# viewport.cpp

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    00001 /* $Id: viewport.cpp 24228 2012-05-12 07:31:25Z 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 void MarkViewportDirty(const ViewPort *vp, int left, int top, int right, int bottom);
    00147
    00148 static ViewportDrawer _vd;
    00149
    00150 TileHighlightData _thd;
    00151 static TileInfo *_cur_ti;
    00152 bool _draw_bounding_boxes = false;
    00153
    00154 static Point MapXYZToViewport(const ViewPort *vp, int x, int y, int z)
    00155 {
    00156   Point p = RemapCoords(x, y, z);
    00157   p.x -= vp->virtual_width / 2;
    00158   p.y -= vp->virtual_height / 2;
    00159   return p;
    00160 }
    00161
    00162 void DeleteWindowViewport(Window *w)
    00163 {
    00164   free(w->viewport);
    00165   w->viewport = NULL;
    00166 }
    00167
    00180 void InitializeWindowViewport(Window *w, int x, int y,
    00181   int width, int height, uint32 follow_flags, ZoomLevel zoom)
    00182 {
    00183   assert(w->viewport == NULL);
    00184
    00185   ViewportData *vp = CallocT<ViewportData>(1);
    00186
    00187   vp->left = x + w->left;
    00188   vp->top = y + w->top;
    00189   vp->width = width;
    00190   vp->height = height;
    00191
    00192   vp->zoom = static_cast<ZoomLevel>(Clamp(zoom, _settings_client.gui.zoom_min, _settings_client.gui.zoom_max));
    00193
    00194   vp->virtual_width = ScaleByZoom(width, zoom);
    00195   vp->virtual_height = ScaleByZoom(height, zoom);
    00196
    00197   Point pt;
    00198
    00199   if (follow_flags & 0x80000000) {
    00200     const Vehicle *veh;
    00201
    00202     vp->follow_vehicle = (VehicleID)(follow_flags & 0xFFFFF);
    00203     veh = Vehicle::Get(vp->follow_vehicle);
    00204     pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
    00205   } else {
    00206     uint x = TileX(follow_flags) * TILE_SIZE;
    00207     uint y = TileY(follow_flags) * TILE_SIZE;
    00208
    00209     vp->follow_vehicle = INVALID_VEHICLE;
    00210     pt = MapXYZToViewport(vp, x, y, GetSlopePixelZ(x, y));
    00211   }
    00212
    00213   vp->scrollpos_x = pt.x;
    00214   vp->scrollpos_y = pt.y;
    00215   vp->dest_scrollpos_x = pt.x;
    00216   vp->dest_scrollpos_y = pt.y;
    00217
    00218   w->viewport = vp;
    00219   vp->virtual_left = 0;//pt.x;
    00220   vp->virtual_top = 0;//pt.y;
    00221 }
    00222
    00223 static Point _vp_move_offs;
    00224
    00225 static void DoSetViewportPosition(const Window *w, int left, int top, int width, int height)
    00226 {
    00227   FOR_ALL_WINDOWS_FROM_BACK_FROM(w, w) {
    00228     if (left + width > w->left &&
    00229         w->left + w->width > left &&
    00230         top + height > w->top &&
    00231         w->top + w->height > top) {
    00232
    00233       if (left < w->left) {
    00234         DoSetViewportPosition(w, left, top, w->left - left, height);
    00235         DoSetViewportPosition(w, left + (w->left - left), top, width - (w->left - left), height);
    00236         return;
    00237       }
    00238
    00239       if (left + width > w->left + w->width) {
    00240         DoSetViewportPosition(w, left, top, (w->left + w->width - left), height);
    00241         DoSetViewportPosition(w, left + (w->left + w->width - left), top, width - (w->left + w->width - left), height);
    00242         return;
    00243       }
    00244
    00245       if (top < w->top) {
    00246         DoSetViewportPosition(w, left, top, width, (w->top - top));
    00247         DoSetViewportPosition(w, left, top + (w->top - top), width, height - (w->top - top));
    00248         return;
    00249       }
    00250
    00251       if (top + height > w->top + w->height) {
    00252         DoSetViewportPosition(w, left, top, width, (w->top + w->height - top));
    00253         DoSetViewportPosition(w, left, top + (w->top + w->height - top), width, height - (w->top + w->height - top));
    00254         return;
    00255       }
    00256
    00257       return;
    00258     }
    00259   }
    00260
    00261   {
    00262     int xo = _vp_move_offs.x;
    00263     int yo = _vp_move_offs.y;
    00264
    00265     if (abs(xo) >= width || abs(yo) >= height) {
    00266       /* fully_outside */
    00267       RedrawScreenRect(left, top, left + width, top + height);
    00268       return;
    00269     }
    00270
    00271     GfxScroll(left, top, width, height, xo, yo);
    00272
    00273     if (xo > 0) {
    00274       RedrawScreenRect(left, top, xo + left, top + height);
    00275       left += xo;
    00276       width -= xo;
    00277     } else if (xo < 0) {
    00278       RedrawScreenRect(left + width + xo, top, left + width, top + height);
    00279       width += xo;
    00280     }
    00281
    00282     if (yo > 0) {
    00283       RedrawScreenRect(left, top, width + left, top + yo);
    00284     } else if (yo < 0) {
    00285       RedrawScreenRect(left, top + height + yo, width + left, top + height);
    00286     }
    00287   }
    00288 }
    00289
    00290 static void SetViewportPosition(Window *w, int x, int y)
    00291 {
    00292   ViewPort *vp = w->viewport;
    00293   int old_left = vp->virtual_left;
    00294   int old_top = vp->virtual_top;
    00295   int i;
    00296   int left, top, width, height;
    00297
    00298   vp->virtual_left = x;
    00299   vp->virtual_top = y;
    00300
    00301   /* Viewport is bound to its left top corner, so it must be rounded down (UnScaleByZoomLower)
    00302    * else glitch described in FS#1412 will happen (offset by 1 pixel with zoom level > NORMAL)
    00303    */
    00304   old_left = UnScaleByZoomLower(old_left, vp->zoom);
    00305   old_top = UnScaleByZoomLower(old_top, vp->zoom);
    00306   x = UnScaleByZoomLower(x, vp->zoom);
    00307   y = UnScaleByZoomLower(y, vp->zoom);
    00308
    00309   old_left -= x;
    00310   old_top -= y;
    00311
    00312   if (old_top == 0 && old_left == 0) return;
    00313
    00314   _vp_move_offs.x = old_left;
    00315   _vp_move_offs.y = old_top;
    00316
    00317   left = vp->left;
    00318   top = vp->top;
    00319   width = vp->width;
    00320   height = vp->height;
    00321
    00322   if (left < 0) {
    00323     width += left;
    00324     left = 0;
    00325   }
    00326
    00327   i = left + width - _screen.width;
    00328   if (i >= 0) width -= i;
    00329
    00330   if (width > 0) {
    00331     if (top < 0) {
    00332       height += top;
    00333       top = 0;
    00334     }
    00335
    00336     i = top + height - _screen.height;
    00337     if (i >= 0) height -= i;
    00338
    00339     if (height > 0) DoSetViewportPosition(w->z_front, left, top, width, height);
    00340   }
    00341 }
    00342
    00351 ViewPort *IsPtInWindowViewport(const Window *w, int x, int y)
    00352 {
    00353   ViewPort *vp = w->viewport;
    00354
    00355   if (vp != NULL &&
    00356       IsInsideMM(x, vp->left, vp->left + vp->width) &&
    00357       IsInsideMM(y, vp->top, vp->top + vp->height))
    00358     return vp;
    00359
    00360   return NULL;
    00361 }
    00362
    00370 static Point TranslateXYToTileCoord(const ViewPort *vp, int x, int y)
    00371 {
    00372   Point pt;
    00373   int a, b;
    00374   int 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 + ZOOM_LVL_SHIFT);
    00383   y = (ScaleByZoom(y, vp->zoom) + vp->virtual_top) >> (1 + ZOOM_LVL_SHIFT);
    00384
    00385   a = y - x;
    00386   b = y + x;
    00387
    00388   /* we need to move variables in to the valid range, as the
    00389    * GetTileZoomCenterWindow() function can call here with invalid x and/or y,
    00390    * when the user tries to zoom out along the sides of the map */
    00391   a = Clamp(a, -4 * (int)TILE_SIZE, (int)(MapMaxX() * TILE_SIZE) - 1);
    00392   b = Clamp(b, -4 * (int)TILE_SIZE, (int)(MapMaxY() * TILE_SIZE) - 1);
    00393
    00394   /* (a, b) is the X/Y-world coordinate that belongs to (x,y) if the landscape would be completely flat on height 0.
    00395    * Now find the Z-world coordinate by fix point iteration.
    00396    * This is a bit tricky because the tile height is non-continuous at foundations.
    00397    * The clicked point should be approached from the back, otherwise there are regions that are not clickable.
    00398    * (FOUNDATION_HALFTILE_LOWER on SLOPE_STEEP_S hides north halftile completely)
    00399    * So give it a z-malus of 4 in the first iterations.
    00400    */
    00401   z = 0;
    00402
    00403   int min_coord = _settings_game.construction.freeform_edges ? TILE_SIZE : 0;
    00404
    00405   for (int i = 0; i < 5; i++) z = GetSlopePixelZ(Clamp(a + max(z, 4) - 4, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + max(z, 4) - 4, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
    00406   for (int malus = 3; malus > 0; malus--) z = GetSlopePixelZ(Clamp(a + max(z, malus) - malus, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + max(z, malus) - malus, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
    00407   for (int i = 0; i < 5; i++) z = GetSlopePixelZ(Clamp(a + z, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + z, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
    00408
    00409   pt.x = Clamp(a + z, min_coord, MapMaxX() * TILE_SIZE - 1);
    00410   pt.y = Clamp(b + z, min_coord, MapMaxY() * TILE_SIZE - 1);
    00411
    00412   return pt;
    00413 }
    00414
    00415 /* When used for zooming, check area below current coordinates (x,y)
    00416  * and return the tile of the zoomed out/in position (zoom_x, zoom_y)
    00417  * when you just want the tile, make x = zoom_x and y = zoom_y */
    00418 static Point GetTileFromScreenXY(int x, int y, int zoom_x, int zoom_y)
    00419 {
    00420   Window *w;
    00421   ViewPort *vp;
    00422   Point pt;
    00423
    00424   if ( (w = FindWindowFromPt(x, y)) != NULL &&
    00425        (vp = IsPtInWindowViewport(w, x, y)) != NULL)
    00426         return TranslateXYToTileCoord(vp, zoom_x, zoom_y);
    00427
    00428   pt.y = pt.x = -1;
    00429   return pt;
    00430 }
    00431
    00432 Point GetTileBelowCursor()
    00433 {
    00434   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, _cursor.pos.x, _cursor.pos.y);
    00435 }
    00436
    00437
    00438 Point GetTileZoomCenterWindow(bool in, Window * w)
    00439 {
    00440   int x, y;
    00441   ViewPort *vp = w->viewport;
    00442
    00443   if (in) {
    00444     x = ((_cursor.pos.x - vp->left) >> 1) + (vp->width >> 2);
    00445     y = ((_cursor.pos.y - vp->top) >> 1) + (vp->height >> 2);
    00446   } else {
    00447     x = vp->width - (_cursor.pos.x - vp->left);
    00448     y = vp->height - (_cursor.pos.y - vp->top);
    00449   }
    00450   /* Get the tile below the cursor and center on the zoomed-out center */
    00451   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, x + vp->left, y + vp->top);
    00452 }
    00453
    00462 void HandleZoomMessage(Window *w, const ViewPort *vp, byte widget_zoom_in, byte widget_zoom_out)
    00463 {
    00464   w->SetWidgetDisabledState(widget_zoom_in, vp->zoom <= _settings_client.gui.zoom_min);
    00465   w->SetWidgetDirty(widget_zoom_in);
    00466
    00467   w->SetWidgetDisabledState(widget_zoom_out, vp->zoom >= _settings_client.gui.zoom_max);
    00468   w->SetWidgetDirty(widget_zoom_out);
    00469 }
    00470
    00483 static void AddTileSpriteToDraw(SpriteID image, PaletteID pal, int32 x, int32 y, int z, const SubSprite *sub = NULL, int extra_offs_x = 0, int extra_offs_y = 0)
    00484 {
    00485   assert((image & SPRITE_MASK) < MAX_SPRITES);
    00486
    00487   TileSpriteToDraw *ts = _vd.tile_sprites_to_draw.Append();
    00488   ts->image = image;
    00489   ts->pal = pal;
    00490   ts->sub = sub;
    00491   Point pt = RemapCoords(x, y, z);
    00492   ts->x = pt.x + extra_offs_x;
    00493   ts->y = pt.y + extra_offs_y;
    00494 }
    00495
    00508 static void AddChildSpriteToFoundation(SpriteID image, PaletteID pal, const SubSprite *sub, FoundationPart foundation_part, int extra_offs_x, int extra_offs_y)
    00509 {
    00510   assert(IsInsideMM(foundation_part, 0, FOUNDATION_PART_END));
    00511   assert(_vd.foundation[foundation_part] != -1);
