# viewport.cpp

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    00001 /* $Id$ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
    00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
    00008  */
    00009
    00029 #include "stdafx.h"
    00030 #include "landscape.h"
    00031 #include "viewport_func.h"
    00032 #include "station_base.h"
    00033 #include "waypoint_base.h"
    00034 #include "town.h"
    00035 #include "signs_base.h"
    00036 #include "signs_func.h"
    00037 #include "vehicle_base.h"
    00038 #include "vehicle_gui.h"
    00039 #include "blitter/factory.hpp"
    00040 #include "strings_func.h"
    00041 #include "zoom_func.h"
    00042 #include "vehicle_func.h"
    00043 #include "company_func.h"
    00044 #include "waypoint_func.h"
    00045 #include "window_func.h"
    00046 #include "tilehighlight_func.h"
    00047 #include "window_gui.h"
    00048 #include "linkgraph_gui.h"
    00049
    00050 #include "table/strings.h"
    00051 #include "table/palettes.h"
    00052
    00053 Point _tile_fract_coords;
    00054
    00055 struct StringSpriteToDraw {
    00056   StringID string;
    00057   Colours colour;
    00058   int32 x;
    00059   int32 y;
    00060   uint64 params[2];
    00061   uint16 width;
    00062 };
    00063
    00064 struct TileSpriteToDraw {
    00065   SpriteID image;
    00066   PaletteID pal;
    00067   const SubSprite *sub;
    00068   int32 x;
    00069   int32 y;
    00070 };
    00071
    00072 struct ChildScreenSpriteToDraw {
    00073   SpriteID image;
    00074   PaletteID pal;
    00075   const SubSprite *sub;
    00076   int32 x;
    00077   int32 y;
    00078   int next;
    00079 };
    00080
    00082 struct ParentSpriteToDraw {
    00083   SpriteID image;
    00084   PaletteID pal;
    00085   const SubSprite *sub;
    00086
    00087   int32 x;
    00088   int32 y;
    00089
    00090   int32 left;
    00091   int32 top;
    00092
    00093   int32 xmin;
    00094   int32 xmax;
    00095   int32 ymin;
    00096   int32 ymax;
    00097   int zmin;
    00098   int zmax;
    00099
    00100   int first_child;
    00101   bool comparison_done;
    00102 };
    00103
    00105 enum FoundationPart {
    00106   FOUNDATION_PART_NONE     = 0xFF,
    00107   FOUNDATION_PART_NORMAL   = 0,
    00108   FOUNDATION_PART_HALFTILE = 1,
    00109   FOUNDATION_PART_END
    00110 };
    00111
    00116 enum SpriteCombineMode {
    00117   SPRITE_COMBINE_NONE,
    00118   SPRITE_COMBINE_PENDING,
    00119   SPRITE_COMBINE_ACTIVE,
    00120 };
    00121
    00122 typedef SmallVector<TileSpriteToDraw, 64> TileSpriteToDrawVector;
    00123 typedef SmallVector<StringSpriteToDraw, 4> StringSpriteToDrawVector;
    00124 typedef SmallVector<ParentSpriteToDraw, 64> ParentSpriteToDrawVector;
    00125 typedef SmallVector<ParentSpriteToDraw*, 64> ParentSpriteToSortVector;
    00126 typedef SmallVector<ChildScreenSpriteToDraw, 16> ChildScreenSpriteToDrawVector;
    00127
    00129 struct ViewportDrawer {
    00130   DrawPixelInfo dpi;
    00131
    00132   StringSpriteToDrawVector string_sprites_to_draw;
    00133   TileSpriteToDrawVector tile_sprites_to_draw;
    00134   ParentSpriteToDrawVector parent_sprites_to_draw;
    00135   ParentSpriteToSortVector parent_sprites_to_sort;
    00136   ChildScreenSpriteToDrawVector child_screen_sprites_to_draw;
    00137
    00138   int *last_child;
    00139
    00140   SpriteCombineMode combine_sprites;
    00141
    00142   int foundation[FOUNDATION_PART_END];
    00143   FoundationPart foundation_part;
    00144   int *last_foundation_child[FOUNDATION_PART_END];
    00145   Point foundation_offset[FOUNDATION_PART_END];
    00146 };
    00147
    00148 static void MarkViewportDirty(const ViewPort *vp, int left, int top, int right, int bottom);
    00149
    00150 static ViewportDrawer _vd;
    00151
    00152 TileHighlightData _thd;
    00153 static TileInfo *_cur_ti;
    00154 bool _draw_bounding_boxes = false;
    00155 bool _draw_dirty_blocks = false;
    00156 uint _dirty_block_colour = 0;
    00157
    00158 static Point MapXYZToViewport(const ViewPort *vp, int x, int y, int z)
    00159 {
    00160   Point p = RemapCoords(x, y, z);
    00161   p.x -= vp->virtual_width / 2;
    00162   p.y -= vp->virtual_height / 2;
    00163   return p;
    00164 }
    00165
    00166 void DeleteWindowViewport(Window *w)
    00167 {
    00168   free(w->viewport);
    00169   w->viewport = NULL;
    00170 }
    00171
    00184 void InitializeWindowViewport(Window *w, int x, int y,
    00185   int width, int height, uint32 follow_flags, ZoomLevel zoom)
    00186 {
    00187   assert(w->viewport == NULL);
    00188
    00189   ViewportData *vp = CallocT<ViewportData>(1);
    00190
    00191   vp->left = x + w->left;
    00192   vp->top = y + w->top;
    00193   vp->width = width;
    00194   vp->height = height;
    00195
    00196   vp->zoom = static_cast<ZoomLevel>(Clamp(zoom, _settings_client.gui.zoom_min, _settings_client.gui.zoom_max));
    00197
    00198   vp->virtual_width = ScaleByZoom(width, zoom);
    00199   vp->virtual_height = ScaleByZoom(height, zoom);
    00200
    00201   Point pt;
    00202
    00203   if (follow_flags & 0x80000000) {
    00204     const Vehicle *veh;
    00205
    00206     vp->follow_vehicle = (VehicleID)(follow_flags & 0xFFFFF);
    00207     veh = Vehicle::Get(vp->follow_vehicle);
    00208     pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
    00209   } else {
    00210     uint x = TileX(follow_flags) * TILE_SIZE;
    00211     uint y = TileY(follow_flags) * TILE_SIZE;
    00212
    00213     vp->follow_vehicle = INVALID_VEHICLE;
    00214     pt = MapXYZToViewport(vp, x, y, GetSlopePixelZ(x, y));
    00215   }
    00216
    00217   vp->scrollpos_x = pt.x;
    00218   vp->scrollpos_y = pt.y;
    00219   vp->dest_scrollpos_x = pt.x;
    00220   vp->dest_scrollpos_y = pt.y;
    00221
    00222   vp->overlay = NULL;
    00223
    00224   w->viewport = vp;
    00225   vp->virtual_left = 0;//pt.x;
    00226   vp->virtual_top = 0;//pt.y;
    00227 }
    00228
    00229 static Point _vp_move_offs;
    00230
    00231 static void DoSetViewportPosition(const Window *w, int left, int top, int width, int height)
    00232 {
    00233   FOR_ALL_WINDOWS_FROM_BACK_FROM(w, w) {
    00234     if (left + width > w->left &&
    00235         w->left + w->width > left &&
    00236         top + height > w->top &&
    00237         w->top + w->height > top) {
    00238
    00239       if (left < w->left) {
    00240         DoSetViewportPosition(w, left, top, w->left - left, height);
    00241         DoSetViewportPosition(w, left + (w->left - left), top, width - (w->left - left), height);
    00242         return;
    00243       }
    00244
    00245       if (left + width > w->left + w->width) {
    00246         DoSetViewportPosition(w, left, top, (w->left + w->width - left), height);
    00247         DoSetViewportPosition(w, left + (w->left + w->width - left), top, width - (w->left + w->width - left), height);
    00248         return;
    00249       }
    00250
    00251       if (top < w->top) {
    00252         DoSetViewportPosition(w, left, top, width, (w->top - top));
    00253         DoSetViewportPosition(w, left, top + (w->top - top), width, height - (w->top - top));
    00254         return;
    00255       }
    00256
    00257       if (top + height > w->top + w->height) {
    00258         DoSetViewportPosition(w, left, top, width, (w->top + w->height - top));
    00259         DoSetViewportPosition(w, left, top + (w->top + w->height - top), width, height - (w->top + w->height - top));
    00260         return;
    00261       }
    00262
    00263       return;
    00264     }
    00265   }
    00266
    00267   {
    00268     int xo = _vp_move_offs.x;
    00269     int yo = _vp_move_offs.y;
    00270
    00271     if (abs(xo) >= width || abs(yo) >= height) {
    00272       /* fully_outside */
    00273       RedrawScreenRect(left, top, left + width, top + height);
    00274       return;
    00275     }
    00276
    00277     GfxScroll(left, top, width, height, xo, yo);
    00278
    00279     if (xo > 0) {
    00280       RedrawScreenRect(left, top, xo + left, top + height);
    00281       left += xo;
    00282       width -= xo;
    00283     } else if (xo < 0) {
    00284       RedrawScreenRect(left + width + xo, top, left + width, top + height);
    00285       width += xo;
    00286     }
    00287
    00288     if (yo > 0) {
    00289       RedrawScreenRect(left, top, width + left, top + yo);
    00290     } else if (yo < 0) {
    00291       RedrawScreenRect(left, top + height + yo, width + left, top + height);
    00292     }
    00293   }
    00294 }
    00295
    00296 static void SetViewportPosition(Window *w, int x, int y)
    00297 {
    00298   ViewPort *vp = w->viewport;
    00299   int old_left = vp->virtual_left;
    00300   int old_top = vp->virtual_top;
    00301   int i;
    00302   int left, top, width, height;
    00303
    00304   vp->virtual_left = x;
    00305   vp->virtual_top = y;
    00306
    00307   /* Viewport is bound to its left top corner, so it must be rounded down (UnScaleByZoomLower)
    00308    * else glitch described in FS#1412 will happen (offset by 1 pixel with zoom level > NORMAL)
    00309    */
    00310   old_left = UnScaleByZoomLower(old_left, vp->zoom);
    00311   old_top = UnScaleByZoomLower(old_top, vp->zoom);
    00312   x = UnScaleByZoomLower(x, vp->zoom);
    00313   y = UnScaleByZoomLower(y, vp->zoom);
    00314
    00315   old_left -= x;
    00316   old_top -= y;
    00317
    00318   if (old_top == 0 && old_left == 0) return;
    00319
    00320   _vp_move_offs.x = old_left;
    00321   _vp_move_offs.y = old_top;
    00322
    00323   left = vp->left;
    00324   top = vp->top;
    00325   width = vp->width;
    00326   height = vp->height;
    00327
    00328   if (left < 0) {
    00329     width += left;
    00330     left = 0;
    00331   }
    00332
    00333   i = left + width - _screen.width;
    00334   if (i >= 0) width -= i;
    00335
    00336   if (width > 0) {
    00337     if (top < 0) {
    00338       height += top;
    00339       top = 0;
    00340     }
    00341
    00342     i = top + height - _screen.height;
    00343     if (i >= 0) height -= i;
    00344
    00345     if (height > 0) DoSetViewportPosition(w->z_front, left, top, width, height);
    00346   }
    00347 }
    00348
    00357 ViewPort *IsPtInWindowViewport(const Window *w, int x, int y)
    00358 {
    00359   ViewPort *vp = w->viewport;
    00360
    00361   if (vp != NULL &&
    00362       IsInsideMM(x, vp->left, vp->left + vp->width) &&
    00363       IsInsideMM(y, vp->top, vp->top + vp->height))
    00364     return vp;
    00365
    00366   return NULL;
    00367 }
    00368
    00376 static Point TranslateXYToTileCoord(const ViewPort *vp, int x, int y)
    00377 {
    00378   Point pt;
    00379   int a, b;
    00380   int z;
    00381
    00382   if ( (uint)(x -= vp->left) >= (uint)vp->width ||
    00383         (uint)(y -= vp->top) >= (uint)vp->height) {
    00384         Point pt = {-1, -1};
    00385         return pt;
    00386   }
    00387
    00388   x = (ScaleByZoom(x, vp->zoom) + vp->virtual_left) >> (2 + ZOOM_LVL_SHIFT);
    00389   y = (ScaleByZoom(y, vp->zoom) + vp->virtual_top) >> (1 + ZOOM_LVL_SHIFT);
    00390
    00391   a = y - x;
    00392   b = y + x;
    00393
    00394   /* we need to move variables in to the valid range, as the
    00395    * GetTileZoomCenterWindow() function can call here with invalid x and/or y,
    00396    * when the user tries to zoom out along the sides of the map */
    00397   a = Clamp(a, -4 * (int)TILE_SIZE, (int)(MapMaxX() * TILE_SIZE) - 1);
    00398   b = Clamp(b, -4 * (int)TILE_SIZE, (int)(MapMaxY() * TILE_SIZE) - 1);
    00399
    00400   /* (a, b) is the X/Y-world coordinate that belongs to (x,y) if the landscape would be completely flat on height 0.
    00401    * Now find the Z-world coordinate by fix point iteration.
    00402    * This is a bit tricky because the tile height is non-continuous at foundations.
    00403    * The clicked point should be approached from the back, otherwise there are regions that are not clickable.
    00404    * (FOUNDATION_HALFTILE_LOWER on SLOPE_STEEP_S hides north halftile completely)
    00405    * So give it a z-malus of 4 in the first iterations.
