viewport.cpp

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00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00028 #include "stdafx.h"
00029 #include "openttd.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 "variables.h"
00038 #include "vehicle_base.h"
00039 #include "vehicle_gui.h"
00040 #include "blitter/factory.hpp"
00041 #include "transparency.h"
00042 #include "strings_func.h"
00043 #include "zoom_func.h"
00044 #include "vehicle_func.h"
00045 #include "company_func.h"
00046 #include "waypoint_func.h"
00047 #include "window_func.h"
00048 #include "tilehighlight_func.h"
00049 #include "window_gui.h"
00050 
00051 #include "table/sprites.h"
00052 #include "table/strings.h"
00053 
00054 PlaceProc *_place_proc;
00055 Point _tile_fract_coords;
00056 
00057 struct StringSpriteToDraw {
00058   StringID string;
00059   Colours colour;
00060   int32 x;
00061   int32 y;
00062   uint64 params[2];
00063   uint16 width;
00064 };
00065 
00066 struct TileSpriteToDraw {
00067   SpriteID image;
00068   SpriteID pal;
00069   const SubSprite *sub;           
00070   int32 x;                        
00071   int32 y;                        
00072 };
00073 
00074 struct ChildScreenSpriteToDraw {
00075   SpriteID image;
00076   SpriteID pal;
00077   const SubSprite *sub;           
00078   int32 x;
00079   int32 y;
00080   int next;                       
00081 };
00082 
00084 struct ParentSpriteToDraw {
00085   SpriteID image;                 
00086   SpriteID pal;                   
00087   const SubSprite *sub;           
00088 
00089   int32 x;                        
00090   int32 y;                        
00091 
00092   int32 left;                     
00093   int32 top;                      
00094 
00095   int32 xmin;                     
00096   int32 xmax;                     
00097   int32 ymin;                     
00098   int32 ymax;                     
00099   int zmin;                       
00100   int zmax;                       
00101 
00102   int first_child;                
00103   bool comparison_done;           
00104 };
00105 
00107 enum FoundationPart {
00108   FOUNDATION_PART_NONE     = 0xFF,  
00109   FOUNDATION_PART_NORMAL   = 0,     
00110   FOUNDATION_PART_HALFTILE = 1,     
00111   FOUNDATION_PART_END
00112 };
00113 
00117 enum SpriteCombineMode {
00118   SPRITE_COMBINE_NONE,     
00119   SPRITE_COMBINE_PENDING,  
00120   SPRITE_COMBINE_ACTIVE,   
00121 };
00122 
00123 typedef SmallVector<TileSpriteToDraw, 64> TileSpriteToDrawVector;
00124 typedef SmallVector<StringSpriteToDraw, 4> StringSpriteToDrawVector;
00125 typedef SmallVector<ParentSpriteToDraw, 64> ParentSpriteToDrawVector;
00126 typedef SmallVector<ParentSpriteToDraw*, 64> ParentSpriteToSortVector;
00127 typedef SmallVector<ChildScreenSpriteToDraw, 16> ChildScreenSpriteToDrawVector;
00128 
00130 struct ViewportDrawer {
00131   DrawPixelInfo dpi;
00132 
00133   StringSpriteToDrawVector string_sprites_to_draw;
00134   TileSpriteToDrawVector tile_sprites_to_draw;
00135   ParentSpriteToDrawVector parent_sprites_to_draw;
00136   ParentSpriteToSortVector parent_sprites_to_sort; 
00137   ChildScreenSpriteToDrawVector child_screen_sprites_to_draw;
00138 
00139   int *last_child;
00140 
00141   SpriteCombineMode combine_sprites;               
00142 
00143   int foundation[FOUNDATION_PART_END];             
00144   FoundationPart foundation_part;                  
00145   int *last_foundation_child[FOUNDATION_PART_END]; 
00146   Point foundation_offset[FOUNDATION_PART_END];    
00147 };
00148 
00149 static ViewportDrawer _vd;
00150 
00151 TileHighlightData _thd;
00152 static TileInfo *_cur_ti;
00153 bool _draw_bounding_boxes = false;
00154 
00155 static Point MapXYZToViewport(const ViewPort *vp, int x, int y, int z)
00156 {
00157   Point p = RemapCoords(x, y, z);
00158   p.x -= vp->virtual_width / 2;
00159   p.y -= vp->virtual_height / 2;
00160   return p;
00161 }
00162 
00163 void DeleteWindowViewport(Window *w)
00164 {
00165   free(w->viewport);
00166   w->viewport = NULL;
00167 }
00168 
00181 void InitializeWindowViewport(Window *w, int x, int y,
00182   int width, int height, uint32 follow_flags, ZoomLevel zoom)
00183 {
00184   assert(w->viewport == NULL);
00185 
00186   ViewportData *vp = CallocT<ViewportData>(1);
00187 
00188   vp->left = x + w->left;
00189   vp->top = y + w->top;
00190   vp->width = width;
00191   vp->height = height;
00192 
00193   vp->zoom = zoom;
00194 
00195   vp->virtual_width = ScaleByZoom(width, zoom);
00196   vp->virtual_height = ScaleByZoom(height, zoom);
00197 
00198   Point pt;
00199 
00200   if (follow_flags & 0x80000000) {
00201     const Vehicle *veh;
00202 
00203     vp->follow_vehicle = (VehicleID)(follow_flags & 0xFFFF);
00204     veh = Vehicle::Get(vp->follow_vehicle);
00205     pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
00206   } else {
00207     uint x = TileX(follow_flags) * TILE_SIZE;
00208     uint y = TileY(follow_flags) * TILE_SIZE;
00209 
00210     vp->follow_vehicle = INVALID_VEHICLE;
00211     pt = MapXYZToViewport(vp, x, y, GetSlopeZ(x, y));
00212   }
00213 
00214   vp->scrollpos_x = pt.x;
00215   vp->scrollpos_y = pt.y;
00216   vp->dest_scrollpos_x = pt.x;
00217   vp->dest_scrollpos_y = pt.y;
00218 
00219   w->viewport = vp;
00220   vp->virtual_left = 0;//pt.x;
00221   vp->virtual_top = 0;//pt.y;
00222 }
00223 
00224 static Point _vp_move_offs;
00225 
00226 static void DoSetViewportPosition(const Window *w, int left, int top, int width, int height)
00227 {
00228   FOR_ALL_WINDOWS_FROM_BACK_FROM(w, w) {
00229     if (left + width > w->left &&
00230         w->left + w->width > left &&
00231         top + height > w->top &&
00232         w->top + w->height > top) {
00233 
00234       if (left < w->left) {
00235         DoSetViewportPosition(w, left, top, w->left - left, height);
00236         DoSetViewportPosition(w, left + (w->left - left), top, width - (w->left - left), height);
00237         return;
00238       }
00239 
00240       if (left + width > w->left + w->width) {
00241         DoSetViewportPosition(w, left, top, (w->left + w->width - left), height);
00242         DoSetViewportPosition(w, left + (w->left + w->width - left), top, width - (w->left + w->width - left), height);
00243         return;
00244       }
00245 
00246       if (top < w->top) {
00247         DoSetViewportPosition(w, left, top, width, (w->top - top));
00248         DoSetViewportPosition(w, left, top + (w->top - top), width, height - (w->top - top));
00249         return;
00250       }
00251 
00252       if (top + height > w->top + w->height) {
00253         DoSetViewportPosition(w, left, top, width, (w->top + w->height - top));
00254         DoSetViewportPosition(w, left, top + (w->top + w->height - top), width, height - (w->top + w->height - top));
00255         return;
00256       }
00257 
00258       return;
00259     }
00260   }
00261 
00262   {
00263     int xo = _vp_move_offs.x;
00264     int yo = _vp_move_offs.y;
00265 
00266     if (abs(xo) >= width || abs(yo) >= height) {
00267       /* fully_outside */
00268       RedrawScreenRect(left, top, left + width, top + height);
00269       return;
00270     }
00271 
00272     GfxScroll(left, top, width, height, xo, yo);
00273 
00274     if (xo > 0) {
00275       RedrawScreenRect(left, top, xo + left, top + height);
00276       left += xo;
00277       width -= xo;
00278     } else if (xo < 0) {
00279       RedrawScreenRect(left + width + xo, top, left + width, top + height);
00280       width += xo;
00281     }
00282 
00283     if (yo > 0) {
00284       RedrawScreenRect(left, top, width + left, top + yo);
00285     } else if (yo < 0) {
00286       RedrawScreenRect(left, top + height + yo, width + left, top + height);
00287     }
00288   }
00289 }
00290 
00291 static void SetViewportPosition(Window *w, int x, int y)
00292 {
00293   ViewPort *vp = w->viewport;
00294   int old_left = vp->virtual_left;
00295   int old_top = vp->virtual_top;
00296   int i;
00297   int left, top, width, height;
00298 
00299   vp->virtual_left = x;
00300   vp->virtual_top = y;
00301 
00302   /* viewport is bound to its left top corner, so it must be rounded down (UnScaleByZoomLower)
00303    * else glitch described in FS#1412 will happen (offset by 1 pixel with zoom level > NORMAL)
00304    */
00305   old_left = UnScaleByZoomLower(old_left, vp->zoom);
00306   old_top = UnScaleByZoomLower(old_top, vp->zoom);
00307   x = UnScaleByZoomLower(x, vp->zoom);
00308   y = UnScaleByZoomLower(y, vp->zoom);
00309 
00310   old_left -= x;
00311   old_top -= y;
00312 
00313   if (old_top == 0 && old_left == 0) return;
00314 
00315   _vp_move_offs.x = old_left;
00316   _vp_move_offs.y = old_top;
00317 
00318   left = vp->left;
00319   top = vp->top;
00320   width = vp->width;
00321   height = vp->height;
00322 
00323   if (left < 0) {
00324     width += left;
00325     left = 0;
00326   }
00327 
00328   i = left + width - _screen.width;
00329   if (i >= 0) width -= i;
00330 
00331   if (width > 0) {
00332     if (top < 0) {
00333       height += top;
00334       top = 0;
00335     }
00336 
00337     i = top + height - _screen.height;
00338     if (i >= 0) height -= i;
00339 
00340     if (height > 0) DoSetViewportPosition(w->z_front, left, top, width, height);
00341   }
00342 }
00343 
00352 ViewPort *IsPtInWindowViewport(const Window *w, int x, int y)
00353 {
00354   ViewPort *vp = w->viewport;
00355 
00356   if (vp != NULL &&
00357       IsInsideMM(x, vp->left, vp->left + vp->width) &&
00358       IsInsideMM(y, vp->top, vp->top + vp->height))
00359     return vp;
00360 
00361   return NULL;
00362 }
00363 
00370 static Point TranslateXYToTileCoord(const ViewPort *vp, int x, int y)
00371 {
00372   Point pt;
00373   int a, b;
00374   uint z;
00375 
00376   if ( (uint)(x -= vp->left) >= (uint)vp->width ||
00377         (uint)(y -= vp->top) >= (uint)vp->height) {
00378         Point pt = {-1, -1};
00379         return pt;
00380   }
00381 
00382   x = (ScaleByZoom(x, vp->zoom) + vp->virtual_left) >> 2;
00383   y = (ScaleByZoom(y, vp->zoom) + vp->virtual_top) >> 1;
00384 
00385   a = y - x;
00386   b = y + x;
00387 
00388   /* we need to move variables in to the valid range, as the
00389    * GetTileZoomCenterWindow() function can call here with invalid x and/or y,
00390    * when the user tries to zoom out along the sides of the map */
00391   a = Clamp(a, -4 * TILE_SIZE, (int)(MapMaxX() * TILE_SIZE) - 1);
00392   b = Clamp(b, -4 * TILE_SIZE, (int)(MapMaxY() * TILE_SIZE) - 1);
00393 
00394   /* (a, b) is the X/Y-world coordinate that belongs to (x,y) if the landscape would be completely flat on height 0.
00395    * Now find the Z-world coordinate by fix point iteration.
00396    * This is a bit tricky because the tile height is non-continuous at foundations.
00397    * The clicked point should be approached from the back, otherwise there are regions that are not clickable.
00398    * (FOUNDATION_HALFTILE_LOWER on SLOPE_STEEP_S hides north halftile completely)
00399    * So give it a z-malus of 4 in the first iterations.
