# viewport.cpp

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    00001 /* $Id: viewport.cpp 18702 2010-01-03 20:55:00Z frosch $ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
    00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
    00008  */
    00009
    00028 #include "stdafx.h"
    00029 #include "openttd.h"
    00030 #include "landscape.h"
    00031 #include "viewport_func.h"
    00032 #include "station_base.h"
    00033 #include "waypoint_base.h"
    00034 #include "town.h"
    00035 #include "signs_base.h"
    00036 #include "signs_func.h"
    00037 #include "variables.h"
    00038 #include "vehicle_base.h"
    00039 #include "vehicle_gui.h"
    00040 #include "blitter/factory.hpp"
    00041 #include "transparency.h"
    00042 #include "strings_func.h"
    00043 #include "zoom_func.h"
    00044 #include "vehicle_func.h"
    00045 #include "company_func.h"
    00046 #include "waypoint_func.h"
    00047 #include "window_func.h"
    00048 #include "tilehighlight_func.h"
    00049 #include "window_gui.h"
    00050
    00051 #include "table/sprites.h"
    00052 #include "table/strings.h"
    00053
    00054 PlaceProc *_place_proc;
    00055 Point _tile_fract_coords;
    00056
    00057 struct StringSpriteToDraw {
    00058   StringID string;
    00059   Colours colour;
    00060   int32 x;
    00061   int32 y;
    00062   uint64 params[2];
    00063   uint16 width;
    00064 };
    00065
    00066 struct TileSpriteToDraw {
    00067   SpriteID image;
    00068   SpriteID pal;
    00069   const SubSprite *sub;
    00070   int32 x;
    00071   int32 y;
    00072 };
    00073
    00074 struct ChildScreenSpriteToDraw {
    00075   SpriteID image;
    00076   SpriteID pal;
    00077   const SubSprite *sub;
    00078   int32 x;
    00079   int32 y;
    00080   int next;
    00081 };
    00082
    00084 struct ParentSpriteToDraw {
    00085   SpriteID image;
    00086   SpriteID pal;
    00087   const SubSprite *sub;
    00088
    00089   int32 x;
    00090   int32 y;
    00091
    00092   int32 left;
    00093   int32 top;
    00094
    00095   int32 xmin;
    00096   int32 xmax;
    00097   int32 ymin;
    00098   int32 ymax;
    00099   int zmin;
    00100   int zmax;
    00101
    00102   int first_child;
    00103   bool comparison_done;
    00104 };
    00105
    00107 enum FoundationPart {
    00108   FOUNDATION_PART_NONE     = 0xFF,
    00109   FOUNDATION_PART_NORMAL   = 0,
    00110   FOUNDATION_PART_HALFTILE = 1,
    00111   FOUNDATION_PART_END
    00112 };
    00113
    00117 enum SpriteCombineMode {
    00118   SPRITE_COMBINE_NONE,
    00119   SPRITE_COMBINE_PENDING,
    00120   SPRITE_COMBINE_ACTIVE,
    00121 };
    00122
    00123 typedef SmallVector<TileSpriteToDraw, 64> TileSpriteToDrawVector;
    00124 typedef SmallVector<StringSpriteToDraw, 4> StringSpriteToDrawVector;
    00125 typedef SmallVector<ParentSpriteToDraw, 64> ParentSpriteToDrawVector;
    00126 typedef SmallVector<ParentSpriteToDraw*, 64> ParentSpriteToSortVector;
    00127 typedef SmallVector<ChildScreenSpriteToDraw, 16> ChildScreenSpriteToDrawVector;
    00128
    00130 struct ViewportDrawer {
    00131   DrawPixelInfo dpi;
    00132
    00133   StringSpriteToDrawVector string_sprites_to_draw;
    00134   TileSpriteToDrawVector tile_sprites_to_draw;
    00135   ParentSpriteToDrawVector parent_sprites_to_draw;
    00136   ParentSpriteToSortVector parent_sprites_to_sort;
    00137   ChildScreenSpriteToDrawVector child_screen_sprites_to_draw;
    00138
    00139   int *last_child;
    00140
    00141   SpriteCombineMode combine_sprites;
    00142
    00143   int foundation[FOUNDATION_PART_END];
    00144   FoundationPart foundation_part;
    00145   int *last_foundation_child[FOUNDATION_PART_END];
    00146   Point foundation_offset[FOUNDATION_PART_END];
    00147 };
    00148
    00149 static ViewportDrawer _vd;
    00150
    00151 TileHighlightData _thd;
    00152 static TileInfo *_cur_ti;
    00153 bool _draw_bounding_boxes = false;
    00154
    00155 static Point MapXYZToViewport(const ViewPort *vp, int x, int y, int z)
    00156 {
    00157   Point p = RemapCoords(x, y, z);
    00158   p.x -= vp->virtual_width / 2;
    00159   p.y -= vp->virtual_height / 2;
    00160   return p;
    00161 }
    00162
    00163 void DeleteWindowViewport(Window *w)
    00164 {
    00165   free(w->viewport);
    00166   w->viewport = NULL;
    00167 }
    00168
    00181 void InitializeWindowViewport(Window *w, int x, int y,
    00182   int width, int height, uint32 follow_flags, ZoomLevel zoom)
    00183 {
    00184   assert(w->viewport == NULL);
    00185
    00186   ViewportData *vp = CallocT<ViewportData>(1);
    00187
    00188   vp->left = x + w->left;
    00189   vp->top = y + w->top;
    00190   vp->width = width;
    00191   vp->height = height;
    00192
    00193   vp->zoom = zoom;
    00194
    00195   vp->virtual_width = ScaleByZoom(width, zoom);
    00196   vp->virtual_height = ScaleByZoom(height, zoom);
    00197
    00198   Point pt;
    00199
    00200   if (follow_flags & 0x80000000) {
    00201     const Vehicle *veh;
    00202
    00203     vp->follow_vehicle = (VehicleID)(follow_flags & 0xFFFF);
    00204     veh = Vehicle::Get(vp->follow_vehicle);
    00205     pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
    00206   } else {
    00207     uint x = TileX(follow_flags) * TILE_SIZE;
    00208     uint y = TileY(follow_flags) * TILE_SIZE;
    00209
    00210     vp->follow_vehicle = INVALID_VEHICLE;
    00211     pt = MapXYZToViewport(vp, x, y, GetSlopeZ(x, y));
    00212   }
    00213
    00214   vp->scrollpos_x = pt.x;
    00215   vp->scrollpos_y = pt.y;
    00216   vp->dest_scrollpos_x = pt.x;
    00217   vp->dest_scrollpos_y = pt.y;
    00218
    00219   w->viewport = vp;
    00220   vp->virtual_left = 0;//pt.x;
    00221   vp->virtual_top = 0;//pt.y;
    00222 }
    00223
    00224 static Point _vp_move_offs;
    00225
    00226 static void DoSetViewportPosition(const Window *w, int left, int top, int width, int height)
    00227 {
    00228   FOR_ALL_WINDOWS_FROM_BACK_FROM(w, w) {
    00229     if (left + width > w->left &&
    00230         w->left + w->width > left &&
    00231         top + height > w->top &&
    00232         w->top + w->height > top) {
    00233
    00234       if (left < w->left) {
    00235         DoSetViewportPosition(w, left, top, w->left - left, height);
    00236         DoSetViewportPosition(w, left + (w->left - left), top, width - (w->left - left), height);
    00237         return;
    00238       }
    00239
    00240       if (left + width > w->left + w->width) {
    00241         DoSetViewportPosition(w, left, top, (w->left + w->width - left), height);
    00242         DoSetViewportPosition(w, left + (w->left + w->width - left), top, width - (w->left + w->width - left), height);
    00243         return;
    00244       }
    00245
    00246       if (top < w->top) {
    00247         DoSetViewportPosition(w, left, top, width, (w->top - top));
    00248         DoSetViewportPosition(w, left, top + (w->top - top), width, height - (w->top - top));
    00249         return;
    00250       }
    00251
    00252       if (top + height > w->top + w->height) {
    00253         DoSetViewportPosition(w, left, top, width, (w->top + w->height - top));
    00254         DoSetViewportPosition(w, left, top + (w->top + w->height - top), width, height - (w->top + w->height - top));
    00255         return;
    00256       }
    00257
    00258       return;
    00259     }
    00260   }
    00261
    00262   {
    00263     int xo = _vp_move_offs.x;
    00264     int yo = _vp_move_offs.y;
    00265
    00266     if (abs(xo) >= width || abs(yo) >= height) {
    00267       /* fully_outside */
    00268       RedrawScreenRect(left, top, left + width, top + height);
    00269       return;
    00270     }
    00271
    00272     GfxScroll(left, top, width, height, xo, yo);
    00273
    00274     if (xo > 0) {
    00275       RedrawScreenRect(left, top, xo + left, top + height);
    00276       left += xo;
    00277       width -= xo;
    00278     } else if (xo < 0) {
    00279       RedrawScreenRect(left + width + xo, top, left + width, top + height);
    00280       width += xo;
    00281     }
    00282
    00283     if (yo > 0) {
    00284       RedrawScreenRect(left, top, width + left, top + yo);
    00285     } else if (yo < 0) {
    00286       RedrawScreenRect(left, top + height + yo, width + left, top + height);
    00287     }
    00288   }
    00289 }
    00290
    00291 static void SetViewportPosition(Window *w, int x, int y)
    00292 {
    00293   ViewPort *vp = w->viewport;
    00294   int old_left = vp->virtual_left;
    00295   int old_top = vp->virtual_top;
    00296   int i;
    00297   int left, top, width, height;
    00298
    00299   vp->virtual_left = x;
    00300   vp->virtual_top = y;
    00301
    00302   /* viewport is bound to its left top corner, so it must be rounded down (UnScaleByZoomLower)
    00303    * else glitch described in FS#1412 will happen (offset by 1 pixel with zoom level > NORMAL)
    00304    */
    00305   old_left = UnScaleByZoomLower(old_left, vp->zoom);
    00306   old_top = UnScaleByZoomLower(old_top, vp->zoom);
    00307   x = UnScaleByZoomLower(x, vp->zoom);
    00308   y = UnScaleByZoomLower(y, vp->zoom);
    00309
    00310   old_left -= x;
    00311   old_top -= y;
    00312
    00313   if (old_top == 0 && old_left == 0) return;
    00314
    00315   _vp_move_offs.x = old_left;
    00316   _vp_move_offs.y = old_top;
    00317
    00318   left = vp->left;
    00319   top = vp->top;
    00320   width = vp->width;
    00321   height = vp->height;
    00322
    00323   if (left < 0) {
    00324     width += left;
    00325     left = 0;
    00326   }
    00327
    00328   i = left + width - _screen.width;
    00329   if (i >= 0) width -= i;
    00330
    00331   if (width > 0) {
    00332     if (top < 0) {
    00333       height += top;
    00334       top = 0;
    00335     }
    00336
    00337     i = top + height - _screen.height;
    00338     if (i >= 0) height -= i;
    00339
    00340     if (height > 0) DoSetViewportPosition(w->z_front, left, top, width, height);
    00341   }
    00342 }
    00343
    00352 ViewPort *IsPtInWindowViewport(const Window *w, int x, int y)
    00353 {
    00354   ViewPort *vp = w->viewport;
    00355
    00356   if (vp != NULL &&
    00357       IsInsideMM(x, vp->left, vp->left + vp->width) &&
    00358       IsInsideMM(y, vp->top, vp->top + vp->height))
    00359     return vp;
    00360
    00361   return NULL;
    00362 }
    00363
    00370 static Point TranslateXYToTileCoord(const ViewPort *vp, int x, int y)
    00371 {
    00372   Point pt;
    00373   int a, b;
    00374   uint z;
    00375
    00376   if ( (uint)(x -= vp->left) >= (uint)vp->width ||
    00377         (uint)(y -= vp->top) >= (uint)vp->height) {
    00378         Point pt = {-1, -1};
    00379         return pt;
    00380   }
    00381
    00382   x = (ScaleByZoom(x, vp->zoom) + vp->virtual_left) >> 2;
    00383   y = (ScaleByZoom(y, vp->zoom) + vp->virtual_top) >> 1;
    00384
    00385   a = y - x;
    00386   b = y + x;
    00387
    00388   /* we need to move variables in to the valid range, as the
    00389    * GetTileZoomCenterWindow() function can call here with invalid x and/or y,
    00390    * when the user tries to zoom out along the sides of the map */
    00391   a = Clamp(a, -4 * TILE_SIZE, (int)(MapMaxX() * TILE_SIZE) - 1);
    00392   b = Clamp(b, -4 * TILE_SIZE, (int)(MapMaxY() * TILE_SIZE) - 1);
    00393
    00394   /* (a, b) is the X/Y-world coordinate that belongs to (x,y) if the landscape would be completely flat on height 0.
    00395    * Now find the Z-world coordinate by fix point iteration.
    00396    * This is a bit tricky because the tile height is non-continuous at foundations.
    00397    * The clicked point should be approached from the back, otherwise there are regions that are not clickable.
    00398    * (FOUNDATION_HALFTILE_LOWER on SLOPE_STEEP_S hides north halftile completely)
    00399    * So give it a z-malus of 4 in the first iterations.