    00406    */
    00407   z = 0;
    00408
    00409   int min_coord = _settings_game.construction.freeform_edges ? TILE_SIZE : 0;
    00410
    00411   for (int i = 0; i < 5; i++) z = GetSlopePixelZ(Clamp(a + max(z, 4) - 4, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + max(z, 4) - 4, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
    00412   for (int malus = 3; malus > 0; malus--) z = GetSlopePixelZ(Clamp(a + max(z, malus) - malus, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + max(z, malus) - malus, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
    00413   for (int i = 0; i < 5; i++) z = GetSlopePixelZ(Clamp(a + z, min_coord, MapMaxX() * TILE_SIZE - 1), Clamp(b + z, min_coord, MapMaxY() * TILE_SIZE - 1)) / 2;
    00414
    00415   pt.x = Clamp(a + z, min_coord, MapMaxX() * TILE_SIZE - 1);
    00416   pt.y = Clamp(b + z, min_coord, MapMaxY() * TILE_SIZE - 1);
    00417
    00418   return pt;
    00419 }
    00420
    00421 /* When used for zooming, check area below current coordinates (x,y)
    00422  * and return the tile of the zoomed out/in position (zoom_x, zoom_y)
    00423  * when you just want the tile, make x = zoom_x and y = zoom_y */
    00424 static Point GetTileFromScreenXY(int x, int y, int zoom_x, int zoom_y)
    00425 {
    00426   Window *w;
    00427   ViewPort *vp;
    00428   Point pt;
    00429
    00430   if ( (w = FindWindowFromPt(x, y)) != NULL &&
    00431        (vp = IsPtInWindowViewport(w, x, y)) != NULL)
    00432         return TranslateXYToTileCoord(vp, zoom_x, zoom_y);
    00433
    00434   pt.y = pt.x = -1;
    00435   return pt;
    00436 }
    00437
    00438 Point GetTileBelowCursor()
    00439 {
    00440   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, _cursor.pos.x, _cursor.pos.y);
    00441 }
    00442
    00443
    00444 Point GetTileZoomCenterWindow(bool in, Window * w)
    00445 {
    00446   int x, y;
    00447   ViewPort *vp = w->viewport;
    00448
    00449   if (in) {
    00450     x = ((_cursor.pos.x - vp->left) >> 1) + (vp->width >> 2);
    00451     y = ((_cursor.pos.y - vp->top) >> 1) + (vp->height >> 2);
    00452   } else {
    00453     x = vp->width - (_cursor.pos.x - vp->left);
    00454     y = vp->height - (_cursor.pos.y - vp->top);
    00455   }
    00456   /* Get the tile below the cursor and center on the zoomed-out center */
    00457   return GetTileFromScreenXY(_cursor.pos.x, _cursor.pos.y, x + vp->left, y + vp->top);
    00458 }
    00459
    00468 void HandleZoomMessage(Window *w, const ViewPort *vp, byte widget_zoom_in, byte widget_zoom_out)
    00469 {
    00470   w->SetWidgetDisabledState(widget_zoom_in, vp->zoom <= _settings_client.gui.zoom_min);
    00471   w->SetWidgetDirty(widget_zoom_in);
    00472
    00473   w->SetWidgetDisabledState(widget_zoom_out, vp->zoom >= _settings_client.gui.zoom_max);
    00474   w->SetWidgetDirty(widget_zoom_out);
    00475 }
    00476
    00489 static void AddTileSpriteToDraw(SpriteID image, PaletteID pal, int32 x, int32 y, int z, const SubSprite *sub = NULL, int extra_offs_x = 0, int extra_offs_y = 0)
    00490 {
    00491   assert((image & SPRITE_MASK) < MAX_SPRITES);
    00492
    00493   TileSpriteToDraw *ts = _vd.tile_sprites_to_draw.Append();
    00494   ts->image = image;
    00495   ts->pal = pal;
    00496   ts->sub = sub;
    00497   Point pt = RemapCoords(x, y, z);
    00498   ts->x = pt.x + extra_offs_x;
    00499   ts->y = pt.y + extra_offs_y;
    00500 }
    00501
    00514 static void AddChildSpriteToFoundation(SpriteID image, PaletteID pal, const SubSprite *sub, FoundationPart foundation_part, int extra_offs_x, int extra_offs_y)
    00515 {
    00516   assert(IsInsideMM(foundation_part, 0, FOUNDATION_PART_END));
    00517   assert(_vd.foundation[foundation_part] != -1);
    00518   Point offs = _vd.foundation_offset[foundation_part];
    00519
    00520   /* Change the active ChildSprite list to the one of the foundation */
    00521   int *old_child = _vd.last_child;
    00522   _vd.last_child = _vd.last_foundation_child[foundation_part];
    00523
    00524   AddChildSpriteScreen(image, pal, offs.x + extra_offs_x, offs.y + extra_offs_y, false, sub, false);
    00525
    00526   /* Switch back to last ChildSprite list */
    00527   _vd.last_child = old_child;
    00528 }
    00529
    00543 void DrawGroundSpriteAt(SpriteID image, PaletteID pal, int32 x, int32 y, int z, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
    00544 {
    00545   /* Switch to first foundation part, if no foundation was drawn */
    00546   if (_vd.foundation_part == FOUNDATION_PART_NONE) _vd.foundation_part = FOUNDATION_PART_NORMAL;
    00547
    00548   if (_vd.foundation[_vd.foundation_part] != -1) {
    00549     Point pt = RemapCoords(x, y, z);
    00550     AddChildSpriteToFoundation(image, pal, sub, _vd.foundation_part, pt.x + extra_offs_x * ZOOM_LVL_BASE, pt.y + extra_offs_y * ZOOM_LVL_BASE);
    00551   } else {
    00552     AddTileSpriteToDraw(image, pal, _cur_ti->x + x, _cur_ti->y + y, _cur_ti->z + z, sub, extra_offs_x * ZOOM_LVL_BASE, extra_offs_y * ZOOM_LVL_BASE);
    00553   }
    00554 }
    00555
    00566 void DrawGroundSprite(SpriteID image, PaletteID pal, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
    00567 {
    00568   DrawGroundSpriteAt(image, pal, 0, 0, 0, sub, extra_offs_x, extra_offs_y);
    00569 }
    00570
    00578 void OffsetGroundSprite(int x, int y)
    00579 {
    00580   /* Switch to next foundation part */
    00581   switch (_vd.foundation_part) {
    00582     case FOUNDATION_PART_NONE:
    00583       _vd.foundation_part = FOUNDATION_PART_NORMAL;
    00584       break;
    00585     case FOUNDATION_PART_NORMAL:
    00586       _vd.foundation_part = FOUNDATION_PART_HALFTILE;
    00587       break;
    00588     default: NOT_REACHED();
    00589   }
    00590
    00591   /* _vd.last_child == NULL if foundation sprite was clipped by the viewport bounds */
    00592   if (_vd.last_child != NULL) _vd.foundation[_vd.foundation_part] = _vd.parent_sprites_to_draw.Length() - 1;
    00593
    00594   _vd.foundation_offset[_vd.foundation_part].x = x * ZOOM_LVL_BASE;
    00595   _vd.foundation_offset[_vd.foundation_part].y = y * ZOOM_LVL_BASE;
    00596   _vd.last_foundation_child[_vd.foundation_part] = _vd.last_child;
    00597 }
    00598
    00610 static void AddCombinedSprite(SpriteID image, PaletteID pal, int x, int y, int z, const SubSprite *sub)
    00611 {
    00612   Point pt = RemapCoords(x, y, z);
    00613   const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
    00614
    00615   if (pt.x + spr->x_offs >= _vd.dpi.left + _vd.dpi.width ||
    00616       pt.x + spr->x_offs + spr->width <= _vd.dpi.left ||
    00617       pt.y + spr->y_offs >= _vd.dpi.top + _vd.dpi.height ||
    00618       pt.y + spr->y_offs + spr->height <= _vd.dpi.top)
    00619     return;
    00620
    00621   const ParentSpriteToDraw *pstd = _vd.parent_sprites_to_draw.End() - 1;
    00622   AddChildSpriteScreen(image, pal, pt.x - pstd->left, pt.y - pstd->top, false, sub, false);
    00623 }
    00624
    00650 void AddSortableSpriteToDraw(SpriteID image, PaletteID pal, int x, int y, int w, int h, int dz, int z, bool transparent, int bb_offset_x, int bb_offset_y, int bb_offset_z, const SubSprite *sub)
    00651 {
    00652   int32 left, right, top, bottom;
    00653
    00654   assert((image & SPRITE_MASK) < MAX_SPRITES);
    00655
    00656   /* make the sprites transparent with the right palette */
    00657   if (transparent) {
    00658     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
    00659     pal = PALETTE_TO_TRANSPARENT;
    00660   }
    00661
    00662   if (_vd.combine_sprites == SPRITE_COMBINE_ACTIVE) {
    00663     AddCombinedSprite(image, pal, x, y, z, sub);
    00664     return;
    00665   }
    00666
    00667   _vd.last_child = NULL;
    00668
    00669   Point pt = RemapCoords(x, y, z);
    00670   int tmp_left, tmp_top, tmp_x = pt.x, tmp_y = pt.y;
    00671
    00672   /* Compute screen extents of sprite */
    00673   if (image == SPR_EMPTY_BOUNDING_BOX) {
    00674     left = tmp_left = RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x;
    00675     right           = RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1;
    00676     top  = tmp_top  = RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y;
    00677     bottom          = RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1;
    00678   } else {
    00679     const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
    00680     left = tmp_left = (pt.x += spr->x_offs);
    00681     right           = (pt.x +  spr->width );
    00682     top  = tmp_top  = (pt.y += spr->y_offs);
    00683     bottom          = (pt.y +  spr->height);
    00684   }
    00685
    00686   if (_draw_bounding_boxes && (image != SPR_EMPTY_BOUNDING_BOX)) {
    00687     /* Compute maximal extents of sprite and its bounding box */
    00688     left   = min(left  , RemapCoords(x + w          , y + bb_offset_y, z + bb_offset_z).x);
    00689     right  = max(right , RemapCoords(x + bb_offset_x, y + h          , z + bb_offset_z).x + 1);
    00690     top    = min(top   , RemapCoords(x + bb_offset_x, y + bb_offset_y, z + dz         ).y);
    00691     bottom = max(bottom, RemapCoords(x + w          , y + h          , z + bb_offset_z).y + 1);
    00692   }
    00693
    00694   /* Do not add the sprite to the viewport, if it is outside */
    00695   if (left   >= _vd.dpi.left + _vd.dpi.width ||
    00696       right  <= _vd.dpi.left                 ||
    00697       top    >= _vd.dpi.top + _vd.dpi.height ||
    00698       bottom <= _vd.dpi.top) {
    00699     return;
    00700   }
    00701
    00702   ParentSpriteToDraw *ps = _vd.parent_sprites_to_draw.Append();
    00703   ps->x = tmp_x;
    00704   ps->y = tmp_y;
    00705
    00706   ps->left = tmp_left;
    00707   ps->top  = tmp_top;
    00708
    00709   ps->image = image;
    00710   ps->pal = pal;
    00711   ps->sub = sub;
    00712   ps->xmin = x + bb_offset_x;
    00713   ps->xmax = x + max(bb_offset_x, w) - 1;
    00714
    00715   ps->ymin = y + bb_offset_y;
    00716   ps->ymax = y + max(bb_offset_y, h) - 1;
    00717
    00718   ps->zmin = z + bb_offset_z;
    00719   ps->zmax = z + max(bb_offset_z, dz) - 1;
    00720
    00721   ps->comparison_done = false;
    00722   ps->first_child = -1;
    00723
    00724   _vd.last_child = &ps->first_child;
    00725
    00726   if (_vd.combine_sprites == SPRITE_COMBINE_PENDING) _vd.combine_sprites = SPRITE_COMBINE_ACTIVE;
    00727 }
    00728
    00747 void StartSpriteCombine()
    00748 {
    00749   assert(_vd.combine_sprites == SPRITE_COMBINE_NONE);
    00750   _vd.combine_sprites = SPRITE_COMBINE_PENDING;
    00751 }
    00752
    00757 void EndSpriteCombine()
    00758 {
    00759   assert(_vd.combine_sprites != SPRITE_COMBINE_NONE);
    00760   _vd.combine_sprites = SPRITE_COMBINE_NONE;
    00761 }
    00762
    00772 static bool IsInRangeInclusive(int begin, int end, int check)
    00773 {
    00774   if (begin > end) Swap(begin, end);
    00775   return begin <= check && check <= end;
    00776 }
    00777
    00784 bool IsInsideRotatedRectangle(int x, int y)
    00785 {
    00786   int dist_a = (_thd.size.x + _thd.size.y);      // Rotated coordinate system for selected rectangle.
    00787   int dist_b = (_thd.size.x - _thd.size.y);      // We don't have to divide by 2. It's all relative!
    00788   int a = ((x - _thd.pos.x) + (y - _thd.pos.y)); // Rotated coordinate system for the point under scrutiny.
    00789   int b = ((x - _thd.pos.x) - (y - _thd.pos.y));
    00790
    00791   /* Check if a and b are between 0 and dist_a or dist_b respectively. */
    00792   return IsInRangeInclusive(dist_a, 0, a) && IsInRangeInclusive(dist_b, 0, b);
    00793 }
    00794
    00805 void AddChildSpriteScreen(SpriteID image, PaletteID pal, int x, int y, bool transparent, const SubSprite *sub, bool scale)
    00806 {
    00807   assert((image & SPRITE_MASK) < MAX_SPRITES);
    00808
    00809   /* If the ParentSprite was clipped by the viewport bounds, do not draw the ChildSprites either */
    00810   if (_vd.last_child == NULL) return;
    00811
    00812   /* make the sprites transparent with the right palette */
    00813   if (transparent) {
    00814     SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
    00815     pal = PALETTE_TO_TRANSPARENT;
    00816   }
    00817
    00818   *_vd.last_child = _vd.child_screen_sprites_to_draw.Length();
    00819
    00820   ChildScreenSpriteToDraw *cs = _vd.child_screen_sprites_to_draw.Append();
    00821   cs->image = image;
    00822   cs->pal = pal;
    00823   cs->sub = sub;
    00824   cs->x = scale ? x * ZOOM_LVL_BASE : x;
    00825   cs->y = scale ? y * ZOOM_LVL_BASE : y;
    00826   cs->next = -1;
    00827
    00828   /* Append the sprite to the active ChildSprite list.
    00829    * If the active ParentSprite is a foundation, update last_foundation_child as well.