00400    */
00401   z = 0;
00402 
00403   int min_coord = _settings_game.construction.freeform_edges ? TILE_SIZE : 0;
00404 
00405   for (int i = 0; i < 5; i++) z = GetSlopeZ(Clamp(a + (int)max(z, 4u) - 4, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + (int)max(z, 4u) - 4, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
00406   for (uint malus = 3; malus > 0; malus--) z = GetSlopeZ(Clamp(a + (int)max(z, malus) - (int)malus, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + (int)max(z, malus) - (int)malus, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
00407   for (int i = 0; i < 5; i++) z = GetSlopeZ(Clamp(a + (int)z, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + (int)z, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
00408 
00409   pt.x = Clamp(a + (int)z, min_coord, MapMaxX() * TILE_SIZE - 1);
00410   pt.y = Clamp(b + (int)z, min_coord, MapMaxY() * TILE_SIZE - 1);
00411 
00412   return pt;
00413 }
00414 
00415 /* When used for zooming, check area below current coordinates (x,y)
00416  * and return the tile of the zoomed out/in position (zoom_x, zoom_y)
00417  * when you just want the tile, make x = zoom_x and y = zoom_y */
00418 static Point GetTileFromScreenXY(int x, int y, int zoom_x, int zoom_y)
00419 {
00420   Window *w;
00421   ViewPort *vp;
00422   Point pt;
00423 
00424   if ( (w = FindWindowFromPt(x, y)) != NULL &&
00425        (vp = IsPtInWindowViewport(w, x, y)) != NULL)
00426         return TranslateXYToTileCoord(vp, zoom_x, zoom_y);
00427 
00428   pt.y = pt.x = -1;
00429   return pt;
00430 }
00431 
00432 Point GetTileBelowCursor()
00433 {
00434   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, _cursor.pos.x, _cursor.pos.y);
00435 }
00436 
00437 
00438 Point GetTileZoomCenterWindow(bool in, Window * w)
00439 {
00440   int x, y;
00441   ViewPort *vp = w->viewport;
00442 
00443   if (in) {
00444     x = ((_cursor.pos.x - vp->left) >> 1) + (vp->width >> 2);
00445     y = ((_cursor.pos.y - vp->top) >> 1) + (vp->height >> 2);
00446   } else {
00447     x = vp->width - (_cursor.pos.x - vp->left);
00448     y = vp->height - (_cursor.pos.y - vp->top);
00449   }
00450   /* Get the tile below the cursor and center on the zoomed-out center */
00451   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, x + vp->left, y + vp->top);
00452 }
00453 
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 
00482 void DrawGroundSpriteAt(SpriteID image, SpriteID pal, int32 x, int32 y, byte z, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
00483 {
00484   assert((image & SPRITE_MASK) < MAX_SPRITES);
00485 
00486   TileSpriteToDraw *ts = _vd.tile_sprites_to_draw.Append();
00487   ts->image = image;
00488   ts->pal = pal;
00489   ts->sub = sub;
00490   Point pt = RemapCoords(x, y, z);
00491   ts->x = pt.x + extra_offs_x;
00492   ts->y = pt.y + extra_offs_y;
00493 }
00494 
00507 static void AddChildSpriteToFoundation(SpriteID image, SpriteID pal, const SubSprite *sub, FoundationPart foundation_part, int extra_offs_x, int extra_offs_y)
00508 {
00509   assert(IsInsideMM(foundation_part, 0, FOUNDATION_PART_END));
00510   assert(_vd.foundation[foundation_part] != -1);
00511   Point offs = _vd.foundation_offset[foundation_part];
00512 
00513   /* Change the active ChildSprite list to the one of the foundation */
00514   int *old_child = _vd.last_child;
00515   _vd.last_child = _vd.last_foundation_child[foundation_part];
00516 
00517   AddChildSpriteScreen(image, pal, offs.x + extra_offs_x, offs.y + extra_offs_y, false, sub);
00518 
00519   /* Switch back to last ChildSprite list */
00520   _vd.last_child = old_child;
00521 }
00522 
00533 void DrawGroundSprite(SpriteID image, SpriteID pal, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
00534 {
00535   /* Switch to first foundation part, if no foundation was drawn */
00536   if (_vd.foundation_part == FOUNDATION_PART_NONE) _vd.foundation_part = FOUNDATION_PART_NORMAL;
00537 
00538   if (_vd.foundation[_vd.foundation_part] != -1) {
00539     AddChildSpriteToFoundation(image, pal, sub, _vd.foundation_part, extra_offs_x, extra_offs_y);
00540   } else {
00541     DrawGroundSpriteAt(image, pal, _cur_ti->x, _cur_ti->y, _cur_ti->z, sub, extra_offs_x, extra_offs_y);
00542   }
00543 }
00544 
00545 
00553 void OffsetGroundSprite(int x, int y)
00554 {
00555   /* Switch to next foundation part */
00556   switch (_vd.foundation_part) {
00557     case FOUNDATION_PART_NONE:
00558       _vd.foundation_part = FOUNDATION_PART_NORMAL;
00559       break;
00560     case FOUNDATION_PART_NORMAL:
00561       _vd.foundation_part = FOUNDATION_PART_HALFTILE;
00562       break;
00563     default: NOT_REACHED();
00564   }
00565 
00566   /* _vd.last_child == NULL if foundation sprite was clipped by the viewport bounds */
00567   if (_vd.last_child != NULL) _vd.foundation[_vd.foundation_part] = _vd.parent_sprites_to_draw.Length() - 1;
00568 
00569   _vd.foundation_offset[_vd.foundation_part].x = x;
00570   _vd.foundation_offset[_vd.foundation_part].y = y;
00571   _vd.last_foundation_child[_vd.foundation_part] = _vd.last_child;
00572 }
00573 
00585 static void AddCombinedSprite(SpriteID image, SpriteID pal, int x, int y, byte z, const SubSprite *sub)
00586 {
00587   Point pt = RemapCoords(x, y, z);
00588   const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
00589 
00590   if (pt.x + spr->x_offs >= _vd.dpi.left + _vd.dpi.width ||
00591       pt.x + spr->x_offs + spr->width <= _vd.dpi.left ||
00592       pt.y + spr->y_offs >= _vd.dpi.top + _vd.dpi.height ||
00593       pt.y + spr->y_offs + spr->height <= _vd.dpi.top)
00594     return;
00595 
00596   const ParentSpriteToDraw *pstd = _vd.parent_sprites_to_draw.End() - 1;
00597   AddChildSpriteScreen(image, pal, pt.x - pstd->left, pt.y - pstd->top, false, sub);
00598 }
00599 
00624 void AddSortableSpriteToDraw(SpriteID image, SpriteID 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)
00625 {
00626   int32 left, right, top, bottom;
00627 
00628   assert((image & SPRITE_MASK) < MAX_SPRITES);
00629 
00630   /* make the sprites transparent with the right palette */
00631   if (transparent) {
00632     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
00633     pal = PALETTE_TO_TRANSPARENT;
00634   }
00635 
00636   if (_vd.combine_sprites == SPRITE_COMBINE_ACTIVE) {
00637     AddCombinedSprite(image, pal, x, y, z, sub);
00638     return;
00639   }
00640 
00641   _vd.last_child = NULL;
00642 
00643   Point pt = RemapCoords(x, y, z);
00644   int tmp_left, tmp_top, tmp_x = pt.x, tmp_y = pt.y;
00645 
00646   /* Compute screen extents of sprite */
00647   if (image == SPR_EMPTY_BOUNDING_BOX) {
00648     left = tmp_left = RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x;
00649     right           = RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1;
00650     top  = tmp_top  = RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y;
00651     bottom          = RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1;
00652   } else {
00653     const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
00654     left = tmp_left = (pt.x += spr->x_offs);
00655     right           = (pt.x +  spr->width );
00656     top  = tmp_top  = (pt.y += spr->y_offs);
00657     bottom          = (pt.y +  spr->height);
00658   }
00659 
00660   if (_draw_bounding_boxes && (image != SPR_EMPTY_BOUNDING_BOX)) {
00661     /* Compute maximal extents of sprite and it's bounding box */
00662     left   = min(left  , RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x);
00663     right  = max(right , RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1);
00664     top    = min(top   , RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y);
00665     bottom = max(bottom, RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1);
00666   }
00667 
00668   /* Do not add the sprite to the viewport, if it is outside */
00669   if (left   >= _vd.dpi.left + _vd.dpi.width ||
00670       right  <= _vd.dpi.left                 ||
00671       top    >= _vd.dpi.top + _vd.dpi.height ||
00672       bottom <= _vd.dpi.top) {
00673     return;
00674   }
00675 
00676   ParentSpriteToDraw *ps = _vd.parent_sprites_to_draw.Append();
00677   ps->x = tmp_x;
00678   ps->y = tmp_y;
00679 
00680   ps->left = tmp_left;
00681   ps->top  = tmp_top;
00682 
00683   ps->image = image;
00684   ps->pal = pal;
00685   ps->sub = sub;
00686   ps->xmin = x + bb_offset_x;
00687   ps->xmax = x + max(bb_offset_x, w) - 1;
00688 
00689   ps->ymin = y + bb_offset_y;
00690   ps->ymax = y + max(bb_offset_y, h) - 1;
00691 
00692   ps->zmin = z + bb_offset_z;
00693   ps->zmax = z + max(bb_offset_z, dz) - 1;
00694 
00695   ps->comparison_done = false;
00696   ps->first_child = -1;
00697 
00698   _vd.last_child = &ps->first_child;
00699 
00700   if (_vd.combine_sprites == SPRITE_COMBINE_PENDING) _vd.combine_sprites = SPRITE_COMBINE_ACTIVE;
00701 }
00702 
00721 void StartSpriteCombine()
00722 {
00723   assert(_vd.combine_sprites == SPRITE_COMBINE_NONE);
00724   _vd.combine_sprites = SPRITE_COMBINE_PENDING;
00725 }
00726 
00731 void EndSpriteCombine()
00732 {
00733   assert(_vd.combine_sprites != SPRITE_COMBINE_NONE);
00734   _vd.combine_sprites = SPRITE_COMBINE_NONE;
00735 }
00736 
00747 void AddChildSpriteScreen(SpriteID image, SpriteID pal, int x, int y, bool transparent, const SubSprite *sub)
00748 {
00749   assert((image & SPRITE_MASK) < MAX_SPRITES);
00750 
00751   /* If the ParentSprite was clipped by the viewport bounds, do not draw the ChildSprites either */
00752   if (_vd.last_child == NULL) return;
00753 
00754   /* make the sprites transparent with the right palette */
00755   if (transparent) {
00756     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
00757     pal = PALETTE_TO_TRANSPARENT;
00758   }
00759 
00760   *_vd.last_child = _vd.child_screen_sprites_to_draw.Length();
00761 
00762   ChildScreenSpriteToDraw *cs = _vd.child_screen_sprites_to_draw.Append();
00763   cs->image = image;
00764   cs->pal = pal;
00765   cs->sub = sub;
00766   cs->x = x;
00767   cs->y = y;
00768   cs->next = -1;
00769 
00770   /* Append the sprite to the active ChildSprite list.
00771    * If the active ParentSprite is a foundation, update last_foundation_child as well.