    00400    */
    00401   z = 0;
    00402
    00403   int min_coord = _settings_game.construction.freeform_edges ? TILE_SIZE : 0;
    00404
    00405   for (int i = 0; i < 5; i++) z = GetSlopeZ(Clamp(a + (int)max(z, 4u) - 4, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + (int)max(z, 4u) - 4, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
    00406   for (uint malus = 3; malus > 0; malus--) z = GetSlopeZ(Clamp(a + (int)max(z, malus) - (int)malus, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + (int)max(z, malus) - (int)malus, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
    00407   for (int i = 0; i < 5; i++) z = GetSlopeZ(Clamp(a + (int)z, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + (int)z, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
    00408
    00409   pt.x = Clamp(a + (int)z, min_coord, MapMaxX() * TILE_SIZE - 1);
    00410   pt.y = Clamp(b + (int)z, min_coord, MapMaxY() * TILE_SIZE - 1);
    00411
    00412   return pt;
    00413 }
    00414
    00415 /* When used for zooming, check area below current coordinates (x,y)
    00416  * and return the tile of the zoomed out/in position (zoom_x, zoom_y)
    00417  * when you just want the tile, make x = zoom_x and y = zoom_y */
    00418 static Point GetTileFromScreenXY(int x, int y, int zoom_x, int zoom_y)
    00419 {
    00420   Window *w;
    00421   ViewPort *vp;
    00422   Point pt;
    00423
    00424   if ( (w = FindWindowFromPt(x, y)) != NULL &&
    00425        (vp = IsPtInWindowViewport(w, x, y)) != NULL)
    00426         return TranslateXYToTileCoord(vp, zoom_x, zoom_y);
    00427
    00428   pt.y = pt.x = -1;
    00429   return pt;
    00430 }
    00431
    00432 Point GetTileBelowCursor()
    00433 {
    00434   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, _cursor.pos.x, _cursor.pos.y);
    00435 }
    00436
    00437
    00438 Point GetTileZoomCenterWindow(bool in, Window * w)
    00439 {
    00440   int x, y;
    00441   ViewPort *vp = w->viewport;
    00442
    00443   if (in) {
    00444     x = ((_cursor.pos.x - vp->left) >> 1) + (vp->width >> 2);
    00445     y = ((_cursor.pos.y - vp->top) >> 1) + (vp->height >> 2);
    00446   } else {
    00447     x = vp->width - (_cursor.pos.x - vp->left);
    00448     y = vp->height - (_cursor.pos.y - vp->top);
    00449   }
    00450   /* Get the tile below the cursor and center on the zoomed-out center */
    00451   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, x + vp->left, y + vp->top);
    00452 }
    00453
    00460 void HandleZoomMessage(Window *w, const ViewPort *vp, byte widget_zoom_in, byte widget_zoom_out)
    00461 {
    00462   w->SetWidgetDisabledState(widget_zoom_in, vp->zoom == ZOOM_LVL_MIN);
    00463   w->SetWidgetDirty(widget_zoom_in);
    00464
    00465   w->SetWidgetDisabledState(widget_zoom_out, vp->zoom == ZOOM_LVL_MAX);
    00466   w->SetWidgetDirty(widget_zoom_out);
    00467 }
    00468
    00481 static void AddTileSpriteToDraw(SpriteID image, SpriteID pal, int32 x, int32 y, int z, const SubSprite *sub = NULL, int extra_offs_x = 0, int extra_offs_y = 0)
    00482 {
    00483   assert((image & SPRITE_MASK) < MAX_SPRITES);
    00484
    00485   TileSpriteToDraw *ts = _vd.tile_sprites_to_draw.Append();
    00486   ts->image = image;
    00487   ts->pal = pal;
    00488   ts->sub = sub;
    00489   Point pt = RemapCoords(x, y, z);
    00490   ts->x = pt.x + extra_offs_x;
    00491   ts->y = pt.y + extra_offs_y;
    00492 }
    00493
    00506 static void AddChildSpriteToFoundation(SpriteID image, SpriteID pal, const SubSprite *sub, FoundationPart foundation_part, int extra_offs_x, int extra_offs_y)
    00507 {
    00508   assert(IsInsideMM(foundation_part, 0, FOUNDATION_PART_END));
    00509   assert(_vd.foundation[foundation_part] != -1);
    00510   Point offs = _vd.foundation_offset[foundation_part];
    00511
    00512   /* Change the active ChildSprite list to the one of the foundation */
    00513   int *old_child = _vd.last_child;
    00514   _vd.last_child = _vd.last_foundation_child[foundation_part];
    00515
    00516   AddChildSpriteScreen(image, pal, offs.x + extra_offs_x, offs.y + extra_offs_y, false, sub);
    00517
    00518   /* Switch back to last ChildSprite list */
    00519   _vd.last_child = old_child;
    00520 }
    00521
    00535 void DrawGroundSpriteAt(SpriteID image, SpriteID pal, int32 x, int32 y, int z, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
    00536 {
    00537   /* Switch to first foundation part, if no foundation was drawn */
    00538   if (_vd.foundation_part == FOUNDATION_PART_NONE) _vd.foundation_part = FOUNDATION_PART_NORMAL;
    00539
    00540   if (_vd.foundation[_vd.foundation_part] != -1) {
    00541     Point pt = RemapCoords(x, y, z);
    00542     AddChildSpriteToFoundation(image, pal, sub, _vd.foundation_part, pt.x + extra_offs_x, pt.y + extra_offs_y);
    00543   } else {
    00544     AddTileSpriteToDraw(image, pal, _cur_ti->x + x, _cur_ti->y + y, _cur_ti->z + z, sub, extra_offs_x, extra_offs_y);
    00545   }
    00546 }
    00547
    00558 void DrawGroundSprite(SpriteID image, SpriteID pal, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
    00559 {
    00560   DrawGroundSpriteAt(image, pal, 0, 0, 0, sub, extra_offs_x, extra_offs_y);
    00561 }
    00562
    00570 void OffsetGroundSprite(int x, int y)
    00571 {
    00572   /* Switch to next foundation part */
    00573   switch (_vd.foundation_part) {
    00574     case FOUNDATION_PART_NONE:
    00575       _vd.foundation_part = FOUNDATION_PART_NORMAL;
    00576       break;
    00577     case FOUNDATION_PART_NORMAL:
    00578       _vd.foundation_part = FOUNDATION_PART_HALFTILE;
    00579       break;
    00580     default: NOT_REACHED();
    00581   }
    00582
    00583   /* _vd.last_child == NULL if foundation sprite was clipped by the viewport bounds */
    00584   if (_vd.last_child != NULL) _vd.foundation[_vd.foundation_part] = _vd.parent_sprites_to_draw.Length() - 1;
    00585
    00586   _vd.foundation_offset[_vd.foundation_part].x = x;
    00587   _vd.foundation_offset[_vd.foundation_part].y = y;
    00588   _vd.last_foundation_child[_vd.foundation_part] = _vd.last_child;
    00589 }
    00590
    00602 static void AddCombinedSprite(SpriteID image, SpriteID pal, int x, int y, byte z, const SubSprite *sub)
    00603 {
    00604   Point pt = RemapCoords(x, y, z);
    00605   const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
    00606
    00607   if (pt.x + spr->x_offs >= _vd.dpi.left + _vd.dpi.width ||
    00608       pt.x + spr->x_offs + spr->width <= _vd.dpi.left ||
    00609       pt.y + spr->y_offs >= _vd.dpi.top + _vd.dpi.height ||
    00610       pt.y + spr->y_offs + spr->height <= _vd.dpi.top)
    00611     return;
    00612
    00613   const ParentSpriteToDraw *pstd = _vd.parent_sprites_to_draw.End() - 1;
    00614   AddChildSpriteScreen(image, pal, pt.x - pstd->left, pt.y - pstd->top, false, sub);
    00615 }
    00616
    00641 void AddSortableSpriteToDraw(SpriteID image, SpriteID pal, int x, int y, int w, int h, int dz, int z, bool transparent, int bb_offset_x, int bb_offset_y, int bb_offset_z, const SubSprite *sub)
    00642 {
    00643   int32 left, right, top, bottom;
    00644
    00645   assert((image & SPRITE_MASK) < MAX_SPRITES);
    00646
    00647   /* make the sprites transparent with the right palette */
    00648   if (transparent) {
    00649     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
    00650     pal = PALETTE_TO_TRANSPARENT;
    00651   }
    00652
    00653   if (_vd.combine_sprites == SPRITE_COMBINE_ACTIVE) {
    00654     AddCombinedSprite(image, pal, x, y, z, sub);
    00655     return;
    00656   }
    00657
    00658   _vd.last_child = NULL;
    00659
    00660   Point pt = RemapCoords(x, y, z);
    00661   int tmp_left, tmp_top, tmp_x = pt.x, tmp_y = pt.y;
    00662
    00663   /* Compute screen extents of sprite */
    00664   if (image == SPR_EMPTY_BOUNDING_BOX) {
    00665     left = tmp_left = RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x;
    00666     right           = RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1;
    00667     top  = tmp_top  = RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y;
    00668     bottom          = RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1;
    00669   } else {
    00670     const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
    00671     left = tmp_left = (pt.x += spr->x_offs);
    00672     right           = (pt.x +  spr->width );
    00673     top  = tmp_top  = (pt.y += spr->y_offs);
    00674     bottom          = (pt.y +  spr->height);
    00675   }
    00676
    00677   if (_draw_bounding_boxes && (image != SPR_EMPTY_BOUNDING_BOX)) {
    00678     /* Compute maximal extents of sprite and it's bounding box */
    00679     left   = min(left  , RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x);
    00680     right  = max(right , RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1);
    00681     top    = min(top   , RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y);
    00682     bottom = max(bottom, RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1);
    00683   }
    00684
    00685   /* Do not add the sprite to the viewport, if it is outside */
    00686   if (left   >= _vd.dpi.left + _vd.dpi.width ||
    00687       right  <= _vd.dpi.left                 ||
    00688       top    >= _vd.dpi.top + _vd.dpi.height ||
    00689       bottom <= _vd.dpi.top) {
    00690     return;
    00691   }
    00692
    00693   ParentSpriteToDraw *ps = _vd.parent_sprites_to_draw.Append();
    00694   ps->x = tmp_x;
    00695   ps->y = tmp_y;
    00696
    00697   ps->left = tmp_left;
    00698   ps->top  = tmp_top;
    00699
    00700   ps->image = image;
    00701   ps->pal = pal;
    00702   ps->sub = sub;
    00703   ps->xmin = x + bb_offset_x;
    00704   ps->xmax = x + max(bb_offset_x, w) - 1;
    00705
    00706   ps->ymin = y + bb_offset_y;
    00707   ps->ymax = y + max(bb_offset_y, h) - 1;
    00708
    00709   ps->zmin = z + bb_offset_z;
    00710   ps->zmax = z + max(bb_offset_z, dz) - 1;
    00711
    00712   ps->comparison_done = false;
    00713   ps->first_child = -1;
    00714
    00715   _vd.last_child = &ps->first_child;
    00716
    00717   if (_vd.combine_sprites == SPRITE_COMBINE_PENDING) _vd.combine_sprites = SPRITE_COMBINE_ACTIVE;
    00718 }
    00719
    00738 void StartSpriteCombine()
    00739 {
    00740   assert(_vd.combine_sprites == SPRITE_COMBINE_NONE);
    00741   _vd.combine_sprites = SPRITE_COMBINE_PENDING;
    00742 }
    00743
    00748 void EndSpriteCombine()
    00749 {
    00750   assert(_vd.combine_sprites != SPRITE_COMBINE_NONE);
    00751   _vd.combine_sprites = SPRITE_COMBINE_NONE;
    00752 }
    00753
    00764 void AddChildSpriteScreen(SpriteID image, SpriteID pal, int x, int y, bool transparent, const SubSprite *sub)
    00765 {
    00766   assert((image & SPRITE_MASK) < MAX_SPRITES);
    00767
    00768   /* If the ParentSprite was clipped by the viewport bounds, do not draw the ChildSprites either */
    00769   if (_vd.last_child == NULL) return;
    00770
    00771   /* make the sprites transparent with the right palette */
    00772   if (transparent) {
    00773     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
    00774     pal = PALETTE_TO_TRANSPARENT;
    00775   }
    00776
    00777   *_vd.last_child = _vd.child_screen_sprites_to_draw.Length();
    00778
    00779   ChildScreenSpriteToDraw *cs = _vd.child_screen_sprites_to_draw.Append();
    00780   cs->image = image;
    00781   cs->pal = pal;
    00782   cs->sub = sub;
    00783   cs->x = x;
    00784   cs->y = y;
    00785   cs->next = -1;
    00786
    00787   /* Append the sprite to the active ChildSprite list.
    00788    * If the active ParentSprite is a foundation, update last_foundation_child as well.