    00830    * Note: ChildSprites of foundations are NOT sequential in the vector, as selection sprites are added at last. */
    00831   if (_vd.last_foundation_child[0] == _vd.last_child) _vd.last_foundation_child[0] = &cs->next;
    00832   if (_vd.last_foundation_child[1] == _vd.last_child) _vd.last_foundation_child[1] = &cs->next;
    00833   _vd.last_child = &cs->next;
    00834 }
    00835
    00836 static void AddStringToDraw(int x, int y, StringID string, uint64 params_1, uint64 params_2, Colours colour, uint16 width)
    00837 {
    00838   assert(width != 0);
    00839   StringSpriteToDraw *ss = _vd.string_sprites_to_draw.Append();
    00840   ss->string = string;
    00841   ss->x = x;
    00842   ss->y = y;
    00843   ss->params[0] = params_1;
    00844   ss->params[1] = params_2;
    00845   ss->width = width;
    00846   ss->colour = colour;
    00847 }
    00848
    00849
    00861 static void DrawSelectionSprite(SpriteID image, PaletteID pal, const TileInfo *ti, int z_offset, FoundationPart foundation_part)
    00862 {
    00863   /* FIXME: This is not totally valid for some autorail highlights that extend over the edges of the tile. */
    00864   if (_vd.foundation[foundation_part] == -1) {
    00865     /* draw on real ground */
    00866     AddTileSpriteToDraw(image, pal, ti->x, ti->y, ti->z + z_offset);
    00867   } else {
    00868     /* draw on top of foundation */
    00869     AddChildSpriteToFoundation(image, pal, NULL, foundation_part, 0, -z_offset * ZOOM_LVL_BASE);
    00870   }
    00871 }
    00872
    00879 static void DrawTileSelectionRect(const TileInfo *ti, PaletteID pal)
    00880 {
    00881   if (!IsValidTile(ti->tile)) return;
    00882
    00883   SpriteID sel;
    00884   if (IsHalftileSlope(ti->tileh)) {
    00885     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
    00886     SpriteID sel2 = SPR_HALFTILE_SELECTION_FLAT + halftile_corner;
    00887     DrawSelectionSprite(sel2, pal, ti, 7 + TILE_HEIGHT, FOUNDATION_PART_HALFTILE);
    00888
    00889     Corner opposite_corner = OppositeCorner(halftile_corner);
    00890     if (IsSteepSlope(ti->tileh)) {
    00891       sel = SPR_HALFTILE_SELECTION_DOWN;
    00892     } else {
    00893       sel = ((ti->tileh & SlopeWithOneCornerRaised(opposite_corner)) != 0 ? SPR_HALFTILE_SELECTION_UP : SPR_HALFTILE_SELECTION_FLAT);
    00894     }
    00895     sel += opposite_corner;
    00896   } else {
    00897     sel = SPR_SELECT_TILE + SlopeToSpriteOffset(ti->tileh);
    00898   }
    00899   DrawSelectionSprite(sel, pal, ti, 7, FOUNDATION_PART_NORMAL);
    00900 }
    00901
    00902 static bool IsPartOfAutoLine(int px, int py)
    00903 {
    00904   px -= _thd.selstart.x;
    00905   py -= _thd.selstart.y;
    00906
    00907   if ((_thd.drawstyle & HT_DRAG_MASK) != HT_LINE) return false;
    00908
    00909   switch (_thd.drawstyle & HT_DIR_MASK) {
    00910     case HT_DIR_X:  return py == 0; // x direction
    00911     case HT_DIR_Y:  return px == 0; // y direction
    00912     case HT_DIR_HU: return px == -py || px == -py - 16; // horizontal upper
    00913     case HT_DIR_HL: return px == -py || px == -py + 16; // horizontal lower
    00914     case HT_DIR_VL: return px == py || px == py + 16; // vertical left
    00915     case HT_DIR_VR: return px == py || px == py - 16; // vertical right
    00916     default:
    00917       NOT_REACHED();
    00918   }
    00919 }
    00920
    00921 /* [direction][side] */
    00922 static const HighLightStyle _autorail_type[6][2] = {
    00923   { HT_DIR_X,  HT_DIR_X },
    00924   { HT_DIR_Y,  HT_DIR_Y },
    00925   { HT_DIR_HU, HT_DIR_HL },
    00926   { HT_DIR_HL, HT_DIR_HU },
    00927   { HT_DIR_VL, HT_DIR_VR },
    00928   { HT_DIR_VR, HT_DIR_VL }
    00929 };
    00930
    00931 #include "table/autorail.h"
    00932
    00939 static void DrawAutorailSelection(const TileInfo *ti, uint autorail_type)
    00940 {
    00941   SpriteID image;
    00942   PaletteID pal;
    00943   int offset;
    00944
    00945   FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
    00946   Slope autorail_tileh = RemoveHalftileSlope(ti->tileh);
    00947   if (IsHalftileSlope(ti->tileh)) {
    00948     static const uint _lower_rail[4] = { 5U, 2U, 4U, 3U };
    00949     Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
    00950     if (autorail_type != _lower_rail[halftile_corner]) {
    00951       foundation_part = FOUNDATION_PART_HALFTILE;
    00952       /* Here we draw the highlights of the "three-corners-raised"-slope. That looks ok to me. */
    00953       autorail_tileh = SlopeWithThreeCornersRaised(OppositeCorner(halftile_corner));
    00954     }
    00955   }
    00956
    00957   offset = _AutorailTilehSprite[autorail_tileh][autorail_type];
    00958   if (offset >= 0) {
    00959     image = SPR_AUTORAIL_BASE + offset;
    00960     pal = PAL_NONE;
    00961   } else {
    00962     image = SPR_AUTORAIL_BASE - offset;
    00963     pal = PALETTE_SEL_TILE_RED;
    00964   }
    00965
    00966   DrawSelectionSprite(image, _thd.make_square_red ? PALETTE_SEL_TILE_RED : pal, ti, 7, foundation_part);
    00967 }
    00968
    00973 static void DrawTileSelection(const TileInfo *ti)
    00974 {
    00975   /* Draw a red error square? */
    00976   bool is_redsq = _thd.redsq == ti->tile;
    00977   if (is_redsq) DrawTileSelectionRect(ti, PALETTE_TILE_RED_PULSATING);
    00978
    00979   /* No tile selection active? */
    00980   if ((_thd.drawstyle & HT_DRAG_MASK) == HT_NONE) return;
    00981
    00982   if (_thd.diagonal) { // We're drawing a 45 degrees rotated (diagonal) rectangle
    00983     if (IsInsideRotatedRectangle((int)ti->x, (int)ti->y)) goto draw_inner;
    00984     return;
    00985   }
    00986
    00987   /* Inside the inner area? */
    00988   if (IsInsideBS(ti->x, _thd.pos.x, _thd.size.x) &&
    00989       IsInsideBS(ti->y, _thd.pos.y, _thd.size.y)) {
    00990 draw_inner:
    00991     if (_thd.drawstyle & HT_RECT) {
    00992       if (!is_redsq) DrawTileSelectionRect(ti, _thd.make_square_red ? PALETTE_SEL_TILE_RED : PAL_NONE);
    00993     } else if (_thd.drawstyle & HT_POINT) {
    00994       /* Figure out the Z coordinate for the single dot. */
    00995       int z = 0;
    00996       FoundationPart foundation_part = FOUNDATION_PART_NORMAL;
    00997       if (ti->tileh & SLOPE_N) {
    00998         z += TILE_HEIGHT;
    00999         if (RemoveHalftileSlope(ti->tileh) == SLOPE_STEEP_N) z += TILE_HEIGHT;
    01000       }
    01001       if (IsHalftileSlope(ti->tileh)) {
    01002         Corner halftile_corner = GetHalftileSlopeCorner(ti->tileh);
    01003         if ((halftile_corner == CORNER_W) || (halftile_corner == CORNER_E)) z += TILE_HEIGHT;
    01004         if (halftile_corner != CORNER_S) {
    01005           foundation_part = FOUNDATION_PART_HALFTILE;
    01006           if (IsSteepSlope(ti->tileh)) z -= TILE_HEIGHT;
    01007         }
    01008       }
    01009       DrawSelectionSprite(_cur_dpi->zoom <= ZOOM_LVL_DETAIL ? SPR_DOT : SPR_DOT_SMALL, PAL_NONE, ti, z, foundation_part);
    01010     } else if (_thd.drawstyle & HT_RAIL) {
    01011       /* autorail highlight piece under cursor */
    01012       HighLightStyle type = _thd.drawstyle & HT_DIR_MASK;
    01013       assert(type < HT_DIR_END);
    01014       DrawAutorailSelection(ti, _autorail_type[type][0]);
    01015     } else if (IsPartOfAutoLine(ti->x, ti->y)) {
    01016       /* autorail highlighting long line */
    01017       HighLightStyle dir = _thd.drawstyle & HT_DIR_MASK;
    01018       uint side;
    01019
    01020       if (dir == HT_DIR_X || dir == HT_DIR_Y) {
    01021         side = 0;
    01022       } else {
    01023         TileIndex start = TileVirtXY(_thd.selstart.x, _thd.selstart.y);
    01024         side = Delta(Delta(TileX(start), TileX(ti->tile)), Delta(TileY(start), TileY(ti->tile)));
    01025       }
    01026
    01027       DrawAutorailSelection(ti, _autorail_type[dir][side]);
    01028     }
    01029     return;
    01030   }
    01031
    01032   /* Check if it's inside the outer area? */
    01033   if (!is_redsq && _thd.outersize.x > 0 &&
    01034       IsInsideBS(ti->x, _thd.pos.x + _thd.offs.x, _thd.size.x + _thd.outersize.x) &&
    01035       IsInsideBS(ti->y, _thd.pos.y + _thd.offs.y, _thd.size.y + _thd.outersize.y)) {
    01036     /* Draw a blue rect. */
    01037     DrawTileSelectionRect(ti, PALETTE_SEL_TILE_BLUE);
    01038     return;
    01039   }
    01040 }
    01041
    01042 static void ViewportAddLandscape()
    01043 {
    01044   int x, y, width, height;
    01045   TileInfo ti;
    01046   bool direction;
    01047
    01048   _cur_ti = &ti;
    01049
    01050   /* Transform into tile coordinates and round to closest full tile */
    01051   x = ((_vd.dpi.top >> (1 + ZOOM_LVL_SHIFT)) - (_vd.dpi.left >> (2 + ZOOM_LVL_SHIFT))) & ~TILE_UNIT_MASK;
    01052   y = ((_vd.dpi.top >> (1 + ZOOM_LVL_SHIFT)) + (_vd.dpi.left >> (2 + ZOOM_LVL_SHIFT)) - TILE_SIZE) & ~TILE_UNIT_MASK;
    01053
    01054   /* determine size of area */
    01055   {
    01056     Point pt = RemapCoords(x, y, 241);
    01057     width = (_vd.dpi.left + _vd.dpi.width - pt.x + 95 * ZOOM_LVL_BASE) >> (6 + ZOOM_LVL_SHIFT);
    01058     height = (_vd.dpi.top + _vd.dpi.height - pt.y) >> (5 + ZOOM_LVL_SHIFT) << 1;
    01059   }
    01060
    01061   assert(width > 0);
    01062   assert(height > 0);
    01063
    01064   direction = false;
    01065
    01066   do {
    01067     int width_cur = width;
    01068     uint x_cur = x;
    01069     uint y_cur = y;
    01070
    01071     do {
    01072       TileType tt = MP_VOID;
    01073
    01074       ti.x = x_cur;
    01075       ti.y = y_cur;
    01076
    01077       ti.z = 0;
    01078
    01079       ti.tileh = SLOPE_FLAT;
    01080       ti.tile = INVALID_TILE;
    01081
    01082       if (x_cur < MapMaxX() * TILE_SIZE &&
    01083           y_cur < MapMaxY() * TILE_SIZE) {
    01084         TileIndex tile = TileVirtXY(x_cur, y_cur);
    01085
    01086         if (!_settings_game.construction.freeform_edges || (TileX(tile) != 0 && TileY(tile) != 0)) {
    01087           if (x_cur == ((int)MapMaxX() - 1) * TILE_SIZE || y_cur == ((int)MapMaxY() - 1) * TILE_SIZE) {
    01088             uint maxh = max<uint>(TileHeight(tile), 1);
    01089             for (uint h = 0; h < maxh; h++) {
    01090               AddTileSpriteToDraw(SPR_SHADOW_CELL, PAL_NONE, ti.x, ti.y, h * TILE_HEIGHT);
    01091             }
    01092           }
    01093
    01094           ti.tile = tile;
    01095           ti.tileh = GetTilePixelSlope(tile, &ti.z);
    01096           tt = GetTileType(tile);
    01097         }
    01098       }
    01099
    01100       _vd.foundation_part = FOUNDATION_PART_NONE;
    01101       _vd.foundation[0] = -1;
    01102       _vd.foundation[1] = -1;
    01103       _vd.last_foundation_child[0] = NULL;
    01104       _vd.last_foundation_child[1] = NULL;
    01105
    01106       _tile_type_procs[tt]->draw_tile_proc(&ti);
    01107
    01108       if ((x_cur == (int)MapMaxX() * TILE_SIZE && IsInsideMM(y_cur, 0, MapMaxY() * TILE_SIZE + 1)) ||
    01109           (y_cur == (int)MapMaxY() * TILE_SIZE && IsInsideMM(x_cur, 0, MapMaxX() * TILE_SIZE + 1))) {
    01110         TileIndex tile = TileVirtXY(x_cur, y_cur);
    01111         ti.tile = tile;
    01112         ti.tileh = GetTilePixelSlope(tile, &ti.z);
    01113         tt = GetTileType(tile);
    01114       }
    01115       if (ti.tile != INVALID_TILE) DrawTileSelection(&ti);
    01116
    01117       y_cur += 0x10;
    01118       x_cur -= 0x10;
    01119     } while (--width_cur);
    01120
    01121     if ((direction ^= 1) != 0) {
    01122       y += 0x10;
    01123     } else {
    01124       x += 0x10;
    01125     }
    01126   } while (--height);
    01127 }
    01128
    01139 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)
    01140 {
    01141   bool small = dpi->zoom >= small_from;
    01142
    01143   int left   = dpi->left;
    01144   int top    = dpi->top;
    01145   int right  = left + dpi->width;
    01146   int bottom = top + dpi->height;
    01147
    01148   int sign_height     = ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM, dpi->zoom);
    01149   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, dpi->zoom);
    01150
    01151   if (bottom < sign->top ||
    01152       top   > sign->top + sign_height ||
    01153       right < sign->center - sign_half_width ||
    01154       left  > sign->center + sign_half_width) {
    01155     return;
    01156   }
    01157
    01158   if (!small) {
    01159     AddStringToDraw(sign->center - sign_half_width, sign->top, string_normal, params_1, params_2, colour, sign->width_normal);
    01160   } else {
    01161     int shadow_offset = 0;
    01162     if (string_small_shadow != STR_NULL) {
    01163       shadow_offset = 4;
    01164       AddStringToDraw(sign->center - sign_half_width + shadow_offset, sign->top, string_small_shadow, params_1, params_2, INVALID_COLOUR, sign->width_small);
    01165     }
    01166     AddStringToDraw(sign->center - sign_half_width, sign->top - shadow_offset, string_small, params_1, params_2,
    01167         colour, sign->width_small | 0x8000);
    01168   }
    01169 }
    01170
    01171 static void ViewportAddTownNames(DrawPixelInfo *dpi)
    01172 {
    01173   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES) || _game_mode == GM_MENU) return;
    01174
    01175   const Town *t;
    01176   FOR_ALL_TOWNS(t) {
    01177     ViewportAddString(dpi, ZOOM_LVL_OUT_16X, &t->sign,
    01178         _settings_client.gui.population_in_label ? STR_VIEWPORT_TOWN_POP : STR_VIEWPORT_TOWN,
    01179         STR_VIEWPORT_TOWN_TINY_WHITE, STR_VIEWPORT_TOWN_TINY_BLACK,
    01180         t->index, t->population);
    01181   }
    01182 }
    01183
    01184
    01185 static void ViewportAddStationNames(DrawPixelInfo *dpi)
    01186 {
    01187   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || _game_mode == GM_MENU) return;
    01188
    01189   const BaseStation *st;
    01190   FOR_ALL_BASE_STATIONS(st) {
    01191     /* Check whether the base station is a station or a waypoint */
    01192     bool is_station = Station::IsExpected(st);
    01193
    01194     /* Don't draw if the display options are disabled */
    01195     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
    01196
    01197     /* Don't draw if station is owned by another company and competitor station names are hidden. Stations owned by none are never ignored. */
    01198     if (!HasBit(_display_opt, DO_SHOW_COMPETITOR_SIGNS) && _local_company != st->owner && st->owner != OWNER_NONE) continue;
    01199
    01200     ViewportAddString(dpi, ZOOM_LVL_OUT_16X, &st->sign,
    01201         is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT,
    01202         (is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT) + 1, STR_NULL,
    01203         st->index, st->facilities, (st->owner == OWNER_NONE || !st->IsInUse()) ? COLOUR_GREY : _company_colours[st->owner]);
    01204   }
    01205 }
    01206
    01207
    01208 static void ViewportAddSigns(DrawPixelInfo *dpi)
    01209 {
    01210   /* Signs are turned off or are invisible */
    01211   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS)) return;
    01212
    01213   const Sign *si;
    01214   FOR_ALL_SIGNS(si) {
    01215     /* Don't draw if sign is owned by another company and competitor signs should be hidden.