    00512   Point offs = _vd.foundation_offset[foundation_part];
    00513
    00514   /* Change the active ChildSprite list to the one of the foundation */
    00515   int *old_child = _vd.last_child;
    00516   _vd.last_child = _vd.last_foundation_child[foundation_part];
    00517
    00518   AddChildSpriteScreen(image, pal, offs.x + extra_offs_x, offs.y + extra_offs_y, false, sub, false);
    00519
    00520   /* Switch back to last ChildSprite list */
    00521   _vd.last_child = old_child;
    00522 }
    00523
    00537 void DrawGroundSpriteAt(SpriteID image, PaletteID pal, int32 x, int32 y, int z, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
    00538 {
    00539   /* Switch to first foundation part, if no foundation was drawn */
    00540   if (_vd.foundation_part == FOUNDATION_PART_NONE) _vd.foundation_part = FOUNDATION_PART_NORMAL;
    00541
    00542   if (_vd.foundation[_vd.foundation_part] != -1) {
    00543     Point pt = RemapCoords(x, y, z);
    00544     AddChildSpriteToFoundation(image, pal, sub, _vd.foundation_part, pt.x + extra_offs_x * ZOOM_LVL_BASE, pt.y + extra_offs_y * ZOOM_LVL_BASE);
    00545   } else {
    00546     AddTileSpriteToDraw(image, pal, _cur_ti->x + x, _cur_ti->y + y, _cur_ti->z + z, sub, extra_offs_x * ZOOM_LVL_BASE, extra_offs_y * ZOOM_LVL_BASE);
    00547   }
    00548 }
    00549
    00560 void DrawGroundSprite(SpriteID image, PaletteID pal, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
    00561 {
    00562   DrawGroundSpriteAt(image, pal, 0, 0, 0, sub, extra_offs_x, extra_offs_y);
    00563 }
    00564
    00572 void OffsetGroundSprite(int x, int y)
    00573 {
    00574   /* Switch to next foundation part */
    00575   switch (_vd.foundation_part) {
    00576     case FOUNDATION_PART_NONE:
    00577       _vd.foundation_part = FOUNDATION_PART_NORMAL;
    00578       break;
    00579     case FOUNDATION_PART_NORMAL:
    00580       _vd.foundation_part = FOUNDATION_PART_HALFTILE;
    00581       break;
    00582     default: NOT_REACHED();
    00583   }
    00584
    00585   /* _vd.last_child == NULL if foundation sprite was clipped by the viewport bounds */
    00586   if (_vd.last_child != NULL) _vd.foundation[_vd.foundation_part] = _vd.parent_sprites_to_draw.Length() - 1;
    00587
    00588   _vd.foundation_offset[_vd.foundation_part].x = x * ZOOM_LVL_BASE;
    00589   _vd.foundation_offset[_vd.foundation_part].y = y * ZOOM_LVL_BASE;
    00590   _vd.last_foundation_child[_vd.foundation_part] = _vd.last_child;
    00591 }
    00592
    00604 static void AddCombinedSprite(SpriteID image, PaletteID pal, int x, int y, int z, const SubSprite *sub)
    00605 {
    00606   Point pt = RemapCoords(x, y, z);
    00607   const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
    00608
    00609   if (pt.x + spr->x_offs >= _vd.dpi.left + _vd.dpi.width ||
    00610       pt.x + spr->x_offs + spr->width <= _vd.dpi.left ||
    00611       pt.y + spr->y_offs >= _vd.dpi.top + _vd.dpi.height ||
    00612       pt.y + spr->y_offs + spr->height <= _vd.dpi.top)
    00613     return;
    00614
    00615   const ParentSpriteToDraw *pstd = _vd.parent_sprites_to_draw.End() - 1;
    00616   AddChildSpriteScreen(image, pal, pt.x - pstd->left, pt.y - pstd->top, false, sub, false);
    00617 }
    00618
    00644 void AddSortableSpriteToDraw(SpriteID image, PaletteID pal, int x, int y, int w, int h, int dz, int z, bool transparent, int bb_offset_x, int bb_offset_y, int bb_offset_z, const SubSprite *sub)
    00645 {
    00646   int32 left, right, top, bottom;
    00647
    00648   assert((image & SPRITE_MASK) < MAX_SPRITES);
    00649
    00650   /* make the sprites transparent with the right palette */
    00651   if (transparent) {
    00652     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
    00653     pal = PALETTE_TO_TRANSPARENT;
    00654   }
    00655
    00656   if (_vd.combine_sprites == SPRITE_COMBINE_ACTIVE) {
    00657     AddCombinedSprite(image, pal, x, y, z, sub);
    00658     return;
    00659   }
    00660
    00661   _vd.last_child = NULL;
    00662
    00663   Point pt = RemapCoords(x, y, z);
    00664   int tmp_left, tmp_top, tmp_x = pt.x, tmp_y = pt.y;
    00665
    00666   /* Compute screen extents of sprite */
    00667   if (image == SPR_EMPTY_BOUNDING_BOX) {
    00668     left = tmp_left = RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x;
    00669     right           = RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1;
    00670     top  = tmp_top  = RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y;
    00671     bottom          = RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1;
    00672   } else {
    00673     const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
    00674     left = tmp_left = (pt.x += spr->x_offs);
    00675     right           = (pt.x +  spr->width );
    00676     top  = tmp_top  = (pt.y += spr->y_offs);
    00677     bottom          = (pt.y +  spr->height);
    00678   }
    00679
    00680   if (_draw_bounding_boxes && (image != SPR_EMPTY_BOUNDING_BOX)) {
    00681     /* Compute maximal extents of sprite and its bounding box */
    00682     left   = min(left  , RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x);
    00683     right  = max(right , RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1);
    00684     top    = min(top   , RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y);
    00685     bottom = max(bottom, RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1);
    00686   }
    00687
    00688   /* Do not add the sprite to the viewport, if it is outside */
    00689   if (left   >= _vd.dpi.left + _vd.dpi.width ||
    00690       right  <= _vd.dpi.left                 ||
    00691       top    >= _vd.dpi.top + _vd.dpi.height ||
    00692       bottom <= _vd.dpi.top) {
    00693     return;
    00694   }
    00695
    00696   ParentSpriteToDraw *ps = _vd.parent_sprites_to_draw.Append();
    00697   ps->x = tmp_x;
    00698   ps->y = tmp_y;
    00699
    00700   ps->left = tmp_left;
    00701   ps->top  = tmp_top;
    00702
    00703   ps->image = image;
    00704   ps->pal = pal;
    00705   ps->sub = sub;
    00706   ps->xmin = x + bb_offset_x;
    00707   ps->xmax = x + max(bb_offset_x, w) - 1;
    00708
    00709   ps->ymin = y + bb_offset_y;
    00710   ps->ymax = y + max(bb_offset_y, h) - 1;
    00711
    00712   ps->zmin = z + bb_offset_z;
    00713   ps->zmax = z + max(bb_offset_z, dz) - 1;
    00714
    00715   ps->comparison_done = false;
    00716   ps->first_child = -1;
    00717
    00718   _vd.last_child = &ps->first_child;
    00719
    00720   if (_vd.combine_sprites == SPRITE_COMBINE_PENDING) _vd.combine_sprites = SPRITE_COMBINE_ACTIVE;
    00721 }
    00722
    00741 void StartSpriteCombine()
    00742 {
    00743   assert(_vd.combine_sprites == SPRITE_COMBINE_NONE);
    00744   _vd.combine_sprites = SPRITE_COMBINE_PENDING;
    00745 }
    00746
    00751 void EndSpriteCombine()
    00752 {
    00753   assert(_vd.combine_sprites != SPRITE_COMBINE_NONE);
    00754   _vd.combine_sprites = SPRITE_COMBINE_NONE;
    00755 }
    00756
    00766 static bool IsInRangeInclusive(int begin, int end, int check)
    00767 {
    00768   if (begin > end) Swap(begin, end);
    00769   return begin <= check && check <= end;
    00770 }
    00771
    00778 bool IsInsideRotatedRectangle(int x, int y)
    00779 {
    00780   int dist_a = (_thd.size.x + _thd.size.y);      // Rotated coordinate system for selected rectangle.
    00781   int dist_b = (_thd.size.x - _thd.size.y);      // We don't have to divide by 2. It's all relative!
    00782   int a = ((x - _thd.pos.x) + (y - _thd.pos.y)); // Rotated coordinate system for the point under scrutiny.
    00783   int b = ((x - _thd.pos.x) - (y - _thd.pos.y));
    00784
    00785   /* Check if a and b are between 0 and dist_a or dist_b respectively. */
    00786   return IsInRangeInclusive(dist_a, 0, a) && IsInRangeInclusive(dist_b, 0, b);
    00787 }
    00788
    00799 void AddChildSpriteScreen(SpriteID image, PaletteID pal, int x, int y, bool transparent, const SubSprite *sub, bool scale)
    00800 {
    00801   assert((image & SPRITE_MASK) < MAX_SPRITES);
    00802
    00803   /* If the ParentSprite was clipped by the viewport bounds, do not draw the ChildSprites either */
    00804   if (_vd.last_child == NULL) return;
    00805
    00806   /* make the sprites transparent with the right palette */
    00807   if (transparent) {
    00808     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
    00809     pal = PALETTE_TO_TRANSPARENT;
    00810   }
    00811
    00812   *_vd.last_child = _vd.child_screen_sprites_to_draw.Length();
    00813
    00814   ChildScreenSpriteToDraw *cs = _vd.child_screen_sprites_to_draw.Append();
    00815   cs->image = image;
    00816   cs->pal = pal;
    00817   cs->sub = sub;
    00818   cs->x = scale ? x * ZOOM_LVL_BASE : x;
    00819   cs->y = scale ? y * ZOOM_LVL_BASE : y;
    00820   cs->next = -1;
    00821
    00822   /* Append the sprite to the active ChildSprite list.
    00823    * If the active ParentSprite is a foundation, update last_foundation_child as well.
    00824    * Note: ChildSprites of foundations are NOT sequential in the vector, as selection sprites are added at last. */
    00825   if (_vd.last_foundation_child[0] == _vd.last_child) _vd.last_foundation_child[0] = &cs->next;
    00826   if (_vd.last_foundation_child[1] == _vd.last_child) _vd.last_foundation_child[1] = &cs->next;
    00827   _vd.last_child = &cs->next;
    00828 }
    00829
    00830 static void AddStringToDraw(int x, int y, StringID string, uint64 params_1, uint64 params_2, Colours colour, uint16 width)
    00831 {
    00832   assert(width != 0);
    00833   StringSpriteToDraw *ss = _vd.string_sprites_to_draw.Append();
    00834   ss->string = string;
    00835   ss->x = x;
    00836   ss->y = y;
    00837   ss->params[0] = params_1;
    00838   ss->params[1] = params_2;
    00839   ss->width = width;
    00840   ss->colour = colour;
    00841 }
    00842
    00843
    00855 static void DrawSelectionSprite(SpriteID image, PaletteID pal, const TileInfo *ti, int z_offset, FoundationPart foundation_part)
    00856 {
    00857   /* FIXME: This is not totally valid for some autorail highlights that extend over the edges of the tile. */
    00858   if (_vd.foundation[foundation_part] == -1) {
    00859     /* draw on real ground */
    00860     AddTileSpriteToDraw(image, pal, ti->x, ti->y, ti->z + z_offset);
    00861   } else {
    00862     /* draw on top of foundation */
    00863     AddChildSpriteToFoundation(image, pal, NULL, foundation_part, 0, -z_offset * ZOOM_LVL_BASE);
    00864   }
    00865 }
    00866
    00873 static void DrawTileSelectionRect(const TileInfo *ti, PaletteID pal)
    00874 {
    00875   if (!IsValidTile(ti->tile)) return;
    00876
    00877   SpriteID sel;
    00878   if (IsHalftileSlope(ti->tileh)) {
    00879     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
    00880     SpriteID sel2 = SPR_HALFTILE_SELECTION_FLAT + halftile_corner;
    00881     DrawSelectionSprite(sel2, pal, ti, 7 + TILE_HEIGHT, FOUNDATION_PART_HALFTILE);
    00882
    00883     Corner opposite_corner = OppositeCorner(halftile_corner);
    00884     if (IsSteepSlope(ti->tileh)) {
    00885       sel = SPR_HALFTILE_SELECTION_DOWN;
    00886     } else {
    00887       sel = ((ti->tileh & SlopeWithOneCornerRaised(opposite_corner)) != 0 ? SPR_HALFTILE_SELECTION_UP : SPR_HALFTILE_SELECTION_FLAT);
    00888     }
    00889     sel += opposite_corner;
    00890   } else {
    00891     sel = SPR_SELECT_TILE + SlopeToSpriteOffset(ti->tileh);
    00892   }
    00893   DrawSelectionSprite(sel, pal, ti, 7, FOUNDATION_PART_NORMAL);
    00894 }
    00895
    00896 static bool IsPartOfAutoLine(int px, int py)
    00897 {
    00898   px -= _thd.selstart.x;
    00899   py -= _thd.selstart.y;
    00900
    00901   if ((_thd.drawstyle & HT_DRAG_MASK) != HT_LINE) return false;
    00902
    00903   switch (_thd.drawstyle & HT_DIR_MASK) {
    00904     case HT_DIR_X:  return py == 0; // x direction
    00905     case HT_DIR_Y:  return px == 0; // y direction
    00906     case HT_DIR_HU: return px == -py || px == -py - 16; // horizontal upper
    00907     case HT_DIR_HL: return px == -py || px == -py + 16; // horizontal lower