    00789    * Note: ChildSprites of foundations are NOT sequential in the vector, as selection sprites are added at last. */
    00790   if (_vd.last_foundation_child[0] == _vd.last_child) _vd.last_foundation_child[0] = &cs->next;
    00791   if (_vd.last_foundation_child[1] == _vd.last_child) _vd.last_foundation_child[1] = &cs->next;
    00792   _vd.last_child = &cs->next;
    00793 }
    00794
    00795 static void AddStringToDraw(int x, int y, StringID string, uint64 params_1, uint64 params_2, Colours colour, uint16 width)
    00796 {
    00797   assert(width != 0);
    00798   StringSpriteToDraw *ss = _vd.string_sprites_to_draw.Append();
    00799   ss->string = string;
    00800   ss->x = x;
    00801   ss->y = y;
    00802   ss->params[0] = params_1;
    00803   ss->params[1] = params_2;
    00804   ss->width = width;
    00805   ss->colour = colour;
    00806 }
    00807
    00808
    00820 static void DrawSelectionSprite(SpriteID image, SpriteID pal, const TileInfo *ti, int z_offset, FoundationPart foundation_part)
    00821 {
    00822   /* FIXME: This is not totally valid for some autorail highlights, that extent over the edges of the tile. */
    00823   if (_vd.foundation[foundation_part] == -1) {
    00824     /* draw on real ground */
    00825     AddTileSpriteToDraw(image, pal, ti->x, ti->y, ti->z + z_offset);
    00826   } else {
    00827     /* draw on top of foundation */
    00828     AddChildSpriteToFoundation(image, pal, NULL, foundation_part, 0, -z_offset);
    00829   }
    00830 }
    00831
    00838 static void DrawTileSelectionRect(const TileInfo *ti, SpriteID pal)
    00839 {
    00840   if (!IsValidTile(ti->tile)) return;
    00841
    00842   SpriteID sel;
    00843   if (IsHalftileSlope(ti->tileh)) {
    00844     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
    00845     SpriteID sel2 = SPR_HALFTILE_SELECTION_FLAT + halftile_corner;
    00846     DrawSelectionSprite(sel2, pal, ti, 7 + TILE_HEIGHT, FOUNDATION_PART_HALFTILE);
    00847
    00848     Corner opposite_corner = OppositeCorner(halftile_corner);
    00849     if (IsSteepSlope(ti->tileh)) {
    00850       sel = SPR_HALFTILE_SELECTION_DOWN;
    00851     } else {
    00852       sel = ((ti->tileh & SlopeWithOneCornerRaised(opposite_corner)) != 0 ? SPR_HALFTILE_SELECTION_UP : SPR_HALFTILE_SELECTION_FLAT);
    00853     }
    00854     sel += opposite_corner;
    00855   } else {
    00856     sel = SPR_SELECT_TILE + _tileh_to_sprite[ti->tileh];
    00857   }
    00858   DrawSelectionSprite(sel, pal, ti, 7, FOUNDATION_PART_NORMAL);
    00859 }
    00860
    00861 static bool IsPartOfAutoLine(int px, int py)
    00862 {
    00863   px -= _thd.selstart.x;
    00864   py -= _thd.selstart.y;
    00865
    00866   if ((_thd.drawstyle & ~HT_DIR_MASK) != HT_LINE) return false;
    00867
    00868   switch (_thd.drawstyle & HT_DIR_MASK) {
    00869     case HT_DIR_X:  return py == 0; // x direction
    00870     case HT_DIR_Y:  return px == 0; // y direction
    00871     case HT_DIR_HU: return px == -py || px == -py - 16; // horizontal upper
    00872     case HT_DIR_HL: return px == -py || px == -py + 16; // horizontal lower
    00873     case HT_DIR_VL: return px == py || px == py + 16; // vertival left
    00874     case HT_DIR_VR: return px == py || px == py - 16; // vertical right
    00875     default:
    00876       NOT_REACHED();
    00877   }
    00878 }
    00879
    00880 /* [direction][side] */
    00881 static const HighLightStyle _autorail_type[6][2] = {
    00882   { HT_DIR_X,  HT_DIR_X },
    00883   { HT_DIR_Y,  HT_DIR_Y },
    00884   { HT_DIR_HU, HT_DIR_HL },
    00885   { HT_DIR_HL, HT_DIR_HU },
    00886   { HT_DIR_VL, HT_DIR_VR },
    00887   { HT_DIR_VR, HT_DIR_VL }
    00888 };
    00889
    00890 #include "table/autorail.h"
    00891
    00898 static void DrawAutorailSelection(const TileInfo *ti, uint autorail_type)
    00899 {
    00900   SpriteID image;
    00901   SpriteID pal;
    00902   int offset;
    00903
    00904   FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
    00905   Slope autorail_tileh = RemoveHalftileSlope(ti->tileh);
    00906   if (IsHalftileSlope(ti->tileh)) {
    00907     static const uint _lower_rail[4] = { 5U, 2U, 4U, 3U };
    00908     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
    00909     if (autorail_type != _lower_rail[halftile_corner]) {
    00910       foundation_part = FOUNDATION_PART_HALFTILE;
    00911       /* Here we draw the highlights of the "three-corners-raised"-slope. That looks ok to me. */
    00912       autorail_tileh = SlopeWithThreeCornersRaised(OppositeCorner(halftile_corner));
    00913     }
    00914   }
    00915
    00916   offset = _AutorailTilehSprite[autorail_tileh][autorail_type];
    00917   if (offset >= 0) {
    00918     image = SPR_AUTORAIL_BASE + offset;
    00919     pal = PAL_NONE;
    00920   } else {
    00921     image = SPR_AUTORAIL_BASE - offset;
    00922     pal = PALETTE_SEL_TILE_RED;
    00923   }
    00924
    00925   DrawSelectionSprite(image, _thd.make_square_red ? PALETTE_SEL_TILE_RED : pal, ti, 7, foundation_part);
    00926 }
    00927
    00932 static void DrawTileSelection(const TileInfo *ti)
    00933 {
    00934   /* Draw a red error square? */
    00935   bool is_redsq = _thd.redsq == ti->tile;
    00936   if (is_redsq) DrawTileSelectionRect(ti, PALETTE_TILE_RED_PULSATING);
    00937
    00938   /* no selection active? */
    00939   if (_thd.drawstyle == 0) return;
    00940
    00941   /* Inside the inner area? */
    00942   if (IsInsideBS(ti->x, _thd.pos.x, _thd.size.x) &&
    00943       IsInsideBS(ti->y, _thd.pos.y, _thd.size.y)) {
    00944     if (_thd.drawstyle & HT_RECT) {
    00945       if (!is_redsq) DrawTileSelectionRect(ti, _thd.make_square_red ? PALETTE_SEL_TILE_RED : PAL_NONE);
    00946     } else if (_thd.drawstyle & HT_POINT) {
    00947       /* Figure out the Z coordinate for the single dot. */
    00948       byte z = 0;
    00949       FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
    00950       if (ti->tileh & SLOPE_N) {
    00951         z += TILE_HEIGHT;
    00952         if (RemoveHalftileSlope(ti->tileh) == SLOPE_STEEP_N) z += TILE_HEIGHT;
    00953       }
    00954       if (IsHalftileSlope(ti->tileh)) {
    00955         Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
    00956         if ((halftile_corner == CORNER_W) || (halftile_corner == CORNER_E)) z += TILE_HEIGHT;
    00957         if (halftile_corner != CORNER_S) {
    00958           foundation_part = FOUNDATION_PART_HALFTILE;
    00959           if (IsSteepSlope(ti->tileh)) z -= TILE_HEIGHT;
    00960         }
    00961       }
    00962       DrawSelectionSprite(_cur_dpi->zoom <= ZOOM_LVL_DETAIL ? SPR_DOT : SPR_DOT_SMALL, PAL_NONE, ti, z, foundation_part);
    00963     } else if (_thd.drawstyle & HT_RAIL) {
    00964       /* autorail highlight piece under cursor */
    00965       HighLightStyle type = _thd.drawstyle & HT_DIR_MASK;
    00966       assert(type < HT_DIR_END);
    00967       DrawAutorailSelection(ti, _autorail_type[type][0]);
    00968     } else if (IsPartOfAutoLine(ti->x, ti->y)) {
    00969       /* autorail highlighting long line */
    00970       HighLightStyle dir = _thd.drawstyle & HT_DIR_MASK;
    00971       uint side;
    00972
    00973       if (dir == HT_DIR_X || dir == HT_DIR_Y) {
    00974         side = 0;
    00975       } else {
    00976         TileIndex start = TileVirtXY(_thd.selstart.x, _thd.selstart.y);
    00977         side = Delta(Delta(TileX(start), TileX(ti->tile)), Delta(TileY(start), TileY(ti->tile)));
    00978       }
    00979
    00980       DrawAutorailSelection(ti, _autorail_type[dir][side]);
    00981     }
    00982     return;
    00983   }
    00984
    00985   /* Check if it's inside the outer area? */
    00986   if (!is_redsq && _thd.outersize.x &&
    00987       _thd.size.x < _thd.size.x + _thd.outersize.x &&
    00988       IsInsideBS(ti->x, _thd.pos.x + _thd.offs.x, _thd.size.x + _thd.outersize.x) &&
    00989       IsInsideBS(ti->y, _thd.pos.y + _thd.offs.y, _thd.size.y + _thd.outersize.y)) {
    00990     /* Draw a blue rect. */
    00991     DrawTileSelectionRect(ti, PALETTE_SEL_TILE_BLUE);
    00992     return;
    00993   }
    00994 }
    00995
    00996 static void ViewportAddLandscape()
    00997 {
    00998   int x, y, width, height;
    00999   TileInfo ti;
    01000   bool direction;
    01001
    01002   _cur_ti = &ti;
    01003
    01004   /* Transform into tile coordinates and round to closest full tile */
    01005   x = ((_vd.dpi.top >> 1) - (_vd.dpi.left >> 2)) & ~TILE_UNIT_MASK;
    01006   y = ((_vd.dpi.top >> 1) + (_vd.dpi.left >> 2) - TILE_SIZE) & ~TILE_UNIT_MASK;
    01007
    01008   /* determine size of area */
    01009   {
    01010     Point pt = RemapCoords(x, y, 241);
    01011     width = (_vd.dpi.left + _vd.dpi.width - pt.x + 95) >> 6;
    01012     height = (_vd.dpi.top + _vd.dpi.height - pt.y) >> 5 << 1;
    01013   }
    01014
    01015   assert(width > 0);
    01016   assert(height > 0);
    01017
    01018   direction = false;
    01019
    01020   do {
    01021     int width_cur = width;
    01022     int x_cur = x;
    01023     int y_cur = y;
    01024
    01025     do {
    01026       TileType tt = MP_VOID;
    01027
    01028       ti.x = x_cur;
    01029       ti.y = y_cur;
    01030
    01031       ti.z = 0;
    01032
    01033       ti.tileh = SLOPE_FLAT;
    01034       ti.tile = INVALID_TILE;
    01035
    01036       if (0 <= x_cur && x_cur < (int)MapMaxX() * TILE_SIZE &&
    01037           0 <= y_cur && y_cur < (int)MapMaxY() * TILE_SIZE) {
    01038         TileIndex tile = TileVirtXY(x_cur, y_cur);
    01039
    01040         if (!_settings_game.construction.freeform_edges || (TileX(tile) != 0 && TileY(tile) != 0)) {
    01041           if (x_cur == ((int)MapMaxX() - 1) * TILE_SIZE || y_cur == ((int)MapMaxY() - 1) * TILE_SIZE) {
    01042             uint maxh = max<uint>(TileHeight(tile), 1);
    01043             for (uint h = 0; h < maxh; h++) {
    01044               AddTileSpriteToDraw(SPR_SHADOW_CELL, PAL_NONE, ti.x, ti.y, h * TILE_HEIGHT);
    01045             }
    01046           }
    01047
    01048           ti.tile = tile;
    01049           ti.tileh = GetTileSlope(tile, &ti.z);
    01050           tt = GetTileType(tile);
    01051         }
    01052       }
    01053
    01054       _vd.foundation_part = FOUNDATION_PART_NONE;
    01055       _vd.foundation[0] = -1;
    01056       _vd.foundation[1] = -1;
    01057       _vd.last_foundation_child[0] = NULL;
    01058       _vd.last_foundation_child[1] = NULL;
    01059
    01060       _tile_type_procs[tt]->draw_tile_proc(&ti);
    01061
    01062       if ((x_cur == (int)MapMaxX() * TILE_SIZE && IsInsideMM(y_cur, 0, MapMaxY() * TILE_SIZE + 1)) ||
    01063         (y_cur == (int)MapMaxY() * TILE_SIZE && IsInsideMM(x_cur, 0, MapMaxX() * TILE_SIZE + 1))) {
    01064         TileIndex tile = TileVirtXY(x_cur, y_cur);
    01065         ti.tile = tile;
    01066         ti.tileh = GetTileSlope(tile, &ti.z);
    01067         tt = GetTileType(tile);
    01068       }
    01069       if (ti.tile != INVALID_TILE) DrawTileSelection(&ti);
    01070
    01071       y_cur += 0x10;
    01072       x_cur -= 0x10;
    01073     } while (--width_cur);
    01074
    01075     if ((direction ^= 1) != 0) {