    01216      * Note: It is intentional that also signs owned by OWNER_NONE are hidden. Bankrupt
    01217      * companies can leave OWNER_NONE signs after them. */
    01218     if (!HasBit(_display_opt, DO_SHOW_COMPETITOR_SIGNS) && _local_company != si->owner && si->owner != OWNER_DEITY) continue;
    01219
    01220     ViewportAddString(dpi, ZOOM_LVL_OUT_16X, &si->sign,
    01221         STR_WHITE_SIGN,
    01222         (IsTransparencySet(TO_SIGNS) || si->owner == OWNER_DEITY) ? STR_VIEWPORT_SIGN_SMALL_WHITE : STR_VIEWPORT_SIGN_SMALL_BLACK, STR_NULL,
    01223         si->index, 0, (si->owner == OWNER_NONE) ? COLOUR_GREY : (si->owner == OWNER_DEITY ? INVALID_COLOUR : _company_colours[si->owner]));
    01224   }
    01225 }
    01226
    01233 void ViewportSign::UpdatePosition(int center, int top, StringID str)
    01234 {
    01235   if (this->width_normal != 0) this->MarkDirty();
    01236
    01237   this->top = top;
    01238
    01239   char buffer[DRAW_STRING_BUFFER];
    01240
    01241   GetString(buffer, str, lastof(buffer));
    01242   this->width_normal = VPSM_LEFT + Align(GetStringBoundingBox(buffer).width, 2) + VPSM_RIGHT;
    01243   this->center = center;
    01244
    01245   /* zoomed out version */
    01246   this->width_small = VPSM_LEFT + Align(GetStringBoundingBox(buffer, FS_SMALL).width, 2) + VPSM_RIGHT;
    01247
    01248   this->MarkDirty();
    01249 }
    01250
    01257 void ViewportSign::MarkDirty(ZoomLevel maxzoom) const
    01258 {
    01259   Rect zoomlevels[ZOOM_LVL_COUNT];
    01260
    01261   for (ZoomLevel zoom = ZOOM_LVL_BEGIN; zoom != ZOOM_LVL_END; zoom++) {
    01262     /* FIXME: This doesn't switch to width_small when appropriate. */
    01263     zoomlevels[zoom].left   = this->center - ScaleByZoom(this->width_normal / 2 + 1, zoom);
    01264     zoomlevels[zoom].top    = this->top    - ScaleByZoom(1, zoom);
    01265     zoomlevels[zoom].right  = this->center + ScaleByZoom(this->width_normal / 2 + 1, zoom);
    01266     zoomlevels[zoom].bottom = this->top    + ScaleByZoom(VPSM_TOP + FONT_HEIGHT_NORMAL + VPSM_BOTTOM + 1, zoom);
    01267   }
    01268
    01269   Window *w;
    01270   FOR_ALL_WINDOWS_FROM_BACK(w) {
    01271     ViewPort *vp = w->viewport;
    01272     if (vp != NULL && vp->zoom <= maxzoom) {
    01273       assert(vp->width != 0);
    01274       Rect &zl = zoomlevels[vp->zoom];
    01275       MarkViewportDirty(vp, zl.left, zl.top, zl.right, zl.bottom);
    01276     }
    01277   }
    01278 }
    01279
    01280 static void ViewportDrawTileSprites(const TileSpriteToDrawVector *tstdv)
    01281 {
    01282   const TileSpriteToDraw *tsend = tstdv->End();
    01283   for (const TileSpriteToDraw *ts = tstdv->Begin(); ts != tsend; ++ts) {
    01284     DrawSpriteViewport(ts->image, ts->pal, ts->x, ts->y, ts->sub);
    01285   }
    01286 }
    01287
    01289 static void ViewportSortParentSprites(ParentSpriteToSortVector *psdv)
    01290 {
    01291   ParentSpriteToDraw **psdvend = psdv->End();
    01292   ParentSpriteToDraw **psd = psdv->Begin();
    01293   while (psd != psdvend) {
    01294     ParentSpriteToDraw *ps = *psd;
    01295
    01296     if (ps->comparison_done) {
    01297       psd++;
    01298       continue;
    01299     }
    01300
    01301     ps->comparison_done = true;
    01302
    01303     for (ParentSpriteToDraw **psd2 = psd + 1; psd2 != psdvend; psd2++) {
    01304       ParentSpriteToDraw *ps2 = *psd2;
    01305
    01306       if (ps2->comparison_done) continue;
    01307
    01308       /* Decide which comparator to use, based on whether the bounding
    01309        * boxes overlap
    01310        */
    01311       if (ps->xmax >= ps2->xmin && ps->xmin <= ps2->xmax && // overlap in X?
    01312           ps->ymax >= ps2->ymin && ps->ymin <= ps2->ymax && // overlap in Y?
    01313           ps->zmax >= ps2->zmin && ps->zmin <= ps2->zmax) { // overlap in Z?
    01314         /* Use X+Y+Z as the sorting order, so sprites closer to the bottom of
    01315          * the screen and with higher Z elevation, are drawn in front.
    01316          * Here X,Y,Z are the coordinates of the "center of mass" of the sprite,
    01317          * i.e. X=(left+right)/2, etc.
    01318          * However, since we only care about order, don't actually divide / 2
    01319          */
    01320         if (ps->xmin + ps->xmax + ps->ymin + ps->ymax + ps->zmin + ps->zmax <=
    01321             ps2->xmin + ps2->xmax + ps2->ymin + ps2->ymax + ps2->zmin + ps2->zmax) {
    01322           continue;
    01323         }
    01324       } else {
    01325         /* We only change the order, if it is definite.
    01326          * I.e. every single order of X, Y, Z says ps2 is behind ps or they overlap.
    01327          * That is: If one partial order says ps behind ps2, do not change the order.
    01328          */
    01329         if (ps->xmax < ps2->xmin ||
    01330             ps->ymax < ps2->ymin ||
    01331             ps->zmax < ps2->zmin) {
    01332           continue;
    01333         }
    01334       }
    01335
    01336       /* Move ps2 in front of ps */
    01337       ParentSpriteToDraw *temp = ps2;
    01338       for (ParentSpriteToDraw **psd3 = psd2; psd3 > psd; psd3--) {
    01339         *psd3 = *(psd3 - 1);
    01340       }
    01341       *psd = temp;
    01342     }
    01343   }
    01344 }
    01345
    01346 static void ViewportDrawParentSprites(const ParentSpriteToSortVector *psd, const ChildScreenSpriteToDrawVector *csstdv)
    01347 {
    01348   const ParentSpriteToDraw * const *psd_end = psd->End();
    01349   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
    01350     const ParentSpriteToDraw *ps = *it;
    01351     if (ps->image != SPR_EMPTY_BOUNDING_BOX) DrawSpriteViewport(ps->image, ps->pal, ps->x, ps->y, ps->sub);
    01352
    01353     int child_idx = ps->first_child;
    01354     while (child_idx >= 0) {
    01355       const ChildScreenSpriteToDraw *cs = csstdv->Get(child_idx);
    01356       child_idx = cs->next;
    01357       DrawSpriteViewport(cs->image, cs->pal, ps->left + cs->x, ps->top + cs->y, cs->sub);
    01358     }
    01359   }
    01360 }
    01361
    01366 static void ViewportDrawBoundingBoxes(const ParentSpriteToSortVector *psd)
    01367 {
    01368   const ParentSpriteToDraw * const *psd_end = psd->End();
    01369   for (const ParentSpriteToDraw * const *it = psd->Begin(); it != psd_end; it++) {
    01370     const ParentSpriteToDraw *ps = *it;
    01371     Point pt1 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmax + 1); // top front corner
    01372     Point pt2 = RemapCoords(ps->xmin    , ps->ymax + 1, ps->zmax + 1); // top left corner
    01373     Point pt3 = RemapCoords(ps->xmax + 1, ps->ymin    , ps->zmax + 1); // top right corner
    01374     Point pt4 = RemapCoords(ps->xmax + 1, ps->ymax + 1, ps->zmin    ); // bottom front corner
    01375
    01376     DrawBox(        pt1.x,         pt1.y,
    01377             pt2.x - pt1.x, pt2.y - pt1.y,
    01378             pt3.x - pt1.x, pt3.y - pt1.y,
    01379             pt4.x - pt1.x, pt4.y - pt1.y);
    01380   }
    01381 }
    01382
    01386 static void ViewportDrawDirtyBlocks()
    01387 {
    01388   Blitter *blitter = BlitterFactoryBase::GetCurrentBlitter();
    01389   const DrawPixelInfo *dpi = _cur_dpi;
    01390   void *dst;
    01391   int right =  UnScaleByZoom(dpi->width,  dpi->zoom);
    01392   int bottom = UnScaleByZoom(dpi->height, dpi->zoom);
    01393
    01394   int colour = _string_colourmap[_dirty_block_colour & 0xF];
    01395
    01396   dst = dpi->dst_ptr;
    01397
    01398   byte bo = UnScaleByZoom(dpi->left + dpi->top, dpi->zoom) & 1;
    01399   do {
    01400     for (int i = (bo ^= 1); i < right; i += 2) blitter->SetPixel(dst, i, 0, (uint8)colour);
    01401     dst = blitter->MoveTo(dst, 0, 1);
    01402   } while (--bottom > 0);
    01403 }
    01404
    01405 static void ViewportDrawStrings(ZoomLevel zoom, const StringSpriteToDrawVector *sstdv)
    01406 {
    01407   const StringSpriteToDraw *ssend = sstdv->End();
    01408   for (const StringSpriteToDraw *ss = sstdv->Begin(); ss != ssend; ++ss) {
    01409     TextColour colour = TC_BLACK;
    01410     bool small = HasBit(ss->width, 15);
    01411     int w = GB(ss->width, 0, 15);
    01412     int x = UnScaleByZoom(ss->x, zoom);
    01413     int y = UnScaleByZoom(ss->y, zoom);
    01414     int h = VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM;
    01415
    01416     SetDParam(0, ss->params[0]);
    01417     SetDParam(1, ss->params[1]);
    01418
    01419     if (ss->colour != INVALID_COLOUR) {
    01420       /* Do not draw signs nor station names if they are set invisible */
    01421       if (IsInvisibilitySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) continue;
    01422
    01423       /* if we didn't draw a rectangle, or if transparant building is on,
    01424        * draw the text in the colour the rectangle would have */
    01425       if (IsTransparencySet(TO_SIGNS) && ss->string != STR_WHITE_SIGN) {
    01426         /* Real colours need the TC_IS_PALETTE_COLOUR flag
    01427          * otherwise colours from _string_colourmap are assumed. */
    01428         colour = (TextColour)_colour_gradient[ss->colour][6] | TC_IS_PALETTE_COLOUR;
    01429       }
    01430
    01431       /* Draw the rectangle if 'tranparent station signs' is off,
    01432        * or if we are drawing a general text sign (STR_WHITE_SIGN) */
    01433       if (!IsTransparencySet(TO_SIGNS) || ss->string == STR_WHITE_SIGN) {
    01434         DrawFrameRect(
    01435           x, y, x + w, y + h, ss->colour,
    01436           IsTransparencySet(TO_SIGNS) ? FR_TRANSPARENT : FR_NONE
    01437         );
    01438       }
    01439     }
    01440
    01441     DrawString(x + VPSM_LEFT, x + w - 1 - VPSM_RIGHT, y + VPSM_TOP, ss->string, colour, SA_HOR_CENTER);
    01442   }
    01443 }
    01444
    01445 void ViewportDoDraw(const ViewPort *vp, int left, int top, int right, int bottom)
    01446 {
    01447   DrawPixelInfo *old_dpi = _cur_dpi;
    01448   _cur_dpi = &_vd.dpi;
    01449
    01450   _vd.dpi.zoom = vp->zoom;
    01451   int mask = ScaleByZoom(-1, vp->zoom);
    01452
    01453   _vd.combine_sprites = SPRITE_COMBINE_NONE;
    01454
    01455   _vd.dpi.width = (right - left) & mask;
    01456   _vd.dpi.height = (bottom - top) & mask;
    01457   _vd.dpi.left = left & mask;
    01458   _vd.dpi.top = top & mask;
    01459   _vd.dpi.pitch = old_dpi->pitch;
    01460   _vd.last_child = NULL;
    01461
    01462   int x = UnScaleByZoom(_vd.dpi.left - (vp->virtual_left & mask), vp->zoom) + vp->left;
    01463   int y = UnScaleByZoom(_vd.dpi.top - (vp->virtual_top & mask), vp->zoom) + vp->top;
    01464
    01465   _vd.dpi.dst_ptr = BlitterFactoryBase::GetCurrentBlitter()->MoveTo(old_dpi->dst_ptr, x - old_dpi->left, y - old_dpi->top);
    01466
    01467   ViewportAddLandscape();
    01468   ViewportAddVehicles(&_vd.dpi);
    01469
    01470   ViewportAddTownNames(&_vd.dpi);
    01471   ViewportAddStationNames(&_vd.dpi);
    01472   ViewportAddSigns(&_vd.dpi);
    01473
    01474   DrawTextEffects(&_vd.dpi);
    01475
    01476   if (_vd.tile_sprites_to_draw.Length() != 0) ViewportDrawTileSprites(&_vd.tile_sprites_to_draw);
    01477
    01478   ParentSpriteToDraw *psd_end = _vd.parent_sprites_to_draw.End();
    01479   for (ParentSpriteToDraw *it = _vd.parent_sprites_to_draw.Begin(); it != psd_end; it++) {
    01480     *_vd.parent_sprites_to_sort.Append() = it;
    01481   }
    01482
    01483   ViewportSortParentSprites(&_vd.parent_sprites_to_sort);
    01484   ViewportDrawParentSprites(&_vd.parent_sprites_to_sort, &_vd.child_screen_sprites_to_draw);
    01485
    01486   if (_draw_bounding_boxes) ViewportDrawBoundingBoxes(&_vd.parent_sprites_to_sort);
    01487   if (_draw_dirty_blocks) ViewportDrawDirtyBlocks();
    01488
    01489   DrawPixelInfo dp = _vd.dpi;
    01490   ZoomLevel zoom = _vd.dpi.zoom;
    01491   dp.zoom = ZOOM_LVL_NORMAL;
    01492   dp.width = UnScaleByZoom(dp.width, zoom);
    01493   dp.height = UnScaleByZoom(dp.height, zoom);
    01494   _cur_dpi = &dp;
    01495
    01496   /* translate to window coordinates */