    00908     case HT_DIR_VL: return px == py || px == py + 16; // vertical left
    00909     case HT_DIR_VR: return px == py || px == py - 16; // vertical right
    00910     default:
    00911       NOT_REACHED();
    00912   }
    00913 }
    00914
    00915 /* [direction][side] */
    00916 static const HighLightStyle _autorail_type[6][2] = {
    00917   { HT_DIR_X,  HT_DIR_X },
    00918   { HT_DIR_Y,  HT_DIR_Y },
    00919   { HT_DIR_HU, HT_DIR_HL },
    00920   { HT_DIR_HL, HT_DIR_HU },
    00921   { HT_DIR_VL, HT_DIR_VR },
    00922   { HT_DIR_VR, HT_DIR_VL }
    00923 };
    00924
    00925 #include "table/autorail.h"
    00926
    00933 static void DrawAutorailSelection(const TileInfo *ti, uint autorail_type)
    00934 {
    00935   SpriteID image;
    00936   PaletteID pal;
    00937   int offset;
    00938
    00939   FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
    00940   Slope autorail_tileh = RemoveHalftileSlope(ti->tileh);
    00941   if (IsHalftileSlope(ti->tileh)) {
    00942     static const uint _lower_rail[4] = { 5U, 2U, 4U, 3U };
    00943     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
    00944     if (autorail_type != _lower_rail[halftile_corner]) {
    00945       foundation_part = FOUNDATION_PART_HALFTILE;
    00946       /* Here we draw the highlights of the "three-corners-raised"-slope. That looks ok to me. */
    00947       autorail_tileh = SlopeWithThreeCornersRaised(OppositeCorner(halftile_corner));
    00948     }
    00949   }
    00950
    00951   offset = _AutorailTilehSprite[autorail_tileh][autorail_type];
    00952   if (offset >= 0) {
    00953     image = SPR_AUTORAIL_BASE + offset;
    00954     pal = PAL_NONE;
    00955   } else {
    00956     image = SPR_AUTORAIL_BASE - offset;
    00957     pal = PALETTE_SEL_TILE_RED;
    00958   }
    00959
    00960   DrawSelectionSprite(image, _thd.make_square_red ? PALETTE_SEL_TILE_RED : pal, ti, 7, foundation_part);
    00961 }
    00962
    00967 static void DrawTileSelection(const TileInfo *ti)
    00968 {
    00969   /* Draw a red error square? */
    00970   bool is_redsq = _thd.redsq == ti->tile;
    00971   if (is_redsq) DrawTileSelectionRect(ti, PALETTE_TILE_RED_PULSATING);
    00972
    00973   /* No tile selection active? */
    00974   if ((_thd.drawstyle & HT_DRAG_MASK) == HT_NONE) return;
    00975
    00976   if (_thd.diagonal) { // We're drawing a 45 degrees rotated (diagonal) rectangle
    00977     if (IsInsideRotatedRectangle((int)ti->x, (int)ti->y)) goto draw_inner;
    00978     return;
    00979   }
    00980
    00981   /* Inside the inner area? */
    00982   if (IsInsideBS(ti->x, _thd.pos.x, _thd.size.x) &&
    00983       IsInsideBS(ti->y, _thd.pos.y, _thd.size.y)) {
    00984 draw_inner:
    00985     if (_thd.drawstyle & HT_RECT) {
    00986       if (!is_redsq) DrawTileSelectionRect(ti, _thd.make_square_red ? PALETTE_SEL_TILE_RED : PAL_NONE);
    00987     } else if (_thd.drawstyle & HT_POINT) {
    00988       /* Figure out the Z coordinate for the single dot. */
    00989       int z = 0;
    00990       FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
    00991       if (ti->tileh & SLOPE_N) {
    00992         z += TILE_HEIGHT;
    00993         if (RemoveHalftileSlope(ti->tileh) == SLOPE_STEEP_N) z += TILE_HEIGHT;
    00994       }
    00995       if (IsHalftileSlope(ti->tileh)) {
    00996         Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
    00997         if ((halftile_corner == CORNER_W) || (halftile_corner == CORNER_E)) z += TILE_HEIGHT;
    00998         if (halftile_corner != CORNER_S) {
    00999           foundation_part = FOUNDATION_PART_HALFTILE;
    01000           if (IsSteepSlope(ti->tileh)) z -= TILE_HEIGHT;
    01001         }
    01002       }
    01003       DrawSelectionSprite(_cur_dpi->zoom <= ZOOM_LVL_DETAIL ? SPR_DOT : SPR_DOT_SMALL, PAL_NONE, ti, z, foundation_part);
    01004     } else if (_thd.drawstyle & HT_RAIL) {
    01005       /* autorail highlight piece under cursor */
    01006       HighLightStyle type = _thd.drawstyle & HT_DIR_MASK;
    01007       assert(type < HT_DIR_END);
    01008       DrawAutorailSelection(ti, _autorail_type[type][0]);
    01009     } else if (IsPartOfAutoLine(ti->x, ti->y)) {
    01010       /* autorail highlighting long line */
    01011       HighLightStyle dir = _thd.drawstyle & HT_DIR_MASK;
    01012       uint side;
    01013
    01014       if (dir == HT_DIR_X || dir == HT_DIR_Y) {
    01015         side = 0;
    01016       } else {
    01017         TileIndex start = TileVirtXY(_thd.selstart.x, _thd.selstart.y);
    01018         side = Delta(Delta(TileX(start), TileX(ti->tile)), Delta(TileY(start), TileY(ti->tile)));
    01019       }
    01020
    01021       DrawAutorailSelection(ti, _autorail_type[dir][side]);
    01022     }
    01023     return;
    01024   }
    01025
    01026   /* Check if it's inside the outer area? */
    01027   if (!is_redsq && _thd.outersize.x > 0 &&
    01028       IsInsideBS(ti->x, _thd.pos.x + _thd.offs.x, _thd.size.x + _thd.outersize.x) &&
    01029       IsInsideBS(ti->y, _thd.pos.y + _thd.offs.y, _thd.size.y + _thd.outersize.y)) {
    01030     /* Draw a blue rect. */
    01031     DrawTileSelectionRect(ti, PALETTE_SEL_TILE_BLUE);
    01032     return;
    01033   }
    01034 }
    01035
    01036 static void ViewportAddLandscape()
    01037 {
    01038   int x, y, width, height;
    01039   TileInfo ti;
    01040   bool direction;
    01041
    01042   _cur_ti = &ti;
    01043
    01044   /* Transform into tile coordinates and round to closest full tile */
    01045   x = ((_vd.dpi.top >> (1 + ZOOM_LVL_SHIFT)) - (_vd.dpi.left >> (2 + ZOOM_LVL_SHIFT))) & ~TILE_UNIT_MASK;
    01046   y = ((_vd.dpi.top >> (1 + ZOOM_LVL_SHIFT)) + (_vd.dpi.left >> (2 + ZOOM_LVL_SHIFT)) - TILE_SIZE) & ~TILE_UNIT_MASK;
    01047
    01048   /* determine size of area */
    01049   {
    01050     Point pt = RemapCoords(x, y, 241);
    01051     width = (_vd.dpi.left + _vd.dpi.width - pt.x + 95 * ZOOM_LVL_BASE) >> (6 + ZOOM_LVL_SHIFT);
    01052     height = (_vd.dpi.top + _vd.dpi.height - pt.y) >> (5 + ZOOM_LVL_SHIFT) << 1;
    01053   }
    01054
    01055   assert(width > 0);
    01056   assert(height > 0);
    01057
    01058   direction = false;
    01059
    01060   do {
    01061     int width_cur = width;
    01062     uint x_cur = x;
    01063     uint y_cur = y;
    01064
    01065     do {
    01066       TileType tt = MP_VOID;
    01067
    01068       ti.x = x_cur;
    01069       ti.y = y_cur;
    01070
    01071       ti.z = 0;
    01072
    01073       ti.tileh = SLOPE_FLAT;
    01074       ti.tile = INVALID_TILE;
    01075
    01076       if (x_cur < MapMaxX() * TILE_SIZE &&
    01077           y_cur < MapMaxY() * TILE_SIZE) {
    01078         TileIndex tile = TileVirtXY(x_cur, y_cur);
    01079
    01080         if (!_settings_game.construction.freeform_edges || (TileX(tile) != 0 && TileY(tile) != 0)) {
    01081           if (x_cur == ((int)MapMaxX() - 1) * TILE_SIZE || y_cur == ((int)MapMaxY() - 1) * TILE_SIZE) {
    01082             uint maxh = max<uint>(TileHeight(tile), 1);
    01083             for (uint h = 0; h < maxh; h++) {
    01084               AddTileSpriteToDraw(SPR_SHADOW_CELL, PAL_NONE, ti.x, ti.y, h * TILE_HEIGHT);
    01085             }
    01086           }
    01087
    01088           ti.tile = tile;
    01089           ti.tileh = GetTilePixelSlope(tile, &ti.z);
    01090           tt = GetTileType(tile);
    01091         }
    01092       }
    01093
    01094       _vd.foundation_part = FOUNDATION_PART_NONE;
    01095       _vd.foundation[0] = -1;
    01096       _vd.foundation[1] = -1;
    01097       _vd.last_foundation_child[0] = NULL;
    01098       _vd.last_foundation_child[1] = NULL;
    01099
    01100       _tile_type_procs[tt]->draw_tile_proc(&ti);
    01101
    01102       if ((x_cur == (int)MapMaxX() * TILE_SIZE && IsInsideMM(y_cur, 0, MapMaxY() * TILE_SIZE + 1)) ||
    01103           (y_cur == (int)MapMaxY() * TILE_SIZE && IsInsideMM(x_cur, 0, MapMaxX() * TILE_SIZE + 1))) {
    01104         TileIndex tile = TileVirtXY(x_cur, y_cur);
    01105         ti.tile = tile;
    01106         ti.tileh = GetTilePixelSlope(tile, &ti.z);
    01107         tt = GetTileType(tile);
    01108       }
    01109       if (ti.tile != INVALID_TILE) DrawTileSelection(&ti);
    01110
    01111       y_cur += 0x10;
    01112       x_cur -= 0x10;
    01113     } while (--width_cur);
    01114
    01115     if ((direction ^= 1) != 0) {
    01116       y += 0x10;
    01117     } else {
    01118       x += 0x10;
    01119     }
    01120   } while (--height);
    01121 }
    01122
    01133 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)
    01134 {
    01135   bool small = dpi->zoom >= small_from;
    01136
    01137   int left   = dpi->left;
    01138   int top    = dpi->top;
    01139   int right  = left + dpi->width;
    01140   int bottom = top + dpi->height;
    01141
    01142   int sign_height     = ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM, dpi->zoom);
    01143   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, dpi->zoom);
    01144
    01145   if (bottom < sign->top ||
    01146       top   > sign->top + sign_height ||
    01147       right < sign->center - sign_half_width ||
    01148       left  > sign->center + sign_half_width) {
    01149     return;
    01150   }
    01151
    01152   if (!small) {
    01153     AddStringToDraw(sign->center - sign_half_width, sign->top, string_normal, params_1, params_2, colour, sign->width_normal);
    01154   } else {
    01155     int shadow_offset = 0;
    01156     if (string_small_shadow != STR_NULL) {
    01157       shadow_offset = 4;
    01158       AddStringToDraw(sign->center - sign_half_width + shadow_offset, sign->top, string_small_shadow, params_1, params_2, INVALID_COLOUR, sign->width_small);
    01159     }
    01160     AddStringToDraw(sign->center - sign_half_width, sign->top - shadow_offset, string_small, params_1, params_2,
    01161         colour, sign->width_small | 0x8000);
    01162   }
    01163 }
    01164
    01165 static void ViewportAddTownNames(DrawPixelInfo *dpi)
    01166 {
    01167   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES) || _game_mode == GM_MENU) return;
    01168
    01169   const Town *t;
    01170   FOR_ALL_TOWNS(t) {
    01171     ViewportAddString(dpi, ZOOM_LVL_OUT_16X, &t->cache.sign,
    01172         _settings_client.gui.population_in_label ? STR_VIEWPORT_TOWN_POP : STR_VIEWPORT_TOWN,
    01173         STR_VIEWPORT_TOWN_TINY_WHITE, STR_VIEWPORT_TOWN_TINY_BLACK,
    01174         t->index, t->cache.population);
    01175   }
    01176 }
    01177
    01178
    01179 static void ViewportAddStationNames(DrawPixelInfo *dpi)
    01180 {
    01181   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || _game_mode == GM_MENU) return;
    01182
    01183   const BaseStation *st;
    01184   FOR_ALL_BASE_STATIONS(st) {
    01185     /* Check whether the base station is a station or a waypoint */
    01186     bool is_station = Station::IsExpected(st);
    01187
    01188     /* Don't draw if the display options are disabled */
    01189     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
    01190
    01191     /* Don't draw if station is owned by another company and competitor station names are hidden. Stations owned by none are never ignored. */
    01192     if (!HasBit(_display_opt, DO_SHOW_COMPETITOR_SIGNS) && _local_company != st->owner && st->owner != OWNER_NONE) continue;
    01193
    01194     ViewportAddString(dpi, ZOOM_LVL_OUT_16X, &st->sign,
    01195         is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT,
    01196         (is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT) + 1, STR_NULL,
    01197         st->index, st->facilities, (st->owner == OWNER_NONE || !st->IsInUse()) ? COLOUR_GREY : _company_colours[st->owner]);
    01198   }
    01199 }
    01200
    01201
    01202 static void ViewportAddSigns(DrawPixelInfo *dpi)
    01203 {
    01204   /* Signs are turned off or are invisible */
    01205   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS)) return;
    01206
    01207   const Sign *si;
    01208   FOR_ALL_SIGNS(si) {
    01209     /* Don't draw if sign is owned by another company and competitor signs should be hidden.
