left + vp->width;
01498 
01499   if (top >= vp->top + vp->height) return;
01500 
01501   if (top < vp->top) top = vp->top;
01502   if (bottom > vp->top + vp->height) bottom = vp->top + vp->height;
01503 
01504   ViewportDrawChk(vp, left, top, right, bottom);
01505 }
01506 
01510 void Window::DrawViewport() const
01511 {
01512   DrawPixelInfo *dpi = _cur_dpi;
01513 
01514   dpi->left += this->left;
01515   dpi->top += this->top;
01516 
01517   ViewportDraw(this->viewport, dpi->left, dpi->top, dpi->left + dpi->width, dpi->top + dpi->height);
01518 
01519   dpi->left -= this->left;
01520   dpi->top -= this->top;
01521 }
01522 
01523 static inline void ClampViewportToMap(const ViewPort *vp, int &x, int &y)
01524 {
01525   /* Centre of the viewport is hot spot */
01526   x += vp->virtual_width / 2;
01527   y += vp->virtual_height / 2;
01528 
01529   /* Convert viewport coordinates to map coordinates
01530    * Calculation is scaled by 4 to avoid rounding errors */
01531   int vx = -x + y * 2;
01532   int vy =  x + y * 2;
01533 
01534   /* clamp to size of map */
01535   vx = Clamp(vx, 0, MapMaxX() * TILE_SIZE * 4);
01536   vy = Clamp(vy, 0, MapMaxY() * TILE_SIZE * 4);
01537 
01538   /* Convert map coordinates to viewport coordinates */
01539   x = (-vx + vy) / 2;
01540   y = ( vx + vy) / 4;
01541 
01542   /* Remove centering */
01543   x -= vp->virtual_width / 2;
01544   y -= vp->virtual_height / 2;
01545 }
01546 
01551 void UpdateViewportPosition(Window *w)
01552 {
01553   const ViewPort *vp = w->viewport;
01554 
01555   if (w->viewport->follow_vehicle != INVALID_VEHICLE) {
01556     const Vehicle *veh = Vehicle::Get(w->viewport->follow_vehicle);
01557     Point pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
01558 
01559     w->viewport->scrollpos_x = pt.x;
01560     w->viewport->scrollpos_y = pt.y;
01561     SetViewportPosition(w, pt.x, pt.y);
01562   } else {
01563     /* Ensure the destination location is within the map */
01564     ClampViewportToMap(vp, w->viewport->dest_scrollpos_x, w->viewport->dest_scrollpos_y);
01565 
01566     int delta_x = w->viewport->dest_scrollpos_x - w->viewport->scrollpos_x;
01567     int delta_y = w->viewport->dest_scrollpos_y - w->viewport->scrollpos_y;
01568 
01569     if (delta_x != 0 || delta_y != 0) {
01570       if (_settings_client.gui.smooth_scroll) {
01571         int max_scroll = ScaleByMapSize1D(512);
01572         /* Not at our desired position yet... */
01573         w->viewport->scrollpos_x += Clamp(delta_x / 4, -max_scroll, max_scroll);
01574         w->viewport->scrollpos_y += Clamp(delta_y / 4, -max_scroll, max_scroll);
01575       } else {
01576         w->viewport->scrollpos_x = w->viewport->dest_scrollpos_x;
01577         w->viewport->scrollpos_y = w->viewport->dest_scrollpos_y;
01578       }
01579     }
01580 
01581     ClampViewportToMap(vp, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
01582 
01583     SetViewportPosition(w, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
01584   }
01585 }
01586 
01596 static void MarkViewportDirty(const ViewPort *vp, int left, int top, int right, int bottom)
01597 {
01598   right -= vp->virtual_left;
01599   if (right <= 0) return;
01600 
01601   bottom -= vp->virtual_top;
01602   if (bottom <= 0) return;
01603 
01604   left = max(0, left - vp->virtual_left);
01605 
01606   if (left >= vp->virtual_width) return;
01607 
01608   top = max(0, top - vp->virtual_top);
01609 
01610   if (top >= vp->virtual_height) return;
01611 
01612   SetDirtyBlocks(
01613     UnScaleByZoomLower(left, vp->zoom) + vp->left,
01614     UnScaleByZoomLower(top, vp->zoom) + vp->top,
01615     UnScaleByZoom(right, vp->zoom) + vp->left + 1,
01616     UnScaleByZoom(bottom, vp->zoom) + vp->top + 1
01617   );
01618 }
01619 
01628 void MarkAllViewportsDirty(int left, int top, int right, int bottom)
01629 {
01630   Window *w;
01631   FOR_ALL_WINDOWS_FROM_BACK(w) {
01632     ViewPort *vp = w->viewport;
01633     if (vp != NULL) {
01634       assert(vp->width != 0);
01635       MarkViewportDirty(vp, left, top, right, bottom);
01636     }
01637   }
01638 }
01639 
01645 void MarkTileDirtyByTile(TileIndex tile)
01646 {
01647   Point pt = RemapCoords(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, GetTileZ(tile));
01648   MarkAllViewportsDirty(
01649     pt.x - 31,
01650     pt.y - 122,
01651     pt.x - 31 + 67,
01652     pt.y - 122 + 154
01653   );
01654 }
01655 
01663 static void SetSelectionTilesDirty()
01664 {
01665   int x_size = _thd.size.x;
01666   int y_size = _thd.size.y;
01667 
01668   if (!_thd.diagonal) { // Selecting in a straigth rectangle (or a single square)
01669     int x_start = _thd.pos.x;
01670     int y_start = _thd.pos.y;
01671 
01672     if (_thd.outersize.x != 0) {
01673       x_size  += _thd.outersize.x;
01674       x_start += _thd.offs.x;
01675       y_size  += _thd.outersize.y;
01676       y_start += _thd.offs.y;
01677     }
01678 
01679     x_size -= TILE_SIZE;
01680     y_size -= TILE_SIZE;
01681 
01682     assert(x_size >= 0);
01683     assert(y_size >= 0);
01684 
01685     int x_end = Clamp(x_start + x_size, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
01686     int y_end = Clamp(y_start + y_size, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
01687 
01688     x_start = Clamp(x_start, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
01689     y_start = Clamp(y_start, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
01690 
01691     /* make sure everything is multiple of TILE_SIZE */
01692     assert((x_end | y_end | x_start | y_start) % TILE_SIZE == 0);
01693 
01694     /* How it works:
01695      * Suppose we have to mark dirty rectangle of 3x4 tiles:
01696      *   x
01697      *  xxx
01698      * xxxxx
01699      *  xxxxx
01700      *   xxx
01701      *    x
01702      * This algorithm marks dirty columns of tiles, so it is done in 3+4-1 steps:
01703      * 1)  x     2)  x
01704      *    xxx       Oxx
01705      *   Oxxxx     xOxxx
01706      *    xxxxx     Oxxxx
01707      *     xxx       xxx
01708      *      x         x
01709      * And so forth...