    01497   dp.left = x;
    01498   dp.top = y;
    01499
    01500   if (vp->overlay != NULL) vp->overlay->Draw(&dp);
    01501
    01502   /* translate back to world coordinates */
    01503   dp.left = UnScaleByZoom(_vd.dpi.left, zoom);
    01504   dp.top = UnScaleByZoom(_vd.dpi.top, zoom);
    01505
    01506   if (_vd.string_sprites_to_draw.Length() != 0) ViewportDrawStrings(zoom, &_vd.string_sprites_to_draw);
    01507
    01508   _cur_dpi = old_dpi;
    01509
    01510   _vd.string_sprites_to_draw.Clear();
    01511   _vd.tile_sprites_to_draw.Clear();
    01512   _vd.parent_sprites_to_draw.Clear();
    01513   _vd.parent_sprites_to_sort.Clear();
    01514   _vd.child_screen_sprites_to_draw.Clear();
    01515 }
    01516
    01521 static void ViewportDrawChk(const ViewPort *vp, int left, int top, int right, int bottom)
    01522 {
    01523   if (ScaleByZoom(bottom - top, vp->zoom) * ScaleByZoom(right - left, vp->zoom) > 180000 * ZOOM_LVL_BASE * ZOOM_LVL_BASE) {
    01524     if ((bottom - top) > (right - left)) {
    01525       int t = (top + bottom) >> 1;
    01526       ViewportDrawChk(vp, left, top, right, t);
    01527       ViewportDrawChk(vp, left, t, right, bottom);
    01528     } else {
    01529       int t = (left + right) >> 1;
    01530       ViewportDrawChk(vp, left, top, t, bottom);
    01531       ViewportDrawChk(vp, t, top, right, bottom);
    01532     }
    01533   } else {
    01534     ViewportDoDraw(vp,
    01535       ScaleByZoom(left - vp->left, vp->zoom) + vp->virtual_left,
    01536       ScaleByZoom(top - vp->top, vp->zoom) + vp->virtual_top,
    01537       ScaleByZoom(right - vp->left, vp->zoom) + vp->virtual_left,
    01538       ScaleByZoom(bottom - vp->top, vp->zoom) + vp->virtual_top
    01539     );
    01540   }
    01541 }
    01542
    01543 static inline void ViewportDraw(const ViewPort *vp, int left, int top, int right, int bottom)
    01544 {
    01545   if (right <= vp->left || bottom <= vp->top) return;
    01546
    01547   if (left >= vp->left + vp->width) return;
    01548
    01549   if (left < vp->left) left = vp->left;
    01550   if (right > vp->left + vp->width) right = vp->left + vp->width;
    01551
    01552   if (top >= vp->top + vp->height) return;
    01553
    01554   if (top < vp->top) top = vp->top;
    01555   if (bottom > vp->top + vp->height) bottom = vp->top + vp->height;
    01556
    01557   ViewportDrawChk(vp, left, top, right, bottom);
    01558 }
    01559
    01563 void Window::DrawViewport() const
    01564 {
    01565   DrawPixelInfo *dpi = _cur_dpi;
    01566
    01567   dpi->left += this->left;
    01568   dpi->top += this->top;
    01569
    01570   ViewportDraw(this->viewport, dpi->left, dpi->top, dpi->left + dpi->width, dpi->top + dpi->height);
    01571
    01572   dpi->left -= this->left;
    01573   dpi->top -= this->top;
    01574 }
    01575
    01576 static inline void ClampViewportToMap(const ViewPort *vp, int &x, int &y)
    01577 {
    01578   /* Centre of the viewport is hot spot */
    01579   x += vp->virtual_width / 2;
    01580   y += vp->virtual_height / 2;
    01581
    01582   /* Convert viewport coordinates to map coordinates
    01583    * Calculation is scaled by 4 to avoid rounding errors */
    01584   int vx = -x + y * 2;
    01585   int vy =  x + y * 2;
    01586
    01587   /* clamp to size of map */
    01588   vx = Clamp(vx, 0, MapMaxX() * TILE_SIZE * 4 * ZOOM_LVL_BASE);
    01589   vy = Clamp(vy, 0, MapMaxY() * TILE_SIZE * 4 * ZOOM_LVL_BASE);
    01590
    01591   /* Convert map coordinates to viewport coordinates */
    01592   x = (-vx + vy) / 2;
    01593   y = ( vx + vy) / 4;
    01594
    01595   /* Remove centering */
    01596   x -= vp->virtual_width / 2;
    01597   y -= vp->virtual_height / 2;
    01598 }
    01599
    01604 void UpdateViewportPosition(Window *w)
    01605 {
    01606   const ViewPort *vp = w->viewport;
    01607
    01608   if (w->viewport->follow_vehicle != INVALID_VEHICLE) {
    01609     const Vehicle *veh = Vehicle::Get(w->viewport->follow_vehicle);
    01610     Point pt = MapXYZToViewport(vp, veh->x_pos, veh->y_pos, veh->z_pos);
    01611
    01612     w->viewport->scrollpos_x = pt.x;
    01613     w->viewport->scrollpos_y = pt.y;
    01614     SetViewportPosition(w, pt.x, pt.y);
    01615   } else {
    01616     /* Ensure the destination location is within the map */
    01617     ClampViewportToMap(vp, w->viewport->dest_scrollpos_x, w->viewport->dest_scrollpos_y);
    01618
    01619     int delta_x = w->viewport->dest_scrollpos_x - w->viewport->scrollpos_x;
    01620     int delta_y = w->viewport->dest_scrollpos_y - w->viewport->scrollpos_y;
    01621
    01622     bool update_overlay = false;
    01623     if (delta_x != 0 || delta_y != 0) {
    01624       if (_settings_client.gui.smooth_scroll) {
    01625         int max_scroll = ScaleByMapSize1D(512 * ZOOM_LVL_BASE);
    01626         /* Not at our desired position yet... */
    01627         w->viewport->scrollpos_x += Clamp(delta_x / 4, -max_scroll, max_scroll);
    01628         w->viewport->scrollpos_y += Clamp(delta_y / 4, -max_scroll, max_scroll);
    01629       } else {
    01630         w->viewport->scrollpos_x = w->viewport->dest_scrollpos_x;
    01631         w->viewport->scrollpos_y = w->viewport->dest_scrollpos_y;
    01632       }
    01633       update_overlay = (w->viewport->scrollpos_x == w->viewport->dest_scrollpos_x &&
    01634                 w->viewport->scrollpos_y == w->viewport->dest_scrollpos_y);
    01635     }
    01636
    01637     ClampViewportToMap(vp, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
    01638
    01639     SetViewportPosition(w, w->viewport->scrollpos_x, w->viewport->scrollpos_y);
    01640     if (update_overlay) RebuildViewportOverlay(w);
    01641   }
    01642 }
    01643
    01653 static void MarkViewportDirty(const ViewPort *vp, int left, int top, int right, int bottom)
    01654 {
    01655   right -= vp->virtual_left;
    01656   if (right <= 0) return;
    01657
    01658   bottom -= vp->virtual_top;
    01659   if (bottom <= 0) return;
    01660
    01661   left = max(0, left - vp->virtual_left);
    01662
    01663   if (left >= vp->virtual_width) return;
    01664
    01665   top = max(0, top - vp->virtual_top);
    01666
    01667   if (top >= vp->virtual_height) return;
    01668
    01669   SetDirtyBlocks(
    01670     UnScaleByZoomLower(left, vp->zoom) + vp->left,
    01671     UnScaleByZoomLower(top, vp->zoom) + vp->top,
    01672     UnScaleByZoom(right, vp->zoom) + vp->left + 1,
    01673     UnScaleByZoom(bottom, vp->zoom) + vp->top + 1
    01674   );
    01675 }
    01676
    01685 void MarkAllViewportsDirty(int left, int top, int right, int bottom)
    01686 {
    01687   Window *w;
    01688   FOR_ALL_WINDOWS_FROM_BACK(w) {
    01689     ViewPort *vp = w->viewport;
    01690     if (vp != NULL) {
    01691       assert(vp->width != 0);
    01692       MarkViewportDirty(vp, left, top, right, bottom);
    01693     }
    01694   }
    01695 }
    01696
    01697 void ConstrainAllViewportsZoom()
    01698 {
    01699   Window *w;
    01700   FOR_ALL_WINDOWS_FROM_FRONT(w) {
    01701     if (w->viewport == NULL) continue;
    01702
    01703     ZoomLevel zoom = static_cast<ZoomLevel>(Clamp(w->viewport->zoom, _settings_client.gui.zoom_min, _settings_client.gui.zoom_max));
    01704     if (zoom != w->viewport->zoom) {
    01705       while (w->viewport->zoom < zoom) DoZoomInOutWindow(ZOOM_OUT, w);
    01706       while (w->viewport->zoom > zoom) DoZoomInOutWindow(ZOOM_IN, w);
    01707     }
    01708   }
    01709 }
    01710
    01716 void MarkTileDirtyByTile(TileIndex tile)
    01717 {
    01718   Point pt = RemapCoords(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, GetTilePixelZ(tile));
    01719   MarkAllViewportsDirty(
    01720     pt.x - 31  * ZOOM_LVL_BASE,
    01721     pt.y - 122 * ZOOM_LVL_BASE,
    01722     pt.x - 31  * ZOOM_LVL_BASE + 67  * ZOOM_LVL_BASE,
    01723     pt.y - 122 * ZOOM_LVL_BASE + 154 * ZOOM_LVL_BASE
    01724   );
    01725 }
    01726
    01734 static void SetSelectionTilesDirty()
    01735 {
    01736   int x_size = _thd.size.x;
    01737   int y_size = _thd.size.y;
    01738
    01739   if (!_thd.diagonal) { // Selecting in a straigth rectangle (or a single square)
    01740     int x_start = _thd.pos.x;
    01741     int y_start = _thd.pos.y;
    01742
    01743     if (_thd.outersize.x != 0) {
    01744       x_size  += _thd.outersize.x;
    01745       x_start += _thd.offs.x;
    01746       y_size  += _thd.outersize.y;
    01747       y_start += _thd.offs.y;
    01748     }
    01749
    01750     x_size -= TILE_SIZE;
    01751     y_size -= TILE_SIZE;
    01752
    01753     assert(x_size >= 0);
    01754     assert(y_size >= 0);
    01755
    01756     int x_end = Clamp(x_start + x_size, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
    01757     int y_end = Clamp(y_start + y_size, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
    01758
    01759     x_start = Clamp(x_start, 0, MapSizeX() * TILE_SIZE - TILE_SIZE);
    01760     y_start = Clamp(y_start, 0, MapSizeY() * TILE_SIZE - TILE_SIZE);
    01761
    01762     /* make sure everything is multiple of TILE_SIZE */
    01763     assert((x_end | y_end | x_start | y_start) % TILE_SIZE == 0);
    01764
    01765     /* How it works:
    01766      * Suppose we have to mark dirty rectangle of 3x4 tiles:
    01767      *   x
    01768      *  xxx
    01769      * xxxxx
    01770      *  xxxxx
    01771      *   xxx
    01772      *    x
    01773      * This algorithm marks dirty columns of tiles, so it is done in 3+4-1 steps:
    01774      * 1)  x     2)  x
    01775      *    xxx       Oxx
    01776      *   Oxxxx     xOxxx
    01777      *    xxxxx     Oxxxx
    01778      *     xxx       xxx
    01779      *      x         x
    01780      * And so forth...
    01781      */
    01782
    01783     int top_x = x_end; // coordinates of top dirty tile
    01784     int top_y = y_start;
    01785     int bot_x = top_x; // coordinates of bottom dirty tile
    01786     int bot_y = top_y;
    01787
    01788     do {
    01789       /* topmost dirty point */
    01790       TileIndex top_tile = TileVirtXY(top_x, top_y);
    01791       Point top = RemapCoords(top_x, top_y, GetTileMaxPixelZ(top_tile));
    01792
    01793       /* bottommost point */
    01794       TileIndex bottom_tile = TileVirtXY(bot_x, bot_y);
    01795       Point bot = RemapCoords(bot_x + TILE_SIZE, bot_y + TILE_SIZE, GetTilePixelZ(bottom_tile)); // bottommost point
    01796
    01797       /* the 'x' coordinate of 'top' and 'bot' is the same (and always in the same distance from tile middle),
    01798        * tile height/slope affects only the 'y' on-screen coordinate! */
    01799
    01800       int l = top.x - (TILE_PIXELS - 2) * ZOOM_LVL_BASE; // 'x' coordinate of left side of dirty rectangle
    01801       int t = top.y;                     // 'y' coordinate of top side -//-
    01802       int r = top.x + (TILE_PIXELS - 2) * ZOOM_LVL_BASE; // right side of dirty rectangle
    01803       int b = bot.y;                     // bottom -//-
    01804
    01805       static const int OVERLAY_WIDTH = 4 * ZOOM_LVL_BASE; // part of selection sprites is drawn outside the selected area
    01806
    01807       /* For halftile foundations on SLOPE_STEEP_S the sprite extents some more towards the top */
    01808       MarkAllViewportsDirty(l - OVERLAY_WIDTH, t - OVERLAY_WIDTH - TILE_HEIGHT * ZOOM_LVL_BASE, r + OVERLAY_WIDTH, b + OVERLAY_WIDTH * ZOOM_LVL_BASE);
    01809
    01810       /* haven't we reached the topmost tile yet? */
    01811       if (top_x != x_start) {
    01812         top_x -= TILE_SIZE;
    01813       } else {
    01814         top_y += TILE_SIZE;
    01815       }
    01816
    01817       /* the way the bottom tile changes is different when we reach the bottommost tile */
    01818       if (bot_y != y_end) {
    01819         bot_y += TILE_SIZE;
    01820       } else {
    01821         bot_x -= TILE_SIZE;
    01822       }
    01823     } while (bot_x >= top_x);
    01824   } else { // Selecting in a 45 degrees rotated (diagonal) rectangle.