    01210      * Note: It is intentional that also signs owned by OWNER_NONE are hidden. Bankrupt
    01211      * companies can leave OWNER_NONE signs after them. */
    01212     if (!HasBit(_display_opt, DO_SHOW_COMPETITOR_SIGNS) && _local_company != si->owner && si->owner != OWNER_DEITY) continue;
    01213
    01214     ViewportAddString(dpi, ZOOM_LVL_OUT_16X, &si->sign,
    01215         STR_WHITE_SIGN,
    01216         (IsTransparencySet(TO_SIGNS) || si->owner == OWNER_DEITY) ? STR_VIEWPORT_SIGN_SMALL_WHITE : STR_VIEWPORT_SIGN_SMALL_BLACK, STR_NULL,
    01217         si->index, 0, (si->owner == OWNER_NONE) ? COLOUR_GREY : (si->owner == OWNER_DEITY ? INVALID_COLOUR : _company_colours[si->owner]));
    01218   }
    01219 }
    01220
    01227 void ViewportSign::UpdatePosition(int center, int top, StringID str)
    01228 {
    01229   if (this->width_normal != 0) this->MarkDirty();
    01230
    01231   this->top = top;
    01232
    01233   char buffer[DRAW_STRING_BUFFER];
    01234
    01235   GetString(buffer, str, lastof(buffer));
    01236   this->width_normal = VPSM_LEFT + Align(GetStringBoundingBox(buffer).width, 2) + VPSM_RIGHT;
    01237   this->center = center;
    01238
    01239   /* zoomed out version */
    01240   this->width_small = VPSM_LEFT + Align(GetStringBoundingBox(buffer, FS_SMALL).width, 2) + VPSM_RIGHT;
    01241
    01242   this->MarkDirty();
    01243 }
    01244
    01251 void ViewportSign::MarkDirty(ZoomLevel maxzoom) const
    01252 {
    01253   Rect zoomlevels[ZOOM_LVL_COUNT];
    01254
    01255   for (ZoomLevel zoom = ZOOM_LVL_BEGIN; zoom != ZOOM_LVL_END; zoom++) {
    01256     /* FIXME: This doesn't switch to width_small when appropriate. */
    01257     zoomlevels[zoom].left   = this->center - ScaleByZoom(this->width_normal / 2 + 1, zoom);
    01258     zoomlevels[zoom].top    = this->top    - ScaleByZoom(1, zoom);
    01259     zoomlevels[zoom].right  = this->center + ScaleByZoom(this->width_normal / 2 + 1, zoom);
    01260     zoomlevels[zoom].bottom = this->top    + ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM + 1, zoom);
    01261   }
    01262
    01263   Window *w;
    01264   FOR_ALL_WINDOWS_FROM_BACK(w) {
    01265     ViewPort *vp = w->viewport;
    01266     if (vp != NULL && vp->zoom <= maxzoom) {
    01267       assert(vp->width != 0);
    01268       Rect &zl = zoomlevels[vp->zoom];
    01269       MarkViewportDirty(vp, zl.left, zl.top, zl.right, zl.bottom);
    01270     }
    01271   }
    01272 }
    01273
    01274 static void ViewportDrawTileSprites(const TileSpriteToDrawVector *tstdv)
    01275 {
    01276   const TileSpriteToDraw *tsend = tstdv->End();
    01277   for (const TileSpriteToDraw *ts = tstdv->Begin(); ts != tsend; ++ts) {
    01278     DrawSpriteViewport(ts->image, ts->pal, ts->x, ts->y, ts->sub);
    01279   }
    01280 }
    01281
    01283 static void ViewportSortParentSprites(ParentSpriteToSortVector *psdv)
    01284 {
    01285   ParentSpriteToDraw **psdvend = psdv->End();
    01286   ParentSpriteToDraw **psd = psdv->Begin();
    01287   while (psd != psdvend) {
    01288     ParentSpriteToDraw *ps = *psd;
    01289
    01290     if (ps->comparison_done) {
    01291       psd++;
    01292       continue;
    01293     }
    01294
    01295     ps->comparison_done = true;
    01296
    01297     for (ParentSpriteToDraw **psd2 = psd + 1; psd2 != psdvend; psd2++) {
    01298       ParentSpriteToDraw *ps2 = *psd2;
    01299
    01300       if (ps2->comparison_done) continue;
    01301
    01302       /* Decide which comparator to use, based on whether the bounding
    01303        * boxes overlap
    01304        */
    01305       if (ps->xmax >= ps2->xmin && ps->xmin <= ps2->xmax && // overlap in X?
    01306           ps->ymax >= ps2->ymin && ps->ymin <= ps2->ymax && // overlap in Y?
    01307           ps->zmax >= ps2->zmin && ps->zmin <= ps2->zmax) { // overlap in Z?
    01308         /* Use X+Y+Z as the sorting order, so sprites closer to the bottom of
    01309          * the screen and with higher Z elevation, are drawn in front.
    01310          * Here X,Y,Z are the coordinates of the "center of mass" of the sprite,
    01311          * i.e. X=(left+right)/2, etc.
    01312          * However, since we only care about order, don't actually divide / 2
    01313          */
    01314         if (ps->xmin + ps->xmax + ps->ymin + ps->ymax + ps->zmin + ps->zmax <=
    01315             ps2->xmin + ps2->xmax + ps2->ymin + ps2->ymax + ps2->zmin + ps2->zmax) {
    01316           continue;
    01317         }
    01318       } else {
    01319         /* We only change the order, if it is definite.
    01320          * I.e. every single order of X, Y, Z says ps2 is behind ps or they overlap.
    01321          * That is: If one partial order says ps behind ps2, do not change the order.
    01322          */
    01323         if (ps->xmax < ps2->xmin ||
    01324             ps->ymax < ps2->ymin ||
    01325             ps->zmax < ps2->zmin) {
    01326           continue;
    01327         }
    01328       }
    01329
    01330       /* Move ps2 in front of ps */
    01331       ParentSpriteToDraw *temp = ps2;
    01332       for (ParentSpriteToDraw **psd3 = psd2; psd3 > psd; psd3--) {
    01333         *psd3 = *(psd3 - 1);
    01334       }
    01335       *psd = temp;
    01336     }
    01337   }
    01338 }
    01339
    01340 static void ViewportDrawParentSprites(const ParentSpriteToSortVector *psd, const ChildScreenSpriteToDrawVector *csstdv)
    01341 {
    01342   const ParentSpriteToDraw * const *psd_end = psd->End();
    01343   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
    01344     const ParentSpriteToDraw *ps = *it;
    01345     if (ps->image != SPR_EMPTY_BOUNDING_BOX) DrawSpriteViewport(ps->image, ps->pal, ps->x, ps->y, ps->sub);
    01346
    01347     int child_idx = ps->first_child;
    01348     while (child_idx >= 0) {
    01349       const ChildScreenSpriteToDraw *cs = csstdv->Get(child_idx);
    01350       child_idx = cs->next;
    01351       DrawSpriteViewport(cs->image, cs->pal, ps->left + cs->x, ps->top + cs->y, cs->sub);
    01352     }
    01353   }
    01354 }
    01355
    01360 static void ViewportDrawBoundingBoxes(const ParentSpriteToSortVector *psd)
    01361 {
    01362   const ParentSpriteToDraw * const *psd_end = psd->End();
    01363   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
    01364     const ParentSpriteToDraw *ps = *it;
    01365     Point pt1 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmax + 1); // top front corner
    01366     Point pt2 = RemapCoords(ps->xmin    , ps->ymax + 1, ps->zmax + 1); // top left corner
    01367     Point pt3 = RemapCoords(ps->xmax + 1, ps->ymin    , ps->zmax + 1); // top right corner
    01368     Point pt4 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmin    ); // bottom front corner
    01369
    01370     DrawBox(        pt1.x,         pt1.y,
    01371             pt2.x - pt1.x, pt2.y - pt1.y,
    01372             pt3.x - pt1.x, pt3.y - pt1.y,
    01373             pt4.x - pt1.x, pt4.y - pt1.y);
    01374   }
    01375 }
    01376
    01377 static void ViewportDrawStrings(DrawPixelInfo *dpi, const StringSpriteToDrawVector *sstdv)
    01378 {
    01379   DrawPixelInfo dp;
    01380   ZoomLevel zoom;
    01381
    01382   _cur_dpi = &dp;
    01383   dp = *dpi;
    01384
    01385   zoom = dp.zoom;
    01386   dp.zoom = ZOOM_LVL_NORMAL;
    01387
    01388   dp.left   = UnScaleByZoom(dp.left,   zoom);
    01389   dp.top    = UnScaleByZoom(dp.top,    zoom);
    01390   dp.width  = UnScaleByZoom(dp.width,  zoom);
    01391   dp.height = UnScaleByZoom(dp.height, zoom);
    01392
    01393   const StringSpriteToDraw *ssend = sstdv->End();
    01394   for (const StringSpriteToDraw *ss = sstdv->Begin(); ss != ssend; ++ss) {
    01395     TextColour colour = TC_BLACK;
    01396     bool small = HasBit(ss->width, 15);
    01397     int w = GB(ss->width, 0, 15);
    01398     int x = UnScaleByZoom(ss->x, zoom);
    01399     int y = UnScaleByZoom(ss->y, zoom);
    01400     int h = VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM;
    01401
    01402     SetDParam(0, ss->params[0]);
    01403     SetDParam(1, ss->params[1]);
    01404
    01405     if (ss->colour != INVALID_COLOUR) {
    01406       /* Do not draw signs nor station names if they are set invisible */
    01407       if (IsInvisibilitySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) continue;
    01408
    01409       /* if we didn't draw a rectangle, or if transparant building is on,
    01410        * draw the text in the colour the rectangle would have */
    01411       if (IsTransparencySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) {
    01412         /* Real colours need the TC_IS_PALETTE_COLOUR flag
    01413          * otherwise colours from _string_colourmap are assumed. */
    01414         colour = (TextColour)_colour_gradient[ss->colour][6] | TC_IS_PALETTE_COLOUR;
    01415       }
    01416
    01417       /* Draw the rectangle if 'tranparent station signs' is off,
    01418        * or if we are drawing a general text sign (STR_WHITE_SIGN) */
    01419       if (!IsTransparencySet(TO_SIGNS) || ss->string == STR_WHITE_SIGN) {
    01420         DrawFrameRect(
    01421           x, y, x + w, y + h, ss->colour,
    01422           IsTransparencySet(TO_SIGNS) ? FR_TRANSPARENT : FR_NONE
    01423         );
    01424       }
    01425     }
    01426
    01427     DrawString(x + VPSM_LEFT, x + w - 1 - VPSM_RIGHT, y + VPSM_TOP, ss->string, colour, SA_HOR_CENTER);
    01428   }
    01429 }
    01430
    01431 void ViewportDoDraw(const ViewPort *vp, int left, int top, int right, int bottom)
    01432 {
    01433   DrawPixelInfo *old_dpi = _cur_dpi;
    01434   _cur_dpi = &_vd.dpi;
    01435
    01436   _vd.dpi.zoom = vp->zoom;
    01437   int mask = ScaleByZoom(-1, vp->zoom);
    01438
    01439   _vd.combine_sprites = SPRITE_COMBINE_NONE;
    01440
    01441   _vd.dpi.width = (right - left) & mask;
    01442   _vd.dpi.height = (bottom - top) & mask;
    01443   _vd.dpi.left = left & mask;
    01444   _vd.dpi.top = top & mask;
    01445   _vd.dpi.pitch = old_dpi->pitch;
    01446   _vd.last_child = NULL;
    01447
    01448   int x = UnScaleByZoom(_vd.dpi.left - (vp->virtual_left & mask), vp->zoom) + vp->left;
    01449   int y = UnScaleByZoom(_vd.dpi.top - (vp->virtual_top & mask), vp->zoom) + vp->top;
    01450
    01451   _vd.dpi.dst_ptr = BlitterFactoryBase::GetCurrentBlitter()->MoveTo(old_dpi->dst_ptr, x - old_dpi->left, y - old_dpi->top);
    01452
    01453   ViewportAddLandscape();
    01454   ViewportAddVehicles(&_vd.dpi);
    01455
    01456   ViewportAddTownNames(&_vd.dpi);
    01457   ViewportAddStationNames(&_vd.dpi);
    01458   ViewportAddSigns(&_vd.dpi);
    01459
    01460   DrawTextEffects(&_vd.dpi);
    01461
    01462   if (_vd.tile_sprites_to_draw.Length() != 0) ViewportDrawTileSprites(&_vd.tile_sprites_to_draw);
    01463
    01464   ParentSpriteToDraw *psd_end = _vd.parent_sprites_to_draw.End();
    01465   for (ParentSpriteToDraw *it = _vd.parent_sprites_to_draw.Begin(); it != psd_end; it++) {
    01466     *_vd.parent_sprites_to_sort.Append() = it;
    01467   }
    01468
    01469   ViewportSortParentSprites(&_vd.parent_sprites_to_sort);
    01470   ViewportDrawParentSprites(&_vd.parent_sprites_to_sort, &_vd.child_screen_sprites_to_draw);
    01471
    01472   if (_draw_bounding_boxes) ViewportDrawBoundingBoxes(&_vd.parent_sprites_to_sort);
    01473