01710      */
01711 
01712     int top_x = x_end; // coordinates of top dirty tile
01713     int top_y = y_start;
01714     int bot_x = top_x; // coordinates of bottom dirty tile
01715     int bot_y = top_y;
01716 
01717     do {
01718       Point top = RemapCoords2(top_x, top_y); // topmost dirty point
01719       Point bot = RemapCoords2(bot_x + TILE_SIZE - 1, bot_y + TILE_SIZE - 1); // bottommost point
01720 
01721       /* the 'x' coordinate of 'top' and 'bot' is the same (and always in the same distance from tile middle),
01722        * tile height/slope affects only the 'y' on-screen coordinate! */
01723 
01724       int l = top.x - (TILE_PIXELS - 2); // 'x' coordinate of left side of dirty rectangle
01725       int t = top.y;                     // 'y' coordinate of top side -//-
01726       int r = top.x + (TILE_PIXELS - 2); // right side of dirty rectangle
01727       int b = bot.y;                     // bottom -//-
01728 
01729       static const int OVERLAY_WIDTH = 4; // part of selection sprites is drawn outside the selected area
01730 
01731       /* For halftile foundations on SLOPE_STEEP_S the sprite extents some more towards the top */
01732       MarkAllViewportsDirty(l - OVERLAY_WIDTH, t - OVERLAY_WIDTH - TILE_HEIGHT, r + OVERLAY_WIDTH, b + OVERLAY_WIDTH);
01733 
01734       /* haven't we reached the topmost tile yet? */
01735       if (top_x != x_start) {
01736         top_x -= TILE_SIZE;
01737       } else {
01738         top_y += TILE_SIZE;
01739       }
01740 
01741       /* the way the bottom tile changes is different when we reach the bottommost tile */
01742       if (bot_y != y_end) {
01743         bot_y += TILE_SIZE;
01744       } else {
01745         bot_x -= TILE_SIZE;
01746       }
01747     } while (bot_x >= top_x);
01748   } else { // Selecting in a 45 degrees rotated (diagonal) rectangle.
01749     /* a_size, b_size describe a rectangle with rotated coordinates */
01750     int a_size = x_size + y_size, b_size = x_size - y_size;
01751 
01752     int interval_a = a_size < 0 ? -(int)TILE_SIZE : (int)TILE_SIZE;
01753     int interval_b = b_size < 0 ? -(int)TILE_SIZE : (int)TILE_SIZE;
01754 
01755     for (int a = -interval_a; a != a_size + interval_a; a += interval_a) {
01756       for (int b = -interval_b; b != b_size + interval_b; b += interval_b) {
01757         uint x = (_thd.pos.x + (a + b) / 2) / TILE_SIZE;
01758         uint y = (_thd.pos.y + (a - b) / 2) / TILE_SIZE;
01759 
01760         if (x < MapMaxX() && y < MapMaxY()) {
01761           MarkTileDirtyByTile(TileXY(x, y));
01762         }
01763       }
01764     }
01765   }
01766 }
01767 
01768 
01769 void SetSelectionRed(bool b)
01770 {
01771   _thd.make_square_red = b;
01772   SetSelectionTilesDirty();
01773 }
01774 
01783 static bool CheckClickOnViewportSign(const ViewPort *vp, int x, int y, const ViewportSign *sign)
01784 {
01785   bool small = (vp->zoom >= ZOOM_LVL_OUT_4X);
01786   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, vp->zoom);
01787   int sign_height = ScaleByZoom(VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM, vp->zoom);
01788 
01789   x = ScaleByZoom(x - vp->left, vp->zoom) + vp->virtual_left;
01790   y = ScaleByZoom(y - vp->top, vp->zoom) + vp->virtual_top;
01791 
01792   return y >= sign->top && y < sign->top + sign_height &&
01793       x >= sign->center - sign_half_width && x < sign->center + sign_half_width;
01794 }
01795 
01796 static bool CheckClickOnTown(const ViewPort *vp, int x, int y)
01797 {
01798   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES)) return false;
01799 
01800   const Town *t;
01801   FOR_ALL_TOWNS(t) {
01802     if (CheckClickOnViewportSign(vp, x, y, &t->sign)) {
01803       ShowTownViewWindow(t->index);
01804       return true;
01805     }
01806   }
01807 
01808   return false;
01809 }
01810 
01811 static bool CheckClickOnStation(const ViewPort *vp, int x, int y)
01812 {
01813   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || IsInvisibilitySet(TO_SIGNS)) return false;
01814 
01815   const BaseStation *st;
01816   FOR_ALL_BASE_STATIONS(st) {
01817     /* Check whether the base station is a station or a waypoint */
01818     bool is_station = Station::IsExpected(st);
01819 
01820     /* Don't check if the display options are disabled */
01821     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
01822 
01823     if (CheckClickOnViewportSign(vp, x, y, &st->sign)) {
01824       if (is_station) {
01825         ShowStationViewWindow(st->index);
01826       } else {
01827         ShowWaypointWindow(Waypoint::From(st));
01828       }
01829       return true;
01830     }
01831   }
01832 
01833   return false;
01834 }
01835 
01836 
01837 static bool CheckClickOnSign(const ViewPort *vp, int x, int y)
01838 {
01839   /* Signs are turned off, or they are transparent and invisibility is ON, or company is a spectator */
01840   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS) || _local_company == COMPANY_SPECTATOR) return false;
01841 
01842   const Sign *si;
01843   FOR_ALL_SIGNS(si) {
01844     if (CheckClickOnViewportSign(vp, x, y, &si->sign)) {
01845       HandleClickOnSign(si);
01846       return true;
01847     }
01848   }
01849 
01850   return false;
01851 }
01852 
01853 
01854 static bool CheckClickOnLandscape(const ViewPort *vp, int x, int y)
01855 {
01856   Point pt = TranslateXYToTileCoord(vp, x, y);
01857 
01858   if (pt.x != -1) return ClickTile(TileVirtXY(pt.x, pt.y));
01859   return true;
01860 }
01861 
01862 static void PlaceObject()
01863 {
01864   Point pt;
01865   Window *w;
01866 
01867   pt = GetTileBelowCursor();