00772    * Note: ChildSprites of foundations are NOT sequential in the vector, as selection sprites are added at last. */
00773   if (_vd.last_foundation_child[0] == _vd.last_child) _vd.last_foundation_child[0] = &cs->next;
00774   if (_vd.last_foundation_child[1] == _vd.last_child) _vd.last_foundation_child[1] = &cs->next;
00775   _vd.last_child = &cs->next;
00776 }
00777 
00778 static void AddStringToDraw(int x, int y, StringID string, uint64 params_1, uint64 params_2, Colours colour, uint16 width)
00779 {
00780   assert(width != 0);
00781   StringSpriteToDraw *ss = _vd.string_sprites_to_draw.Append();
00782   ss->string = string;
00783   ss->x = x;
00784   ss->y = y;
00785   ss->params[0] = params_1;
00786   ss->params[1] = params_2;
00787   ss->width = width;
00788   ss->colour = colour;
00789 }
00790 
00791 
00803 static void DrawSelectionSprite(SpriteID image, SpriteID pal, const TileInfo *ti, int z_offset, FoundationPart foundation_part)
00804 {
00805   /* FIXME: This is not totally valid for some autorail highlights, that extent over the edges of the tile. */
00806   if (_vd.foundation[foundation_part] == -1) {
00807     /* draw on real ground */
00808     DrawGroundSpriteAt(image, pal, ti->x, ti->y, ti->z + z_offset);
00809   } else {
00810     /* draw on top of foundation */
00811     AddChildSpriteToFoundation(image, pal, NULL, foundation_part, 0, -z_offset);
00812   }
00813 }
00814 
00821 static void DrawTileSelectionRect(const TileInfo *ti, SpriteID pal)
00822 {
00823   if (!IsValidTile(ti->tile)) return;
00824 
00825   SpriteID sel;
00826   if (IsHalftileSlope(ti->tileh)) {
00827     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
00828     SpriteID sel2 = SPR_HALFTILE_SELECTION_FLAT + halftile_corner;
00829     DrawSelectionSprite(sel2, pal, ti, 7 + TILE_HEIGHT, FOUNDATION_PART_HALFTILE);
00830 
00831     Corner opposite_corner = OppositeCorner(halftile_corner);
00832     if (IsSteepSlope(ti->tileh)) {
00833       sel = SPR_HALFTILE_SELECTION_DOWN;
00834     } else {
00835       sel = ((ti->tileh & SlopeWithOneCornerRaised(opposite_corner)) != 0 ? SPR_HALFTILE_SELECTION_UP : SPR_HALFTILE_SELECTION_FLAT);
00836     }
00837     sel += opposite_corner;
00838   } else {
00839     sel = SPR_SELECT_TILE + _tileh_to_sprite[ti->tileh];
00840   }
00841   DrawSelectionSprite(sel, pal, ti, 7, FOUNDATION_PART_NORMAL);
00842 }
00843 
00844 static bool IsPartOfAutoLine(int px, int py)
00845 {
00846   px -= _thd.selstart.x;
00847   py -= _thd.selstart.y;
00848 
00849   if ((_thd.drawstyle & ~HT_DIR_MASK) != HT_LINE) return false;
00850 
00851   switch (_thd.drawstyle & HT_DIR_MASK) {
00852     case HT_DIR_X:  return py == 0; // x direction
00853     case HT_DIR_Y:  return px == 0; // y direction
00854     case HT_DIR_HU: return px == -py || px == -py - 16; // horizontal upper
00855     case HT_DIR_HL: return px == -py || px == -py + 16; // horizontal lower
00856     case HT_DIR_VL: return px == py || px == py + 16; // vertival left
00857     case HT_DIR_VR: return px == py || px == py - 16; // vertical right
00858     default:
00859       NOT_REACHED();
00860   }
00861 }
00862 
00863 /* [direction][side] */
00864 static const HighLightStyle _autorail_type[6][2] = {
00865   { HT_DIR_X,  HT_DIR_X },
00866   { HT_DIR_Y,  HT_DIR_Y },
00867   { HT_DIR_HU, HT_DIR_HL },
00868   { HT_DIR_HL, HT_DIR_HU },
00869   { HT_DIR_VL, HT_DIR_VR },
00870   { HT_DIR_VR, HT_DIR_VL }
00871 };
00872 
00873 #include "table/autorail.h"
00874 
00881 static void DrawAutorailSelection(const TileInfo *ti, uint autorail_type)
00882 {
00883   SpriteID image;
00884   SpriteID pal;
00885   int offset;
00886 
00887   FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
00888   Slope autorail_tileh = RemoveHalftileSlope(ti->tileh);
00889   if (IsHalftileSlope(ti->tileh)) {
00890     static const uint _lower_rail[4] = { 5U, 2U, 4U, 3U };
00891     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
00892     if (autorail_type != _lower_rail[halftile_corner]) {
00893       foundation_part = FOUNDATION_PART_HALFTILE;
00894       /* Here we draw the highlights of the "three-corners-raised"-slope. That looks ok to me. */
00895       autorail_tileh = SlopeWithThreeCornersRaised(OppositeCorner(halftile_corner));
00896     }
00897   }
00898 
00899   offset = _AutorailTilehSprite[autorail_tileh][autorail_type];
00900   if (offset >= 0) {
00901     image = SPR_AUTORAIL_BASE + offset;
00902     pal = PAL_NONE;
00903   } else {
00904     image = SPR_AUTORAIL_BASE - offset;
00905     pal = PALETTE_SEL_TILE_RED;
00906   }
00907 
00908   DrawSelectionSprite(image, _thd.make_square_red ? PALETTE_SEL_TILE_RED : pal, ti, 7, foundation_part);
00909 }
00910 
00915 static void DrawTileSelection(const TileInfo *ti)
00916 {
00917   /* Draw a red error square? */
00918   bool is_redsq = _thd.redsq == ti->tile;
00919   if (is_redsq) DrawTileSelectionRect(ti, PALETTE_TILE_RED_PULSATING);
00920 
00921   /* no selection active? */
00922   if (_thd.drawstyle == 0) return;
00923 
00924   /* Inside the inner area? */
00925   if (IsInsideBS(ti->x, _thd.pos.x, _thd.size.x) &&
00926       IsInsideBS(ti->y, _thd.pos.y, _thd.size.y)) {
00927     if (_thd.drawstyle & HT_RECT) {
00928       if (!is_redsq) DrawTileSelectionRect(ti, _thd.make_square_red ? PALETTE_SEL_TILE_RED : PAL_NONE);
00929     } else if (_thd.drawstyle & HT_POINT) {
00930       /* Figure out the Z coordinate for the single dot. */
00931       byte z = 0;
00932       FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
00933       if (ti->tileh & SLOPE_N) {
00934         z += TILE_HEIGHT;
00935         if (RemoveHalftileSlope(ti->tileh) == SLOPE_STEEP_N) z += TILE_HEIGHT;
00936       }
00937       if (IsHalftileSlope(ti->tileh)) {
00938         Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
00939         if ((halftile_corner == CORNER_W) || (halftile_corner == CORNER_E)) z += TILE_HEIGHT;
00940         if (halftile_corner != CORNER_S) {
00941           foundation_part = FOUNDATION_PART_HALFTILE;
00942           if (IsSteepSlope(ti->tileh)) z -= TILE_HEIGHT;
00943         }
00944       }
00945       DrawSelectionSprite(_cur_dpi->zoom <= ZOOM_LVL_DETAIL ? SPR_DOT : SPR_DOT_SMALL, PAL_NONE, ti, z, foundation_part);
00946     } else if (_thd.drawstyle & HT_RAIL) {
00947       /* autorail highlight piece under cursor */
00948       HighLightStyle type = _thd.drawstyle & HT_DIR_MASK;
00949       assert(type < HT_DIR_END);
00950       DrawAutorailSelection(ti, _autorail_type[type][0]);
00951     } else if (IsPartOfAutoLine(ti->x, ti->y)) {
00952       /* autorail highlighting long line */
00953       HighLightStyle dir = _thd.drawstyle & HT_DIR_MASK;
00954       uint side;
00955 
00956       if (dir == HT_DIR_X || dir == HT_DIR_Y) {
00957         side = 0;
00958       } else {
00959         TileIndex start = TileVirtXY(_thd.selstart.x, _thd.selstart.y);
00960         side = Delta(Delta(TileX(start), TileX(ti->tile)), Delta(TileY(start), TileY(ti->tile)));
00961       }
00962 
00963       DrawAutorailSelection(ti, _autorail_type[dir][side]);
00964     }
00965     return;
00966   }
00967 
00968   /* Check if it's inside the outer area? */
00969   if (!is_redsq && _thd.outersize.x &&
00970       _thd.size.x < _thd.size.x + _thd.outersize.x &&
00971       IsInsideBS(ti->x, _thd.pos.x + _thd.offs.x, _thd.size.x + _thd.outersize.x) &&
00972       IsInsideBS(ti->y, _thd.pos.y + _thd.offs.y, _thd.size.y + _thd.outersize.y)) {
00973     /* Draw a blue rect. */
00974     DrawTileSelectionRect(ti, PALETTE_SEL_TILE_BLUE);
00975     return;
00976   }
00977 }
00978 
00979 static void ViewportAddLandscape()
00980 {
00981   int x, y, width, height;
00982   TileInfo ti;
00983   bool direction;
00984 
00985   _cur_ti = &ti;
00986 
00987   /* Transform into tile coordinates and round to closest full tile */
00988   x = ((_vd.dpi.top >> 1) - (_vd.dpi.left >> 2)) & ~TILE_UNIT_MASK;
00989   y = ((_vd.dpi.top >> 1) + (_vd.dpi.left >> 2) - TILE_SIZE) & ~TILE_UNIT_MASK;
00990 
00991   /* determine size of area */
00992   {
00993     Point pt = RemapCoords(x, y, 241);
00994     width = (_vd.dpi.left + _vd.dpi.width - pt.x + 95) >> 6;
00995     height = (_vd.dpi.top + _vd.dpi.height - pt.y) >> 5 << 1;
00996   }
00997 
00998   assert(width > 0);
00999   assert(height > 0);
01000 
01001   direction = false;
01002 
01003   do {
01004     int width_cur = width;
01005     int x_cur = x;
01006     int y_cur = y;
01007 
01008     do {
01009       TileType tt = MP_VOID;
01010 
01011       ti.x = x_cur;
01012       ti.y = y_cur;
01013 
01014       ti.z = 0;
01015 
01016       ti.tileh = SLOPE_FLAT;
01017       ti.tile = INVALID_TILE;
01018 
01019       if (0 <= x_cur && x_cur < (int)MapMaxX() * TILE_SIZE &&
01020           0 <= y_cur && y_cur < (int)MapMaxY() * TILE_SIZE) {
01021         TileIndex tile = TileVirtXY(x_cur, y_cur);
01022 
01023         if (!_settings_game.construction.freeform_edges || (TileX(tile) != 0 && TileY(tile) != 0)) {
01024           if (x_cur == ((int)MapMaxX() - 1) * TILE_SIZE || y_cur == ((int)MapMaxY() - 1) * TILE_SIZE) {
01025             uint maxh = max<uint>(TileHeight(tile), 1);
01026             for (uint h = 0; h < maxh; h++) {
01027               DrawGroundSpriteAt(SPR_SHADOW_CELL, PAL_NONE, ti.x, ti.y, h * TILE_HEIGHT);
01028             }
01029           }
01030 
01031           ti.tile = tile;
01032           ti.tileh = GetTileSlope(tile, &ti.z);
01033           tt = GetTileType(tile);
01034         }
01035       }
01036 
01037       _vd.foundation_part = FOUNDATION_PART_NONE;
01038       _vd.foundation[0] = -1;
01039       _vd.foundation[1] = -1;
01040       _vd.last_foundation_child[0] = NULL;
01041       _vd.last_foundation_child[1] = NULL;
01042 
01043       _tile_type_procs[tt]->draw_tile_proc(&ti);
01044 
01045       if ((x_cur == (int)MapMaxX() * TILE_SIZE && IsInsideMM(y_cur, 0, MapMaxY() * TILE_SIZE + 1)) ||
01046         (y_cur == (int)MapMaxY() * TILE_SIZE && IsInsideMM(x_cur, 0, MapMaxX() * TILE_SIZE + 1))) {
01047         TileIndex tile = TileVirtXY(x_cur, y_cur);
01048         ti.tile = tile;
01049         ti.tileh = GetTileSlope(tile, &ti.z);
01050         tt = GetTileType(tile);
01051       }
01052       if (ti.tile != INVALID_TILE) DrawTileSelection(&ti);
01053 
01054       y_cur += 0x10;
01055       x_cur -= 0x10;
01056     } while (--width_cur);
01057 
01058     if ((direction ^= 1) != 0) {
01059       y += 0x10;
01060     } else {
01061       x += 0x10;
01062     }
01063   } while (--height);
01064 }
01065 
01076 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)
01077 {
01078   bool small = dpi->zoom >= small_from;
01079 
01080   int left   = dpi->left;
01081   int top    = dpi->top;
01082   int right  = left + dpi->width;
01083   int bottom = top + dpi->height;
01084 
01085   int sign_height     = ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM, dpi->zoom);
01086   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, dpi->zoom);
01087 
01088   if (bottom < sign->top ||
01089       top   > sign->top + sign_height ||
01090       right < sign->center - sign_half_width ||
01091       left  > sign->center + sign_half_width) {
01092     return;
01093   }
01094 
01095   if (!small) {
01096     AddStringToDraw(sign->center - sign_half_width, sign->top, string_normal, params_1, params_2, colour, sign->width_normal);
01097   } else {
01098     int shadow_offset = 0;
01099     if (string_small_shadow != STR_NULL) {
01100       shadow_offset = 4;
01101       AddStringToDraw(sign->center - sign_half_width + shadow_offset, sign->top, string_small_shadow, params_1, params_2, INVALID_COLOUR, sign->width_small);
01102     }
01103     AddStringToDraw(sign->center - sign_half_width, sign->top - shadow_offset, string_small, params_1, params_2,
01104         colour, sign->width_small | 0x8000);
01105   }
01106 }
01107 
01108 static void ViewportAddTownNames(DrawPixelInfo *dpi)
01109 {
01110   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES) || _game_mode == GM_MENU) return;
01111 
01112   const Town *t;
01113   FOR_ALL_TOWNS(t) {
01114     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &t->sign,
01115         _settings_client.gui.population_in_label ? STR_VIEWPORT_TOWN_POP : STR_VIEWPORT_TOWN,
01116         STR_VIEWPORT_TOWN_TINY_WHITE, STR_VIEWPORT_TOWN_TINY_BLACK,
01117         t->index, t->population);
01118   }
01119 }
01120 
01121 
01122 static void ViewportAddStationNames(DrawPixelInfo *dpi)
01123 {
01124   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || _game_mode == GM_MENU) return;
01125 
01126   const BaseStation *st;
01127   FOR_ALL_BASE_STATIONS(st) {
01128     /* Check whether the base station is a station or a waypoint */
01129     bool is_station = Station::IsExpected(st);
01130 
01131     /* Don't draw if the display options are disabled */
01132     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
01133 
01134     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &st->sign,
01135         is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT,
01136         (is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT) + 1, STR_NULL,
01137         st->index, st->facilities, (st->owner == OWNER_NONE || !st->IsInUse()) ? COLOUR_GREY : _company_colours[st->owner]);
01138   }
01139 }
01140 
01141 
01142 static void ViewportAddSigns(DrawPixelInfo *dpi)
01143 {
01144   /* Signs are turned off or are invisible */
01145   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS)) return;
01146 
01147   const Sign *si;
01148   FOR_ALL_SIGNS(si) {
01149     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &si->sign,
01150         STR_WHITE_SIGN,
01151         IsTransparencySet(TO_SIGNS) ? STR_VIEWPORT_SIGN_SMALL_WHITE : STR_VIEWPORT_SIGN_SMALL_BLACK, STR_NULL,
01152         si->index, 0, (si->owner == OWNER_NONE) ? COLOUR_GREY : _company_colours[si->owner]);
01153   }
01154 }
01155 
01162 void ViewportSign::UpdatePosition(int center, int top, StringID str)
01163 {
01164   if (this->width_normal != 0) this->MarkDirty();
01165 
01166   this->top = top;
01167 
01168   char buffer[DRAW_STRING_BUFFER];
01169 
01170   GetString(buffer, str, lastof(buffer));
01171   this->width_normal = VPSM_LEFT + Align(GetStringBoundingBox(buffer).width, 2) + VPSM_RIGHT;
01172   this->center = center;
01173 
01174   /* zoomed out version */
01175   _cur_fontsize = FS_SMALL;
01176   this->width_small = VPSM_LEFT + Align(GetStringBoundingBox(buffer).width, 2) + VPSM_RIGHT;
01177   _cur_fontsize = FS_NORMAL;
01178 
01179   this->MarkDirty();
01180 }
01181 
01187 void ViewportSign::MarkDirty() const
01188 {
01189   /* We use ZOOM_LVL_MAX here, as every viewport can have an other zoom,
01190    *  and there is no way for us to know which is the biggest. So make the
01191    *  biggest area dirty, and we are safe for sure.