    01076       y += 0x10;
    01077     } else {
    01078       x += 0x10;
    01079     }
    01080   } while (--height);
    01081 }
    01082
    01093 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)
    01094 {
    01095   bool small = dpi->zoom >= small_from;
    01096
    01097   int left   = dpi->left;
    01098   int top    = dpi->top;
    01099   int right  = left + dpi->width;
    01100   int bottom = top + dpi->height;
    01101
    01102   int sign_height     = ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM, dpi->zoom);
    01103   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, dpi->zoom);
    01104
    01105   if (bottom < sign->top ||
    01106       top   > sign->top + sign_height ||
    01107       right < sign->center - sign_half_width ||
    01108       left  > sign->center + sign_half_width) {
    01109     return;
    01110   }
    01111
    01112   if (!small) {
    01113     AddStringToDraw(sign->center - sign_half_width, sign->top, string_normal, params_1, params_2, colour, sign->width_normal);
    01114   } else {
    01115     int shadow_offset = 0;
    01116     if (string_small_shadow != STR_NULL) {
    01117       shadow_offset = 4;
    01118       AddStringToDraw(sign->center - sign_half_width + shadow_offset, sign->top, string_small_shadow, params_1, params_2, INVALID_COLOUR, sign->width_small);
    01119     }
    01120     AddStringToDraw(sign->center - sign_half_width, sign->top - shadow_offset, string_small, params_1, params_2,
    01121         colour, sign->width_small | 0x8000);
    01122   }
    01123 }
    01124
    01125 static void ViewportAddTownNames(DrawPixelInfo *dpi)
    01126 {
    01127   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES) || _game_mode == GM_MENU) return;
    01128
    01129   const Town *t;
    01130   FOR_ALL_TOWNS(t) {
    01131     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &t->sign,
    01132         _settings_client.gui.population_in_label ? STR_VIEWPORT_TOWN_POP : STR_VIEWPORT_TOWN,
    01133         STR_VIEWPORT_TOWN_TINY_WHITE, STR_VIEWPORT_TOWN_TINY_BLACK,
    01134         t->index, t->population);
    01135   }
    01136 }
    01137
    01138
    01139 static void ViewportAddStationNames(DrawPixelInfo *dpi)
    01140 {
    01141   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || _game_mode == GM_MENU) return;
    01142
    01143   const BaseStation *st;
    01144   FOR_ALL_BASE_STATIONS(st) {
    01145     /* Check whether the base station is a station or a waypoint */
    01146     bool is_station = Station::IsExpected(st);
    01147
    01148     /* Don't draw if the display options are disabled */
    01149     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
    01150
    01151     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &st->sign,
    01152         is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT,
    01153         (is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT) + 1, STR_NULL,
    01154         st->index, st->facilities, (st->owner == OWNER_NONE || !st->IsInUse()) ? COLOUR_GREY : _company_colours[st->owner]);
    01155   }
    01156 }
    01157
    01158
    01159 static void ViewportAddSigns(DrawPixelInfo *dpi)
    01160 {
    01161   /* Signs are turned off or are invisible */
    01162   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS)) return;
    01163
    01164   const Sign *si;
    01165   FOR_ALL_SIGNS(si) {
    01166     ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &si->sign,
    01167         STR_WHITE_SIGN,
    01168         IsTransparencySet(TO_SIGNS) ? STR_VIEWPORT_SIGN_SMALL_WHITE : STR_VIEWPORT_SIGN_SMALL_BLACK, STR_NULL,
    01169         si->index, 0, (si->owner == OWNER_NONE) ? COLOUR_GREY : _company_colours[si->owner]);
    01170   }
    01171 }
    01172
    01179 void ViewportSign::UpdatePosition(int center, int top, StringID str)
    01180 {
    01181   if (this->width_normal != 0) this->MarkDirty();
    01182
    01183   this->top = top;
    01184
    01185   char buffer[DRAW_STRING_BUFFER];
    01186
    01187   GetString(buffer, str, lastof(buffer));
    01188   this->width_normal = VPSM_LEFT + Align(GetStringBoundingBox(buffer).width, 2) + VPSM_RIGHT;
    01189   this->center = center;
    01190
    01191   /* zoomed out version */
    01192   _cur_fontsize = FS_SMALL;
    01193   this->width_small = VPSM_LEFT + Align(GetStringBoundingBox(buffer).width, 2) + VPSM_RIGHT;
    01194   _cur_fontsize = FS_NORMAL;
    01195
    01196   this->MarkDirty();
    01197 }
    01198
    01204 void ViewportSign::MarkDirty() const
    01205 {
    01206   /* We use ZOOM_LVL_MAX here, as every viewport can have another zoom,
    01207    *  and there is no way for us to know which is the biggest. So make the
    01208    *  biggest area dirty, and we are safe for sure.
    01209    * We also add 1 to make sure the whole thing is redrawn. */
    01210   MarkAllViewportsDirty(
    01211     this->center - ScaleByZoom(this->width_normal / 2 + 1, ZOOM_LVL_MAX),
    01212     this->top    - ScaleByZoom(1, ZOOM_LVL_MAX),
    01213     this->center + ScaleByZoom(this->width_normal / 2 + 1, ZOOM_LVL_MAX),
    01214     this->top    + ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM + 1, ZOOM_LVL_MAX));
    01215 }
    01216
    01217 static void ViewportDrawTileSprites(const TileSpriteToDrawVector *tstdv)
    01218 {
    01219   const TileSpriteToDraw *tsend = tstdv->End();
    01220   for (const TileSpriteToDraw *ts = tstdv->Begin(); ts != tsend; ++ts) {
    01221     DrawSprite(ts->image, ts->pal, ts->x, ts->y, ts->sub);
    01222   }
    01223 }
    01224
    01226 static void ViewportSortParentSprites(ParentSpriteToSortVector *psdv)
    01227 {
    01228   ParentSpriteToDraw **psdvend = psdv->End();
    01229   ParentSpriteToDraw **psd = psdv->Begin();
    01230   while (psd != psdvend) {
    01231     ParentSpriteToDraw *ps = *psd;
    01232
    01233     if (ps->comparison_done) {
    01234       psd++;
    01235       continue;
    01236     }
    01237
    01238     ps->comparison_done = true;
    01239
    01240     for (ParentSpriteToDraw **psd2 = psd + 1; psd2 != psdvend; psd2++) {
    01241       ParentSpriteToDraw *ps2 = *psd2;
    01242
    01243       if (ps2->comparison_done) continue;
    01244
    01245       /* Decide which comparator to use, based on whether the bounding
    01246        * boxes overlap
    01247        */
    01248       if (ps->xmax >= ps2->xmin && ps->xmin <= ps2->xmax && // overlap in X?
    01249           ps->ymax >= ps2->ymin && ps->ymin <= ps2->ymax && // overlap in Y?
    01250           ps->zmax >= ps2->zmin && ps->zmin <= ps2->zmax) { // overlap in Z?
    01251         /* Use X+Y+Z as the sorting order, so sprites closer to the bottom of
    01252          * the screen and with higher Z elevation, are drawn in front.
    01253          * Here X,Y,Z are the coordinates of the "center of mass" of the sprite,
    01254          * i.e. X=(left+right)/2, etc.
    01255          * However, since we only care about order, don't actually divide / 2
    01256          */
    01257         if (ps->xmin + ps->xmax + ps->ymin + ps->ymax + ps->zmin + ps->zmax <=
    01258             ps2->xmin + ps2->xmax + ps2->ymin + ps2->ymax + ps2->zmin + ps2->zmax) {
    01259           continue;
    01260         }
    01261       } else {
    01262         /* We only change the order, if it is definite.
    01263          * I.e. every single order of X, Y, Z says ps2 is behind ps or they overlap.
    01264          * That is: If one partial order says ps behind ps2, do not change the order.
    01265          */
    01266         if (ps->xmax < ps2->xmin ||
    01267             ps->ymax < ps2->ymin ||
    01268             ps->zmax < ps2->zmin) {
    01269           continue;
    01270         }
    01271       }
    01272
    01273       /* Move ps2 in front of ps */
    01274       ParentSpriteToDraw *temp = ps2;
    01275       for (ParentSpriteToDraw **psd3 = psd2; psd3 > psd; psd3--) {
    01276         *psd3 = *(psd3 - 1);
    01277       }
    01278       *psd = temp;
    01279     }
    01280   }
    01281 }
    01282
    01283 static void ViewportDrawParentSprites(const ParentSpriteToSortVector *psd, const ChildScreenSpriteToDrawVector *csstdv)
    01284 {
    01285   const ParentSpriteToDraw * const *psd_end = psd->End();
    01286   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
    01287     const ParentSpriteToDraw *ps = *it;
    01288     if (ps->image != SPR_EMPTY_BOUNDING_BOX) DrawSprite(ps->image, ps->pal, ps->x, ps->y, ps->sub);
    01289
    01290     int child_idx = ps->first_child;
    01291     while (child_idx >= 0) {
    01292       const ChildScreenSpriteToDraw *cs = csstdv->Get(child_idx);
    01293       child_idx = cs->next;
    01294       DrawSprite(cs->image, cs->pal, ps->left + cs->x, ps->top + cs->y, cs->sub);
    01295     }
    01296   }
    01297 }
    01298
    01303 static void ViewportDrawBoundingBoxes(const ParentSpriteToSortVector *psd)
    01304 {
    01305   const ParentSpriteToDraw * const *psd_end = psd->End();
    01306   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
    01307     const ParentSpriteToDraw *ps = *it;
    01308     Point pt1 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmax + 1); // top front corner
    01309     Point pt2 = RemapCoords(ps->xmin    , ps->ymax + 1, ps->zmax + 1); // top left corner
    01310     Point pt3 = RemapCoords(ps->xmax + 1, ps->ymin    , ps->zmax + 1); // top right corner
    01311     Point pt4 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmin    ); // bottom front corner
    01312
    01313     DrawBox(        pt1.x,         pt1.y,
    01314             pt2.x - pt1.x, pt2.y - pt1.y,
    01315             pt3.x - pt1.x, pt3.y - pt1.y,
    01316             pt4.x - pt1.x, pt4.y - pt1.y);
    01317   }
    01318 }
    01319
    01320 static void ViewportDrawStrings(DrawPixelInfo *dpi, const StringSpriteToDrawVector *sstdv)
    01321 {
    01322   DrawPixelInfo dp;
    01323   ZoomLevel zoom;
    01324
    01325   _cur_dpi = &dp;
    01326   dp = *dpi;
    01327
    01328   zoom = dp.zoom;
    01329   dp.zoom = ZOOM_LVL_NORMAL;
    01330
    01331   dp.left   = UnScaleByZoom(dp.left,   zoom);
    01332   dp.top    = UnScaleByZoom(dp.top,    zoom);
    01333   dp.width  = UnScaleByZoom(dp.width,  zoom);
    01334   dp.height = UnScaleByZoom(dp.height, zoom);
    01335
    01336   const StringSpriteToDraw *ssend = sstdv->End();
    01337   for (const StringSpriteToDraw *ss = sstdv->Begin(); ss != ssend; ++ss) {
    01338     TextColour colour = TC_BLACK;
    01339     bool small = HasBit(ss->width, 15);
    01340     int w = GB(ss->width, 0, 15);
    01341     int x = UnScaleByZoom(ss->x, zoom);
    01342     int y = UnScaleByZoom(ss->y, zoom);
    01343     int h = VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM;
    01344
    01345     SetDParam(0, ss->params[0]);
    01346     SetDParam(1, ss->params[1]);
    01347
    01348     if (ss->colour != INVALID_COLOUR) {
    01349       /* Do not draw signs nor station names if they are set invisible */
    01350       if (IsInvisibilitySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) continue;
    01351
    01352       /* if we didn't draw a rectangle, or if transparant building is on,