01868   if (pt.x == -1) return;
01869 
01870   if ((_thd.place_mode & HT_DRAG_MASK) == HT_POINT) {
01871     pt.x += 8;
01872     pt.y += 8;
01873   }
01874 
01875   _tile_fract_coords.x = pt.x & TILE_UNIT_MASK;
01876   _tile_fract_coords.y = pt.y & TILE_UNIT_MASK;
01877 
01878   w = _thd.GetCallbackWnd();
01879   if (w != NULL) w->OnPlaceObject(pt, TileVirtXY(pt.x, pt.y));
01880 }
01881 
01882 
01883 bool HandleViewportClicked(const ViewPort *vp, int x, int y)
01884 {
01885   const Vehicle *v = CheckClickOnVehicle(vp, x, y);
01886 
01887   if (_thd.place_mode & HT_VEHICLE) {
01888     if (v != NULL && VehicleClicked(v)) return true;
01889   }
01890 
01891   /* Vehicle placement mode already handled above. */
01892   if ((_thd.place_mode & HT_DRAG_MASK) != HT_NONE) {
01893     PlaceObject();
01894     return true;
01895   }
01896 
01897   if (CheckClickOnTown(vp, x, y)) return true;
01898   if (CheckClickOnStation(vp, x, y)) return true;
01899   if (CheckClickOnSign(vp, x, y)) return true;
01900   bool result = CheckClickOnLandscape(vp, x, y);
01901 
01902   if (v != NULL) {
01903     DEBUG(misc, 2, "Vehicle %d (index %d) at %p", v->unitnumber, v->index, v);
01904     if (IsCompanyBuildableVehicleType(v)) {
01905       v = v->First();
01906       if (_ctrl_pressed && v->owner == _local_company) {
01907         StartStopVehicle(v, true);
01908       } else {
01909         ShowVehicleViewWindow(v);
01910       }
01911     }
01912     return true;
01913   }
01914   return result;
01915 }
01916 
01917 
01927 bool ScrollWindowTo(int x, int y, int z, Window *w, bool instant)
01928 {
01929   /* The slope cannot be acquired outside of the map, so make sure we are always within the map. */
01930   if (z == -1) z = GetSlopeZ(Clamp(x, 0, MapSizeX() * TILE_SIZE - 1), Clamp(y, 0, MapSizeY() * TILE_SIZE - 1));
01931 
01932   Point pt = MapXYZToViewport(w->viewport, x, y, z);
01933   w->viewport->follow_vehicle = INVALID_VEHICLE;
01934 
01935   if (w->viewport->dest_scrollpos_x == pt.x && w->viewport->dest_scrollpos_y == pt.y) return false;
01936 
01937   if (instant) {
01938     w->viewport->scrollpos_x = pt.x;
01939     w->viewport->scrollpos_y = pt.y;
01940   }
01941 
01942   w->viewport->dest_scrollpos_x = pt.x;
01943   w->viewport->dest_scrollpos_y = pt.y;
01944   return true;
01945 }
01946 
01954 bool ScrollWindowToTile(TileIndex tile, Window *w, bool instant)
01955 {
01956   return ScrollWindowTo(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, -1, w, instant);
01957 }
01958 
01965 bool ScrollMainWindowToTile(TileIndex tile, bool instant)
01966 {
01967   return ScrollMainWindowTo(TileX(tile) * TILE_SIZE + TILE_SIZE / 2, TileY(tile) * TILE_SIZE + TILE_SIZE / 2, -1, instant);
01968 }
01969 
01974 void SetRedErrorSquare(TileIndex tile)
01975 {
01976   TileIndex old;
01977 
01978   old = _thd.redsq;
01979   _thd.redsq = tile;
01980 
01981   if (tile != old) {
01982     if (tile != INVALID_TILE) MarkTileDirtyByTile(tile);
01983     if (old  != INVALID_TILE) MarkTileDirtyByTile(old);
01984   }
01985 }
01986 
01992 void SetTileSelectSize(int w, int h)
01993 {
01994   _thd.new_size.x = w * TILE_SIZE;
01995   _thd.new_size.y = h * TILE_SIZE;
01996   _thd.new_outersize.x = 0;
01997   _thd.new_outersize.y = 0;
01998 }
01999 
02000 void SetTileSelectBigSize(int ox, int oy, int sx, int sy)
02001 {
02002   _thd.offs.x = ox * TILE_SIZE;
02003   _thd.offs.y = oy * TILE_SIZE;
02004   _thd.new_outersize.x = sx * TILE_SIZE;
02005   _thd.new_outersize.y = sy * TILE_SIZE;
02006 }
02007 
02009 static HighLightStyle GetAutorailHT(int x, int y)
02010 {
02011   return HT_RAIL | _autorail_piece[x & TILE_UNIT_MASK][y & TILE_UNIT_MASK];
02012 }
02013 
02017 void TileHighlightData::Reset()
02018 {
02019   this->pos.x = 0;
02020   this->pos.y = 0;
02021   this->new_pos.x = 0;
02022   this->new_pos.y = 0;
02023 }
02024 
02029 bool TileHighlightData::IsDraggingDiagonal()
02030 {
02031   return (this->place_mode & HT_DIAGONAL) != 0 && _ctrl_pressed && _left_button_down;
02032 }
02033 
02038 Window *TileHighlightData::GetCallbackWnd()
02039 {
02040   return FindWindowById(this->window_class, this->window_number);
02041 }
02042 
02043 
02044 
02052 void UpdateTileSelection()
02053 {
02054   int x1;
02055   int y1;
02056 
02057   HighLightStyle new_drawstyle = HT_NONE;
02058   bool new_diagonal = false;
02059 
02060   if ((_thd.place_mode & HT_DRAG_MASK) == HT_SPECIAL) {
02061     x1 = _thd.selend.x;
02062     y1 = _thd.selend.y;
02063     if (x1 != -1) {
02064       int x2 = _thd.selstart.x & ~TILE_UNIT_MASK;
02065       int y2 = _thd.selstart.y & ~TILE_UNIT_MASK;
02066       x1 &= ~TILE_UNIT_MASK;
02067       y1 &= ~TILE_UNIT_MASK;
02068 
02069       if (_thd.IsDraggingDiagonal()) {
02070         new_diagonal = true;
02071       } else {
02072         if (x1 >= x2) Swap(x1, x2);
02073         if (y1 >= y2) Swap(y1, y2);
02074       }
02075       _thd.new_pos.x = x1;
02076       _thd.new_pos.y = y1;
02077       _thd.new_size.x = x2 - x1;
02078       _thd.new_size.y = y2 - y1;
02079       if (!new_diagonal) {
02080         _thd.new_size.x += TILE_SIZE;
02081         _thd.new_size.y += TILE_SIZE;
02082       }
02083       new_drawstyle = _thd.next_drawstyle;
02084     }
02085   } else if ((_thd.place_mode & HT_DRAG_MASK) != HT_NONE) {
02086     Point pt = GetTileBelowCursor();
02087     x1 = pt.x;
02088     y1 = pt.y;
02089     if (x1 != -1) {
02090       switch (_thd.place_mode & HT_DRAG_MASK) {
02091         case HT_RECT:
02092           new_drawstyle = HT_RECT;
02093           break;
02094         case HT_POINT:
02095           new_drawstyle = HT_POINT;
02096           x1 += TILE_SIZE / 2;
02097           y1 += TILE_SIZE / 2;
02098           break;
02099         case HT_RAIL:
02100           /* Draw one highlighted tile in any direction */
02101           new_drawstyle = GetAutorailHT(pt.x, pt.y);
02102           break;
02103         case HT_LINE:
02104           switch (_thd.place_mode & HT_DIR_MASK) {
02105             case HT_DIR_X: new_drawstyle = HT_LINE | HT_DIR_X; break;
02106             case HT_DIR_Y: new_drawstyle = HT_LINE | HT_DIR_Y; break;
02107 
02108             case HT_DIR_HU:
02109             case HT_DIR_HL:
02110               new_drawstyle = (pt.x & TILE_UNIT_MASK) + (pt.y & TILE_UNIT_MASK) <= TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
02111               break;
02112 
02113             case HT_DIR_VL:
02114             case HT_DIR_VR:
02115               new_drawstyle = (pt.x & TILE_UNIT_MASK) > (pt.y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02116               break;
02117 
02118             default: NOT_REACHED();
02119           }
02120           _thd.selstart.x = x1 & ~TILE_UNIT_MASK;
02121           _thd.selstart.y = y1 & ~TILE_UNIT_MASK;
02122           break;
02123         default:
02124           NOT_REACHED();
02125           break;
02126       }
02127       _thd.new_pos.x = x1 & ~TILE_UNIT_MASK;
02128       _thd.new_pos.y = y1 & ~TILE_UNIT_MASK;
02129     }
02130   }
02131 
02132   /* redraw selection */
02133   if (_thd.drawstyle != new_drawstyle ||
02134       _thd.pos.x != _thd.new_pos.x || _thd.pos.y != _thd.new_pos.y ||
02135       _thd.size.x != _thd.new_size.x || _thd.size.y != _thd.new_size.y ||
02136       _thd.outersize.x != _thd.new_outersize.x ||
02137       _thd.outersize.y != _thd.new_outersize.y ||
02138       _thd.diagonal    != new_diagonal) {
02139     /* Clear the old tile selection? */
02140     if ((_thd.drawstyle & HT_DRAG_MASK) != HT_NONE) SetSelectionTilesDirty();
02141 
02142     _thd.drawstyle = new_drawstyle;
02143     _thd.pos = _thd.new_pos;
02144     _thd.size = _thd.new_size;
02145     _thd.outersize = _thd.new_outersize;
02146     _thd.diagonal = new_diagonal;
02147     _thd.dirty = 0xff;
02148 
02149     /* Draw the new tile selection? */
02150     if ((new_drawstyle & HT_DRAG_MASK) != HT_NONE) SetSelectionTilesDirty();
02151   }
02152 }
02153 
02161 static inline void ShowMeasurementTooltips(StringID str, uint paramcount, const uint64 params[], TooltipCloseCondition close_cond = TCC_LEFT_CLICK)
02162 {
02163   if (!_settings_client.gui.measure_tooltip) return;
02164   GuiShowTooltips(_thd.GetCallbackWnd(), str, paramcount, params, close_cond);
02165 }
02166 
02168 void VpStartPlaceSizing(TileIndex tile, ViewportPlaceMethod method, ViewportDragDropSelectionProcess process)
02169 {
02170   _thd.select_method = method;
02171   _thd.select_proc   = process;
02172   _thd.selend.x = TileX(tile) * TILE_SIZE;
02173   _thd.selstart.x = TileX(tile) * TILE_SIZE;
02174   _thd.selend.y = TileY(tile) * TILE_SIZE;
02175   _thd.selstart.y = TileY(tile) * TILE_SIZE;
02176 
02177   /* Needed so several things (road, autoroad, bridges, ...) are placed correctly.
02178    * In effect, placement starts from the centre of a tile
02179    */
02180   if (method == VPM_X_OR_Y || method == VPM_FIX_X || method == VPM_FIX_Y) {
02181     _thd.selend.x += TILE_SIZE / 2;
02182     _thd.selend.y += TILE_SIZE / 2;
02183     _thd.selstart.x += TILE_SIZE / 2;
02184     _thd.selstart.y += TILE_SIZE / 2;
02185   }
02186 
02187   HighLightStyle others = _thd.place_mode & ~(HT_DRAG_MASK | HT_DIR_MASK);
02188   if ((_thd.place_mode & HT_DRAG_MASK) == HT_RECT) {
02189     _thd.place_mode = HT_SPECIAL | others;
02190     _thd.next_drawstyle = HT_RECT | others;
02191   } else if (_thd.place_mode & (HT_RAIL | HT_LINE)) {
02192     _thd.place_mode = HT_SPECIAL | others;
02193     _thd.next_drawstyle = _thd.drawstyle | others;
02194   } else {
02195     _thd.place_mode = HT_SPECIAL | others;
02196     _thd.next_drawstyle = HT_POINT | others;
02197   }
02198   _special_mouse_mode = WSM_SIZING;
02199 }
02200 
02201 void VpSetPlaceSizingLimit(int limit)
02202 {
02203   _thd.sizelimit = limit;
02204 }
02205 
02211 void VpSetPresizeRange(TileIndex from, TileIndex to)
02212 {
02213   uint64 distance = DistanceManhattan(from, to) + 1;
02214 
02215   _thd.selend.x = TileX(to) * TILE_SIZE;
02216   _thd.selend.y = TileY(to) * TILE_SIZE;
02217   _thd.selstart.x = TileX(from) * TILE_SIZE;
02218   _thd.selstart.y = TileY(from) * TILE_SIZE;
02219   _thd.next_drawstyle = HT_RECT;
02220 
02221   /* show measurement only if there is any length to speak of */
02222   if (distance > 1) ShowMeasurementTooltips(STR_MEASURE_LENGTH, 1, &distance, TCC_HOVER);
02223 }
02224 
02225 static void VpStartPreSizing()
02226 {
02227   _thd.selend.x = -1;
02228   _special_mouse_mode = WSM_PRESIZE;
02229 }
02230 
02235 static HighLightStyle Check2x1AutoRail(int mode)
02236 {
02237   int fxpy = _tile_fract_coords.x + _tile_fract_coords.y;
02238   int sxpy = (_thd.selend.x & TILE_UNIT_MASK) + (_thd.selend.y & TILE_UNIT_MASK);
02239   int fxmy = _tile_fract_coords.x - _tile_fract_coords.y;
02240   int sxmy = (_thd.selend.x & TILE_UNIT_MASK) - (_thd.selend.y & TILE_UNIT_MASK);
02241 
02242   switch (mode) {
02243     default: NOT_REACHED();
02244     case 0: // end piece is lower right
02245       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
02246       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
02247       return HT_DIR_Y;
02248 
02249     case 1:
02250       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
02251       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
02252       return HT_DIR_Y;
02253 
02254     case 2:
02255       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
02256       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
02257       return HT_DIR_X;
02258 
02259     case 3:
02260       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
02261       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
02262       return HT_DIR_X;
02263   }
02264 }
02265 
02279 static bool SwapDirection(HighLightStyle style, TileIndex start_tile, TileIndex end_tile)
02280 {
02281   uint start_x = TileX(start_tile);
02282   uint start_y = TileY(start_tile);
02283   uint end_x = TileX(end_tile);
02284   uint end_y = TileY(end_tile);
02285 
02286   switch (style & HT_DRAG_MASK) {
02287     case HT_RAIL:
02288     case HT_LINE: return (end_x > start_x || (end_x == start_x && end_y > start_y));
02289 
02290     case HT_RECT:
02291     case HT_POINT: return (end_x != start_x && end_y < start_y);
02292     default: NOT_REACHED();
02293   }
02294 
02295   return false;
02296 }
02297 
02313 static int CalcHeightdiff(HighLightStyle style, uint distance, TileIndex start_tile, TileIndex end_tile)
02314 {
02315   bool swap = SwapDirection(style, start_tile, end_tile);
02316   uint h0, h1; // Start height and end height.
02317 
02318   if (start_tile == end_tile) return 0;
02319   if (swap) Swap(start_tile, end_tile);
02320 
02321   switch (style & HT_DRAG_MASK) {
02322     case HT_RECT: {
02323       static const TileIndexDiffC heightdiff_area_by_dir[] = {
02324         /* Start */ {1, 0}, /* Dragging east */ {0, 0}, // Dragging south
02325         /* End   */ {0, 1}, /* Dragging east */ {1, 1}  // Dragging south
02326       };
02327 
02328       /* In the case of an area we can determine whether we were dragging south or
02329        * east by checking the X-coordinates of the tiles */
02330       byte style_t = (byte)(TileX(end_tile) > TileX(start_tile));
02331       start_tile = TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_area_by_dir[style_t]));
02332       end_tile   = TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_area_by_dir[2 + style_t]));
02333       /* FALL THROUGH */
02334     }
02335 
02336     case HT_POINT:
02337       h0 = TileHeight(start_tile);
02338       h1 = TileHeight(end_tile);
02339       break;
02340     default: { // All other types, this is mostly only line/autorail
02341       static const HighLightStyle flip_style_direction[] = {
02342         HT_DIR_X, HT_DIR_Y, HT_DIR_HL, HT_DIR_HU, HT_DIR_VR, HT_DIR_VL
02343       };
02344       static const TileIndexDiffC heightdiff_line_by_dir[] = {
02345         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_X  */ {0, 1}, {1, 1}, // HT_DIR_Y
02346         /* Start */ {1, 0}, {0, 0}, /* HT_DIR_HU */ {1, 0}, {1, 1}, // HT_DIR_HL
02347         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_VL */ {0, 1}, {1, 1}, // HT_DIR_VR
02348 
02349         /* Start */ {0, 1}, {0, 0}, /* HT_DIR_X  */ {1, 0}, {0, 0}, // HT_DIR_Y
02350         /* End   */ {0, 1}, {0, 0}, /* HT_DIR_HU */ {1, 1}, {0, 1}, // HT_DIR_HL
02351         /* End   */ {1, 0}, {0, 0}, /* HT_DIR_VL */ {0, 0}, {0, 1}, // HT_DIR_VR
02352       };
02353 
02354       distance %= 2; // we're only interested if the distance is even or uneven
02355       style &= HT_DIR_MASK;
02356 
02357       /* To handle autorail, we do some magic to be able to use a lookup table.
02358        * Firstly if we drag the other way around, we switch start&end, and if needed
02359        * also flip the drag-position. Eg if it was on the left, and the distance is even
02360        * that means the end, which is now the start is on the right */
02361       if (swap && distance == 0) style = flip_style_direction[style];
02362 
02363       /* Use lookup table for start-tile based on HighLightStyle direction */
02364       byte style_t = style * 2;
02365       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
02366       h0 = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t])));
02367       uint ht = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t + 1])));
02368       h0 = max(h0, ht);
02369 
02370       /* Use lookup table for end-tile based on HighLightStyle direction
02371        * flip around side (lower/upper, left/right) based on distance */
02372       if (distance == 0) style_t = flip_style_direction[style] * 2;
02373       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
02374       h1 = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t])));
02375       ht = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t + 1])));
02376       h1 = max(h1, ht);
02377       break;
02378     }
02379   }
02380 
02381   if (swap) Swap(h0, h1);
02382   return (int)(h1 - h0) * TILE_HEIGHT_STEP;
02383 }
02384 
02385 static const StringID measure_strings_length[] = {STR_NULL, STR_MEASURE_LENGTH, STR_MEASURE_LENGTH_HEIGHTDIFF};
02386 
02393 static void CheckUnderflow(int &test, int &other, int mult)
02394 {
02395   if (test >= 0) return;
02396 
02397   other += mult * test;
02398   test = 0;
02399 }
02400 
02408 static void CheckOverflow(int &test, int &other, int max, int mult)
02409 {
02410   if (test <= max) return;
02411 
02412   other += mult * (test - max);
02413   test = max;
02414 }
02415 
02417 static void CalcRaildirsDrawstyle(int x, int y, int method)
02418 {
02419   HighLightStyle b;
02420 
02421   int dx = _thd.selstart.x - (_thd.selend.x & ~TILE_UNIT_MASK);