01192    * We also add 1 to make sure the whole thing is redrawn. */
01193   MarkAllViewportsDirty(
01194     this->center - ScaleByZoom(this->width_normal / 2 + 1, ZOOM_LVL_MAX),
01195     this->top    - ScaleByZoom(1, ZOOM_LVL_MAX),
01196     this->center + ScaleByZoom(this->width_normal / 2 + 1, ZOOM_LVL_MAX),
01197     this->top    + ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM + 1, ZOOM_LVL_MAX));
01198 }
01199 
01200 static void ViewportDrawTileSprites(const TileSpriteToDrawVector *tstdv)
01201 {
01202   const TileSpriteToDraw *tsend = tstdv->End();
01203   for (const TileSpriteToDraw *ts = tstdv->Begin(); ts != tsend; ++ts) {
01204     DrawSprite(ts->image, ts->pal, ts->x, ts->y, ts->sub);
01205   }
01206 }
01207 
01209 static void ViewportSortParentSprites(ParentSpriteToSortVector *psdv)
01210 {
01211   ParentSpriteToDraw **psdvend = psdv->End();
01212   ParentSpriteToDraw **psd = psdv->Begin();
01213   while (psd != psdvend) {
01214     ParentSpriteToDraw *ps = *psd;
01215 
01216     if (ps->comparison_done) {
01217       psd++;
01218       continue;
01219     }
01220 
01221     ps->comparison_done = true;
01222 
01223     for (ParentSpriteToDraw **psd2 = psd + 1; psd2 != psdvend; psd2++) {
01224       ParentSpriteToDraw *ps2 = *psd2;
01225 
01226       if (ps2->comparison_done) continue;
01227 
01228       /* Decide which comparator to use, based on whether the bounding
01229        * boxes overlap
01230        */
01231       if (ps->xmax >= ps2->xmin && ps->xmin <= ps2->xmax && // overlap in X?
01232           ps->ymax >= ps2->ymin && ps->ymin <= ps2->ymax && // overlap in Y?
01233           ps->zmax >= ps2->zmin && ps->zmin <= ps2->zmax) { // overlap in Z?
01234         /* Use X+Y+Z as the sorting order, so sprites closer to the bottom of
01235          * the screen and with higher Z elevation, are drawn in front.
01236          * Here X,Y,Z are the coordinates of the "center of mass" of the sprite,
01237          * i.e. X=(left+right)/2, etc.
01238          * However, since we only care about order, don't actually divide / 2
01239          */
01240         if (ps->xmin + ps->xmax + ps->ymin + ps->ymax + ps->zmin + ps->zmax <=
01241             ps2->xmin + ps2->xmax + ps2->ymin + ps2->ymax + ps2->zmin + ps2->zmax) {
01242           continue;
01243         }
01244       } else {
01245         /* We only change the order, if it is definite.
01246          * I.e. every single order of X, Y, Z says ps2 is behind ps or they overlap.
01247          * That is: If one partial order says ps behind ps2, do not change the order.
01248          */
01249         if (ps->xmax < ps2->xmin ||
01250             ps->ymax < ps2->ymin ||
01251             ps->zmax < ps2->zmin) {
01252           continue;
01253         }
01254       }
01255 
01256       /* Move ps2 in front of ps */
01257       ParentSpriteToDraw *temp = ps2;
01258       for (ParentSpriteToDraw **psd3 = psd2; psd3 > psd; psd3--) {
01259         *psd3 = *(psd3 - 1);
01260       }
01261       *psd = temp;
01262     }
01263   }
01264 }
01265 
01266 static void ViewportDrawParentSprites(const ParentSpriteToSortVector *psd, const ChildScreenSpriteToDrawVector *csstdv)
01267 {
01268   const ParentSpriteToDraw * const *psd_end = psd->End();
01269   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
01270     const ParentSpriteToDraw *ps = *it;
01271     if (ps->image != SPR_EMPTY_BOUNDING_BOX) DrawSprite(ps->image, ps->pal, ps->x, ps->y, ps->sub);
01272 
01273     int child_idx = ps->first_child;
01274     while (child_idx >= 0) {
01275       const ChildScreenSpriteToDraw *cs = csstdv->Get(child_idx);
01276       child_idx = cs->next;
01277       DrawSprite(cs->image, cs->pal, ps->left + cs->x, ps->top + cs->y, cs->sub);
01278     }
01279   }
01280 }
01281 
01286 static void ViewportDrawBoundingBoxes(const ParentSpriteToSortVector *psd)
01287 {
01288   const ParentSpriteToDraw * const *psd_end = psd->End();
01289   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
01290     const ParentSpriteToDraw *ps = *it;
01291     Point pt1 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmax + 1); // top front corner
01292     Point pt2 = RemapCoords(ps->xmin    , ps->ymax + 1, ps->zmax + 1); // top left corner
01293     Point pt3 = RemapCoords(ps->xmax + 1, ps->ymin    , ps->zmax + 1); // top right corner
01294     Point pt4 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmin    ); // bottom front corner
01295 
01296     DrawBox(        pt1.x,         pt1.y,
01297             pt2.x - pt1.x, pt2.y - pt1.y,
01298             pt3.x - pt1.x, pt3.y - pt1.y,
01299             pt4.x - pt1.x, pt4.y - pt1.y);
01300   }
01301 }
01302 
01303 static void ViewportDrawStrings(DrawPixelInfo *dpi, const StringSpriteToDrawVector *sstdv)
01304 {
01305   DrawPixelInfo dp;
01306   ZoomLevel zoom;
01307 
01308   _cur_dpi = &dp;
01309   dp = *dpi;
01310 
01311   zoom = dp.zoom;
01312   dp.zoom = ZOOM_LVL_NORMAL;
01313 
01314   dp.left   = UnScaleByZoom(dp.left,   zoom);
01315   dp.top    = UnScaleByZoom(dp.top,    zoom);
01316   dp.width  = UnScaleByZoom(dp.width,  zoom);
01317   dp.height = UnScaleByZoom(dp.height, zoom);
01318 
01319   const StringSpriteToDraw *ssend = sstdv->End();
01320   for (const StringSpriteToDraw *ss = sstdv->Begin(); ss != ssend; ++ss) {
01321     TextColour colour = TC_BLACK;
01322     bool small = HasBit(ss->width, 15);
01323     int w = GB(ss->width, 0, 15);
01324     int x = UnScaleByZoom(ss->x, zoom);
01325     int y = UnScaleByZoom(ss->y, zoom);
01326     int h = VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM;
01327 
01328     SetDParam(0, ss->params[0]);
01329     SetDParam(1, ss->params[1]);
01330 
01331     if (ss->colour != INVALID_COLOUR) {
01332       /* Do not draw signs nor station names if they are set invisible */
01333       if (IsInvisibilitySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) continue;
01334 
01335       /* if we didn't draw a rectangle, or if transparant building is on,
01336        * draw the text in the colour the rectangle would have */
01337       if (IsTransparencySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) {
01338         /* Real colours need the IS_PALETTE_COLOUR flag
01339          * otherwise colours from _string_colourmap are assumed. */
01340         colour = (TextColour)_colour_gradient[ss->colour][6] | IS_PALETTE_COLOUR;
01341       }
01342 
01343       /* Draw the rectangle if 'tranparent station signs' is off,
01344        * or if we are drawing a general text sign (STR_WHITE_SIGN) */
01345       if (!IsTransparencySet(TO_SIGNS) || ss->string == STR_WHITE_SIGN) {
01346         DrawFrameRect(
01347           x, y, x + w, y + h, ss->colour,
01348           IsTransparencySet(TO_SIGNS) ? FR_TRANSPARENT : FR_NONE
01349         );
01350       }
01351     }
01352 
01353     DrawString(x + VPSM_LEFT, x + w - 1 - VPSM_RIGHT, y + VPSM_TOP, ss->string, colour, SA_CENTER);
01354   }
01355 }
01356 
01357 void ViewportDoDraw(const ViewPort *vp, int left, int top, int right, int bottom)
01358 {
01359   DrawPixelInfo *old_dpi = _cur_dpi;
01360   _cur_dpi = &_vd.dpi;
01361 
01362   _vd.dpi.zoom = vp->zoom;
01363   int mask = ScaleByZoom(-1, vp->zoom);
01364 
01365   _vd.combine_sprites = SPRITE_COMBINE_NONE;
01366 
01367   _vd.dpi.width = (right - left) & mask;
01368   _vd.dpi.height = (bottom - top) & mask;
01369   _vd.dpi.left = left & mask;
01370   _vd.dpi.top = top & mask;
01371   _vd.dpi.pitch = old_dpi->pitch;
01372   _vd.last_child = NULL;
01373 
01374   int x = UnScaleByZoom(_vd.dpi.left - (vp->virtual_left & mask), vp->zoom) + vp->left;
01375   int y = UnScaleByZoom(_vd.dpi.top - (vp->virtual_top & mask), vp->zoom) + vp->top;
01376 
01377   _vd.dpi.dst_ptr = BlitterFactoryBase::GetCurrentBlitter()->MoveTo(old_dpi->dst_ptr, x - old_dpi->left, y - old_dpi->top);
01378 
01379   ViewportAddLandscape();
01380   ViewportAddVehicles(&_vd.dpi);
01381 
01382   ViewportAddTownNames(&_vd.dpi);
01383   ViewportAddStationNames(&_vd.dpi);
01384   ViewportAddSigns(&_vd.dpi);
01385 
01386   DrawTextEffects(&_vd.dpi);
01387 
01388   if (_vd.tile_sprites_to_draw.Length() != 0) ViewportDrawTileSprites(&_vd.tile_sprites_to_draw);