    01353        * draw the text in the colour the rectangle would have */
    01354       if (IsTransparencySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) {
    01355         /* Real colours need the IS_PALETTE_COLOUR flag
    01356          * otherwise colours from _string_colourmap are assumed. */
    01357         colour = (TextColour)_colour_gradient[ss->colour][6] | IS_PALETTE_COLOUR;
    01358       }
    01359
    01360       /* Draw the rectangle if 'tranparent station signs' is off,
    01361        * or if we are drawing a general text sign (STR_WHITE_SIGN) */
    01362       if (!IsTransparencySet(TO_SIGNS) || ss->string == STR_WHITE_SIGN) {
    01363         DrawFrameRect(
    01364           x, y, x + w, y + h, ss->colour,
    01365           IsTransparencySet(TO_SIGNS) ? FR_TRANSPARENT : FR_NONE
    01366         );
    01367       }
    01368     }
    01369
    01370     DrawString(x + VPSM_LEFT, x + w - 1 - VPSM_RIGHT, y + VPSM_TOP, ss->string, colour, SA_CENTER);
    01371   }
    01372 }
    01373
    01374 void ViewportDoDraw(const ViewPort *vp, int left, int top, int right, int bottom)
    01375 {
    01376   DrawPixelInfo *old_dpi = _cur_dpi;
    01377   _cur_dpi = &_vd.dpi;
    01378
    01379   _vd.dpi.zoom = vp->zoom;
    01380   int mask = ScaleByZoom(-1, vp->zoom);
    01381
    01382   _vd.combine_sprites = SPRITE_COMBINE_NONE;
    01383
    01384   _vd.dpi.width = (right - left) & mask;
    01385   _vd.dpi.height = (bottom - top) & mask;
    01386   _vd.dpi.left = left & mask;
    01387   _vd.dpi.top = top & mask;
    01388   _vd.dpi.pitch = old_dpi->pitch;
    01389   _vd.last_child = NULL;
    01390
    01391   int x = UnScaleByZoom(_vd.dpi.left - (vp->virtual_left & mask), vp->zoom) + vp->left;
    01392   int y = UnScaleByZoom(_vd.dpi.top - (vp->virtual_top & mask), vp->zoom) + vp->top;
    01393
    01394   _vd.dpi.dst_ptr = BlitterFactoryBase::GetCurrentBlitter()->MoveTo(old_dpi->dst_ptr, x - old_dpi->left, y - old_dpi->top);
    01395
    01396   ViewportAddLandscape();
    01397   ViewportAddVehicles(&_vd.dpi);
    01398
    01399   ViewportAddTownNames(&_vd.dpi);
    01400   ViewportAddStationNames(&_vd.dpi);
    01401   ViewportAddSigns(&_vd.dpi);
    01402
    01403   DrawTextEffects(&_vd.dpi);
    01404
    01405   if (_vd.tile_sprites_to_draw.Length() != 0) ViewportDrawTileSprites(&_vd.tile_sprites_to_draw);
    01406
    01407   ParentSpriteToDraw *psd_end = _vd.parent_sprites_to_draw.End();
    01408   for (ParentSpriteToDraw *it = _vd.parent_sprites_to_draw.Begin(); it != psd_end; it++) {
    01409     *_vd.parent_sprites_to_sort.Append() = it;
    01410   }
    01411
    01412   ViewportSortParentSprites(&_vd.parent_sprites_to_sort);
    01413   ViewportDrawParentSprites(&_vd.parent_sprites_to_sort, &_vd.child_screen_sprites_to_draw);
    01414
    01415   if (_draw_bounding_boxes) ViewportDrawBoundingBoxes(&_vd.parent_sprites_to_sort);
    01416
    01417   if (_vd.string_sprites_to_draw.Length() != 0) ViewportDrawStrings(&_vd.dpi, &_vd.string_sprites_to_draw);
    01418
    01419   _cur_dpi = old_dpi;
    01420
    01421   _vd.string_sprites_to_draw.Clear();
    01422   _vd.tile_sprites_to_draw.Clear();
    01423   _vd.parent_sprites_to_draw.Clear();
    01424   _vd.parent_sprites_to_sort.Clear();
    01425   _vd.child_screen_sprites_to_draw.Clear();
    01426 }
    01427
    01430 static void ViewportDrawChk(const ViewPort *vp, int left, int top, int right, int bottom)
    01431 {
    01432   if (ScaleByZoom(bottom - top, vp->zoom) * ScaleByZoom(right - left, vp->zoom) > 180000) {
    01433     if ((bottom - top) > (right - left)) {
    01434       int t = (top + bottom) >> 1;
    01435       ViewportDrawChk(vp, left, top, right, t);
    01436       ViewportDrawChk(vp, left, t, right, bottom);
    01437     } else {
    01438       int t = (left + right) >> 1;
    01439       ViewportDrawChk(vp, left, top, t, bottom);
    01440       ViewportDrawChk(vp, t, top, right, bottom);
    01441     }
    01442   } else {
    01443     ViewportDoDraw(vp,
    01444       ScaleByZoom(left - vp->left, vp->zoom) + vp->virtual_left,
    01445       ScaleByZoom(top - vp->top, vp->zoom) + vp->virtual_top,
    01446       ScaleByZoom(right - vp->left, vp->zoom) + vp->virtual_left,
    01447       ScaleByZoom(bottom - vp->top, vp->zoom) + vp->virtual_top
    01448     );
    01449   }
    01450 }
    01451
    01452 static inline void ViewportDraw(const ViewPort *vp, int left, int top, int right, int bottom)
    01453 {
    01454   if (right <= vp->left || bottom <= vp->top) return;
    01455
    01456   if (left >= vp->left + vp->width) return;
    01457
    01458   if (left < vp->left) left = vp->left;
    01459   if (right > vp->left + vp->width) right = vp->left + vp->width;
    01460
    01461   if (top >= vp->top + vp->height) return;
    01462
    01463   if (top < vp->top) top = vp->top;
    01464   if (bottom > vp->top + vp->height) bottom = vp->top + vp->height;
    01465
    01466   ViewportDrawChk(vp, left, top, right, bottom);
    01467 }
    01468
    01472 void Window::DrawViewport() const
    01473 {
    01474   DrawPixelInfo *dpi = _cur_dpi;
    01475
    01476   dpi->left += this->left;
    01477   dpi->top += this->top;
    01478
    01479   ViewportDraw(this->viewport, dpi->left, dpi->top, dpi->left + dpi->width, dpi->top + dpi->height);
    01480
    01481   dpi->left -= this->left;
    01482   dpi->top -= this->top;
    01483 }
    01484
    01485 static inline void ClampViewportToMap(const ViewPort *vp, int &x, int &y)
    01486 {
    01487   /* Centre of the viewport is hot spot */
    01488   x += vp->virtual_width / 2;
    01489   y += vp->virtual_height / 2;
    01490
    01491   /* Convert viewport coordinates to map coordinates
    01492    * Calculation is scaled by 4 to avoid rounding errors */
    01493   int vx = -x + y * 2;
    01494   int vy =  x + y * 2;
    01495
    01496   /* clamp to size of map */
    01497   vx = Clamp(vx, 0, MapMaxX() * TILE_SIZE * 4);
    01498   vy = Clamp(vy, 0, MapMaxY() * TILE_SIZE * 4);
    01499
    01500   /* Convert map coordinates to viewport coordinates */
    01501   x = (-vx + vy) / 2;
    01502   y = ( vx + vy) / 4;
    01503
    01504   /* Remove centreing */
    01505   x -= vp->virtual_width / 2;
    01506   y -= vp->virtual_height / 2;
    01507 }
    01508
    01513 void UpdateViewportPosition(Window *w)
    01514 {
    01515   const ViewPort *vp = w->viewport;
    01516
    01517   if (w->viewport->follow_vehicle != INVALID_VEHICLE) {
    01518     const Vehicle *veh = Vehicle::Get(w->viewport->follow_vehicle);
    01519     Point pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
    01520
    01521     w->viewport->scrollpos_x = pt.x;
    01522     w->viewport->scrollpos_y = pt.y;
    01523     SetViewportPosition(w, pt.x, pt.y);
    01524   } else {
    01525     /* Ensure the destination location is within the map */
    01526     ClampViewportToMap(vp, w->viewport->dest_scrollpos_x, w->viewport->dest_scrollpos_y);
    01527
    01528     int delta_x = w->viewport->dest_scrollpos_x - w->viewport->scrollpos_x;
    01529     int delta_y = w->viewport->dest_scrollpos_y - w->viewport->scrollpos_y;
    01530
    01531     if (delta_x != 0 || delta_y != 0) {
    01532       if (_settings_client.gui.smooth_scroll) {
    01533         int max_scroll = ScaleByMapSize1D(512);
    01534         /* Not at our desired positon yet... */
    01535         w->viewport->scrollpos_x += Clamp(delta_x / 4, -max_scroll, max_scroll);
    01536         w->viewport->scrollpos_y += Clamp(delta_y / 4, -max_scroll, max_scroll);
    01537       } else {
    01538         w->viewport->scrollpos_x = w->viewport->dest_scrollpos_x;
    01539         w->viewport->scrollpos_y = w->viewport->dest_scrollpos_y;
    01540       }
    01541     }
    01542
    01543     ClampViewportToMap(vp, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
    01544
    01545     SetViewportPosition(w, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
    01546   }
    01547 }
    01548
    01558 static void MarkViewportDirty(const ViewPort *vp, int left, int top, int right, int bottom)
    01559 {
    01560   right -= vp->virtual_left;
    01561   if (right <= 0) return;
    01562
    01563   bottom -= vp->virtual_top;
    01564   if (bottom <= 0) return;
    01565
    01566   left = max(0, left - vp->virtual_left);
    01567
    01568   if (left >= vp->virtual_width) return;
    01569
    01570   top = max(0, top - vp->virtual_top);
    01571
    01572   if (top >= vp->virtual_height) return;
    01573
    01574   SetDirtyBlocks(
    01575     UnScaleByZoomLower(left, vp->zoom) + vp->left,
    01576     UnScaleByZoomLower(top, vp->zoom) + vp->top,
    01577     UnScaleByZoom(right, vp->zoom) + vp->left + 1,
    01578     UnScaleByZoom(bottom, vp->zoom) + vp->top + 1
    01579   );
    01580 }
    01581
    01590 void MarkAllViewportsDirty(int left, int top, int right, int bottom)
    01591 {
    01592   Window *w;
    01593   FOR_ALL_WINDOWS_FROM_BACK(w) {
    01594     ViewPort *vp = w->viewport;
    01595     if (vp != NULL) {
    01596       assert(vp->width != 0);
    01597       MarkViewportDirty(vp, left, top, right, bottom);
    01598     }
    01599   }
    01600 }
    01601
    01602 void MarkTileDirtyByTile(TileIndex tile)
    01603 {
    01604   Point pt = RemapCoords(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, GetTileZ(tile));
    01605   MarkAllViewportsDirty(
    01606     pt.x - 31,
    01607     pt.y - 122,
    01608     pt.x - 31 + 67,
    01609     pt.y - 122 + 154
    01610   );
    01611 }
    01612
    01620 static void SetSelectionTilesDirty()
    01621 {
    01622   int x_start = _thd.pos.x;
    01623   int y_start = _thd.pos.y;
    01624
    01625   int x_size = _thd.size.x;
    01626   int y_size = _thd.size.y;
    01627
    01628   if (_thd.outersize.x != 0) {
    01629     x_size  += _thd.outersize.x;
    01630     x_start += _thd.offs.x;
    01631     y_size  += _thd.outersize.y;
    01632     y_start += _thd.offs.y;
    01633   }
    01634
    01635   x_size -= TILE_SIZE;
    01636   y_size -= TILE_SIZE;
    01637
    01638   assert(x_size >= 0);
    01639   assert(y_size >= 0);
    01640
    01641   int x_end = Clamp(x_start + x_size, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
    01642   int y_end = Clamp(y_start + y_size, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
    01643
    01644   x_start = Clamp(x_start, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
    01645   y_start = Clamp(y_start, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
    01646
    01647   /* make sure everything is multiple of TILE_SIZE */
    01648   assert((x_end | y_end | x_start | y_start) % TILE_SIZE == 0);
    01649
    01650   /* How it works:
    01651    * Suppose we have to mark dirty rectangle of 3x4 tiles:
    01652    *   x
    01653    *  xxx
    01654    * xxxxx
    01655    *  xxxxx
    01656    *   xxx
    01657    *    x
    01658    * This algorithm marks dirty columns of tiles, so it is done in 3+4-1 steps:
    01659    * 1)  x     2)  x
    01660    *    xxx       Oxx
    01661    *   Oxxxx     xOxxx
    01662    *    xxxxx     Oxxxx
    01663    *     xxx       xxx
    01664    *      x         x
    01665    * And so forth...