02422   int dy = _thd.selstart.y - (_thd.selend.y & ~TILE_UNIT_MASK);
02423   uint w = abs(dx) + TILE_SIZE;
02424   uint h = abs(dy) + TILE_SIZE;
02425 
02426   if (method & ~(VPM_RAILDIRS | VPM_SIGNALDIRS)) {
02427     /* We 'force' a selection direction; first four rail buttons. */
02428     method &= ~(VPM_RAILDIRS | VPM_SIGNALDIRS);
02429     int raw_dx = _thd.selstart.x - _thd.selend.x;
02430     int raw_dy = _thd.selstart.y - _thd.selend.y;
02431     switch (method) {
02432       case VPM_FIX_X:
02433         b = HT_LINE | HT_DIR_Y;
02434         x = _thd.selstart.x;
02435         break;
02436 
02437       case VPM_FIX_Y:
02438         b = HT_LINE | HT_DIR_X;
02439         y = _thd.selstart.y;
02440         break;
02441 
02442       case VPM_FIX_HORIZONTAL:
02443         if (dx == -dy) {
02444           /* We are on a straight horizontal line. Determine the 'rail'
02445            * to build based the sub tile location. */
02446           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
02447         } else {
02448           /* We are not on a straight line. Determine the rail to build
02449            * based on whether we are above or below it. */
02450           b = dx + dy >= (int)TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
02451 
02452           /* Calculate where a horizontal line through the start point and
02453            * a vertical line from the selected end point intersect and
02454            * use that point as the end point. */
02455           int offset = (raw_dx - raw_dy) / 2;
02456           x = _thd.selstart.x - (offset & ~TILE_UNIT_MASK);
02457           y = _thd.selstart.y + (offset & ~TILE_UNIT_MASK);
02458 
02459           /* 'Build' the last half rail tile if needed */
02460           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
02461             if (dx + dy >= (int)TILE_SIZE) {
02462               x += (dx + dy < 0) ? (int)TILE_SIZE : -(int)TILE_SIZE;
02463             } else {
02464               y += (dx + dy < 0) ? (int)TILE_SIZE : -(int)TILE_SIZE;
02465             }
02466           }
02467 
02468           /* Make sure we do not overflow the map! */
02469           CheckUnderflow(x, y, 1);
02470           CheckUnderflow(y, x, 1);
02471           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, 1);
02472           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, 1);
02473           assert(x >= 0 && y >= 0 && x <= (int)(MapMaxX() * TILE_SIZE) && y <= (int)(MapMaxY() * TILE_SIZE));
02474         }
02475         break;
02476 
02477       case VPM_FIX_VERTICAL:
02478         if (dx == dy) {
02479           /* We are on a straight vertical line. Determine the 'rail'
02480            * to build based the sub tile location. */
02481           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02482         } else {
02483           /* We are not on a straight line. Determine the rail to build
02484            * based on whether we are left or right from it. */
02485           b = dx < dy ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02486 
02487           /* Calculate where a vertical line through the start point and
02488            * a horizontal line from the selected end point intersect and
02489            * use that point as the end point. */
02490           int offset = (raw_dx + raw_dy + (int)TILE_SIZE) / 2;
02491           x = _thd.selstart.x - (offset & ~TILE_UNIT_MASK);
02492           y = _thd.selstart.y - (offset & ~TILE_UNIT_MASK);
02493 
02494           /* 'Build' the last half rail tile if needed */
02495           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
02496             if (dx - dy < 0) {
02497               y += (dx > dy) ? (int)TILE_SIZE : -(int)TILE_SIZE;
02498             } else {
02499               x += (dx < dy) ? (int)TILE_SIZE : -(int)TILE_SIZE;
02500             }
02501           }
02502 
02503           /* Make sure we do not overflow the map! */
02504           CheckUnderflow(x, y, -1);
02505           CheckUnderflow(y, x, -1);
02506           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, -1);
02507           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, -1);
02508           assert(x >= 0 && y >= 0 && x <= (int)(MapMaxX() * TILE_SIZE) && y <= (int)(MapMaxY() * TILE_SIZE));
02509         }
02510         break;
02511 
02512       default:
02513         NOT_REACHED();
02514     }
02515   } else if (TileVirtXY(_thd.selstart.x, _thd.selstart.y) == TileVirtXY(x, y)) { // check if we're only within one tile
02516     if (method & VPM_RAILDIRS) {
02517       b = GetAutorailHT(x, y);
02518     } else { // rect for autosignals on one tile
02519       b = HT_RECT;
02520     }
02521   } else if (h == TILE_SIZE) { // Is this in X direction?
02522     if (dx == (int)TILE_SIZE) { // 2x1 special handling
02523       b = (Check2x1AutoRail(3)) | HT_LINE;
02524     } else if (dx == -(int)TILE_SIZE) {
02525       b = (Check2x1AutoRail(2)) | HT_LINE;
02526     } else {
02527       b = HT_LINE | HT_DIR_X;
02528     }
02529     y = _thd.selstart.y;
02530   } else if (w == TILE_SIZE) { // Or Y direction?
02531     if (dy == (int)TILE_SIZE) { // 2x1 special handling
02532       b = (Check2x1AutoRail(1)) | HT_LINE;
02533     } else if (dy == -(int)TILE_SIZE) { // 2x1 other direction
02534       b = (Check2x1AutoRail(0)) | HT_LINE;
02535     } else {
02536       b = HT_LINE | HT_DIR_Y;
02537     }
02538     x = _thd.selstart.x;
02539   } else if (w > h * 2) { // still count as x dir?
02540     b = HT_LINE | HT_DIR_X;
02541     y = _thd.selstart.y;
02542   } else if (h > w * 2) { // still count as y dir?