    01825     /* a_size, b_size describe a rectangle with rotated coordinates */
    01826     int a_size = x_size + y_size, b_size = x_size - y_size;
    01827
    01828     int interval_a = a_size < 0 ? -(int)TILE_SIZE : (int)TILE_SIZE;
    01829     int interval_b = b_size < 0 ? -(int)TILE_SIZE : (int)TILE_SIZE;
    01830
    01831     for (int a = -interval_a; a != a_size + interval_a; a += interval_a) {
    01832       for (int b = -interval_b; b != b_size + interval_b; b += interval_b) {
    01833         uint x = (_thd.pos.x + (a + b) / 2) / TILE_SIZE;
    01834         uint y = (_thd.pos.y + (a - b) / 2) / TILE_SIZE;
    01835
    01836         if (x < MapMaxX() && y < MapMaxY()) {
    01837           MarkTileDirtyByTile(TileXY(x, y));
    01838         }
    01839       }
    01840     }
    01841   }
    01842 }
    01843
    01844
    01845 void SetSelectionRed(bool b)
    01846 {
    01847   _thd.make_square_red = b;
    01848   SetSelectionTilesDirty();
    01849 }
    01850
    01859 static bool CheckClickOnViewportSign(const ViewPort *vp, int x, int y, const ViewportSign *sign)
    01860 {
    01861   bool small = (vp->zoom >= ZOOM_LVL_OUT_16X);
    01862   int sign_half_width = ScaleByZoom((small ? sign->width_small : sign->width_normal) / 2, vp->zoom);
    01863   int sign_height = ScaleByZoom(VPSM_TOP + (small ? FONT_HEIGHT_SMALL : FONT_HEIGHT_NORMAL) + VPSM_BOTTOM, vp->zoom);
    01864
    01865   x = ScaleByZoom(x - vp->left, vp->zoom) + vp->virtual_left;
    01866   y = ScaleByZoom(y - vp->top, vp->zoom) + vp->virtual_top;
    01867
    01868   return y >= sign->top && y < sign->top + sign_height &&
    01869       x >= sign->center - sign_half_width && x < sign->center + sign_half_width;
    01870 }
    01871
    01872 static bool CheckClickOnTown(const ViewPort *vp, int x, int y)
    01873 {
    01874   if (!HasBit(_display_opt, DO_SHOW_TOWN_NAMES)) return false;
    01875
    01876   const Town *t;
    01877   FOR_ALL_TOWNS(t) {
    01878     if (CheckClickOnViewportSign(vp, x, y, &t->sign)) {
    01879       ShowTownViewWindow(t->index);
    01880       return true;
    01881     }
    01882   }
    01883
    01884   return false;
    01885 }
    01886
    01887 static bool CheckClickOnStation(const ViewPort *vp, int x, int y)
    01888 {
    01889   if (!(HasBit(_display_opt, DO_SHOW_STATION_NAMES) || HasBit(_display_opt, DO_SHOW_WAYPOINT_NAMES)) || IsInvisibilitySet(TO_SIGNS)) return false;
    01890
    01891   const BaseStation *st;
    01892   FOR_ALL_BASE_STATIONS(st) {
    01893     /* Check whether the base station is a station or a waypoint */
    01894     bool is_station = Station::IsExpected(st);
    01895
    01896     /* Don't check if the display options are disabled */
    01897     if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
    01898
    01899     /* Don't check if competitor signs are not shown and the sign isn't owned by the local company */
    01900     if (!HasBit(_display_opt, DO_SHOW_COMPETITOR_SIGNS) && _local_company != st->owner && st->owner != OWNER_NONE) continue;
    01901
    01902     if (CheckClickOnViewportSign(vp, x, y, &st->sign)) {
    01903       if (is_station) {
    01904         ShowStationViewWindow(st->index);
    01905       } else {
    01906         ShowWaypointWindow(Waypoint::From(st));
    01907       }
    01908       return true;
    01909     }
    01910   }
    01911
    01912   return false;
    01913 }
    01914
    01915
    01916 static bool CheckClickOnSign(const ViewPort *vp, int x, int y)
    01917 {
    01918   /* Signs are turned off, or they are transparent and invisibility is ON, or company is a spectator */
    01919   if (!HasBit(_display_opt, DO_SHOW_SIGNS) || IsInvisibilitySet(TO_SIGNS) || _local_company == COMPANY_SPECTATOR) return false;
    01920
    01921   const Sign *si;
    01922   FOR_ALL_SIGNS(si) {
    01923     /* If competitor signs are hidden, don't check signs that aren't owned by local company */
    01924     if (!HasBit(_display_opt, DO_SHOW_COMPETITOR_SIGNS) && _local_company != si->owner && si->owner != OWNER_DEITY) continue;
    01925     if (si->owner == OWNER_DEITY && _game_mode != GM_EDITOR) continue;
    01926
    01927     if (CheckClickOnViewportSign(vp, x, y, &si->sign)) {
    01928       HandleClickOnSign(si);
    01929       return true;
    01930     }
    01931   }
    01932
    01933   return false;
    01934 }
    01935
    01936
    01937 static bool CheckClickOnLandscape(const ViewPort *vp, int x, int y)
    01938 {
    01939   Point pt = TranslateXYToTileCoord(vp, x, y);
    01940
    01941   if (pt.x != -1) return ClickTile(TileVirtXY(pt.x, pt.y));
    01942   return true;
    01943 }
    01944
    01945 static void PlaceObject()
    01946 {
    01947   Point pt;
    01948   Window *w;
    01949
    01950   pt = GetTileBelowCursor();
    01951   if (pt.x == -1) return;
    01952
    01953   if ((_thd.place_mode & HT_DRAG_MASK) == HT_POINT) {
    01954     pt.x += TILE_SIZE / 2;
    01955     pt.y += TILE_SIZE / 2;
    01956   }
    01957
    01958   _tile_fract_coords.x = pt.x & TILE_UNIT_MASK;
    01959   _tile_fract_coords.y = pt.y & TILE_UNIT_MASK;
    01960
    01961   w = _thd.GetCallbackWnd();
    01962   if (w != NULL) w->OnPlaceObject(pt, TileVirtXY(pt.x, pt.y));
    01963 }
    01964
    01965
    01966 bool HandleViewportClicked(const ViewPort *vp, int x, int y)
    01967 {
    01968   const Vehicle *v = CheckClickOnVehicle(vp, x, y);
    01969
    01970   if (_thd.place_mode & HT_VEHICLE) {
    01971     if (v != NULL && VehicleClicked(v)) return true;
    01972   }
    01973
    01974   /* Vehicle placement mode already handled above. */
    01975   if ((_thd.place_mode & HT_DRAG_MASK) != HT_NONE) {
    01976     PlaceObject();
    01977     return true;
    01978   }
    01979
    01980   if (CheckClickOnTown(vp, x, y)) return true;
    01981   if (CheckClickOnStation(vp, x, y)) return true;
    01982   if (CheckClickOnSign(vp, x, y)) return true;
    01983   bool result = CheckClickOnLandscape(vp, x, y);
    01984
    01985   if (v != NULL) {
    01986     DEBUG(misc, 2, "Vehicle %d (index %d) at %p", v->unitnumber, v->index, v);
    01987     if (IsCompanyBuildableVehicleType(v)) {
    01988       v = v->First();
    01989       if (_ctrl_pressed && v->owner == _local_company) {
    01990         StartStopVehicle(v, true);
    01991       } else {
    01992         ShowVehicleViewWindow(v);
    01993       }
    01994     }
    01995     return true;
    01996   }
    01997   return result;
    01998 }
    01999
    02000 void RebuildViewportOverlay(Window *w)
    02001 {
    02002   if (w->viewport->overlay != NULL &&
    02003       w->viewport->overlay->GetCompanyMask() != 0 &&
    02004       w->viewport->overlay->GetCargoMask() != 0) {
    02005     w->viewport->overlay->RebuildCache();
    02006     w->SetDirty();
    02007   }
    02008 }
    02009
    02019 bool ScrollWindowTo(int x, int y, int z, Window *w, bool instant)
    02020 {
    02021   /* The slope cannot be acquired outside of the map, so make sure we are always within the map. */
    02022   if (z == -1) z = GetSlopePixelZ(Clamp(x, 0, MapSizeX() * TILE_SIZE - 1), Clamp(y, 0, MapSizeY() * TILE_SIZE - 1));
    02023
    02024   Point pt = MapXYZToViewport(w->viewport, x, y, z);
    02025   w->viewport->follow_vehicle = INVALID_VEHICLE;
    02026
    02027   if (w->viewport->dest_scrollpos_x == pt.x && w->viewport->dest_scrollpos_y == pt.y) return false;
    02028
    02029   if (instant) {
    02030     w->viewport->scrollpos_x = pt.x;
    02031     w->viewport->scrollpos_y = pt.y;
    02032     RebuildViewportOverlay(w);
    02033   }
    02034
    02035   w->viewport->dest_scrollpos_x = pt.x;
    02036   w->viewport->dest_scrollpos_y = pt.y;
    02037   return true;
    02038 }
    02039
    02047 bool ScrollWindowToTile(TileIndex tile, Window *w, bool instant)
    02048 {
    02049   return ScrollWindowTo(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, -1, w, instant);
    02050 }
    02051
    02058 bool ScrollMainWindowToTile(TileIndex tile, bool instant)
    02059 {
    02060   return ScrollMainWindowTo(TileX(tile) * TILE_SIZE + TILE_SIZE / 2, TileY(tile) * TILE_SIZE + TILE_SIZE / 2, -1, instant);
    02061 }
    02062
    02067 void SetRedErrorSquare(TileIndex tile)
    02068 {
    02069   TileIndex old;
    02070
    02071   old = _thd.redsq;
    02072   _thd.redsq = tile;
    02073
    02074   if (tile != old) {
    02075     if (tile != INVALID_TILE) MarkTileDirtyByTile(tile);
    02076     if (old  != INVALID_TILE) MarkTileDirtyByTile(old);
    02077   }
    02078 }
    02079
    02085 void SetTileSelectSize(int w, int h)
    02086 {
    02087   _thd.new_size.x = w * TILE_SIZE;
    02088   _thd.new_size.y = h * TILE_SIZE;
    02089   _thd.new_outersize.x = 0;
    02090   _thd.new_outersize.y = 0;
    02091 }
    02092
    02093 void SetTileSelectBigSize(int ox, int oy, int sx, int sy)
    02094 {
    02095   _thd.offs.x = ox * TILE_SIZE;
    02096   _thd.offs.y = oy * TILE_SIZE;
    02097   _thd.new_outersize.x = sx * TILE_SIZE;
    02098   _thd.new_outersize.y = sy * TILE_SIZE;
    02099 }
    02100
    02102 static HighLightStyle GetAutorailHT(int x, int y)
    02103 {
    02104   return HT_RAIL | _autorail_piece[x & TILE_UNIT_MASK][y & TILE_UNIT_MASK];
    02105 }
    02106
    02110 void TileHighlightData::Reset()
    02111 {
    02112   this->pos.x = 0;
    02113   this->pos.y = 0;
    02114   this->new_pos.x = 0;
    02115   this->new_pos.y = 0;
    02116 }
    02117
    02122 bool TileHighlightData::IsDraggingDiagonal()
    02123 {
    02124   return (this->place_mode & HT_DIAGONAL) != 0 && _ctrl_pressed && _left_button_down;
    02125 }
    02126
    02131 Window *TileHighlightData::GetCallbackWnd()
    02132 {
    02133   return FindWindowById(this->window_class, this->window_number);
    02134 }
    02135
    02136
    02137
    02145 void UpdateTileSelection()
    02146 {
    02147   int x1;
    02148   int y1;
    02149
    02150   HighLightStyle new_drawstyle = HT_NONE;
    02151   bool new_diagonal = false;
    02152
    02153   if ((_thd.place_mode & HT_DRAG_MASK) == HT_SPECIAL) {
    02154     x1 = _thd.selend.x;
    02155     y1 = _thd.selend.y;
    02156     if (x1 != -1) {
    02157       int x2 = _thd.selstart.x & ~TILE_UNIT_MASK;
    02158       int y2 = _thd.selstart.y & ~TILE_UNIT_MASK;
    02159       x1 &= ~TILE_UNIT_MASK;
    02160       y1 &= ~TILE_UNIT_MASK;
    02161
    02162       if (_thd.IsDraggingDiagonal()) {
    02163         new_diagonal = true;
    02164       } else {
    02165         if (x1 >= x2) Swap(x1, x2);
    02166         if (y1 >= y2) Swap(y1, y2);
    02167       }
    02168       _thd.new_pos.x = x1;
    02169       _thd.new_pos.y = y1;
    02170       _thd.new_size.x = x2 - x1;
    02171       _thd.new_size.y = y2 - y1;
    02172       if (!new_diagonal) {
    02173         _thd.new_size.x += TILE_SIZE;
    02174         _thd.new_size.y += TILE_SIZE;
    02175       }
    02176       new_drawstyle = _thd.next_drawstyle;
    02177     }
    02178   } else if ((_thd.place_mode & HT_DRAG_MASK) != HT_NONE) {
    02179     Point pt = GetTileBelowCursor();
    02180     x1 = pt.x;
    02181     y1 = pt.y;
    02182     if (x1 != -1) {
    02183       switch (_thd.place_mode & HT_DRAG_MASK) {
    02184         case HT_RECT:
    02185           new_drawstyle = HT_RECT;
    02186           break;
    02187         case HT_POINT:
    02188           new_drawstyle = HT_POINT;
    02189           x1 += TILE_SIZE / 2;
    02190           y1 += TILE_SIZE / 2;
    02191           break;
    02192         case HT_RAIL:
    02193           /* Draw one highlighted tile in any direction */
    02194           new_drawstyle = GetAutorailHT(pt.x, pt.y);
    02195           break;
    02196         case HT_LINE:
    02197           switch (_thd.place_mode & HT_DIR_MASK) {
    02198             case HT_DIR_X: new_drawstyle = HT_LINE | HT_DIR_X; break;
    02199             case HT_DIR_Y: new_drawstyle = HT_LINE | HT_DIR_Y; break;
    02200
    02201             case HT_DIR_HU:
    02202             case HT_DIR_HL:
    02203               new_drawstyle = (pt.x & TILE_UNIT_MASK) + (pt.y & TILE_UNIT_MASK) <= TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
    02204               break;
    02205
    02206             case HT_DIR_VL:
    02207             case HT_DIR_VR:
    02208               new_drawstyle = (pt.x & TILE_UNIT_MASK) > (pt.y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02209               break;
    02210
    02211             default: NOT_REACHED();
    02212           }
    02213           _thd.selstart.x = x1 & ~TILE_UNIT_MASK;
    02214           _thd.selstart.y = y1 & ~TILE_UNIT_MASK;
    02215           break;
    02216         default:
    02217           NOT_REACHED();
    02218           break;
    02219       }
    02220       _thd.new_pos.x = x1 & ~TILE_UNIT_MASK;
    02221       _thd.new_pos.y = y1 & ~TILE_UNIT_MASK;
    02222     }
    02223   }
    02224
    02225   /* redraw selection */
    02226   if (_thd.drawstyle != new_drawstyle ||
    02227       _thd.pos.x != _thd.new_pos.x || _thd.pos.y != _thd.new_pos.y ||
    02228       _thd.size.x != _thd.new_size.x || _thd.size.y != _thd.new_size.y ||
    02229       _thd.outersize.x != _thd.new_outersize.x ||
    02230       _thd.outersize.y != _thd.new_outersize.y ||
    02231       _thd.diagonal    != new_diagonal) {
    02232     /* Clear the old tile selection? */
    02233     if ((_thd.drawstyle & HT_DRAG_MASK) != HT_NONE) SetSelectionTilesDirty();
    02234
    02235     _thd.drawstyle = new_drawstyle;
    02236     _thd.pos = _thd.new_pos;
    02237     _thd.size = _thd.new_size;
    02238     _thd.outersize = _thd.new_outersize;
    02239     _thd.diagonal = new_diagonal;
    02240     _thd.dirty = 0xff;
    02241
    02242     /* Draw the new tile selection? */
    02243     if ((new_drawstyle & HT_DRAG_MASK) != HT_NONE) SetSelectionTilesDirty();
    02244   }
    02245 }
    02246
    02254 static inline void ShowMeasurementTooltips(StringID str, uint paramcount, const uint64 params[], TooltipCloseCondition close_cond = TCC_LEFT_CLICK)
    02255 {
    02256   if (!_settings_client.gui.measure_tooltip) return;
    02257   GuiShowTooltips(_thd.GetCallbackWnd(), str, paramcount, params, close_cond);
    02258 }
    02259
    02261 void VpStartPlaceSizing(TileIndex tile, ViewportPlaceMethod method, ViewportDragDropSelectionProcess process)
    02262 {
    02263   _thd.select_method = method;
    02264   _thd.select_proc   = process;
    02265   _thd.selend.x = TileX(tile) * TILE_SIZE;
    02266   _thd.selstart.x = TileX(tile) * TILE_SIZE;
    02267   _thd.selend.y = TileY(tile) * TILE_SIZE;
    02268   _thd.selstart.y = TileY(tile) * TILE_SIZE;
    02269
    02270   /* Needed so several things (road, autoroad, bridges, ...) are placed correctly.