    01474   if (_vd.string_sprites_to_draw.Length() != 0) ViewportDrawStrings(&_vd.dpi, &_vd.string_sprites_to_draw);
    01475
    01476   _cur_dpi = old_dpi;
    01477
    01478   _vd.string_sprites_to_draw.Clear();
    01479   _vd.tile_sprites_to_draw.Clear();
    01480   _vd.parent_sprites_to_draw.Clear();
    01481   _vd.parent_sprites_to_sort.Clear();
    01482   _vd.child_screen_sprites_to_draw.Clear();
    01483 }
    01484
    01489 static void ViewportDrawChk(const ViewPort *vp, int left, int top, int right, int bottom)
    01490 {
    01491   if (ScaleByZoom(bottom - top, vp->zoom) * ScaleByZoom(right - left, vp->zoom) > 180000 * ZOOM_LVL_BASE * ZOOM_LVL_BASE) {
    01492     if ((bottom - top) > (right - left)) {
    01493       int t = (top + bottom) >> 1;
    01494       ViewportDrawChk(vp, left, top, right, t);
    01495       ViewportDrawChk(vp, left, t, right, bottom);
    01496     } else {
    01497       int t = (left + right) >> 1;
    01498       ViewportDrawChk(vp, left, top, t, bottom);
    01499       ViewportDrawChk(vp, t, top, right, bottom);
    01500     }
    01501   } else {
    01502     ViewportDoDraw(vp,
    01503       ScaleByZoom(left - vp->left, vp->zoom) + vp->virtual_left,
    01504       ScaleByZoom(top - vp->top, vp->zoom) + vp->virtual_top,
    01505       ScaleByZoom(right - vp->left, vp->zoom) + vp->virtual_left,
    01506       ScaleByZoom(bottom - vp->top, vp->zoom) + vp->virtual_top
    01507     );
    01508   }
    01509 }
    01510
    01511 static inline void ViewportDraw(const ViewPort *vp, int left, int top, int right, int bottom)
    01512 {
    01513   if (right <= vp->left || bottom <= vp->top) return;
    01514
    01515   if (left >= vp->left + vp->width) return;
    01516
    01517   if (left < vp->left) left = vp->left;
    01518   if (right > vp->left + vp->width) right = vp->left + vp->width;
    01519
    01520   if (top >= vp->top + vp->height) return;
    01521
    01522   if (top < vp->top) top = vp->top;
    01523   if (bottom > vp->top + vp->height) bottom = vp->top + vp->height;
    01524
    01525   ViewportDrawChk(vp, left, top, right, bottom);
    01526 }
    01527
    01531 void Window::DrawViewport() const
    01532 {
    01533   DrawPixelInfo *dpi = _cur_dpi;
    01534
    01535   dpi->left += this->left;
    01536   dpi->top += this->top;
    01537
    01538   ViewportDraw(this->viewport, dpi->left, dpi->top, dpi->left + dpi->width, dpi->top + dpi->height);
    01539
    01540   dpi->left -= this->left;
    01541   dpi->top -= this->top;
    01542 }
    01543
    01544 static inline void ClampViewportToMap(const ViewPort *vp, int &x, int &y)
    01545 {
    01546   /* Centre of the viewport is hot spot */
    01547   x += vp->virtual_width / 2;
    01548   y += vp->virtual_height / 2;
    01549
    01550   /* Convert viewport coordinates to map coordinates
    01551    * Calculation is scaled by 4 to avoid rounding errors */
    01552   int vx = -x + y * 2;
    01553   int vy =  x + y * 2;
    01554
    01555   /* clamp to size of map */
    01556   vx = Clamp(vx, 0, MapMaxX() * TILE_SIZE * 4 * ZOOM_LVL_BASE);
    01557   vy = Clamp(vy, 0, MapMaxY() * TILE_SIZE * 4 * ZOOM_LVL_BASE);
    01558
    01559   /* Convert map coordinates to viewport coordinates */
    01560   x = (-vx + vy) / 2;
    01561   y = ( vx + vy) / 4;
    01562
    01563   /* Remove centering */
    01564   x -= vp->virtual_width / 2;
    01565   y -= vp->virtual_height / 2;
    01566 }
    01567
    01572 void UpdateViewportPosition(Window *w)
    01573 {
    01574   const ViewPort *vp = w->viewport;
    01575
    01576   if (w->viewport->follow_vehicle != INVALID_VEHICLE) {
    01577     const Vehicle *veh = Vehicle::Get(w->viewport->follow_vehicle);
    01578     Point pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
    01579
    01580     w->viewport->scrollpos_x = pt.x;
    01581     w->viewport->scrollpos_y = pt.y;
    01582     SetViewportPosition(w, pt.x, pt.y);
    01583   } else {
    01584     /* Ensure the destination location is within the map */
    01585     ClampViewportToMap(vp, w->viewport->dest_scrollpos_x, w->viewport->dest_scrollpos_y);
    01586
    01587     int delta_x = w->viewport->dest_scrollpos_x - w->viewport->scrollpos_x;
    01588     int delta_y = w->viewport->dest_scrollpos_y - w->viewport->scrollpos_y;
    01589
    01590     if (delta_x != 0 || delta_y != 0) {
    01591       if (_settings_client.gui.smooth_scroll) {
    01592         int max_scroll = ScaleByMapSize1D(512 * ZOOM_LVL_BASE);
    01593         /* Not at our desired position yet... */
    01594         w->viewport->scrollpos_x += Clamp(delta_x / 4, -max_scroll, max_scroll);
    01595         w->viewport->scrollpos_y += Clamp(delta_y / 4, -max_scroll, max_scroll);
    01596       } else {
    01597         w->viewport->scrollpos_x = w->viewport->dest_scrollpos_x;
    01598         w->viewport->scrollpos_y = w->viewport->dest_scrollpos_y;
    01599       }
    01600     }
    01601
    01602     ClampViewportToMap(vp, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
    01603
    01604     SetViewportPosition(w, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
    01605   }
    01606 }
    01607
    01617 static void MarkViewportDirty(const ViewPort *vp, int left, int top, int right, int bottom)
    01618 {
    01619   right -= vp->virtual_left;
    01620   if (right <= 0) return;
    01621
    01622   bottom -= vp->virtual_top;
    01623   if (bottom <= 0) return;
    01624
    01625   left = max(0, left - vp->virtual_left);
    01626
    01627   if (left >= vp->virtual_width) return;
    01628
    01629   top = max(0, top - vp->virtual_top);
    01630
    01631   if (top >= vp->virtual_height) return;
    01632
    01633   SetDirtyBlocks(
    01634     UnScaleByZoomLower(left, vp->zoom) + vp->left,
    01635     UnScaleByZoomLower(top, vp->zoom) + vp->top,
    01636     UnScaleByZoom(right, vp->zoom) + vp->left + 1,
    01637     UnScaleByZoom(bottom, vp->zoom) + vp->top + 1
    01638   );
    01639 }
    01640
    01649 void MarkAllViewportsDirty(int left, int top, int right, int bottom)
    01650 {
    01651   Window *w;
    01652   FOR_ALL_WINDOWS_FROM_BACK(w) {
    01653     ViewPort *vp = w->viewport;
    01654     if (vp != NULL) {
    01655       assert(vp->width != 0);
    01656       MarkViewportDirty(vp, left, top, right, bottom);
    01657     }
    01658   }
    01659 }
    01660
    01661 void ConstrainAllViewportsZoom()
    01662 {
    01663   Window *w;
    01664   FOR_ALL_WINDOWS_FROM_FRONT(w) {
    01665     if (w->viewport == NULL) continue;
    01666
    01667     ZoomLevel zoom = static_cast<ZoomLevel>(Clamp(w->viewport->zoom, _settings_client.gui.zoom_min, _settings_client.gui.zoom_max));
    01668     if (zoom != w->viewport->zoom) {
    01669       while (w->viewport->zoom < zoom) DoZoomInOutWindow(ZOOM_OUT, w);
    01670       while (w->viewport->zoom > zoom) DoZoomInOutWindow(ZOOM_IN, w);
    01671     }
    01672   }
    01673 }
    01674
    01680 void MarkTileDirtyByTile(TileIndex tile)
    01681 {
    01682   Point pt = RemapCoords(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, GetTilePixelZ(tile));
    01683   MarkAllViewportsDirty(
    01684     pt.x - 31  * ZOOM_LVL_BASE,
    01685     pt.y - 122 * ZOOM_LVL_BASE,
    01686     pt.x - 31  * ZOOM_LVL_BASE + 67  * ZOOM_LVL_BASE,
    01687     pt.y - 122 * ZOOM_LVL_BASE + 154 * ZOOM_LVL_BASE
    01688   );
    01689 }
    01690
    01698 static void SetSelectionTilesDirty()
    01699 {
    01700   int x_size = _thd.size.x;
    01701   int y_size = _thd.size.y;
    01702
    01703   if (!_thd.diagonal) { // Selecting in a straigth rectangle (or a single square)
    01704     int x_start = _thd.pos.x;
    01705     int y_start = _thd.pos.y;
    01706
    01707     if (_thd.outersize.x != 0) {
    01708       x_size  += _thd.outersize.x;
    01709       x_start += _thd.offs.x;
    01710       y_size  += _thd.outersize.y;
    01711       y_start += _thd.offs.y;
    01712     }
    01713
    01714     x_size -= TILE_SIZE;
    01715     y_size -= TILE_SIZE;
    01716
    01717     assert(x_size >= 0);
    01718     assert(y_size >= 0);
    01719
    01720     int x_end = Clamp(x_start + x_size, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
    01721     int y_end = Clamp(y_start + y_size, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
    01722
    01723     x_start = Clamp(x_start, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
    01724     y_start = Clamp(y_start, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
    01725
    01726     /* make sure everything is multiple of TILE_SIZE */
    01727     assert((x_end | y_end | x_start | y_start) % TILE_SIZE == 0);
    01728
    01729     /* How it works:
    01730      * Suppose we have to mark dirty rectangle of 3x4 tiles:
    01731      *   x
    01732      *  xxx
    01733      * xxxxx
    01734      *  xxxxx
    01735      *   xxx
    01736      *    x
    01737      * This algorithm marks dirty columns of tiles, so it is done in 3+4-1 steps:
    01738      * 1)  x     2)  x
    01739      *    xxx       Oxx
    01740      *   Oxxxx     xOxxx
    01741      *    xxxxx     Oxxxx
    01742      *     xxx       xxx
    01743      *      x         x
    01744      * And so forth...
    01745      */
    01746
    01747     int top_x = x_end; // coordinates of top dirty tile
    01748     int top_y = y_start;
    01749     int bot_x = top_x; // coordinates of bottom dirty tile
    01750     int bot_y = top_y;
    01751
    01752     do {
    01753       /* topmost dirty point */
    01754       TileIndex top_tile = TileVirtXY(top_x, top_y);
    01755       Point top = RemapCoords(top_x, top_y, GetTileMaxPixelZ(top_tile));
    01756
    01757       /* bottommost point */
    01758       TileIndex bottom_tile = TileVirtXY(bot_x, bot_y);
    01759       Point bot = RemapCoords(bot_x + TILE_SIZE, bot_y + TILE_SIZE, GetTilePixelZ(bottom_tile)); // bottommost point
    01760
    01761       /* the 'x' coordinate of 'top' and 'bot' is the same (and always in the same distance from tile middle),
    01762        * tile height/slope affects only the 'y' on-screen coordinate! */
    01763
    01764       int l = top.x - (TILE_PIXELS - 2) * ZOOM_LVL_BASE; // 'x' coordinate of left side of dirty rectangle
    01765       int t = top.y;                     // 'y' coordinate of top side -//-
    01766       int r = top.x + (TILE_PIXELS - 2) * ZOOM_LVL_BASE; // right side of dirty rectangle
    01767       int b = bot.y;                     // bottom -//-
    01768
    01769       static const int OVERLAY_WIDTH = 4 * ZOOM_LVL_BASE; // part of selection sprites is drawn outside the selected area
    01770
    01771       /* For halftile foundations on SLOPE_STEEP_S the sprite extents some more towards the top */
    01772       MarkAllViewportsDirty(l - OVERLAY_WIDTH, t - OVERLAY_WIDTH - TILE_HEIGHT * ZOOM_LVL_BASE, r + OVERLAY_WIDTH, b + OVERLAY_WIDTH * ZOOM_LVL_BASE);
    01773
    01774       /* haven't we reached the topmost tile yet? */
    01775       if (top_x != x_start) {
    01776         top_x -= TILE_SIZE;
    01777       } else {
    01778         top_y += TILE_SIZE;
    01779       }
    01780
    01781       /* the way the bottom tile changes is different when we reach the bottommost tile */
    01782       if (bot_y != y_end) {
    01783         bot_y += TILE_SIZE;
    01784       } else {
    01785         bot_x -= TILE_SIZE;
    01786       }
    01787     } while (bot_x >= top_x);
    01788   } else { // Selecting in a 45 degrees rotated (diagonal) rectangle.