02543     b = HT_LINE | HT_DIR_Y;
02544     x = _thd.selstart.x;
02545   } else { // complicated direction
02546     int d = w - h;
02547     _thd.selend.x = _thd.selend.x & ~TILE_UNIT_MASK;
02548     _thd.selend.y = _thd.selend.y & ~TILE_UNIT_MASK;
02549 
02550     /* four cases. */
02551     if (x > _thd.selstart.x) {
02552       if (y > _thd.selstart.y) {
02553         /* south */
02554         if (d == 0) {
02555           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02556         } else if (d >= 0) {
02557           x = _thd.selstart.x + h;
02558           b = HT_LINE | HT_DIR_VL;
02559         } else {
02560           y = _thd.selstart.y + w;
02561           b = HT_LINE | HT_DIR_VR;
02562         }
02563       } else {
02564         /* west */
02565         if (d == 0) {
02566           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
02567         } else if (d >= 0) {
02568           x = _thd.selstart.x + h;
02569           b = HT_LINE | HT_DIR_HL;
02570         } else {
02571           y = _thd.selstart.y - w;
02572           b = HT_LINE | HT_DIR_HU;
02573         }
02574       }
02575     } else {
02576       if (y > _thd.selstart.y) {
02577         /* east */
02578         if (d == 0) {
02579           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
02580         } else if (d >= 0) {
02581           x = _thd.selstart.x - h;
02582           b = HT_LINE | HT_DIR_HU;
02583         } else {
02584           y = _thd.selstart.y + w;
02585           b = HT_LINE | HT_DIR_HL;
02586         }
02587       } else {
02588         /* north */
02589         if (d == 0) {
02590           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02591         } else if (d >= 0) {
02592           x = _thd.selstart.x - h;
02593           b = HT_LINE | HT_DIR_VR;
02594         } else {
02595           y = _thd.selstart.y - w;
02596           b = HT_LINE | HT_DIR_VL;
02597         }
02598       }
02599     }
02600   }
02601 
02602   if (_settings_client.gui.measure_tooltip) {
02603     TileIndex t0 = TileVirtXY(_thd.selstart.x, _thd.selstart.y);
02604     TileIndex t1 = TileVirtXY(x, y);
02605     uint distance = DistanceManhattan(t0, t1) + 1;
02606     byte index = 0;
02607     uint64 params[2];
02608 
02609     if (distance != 1) {
02610       int heightdiff = CalcHeightdiff(b, distance, t0, t1);
02611       /* If we are showing a tooltip for horizontal or vertical drags,
02612        * 2 tiles have a length of 1. To bias towards the ceiling we add
02613        * one before division. It feels more natural to count 3 lengths as 2 */
02614       if ((b & HT_DIR_MASK) != HT_DIR_X && (b & HT_DIR_MASK) != HT_DIR_Y) {
02615         distance = CeilDiv(distance, 2);
02616       }
02617 
02618       params[index++] = distance;
02619       if (heightdiff != 0) params[index++] = heightdiff;
02620     }
02621 
02622     ShowMeasurementTooltips(measure_strings_length[index], index, params);
02623   }
02624 
02625   _thd.selend.x = x;
02626   _thd.selend.y = y;
02627   _thd.next_drawstyle = b;
02628 }
02629 
02637 void VpSelectTilesWithMethod(int x, int y, ViewportPlaceMethod method)
02638 {
02639   int sx, sy;
02640   HighLightStyle style;
02641 
02642   if (x == -1) {
02643     _thd.selend.x = -1;
02644     return;
02645   }
02646 
02647   /* Special handling of drag in any (8-way) direction */
02648   if (method & (VPM_RAILDIRS | VPM_SIGNALDIRS)) {
02649     _thd.selend.x = x;
02650     _thd.selend.y = y;
02651     CalcRaildirsDrawstyle(x, y, method);
02652     return;
02653   }
02654 
02655   /* Needed so level-land is placed correctly */
02656   if ((_thd.next_drawstyle & HT_DRAG_MASK) == HT_POINT) {
02657     x += TILE_SIZE / 2;
02658     y += TILE_SIZE / 2;
02659   }
02660 
02661   sx = _thd.selstart.x;
02662   sy = _thd.selstart.y;
02663 
02664   int limit = 0;
02665 
02666   switch (method) {
02667     case VPM_X_OR_Y: // drag in X or Y direction
02668       if (abs(sy - y) < abs(sx - x)) {
02669         y = sy;
02670         style = HT_DIR_X;
02671       } else {
02672         x = sx;
02673         style = HT_DIR_Y;
02674       }
02675       goto calc_heightdiff_single_direction;
02676 
02677     case VPM_X_LIMITED: // Drag in X direction (limited size).
02678       limit = (_thd.sizelimit - 1) * TILE_SIZE;
02679       /* FALL THROUGH */
02680 
02681     case VPM_FIX_X: // drag in Y direction
02682       x = sx;
02683       style = HT_DIR_Y;
02684       goto calc_heightdiff_single_direction;
02685 
02686     case VPM_Y_LIMITED: // Drag in Y direction (limited size).
02687       limit = (_thd.sizelimit - 1) * TILE_SIZE;
02688       /* FALL THROUGH */
02689 
02690     case VPM_FIX_Y: // drag in X direction
02691       y = sy;
02692       style = HT_DIR_X;
02693 
02694 calc_heightdiff_single_direction:;
02695       if (limit > 0) {
02696         x = sx + Clamp(x - sx, -limit, limit);
02697         y = sy + Clamp(y - sy, -limit, limit);
02698       }
02699       if (_settings_client.gui.measure_tooltip) {
02700         TileIndex t0 = TileVirtXY(sx, sy);
02701         TileIndex t1 = TileVirtXY(x, y);
02702         uint distance = DistanceManhattan(t0, t1) + 1;
02703         byte index = 0;
02704         uint64 params[2];
02705 
02706         if (distance != 1) {
02707           /* With current code passing a HT_LINE style to calculate the height
02708            * difference is enough. However if/when a point-tool is created
02709            * with this method, function should be called with new_style (below)
02710            * instead of HT_LINE | style case HT_POINT is handled specially
02711            * new_style := (_thd.next_drawstyle & HT_RECT) ? HT_LINE | style : _thd.next_drawstyle; */
02712           int heightdiff = CalcHeightdiff(HT_LINE | style, 0, t0, t1);
02713 
02714           params[index++] = distance;
02715           if (heightdiff != 0) params[index++] = heightdiff;
02716         }
02717 
02718         ShowMeasurementTooltips(measure_strings_length[index], index, params);
02719       }
02720       break;
02721 
02722     case VPM_X_AND_Y_LIMITED: // Drag an X by Y constrained rect area.
02723       limit = (_thd.sizelimit - 1) * TILE_SIZE;
02724       x = sx + Clamp(x - sx, -limit, limit);
02725       y = sy + Clamp(y - sy, -limit, limit);
02726       /* FALL THROUGH */
02727 
02728     case VPM_X_AND_Y: // drag an X by Y area
02729       if (_settings_client.gui.measure_tooltip) {
02730         static const StringID measure_strings_area[] = {
02731           STR_NULL, STR_NULL, STR_MEASURE_AREA, STR_MEASURE_AREA_HEIGHTDIFF
02732         };
02733 
02734         TileIndex t0 = TileVirtXY(sx, sy);
02735         TileIndex t1 = TileVirtXY(x, y);
02736         uint dx = Delta(TileX(t0), TileX(t1)) + 1;
02737         uint dy = Delta(TileY(t0), TileY(t1)) + 1;
02738         byte index = 0;
02739         uint64 params[3];
02740 
02741         /* If dragging an area (eg dynamite tool) and it is actually a single
02742          * row/column, change the type to 'line' to get proper calculation for height */
02743         style = (HighLightStyle)_thd.next_drawstyle;
02744         if (_thd.IsDraggingDiagonal()) {
02745           /* Determine the "area" of the diagonal dragged selection.