    02271    * In effect, placement starts from the centre of a tile
    02272    */
    02273   if (method == VPM_X_OR_Y || method == VPM_FIX_X || method == VPM_FIX_Y) {
    02274     _thd.selend.x += TILE_SIZE / 2;
    02275     _thd.selend.y += TILE_SIZE / 2;
    02276     _thd.selstart.x += TILE_SIZE / 2;
    02277     _thd.selstart.y += TILE_SIZE / 2;
    02278   }
    02279
    02280   HighLightStyle others = _thd.place_mode & ~(HT_DRAG_MASK | HT_DIR_MASK);
    02281   if ((_thd.place_mode & HT_DRAG_MASK) == HT_RECT) {
    02282     _thd.place_mode = HT_SPECIAL | others;
    02283     _thd.next_drawstyle = HT_RECT | others;
    02284   } else if (_thd.place_mode & (HT_RAIL | HT_LINE)) {
    02285     _thd.place_mode = HT_SPECIAL | others;
    02286     _thd.next_drawstyle = _thd.drawstyle | others;
    02287   } else {
    02288     _thd.place_mode = HT_SPECIAL | others;
    02289     _thd.next_drawstyle = HT_POINT | others;
    02290   }
    02291   _special_mouse_mode = WSM_SIZING;
    02292 }
    02293
    02294 void VpSetPlaceSizingLimit(int limit)
    02295 {
    02296   _thd.sizelimit = limit;
    02297 }
    02298
    02304 void VpSetPresizeRange(TileIndex from, TileIndex to)
    02305 {
    02306   uint64 distance = DistanceManhattan(from, to) + 1;
    02307
    02308   _thd.selend.x = TileX(to) * TILE_SIZE;
    02309   _thd.selend.y = TileY(to) * TILE_SIZE;
    02310   _thd.selstart.x = TileX(from) * TILE_SIZE;
    02311   _thd.selstart.y = TileY(from) * TILE_SIZE;
    02312   _thd.next_drawstyle = HT_RECT;
    02313
    02314   /* show measurement only if there is any length to speak of */
    02315   if (distance > 1) ShowMeasurementTooltips(STR_MEASURE_LENGTH, 1, &distance, TCC_HOVER);
    02316 }
    02317
    02318 static void VpStartPreSizing()
    02319 {
    02320   _thd.selend.x = -1;
    02321   _special_mouse_mode = WSM_PRESIZE;
    02322 }
    02323
    02328 static HighLightStyle Check2x1AutoRail(int mode)
    02329 {
    02330   int fxpy = _tile_fract_coords.x + _tile_fract_coords.y;
    02331   int sxpy = (_thd.selend.x & TILE_UNIT_MASK) + (_thd.selend.y & TILE_UNIT_MASK);
    02332   int fxmy = _tile_fract_coords.x - _tile_fract_coords.y;
    02333   int sxmy = (_thd.selend.x & TILE_UNIT_MASK) - (_thd.selend.y & TILE_UNIT_MASK);
    02334
    02335   switch (mode) {
    02336     default: NOT_REACHED();
    02337     case 0: // end piece is lower right
    02338       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
    02339       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
    02340       return HT_DIR_Y;
    02341
    02342     case 1:
    02343       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
    02344       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
    02345       return HT_DIR_Y;
    02346
    02347     case 2:
    02348       if (fxmy > 3 && sxmy < -3) return HT_DIR_VL;
    02349       if (fxpy >= 20 && sxpy <= 12) return HT_DIR_HL;
    02350       return HT_DIR_X;
    02351
    02352     case 3:
    02353       if (fxmy < -3 && sxmy > 3) return HT_DIR_VR;
    02354       if (fxpy <= 12 && sxpy >= 20) return HT_DIR_HU;
    02355       return HT_DIR_X;
    02356   }
    02357 }
    02358
    02372 static bool SwapDirection(HighLightStyle style, TileIndex start_tile, TileIndex end_tile)
    02373 {
    02374   uint start_x = TileX(start_tile);
    02375   uint start_y = TileY(start_tile);
    02376   uint end_x = TileX(end_tile);
    02377   uint end_y = TileY(end_tile);
    02378
    02379   switch (style & HT_DRAG_MASK) {
    02380     case HT_RAIL:
    02381     case HT_LINE: return (end_x > start_x || (end_x == start_x && end_y > start_y));
    02382
    02383     case HT_RECT:
    02384     case HT_POINT: return (end_x != start_x && end_y < start_y);
    02385     default: NOT_REACHED();
    02386   }
    02387
    02388   return false;
    02389 }
    02390
    02406 static int CalcHeightdiff(HighLightStyle style, uint distance, TileIndex start_tile, TileIndex end_tile)
    02407 {
    02408   bool swap = SwapDirection(style, start_tile, end_tile);
    02409   uint h0, h1; // Start height and end height.
    02410
    02411   if (start_tile == end_tile) return 0;
    02412   if (swap) Swap(start_tile, end_tile);
    02413
    02414   switch (style & HT_DRAG_MASK) {
    02415     case HT_RECT: {
    02416       static const TileIndexDiffC heightdiff_area_by_dir[] = {
    02417         /* Start */ {1, 0}, /* Dragging east */ {0, 0}, // Dragging south
    02418         /* End   */ {0, 1}, /* Dragging east */ {1, 1}  // Dragging south
    02419       };
    02420
    02421       /* In the case of an area we can determine whether we were dragging south or
    02422        * east by checking the X-coordinates of the tiles */
    02423       byte style_t = (byte)(TileX(end_tile) > TileX(start_tile));
    02424       start_tile = TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_area_by_dir[style_t]));
    02425       end_tile   = TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_area_by_dir[2 + style_t]));
    02426       /* FALL THROUGH */
    02427     }
    02428
    02429     case HT_POINT:
    02430       h0 = TileHeight(start_tile);
    02431       h1 = TileHeight(end_tile);
    02432       break;
    02433     default: { // All other types, this is mostly only line/autorail
    02434       static const HighLightStyle flip_style_direction[] = {
    02435         HT_DIR_X, HT_DIR_Y, HT_DIR_HL, HT_DIR_HU, HT_DIR_VR, HT_DIR_VL
    02436       };
    02437       static const TileIndexDiffC heightdiff_line_by_dir[] = {
    02438         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_X  */ {0, 1}, {1, 1}, // HT_DIR_Y
    02439         /* Start */ {1, 0}, {0, 0}, /* HT_DIR_HU */ {1, 0}, {1, 1}, // HT_DIR_HL
    02440         /* Start */ {1, 0}, {1, 1}, /* HT_DIR_VL */ {0, 1}, {1, 1}, // HT_DIR_VR
    02441
    02442         /* Start */ {0, 1}, {0, 0}, /* HT_DIR_X  */ {1, 0}, {0, 0}, // HT_DIR_Y
    02443         /* End   */ {0, 1}, {0, 0}, /* HT_DIR_HU */ {1, 1}, {0, 1}, // HT_DIR_HL
    02444         /* End   */ {1, 0}, {0, 0}, /* HT_DIR_VL */ {0, 0}, {0, 1}, // HT_DIR_VR
    02445       };
    02446
    02447       distance %= 2; // we're only interested if the distance is even or uneven
    02448       style &= HT_DIR_MASK;
    02449
    02450       /* To handle autorail, we do some magic to be able to use a lookup table.
    02451        * Firstly if we drag the other way around, we switch start&end, and if needed
    02452        * also flip the drag-position. Eg if it was on the left, and the distance is even
    02453        * that means the end, which is now the start is on the right */
    02454       if (swap && distance == 0) style = flip_style_direction[style];
    02455
    02456       /* Use lookup table for start-tile based on HighLightStyle direction */
    02457       byte style_t = style * 2;
    02458       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
    02459       h0 = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t])));
    02460       uint ht = TileHeight(TILE_ADD(start_tile, ToTileIndexDiff(heightdiff_line_by_dir[style_t + 1])));
    02461       h0 = max(h0, ht);
    02462
    02463       /* Use lookup table for end-tile based on HighLightStyle direction
    02464        * flip around side (lower/upper, left/right) based on distance */
    02465       if (distance == 0) style_t = flip_style_direction[style] * 2;
    02466       assert(style_t < lengthof(heightdiff_line_by_dir) - 13);
    02467       h1 = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t])));
    02468       ht = TileHeight(TILE_ADD(end_tile, ToTileIndexDiff(heightdiff_line_by_dir[12 + style_t + 1])));
    02469       h1 = max(h1, ht);
    02470       break;
    02471     }
    02472   }
    02473
    02474   if (swap) Swap(h0, h1);
    02475   return (int)(h1 - h0) * TILE_HEIGHT_STEP;
    02476 }
    02477
    02478 static const StringID measure_strings_length[] = {STR_NULL, STR_MEASURE_LENGTH, STR_MEASURE_LENGTH_HEIGHTDIFF};
    02479
    02486 static void CheckUnderflow(int &test, int &other, int mult)
    02487 {
    02488   if (test >= 0) return;
    02489
    02490   other += mult * test;
    02491   test = 0;
    02492 }
    02493
    02501 static void CheckOverflow(int &test, int &other, int max, int mult)
    02502 {
    02503   if (test <= max) return;
    02504
    02505   other += mult * (test - max);
    02506   test = max;
    02507 }
    02508
    02510 static void CalcRaildirsDrawstyle(int x, int y, int method)
    02511 {
    02512   HighLightStyle b;
    02513
    02514   int dx = _thd.selstart.x - (_thd.selend.x & ~TILE_UNIT_MASK);
    02515   int dy = _thd.selstart.y - (_thd.selend.y & ~TILE_UNIT_MASK);
    02516   uint w = abs(dx) + TILE_SIZE;
    02517   uint h = abs(dy) + TILE_SIZE;
    02518
    02519   if (method & ~(VPM_RAILDIRS | VPM_SIGNALDIRS)) {
    02520     /* We 'force' a selection direction; first four rail buttons. */
    02521     method &= ~(VPM_RAILDIRS | VPM_SIGNALDIRS);
    02522     int raw_dx = _thd.selstart.x - _thd.selend.x;
    02523     int raw_dy = _thd.selstart.y - _thd.selend.y;
    02524     switch (method) {
    02525       case VPM_FIX_X:
    02526         b = HT_LINE | HT_DIR_Y;
    02527         x = _thd.selstart.x;
    02528         break;
    02529
    02530       case VPM_FIX_Y:
    02531         b = HT_LINE | HT_DIR_X;
    02532         y = _thd.selstart.y;
    02533         break;
    02534
    02535       case VPM_FIX_HORIZONTAL:
    02536         if (dx == -dy) {
    02537           /* We are on a straight horizontal line. Determine the 'rail'
    02538            * to build based the sub tile location. */
    02539           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
    02540         } else {
    02541           /* We are not on a straight line. Determine the rail to build
    02542            * based on whether we are above or below it. */
    02543           b = dx + dy >= (int)TILE_SIZE ? HT_LINE | HT_DIR_HU : HT_LINE | HT_DIR_HL;
    02544
    02545           /* Calculate where a horizontal line through the start point and
    02546            * a vertical line from the selected end point intersect and
    02547            * use that point as the end point. */
    02548           int offset = (raw_dx - raw_dy) / 2;
    02549           x = _thd.selstart.x - (offset & ~TILE_UNIT_MASK);
    02550           y = _thd.selstart.y + (offset & ~TILE_UNIT_MASK);
    02551
    02552           /* 'Build' the last half rail tile if needed */
    02553           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
    02554             if (dx + dy >= (int)TILE_SIZE) {
    02555               x += (dx + dy < 0) ? (int)TILE_SIZE : -(int)TILE_SIZE;
    02556             } else {
    02557               y += (dx + dy < 0) ? (int)TILE_SIZE : -(int)TILE_SIZE;
    02558             }
    02559           }
    02560
    02561           /* Make sure we do not overflow the map! */
    02562           CheckUnderflow(x, y, 1);
    02563           CheckUnderflow(y, x, 1);
    02564           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, 1);
    02565           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, 1);
    02566           assert(x >= 0 && y >= 0 && x <= (int)(MapMaxX() * TILE_SIZE) && y <= (int)(MapMaxY() * TILE_SIZE));
    02567         }
    02568         break;
    02569
    02570       case VPM_FIX_VERTICAL:
    02571         if (dx == dy) {
    02572           /* We are on a straight vertical line. Determine the 'rail'
    02573            * to build based the sub tile location. */
    02574           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02575         } else {
    02576           /* We are not on a straight line. Determine the rail to build
    02577            * based on whether we are left or right from it. */
    02578           b = dx < dy ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02579
    02580           /* Calculate where a vertical line through the start point and
    02581            * a horizontal line from the selected end point intersect and
    02582            * use that point as the end point. */
    02583           int offset = (raw_dx + raw_dy + (int)TILE_SIZE) / 2;
    02584           x = _thd.selstart.x - (offset & ~TILE_UNIT_MASK);
    02585           y = _thd.selstart.y - (offset & ~TILE_UNIT_MASK);
    02586
    02587           /* 'Build' the last half rail tile if needed */
    02588           if ((offset & TILE_UNIT_MASK) > (TILE_SIZE / 2)) {
    02589             if (dx - dy < 0) {
    02590               y += (dx > dy) ? (int)TILE_SIZE : -(int)TILE_SIZE;
    02591             } else {
    02592               x += (dx < dy) ? (int)TILE_SIZE : -(int)TILE_SIZE;
    02593             }
    02594           }
    02595
    02596           /* Make sure we do not overflow the map! */
    02597           CheckUnderflow(x, y, -1);
    02598           CheckUnderflow(y, x, -1);
    02599           CheckOverflow(x, y, (MapMaxX() - 1) * TILE_SIZE, -1);
    02600           CheckOverflow(y, x, (MapMaxY() - 1) * TILE_SIZE, -1);
    02601           assert(x >= 0 && y >= 0 && x <= (int)(MapMaxX() * TILE_SIZE) && y <= (int)(MapMaxY() * TILE_SIZE));
    02602         }
    02603         break;
    02604
    02605       default:
    02606         NOT_REACHED();
    02607     }
    02608   } else if (TileVirtXY(_thd.selstart.x, _thd.selstart.y) == TileVirtXY(x, y)) { // check if we're only within one tile
    02609     if (method & VPM_RAILDIRS) {
    02610       b = GetAutorailHT(x, y);
    02611     } else { // rect for autosignals on one tile
    02612       b = HT_RECT;
    02613     }
    02614   } else if (h == TILE_SIZE) { // Is this in X direction?
    02615     if (dx == (int)TILE_SIZE) { // 2x1 special handling
    02616       b = (Check2x1AutoRail(3)) | HT_LINE;
    02617     } else if (dx == -(int)TILE_SIZE) {
    02618       b = (Check2x1AutoRail(2)) | HT_LINE;
    02619     } else {
    02620       b = HT_LINE | HT_DIR_X;
    02621     }
    02622     y = _thd.selstart.y;
    02623   } else if (w == TILE_SIZE) { // Or Y direction?