    01666    */
    01667
    01668   int top_x = x_end; // coordinates of top dirty tile
    01669   int top_y = y_start;
    01670   int bot_x = top_x; // coordinates of bottom dirty tile
    01671   int bot_y = top_y;
    01672
    01673   do {
    01674     Point top = RemapCoords2(top_x, top_y); // topmost dirty point
    01675     Point bot = RemapCoords2(bot_x + TILE_SIZE - 1, bot_y + TILE_SIZE - 1); // bottommost point
    01676
    01677     /* the 'x' coordinate of 'top' and 'bot' is the same (and always in the same distance from tile middle),
    01678      * tile height/slope affects only the 'y' on-screen coordinate! */
    01679
    01680     int l = top.x - (TILE_PIXELS - 2); // 'x' coordinate of left side of dirty rectangle
    01681     int t = top.y;                     // 'y' coordinate of top side -//-
    01682     int r = top.x + (TILE_PIXELS - 2); // right side of dirty rectangle
    01683     int b = bot.y;                     // bottom -//-
    01684
    01685     static const int OVERLAY_WIDTH = 4; // part of selection sprites is drawn outside the selected area
    01686
    01687     /* For halftile foundations on SLOPE_STEEP_S the sprite extents some more towards the top */
    01688     MarkAllViewportsDirty(l - OVERLAY_WIDTH, t - OVERLAY_WIDTH - TILE_HEIGHT, r + OVERLAY_WIDTH, b + OVERLAY_WIDTH);
    01689
    01690     /* haven't we reached the topmost tile yet? */
    01691     if (top_x != x_start) {
    01692       top_x -= TILE_SIZE;
    01693     } else {
    01694       top_y += TILE_SIZE;
    01695     }
    01696
    01697     /* the way the bottom tile changes is different when we reach the bottommost tile */
    01698     if (bot_y != y_end) {
    01699       bot_y += TILE_SIZE;
    01700     } else {
    01701       bot_x -= TILE_SIZE;
    01702     }
    01703   } while (bot_x >= top_x);
    01704 }
    01705
    01706
    01707 void SetSelectionRed(bool b)
    01708 {
    01709   _thd.make_square_red = b;
    01710   SetSelectionTilesDirty();
    01711 }
    01712
    01721 static bool CheckClickOnViewportSign(const ViewPort *vp, int x, int y, const ViewportSign *sign)
    01722 {
    01723   bool small = (vp->zoom >= ZOOM_LVL_OUT_4X);
    01724   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, vp->zoom);
    01725   int sign_height = ScaleByZoom(VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM, vp->zoom);
    01726
    01727   x = ScaleByZoom(x - vp->left, vp->zoom) + vp->virtual_left;
    01728   y = ScaleByZoom(y - vp->top, vp->zoom) + vp->virtual_top;
    01729
    01730   return
    01731       y >= sign->top &&
    01732       y <  sign->top + sign_height &&
    01733       x >= sign->center - sign_half_width &&
    01734       x <  sign->center + sign_half_width;
    01735 }
    01736
    01737 static bool CheckClickOnTown(const ViewPort *vp, int x, int y)
    01738 {
    01739   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES)) return false;
    01740
    01741   const Town *t;
    01742   FOR_ALL_TOWNS(t) {
    01743     if (CheckClickOnViewportSign(vp, x, y, &t->sign)) {
    01744       ShowTownViewWindow(t->index);
    01745       return true;
    01746     }
    01747   }
    01748
    01749   return false;
    01750 }
    01751
    01752 static bool CheckClickOnStation(const ViewPort *vp, int x, int y)
    01753 {
    01754   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || IsInvisibilitySet(TO_SIGNS)) return false;
    01755
    01756   const BaseStation *st;
    01757   FOR_ALL_BASE_STATIONS(st) {
    01758     /* Check whether the base station is a station or a waypoint */
    01759     bool is_station = Station::IsExpected(st);
    01760
    01761     /* Don't check if the display options are disabled */
    01762     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
    01763
    01764     if (CheckClickOnViewportSign(vp, x, y, &st->sign)) {
    01765       if (is_station) {
    01766         ShowStationViewWindow(st->index);
    01767       } else {
    01768         ShowWaypointWindow(Waypoint::From(st));
    01769       }
    01770       return true;
    01771     }
    01772   }
    01773
    01774   return false;
    01775 }
    01776
    01777
    01778 static bool CheckClickOnSign(const ViewPort *vp, int x, int y)
    01779 {
    01780   /* Signs are turned off, or they are transparent and invisibility is ON, or company is a spectator */
    01781   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS) || _current_company == COMPANY_SPECTATOR) return false;
    01782
    01783   const Sign *si;
    01784   FOR_ALL_SIGNS(si) {
    01785     if (CheckClickOnViewportSign(vp, x, y, &si->sign)) {
    01786       HandleClickOnSign(si);
    01787       return true;
    01788     }
    01789   }
    01790
    01791   return false;
    01792 }
    01793
    01794
    01795 static bool CheckClickOnLandscape(const ViewPort *vp, int x, int y)
    01796 {
    01797   Point pt = TranslateXYToTileCoord(vp, x, y);
    01798
    01799   if (pt.x != -1) return ClickTile(TileVirtXY(pt.x, pt.y));
    01800   return true;
    01801 }
    01802
    01803
    01804 bool HandleViewportClicked(const ViewPort *vp, int x, int y)
    01805 {
    01806   const Vehicle *v;
    01807
    01808   if (CheckClickOnTown(vp, x, y)) return true;
    01809   if (CheckClickOnStation(vp, x, y)) return true;
    01810   if (CheckClickOnSign(vp, x, y)) return true;
    01811   CheckClickOnLandscape(vp, x, y);
    01812
    01813   v = CheckClickOnVehicle(vp, x, y);
    01814   if (v != NULL) {
    01815     DEBUG(misc, 2, "Vehicle %d (index %d) at %p", v->unitnumber, v->index, v);
    01816     if (IsCompanyBuildableVehicleType(v)) ShowVehicleViewWindow(v->First());
    01817     return true;
    01818   }
    01819   return CheckClickOnLandscape(vp, x, y);
    01820 }
    01821
    01822 Vehicle *CheckMouseOverVehicle()
    01823 {
    01824   const Window *w;
    01825   const ViewPort *vp;
    01826
    01827   int x = _cursor.pos.x;
    01828   int y = _cursor.pos.y;
    01829
    01830   w = FindWindowFromPt(x, y);
    01831   if (w == NULL) return NULL;
    01832
    01833   vp = IsPtInWindowViewport(w, x, y);
    01834   return (vp != NULL) ? CheckClickOnVehicle(vp, x, y) : NULL;
    01835 }
    01836
    01837
    01838
    01839 void PlaceObject()
    01840 {
    01841   Point pt;
    01842   Window *w;
    01843
    01844   pt = GetTileBelowCursor();
    01845   if (pt.x == -1) return;
    01846
    01847   if (_thd.place_mode == HT_POINT) {
    01848     pt.x += 8;
    01849     pt.y += 8;
    01850   }
    01851
    01852   _tile_fract_coords.x = pt.x & TILE_UNIT_MASK;
    01853   _tile_fract_coords.y = pt.y & TILE_UNIT_MASK;
    01854
    01855   w = GetCallbackWnd();
    01856   if (w != NULL) w->OnPlaceObject(pt, TileVirtXY(pt.x, pt.y));
    01857 }
    01858
    01859
    01868 bool ScrollWindowTo(int x, int y, int z, Window *w, bool instant)
    01869 {
    01870   /* The slope cannot be acquired outside of the map, so make sure we are always within the map. */
    01871   if (z == -1) z = GetSlopeZ(Clamp(x, 0, MapSizeX() * TILE_SIZE - 1), Clamp(y, 0, MapSizeY() * TILE_SIZE - 1));
    01872
    01873   Point pt = MapXYZToViewport(w->viewport, x, y, z);
    01874   w->viewport->follow_vehicle = INVALID_VEHICLE;
    01875
    01876   if (w->viewport->dest_scrollpos_x == pt.x && w->viewport->dest_scrollpos_y == pt.y)
    01877     return false;
    01878
    01879   if (instant) {
    01880     w->viewport->scrollpos_x = pt.x;
    01881     w->viewport->scrollpos_y = pt.y;
    01882   }
    01883
    01884   w->viewport->dest_scrollpos_x = pt.x;
    01885   w->viewport->dest_scrollpos_y = pt.y;
    01886   return true;
    01887 }
    01888
    01889 bool ScrollMainWindowToTile(TileIndex tile, bool instant)
    01890 {
    01891   return ScrollMainWindowTo(TileX(tile) * TILE_SIZE + TILE_SIZE / 2, TileY(tile) * TILE_SIZE + TILE_SIZE / 2, -1, instant);
    01892 }
    01893
    01894 void SetRedErrorSquare(TileIndex tile)
    01895 {
    01896   TileIndex old;
    01897
    01898   old = _thd.redsq;
    01899   _thd.redsq = tile;
    01900
    01901   if (tile != old) {
    01902     if (tile != INVALID_TILE) MarkTileDirtyByTile(tile);
    01903     if (old  != INVALID_TILE) MarkTileDirtyByTile(old);
    01904   }
    01905 }
    01906
    01911 void SetTileSelectSize(int w, int h)
    01912 {
    01913   _thd.new_size.x = w * TILE_SIZE;
    01914   _thd.new_size.y = h * TILE_SIZE;
    01915   _thd.new_outersize.x = 0;
    01916   _thd.new_outersize.y = 0;
    01917 }
    01918
    01919 void SetTileSelectBigSize(int ox, int oy, int sx, int sy)
    01920 {
    01921   _thd.offs.x = ox * TILE_SIZE;
    01922   _thd.offs.y = oy * TILE_SIZE;
    01923   _thd.new_outersize.x = sx * TILE_SIZE;
    01924   _thd.new_outersize.y = sy * TILE_SIZE;
    01925 }
    01926
    01928 static HighLightStyle GetAutorailHT(int x, int y)
    01929 {
    01930   return HT_RAIL | _autorail_piece[x & TILE_UNIT_MASK][y & TILE_UNIT_MASK];
    01931 }
    01932
    01940 void UpdateTileSelection()
    01941 {
    01942   int x1;
    01943   int y1;
    01944
    01945   _thd.new_drawstyle = HT_NONE;
    01946
    01947   if (_thd.place_mode == HT_SPECIAL) {
    01948     x1 = _thd.selend.x;
    01949     y1 = _thd.selend.y;
    01950     if (x1 != -1) {
    01951       int x2 = _thd.selstart.x & ~TILE_UNIT_MASK;
    01952       int y2 = _thd.selstart.y & ~TILE_UNIT_MASK;
    01953       x1 &= ~TILE_UNIT_MASK;
    01954       y1 &= ~TILE_UNIT_MASK;
    01955
    01956       if (x1 >= x2) Swap(x1, x2);
    01957       if (y1 >= y2) Swap(y1, y2);
    01958       _thd.new_pos.x = x1;
    01959       _thd.new_pos.y = y1;
    01960       _thd.new_size.x = x2 - x1 + TILE_SIZE;
    01961       _thd.new_size.y = y2 - y1 + TILE_SIZE;
    01962       _thd.new_drawstyle = _thd.next_drawstyle;
    01963     }
    01964   } else if (_thd.place_mode != HT_NONE) {
    01965     Point pt = GetTileBelowCursor();
    01966     x1 = pt.x;
    01967     y1 = pt.y;
    01968     if (x1 != -1) {
    01969       switch (_thd.place_mode & HT_DRAG_MASK) {
    01970         case HT_RECT:
    01971           _thd.new_drawstyle = HT_RECT;
    01972           break;
    01973         case HT_POINT:
    01974           _thd.new_drawstyle = HT_POINT;
    01975           x1 += TILE_SIZE / 2;
    01976           y1 += TILE_SIZE / 2;
    01977           break;
    01978         case HT_RAIL:
    01979           /* Draw one highlighted tile in any direction */
    01980           _thd.new_drawstyle = GetAutorailHT(pt.x, pt.y);
    01981           break;
    01982         case HT_LINE:
    01983           switch (_thd.place_mode & HT_DIR_MASK) {
    01984             case HT_DIR_X: _thd.new_drawstyle = HT_LINE | HT_DIR_X; break;
    01985             case HT_DIR_Y: _thd.new_drawstyle = HT_LINE | HT_DIR_Y; break;
    01986
    01987             case HT_DIR_HU:
    01988             case HT_DIR_HL:
    01989               _thd.new_drawstyle = (pt.x & TILE_UNIT_MASK) + (pt.y & TILE_UNIT_MASK) <= TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
    01990               break;
    01991
    01992             case HT_DIR_VL:
    01993             case HT_DIR_VR:
    01994               _thd.new_drawstyle = (pt.x & TILE_UNIT_MASK) > (pt.y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    01995               break;
    01996
    01997             default: NOT_REACHED();
    01998           }
    01999           _thd.selstart.x = x1 & ~TILE_UNIT_MASK;
    02000           _thd.selstart.y = y1 & ~TILE_UNIT_MASK;
    02001           break;
    02002         default:
    02003           NOT_REACHED();
    02004           break;
    02005       }
    02006       _thd.new_pos.x = x1 & ~TILE_UNIT_MASK;
    02007       _thd.new_pos.y = y1 & ~TILE_UNIT_MASK;
    02008     }
    02009   }
    02010
    02011   /* redraw selection */
    02012   if (_thd.drawstyle != _thd.new_drawstyle ||
    02013       _thd.pos.x != _thd.new_pos.x || _thd.pos.y != _thd.new_pos.y ||
    02014       _thd.size.x != _thd.new_size.x || _thd.size.y != _thd.new_size.y ||
    02015       _thd.outersize.x != _thd.new_outersize.x ||
    02016       _thd.outersize.y != _thd.new_outersize.y) {
    02017     /* clear the old selection? */
    02018     if (_thd.drawstyle) SetSelectionTilesDirty();
    02019
    02020     _thd.drawstyle = _thd.new_drawstyle;
    02021     _thd.pos = _thd.new_pos;
    02022     _thd.size = _thd.new_size;
    02023     _thd.outersize = _thd.new_outersize;
    02024     _thd.dirty = 0xff;
    02025
    02026     /* draw the new selection? */
    02027     if (_thd.new_drawstyle) SetSelectionTilesDirty();
    02028   }
    02029 }
    02030
    02036 static inline void ShowMeasurementTooltips(StringID str, uint paramcount, const uint64 params[])
    02037 {
    02038   if (!_settings_client.gui.measure_tooltip) return;
    02039   GuiShowTooltips(str, paramcount, params, true);
    02040 }
    02041
    02043 void VpStartPlaceSizing(TileIndex tile, ViewportPlaceMethod method, ViewportDragDropSelectionProcess process)
    02044 {
    02045   _thd.select_method = method;
    02046   _thd.select_proc   = process;
    02047   _thd.selend.x = TileX(tile) * TILE_SIZE;
    02048   _thd.selstart.x = TileX(tile) * TILE_SIZE;
    02049   _thd.selend.y = TileY(tile) * TILE_SIZE;
    02050   _thd.selstart.y = TileY(tile) * TILE_SIZE;
    02051
    02052   /* Needed so several things (road, autoroad, bridges, ...) are placed correctly.