02746            * We assume the area is the number of tiles along the X
02747            * edge and the number of tiles along the Y edge. However,
02748            * multiplying these two numbers does not give the exact
02749            * number of tiles; basically we are counting the black
02750            * squares on a chess board and ignore the white ones to
02751            * make the tile counts at the edges match up. There is no
02752            * other way to make a proper count though.
02753            *
02754            * First convert to the rotated coordinate system. */
02755           int dist_x = TileX(t0) - TileX(t1);
02756           int dist_y = TileY(t0) - TileY(t1);
02757           int a_max = dist_x + dist_y;
02758           int b_max = dist_y - dist_x;
02759 
02760           /* Now determine the size along the edge, but due to the
02761            * chess board principle this counts double. */
02762           a_max = abs(a_max + (a_max > 0 ? 2 : -2)) / 2;
02763           b_max = abs(b_max + (b_max > 0 ? 2 : -2)) / 2;
02764 
02765           /* We get a 1x1 on normal 2x1 rectangles, due to it being
02766            * a seen as two sides. As the result for actual building
02767            * will be the same as non-diagonal dragging revert to that
02768            * behaviour to give it a more normally looking size. */
02769           if (a_max != 1 || b_max != 1) {
02770             dx = a_max;
02771             dy = b_max;
02772           }
02773         } else if (style & HT_RECT) {
02774           if (dx == 1) {
02775             style = HT_LINE | HT_DIR_Y;
02776           } else if (dy == 1) {
02777             style = HT_LINE | HT_DIR_X;
02778           }
02779         }
02780 
02781         if (t0 != 1 || t1 != 1) {
02782           int heightdiff = CalcHeightdiff(style, 0, t0, t1);
02783 
02784           params[index++] = dx;
02785           params[index++] = dy;
02786           if (heightdiff != 0) params[index++] = heightdiff;
02787         }
02788 
02789         ShowMeasurementTooltips(measure_strings_area[index], index, params);
02790       }
02791       break;
02792 
02793     default: NOT_REACHED();
02794   }
02795 
02796   _thd.selend.x = x;
02797   _thd.selend.y = y;
02798 }
02799 
02804 EventState VpHandlePlaceSizingDrag()
02805 {
02806   if (_special_mouse_mode != WSM_SIZING) return ES_NOT_HANDLED;
02807 
02808   /* stop drag mode if the window has been closed */
02809   Window *w = _thd.GetCallbackWnd();
02810   if (w == NULL) {
02811     ResetObjectToPlace();
02812     return ES_HANDLED;
02813   }
02814 
02815   /* while dragging execute the drag procedure of the corresponding window (mostly VpSelectTilesWithMethod() ) */
02816   if (_left_button_down) {
02817     w->OnPlaceDrag(_thd.select_method, _thd.select_proc, GetTileBelowCursor());
02818     return ES_HANDLED;
02819   }
02820 
02821   /* mouse button released..
02822    * keep the selected tool, but reset it to the original mode. */
02823   _special_mouse_mode = WSM_NONE;
02824   HighLightStyle others = _thd.place_mode & ~(HT_DRAG_MASK | HT_DIR_MASK);
02825   if ((_thd.next_drawstyle & HT_DRAG_MASK) == HT_RECT) {
02826     _thd.place_mode = HT_RECT | others;
02827   } else if (_thd.select_method & VPM_SIGNALDIRS) {
02828     _thd.place_mode = HT_RECT | others;
02829   } else if (_thd.select_method & VPM_RAILDIRS) {
02830     _thd.place_mode = (_thd.select_method & ~VPM_RAILDIRS) ? _thd.next_drawstyle : (HT_RAIL | others);
02831   } else {
02832     _thd.place_mode = HT_POINT | others;
02833   }
02834   SetTileSelectSize(1, 1);
02835 
02836   w->OnPlaceMouseUp(_thd.select_method, _thd.select_proc, _thd.selend, TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y));
02837 
02838   return ES_HANDLED;
02839 }
02840 
02841 void SetObjectToPlaceWnd(CursorID icon, PaletteID pal, HighLightStyle mode, Window *w)
02842 {
02843   SetObjectToPlace(icon, pal, mode, w->window_class, w->window_number);
02844 }
02845 
02846 #include "table/animcursors.h"
02847 
02848 void SetObjectToPlace(CursorID icon, PaletteID pal, HighLightStyle mode, WindowClass window_class, WindowNumber window_num)
02849 {
02850   if (_thd.window_class != WC_INVALID) {
02851     /* Undo clicking on button and drag & drop */
02852     Window *w = _thd.GetCallbackWnd();
02853     /* Call the abort function, but set the window class to something
02854      * that will never be used to avoid infinite loops. Setting it to
02855      * the 'next' window class must not be done because recursion into
02856      * this function might in some cases reset the newly set object to
02857      * place or not properly reset the original selection. */
02858     _thd.window_class = WC_INVALID;
02859     if (w != NULL) w->OnPlaceObjectAbort();
02860   }
02861 
02862   SetTileSelectSize(1, 1);
02863 
02864   _thd.make_square_red = false;
02865 
02866   if (mode == HT_DRAG) { // HT_DRAG is for dragdropping trains in the depot window
02867     mode = HT_NONE;
02868     _special_mouse_mode = WSM_DRAGDROP;
02869   } else {
02870     _special_mouse_mode = WSM_NONE;
02871   }
02872 
02873   _thd.place_mode = mode;
02874   _thd.window_class = window_class;
02875   _thd.window_number = window_num;
02876 
02877   if ((mode & HT_DRAG_MASK) == HT_SPECIAL) { // special tools, like tunnels or docks start with presizing mode
02878     VpStartPreSizing();
02879   }
02880 
02881   if ((icon & ANIMCURSOR_FLAG) != 0) {
02882     SetAnimatedMouseCursor(_animcursors[icon & ~ANIMCURSOR_FLAG]);
02883   } else {
02884     SetMouseCursor(icon, pal);
02885   }
02886 
02887 }
02888 
02889 void ResetObjectToPlace()
02890 {
02891   SetObjectToPlace(SPR_CURSOR_MOUSE, PAL_NONE, HT_NONE, WC_MAIN_WINDOW, 0);
02892 }

Generated on Sun May 15 19:20:18 2011 for OpenTTD by  doxygen 1.6.1