01389 
01390   ParentSpriteToDraw *psd_end = _vd.parent_sprites_to_draw.End();
01391   for (ParentSpriteToDraw *it = _vd.parent_sprites_to_draw.Begin(); it != psd_end; it++) {
01392     *_vd.parent_sprites_to_sort.Append() = it;
01393   }
01394 
01395   ViewportSortParentSprites(&_vd.parent_sprites_to_sort);
01396   ViewportDrawParentSprites(&_vd.parent_sprites_to_sort, &_vd.child_screen_sprites_to_draw);
01397 
01398   if (_draw_bounding_boxes) ViewportDrawBoundingBoxes(&_vd.parent_sprites_to_sort);
01399 
01400   if (_vd.string_sprites_to_draw.Length() != 0) ViewportDrawStrings(&_vd.dpi, &_vd.string_sprites_to_draw);
01401 
01402   _cur_dpi = old_dpi;
01403 
01404   _vd.string_sprites_to_draw.Clear();
01405   _vd.tile_sprites_to_draw.Clear();
01406   _vd.parent_sprites_to_draw.Clear();
01407   _vd.parent_sprites_to_sort.Clear();
01408   _vd.child_screen_sprites_to_draw.Clear();
01409 }
01410 
01413 static void ViewportDrawChk(const ViewPort *vp, int left, int top, int right, int bottom)
01414 {
01415   if (ScaleByZoom(bottom - top, vp->zoom) * ScaleByZoom(right - left, vp->zoom) > 180000) {
01416     if ((bottom - top) > (right - left)) {
01417       int t = (top + bottom) >> 1;
01418       ViewportDrawChk(vp, left, top, right, t);
01419       ViewportDrawChk(vp, left, t, right, bottom);
01420     } else {
01421       int t = (left + right) >> 1;
01422       ViewportDrawChk(vp, left, top, t, bottom);
01423       ViewportDrawChk(vp, t, top, right, bottom);
01424     }
01425   } else {
01426     ViewportDoDraw(vp,
01427       ScaleByZoom(left - vp->left, vp->zoom) + vp->virtual_left,
01428       ScaleByZoom(top - vp->top, vp->zoom) + vp->virtual_top,
01429       ScaleByZoom(right - vp->left, vp->zoom) + vp->virtual_left,
01430       ScaleByZoom(bottom - vp->top, vp->zoom) + vp->virtual_top
01431     );
01432   }
01433 }
01434 
01435 static inline void ViewportDraw(const ViewPort *vp, int left, int top, int right, int bottom)
01436 {
01437   if (right <= vp->left || bottom <= vp->top) return;
01438 
01439   if (left >= vp->left + vp->width) return;
01440 
01441   if (left < vp->left) left = vp->left;
01442   if (right > vp->left + vp->width) right = vp->left + vp->width;
01443 
01444   if (top >= vp->top + vp->height) return;
01445 
01446   if (top < vp->top) top = vp->top;
01447   if (bottom > vp->top + vp->height) bottom = vp->top + vp->height;
01448 
01449   ViewportDrawChk(vp, left, top, right, bottom);
01450 }
01451 
01455 void Window::DrawViewport() const
01456 {
01457   DrawPixelInfo *dpi = _cur_dpi;
01458 
01459   dpi->left += this->left;
01460   dpi->top += this->top;
01461 
01462   ViewportDraw(this->viewport, dpi->left, dpi->top, dpi->left + dpi->width, dpi->top + dpi->height);
01463 
01464   dpi->left -= this->left;
01465   dpi->top -= this->top;
01466 }
01467 
01468 static inline void ClampViewportToMap(const ViewPort *vp, int &x, int &y)
01469 {
01470   /* Centre of the viewport is hot spot */
01471   x += vp->virtual_width / 2;
01472   y += vp->virtual_height / 2;
01473 
01474   /* Convert viewport coordinates to map coordinates
01475    * Calculation is scaled by 4 to avoid rounding errors */
01476   int vx = -x + y * 2;
01477   int vy =  x + y * 2;
01478 
01479   /* clamp to size of map */
01480   vx = Clamp(vx, 0, MapMaxX() * TILE_SIZE * 4);
01481   vy = Clamp(vy, 0, MapMaxY() * TILE_SIZE * 4);
01482 
01483   /* Convert map coordinates to viewport coordinates */
01484   x = (-vx + vy) / 2;
01485   y = ( vx + vy) / 4;
01486 
01487   /* Remove centreing */
01488   x -= vp->virtual_width / 2;
01489   y -= vp->virtual_height / 2;
01490 }
01491 
01496 void UpdateViewportPosition(Window *w)
01497 {
01498   const ViewPort *vp = w->viewport;
01499 
01500   if (w->viewport->follow_vehicle != INVALID_VEHICLE) {
01501     const Vehicle *veh = Vehicle::Get(w->viewport->follow_vehicle);
01502     Point pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
01503 
01504     w->viewport->scrollpos_x = pt.x;
01505     w->viewport->scrollpos_y = pt.y;
01506     SetViewportPosition(w, pt.x, pt.y);
01507   } else {
01508     /* Ensure the destination location is within the map */
01509     ClampViewportToMap(vp, w->viewport->dest_scrollpos_x, w->viewport->dest_scrollpos_y);
01510 
01511     int delta_x = w->viewport->dest_scrollpos_x - w->viewport->scrollpos_x;
01512     int delta_y = w->viewport->dest_scrollpos_y - w->viewport->scrollpos_y;
01513 
01514     if (delta_x != 0 || delta_y != 0) {
01515       if (_settings_client.gui.smooth_scroll) {
01516         int max_scroll = ScaleByMapSize1D(512);
01517         /* Not at our desired positon yet... */
01518         w->viewport->scrollpos_x += Clamp(delta_x / 4, -max_scroll, max_scroll);
01519         w->viewport->scrollpos_y += Clamp(delta_y / 4, -max_scroll, max_scroll);
01520       } else {
01521         w->viewport->scrollpos_x = w->viewport->dest_scrollpos_x;
01522         w->viewport->scrollpos_y = w->viewport->dest_scrollpos_y;
01523       }
01524     }
01525 
01526     ClampViewportToMap(vp, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
01527 
01528     SetViewportPosition(w, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
01529   }
01530 }
01531 
01541 static void MarkViewportDirty(const ViewPort *vp, int left, int top, int right, int bottom)
01542 {
01543   right -= vp->virtual_left;
01544   if (right <= 0) return;
01545 
01546   bottom -= vp->virtual_top;
01547   if (bottom <= 0) return;
01548 
01549   left = max(0, left - vp->virtual_left);
01550 
01551   if (left >= vp->virtual_width) return;
01552 
01553   top = max(0, top - vp->virtual_top);
01554 
01555   if (top >= vp->virtual_height) return;
01556 
01557   SetDirtyBlocks(
01558     UnScaleByZoomLower(left, vp->zoom) + vp->left,
01559     UnScaleByZoomLower(top, vp->zoom) + vp->top,
01560     UnScaleByZoom(right, vp->zoom) + vp->left + 1,
01561     UnScaleByZoom(bottom, vp->zoom) + vp->top + 1
01562   );
01563 }
01564 
01573 void MarkAllViewportsDirty(int left, int top, int right, int bottom)
01574 {
01575   Window *w;
01576   FOR_ALL_WINDOWS_FROM_BACK(w) {
01577     ViewPort *vp = w->viewport;
01578     if (vp != NULL) {
01579       assert(vp->width != 0);
01580       MarkViewportDirty(vp, left, top, right, bottom);
01581     }
01582   }
01583 }
01584 
01585 void MarkTileDirtyByTile(TileIndex tile)
01586 {
01587   Point pt = RemapCoords(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, GetTileZ(tile));
01588   MarkAllViewportsDirty(
01589     pt.x - 31,
01590     pt.y - 122,
01591     pt.x - 31 + 67,
01592     pt.y - 122 + 154
01593   );
01594 }
01595 
01603 static void SetSelectionTilesDirty()
01604 {
01605   int x_start = _thd.pos.x;
01606   int y_start = _thd.pos.y;
01607 
01608   int x_size = _thd.size.x;
01609   int y_size = _thd.size.y;
01610 
01611   if (_thd.outersize.x != 0) {
01612     x_size  += _thd.outersize.x;
01613     x_start += _thd.offs.x;
01614     y_size  += _thd.outersize.y;
01615     y_start += _thd.offs.y;
01616   }
01617 
01618   x_size -= TILE_SIZE;
01619   y_size -= TILE_SIZE;
01620 
01621   assert(x_size >= 0);
01622   assert(y_size >= 0);
01623 
01624   int x_end = Clamp(x_start + x_size, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
01625   int y_end = Clamp(y_start + y_size, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
01626 
01627   x_start = Clamp(x_start, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
01628   y_start = Clamp(y_start, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
01629 
01630   /* make sure everything is multiple of TILE_SIZE */
01631   assert((x_end | y_end | x_start | y_start) % TILE_SIZE == 0);
01632 
01633   /* How it works:
01634    * Suppose we have to mark dirty rectangle of 3x4 tiles:
01635    *   x
01636    *  xxx
01637    * xxxxx
01638    *  xxxxx
01639    *   xxx
01640    *    x
01641    * This algorithm marks dirty columns of tiles, so it is done in 3+4-1 steps:
01642    * 1)  x     2)  x
01643    *    xxx       Oxx
01644    *   Oxxxx     xOxxx
01645    *    xxxxx     Oxxxx
01646    *     xxx       xxx
01647    *      x         x
01648    * And so forth...