    01789     /* a_size, b_size describe a rectangle with rotated coordinates */
    01790     int a_size = x_size + y_size, b_size = x_size - y_size;
    01791
    01792     int interval_a = a_size < 0 ? -(int)TILE_SIZE : (int)TILE_SIZE;
    01793     int interval_b = b_size < 0 ? -(int)TILE_SIZE : (int)TILE_SIZE;
    01794
    01795     for (int a = -interval_a; a != a_size + interval_a; a += interval_a) {
    01796       for (int b = -interval_b; b != b_size + interval_b; b += interval_b) {
    01797         uint x = (_thd.pos.x + (a + b) / 2) / TILE_SIZE;
    01798         uint y = (_thd.pos.y + (a - b) / 2) / TILE_SIZE;
    01799
    01800         if (x < MapMaxX() && y < MapMaxY()) {
    01801           MarkTileDirtyByTile(TileXY(x, y));
    01802         }
    01803       }
    01804     }
    01805   }
    01806 }
    01807
    01808
    01809 void SetSelectionRed(bool b)
    01810 {
    01811   _thd.make_square_red = b;
    01812   SetSelectionTilesDirty();
    01813 }
    01814
    01823 static bool CheckClickOnViewportSign(const ViewPort *vp, int x, int y, const ViewportSign *sign)
    01824 {
    01825   bool small = (vp->zoom >= ZOOM_LVL_OUT_16X);
    01826   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, vp->zoom);
    01827   int sign_height = ScaleByZoom(VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM, vp->zoom);
    01828
    01829   x = ScaleByZoom(x - vp->left, vp->zoom) + vp->virtual_left;
    01830   y = ScaleByZoom(y - vp->top, vp->zoom) + vp->virtual_top;
    01831
    01832   return y >= sign->top && y < sign->top + sign_height &&
    01833       x >= sign->center - sign_half_width && x < sign->center + sign_half_width;
    01834 }
    01835
    01836 static bool CheckClickOnTown(const ViewPort *vp, int x, int y)
    01837 {
    01838   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES)) return false;
    01839
    01840   const Town *t;
    01841   FOR_ALL_TOWNS(t) {
    01842     if (CheckClickOnViewportSign(vp, x, y, &t->cache.sign)) {
    01843       ShowTownViewWindow(t->index);
    01844       return true;
    01845     }
    01846   }
    01847
    01848   return false;
    01849 }
    01850
    01851 static bool CheckClickOnStation(const ViewPort *vp, int x, int y)
    01852 {
    01853   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || IsInvisibilitySet(TO_SIGNS)) return false;
    01854
    01855   const BaseStation *st;
    01856   FOR_ALL_BASE_STATIONS(st) {
    01857     /* Check whether the base station is a station or a waypoint */
    01858     bool is_station = Station::IsExpected(st);
    01859
    01860     /* Don't check if the display options are disabled */
    01861     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
    01862
    01863     /* Don't check if competitor signs are not shown and the sign isn't owned by the local company */
    01864     if (!HasBit(_display_opt, DO_SHOW_COMPETITOR_SIGNS) && _local_company != st->owner && st->owner != OWNER_NONE) continue;
    01865
    01866     if (CheckClickOnViewportSign(vp, x, y, &st->sign)) {
    01867       if (is_station) {
    01868         ShowStationViewWindow(st->index);
    01869       } else {
    01870         ShowWaypointWindow(Waypoint::From(st));
    01871       }
    01872       return true;
    01873     }
    01874   }
    01875
    01876   return false;
    01877 }
    01878
    01879
    01880 static bool CheckClickOnSign(const ViewPort *vp, int x, int y)
    01881 {
    01882   /* Signs are turned off, or they are transparent and invisibility is ON, or company is a spectator */
    01883   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS) || _local_company == COMPANY_SPECTATOR) return false;
    01884
    01885   const Sign *si;
    01886   FOR_ALL_SIGNS(si) {
    01887     /* If competitor signs are hidden, don't check signs that aren't owned by local company */
    01888     if (!HasBit(_display_opt, DO_SHOW_COMPETITOR_SIGNS) && _local_company != si->owner && si->owner != OWNER_DEITY) continue;
    01889     if (si->owner == OWNER_DEITY && _game_mode != GM_EDITOR) continue;
    01890
    01891     if (CheckClickOnViewportSign(vp, x, y, &si->sign)) {
    01892       HandleClickOnSign(si);
    01893       return true;
    01894     }
    01895   }
    01896
    01897   return false;
    01898 }
    01899
    01900
    01901 static bool CheckClickOnLandscape(const ViewPort *vp, int x, int y)
    01902 {
    01903   Point pt = TranslateXYToTileCoord(vp, x, y);
    01904
    01905   if (pt.x != -1) return ClickTile(TileVirtXY(pt.x, pt.y));
    01906   return true;
    01907 }
    01908
    01909 static void PlaceObject()
    01910 {
    01911   Point pt;
    01912   Window *w;
    01913
    01914   pt = GetTileBelowCursor();
    01915   if (pt.x == -1) return;
    01916
    01917   if ((_thd.place_mode & HT_DRAG_MASK) == HT_POINT) {
    01918     pt.x += TILE_SIZE / 2;
    01919     pt.y += TILE_SIZE / 2;
    01920   }
    01921
    01922   _tile_fract_coords.x = pt.x & TILE_UNIT_MASK;
    01923   _tile_fract_coords.y = pt.y & TILE_UNIT_MASK;
    01924
    01925   w = _thd.GetCallbackWnd();
    01926   if (w != NULL) w->OnPlaceObject(pt, TileVirtXY(pt.x, pt.y));
    01927 }
    01928
    01929
    01930 bool HandleViewportClicked(const ViewPort *vp, int x, int y)
    01931 {
    01932   const Vehicle *v = CheckClickOnVehicle(vp, x, y);
    01933
    01934   if (_thd.place_mode & HT_VEHICLE) {
    01935     if (v != NULL && VehicleClicked(v)) return true;
    01936   }
    01937
    01938   /* Vehicle placement mode already handled above. */
    01939   if ((_thd.place_mode & HT_DRAG_MASK) != HT_NONE) {
    01940     PlaceObject();
    01941     return true;
    01942   }
    01943
    01944   if (CheckClickOnTown(vp, x, y)) return true;
    01945   if (CheckClickOnStation(vp, x, y)) return true;
    01946   if (CheckClickOnSign(vp, x, y)) return true;
    01947   bool result = CheckClickOnLandscape(vp, x, y);
    01948
    01949   if (v != NULL) {
    01950     DEBUG(misc, 2, "Vehicle %d (index %d) at %p", v->unitnumber, v->index, v);
    01951     if (IsCompanyBuildableVehicleType(v)) {
    01952       v = v->First();
    01953       if (_ctrl_pressed && v->owner == _local_company) {
    01954         StartStopVehicle(v, true);
    01955       } else {
    01956         ShowVehicleViewWindow(v);
    01957       }
    01958     }
    01959     return true;
    01960   }
    01961   return result;
    01962 }
    01963
    01964
    01974 bool ScrollWindowTo(int x, int y, int z, Window *w, bool instant)
    01975 {
    01976   /* The slope cannot be acquired outside of the map, so make sure we are always within the map. */
    01977   if (z == -1) z = GetSlopePixelZ(Clamp(x, 0, MapSizeX() * TILE_SIZE - 1), Clamp(y, 0, MapSizeY() * TILE_SIZE - 1));
    01978
    01979   Point pt = MapXYZToViewport(w->viewport, x, y, z);
    01980   w->viewport->follow_vehicle = INVALID_VEHICLE;
    01981
    01982   if (w->viewport->dest_scrollpos_x == pt.x && w->viewport->dest_scrollpos_y == pt.y) return false;
    01983
    01984   if (instant) {
    01985     w->viewport->scrollpos_x = pt.x;
    01986     w->viewport->scrollpos_y = pt.y;
    01987   }
    01988
    01989   w->viewport->dest_scrollpos_x = pt.x;
    01990   w->viewport->dest_scrollpos_y = pt.y;
    01991   return true;
    01992 }
    01993
    02001 bool ScrollWindowToTile(TileIndex tile, Window *w, bool instant)
    02002 {
    02003   return ScrollWindowTo(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, -1, w, instant);
    02004 }
    02005
    02012 bool ScrollMainWindowToTile(TileIndex tile, bool instant)
    02013 {
    02014   return ScrollMainWindowTo(TileX(tile) * TILE_SIZE + TILE_SIZE / 2, TileY(tile) * TILE_SIZE + TILE_SIZE / 2, -1, instant);
    02015 }
    02016
    02021 void SetRedErrorSquare(TileIndex tile)
    02022 {
    02023   TileIndex old;
    02024
    02025   old = _thd.redsq;
    02026   _thd.redsq = tile;
    02027
    02028   if (tile != old) {
    02029     if (tile != INVALID_TILE) MarkTileDirtyByTile(tile);
    02030     if (old  != INVALID_TILE) MarkTileDirtyByTile(old);
    02031   }
    02032 }
    02033
    02039 void SetTileSelectSize(int w, int h)
    02040 {
    02041   _thd.new_size.x = w * TILE_SIZE;
    02042   _thd.new_size.y = h * TILE_SIZE;
    02043   _thd.new_outersize.x = 0;
    02044   _thd.new_outersize.y = 0;
    02045 }
    02046
    02047 void SetTileSelectBigSize(int ox, int oy, int sx, int sy)
    02048 {
    02049   _thd.offs.x = ox * TILE_SIZE;
    02050   _thd.offs.y = oy * TILE_SIZE;
    02051   _thd.new_outersize.x = sx * TILE_SIZE;
    02052   _thd.new_outersize.y = sy * TILE_SIZE;
    02053 }
    02054
    02056 static HighLightStyle GetAutorailHT(int x, int y)
    02057 {
    02058   return HT_RAIL | _autorail_piece[x & TILE_UNIT_MASK][y & TILE_UNIT_MASK];
    02059 }
    02060
    02064 void TileHighlightData::Reset()
    02065 {
    02066   this->pos.x = 0;
    02067   this->pos.y = 0;
    02068   this->new_pos.x = 0;
    02069   this->new_pos.y = 0;
    02070 }
    02071
    02076 bool TileHighlightData::IsDraggingDiagonal()
    02077 {
    02078   return (this->place_mode & HT_DIAGONAL) != 0 && _ctrl_pressed && _left_button_down;
    02079 }
    02080
    02085 Window *TileHighlightData::GetCallbackWnd()
    02086 {
    02087   return FindWindowById(this->window_class, this->window_number);
    02088 }
    02089
    02090
    02091
    02099 void UpdateTileSelection()
    02100 {
    02101   int x1;
    02102   int y1;
    02103
    02104   HighLightStyle new_drawstyle = HT_NONE;
    02105   bool new_diagonal = false;
    02106
    02107   if ((_thd.place_mode & HT_DRAG_MASK) == HT_SPECIAL) {
    02108     x1 = _thd.selend.x;
    02109     y1 = _thd.selend.y;
    02110     if (x1 != -1) {
    02111       int x2 = _thd.selstart.x & ~TILE_UNIT_MASK;
    02112       int y2 = _thd.selstart.y & ~TILE_UNIT_MASK;
    02113       x1 &= ~TILE_UNIT_MASK;
    02114       y1 &= ~TILE_UNIT_MASK;
    02115
    02116       if (_thd.IsDraggingDiagonal()) {
    02117         new_diagonal = true;
    02118       } else {
    02119         if (x1 >= x2) Swap(x1, x2);
    02120         if (y1 >= y2) Swap(y1, y2);
    02121       }
    02122       _thd.new_pos.x = x1;
    02123       _thd.new_pos.y = y1;
    02124       _thd.new_size.x = x2 - x1;
    02125       _thd.new_size.y = y2 - y1;
    02126       if (!new_diagonal) {
    02127         _thd.new_size.x += TILE_SIZE;
    02128         _thd.new_size.y += TILE_SIZE;
    02129       }
    02130       new_drawstyle = _thd.next_drawstyle;
    02131     }
    02132   } else if ((_thd.place_mode & HT_DRAG_MASK) != HT_NONE) {
    02133     Point pt = GetTileBelowCursor();
    02134     x1 = pt.x;
    02135     y1 = pt.y;
    02136     if (x1 != -1) {
    02137       switch (_thd.place_mode & HT_DRAG_MASK) {
    02138         case HT_RECT:
    02139           new_drawstyle = HT_RECT;
    02140           break;
    02141         case HT_POINT:
    02142           new_drawstyle = HT_POINT;
    02143           x1 += TILE_SIZE / 2;
    02144           y1 += TILE_SIZE / 2;
    02145           break;
    02146         case HT_RAIL:
    02147           /* Draw one highlighted tile in any direction */
    02148           new_drawstyle = GetAutorailHT(pt.x, pt.y);
    02149           break;
    02150         case HT_LINE:
    02151           switch (_thd.place_mode & HT_DIR_MASK) {
    02152             case HT_DIR_X: new_drawstyle = HT_LINE | HT_DIR_X; break;
    02153             case HT_DIR_Y: new_drawstyle = HT_LINE | HT_DIR_Y; break;
    02154
    02155             case HT_DIR_HU:
    02156             case HT_DIR_HL:
    02157               new_drawstyle = (pt.x & TILE_UNIT_MASK) + (pt.y & TILE_UNIT_MASK) <= TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
    02158               break;
    02159
    02160             case HT_DIR_VL:
    02161             case HT_DIR_VR:
    02162               new_drawstyle = (pt.x & TILE_UNIT_MASK) > (pt.y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02163               break;
    02164
    02165             default: NOT_REACHED();
    02166           }
    02167           _thd.selstart.x = x1 & ~TILE_UNIT_MASK;
    02168           _thd.selstart.y = y1 & ~TILE_UNIT_MASK;
    02169           break;
    02170         default:
    02171           NOT_REACHED();
    02172           break;
    02173       }
    02174       _thd.new_pos.x = x1 & ~TILE_UNIT_MASK;
    02175       _thd.new_pos.y = y1 & ~TILE_UNIT_MASK;
    02176     }
    02177   }
    02178
    02179   /* redraw selection */
    02180   if (_thd.drawstyle != new_drawstyle ||
    02181       _thd.pos.x != _thd.new_pos.x || _thd.pos.y != _thd.new_pos.y ||
    02182       _thd.size.x != _thd.new_size.x || _thd.size.y != _thd.new_size.y ||
    02183       _thd.outersize.x != _thd.new_outersize.x ||
    02184       _thd.outersize.y != _thd.new_outersize.y ||
    02185       _thd.diagonal    != new_diagonal) {
    02186     /* Clear the old tile selection? */
    02187     if ((_thd.drawstyle & HT_DRAG_MASK) != HT_NONE) SetSelectionTilesDirty();
    02188
    02189     _thd.drawstyle = new_drawstyle;
    02190     _thd.pos = _thd.new_pos;
    02191     _thd.size = _thd.new_size;
    02192     _thd.outersize = _thd.new_outersize;
    02193     _thd.diagonal = new_diagonal;
    02194     _thd.dirty = 0xff;
    02195
    02196     /* Draw the new tile selection? */
    02197     if ((new_drawstyle & HT_DRAG_MASK) != HT_NONE) SetSelectionTilesDirty();
    02198   }
    02199 }
    02200
    02208 static inline void ShowMeasurementTooltips(StringID str, uint paramcount, const uint64 params[], TooltipCloseCondition close_cond = TCC_LEFT_CLICK)
    02209 {
    02210   if (!_settings_client.gui.measure_tooltip) return;
    02211   GuiShowTooltips(_thd.GetCallbackWnd(), str, paramcount, params, close_cond);
    02212 }
    02213
    02215 void VpStartPlaceSizing(TileIndex tile, ViewportPlaceMethod method, ViewportDragDropSelectionProcess process)
    02216 {
    02217   _thd.select_method = method;
    02218   _thd.select_proc   = process;
    02219   _thd.selend.x = TileX(tile) * TILE_SIZE;
    02220   _thd.selstart.x = TileX(tile) * TILE_SIZE;
    02221   _thd.selend.y = TileY(tile) * TILE_SIZE;
    02222   _thd.selstart.y = TileY(tile) * TILE_SIZE;
    02223
    02224   /* Needed so several things (road, autoroad, bridges, ...) are placed correctly.