    02053    * In effect, placement starts from the centre of a tile
    02054    */
    02055   if (method == VPM_X_OR_Y || method == VPM_FIX_X || method == VPM_FIX_Y) {
    02056     _thd.selend.x += TILE_SIZE / 2;
    02057     _thd.selend.y += TILE_SIZE / 2;
    02058     _thd.selstart.x += TILE_SIZE / 2;
    02059     _thd.selstart.y += TILE_SIZE / 2;
    02060   }
    02061
    02062   if (_thd.place_mode == HT_RECT) {
    02063     _thd.place_mode = HT_SPECIAL;
    02064     _thd.next_drawstyle = HT_RECT;
    02065   } else if (_thd.place_mode & (HT_RAIL | HT_LINE)) {
    02066     _thd.place_mode = HT_SPECIAL;
    02067     _thd.next_drawstyle = _thd.drawstyle;
    02068   } else {
    02069     _thd.place_mode = HT_SPECIAL;
    02070     _thd.next_drawstyle = HT_POINT;
    02071   }
    02072   _special_mouse_mode = WSM_SIZING;
    02073 }
    02074
    02075 void VpSetPlaceSizingLimit(int limit)
    02076 {
    02077   _thd.sizelimit = limit;
    02078 }
    02079
    02084 void VpSetPresizeRange(TileIndex from, TileIndex to)
    02085 {
    02086   uint64 distance = DistanceManhattan(from, to) + 1;
    02087
    02088   _thd.selend.x = TileX(to) * TILE_SIZE;
    02089   _thd.selend.y = TileY(to) * TILE_SIZE;
    02090   _thd.selstart.x = TileX(from) * TILE_SIZE;
    02091   _thd.selstart.y = TileY(from) * TILE_SIZE;
    02092   _thd.next_drawstyle = HT_RECT;
    02093
    02094   /* show measurement only if there is any length to speak of */
    02095   if (distance > 1) ShowMeasurementTooltips(STR_MEASURE_LENGTH, 1, &distance);
    02096 }
    02097
    02098 static void VpStartPreSizing()
    02099 {
    02100   _thd.selend.x = -1;
    02101   _special_mouse_mode = WSM_PRESIZE;
    02102 }
    02103
    02106 static HighLightStyle Check2x1AutoRail(int mode)
    02107 {
    02108   int fxpy = _tile_fract_coords.x + _tile_fract_coords.y;
    02109   int sxpy = (_thd.selend.x & TILE_UNIT_MASK) + (_thd.selend.y & TILE_UNIT_MASK);
    02110   int fxmy = _tile_fract_coords.x - _tile_fract_coords.y;
    02111   int sxmy = (_thd.selend.x & TILE_UNIT_MASK) - (_thd.selend.y & TILE_UNIT_MASK);
    02112
    02113   switch (mode) {
    02114     default: NOT_REACHED();
    02115     case 0: // end piece is lower right
    02116       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
    02117       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
    02118       return HT_DIR_Y;
    02119
    02120     case 1:
    02121       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
    02122       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
    02123       return HT_DIR_Y;
    02124
    02125     case 2:
    02126       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
    02127       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
    02128       return HT_DIR_X;
    02129
    02130     case 3:
    02131       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
    02132       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
    02133       return HT_DIR_X;
    02134   }
    02135 }
    02136
    02148 static bool SwapDirection(HighLightStyle style, TileIndex start_tile, TileIndex end_tile)
    02149 {
    02150   uint start_x = TileX(start_tile);
    02151   uint start_y = TileY(start_tile);
    02152   uint end_x = TileX(end_tile);
    02153   uint end_y = TileY(end_tile);
    02154
    02155   switch (style & HT_DRAG_MASK) {
    02156     case HT_RAIL:
    02157     case HT_LINE: return (end_x > start_x || (end_x == start_x && end_y > start_y));
    02158
    02159     case HT_RECT:
    02160     case HT_POINT: return (end_x != start_x && end_y < start_y);
    02161     default: NOT_REACHED();
    02162   }
    02163
    02164   return false;
    02165 }
    02166
    02181 static int CalcHeightdiff(HighLightStyle style, uint distance, TileIndex start_tile, TileIndex end_tile)
    02182 {
    02183   bool swap = SwapDirection(style, start_tile, end_tile);
    02184   byte style_t;
    02185   uint h0, h1, ht; // start heigth, end height, and temp variable
    02186
    02187   if (start_tile == end_tile) return 0;
    02188   if (swap) Swap(start_tile, end_tile);
    02189
    02190   switch (style & HT_DRAG_MASK) {
    02191     case HT_RECT: {
    02192       static const TileIndexDiffC heightdiff_area_by_dir[] = {
    02193         /* Start */ {1, 0}, /* Dragging east */ {0, 0}, // Dragging south
    02194         /* End   */ {0, 1}, /* Dragging east */ {1, 1}  // Dragging south
    02195       };
    02196
    02197       /* In the case of an area we can determine whether we were dragging south or
    02198        * east by checking the X-coordinates of the tiles */
    02199       style_t = (byte)(TileX(end_tile) > TileX(start_tile));
    02200       start_tile = TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_area_by_dir[style_t]));
    02201       end_tile   = TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_area_by_dir[2 + style_t]));
    02202     }
    02203     /* Fallthrough */
    02204     case HT_POINT:
    02205       h0 = TileHeight(start_tile);
    02206       h1 = TileHeight(end_tile);
    02207       break;
    02208     default: { // All other types, this is mostly only line/autorail
    02209       static const HighLightStyle flip_style_direction[] = {
    02210         HT_DIR_X, HT_DIR_Y, HT_DIR_HL, HT_DIR_HU, HT_DIR_VR, HT_DIR_VL
    02211       };
    02212       static const TileIndexDiffC heightdiff_line_by_dir[] = {
    02213         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_X  */ {0, 1}, {1, 1}, // HT_DIR_Y
    02214         /* Start */ {1, 0}, {0, 0}, /* HT_DIR_HU */ {1, 0}, {1, 1}, // HT_DIR_HL
    02215         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_VL */ {0, 1}, {1, 1}, // HT_DIR_VR
    02216
    02217         /* Start */ {0, 1}, {0, 0}, /* HT_DIR_X  */ {1, 0}, {0, 0}, // HT_DIR_Y
    02218         /* End   */ {0, 1}, {0, 0}, /* HT_DIR_HU */ {1, 1}, {0, 1}, // HT_DIR_HL
    02219         /* End   */ {1, 0}, {0, 0}, /* HT_DIR_VL */ {0, 0}, {0, 1}, // HT_DIR_VR
    02220       };
    02221
    02222       distance %= 2; // we're only interested if the distance is even or uneven
    02223       style &= HT_DIR_MASK;
    02224
    02225       /* To handle autorail, we do some magic to be able to use a lookup table.
    02226        * Firstly if we drag the other way around, we switch start&end, and if needed
    02227        * also flip the drag-position. Eg if it was on the left, and the distance is even
    02228        * that means the end, which is now the start is on the right */
    02229       if (swap && distance == 0) style = flip_style_direction[style];
    02230
    02231       /* Use lookup table for start-tile based on HighLightStyle direction */
    02232       style_t = style * 2;
    02233       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
    02234       h0 = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t])));
    02235       ht = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t + 1])));
    02236       h0 = max(h0, ht);
    02237
    02238       /* Use lookup table for end-tile based on HighLightStyle direction
    02239        * flip around side (lower/upper, left/right) based on distance */
    02240       if (distance == 0) style_t = flip_style_direction[style] * 2;
    02241       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
    02242       h1 = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t])));
    02243       ht = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t + 1])));
    02244       h1 = max(h1, ht);
    02245     } break;
    02246   }
    02247
    02248   if (swap) Swap(h0, h1);
    02249   /* Minimap shows height in intervals of 50 meters, let's do the same */
    02250   return (int)(h1 - h0) * 50;
    02251 }
    02252
    02253 static const StringID measure_strings_length[] = {STR_NULL, STR_MEASURE_LENGTH, STR_MEASURE_LENGTH_HEIGHTDIFF};
    02254
    02261 static void CheckUnderflow(int &test, int &other, int mult)
    02262 {
    02263   if (test >= 0) return;
    02264
    02265   other += mult * test;
    02266   test = 0;
    02267 }
    02268
    02276 static void CheckOverflow(int &test, int &other, int max, int mult)
    02277 {
    02278   if (test <= max) return;
    02279
    02280   other += mult * (test - max);
    02281   test = max;
    02282 }
    02283
    02285 static void CalcRaildirsDrawstyle(TileHighlightData *thd, int x, int y, int method)
    02286 {
    02287   HighLightStyle b;
    02288
    02289   int dx = thd->selstart.x - (thd->selend.x & ~TILE_UNIT_MASK);
    02290   int dy = thd->selstart.y - (thd->selend.y & ~TILE_UNIT_MASK);
    02291   uint w = abs(dx) + TILE_SIZE;
    02292   uint h = abs(dy) + TILE_SIZE;
    02293
    02294   if (method & ~(VPM_RAILDIRS | VPM_SIGNALDIRS)) {
    02295     /* We 'force' a selection direction; first four rail buttons. */
    02296     method &= ~(VPM_RAILDIRS | VPM_SIGNALDIRS);
    02297     int raw_dx = thd->selstart.x - thd->selend.x;
    02298     int raw_dy = thd->selstart.y - thd->selend.y;
    02299     switch (method) {
    02300       case VPM_FIX_X:
    02301         b = HT_LINE | HT_DIR_Y;
    02302         x = thd->selstart.x;
    02303         break;
    02304
    02305       case VPM_FIX_Y:
    02306         b = HT_LINE | HT_DIR_X;
    02307         y = thd->selstart.y;
    02308         break;
    02309
    02310       case VPM_FIX_HORIZONTAL:
    02311         if (dx == -dy) {
    02312           /* We are on a straight horizontal line. Determine the 'rail'
    02313            * to build based the sub tile location. */
    02314           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
    02315         } else {
    02316           /* We are not on a straight line. Determine the rail to build
    02317            * based on whether we are above or below it. */
    02318           b = dx + dy >= TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
    02319
    02320           /* Calculate where a horizontal line through the start point and
    02321            * a vertical line from the selected end point intersect and
    02322            * use that point as the end point. */
    02323           int offset = (raw_dx - raw_dy) / 2;
    02324           x = thd->selstart.x - (offset & ~TILE_UNIT_MASK);
    02325           y = thd->selstart.y + (offset & ~TILE_UNIT_MASK);
    02326
    02327           /* 'Build' the last half rail tile if needed */
    02328           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
    02329             if (dx + dy >= TILE_SIZE) {
    02330               x += (dx + dy < 0) ? TILE_SIZE : -TILE_SIZE;
    02331             } else {
    02332               y += (dx + dy < 0) ? TILE_SIZE : -TILE_SIZE;
    02333             }
    02334           }
    02335
    02336           /* Make sure we do not overflow the map! */
    02337           CheckUnderflow(x, y, 1);
    02338           CheckUnderflow(y, x, 1);
    02339           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, 1);
    02340           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, 1);
    02341           assert(x >= 0 && y >= 0 && x <= (int)MapMaxX() * TILE_SIZE && y <= (int)MapMaxY() * TILE_SIZE);
    02342         }
    02343         break;
    02344
    02345       case VPM_FIX_VERTICAL:
    02346         if (dx == dy) {
    02347           /* We are on a straight vertical line. Determine the 'rail'
    02348            * to build based the sub tile location. */
    02349           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02350         } else {
    02351           /* We are not on a straight line. Determine the rail to build
    02352            * based on whether we are left or right from it. */
    02353           b = dx < dy ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02354
    02355           /* Calculate where a vertical line through the start point and
    02356            * a horizontal line from the selected end point intersect and
    02357            * use that point as the end point. */
    02358           int offset = (raw_dx + raw_dy + TILE_SIZE) / 2;
    02359           x = thd->selstart.x - (offset & ~TILE_UNIT_MASK);
    02360           y = thd->selstart.y - (offset & ~TILE_UNIT_MASK);
    02361
    02362           /* 'Build' the last half rail tile if needed */
    02363           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
    02364             if (dx - dy < 0) {
    02365               y += (dx > dy) ? TILE_SIZE : -TILE_SIZE;
    02366             } else {
    02367               x += (dx < dy) ? TILE_SIZE : -TILE_SIZE;
    02368             }
    02369           }
    02370
    02371           /* Make sure we do not overflow the map! */
    02372           CheckUnderflow(x, y, -1);
    02373           CheckUnderflow(y, x, -1);
    02374           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, -1);
    02375           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, -1);
    02376           assert(x >= 0 && y >= 0 && x <= (int)MapMaxX() * TILE_SIZE && y <= (int)MapMaxY() * TILE_SIZE);
    02377         }
    02378         break;
    02379
    02380       default:
    02381         NOT_REACHED();
    02382     }
    02383   } else if (TileVirtXY(thd->selstart.x, thd->selstart.y) == TileVirtXY(x, y)) { // check if we're only within one tile
    02384     if (method & VPM_RAILDIRS) {
    02385       b = GetAutorailHT(x, y);
    02386     } else { // rect for autosignals on one tile
    02387       b = HT_RECT;
    02388     }
    02389   } else if (h == TILE_SIZE) { // Is this in X direction?