01649    */
01650 
01651   int top_x = x_end; // coordinates of top dirty tile
01652   int top_y = y_start;
01653   int bot_x = top_x; // coordinates of bottom dirty tile
01654   int bot_y = top_y;
01655 
01656   do {
01657     Point top = RemapCoords2(top_x, top_y); // topmost dirty point
01658     Point bot = RemapCoords2(bot_x + TILE_SIZE - 1, bot_y + TILE_SIZE - 1); // bottommost point
01659 
01660     /* the 'x' coordinate of 'top' and 'bot' is the same (and always in the same distance from tile middle),
01661      * tile height/slope affects only the 'y' on-screen coordinate! */
01662 
01663     int l = top.x - (TILE_PIXELS - 2); // 'x' coordinate of left side of dirty rectangle
01664     int t = top.y;                     // 'y' coordinate of top side -//-
01665     int r = top.x + (TILE_PIXELS - 2); // right side of dirty rectangle
01666     int b = bot.y;                     // bottom -//-
01667 
01668     static const int OVERLAY_WIDTH = 4; // part of selection sprites is drawn outside the selected area
01669 
01670     /* For halftile foundations on SLOPE_STEEP_S the sprite extents some more towards the top */
01671     MarkAllViewportsDirty(l - OVERLAY_WIDTH, t - OVERLAY_WIDTH - TILE_HEIGHT, r + OVERLAY_WIDTH, b + OVERLAY_WIDTH);
01672 
01673     /* haven't we reached the topmost tile yet? */
01674     if (top_x != x_start) {
01675       top_x -= TILE_SIZE;
01676     } else {
01677       top_y += TILE_SIZE;
01678     }
01679 
01680     /* the way the bottom tile changes is different when we reach the bottommost tile */
01681     if (bot_y != y_end) {
01682       bot_y += TILE_SIZE;
01683     } else {
01684       bot_x -= TILE_SIZE;
01685     }
01686   } while (bot_x >= top_x);
01687 }
01688 
01689 
01690 void SetSelectionRed(bool b)
01691 {
01692   _thd.make_square_red = b;
01693   SetSelectionTilesDirty();
01694 }
01695 
01704 static bool CheckClickOnViewportSign(const ViewPort *vp, int x, int y, const ViewportSign *sign)
01705 {
01706   bool small = (vp->zoom >= ZOOM_LVL_OUT_4X);
01707   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, vp->zoom);
01708   int sign_height = ScaleByZoom(VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM, vp->zoom);
01709 
01710   x = ScaleByZoom(x - vp->left, vp->zoom) + vp->virtual_left;
01711   y = ScaleByZoom(y - vp->top, vp->zoom) + vp->virtual_top;
01712 
01713   return
01714       y >= sign->top &&
01715       y <  sign->top + sign_height &&
01716       x >= sign->center - sign_half_width &&
01717       x <  sign->center + sign_half_width;
01718 }
01719 
01720 static bool CheckClickOnTown(const ViewPort *vp, int x, int y)
01721 {
01722   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES)) return false;
01723 
01724   const Town *t;
01725   FOR_ALL_TOWNS(t) {
01726     if (CheckClickOnViewportSign(vp, x, y, &t->sign)) {
01727       ShowTownViewWindow(t->index);
01728       return true;
01729     }
01730   }
01731 
01732   return false;
01733 }
01734 
01735 static bool CheckClickOnStation(const ViewPort *vp, int x, int y)
01736 {
01737   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || IsInvisibilitySet(TO_SIGNS)) return false;
01738 
01739   const BaseStation *st;
01740   FOR_ALL_BASE_STATIONS(st) {
01741     /* Check whether the base station is a station or a waypoint */
01742     bool is_station = Station::IsExpected(st);
01743 
01744     /* Don't check if the display options are disabled */
01745     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
01746 
01747     if (CheckClickOnViewportSign(vp, x, y, &st->sign)) {
01748       if (is_station) {
01749         ShowStationViewWindow(st->index);
01750       } else {
01751         ShowWaypointWindow(Waypoint::From(st));
01752       }
01753       return true;
01754     }
01755   }
01756 
01757   return false;
01758 }
01759 
01760 
01761 static bool CheckClickOnSign(const ViewPort *vp, int x, int y)
01762 {
01763   /* Signs are turned off, or they are transparent and invisibility is ON, or company is a spectator */
01764   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS) || _current_company == COMPANY_SPECTATOR) return false;
01765 
01766   const Sign *si;
01767   FOR_ALL_SIGNS(si) {
01768     if (CheckClickOnViewportSign(vp, x, y, &si->sign)) {
01769       HandleClickOnSign(si);
01770       return true;
01771     }
01772   }
01773 
01774   return false;
01775 }
01776 
01777 
01778 static bool CheckClickOnLandscape(const ViewPort *vp, int x, int y)
01779 {
01780   Point pt = TranslateXYToTileCoord(vp, x, y);
01781 
01782   if (pt.x != -1) return ClickTile(TileVirtXY(pt.x, pt.y));
01783   return true;
01784 }
01785 
01786 
01787 bool HandleViewportClicked(const ViewPort *vp, int x, int y)
01788 {
01789   const Vehicle *v;
01790 
01791   if (CheckClickOnTown(vp, x, y)) return true;
01792   if (CheckClickOnStation(vp, x, y)) return true;
01793   if (CheckClickOnSign(vp, x, y)) return true;
01794   CheckClickOnLandscape(vp, x, y);
01795 
01796   v = CheckClickOnVehicle(vp, x, y);
01797   if (v != NULL) {
01798     DEBUG(misc, 2, "Vehicle %d (index %d) at %p", v->unitnumber, v->index, v);
01799     if (IsCompanyBuildableVehicleType(v)) ShowVehicleViewWindow(v->First());
01800     return true;
01801   }
01802   return CheckClickOnLandscape(vp, x, y);
01803 }
01804 
01805 Vehicle *CheckMouseOverVehicle()
01806 {
01807   const Window *w;
01808   const ViewPort *vp;
01809 
01810   int x = _cursor.pos.x;
01811   int y = _cursor.pos.y;
01812 
01813   w = FindWindowFromPt(x, y);
01814   if (w == NULL) return NULL;
01815 
01816   vp = IsPtInWindowViewport(w, x, y);
01817   return (vp != NULL) ? CheckClickOnVehicle(vp, x, y) : NULL;
01818 }
01819 
01820 
01821 
01822 void PlaceObject()
01823 {
01824   Point pt;
01825   Window *w;
01826 
01827   pt = GetTileBelowCursor();
01828   if (pt.x == -1) return;
01829 
01830   if (_thd.place_mode == HT_POINT) {
01831     pt.x += 8;
01832     pt.y += 8;
01833   }
01834 
01835   _tile_fract_coords.x = pt.x & TILE_UNIT_MASK;
01836   _tile_fract_coords.y = pt.y & TILE_UNIT_MASK;
01837 
01838   w = GetCallbackWnd();
01839   if (w != NULL) w->OnPlaceObject(pt, TileVirtXY(pt.x, pt.y));
01840 }
01841 
01842 
01851 bool ScrollWindowTo(int x, int y, int z, Window *w, bool instant)
01852 {
01853   /* The slope cannot be acquired outside of the map, so make sure we are always within the map. */
01854   if (z == -1) z = GetSlopeZ(Clamp(x, 0, MapSizeX() * TILE_SIZE - 1), Clamp(y, 0, MapSizeY() * TILE_SIZE - 1));
01855 
01856   Point pt = MapXYZToViewport(w->viewport, x, y, z);
01857   w->viewport->follow_vehicle = INVALID_VEHICLE;
01858 
01859   if (w->viewport->dest_scrollpos_x == pt.x && w->viewport->dest_scrollpos_y == pt.y)
01860     return false;
01861 
01862   if (instant) {
01863     w->viewport->scrollpos_x = pt.x;
01864     w->viewport->scrollpos_y = pt.y;
01865   }
01866 
01867   w->viewport->dest_scrollpos_x = pt.x;
01868   w->viewport->dest_scrollpos_y = pt.y;
01869   return true;
01870 }
01871 
01872 bool ScrollMainWindowToTile(TileIndex tile, bool instant)
01873 {
01874   return ScrollMainWindowTo(TileX(tile) * TILE_SIZE + TILE_SIZE / 2, TileY(tile) * TILE_SIZE + TILE_SIZE / 2, -1, instant);
01875 }
01876 
01877 void SetRedErrorSquare(TileIndex tile)
01878 {
01879   TileIndex old;
01880 
01881   old = _thd.redsq;
01882   _thd.redsq = tile;
01883 
01884   if (tile != old) {
01885     if (tile != INVALID_TILE) MarkTileDirtyByTile(tile);
01886     if (old  != INVALID_TILE) MarkTileDirtyByTile(old);
01887   }
01888 }
01889 
01894 void SetTileSelectSize(int w, int h)
01895 {
01896   _thd.new_size.x = w * TILE_SIZE;
01897   _thd.new_size.y = h * TILE_SIZE;
01898   _thd.new_outersize.x = 0;
01899   _thd.new_outersize.y = 0;
01900 }
01901 
01902 void SetTileSelectBigSize(int ox, int oy, int sx, int sy)
01903 {
01904   _thd.offs.x = ox * TILE_SIZE;
01905   _thd.offs.y = oy * TILE_SIZE;
01906   _thd.new_outersize.x = sx * TILE_SIZE;
01907   _thd.new_outersize.y = sy * TILE_SIZE;
01908 }
01909 
01911 static HighLightStyle GetAutorailHT(int x, int y)
01912 {
01913   return HT_RAIL | _autorail_piece[x & TILE_UNIT_MASK][y & TILE_UNIT_MASK];
01914 }
01915 
01923 void UpdateTileSelection()
01924 {
01925   int x1;
01926   int y1;
01927 
01928   _thd.new_drawstyle = HT_NONE;
01929 
01930   if (_thd.place_mode == HT_SPECIAL) {
01931     x1 = _thd.selend.x;
01932     y1 = _thd.selend.y;
01933     if (x1 != -1) {
01934       int x2 = _thd.selstart.x & ~TILE_UNIT_MASK;
01935       int y2 = _thd.selstart.y & ~TILE_UNIT_MASK;
01936       x1 &= ~TILE_UNIT_MASK;
01937       y1 &= ~TILE_UNIT_MASK;
01938 
01939       if (x1 >= x2) Swap(x1, x2);
01940       if (y1 >= y2) Swap(y1, y2);
01941       _thd.new_pos.x = x1;
01942       _thd.new_pos.y = y1;
01943       _thd.new_size.x = x2 - x1 + TILE_SIZE;
01944       _thd.new_size.y = y2 - y1 + TILE_SIZE;
01945       _thd.new_drawstyle = _thd.next_drawstyle;
01946     }
01947   } else if (_thd.place_mode != HT_NONE) {
01948     Point pt = GetTileBelowCursor();
01949     x1 = pt.x;
01950     y1 = pt.y;
01951     if (x1 != -1) {
01952       switch (_thd.place_mode & HT_DRAG_MASK) {
01953         case HT_RECT:
01954           _thd.new_drawstyle = HT_RECT;
01955           break;
01956         case HT_POINT:
01957           _thd.new_drawstyle = HT_POINT;
01958           x1 += TILE_SIZE / 2;
01959           y1 += TILE_SIZE / 2;
01960           break;
01961         case HT_RAIL:
01962           /* Draw one highlighted tile in any direction */
01963           _thd.new_drawstyle = GetAutorailHT(pt.x, pt.y);
01964           break;
01965         case HT_LINE:
01966           switch (_thd.place_mode & HT_DIR_MASK) {
01967             case HT_DIR_X: _thd.new_drawstyle = HT_LINE | HT_DIR_X; break;
01968             case HT_DIR_Y: _thd.new_drawstyle = HT_LINE | HT_DIR_Y; break;
01969 
01970             case HT_DIR_HU:
01971             case HT_DIR_HL:
01972               _thd.new_drawstyle = (pt.x & TILE_UNIT_MASK) + (pt.y & TILE_UNIT_MASK) <= TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
01973               break;
01974 
01975             case HT_DIR_VL:
01976             case HT_DIR_VR:
01977               _thd.new_drawstyle = (pt.x & TILE_UNIT_MASK) > (pt.y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
01978               break;
01979 
01980             default: NOT_REACHED();
01981           }
01982           _thd.selstart.x = x1 & ~TILE_UNIT_MASK;
01983           _thd.selstart.y = y1 & ~TILE_UNIT_MASK;
01984           break;
01985         default:
01986           NOT_REACHED();
01987           break;
01988       }
01989       _thd.new_pos.x = x1 & ~TILE_UNIT_MASK;
01990       _thd.new_pos.y = y1 & ~TILE_UNIT_MASK;
01991     }
01992   }
01993 
01994   /* redraw selection */
01995   if (_thd.drawstyle != _thd.new_drawstyle ||
01996       _thd.pos.x != _thd.new_pos.x || _thd.pos.y != _thd.new_pos.y ||
01997       _thd.size.x != _thd.new_size.x || _thd.size.y != _thd.new_size.y ||
01998       _thd.outersize.x != _thd.new_outersize.x ||
01999       _thd.outersize.y != _thd.new_outersize.y) {
02000     /* clear the old selection? */
02001     if (_thd.drawstyle) SetSelectionTilesDirty();
02002 
02003     _thd.drawstyle = _thd.new_drawstyle;
02004     _thd.pos = _thd.new_pos;
02005     _thd.size = _thd.new_size;
02006     _thd.outersize = _thd.new_outersize;
02007     _thd.dirty = 0xff;
02008 
02009     /* draw the new selection? */
02010     if (_thd.new_drawstyle) SetSelectionTilesDirty();
02011   }
02012 }
02013 
02019 static inline void ShowMeasurementTooltips(StringID str, uint paramcount, const uint64 params[])
02020 {
02021   if (!_settings_client.gui.measure_tooltip) return;
02022   GuiShowTooltips(str, paramcount, params, true);
02023 }
02024 
02026 void VpStartPlaceSizing(TileIndex tile, ViewportPlaceMethod method, ViewportDragDropSelectionProcess process)
02027 {
02028   _thd.select_method = method;
02029   _thd.select_proc   = process;
02030   _thd.selend.x = TileX(tile) * TILE_SIZE;
02031   _thd.selstart.x = TileX(tile) * TILE_SIZE;
02032   _thd.selend.y = TileY(tile) * TILE_SIZE;
02033   _thd.selstart.y = TileY(tile) * TILE_SIZE;
02034 
02035   /* Needed so several things (road, autoroad, bridges, ...) are placed correctly.