    02225    * In effect, placement starts from the centre of a tile
    02226    */
    02227   if (method == VPM_X_OR_Y || method == VPM_FIX_X || method == VPM_FIX_Y) {
    02228     _thd.selend.x += TILE_SIZE / 2;
    02229     _thd.selend.y += TILE_SIZE / 2;
    02230     _thd.selstart.x += TILE_SIZE / 2;
    02231     _thd.selstart.y += TILE_SIZE / 2;
    02232   }
    02233
    02234   HighLightStyle others = _thd.place_mode & ~(HT_DRAG_MASK | HT_DIR_MASK);
    02235   if ((_thd.place_mode & HT_DRAG_MASK) == HT_RECT) {
    02236     _thd.place_mode = HT_SPECIAL | others;
    02237     _thd.next_drawstyle = HT_RECT | others;
    02238   } else if (_thd.place_mode & (HT_RAIL | HT_LINE)) {
    02239     _thd.place_mode = HT_SPECIAL | others;
    02240     _thd.next_drawstyle = _thd.drawstyle | others;
    02241   } else {
    02242     _thd.place_mode = HT_SPECIAL | others;
    02243     _thd.next_drawstyle = HT_POINT | others;
    02244   }
    02245   _special_mouse_mode = WSM_SIZING;
    02246 }
    02247
    02248 void VpSetPlaceSizingLimit(int limit)
    02249 {
    02250   _thd.sizelimit = limit;
    02251 }
    02252
    02258 void VpSetPresizeRange(TileIndex from, TileIndex to)
    02259 {
    02260   uint64 distance = DistanceManhattan(from, to) + 1;
    02261
    02262   _thd.selend.x = TileX(to) * TILE_SIZE;
    02263   _thd.selend.y = TileY(to) * TILE_SIZE;
    02264   _thd.selstart.x = TileX(from) * TILE_SIZE;
    02265   _thd.selstart.y = TileY(from) * TILE_SIZE;
    02266   _thd.next_drawstyle = HT_RECT;
    02267
    02268   /* show measurement only if there is any length to speak of */
    02269   if (distance > 1) ShowMeasurementTooltips(STR_MEASURE_LENGTH, 1, &distance, TCC_HOVER);
    02270 }
    02271
    02272 static void VpStartPreSizing()
    02273 {
    02274   _thd.selend.x = -1;
    02275   _special_mouse_mode = WSM_PRESIZE;
    02276 }
    02277
    02282 static HighLightStyle Check2x1AutoRail(int mode)
    02283 {
    02284   int fxpy = _tile_fract_coords.x + _tile_fract_coords.y;
    02285   int sxpy = (_thd.selend.x & TILE_UNIT_MASK) + (_thd.selend.y & TILE_UNIT_MASK);
    02286   int fxmy = _tile_fract_coords.x - _tile_fract_coords.y;
    02287   int sxmy = (_thd.selend.x & TILE_UNIT_MASK) - (_thd.selend.y & TILE_UNIT_MASK);
    02288
    02289   switch (mode) {
    02290     default: NOT_REACHED();
    02291     case 0: // end piece is lower right
    02292       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
    02293       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
    02294       return HT_DIR_Y;
    02295
    02296     case 1:
    02297       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
    02298       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
    02299       return HT_DIR_Y;
    02300
    02301     case 2:
    02302       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
    02303       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
    02304       return HT_DIR_X;
    02305
    02306     case 3:
    02307       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
    02308       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
    02309       return HT_DIR_X;
    02310   }
    02311 }
    02312
    02326 static bool SwapDirection(HighLightStyle style, TileIndex start_tile, TileIndex end_tile)
    02327 {
    02328   uint start_x = TileX(start_tile);
    02329   uint start_y = TileY(start_tile);
    02330   uint end_x = TileX(end_tile);
    02331   uint end_y = TileY(end_tile);
    02332
    02333   switch (style & HT_DRAG_MASK) {
    02334     case HT_RAIL:
    02335     case HT_LINE: return (end_x > start_x || (end_x == start_x && end_y > start_y));
    02336
    02337     case HT_RECT:
    02338     case HT_POINT: return (end_x != start_x && end_y < start_y);
    02339     default: NOT_REACHED();
    02340   }
    02341
    02342   return false;
    02343 }
    02344
    02360 static int CalcHeightdiff(HighLightStyle style, uint distance, TileIndex start_tile, TileIndex end_tile)
    02361 {
    02362   bool swap = SwapDirection(style, start_tile, end_tile);
    02363   uint h0, h1; // Start height and end height.
    02364
    02365   if (start_tile == end_tile) return 0;
    02366   if (swap) Swap(start_tile, end_tile);
    02367
    02368   switch (style & HT_DRAG_MASK) {
    02369     case HT_RECT: {
    02370       static const TileIndexDiffC heightdiff_area_by_dir[] = {
    02371         /* Start */ {1, 0}, /* Dragging east */ {0, 0}, // Dragging south
    02372         /* End   */ {0, 1}, /* Dragging east */ {1, 1}  // Dragging south
    02373       };
    02374
    02375       /* In the case of an area we can determine whether we were dragging south or
    02376        * east by checking the X-coordinates of the tiles */
    02377       byte style_t = (byte)(TileX(end_tile) > TileX(start_tile));
    02378       start_tile = TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_area_by_dir[style_t]));
    02379       end_tile   = TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_area_by_dir[2 + style_t]));
    02380       /* FALL THROUGH */
    02381     }
    02382
    02383     case HT_POINT:
    02384       h0 = TileHeight(start_tile);
    02385       h1 = TileHeight(end_tile);
    02386       break;
    02387     default: { // All other types, this is mostly only line/autorail
    02388       static const HighLightStyle flip_style_direction[] = {
    02389         HT_DIR_X, HT_DIR_Y, HT_DIR_HL, HT_DIR_HU, HT_DIR_VR, HT_DIR_VL
    02390       };
    02391       static const TileIndexDiffC heightdiff_line_by_dir[] = {
    02392         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_X  */ {0, 1}, {1, 1}, // HT_DIR_Y
    02393         /* Start */ {1, 0}, {0, 0}, /* HT_DIR_HU */ {1, 0}, {1, 1}, // HT_DIR_HL
    02394         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_VL */ {0, 1}, {1, 1}, // HT_DIR_VR
    02395
    02396         /* Start */ {0, 1}, {0, 0}, /* HT_DIR_X  */ {1, 0}, {0, 0}, // HT_DIR_Y
    02397         /* End   */ {0, 1}, {0, 0}, /* HT_DIR_HU */ {1, 1}, {0, 1}, // HT_DIR_HL
    02398         /* End   */ {1, 0}, {0, 0}, /* HT_DIR_VL */ {0, 0}, {0, 1}, // HT_DIR_VR
    02399       };
    02400
    02401       distance %= 2; // we're only interested if the distance is even or uneven
    02402       style &= HT_DIR_MASK;
    02403
    02404       /* To handle autorail, we do some magic to be able to use a lookup table.
    02405        * Firstly if we drag the other way around, we switch start&end, and if needed
    02406        * also flip the drag-position. Eg if it was on the left, and the distance is even
    02407        * that means the end, which is now the start is on the right */
    02408       if (swap && distance == 0) style = flip_style_direction[style];
    02409
    02410       /* Use lookup table for start-tile based on HighLightStyle direction */
    02411       byte style_t = style * 2;
    02412       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
    02413       h0 = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t])));
    02414       uint ht = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t + 1])));
    02415       h0 = max(h0, ht);
    02416
    02417       /* Use lookup table for end-tile based on HighLightStyle direction
    02418        * flip around side (lower/upper, left/right) based on distance */
    02419       if (distance == 0) style_t = flip_style_direction[style] * 2;
    02420       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
    02421       h1 = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t])));
    02422       ht = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t + 1])));
    02423       h1 = max(h1, ht);
    02424       break;
    02425     }
    02426   }
    02427
    02428   if (swap) Swap(h0, h1);
    02429   return (int)(h1 - h0) * TILE_HEIGHT_STEP;
    02430 }
    02431
    02432 static const StringID measure_strings_length[] = {STR_NULL, STR_MEASURE_LENGTH, STR_MEASURE_LENGTH_HEIGHTDIFF};
    02433
    02440 static void CheckUnderflow(int &test, int &other, int mult)
    02441 {
    02442   if (test >= 0) return;
    02443
    02444   other += mult * test;
    02445   test = 0;
    02446 }
    02447
    02455 static void CheckOverflow(int &test, int &other, int max, int mult)
    02456 {
    02457   if (test <= max) return;
    02458
    02459   other += mult * (test - max);
    02460   test = max;
    02461 }
    02462
    02464 static void CalcRaildirsDrawstyle(int x, int y, int method)
    02465 {
    02466   HighLightStyle b;
    02467
    02468   int dx = _thd.selstart.x - (_thd.selend.x & ~TILE_UNIT_MASK);
    02469   int dy = _thd.selstart.y - (_thd.selend.y & ~TILE_UNIT_MASK);
    02470   uint w = abs(dx) + TILE_SIZE;
    02471   uint h = abs(dy) + TILE_SIZE;
    02472
    02473   if (method & ~(VPM_RAILDIRS | VPM_SIGNALDIRS)) {
    02474     /* We 'force' a selection direction; first four rail buttons. */
    02475     method &= ~(VPM_RAILDIRS | VPM_SIGNALDIRS);
    02476     int raw_dx = _thd.selstart.x - _thd.selend.x;
    02477     int raw_dy = _thd.selstart.y - _thd.selend.y;
    02478     switch (method) {
    02479       case VPM_FIX_X:
    02480         b = HT_LINE | HT_DIR_Y;
    02481         x = _thd.selstart.x;
    02482         break;
    02483
    02484       case VPM_FIX_Y:
    02485         b = HT_LINE | HT_DIR_X;
    02486         y = _thd.selstart.y;
    02487         break;
    02488
    02489       case VPM_FIX_HORIZONTAL:
    02490         if (dx == -dy) {
    02491           /* We are on a straight horizontal line. Determine the 'rail'
    02492            * to build based the sub tile location. */
    02493           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
    02494         } else {
    02495           /* We are not on a straight line. Determine the rail to build
    02496            * based on whether we are above or below it. */
    02497           b = dx + dy >= (int)TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
    02498
    02499           /* Calculate where a horizontal line through the start point and
    02500            * a vertical line from the selected end point intersect and
    02501            * use that point as the end point. */
    02502           int offset = (raw_dx - raw_dy) / 2;
    02503           x = _thd.selstart.x - (offset & ~TILE_UNIT_MASK);
    02504           y = _thd.selstart.y + (offset & ~TILE_UNIT_MASK);
    02505
    02506           /* 'Build' the last half rail tile if needed */
    02507           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
    02508             if (dx + dy >= (int)TILE_SIZE) {
    02509               x += (dx + dy < 0) ? (int)TILE_SIZE : -(int)TILE_SIZE;
    02510             } else {
    02511               y += (dx + dy < 0) ? (int)TILE_SIZE : -(int)TILE_SIZE;
    02512             }
    02513           }
    02514
    02515           /* Make sure we do not overflow the map! */
    02516           CheckUnderflow(x, y, 1);
    02517           CheckUnderflow(y, x, 1);
    02518           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, 1);
    02519           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, 1);
    02520           assert(x >= 0 && y >= 0 && x <= (int)(MapMaxX() * TILE_SIZE) && y <= (int)(MapMaxY() * TILE_SIZE));
    02521         }
    02522         break;
    02523
    02524       case VPM_FIX_VERTICAL:
    02525         if (dx == dy) {
    02526           /* We are on a straight vertical line. Determine the 'rail'
    02527            * to build based the sub tile location. */
    02528           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02529         } else {
    02530           /* We are not on a straight line. Determine the rail to build
    02531            * based on whether we are left or right from it. */
    02532           b = dx < dy ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02533
    02534           /* Calculate where a vertical line through the start point and
    02535            * a horizontal line from the selected end point intersect and
    02536            * use that point as the end point. */
    02537           int offset = (raw_dx + raw_dy + (int)TILE_SIZE) / 2;
    02538           x = _thd.selstart.x - (offset & ~TILE_UNIT_MASK);
    02539           y = _thd.selstart.y - (offset & ~TILE_UNIT_MASK);
    02540
    02541           /* 'Build' the last half rail tile if needed */
    02542           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
    02543             if (dx - dy < 0) {
    02544               y += (dx > dy) ? (int)TILE_SIZE : -(int)TILE_SIZE;
    02545             } else {
    02546               x += (dx < dy) ? (int)TILE_SIZE : -(int)TILE_SIZE;
    02547             }
    02548           }
    02549
    02550           /* Make sure we do not overflow the map! */
    02551           CheckUnderflow(x, y, -1);
    02552           CheckUnderflow(y, x, -1);
    02553           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, -1);
    02554           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, -1);
    02555           assert(x >= 0 && y >= 0 && x <= (int)(MapMaxX() * TILE_SIZE) && y <= (int)(MapMaxY() * TILE_SIZE));
    02556         }
    02557         break;
    02558
    02559       default:
    02560         NOT_REACHED();
    02561     }
    02562   } else if (TileVirtXY(_thd.selstart.x, _thd.selstart.y) == TileVirtXY(x, y)) { // check if we're only within one tile
    02563     if (method & VPM_RAILDIRS) {
    02564       b = GetAutorailHT(x, y);
    02565     } else { // rect for autosignals on one tile
    02566       b = HT_RECT;
    02567     }
    02568   } else if (h == TILE_SIZE) { // Is this in X direction?
    02569     if (dx == (int)TILE_SIZE) { // 2x1 special handling
    02570       b = (Check2x1AutoRail(3)) | HT_LINE;
    02571     } else if (dx == -(int)TILE_SIZE) {
    02572       b = (Check2x1AutoRail(2)) | HT_LINE;
    02573     } else {
    02574       b = HT_LINE | HT_DIR_X;
    02575     }
    02576     y = _thd.selstart.y;
    02577   } else if (w == TILE_SIZE) { // Or Y direction?
    02578     if (dy == (int)TILE_SIZE) { // 2x1 special handling
    02579       b = (Check2x1AutoRail(1)) | HT_LINE;
    02580     } else if (dy == -(int)TILE_SIZE) { // 2x1 other direction
    02581       b = (Check2x1AutoRail(0)) | HT_LINE;
    02582     } else {
    02583       b = HT_LINE | HT_DIR_Y;
    02584     }
    02585     x = _thd.selstart.x;
    02586   } else if (w > h * 2) { // still count as x dir?
    02587     b = HT_LINE | HT_DIR_X;
    02588     y = _thd.selstart.y;
    02589   } else if (h > w * 2) { // still count as y dir?