    02390     if (dx == TILE_SIZE) { // 2x1 special handling
    02391       b = (Check2x1AutoRail(3)) | HT_LINE;
    02392     } else if (dx == -TILE_SIZE) {
    02393       b = (Check2x1AutoRail(2)) | HT_LINE;
    02394     } else {
    02395       b = HT_LINE | HT_DIR_X;
    02396     }
    02397     y = thd->selstart.y;
    02398   } else if (w == TILE_SIZE) { // Or Y direction?
    02399     if (dy == TILE_SIZE) { // 2x1 special handling
    02400       b = (Check2x1AutoRail(1)) | HT_LINE;
    02401     } else if (dy == -TILE_SIZE) { // 2x1 other direction
    02402       b = (Check2x1AutoRail(0)) | HT_LINE;
    02403     } else {
    02404       b = HT_LINE | HT_DIR_Y;
    02405     }
    02406     x = thd->selstart.x;
    02407   } else if (w > h * 2) { // still count as x dir?
    02408     b = HT_LINE | HT_DIR_X;
    02409     y = thd->selstart.y;
    02410   } else if (h > w * 2) { // still count as y dir?
    02411     b = HT_LINE | HT_DIR_Y;
    02412     x = thd->selstart.x;
    02413   } else { // complicated direction
    02414     int d = w - h;
    02415     thd->selend.x = thd->selend.x & ~TILE_UNIT_MASK;
    02416     thd->selend.y = thd->selend.y & ~TILE_UNIT_MASK;
    02417
    02418     /* four cases. */
    02419     if (x > thd->selstart.x) {
    02420       if (y > thd->selstart.y) {
    02421         /* south */
    02422         if (d == 0) {
    02423           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02424         } else if (d >= 0) {
    02425           x = thd->selstart.x + h;
    02426           b = HT_LINE | HT_DIR_VL;
    02427         } else {
    02428           y = thd->selstart.y + w;
    02429           b = HT_LINE | HT_DIR_VR;
    02430         }
    02431       } else {
    02432         /* west */
    02433         if (d == 0) {
    02434           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
    02435         } else if (d >= 0) {
    02436           x = thd->selstart.x + h;
    02437           b = HT_LINE | HT_DIR_HL;
    02438         } else {
    02439           y = thd->selstart.y - w;
    02440           b = HT_LINE | HT_DIR_HU;
    02441         }
    02442       }
    02443     } else {
    02444       if (y > thd->selstart.y) {
    02445         /* east */
    02446         if (d == 0) {
    02447           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
    02448         } else if (d >= 0) {
    02449           x = thd->selstart.x - h;
    02450           b = HT_LINE | HT_DIR_HU;
    02451         } else {
    02452           y = thd->selstart.y + w;
    02453           b = HT_LINE | HT_DIR_HL;
    02454         }
    02455       } else {
    02456         /* north */
    02457         if (d == 0) {
    02458           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02459         } else if (d >= 0) {
    02460           x = thd->selstart.x - h;
    02461           b = HT_LINE | HT_DIR_VR;
    02462         } else {
    02463           y = thd->selstart.y - w;
    02464           b = HT_LINE | HT_DIR_VL;
    02465         }
    02466       }
    02467     }
    02468   }
    02469
    02470   if (_settings_client.gui.measure_tooltip) {
    02471     TileIndex t0 = TileVirtXY(thd->selstart.x, thd->selstart.y);
    02472     TileIndex t1 = TileVirtXY(x, y);
    02473     uint distance = DistanceManhattan(t0, t1) + 1;
    02474     byte index = 0;
    02475     uint64 params[2];
    02476
    02477     if (distance != 1) {
    02478       int heightdiff = CalcHeightdiff(b, distance, t0, t1);
    02479       /* If we are showing a tooltip for horizontal or vertical drags,
    02480        * 2 tiles have a length of 1. To bias towards the ceiling we add
    02481        * one before division. It feels more natural to count 3 lengths as 2 */
    02482       if ((b & HT_DIR_MASK) != HT_DIR_X && (b & HT_DIR_MASK) != HT_DIR_Y) {
    02483         distance = (distance + 1) / 2;
    02484       }
    02485
    02486       params[index++] = distance;
    02487       if (heightdiff != 0) params[index++] = heightdiff;
    02488     }
    02489
    02490     ShowMeasurementTooltips(measure_strings_length[index], index, params);
    02491   }
    02492
    02493   thd->selend.x = x;
    02494   thd->selend.y = y;
    02495   thd->next_drawstyle = b;
    02496 }
    02497
    02504 void VpSelectTilesWithMethod(int x, int y, ViewportPlaceMethod method)
    02505 {
    02506   int sx, sy;
    02507   HighLightStyle style;
    02508
    02509   if (x == -1) {
    02510     _thd.selend.x = -1;
    02511     return;
    02512   }
    02513
    02514   /* Special handling of drag in any (8-way) direction */
    02515   if (method & (VPM_RAILDIRS | VPM_SIGNALDIRS)) {
    02516     _thd.selend.x = x;
    02517     _thd.selend.y = y;
    02518     CalcRaildirsDrawstyle(&_thd, x, y, method);
    02519     return;
    02520   }
    02521
    02522   /* Needed so level-land is placed correctly */
    02523   if (_thd.next_drawstyle == HT_POINT) {
    02524     x += TILE_SIZE / 2;
    02525     y += TILE_SIZE / 2;
    02526   }
    02527
    02528   sx = _thd.selstart.x;
    02529   sy = _thd.selstart.y;
    02530
    02531   switch (method) {
    02532     case VPM_X_OR_Y: // drag in X or Y direction
    02533       if (abs(sy - y) < abs(sx - x)) {
    02534         y = sy;
    02535         style = HT_DIR_X;
    02536       } else {
    02537         x = sx;
    02538         style = HT_DIR_Y;
    02539       }
    02540       goto calc_heightdiff_single_direction;
    02541     case VPM_FIX_X: // drag in Y direction
    02542       x = sx;
    02543       style = HT_DIR_Y;
    02544       goto calc_heightdiff_single_direction;
    02545     case VPM_FIX_Y: // drag in X direction
    02546       y = sy;
    02547       style = HT_DIR_X;
    02548
    02549 calc_heightdiff_single_direction:;
    02550       if (_settings_client.gui.measure_tooltip) {
    02551         TileIndex t0 = TileVirtXY(sx, sy);
    02552         TileIndex t1 = TileVirtXY(x, y);
    02553         uint distance = DistanceManhattan(t0, t1) + 1;
    02554         byte index = 0;
    02555         uint64 params[2];
    02556
    02557         if (distance != 1) {
    02558           /* With current code passing a HT_LINE style to calculate the height
    02559            * difference is enough. However if/when a point-tool is created
    02560            * with this method, function should be called with new_style (below)
    02561            * instead of HT_LINE | style case HT_POINT is handled specially
    02562            * new_style := (_thd.next_drawstyle & HT_RECT) ? HT_LINE | style : _thd.next_drawstyle; */
    02563           int heightdiff = CalcHeightdiff(HT_LINE | style, 0, t0, t1);
    02564
    02565           params[index++] = distance;
    02566           if (heightdiff != 0) params[index++] = heightdiff;
    02567         }
    02568
    02569         ShowMeasurementTooltips(measure_strings_length[index], index, params);
    02570       } break;
    02571
    02572     case VPM_X_AND_Y_LIMITED: { // drag an X by Y constrained rect area
    02573       int limit = (_thd.sizelimit - 1) * TILE_SIZE;
    02574       x = sx + Clamp(x - sx, -limit, limit);
    02575       y = sy + Clamp(y - sy, -limit, limit);
    02576       } // Fallthrough
    02577     case VPM_X_AND_Y: { // drag an X by Y area
    02578       if (_settings_client.gui.measure_tooltip) {
    02579         static const StringID measure_strings_area[] = {
    02580           STR_NULL, STR_NULL, STR_MEASURE_AREA, STR_MEASURE_AREA_HEIGHTDIFF
    02581         };
    02582
    02583         TileIndex t0 = TileVirtXY(sx, sy);
    02584         TileIndex t1 = TileVirtXY(x, y);
    02585         uint dx = Delta(TileX(t0), TileX(t1)) + 1;
    02586         uint dy = Delta(TileY(t0), TileY(t1)) + 1;
    02587         byte index = 0;
    02588         uint64 params[3];
    02589
    02590         /* If dragging an area (eg dynamite tool) and it is actually a single
    02591          * row/column, change the type to 'line' to get proper calculation for height */
    02592         style = (HighLightStyle)_thd.next_drawstyle;
    02593         if (style & HT_RECT) {
    02594           if (dx == 1) {
    02595             style = HT_LINE | HT_DIR_Y;
    02596           } else if (dy == 1) {
    02597             style = HT_LINE | HT_DIR_X;
    02598           }
    02599         }
    02600
    02601         if (dx != 1 || dy != 1) {
    02602           int heightdiff = CalcHeightdiff(style, 0, t0, t1);
    02603
    02604           params[index++] = dx;
    02605           params[index++] = dy;
    02606           if (heightdiff != 0) params[index++] = heightdiff;
    02607         }
    02608
    02609         ShowMeasurementTooltips(measure_strings_area[index], index, params);
    02610       }
    02611     break;
    02612
    02613     }
    02614     default: NOT_REACHED();
    02615   }
    02616
    02617   _thd.selend.x = x;
    02618   _thd.selend.y = y;
    02619 }
    02620
    02625 bool VpHandlePlaceSizingDrag()
    02626 {
    02627   if (_special_mouse_mode != WSM_SIZING) return true;
    02628
    02629   /* stop drag mode if the window has been closed */
    02630   Window *w = FindWindowById(_thd.window_class, _thd.window_number);
    02631   if (w == NULL) {
    02632     ResetObjectToPlace();
    02633     return false;
    02634   }
    02635
    02636   /* while dragging execute the drag procedure of the corresponding window (mostly VpSelectTilesWithMethod() ) */
    02637   if (_left_button_down) {
    02638     w->OnPlaceDrag(_thd.select_method, _thd.select_proc, GetTileBelowCursor());
    02639     return false;
    02640   }
    02641
    02642   /* mouse button released..
    02643    * keep the selected tool, but reset it to the original mode. */
    02644   _special_mouse_mode = WSM_NONE;
    02645   if (_thd.next_drawstyle == HT_RECT) {
    02646     _thd.place_mode = HT_RECT;
    02647   } else if (_thd.select_method & VPM_SIGNALDIRS) {
    02648     _thd.place_mode = HT_RECT;
    02649   } else if (_thd.select_method & VPM_RAILDIRS) {
    02650     _thd.place_mode = (_thd.select_method & ~VPM_RAILDIRS) ? _thd.next_drawstyle : HT_RAIL;
    02651   } else {
    02652     _thd.place_mode = HT_POINT;
    02653   }
    02654   SetTileSelectSize(1, 1);
    02655
    02656   w->OnPlaceMouseUp(_thd.select_method, _thd.select_proc, _thd.selend, TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y));
    02657
    02658   return false;
    02659 }
    02660
    02661 void SetObjectToPlaceWnd(CursorID icon, SpriteID pal, HighLightStyle mode, Window *w)
    02662 {
    02663   SetObjectToPlace(icon, pal, mode, w->window_class, w->window_number);
    02664 }
    02665
    02666 #include "table/animcursors.h"
    02667
    02668 void SetObjectToPlace(CursorID icon, SpriteID pal, HighLightStyle mode, WindowClass window_class, WindowNumber window_num)
    02669 {
    02670   /* undo clicking on button and drag & drop */
    02671   if (_thd.place_mode != HT_NONE || _special_mouse_mode == WSM_DRAGDROP) {
    02672     Window *w = FindWindowById(_thd.window_class, _thd.window_number);
    02673     if (w != NULL) {
    02674       /* Call the abort function, but set the window class to something
    02675        * that will never be used to avoid infinite loops. Setting it to
    02676        * the 'next' window class must not be done because recursion into
    02677        * this function might in some cases reset the newly set object to
    02678        * place or not properly reset the original selection. */
    02679       _thd.window_class = WC_INVALID;
    02680       w->OnPlaceObjectAbort();
    02681     }
    02682   }
    02683
    02684   SetTileSelectSize(1, 1);
    02685
    02686   _thd.make_square_red = false;
    02687
    02688   if (mode == HT_DRAG) { // HT_DRAG is for dragdropping trains in the depot window
    02689     mode = HT_NONE;
    02690     _special_mouse_mode = WSM_DRAGDROP;
    02691   } else {
    02692     _special_mouse_mode = WSM_NONE;
    02693   }
    02694
    02695   _thd.place_mode = mode;
    02696   _thd.window_class = window_class;
    02697   _thd.window_number = window_num;
    02698
    02699   if (mode == HT_SPECIAL) // special tools, like tunnels or docks start with presizing mode
    02700     VpStartPreSizing();
    02701
    02702   if ((int)icon < 0) {
    02703     SetAnimatedMouseCursor(_animcursors[~icon]);
    02704   } else {
    02705     SetMouseCursor(icon, pal);
    02706   }
    02707
    02708 }
    02709
    02710 void ResetObjectToPlace()
    02711 {
    02712   SetObjectToPlace(SPR_CURSOR_MOUSE, PAL_NONE, HT_NONE, WC_MAIN_WINDOW, 0);
    02713 }