02036    * In effect, placement starts from the centre of a tile
02037    */
02038   if (method == VPM_X_OR_Y || method == VPM_FIX_X || method == VPM_FIX_Y) {
02039     _thd.selend.x += TILE_SIZE / 2;
02040     _thd.selend.y += TILE_SIZE / 2;
02041     _thd.selstart.x += TILE_SIZE / 2;
02042     _thd.selstart.y += TILE_SIZE / 2;
02043   }
02044 
02045   if (_thd.place_mode == HT_RECT) {
02046     _thd.place_mode = HT_SPECIAL;
02047     _thd.next_drawstyle = HT_RECT;
02048   } else if (_thd.place_mode & (HT_RAIL | HT_LINE)) {
02049     _thd.place_mode = HT_SPECIAL;
02050     _thd.next_drawstyle = _thd.drawstyle;
02051   } else {
02052     _thd.place_mode = HT_SPECIAL;
02053     _thd.next_drawstyle = HT_POINT;
02054   }
02055   _special_mouse_mode = WSM_SIZING;
02056 }
02057 
02058 void VpSetPlaceSizingLimit(int limit)
02059 {
02060   _thd.sizelimit = limit;
02061 }
02062 
02067 void VpSetPresizeRange(TileIndex from, TileIndex to)
02068 {
02069   uint64 distance = DistanceManhattan(from, to) + 1;
02070 
02071   _thd.selend.x = TileX(to) * TILE_SIZE;
02072   _thd.selend.y = TileY(to) * TILE_SIZE;
02073   _thd.selstart.x = TileX(from) * TILE_SIZE;
02074   _thd.selstart.y = TileY(from) * TILE_SIZE;
02075   _thd.next_drawstyle = HT_RECT;
02076 
02077   /* show measurement only if there is any length to speak of */
02078   if (distance > 1) ShowMeasurementTooltips(STR_MEASURE_LENGTH, 1, &distance);
02079 }
02080 
02081 static void VpStartPreSizing()
02082 {
02083   _thd.selend.x = -1;
02084   _special_mouse_mode = WSM_PRESIZE;
02085 }
02086 
02089 static HighLightStyle Check2x1AutoRail(int mode)
02090 {
02091   int fxpy = _tile_fract_coords.x + _tile_fract_coords.y;
02092   int sxpy = (_thd.selend.x & TILE_UNIT_MASK) + (_thd.selend.y & TILE_UNIT_MASK);
02093   int fxmy = _tile_fract_coords.x - _tile_fract_coords.y;
02094   int sxmy = (_thd.selend.x & TILE_UNIT_MASK) - (_thd.selend.y & TILE_UNIT_MASK);
02095 
02096   switch (mode) {
02097     default: NOT_REACHED();
02098     case 0: // end piece is lower right
02099       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
02100       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
02101       return HT_DIR_Y;
02102 
02103     case 1:
02104       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
02105       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
02106       return HT_DIR_Y;
02107 
02108     case 2:
02109       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
02110       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
02111       return HT_DIR_X;
02112 
02113     case 3:
02114       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
02115       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
02116       return HT_DIR_X;
02117   }
02118 }
02119 
02131 static bool SwapDirection(HighLightStyle style, TileIndex start_tile, TileIndex end_tile)
02132 {
02133   uint start_x = TileX(start_tile);
02134   uint start_y = TileY(start_tile);
02135   uint end_x = TileX(end_tile);
02136   uint end_y = TileY(end_tile);
02137 
02138   switch (style & HT_DRAG_MASK) {
02139     case HT_RAIL:
02140     case HT_LINE: return (end_x > start_x || (end_x == start_x && end_y > start_y));
02141 
02142     case HT_RECT:
02143     case HT_POINT: return (end_x != start_x && end_y < start_y);
02144     default: NOT_REACHED();
02145   }
02146 
02147   return false;
02148 }
02149 
02164 static int CalcHeightdiff(HighLightStyle style, uint distance, TileIndex start_tile, TileIndex end_tile)
02165 {
02166   bool swap = SwapDirection(style, start_tile, end_tile);
02167   byte style_t;
02168   uint h0, h1, ht; // start heigth, end height, and temp variable
02169 
02170   if (start_tile == end_tile) return 0;
02171   if (swap) Swap(start_tile, end_tile);
02172 
02173   switch (style & HT_DRAG_MASK) {
02174     case HT_RECT: {
02175       static const TileIndexDiffC heightdiff_area_by_dir[] = {
02176         /* Start */ {1, 0}, /* Dragging east */ {0, 0}, // Dragging south
02177         /* End   */ {0, 1}, /* Dragging east */ {1, 1}  // Dragging south
02178       };
02179 
02180       /* In the case of an area we can determine whether we were dragging south or
02181        * east by checking the X-coordinates of the tiles */
02182       style_t = (byte)(TileX(end_tile) > TileX(start_tile));
02183       start_tile = TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_area_by_dir[style_t]));
02184       end_tile   = TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_area_by_dir[2 + style_t]));
02185     }
02186     /* Fallthrough */
02187     case HT_POINT:
02188       h0 = TileHeight(start_tile);
02189       h1 = TileHeight(end_tile);
02190       break;
02191     default: { // All other types, this is mostly only line/autorail
02192       static const HighLightStyle flip_style_direction[] = {
02193         HT_DIR_X, HT_DIR_Y, HT_DIR_HL, HT_DIR_HU, HT_DIR_VR, HT_DIR_VL
02194       };
02195       static const TileIndexDiffC heightdiff_line_by_dir[] = {
02196         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_X  */ {0, 1}, {1, 1}, // HT_DIR_Y
02197         /* Start */ {1, 0}, {0, 0}, /* HT_DIR_HU */ {1, 0}, {1, 1}, // HT_DIR_HL
02198         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_VL */ {0, 1}, {1, 1}, // HT_DIR_VR
02199 
02200         /* Start */ {0, 1}, {0, 0}, /* HT_DIR_X  */ {1, 0}, {0, 0}, // HT_DIR_Y
02201         /* End   */ {0, 1}, {0, 0}, /* HT_DIR_HU */ {1, 1}, {0, 1}, // HT_DIR_HL
02202         /* End   */ {1, 0}, {0, 0}, /* HT_DIR_VL */ {0, 0}, {0, 1}, // HT_DIR_VR
02203       };
02204 
02205       distance %= 2; // we're only interested if the distance is even or uneven
02206       style &= HT_DIR_MASK;
02207 
02208       /* To handle autorail, we do some magic to be able to use a lookup table.
02209        * Firstly if we drag the other way around, we switch start&end, and if needed
02210        * also flip the drag-position. Eg if it was on the left, and the distance is even
02211        * that means the end, which is now the start is on the right */
02212       if (swap && distance == 0) style = flip_style_direction[style];
02213 
02214       /* Use lookup table for start-tile based on HighLightStyle direction */
02215       style_t = style * 2;
02216       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
02217       h0 = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t])));
02218       ht = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t + 1])));
02219       h0 = max(h0, ht);
02220 
02221       /* Use lookup table for end-tile based on HighLightStyle direction
02222        * flip around side (lower/upper, left/right) based on distance */
02223       if (distance == 0) style_t = flip_style_direction[style] * 2;
02224       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
02225       h1 = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t])));
02226       ht = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t + 1])));
02227       h1 = max(h1, ht);
02228     } break;
02229   }
02230 
02231   if (swap) Swap(h0, h1);
02232   /* Minimap shows height in intervals of 50 meters, let's do the same */
02233   return (int)(h1 - h0) * 50;
02234 }
02235 
02236 static const StringID measure_strings_length[] = {STR_NULL, STR_MEASURE_LENGTH, STR_MEASURE_LENGTH_HEIGHTDIFF};
02237 
02244 static void CheckUnderflow(int &test, int &other, int mult)
02245 {
02246   if (test >= 0) return;
02247 
02248   other += mult * test;
02249   test = 0;
02250 }
02251 
02259 static void CheckOverflow(int &test, int &other, int max, int mult)
02260 {
02261   if (test <= max) return;
02262 
02263   other += mult * (test - max);
02264   test = max;
02265 }
02266 
02268 static void CalcRaildirsDrawstyle(TileHighlightData *thd, int x, int y, int method)
02269 {
02270   HighLightStyle b;
02271 
02272   int dx = thd->selstart.x - (thd->selend.x & ~TILE_UNIT_MASK);
02273   int dy = thd->selstart.y - (thd->selend.y & ~TILE_UNIT_MASK);
02274   uint w = abs(dx) + TILE_SIZE;
02275   uint h = abs(dy) + TILE_SIZE;
02276 
02277   if (method & ~(VPM_RAILDIRS | VPM_SIGNALDIRS)) {
02278     /* We 'force' a selection direction; first four rail buttons. */
02279     method &= ~(VPM_RAILDIRS | VPM_SIGNALDIRS);
02280     int raw_dx = thd->selstart.x - thd->selend.x;
02281     int raw_dy = thd->selstart.y - thd->selend.y;
02282     switch (method) {
02283       case VPM_FIX_X:
02284         b = HT_LINE | HT_DIR_Y;
02285         x = thd->selstart.x;
02286         break;
02287 
02288       case VPM_FIX_Y:
02289         b = HT_LINE | HT_DIR_X;
02290         y = thd->selstart.y;
02291         break;
02292 
02293       case VPM_FIX_HORIZONTAL:
02294         if (dx == -dy) {
02295           /* We are on a straight horizontal line. Determine the 'rail'
02296            * to build based the sub tile location. */
02297           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
02298         } else {
02299           /* We are not on a straight line. Determine the rail to build
02300            * based on whether we are above or below it. */
02301           b = dx + dy >= TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
02302 
02303           /* Calculate where a horizontal line through the start point and
02304            * a vertical line from the selected end point intersect and
02305            * use that point as the end point. */
02306           int offset = (raw_dx - raw_dy) / 2;
02307           x = thd->selstart.x - (offset & ~TILE_UNIT_MASK);
02308           y = thd->selstart.y + (offset & ~TILE_UNIT_MASK);
02309 
02310           /* 'Build' the last half rail tile if needed */
02311           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
02312             if (dx + dy >= TILE_SIZE) {
02313               x += (dx + dy < 0) ? TILE_SIZE : -TILE_SIZE;
02314             } else {
02315               y += (dx + dy < 0) ? TILE_SIZE : -TILE_SIZE;
02316             }
02317           }
02318 
02319           /* Make sure we do not overflow the map! */
02320           CheckUnderflow(x, y, 1);
02321           CheckUnderflow(y, x, 1);
02322           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, 1);
02323           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, 1);
02324           assert(x >= 0 && y >= 0 && x <= (int)MapMaxX() * TILE_SIZE && y <= (int)MapMaxY() * TILE_SIZE);
02325         }
02326         break;
02327 
02328       case VPM_FIX_VERTICAL:
02329         if (dx == dy) {
02330           /* We are on a straight vertical line. Determine the 'rail'
02331            * to build based the sub tile location. */
02332           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02333         } else {
02334           /* We are not on a straight line. Determine the rail to build
02335            * based on whether we are left or right from it. */
02336           b = dx < dy ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02337 
02338           /* Calculate where a vertical line through the start point and
02339            * a horizontal line from the selected end point intersect and
02340            * use that point as the end point. */
02341           int offset = (raw_dx + raw_dy + TILE_SIZE) / 2;
02342           x = thd->selstart.x - (offset & ~TILE_UNIT_MASK);
02343           y = thd->selstart.y - (offset & ~TILE_UNIT_MASK);
02344 
02345           /* 'Build' the last half rail tile if needed */
02346           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
02347             if (dx - dy < 0) {
02348               y += (dx > dy) ? TILE_SIZE : -TILE_SIZE;
02349             } else {
02350               x += (dx < dy) ? TILE_SIZE : -TILE_SIZE;
02351             }
02352           }
02353 
02354           /* Make sure we do not overflow the map! */
02355           CheckUnderflow(x, y, -1);
02356           CheckUnderflow(y, x, -1);
02357           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, -1);
02358           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, -1);
02359           assert(x >= 0 && y >= 0 && x <= (int)MapMaxX() * TILE_SIZE && y <= (int)MapMaxY() * TILE_SIZE);
02360         }
02361         break;
02362 
02363       default:
02364         NOT_REACHED();
02365     }
02366   } else if (TileVirtXY(thd->selstart.x, thd->selstart.y) == TileVirtXY(x, y)) { // check if we're only within one tile
02367     if (method & VPM_RAILDIRS) {
02368       b = GetAutorailHT(x, y);
02369     } else { // rect for autosignals on one tile
02370       b = HT_RECT;
02371     }
02372   } else if (h == TILE_SIZE) { // Is this in X direction?
02373     if (dx == TILE_SIZE) { // 2x1 special handling
02374       b = (Check2x1AutoRail(3)) | HT_LINE;
02375     } else if (dx == -TILE_SIZE) {
02376       b = (Check2x1AutoRail(2)) | HT_LINE;
02377     } else {
02378       b = HT_LINE | HT_DIR_X;
02379     }
02380     y = thd->selstart.y;
02381   } else if (w == TILE_SIZE) { // Or Y direction?