    02590     b = HT_LINE | HT_DIR_Y;
    02591     x = _thd.selstart.x;
    02592   } else { // complicated direction
    02593     int d = w - h;
    02594     _thd.selend.x = _thd.selend.x & ~TILE_UNIT_MASK;
    02595     _thd.selend.y = _thd.selend.y & ~TILE_UNIT_MASK;
    02596
    02597     /* four cases. */
    02598     if (x > _thd.selstart.x) {
    02599       if (y > _thd.selstart.y) {
    02600         /* south */
    02601         if (d == 0) {
    02602           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02603         } else if (d >= 0) {
    02604           x = _thd.selstart.x + h;
    02605           b = HT_LINE | HT_DIR_VL;
    02606         } else {
    02607           y = _thd.selstart.y + w;
    02608           b = HT_LINE | HT_DIR_VR;
    02609         }
    02610       } else {
    02611         /* west */
    02612         if (d == 0) {
    02613           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
    02614         } else if (d >= 0) {
    02615           x = _thd.selstart.x + h;
    02616           b = HT_LINE | HT_DIR_HL;
    02617         } else {
    02618           y = _thd.selstart.y - w;
    02619           b = HT_LINE | HT_DIR_HU;
    02620         }
    02621       }
    02622     } else {
    02623       if (y > _thd.selstart.y) {
    02624         /* east */
    02625         if (d == 0) {
    02626           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
    02627         } else if (d >= 0) {
    02628           x = _thd.selstart.x - h;
    02629           b = HT_LINE | HT_DIR_HU;
    02630         } else {
    02631           y = _thd.selstart.y + w;
    02632           b = HT_LINE | HT_DIR_HL;
    02633         }
    02634       } else {
    02635         /* north */
    02636         if (d == 0) {
    02637           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02638         } else if (d >= 0) {
    02639           x = _thd.selstart.x - h;
    02640           b = HT_LINE | HT_DIR_VR;
    02641         } else {
    02642           y = _thd.selstart.y - w;
    02643           b = HT_LINE | HT_DIR_VL;
    02644         }
    02645       }
    02646     }
    02647   }
    02648
    02649   if (_settings_client.gui.measure_tooltip) {
    02650     TileIndex t0 = TileVirtXY(_thd.selstart.x, _thd.selstart.y);
    02651     TileIndex t1 = TileVirtXY(x, y);
    02652     uint distance = DistanceManhattan(t0, t1) + 1;
    02653     byte index = 0;
    02654     uint64 params[2];
    02655
    02656     if (distance != 1) {
    02657       int heightdiff = CalcHeightdiff(b, distance, t0, t1);
    02658       /* If we are showing a tooltip for horizontal or vertical drags,
    02659        * 2 tiles have a length of 1. To bias towards the ceiling we add
    02660        * one before division. It feels more natural to count 3 lengths as 2 */
    02661       if ((b & HT_DIR_MASK) != HT_DIR_X && (b & HT_DIR_MASK) != HT_DIR_Y) {
    02662         distance = CeilDiv(distance, 2);
    02663       }
    02664
    02665       params[index++] = distance;
    02666       if (heightdiff != 0) params[index++] = heightdiff;
    02667     }
    02668
    02669     ShowMeasurementTooltips(measure_strings_length[index], index, params);
    02670   }
    02671
    02672   _thd.selend.x = x;
    02673   _thd.selend.y = y;
    02674   _thd.next_drawstyle = b;
    02675 }
    02676
    02684 void VpSelectTilesWithMethod(int x, int y, ViewportPlaceMethod method)
    02685 {
    02686   int sx, sy;
    02687   HighLightStyle style;
    02688
    02689   if (x == -1) {
    02690     _thd.selend.x = -1;
    02691     return;
    02692   }
    02693
    02694   /* Special handling of drag in any (8-way) direction */
    02695   if (method & (VPM_RAILDIRS | VPM_SIGNALDIRS)) {
    02696     _thd.selend.x = x;
    02697     _thd.selend.y = y;
    02698     CalcRaildirsDrawstyle(x, y, method);
    02699     return;
    02700   }
    02701
    02702   /* Needed so level-land is placed correctly */
    02703   if ((_thd.next_drawstyle & HT_DRAG_MASK) == HT_POINT) {
    02704     x += TILE_SIZE / 2;
    02705     y += TILE_SIZE / 2;
    02706   }
    02707
    02708   sx = _thd.selstart.x;
    02709   sy = _thd.selstart.y;
    02710
    02711   int limit = 0;
    02712
    02713   switch (method) {
    02714     case VPM_X_OR_Y: // drag in X or Y direction
    02715       if (abs(sy - y) < abs(sx - x)) {
    02716         y = sy;
    02717         style = HT_DIR_X;
    02718       } else {
    02719         x = sx;
    02720         style = HT_DIR_Y;
    02721       }
    02722       goto calc_heightdiff_single_direction;
    02723
    02724     case VPM_X_LIMITED: // Drag in X direction (limited size).
    02725       limit = (_thd.sizelimit - 1) * TILE_SIZE;
    02726       /* FALL THROUGH */
    02727
    02728     case VPM_FIX_X: // drag in Y direction
    02729       x = sx;
    02730       style = HT_DIR_Y;
    02731       goto calc_heightdiff_single_direction;
    02732
    02733     case VPM_Y_LIMITED: // Drag in Y direction (limited size).
    02734       limit = (_thd.sizelimit - 1) * TILE_SIZE;
    02735       /* FALL THROUGH */
    02736
    02737     case VPM_FIX_Y: // drag in X direction
    02738       y = sy;
    02739       style = HT_DIR_X;
    02740
    02741 calc_heightdiff_single_direction:;
    02742       if (limit > 0) {
    02743         x = sx + Clamp(x - sx, -limit, limit);
    02744         y = sy + Clamp(y - sy, -limit, limit);
    02745       }
    02746       if (_settings_client.gui.measure_tooltip) {
    02747         TileIndex t0 = TileVirtXY(sx, sy);
    02748         TileIndex t1 = TileVirtXY(x, y);
    02749         uint distance = DistanceManhattan(t0, t1) + 1;
    02750         byte index = 0;
    02751         uint64 params[2];
    02752
    02753         if (distance != 1) {
    02754           /* With current code passing a HT_LINE style to calculate the height
    02755            * difference is enough. However if/when a point-tool is created
    02756            * with this method, function should be called with new_style (below)
    02757            * instead of HT_LINE | style case HT_POINT is handled specially
    02758            * new_style := (_thd.next_drawstyle & HT_RECT) ? HT_LINE | style : _thd.next_drawstyle; */
    02759           int heightdiff = CalcHeightdiff(HT_LINE | style, 0, t0, t1);
    02760
    02761           params[index++] = distance;
    02762           if (heightdiff != 0) params[index++] = heightdiff;
    02763         }
    02764
    02765         ShowMeasurementTooltips(measure_strings_length[index], index, params);
    02766       }
    02767       break;
    02768
    02769     case VPM_X_AND_Y_LIMITED: // Drag an X by Y constrained rect area.
    02770       limit = (_thd.sizelimit - 1) * TILE_SIZE;
    02771       x = sx + Clamp(x - sx, -limit, limit);
    02772       y = sy + Clamp(y - sy, -limit, limit);
    02773       /* FALL THROUGH */
    02774
    02775     case VPM_X_AND_Y: // drag an X by Y area
    02776       if (_settings_client.gui.measure_tooltip) {
    02777         static const StringID measure_strings_area[] = {
    02778           STR_NULL, STR_NULL, STR_MEASURE_AREA, STR_MEASURE_AREA_HEIGHTDIFF
    02779         };
    02780
    02781         TileIndex t0 = TileVirtXY(sx, sy);
    02782         TileIndex t1 = TileVirtXY(x, y);
    02783         uint dx = Delta(TileX(t0), TileX(t1)) + 1;
    02784         uint dy = Delta(TileY(t0), TileY(t1)) + 1;
    02785         byte index = 0;
    02786         uint64 params[3];
    02787
    02788         /* If dragging an area (eg dynamite tool) and it is actually a single
    02789          * row/column, change the type to 'line' to get proper calculation for height */
    02790         style = (HighLightStyle)_thd.next_drawstyle;
    02791         if (_thd.IsDraggingDiagonal()) {
    02792           /* Determine the "area" of the diagonal dragged selection.
    02793            * We assume the area is the number of tiles along the X
    02794            * edge and the number of tiles along the Y edge. However,
    02795            * multiplying these two numbers does not give the exact
    02796            * number of tiles; basically we are counting the black
    02797            * squares on a chess board and ignore the white ones to
    02798            * make the tile counts at the edges match up. There is no
    02799            * other way to make a proper count though.
    02800            *
    02801            * First convert to the rotated coordinate system. */
    02802           int dist_x = TileX(t0) - TileX(t1);
    02803           int dist_y = TileY(t0) - TileY(t1);
    02804           int a_max = dist_x + dist_y;
    02805           int b_max = dist_y - dist_x;
    02806
    02807           /* Now determine the size along the edge, but due to the
    02808            * chess board principle this counts double. */
    02809           a_max = abs(a_max + (a_max > 0 ? 2 : -2)) / 2;
    02810           b_max = abs(b_max + (b_max > 0 ? 2 : -2)) / 2;
    02811
    02812           /* We get a 1x1 on normal 2x1 rectangles, due to it being
    02813            * a seen as two sides. As the result for actual building
    02814            * will be the same as non-diagonal dragging revert to that
    02815            * behaviour to give it a more normally looking size. */
    02816           if (a_max != 1 || b_max != 1) {
    02817             dx = a_max;
    02818             dy = b_max;
    02819           }
    02820         } else if (style & HT_RECT) {
    02821           if (dx == 1) {
    02822             style = HT_LINE | HT_DIR_Y;
    02823           } else if (dy == 1) {
    02824             style = HT_LINE | HT_DIR_X;
    02825           }
    02826         }
    02827
    02828         if (dx != 1 || dy != 1) {
    02829           int heightdiff = CalcHeightdiff(style, 0, t0, t1);
    02830
    02831           params[index++] = dx - (style & HT_POINT ? 1 : 0);
    02832           params[index++] = dy - (style & HT_POINT ? 1 : 0);
    02833           if (heightdiff != 0) params[index++] = heightdiff;
    02834         }
    02835
    02836         ShowMeasurementTooltips(measure_strings_area[index], index, params);
    02837       }
    02838       break;
    02839
    02840     default: NOT_REACHED();
    02841   }
    02842
    02843   _thd.selend.x = x;
    02844   _thd.selend.y = y;
    02845 }
    02846
    02851 EventState VpHandlePlaceSizingDrag()
    02852 {
    02853   if (_special_mouse_mode != WSM_SIZING) return ES_NOT_HANDLED;
    02854
    02855   /* stop drag mode if the window has been closed */
    02856   Window *w = _thd.GetCallbackWnd();
    02857   if (w == NULL) {
    02858     ResetObjectToPlace();
    02859     return ES_HANDLED;
    02860   }
    02861
    02862   /* while dragging execute the drag procedure of the corresponding window (mostly VpSelectTilesWithMethod() ) */
    02863   if (_left_button_down) {
    02864     w->OnPlaceDrag(_thd.select_method, _thd.select_proc, GetTileBelowCursor());
    02865     return ES_HANDLED;
    02866   }
    02867
    02868   /* mouse button released..
    02869    * keep the selected tool, but reset it to the original mode. */
    02870   _special_mouse_mode = WSM_NONE;
    02871   HighLightStyle others = _thd.place_mode & ~(HT_DRAG_MASK | HT_DIR_MASK);
    02872   if ((_thd.next_drawstyle & HT_DRAG_MASK) == HT_RECT) {
    02873     _thd.place_mode = HT_RECT | others;
    02874   } else if (_thd.select_method & VPM_SIGNALDIRS) {
    02875     _thd.place_mode = HT_RECT | others;
    02876   } else if (_thd.select_method & VPM_RAILDIRS) {
    02877     _thd.place_mode = (_thd.select_method & ~VPM_RAILDIRS) ? _thd.next_drawstyle : (HT_RAIL | others);
    02878   } else {
    02879     _thd.place_mode = HT_POINT | others;
    02880   }
    02881   SetTileSelectSize(1, 1);
    02882
    02883   w->OnPlaceMouseUp(_thd.select_method, _thd.select_proc, _thd.selend, TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y));
    02884
    02885   return ES_HANDLED;
    02886 }
    02887
    02888 void SetObjectToPlaceWnd(CursorID icon, PaletteID pal, HighLightStyle mode, Window *w)
    02889 {
    02890   SetObjectToPlace(icon, pal, mode, w->window_class, w->window_number);
    02891 }
    02892
    02893 #include "table/animcursors.h"
    02894
    02895 void SetObjectToPlace(CursorID icon, PaletteID pal, HighLightStyle mode, WindowClass window_class, WindowNumber window_num)
    02896 {
    02897   if (_thd.window_class != WC_INVALID) {
    02898     /* Undo clicking on button and drag & drop */
    02899     Window *w = _thd.GetCallbackWnd();
    02900     /* Call the abort function, but set the window class to something
    02901      * that will never be used to avoid infinite loops. Setting it to
    02902      * the 'next' window class must not be done because recursion into
    02903      * this function might in some cases reset the newly set object to
    02904      * place or not properly reset the original selection. */
    02905     _thd.window_class = WC_INVALID;
    02906     if (w != NULL) w->OnPlaceObjectAbort();
    02907   }
    02908
    02909   /* Mark the old selection dirty, in case the selection shape or colour changes */
    02910   if ((_thd.drawstyle & HT_DRAG_MASK) != HT_NONE) SetSelectionTilesDirty();
    02911
    02912   SetTileSelectSize(1, 1);
    02913
    02914   _thd.make_square_red = false;
    02915
    02916   if (mode == HT_DRAG) { // HT_DRAG is for dragdropping trains in the depot window
    02917     mode = HT_NONE;
    02918     _special_mouse_mode = WSM_DRAGDROP;
    02919   } else {
    02920     _special_mouse_mode = WSM_NONE;
    02921   }
    02922
    02923   _thd.place_mode = mode;
    02924   _thd.window_class = window_class;
    02925   _thd.window_number = window_num;
    02926
    02927   if ((mode & HT_DRAG_MASK) == HT_SPECIAL) { // special tools, like tunnels or docks start with presizing mode
    02928     VpStartPreSizing();
    02929   }
    02930
    02931   if ((icon & ANIMCURSOR_FLAG) != 0) {
    02932     SetAnimatedMouseCursor(_animcursors[icon & ~ANIMCURSOR_FLAG]);
    02933   } else {
    02934     SetMouseCursor(icon, pal);
    02935   }
    02936
    02937 }
    02938
    02939 void ResetObjectToPlace()
    02940 {
    02941   SetObjectToPlace(SPR_CURSOR_MOUSE, PAL_NONE, HT_NONE, WC_MAIN_WINDOW, 0);
    02942 }