02382     if (dy == TILE_SIZE) { // 2x1 special handling
02383       b = (Check2x1AutoRail(1)) | HT_LINE;
02384     } else if (dy == -TILE_SIZE) { // 2x1 other direction
02385       b = (Check2x1AutoRail(0)) | HT_LINE;
02386     } else {
02387       b = HT_LINE | HT_DIR_Y;
02388     }
02389     x = thd->selstart.x;
02390   } else if (w > h * 2) { // still count as x dir?
02391     b = HT_LINE | HT_DIR_X;
02392     y = thd->selstart.y;
02393   } else if (h > w * 2) { // still count as y dir?
02394     b = HT_LINE | HT_DIR_Y;
02395     x = thd->selstart.x;
02396   } else { // complicated direction
02397     int d = w - h;
02398     thd->selend.x = thd->selend.x & ~TILE_UNIT_MASK;
02399     thd->selend.y = thd->selend.y & ~TILE_UNIT_MASK;
02400 
02401     /* four cases. */
02402     if (x > thd->selstart.x) {
02403       if (y > thd->selstart.y) {
02404         /* south */
02405         if (d == 0) {
02406           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02407         } else if (d >= 0) {
02408           x = thd->selstart.x + h;
02409           b = HT_LINE | HT_DIR_VL;
02410         } else {
02411           y = thd->selstart.y + w;
02412           b = HT_LINE | HT_DIR_VR;
02413         }
02414       } else {
02415         /* west */
02416         if (d == 0) {
02417           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
02418         } else if (d >= 0) {
02419           x = thd->selstart.x + h;
02420           b = HT_LINE | HT_DIR_HL;
02421         } else {
02422           y = thd->selstart.y - w;
02423           b = HT_LINE | HT_DIR_HU;
02424         }
02425       }
02426     } else {
02427       if (y > thd->selstart.y) {
02428         /* east */
02429         if (d == 0) {
02430           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
02431         } else if (d >= 0) {
02432           x = thd->selstart.x - h;
02433           b = HT_LINE | HT_DIR_HU;
02434         } else {
02435           y = thd->selstart.y + w;
02436           b = HT_LINE | HT_DIR_HL;
02437         }
02438       } else {
02439         /* north */
02440         if (d == 0) {
02441           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
02442         } else if (d >= 0) {
02443           x = thd->selstart.x - h;
02444           b = HT_LINE | HT_DIR_VR;
02445         } else {
02446           y = thd->selstart.y - w;
02447           b = HT_LINE | HT_DIR_VL;
02448         }
02449       }
02450     }
02451   }
02452 
02453   if (_settings_client.gui.measure_tooltip) {
02454     TileIndex t0 = TileVirtXY(thd->selstart.x, thd->selstart.y);
02455     TileIndex t1 = TileVirtXY(x, y);
02456     uint distance = DistanceManhattan(t0, t1) + 1;
02457     byte index = 0;
02458     uint64 params[2];
02459 
02460     if (distance != 1) {
02461       int heightdiff = CalcHeightdiff(b, distance, t0, t1);
02462       /* If we are showing a tooltip for horizontal or vertical drags,
02463        * 2 tiles have a length of 1. To bias towards the ceiling we add
02464        * one before division. It feels more natural to count 3 lengths as 2 */
02465       if ((b & HT_DIR_MASK) != HT_DIR_X && (b & HT_DIR_MASK) != HT_DIR_Y) {
02466         distance = (distance + 1) / 2;
02467       }
02468 
02469       params[index++] = distance;
02470       if (heightdiff != 0) params[index++] = heightdiff;
02471     }
02472 
02473     ShowMeasurementTooltips(measure_strings_length[index], index, params);
02474   }
02475 
02476   thd->selend.x = x;
02477   thd->selend.y = y;
02478   thd->next_drawstyle = b;
02479 }
02480 
02487 void VpSelectTilesWithMethod(int x, int y, ViewportPlaceMethod method)
02488 {
02489   int sx, sy;
02490   HighLightStyle style;
02491 
02492   if (x == -1) {
02493     _thd.selend.x = -1;
02494     return;
02495   }
02496 
02497   /* Special handling of drag in any (8-way) direction */
02498   if (method & (VPM_RAILDIRS | VPM_SIGNALDIRS)) {
02499     _thd.selend.x = x;
02500     _thd.selend.y = y;
02501     CalcRaildirsDrawstyle(&_thd, x, y, method);
02502     return;
02503   }
02504 
02505   /* Needed so level-land is placed correctly */
02506   if (_thd.next_drawstyle == HT_POINT) {
02507     x += TILE_SIZE / 2;
02508     y += TILE_SIZE / 2;
02509   }
02510 
02511   sx = _thd.selstart.x;
02512   sy = _thd.selstart.y;
02513 
02514   switch (method) {
02515     case VPM_X_OR_Y: // drag in X or Y direction
02516       if (abs(sy - y) < abs(sx - x)) {
02517         y = sy;
02518         style = HT_DIR_X;
02519       } else {
02520         x = sx;
02521         style = HT_DIR_Y;
02522       }
02523       goto calc_heightdiff_single_direction;
02524     case VPM_FIX_X: // drag in Y direction
02525       x = sx;
02526       style = HT_DIR_Y;
02527       goto calc_heightdiff_single_direction;
02528     case VPM_FIX_Y: // drag in X direction
02529       y = sy;
02530       style = HT_DIR_X;
02531 
02532 calc_heightdiff_single_direction:;
02533       if (_settings_client.gui.measure_tooltip) {
02534         TileIndex t0 = TileVirtXY(sx, sy);
02535         TileIndex t1 = TileVirtXY(x, y);
02536         uint distance = DistanceManhattan(t0, t1) + 1;
02537         byte index = 0;
02538         uint64 params[2];
02539 
02540         if (distance != 1) {
02541           /* With current code passing a HT_LINE style to calculate the height
02542            * difference is enough. However if/when a point-tool is created
02543            * with this method, function should be called with new_style (below)
02544            * instead of HT_LINE | style case HT_POINT is handled specially
02545            * new_style := (_thd.next_drawstyle & HT_RECT) ? HT_LINE | style : _thd.next_drawstyle; */
02546           int heightdiff = CalcHeightdiff(HT_LINE | style, 0, t0, t1);
02547 
02548           params[index++] = distance;
02549           if (heightdiff != 0) params[index++] = heightdiff;
02550         }
02551 
02552         ShowMeasurementTooltips(measure_strings_length[index], index, params);
02553       } break;
02554 
02555     case VPM_X_AND_Y_LIMITED: { // drag an X by Y constrained rect area
02556       int limit = (_thd.sizelimit - 1) * TILE_SIZE;
02557       x = sx + Clamp(x - sx, -limit, limit);
02558       y = sy + Clamp(y - sy, -limit, limit);
02559       } // Fallthrough
02560     case VPM_X_AND_Y: { // drag an X by Y area
02561       if (_settings_client.gui.measure_tooltip) {
02562         static const StringID measure_strings_area[] = {
02563           STR_NULL, STR_NULL, STR_MEASURE_AREA, STR_MEASURE_AREA_HEIGHTDIFF
02564         };
02565 
02566         TileIndex t0 = TileVirtXY(sx, sy);
02567         TileIndex t1 = TileVirtXY(x, y);
02568         uint dx = Delta(TileX(t0), TileX(t1)) + 1;
02569         uint dy = Delta(TileY(t0), TileY(t1)) + 1;
02570         byte index = 0;
02571         uint64 params[3];
02572 
02573         /* If dragging an area (eg dynamite tool) and it is actually a single
02574          * row/column, change the type to 'line' to get proper calculation for height */
02575         style = (HighLightStyle)_thd.next_drawstyle;
02576         if (style & HT_RECT) {
02577           if (dx == 1) {
02578             style = HT_LINE | HT_DIR_Y;
02579           } else if (dy == 1) {
02580             style = HT_LINE | HT_DIR_X;
02581           }
02582         }
02583 
02584         if (dx != 1 || dy != 1) {
02585           int heightdiff = CalcHeightdiff(style, 0, t0, t1);
02586 
02587           params[index++] = dx;
02588           params[index++] = dy;
02589           if (heightdiff != 0) params[index++] = heightdiff;
02590         }
02591 
02592         ShowMeasurementTooltips(measure_strings_area[index], index, params);
02593       }
02594     break;
02595 
02596     }
02597     default: NOT_REACHED();
02598   }
02599 
02600   _thd.selend.x = x;
02601   _thd.selend.y = y;
02602 }
02603 
02608 bool VpHandlePlaceSizingDrag()
02609 {
02610   if (_special_mouse_mode != WSM_SIZING) return true;
02611 
02612   /* stop drag mode if the window has been closed */
02613   Window *w = FindWindowById(_thd.window_class, _thd.window_number);
02614   if (w == NULL) {
02615     ResetObjectToPlace();
02616     return false;
02617   }
02618 
02619   /* while dragging execute the drag procedure of the corresponding window (mostly VpSelectTilesWithMethod() ) */
02620   if (_left_button_down) {
02621     w->OnPlaceDrag(_thd.select_method, _thd.select_proc, GetTileBelowCursor());
02622     return false;
02623   }
02624 
02625   /* mouse button released..
02626    * keep the selected tool, but reset it to the original mode. */
02627   _special_mouse_mode = WSM_NONE;
02628   if (_thd.next_drawstyle == HT_RECT) {
02629     _thd.place_mode = HT_RECT;
02630   } else if (_thd.select_method & VPM_SIGNALDIRS) {
02631     _thd.place_mode = HT_RECT;
02632   } else if (_thd.select_method & VPM_RAILDIRS) {
02633     _thd.place_mode = (_thd.select_method & ~VPM_RAILDIRS) ? _thd.next_drawstyle : HT_RAIL;
02634   } else {
02635     _thd.place_mode = HT_POINT;
02636   }
02637   SetTileSelectSize(1, 1);
02638 
02639   w->OnPlaceMouseUp(_thd.select_method, _thd.select_proc, _thd.selend, TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y));
02640 
02641   return false;
02642 }
02643 
02644 void SetObjectToPlaceWnd(CursorID icon, SpriteID pal, HighLightStyle mode, Window *w)
02645 {
02646   SetObjectToPlace(icon, pal, mode, w->window_class, w->window_number);
02647 }
02648 
02649 #include "table/animcursors.h"
02650 
02651 void SetObjectToPlace(CursorID icon, SpriteID pal, HighLightStyle mode, WindowClass window_class, WindowNumber window_num)
02652 {
02653   /* undo clicking on button and drag & drop */
02654   if (_thd.place_mode != HT_NONE || _special_mouse_mode == WSM_DRAGDROP) {
02655     Window *w = FindWindowById(_thd.window_class, _thd.window_number);
02656     if (w != NULL) {
02657       /* Call the abort function, but set the window class to something
02658        * that will never be used to avoid infinite loops. Setting it to
02659        * the 'next' window class must not be done because recursion into
02660        * this function might in some cases reset the newly set object to
02661        * place or not properly reset the original selection. */
02662       _thd.window_class = WC_INVALID;
02663       w->OnPlaceObjectAbort();
02664     }
02665   }
02666 
02667   SetTileSelectSize(1, 1);
02668 
02669   _thd.make_square_red = false;
02670 
02671   if (mode == HT_DRAG) { // HT_DRAG is for dragdropping trains in the depot window
02672     mode = HT_NONE;
02673     _special_mouse_mode = WSM_DRAGDROP;
02674   } else {
02675     _special_mouse_mode = WSM_NONE;
02676   }
02677 
02678   _thd.place_mode = mode;
02679   _thd.window_class = window_class;
02680   _thd.window_number = window_num;
02681 
02682   if (mode == HT_SPECIAL) // special tools, like tunnels or docks start with presizing mode
02683     VpStartPreSizing();
02684 
02685   if ((int)icon < 0) {
02686     SetAnimatedMouseCursor(_animcursors[~icon]);
02687   } else {
02688     SetMouseCursor(icon, pal);
02689   }
02690 
02691 }
02692 
02693 void ResetObjectToPlace()
02694 {
02695   SetObjectToPlace(SPR_CURSOR_MOUSE, PAL_NONE, HT_NONE, WC_MAIN_WINDOW, 0);
02696 }

Generated on Wed Dec 30 20:40:09 2009 for OpenTTD by  doxygen 1.5.6