    02624     if (dy == (int)TILE_SIZE) { // 2x1 special handling
    02625       b = (Check2x1AutoRail(1)) | HT_LINE;
    02626     } else if (dy == -(int)TILE_SIZE) { // 2x1 other direction
    02627       b = (Check2x1AutoRail(0)) | HT_LINE;
    02628     } else {
    02629       b = HT_LINE | HT_DIR_Y;
    02630     }
    02631     x = _thd.selstart.x;
    02632   } else if (w > h * 2) { // still count as x dir?
    02633     b = HT_LINE | HT_DIR_X;
    02634     y = _thd.selstart.y;
    02635   } else if (h > w * 2) { // still count as y dir?
    02636     b = HT_LINE | HT_DIR_Y;
    02637     x = _thd.selstart.x;
    02638   } else { // complicated direction
    02639     int d = w - h;
    02640     _thd.selend.x = _thd.selend.x & ~TILE_UNIT_MASK;
    02641     _thd.selend.y = _thd.selend.y & ~TILE_UNIT_MASK;
    02642
    02643     /* four cases. */
    02644     if (x > _thd.selstart.x) {
    02645       if (y > _thd.selstart.y) {
    02646         /* south */
    02647         if (d == 0) {
    02648           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02649         } else if (d >= 0) {
    02650           x = _thd.selstart.x + h;
    02651           b = HT_LINE | HT_DIR_VL;
    02652         } else {
    02653           y = _thd.selstart.y + w;
    02654           b = HT_LINE | HT_DIR_VR;
    02655         }
    02656       } else {
    02657         /* west */
    02658         if (d == 0) {
    02659           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
    02660         } else if (d >= 0) {
    02661           x = _thd.selstart.x + h;
    02662           b = HT_LINE | HT_DIR_HL;
    02663         } else {
    02664           y = _thd.selstart.y - w;
    02665           b = HT_LINE | HT_DIR_HU;
    02666         }
    02667       }
    02668     } else {
    02669       if (y > _thd.selstart.y) {
    02670         /* east */
    02671         if (d == 0) {
    02672           b = (x & TILE_UNIT_MASK) + (y & TILE_UNIT_MASK) >= TILE_SIZE ? HT_LINE | HT_DIR_HL : HT_LINE | HT_DIR_HU;
    02673         } else if (d >= 0) {
    02674           x = _thd.selstart.x - h;
    02675           b = HT_LINE | HT_DIR_HU;
    02676         } else {
    02677           y = _thd.selstart.y + w;
    02678           b = HT_LINE | HT_DIR_HL;
    02679         }
    02680       } else {
    02681         /* north */
    02682         if (d == 0) {
    02683           b = (x & TILE_UNIT_MASK) > (y & TILE_UNIT_MASK) ? HT_LINE | HT_DIR_VL : HT_LINE | HT_DIR_VR;
    02684         } else if (d >= 0) {
    02685           x = _thd.selstart.x - h;
    02686           b = HT_LINE | HT_DIR_VR;
    02687         } else {
    02688           y = _thd.selstart.y - w;
    02689           b = HT_LINE | HT_DIR_VL;
    02690         }
    02691       }
    02692     }
    02693   }
    02694
    02695   if (_settings_client.gui.measure_tooltip) {
    02696     TileIndex t0 = TileVirtXY(_thd.selstart.x, _thd.selstart.y);
    02697     TileIndex t1 = TileVirtXY(x, y);
    02698     uint distance = DistanceManhattan(t0, t1) + 1;
    02699     byte index = 0;
    02700     uint64 params[2];
    02701
    02702     if (distance != 1) {
    02703       int heightdiff = CalcHeightdiff(b, distance, t0, t1);
    02704       /* If we are showing a tooltip for horizontal or vertical drags,
    02705        * 2 tiles have a length of 1. To bias towards the ceiling we add
    02706        * one before division. It feels more natural to count 3 lengths as 2 */
    02707       if ((b & HT_DIR_MASK) != HT_DIR_X && (b & HT_DIR_MASK) != HT_DIR_Y) {
    02708         distance = CeilDiv(distance, 2);
    02709       }
    02710
    02711       params[index++] = distance;
    02712       if (heightdiff != 0) params[index++] = heightdiff;
    02713     }
    02714
    02715     ShowMeasurementTooltips(measure_strings_length[index], index, params);
    02716   }
    02717
    02718   _thd.selend.x = x;
    02719   _thd.selend.y = y;
    02720   _thd.next_drawstyle = b;
    02721 }
    02722
    02730 void VpSelectTilesWithMethod(int x, int y, ViewportPlaceMethod method)
    02731 {
    02732   int sx, sy;
    02733   HighLightStyle style;
    02734
    02735   if (x == -1) {
    02736     _thd.selend.x = -1;
    02737     return;
    02738   }
    02739
    02740   /* Special handling of drag in any (8-way) direction */
    02741   if (method & (VPM_RAILDIRS | VPM_SIGNALDIRS)) {
    02742     _thd.selend.x = x;
    02743     _thd.selend.y = y;
    02744     CalcRaildirsDrawstyle(x, y, method);
    02745     return;
    02746   }
    02747
    02748   /* Needed so level-land is placed correctly */
    02749   if ((_thd.next_drawstyle & HT_DRAG_MASK) == HT_POINT) {
    02750     x += TILE_SIZE / 2;
    02751     y += TILE_SIZE / 2;
    02752   }
    02753
    02754   sx = _thd.selstart.x;
    02755   sy = _thd.selstart.y;
    02756
    02757   int limit = 0;
    02758
    02759   switch (method) {
    02760     case VPM_X_OR_Y: // drag in X or Y direction
    02761       if (abs(sy - y) < abs(sx - x)) {
    02762         y = sy;
    02763         style = HT_DIR_X;
    02764       } else {
    02765         x = sx;
    02766         style = HT_DIR_Y;
    02767       }
    02768       goto calc_heightdiff_single_direction;
    02769
    02770     case VPM_X_LIMITED: // Drag in X direction (limited size).
    02771       limit = (_thd.sizelimit - 1) * TILE_SIZE;
    02772       /* FALL THROUGH */
    02773
    02774     case VPM_FIX_X: // drag in Y direction
    02775       x = sx;
    02776       style = HT_DIR_Y;
    02777       goto calc_heightdiff_single_direction;
    02778
    02779     case VPM_Y_LIMITED: // Drag in Y direction (limited size).
    02780       limit = (_thd.sizelimit - 1) * TILE_SIZE;
    02781       /* FALL THROUGH */
    02782
    02783     case VPM_FIX_Y: // drag in X direction
    02784       y = sy;
    02785       style = HT_DIR_X;
    02786
    02787 calc_heightdiff_single_direction:;
    02788       if (limit > 0) {
    02789         x = sx + Clamp(x - sx, -limit, limit);
    02790         y = sy + Clamp(y - sy, -limit, limit);
    02791       }
    02792       if (_settings_client.gui.measure_tooltip) {
    02793         TileIndex t0 = TileVirtXY(sx, sy);
    02794         TileIndex t1 = TileVirtXY(x, y);
    02795         uint distance = DistanceManhattan(t0, t1) + 1;
    02796         byte index = 0;
    02797         uint64 params[2];
    02798
    02799         if (distance != 1) {
    02800           /* With current code passing a HT_LINE style to calculate the height
    02801            * difference is enough. However if/when a point-tool is created
    02802            * with this method, function should be called with new_style (below)
    02803            * instead of HT_LINE | style case HT_POINT is handled specially
    02804            * new_style := (_thd.next_drawstyle & HT_RECT) ? HT_LINE | style : _thd.next_drawstyle; */
    02805           int heightdiff = CalcHeightdiff(HT_LINE | style, 0, t0, t1);
    02806
    02807           params[index++] = distance;
    02808           if (heightdiff != 0) params[index++] = heightdiff;
    02809         }
    02810
    02811         ShowMeasurementTooltips(measure_strings_length[index], index, params);
    02812       }
    02813       break;
    02814
    02815     case VPM_X_AND_Y_LIMITED: // Drag an X by Y constrained rect area.
    02816       limit = (_thd.sizelimit - 1) * TILE_SIZE;
    02817       x = sx + Clamp(x - sx, -limit, limit);
    02818       y = sy + Clamp(y - sy, -limit, limit);
    02819       /* FALL THROUGH */
    02820
    02821     case VPM_X_AND_Y: // drag an X by Y area
    02822       if (_settings_client.gui.measure_tooltip) {
    02823         static const StringID measure_strings_area[] = {
    02824           STR_NULL, STR_NULL, STR_MEASURE_AREA, STR_MEASURE_AREA_HEIGHTDIFF
    02825         };
    02826
    02827         TileIndex t0 = TileVirtXY(sx, sy);
    02828         TileIndex t1 = TileVirtXY(x, y);
    02829         uint dx = Delta(TileX(t0), TileX(t1)) + 1;
    02830         uint dy = Delta(TileY(t0), TileY(t1)) + 1;
    02831         byte index = 0;
    02832         uint64 params[3];
    02833
    02834         /* If dragging an area (eg dynamite tool) and it is actually a single
    02835          * row/column, change the type to 'line' to get proper calculation for height */
    02836         style = (HighLightStyle)_thd.next_drawstyle;
    02837         if (_thd.IsDraggingDiagonal()) {
    02838           /* Determine the "area" of the diagonal dragged selection.
    02839            * We assume the area is the number of tiles along the X
    02840            * edge and the number of tiles along the Y edge. However,
    02841            * multiplying these two numbers does not give the exact
    02842            * number of tiles; basically we are counting the black
    02843            * squares on a chess board and ignore the white ones to
    02844            * make the tile counts at the edges match up. There is no
    02845            * other way to make a proper count though.
    02846            *
    02847            * First convert to the rotated coordinate system. */
    02848           int dist_x = TileX(t0) - TileX(t1);
    02849           int dist_y = TileY(t0) - TileY(t1);
    02850           int a_max = dist_x + dist_y;
    02851           int b_max = dist_y - dist_x;
    02852
    02853           /* Now determine the size along the edge, but due to the
    02854            * chess board principle this counts double. */
    02855           a_max = abs(a_max + (a_max > 0 ? 2 : -2)) / 2;
    02856           b_max = abs(b_max + (b_max > 0 ? 2 : -2)) / 2;
    02857
    02858           /* We get a 1x1 on normal 2x1 rectangles, due to it being
    02859            * a seen as two sides. As the result for actual building
    02860            * will be the same as non-diagonal dragging revert to that
    02861            * behaviour to give it a more normally looking size. */
    02862           if (a_max != 1 || b_max != 1) {
    02863             dx = a_max;
    02864             dy = b_max;
    02865           }
    02866         } else if (style & HT_RECT) {
    02867           if (dx == 1) {
    02868             style = HT_LINE | HT_DIR_Y;
    02869           } else if (dy == 1) {
    02870             style = HT_LINE | HT_DIR_X;
    02871           }
    02872         }
    02873
    02874         if (dx != 1 || dy != 1) {
    02875           int heightdiff = CalcHeightdiff(style, 0, t0, t1);
    02876
    02877           params[index++] = dx - (style & HT_POINT ? 1 : 0);
    02878           params[index++] = dy - (style & HT_POINT ? 1 : 0);
    02879           if (heightdiff != 0) params[index++] = heightdiff;
    02880         }
    02881
    02882         ShowMeasurementTooltips(measure_strings_area[index], index, params);
    02883       }
    02884       break;
    02885
    02886     default: NOT_REACHED();
    02887   }
    02888
    02889   _thd.selend.x = x;
    02890   _thd.selend.y = y;
    02891 }
    02892
    02897 EventState VpHandlePlaceSizingDrag()
    02898 {
    02899   if (_special_mouse_mode != WSM_SIZING) return ES_NOT_HANDLED;
    02900
    02901   /* stop drag mode if the window has been closed */
    02902   Window *w = _thd.GetCallbackWnd();
    02903   if (w == NULL) {
    02904     ResetObjectToPlace();
    02905     return ES_HANDLED;
    02906   }
    02907
    02908   /* while dragging execute the drag procedure of the corresponding window (mostly VpSelectTilesWithMethod() ) */
    02909   if (_left_button_down) {
    02910     w->OnPlaceDrag(_thd.select_method, _thd.select_proc, GetTileBelowCursor());
    02911     return ES_HANDLED;
    02912   }
    02913
    02914   /* mouse button released..
    02915    * keep the selected tool, but reset it to the original mode. */
    02916   _special_mouse_mode = WSM_NONE;
    02917   HighLightStyle others = _thd.place_mode & ~(HT_DRAG_MASK | HT_DIR_MASK);
    02918   if ((_thd.next_drawstyle & HT_DRAG_MASK) == HT_RECT) {
    02919     _thd.place_mode = HT_RECT | others;
    02920   } else if (_thd.select_method & VPM_SIGNALDIRS) {
    02921     _thd.place_mode = HT_RECT | others;
    02922   } else if (_thd.select_method & VPM_RAILDIRS) {
    02923     _thd.place_mode = (_thd.select_method & ~VPM_RAILDIRS) ? _thd.next_drawstyle : (HT_RAIL | others);
    02924   } else {
    02925     _thd.place_mode = HT_POINT | others;
    02926   }
    02927   SetTileSelectSize(1, 1);
    02928
    02929   w->OnPlaceMouseUp(_thd.select_method, _thd.select_proc, _thd.selend, TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y));
    02930
    02931   return ES_HANDLED;
    02932 }
    02933
    02934 void SetObjectToPlaceWnd(CursorID icon, PaletteID pal, HighLightStyle mode, Window *w)
    02935 {
    02936   SetObjectToPlace(icon, pal, mode, w->window_class, w->window_number);
    02937 }
    02938
    02939 #include "table/animcursors.h"
    02940
    02941 void SetObjectToPlace(CursorID icon, PaletteID pal, HighLightStyle mode, WindowClass window_class, WindowNumber window_num)
    02942 {
    02943   if (_thd.window_class != WC_INVALID) {
    02944     /* Undo clicking on button and drag & drop */
    02945     Window *w = _thd.GetCallbackWnd();
    02946     /* Call the abort function, but set the window class to something
    02947      * that will never be used to avoid infinite loops. Setting it to
    02948      * the 'next' window class must not be done because recursion into
    02949      * this function might in some cases reset the newly set object to
    02950      * place or not properly reset the original selection. */
    02951     _thd.window_class = WC_INVALID;
    02952     if (w != NULL) w->OnPlaceObjectAbort();
    02953   }
    02954
    02955   /* Mark the old selection dirty, in case the selection shape or colour changes */
    02956   if ((_thd.drawstyle & HT_DRAG_MASK) != HT_NONE) SetSelectionTilesDirty();
    02957
    02958   SetTileSelectSize(1, 1);
    02959
    02960   _thd.make_square_red = false;
    02961
    02962   if (mode == HT_DRAG) { // HT_DRAG is for dragdropping trains in the depot window
    02963     mode = HT_NONE;
    02964     _special_mouse_mode = WSM_DRAGDROP;
    02965   } else {
    02966     _special_mouse_mode = WSM_NONE;
    02967   }
    02968
    02969   _thd.place_mode = mode;
    02970   _thd.window_class = window_class;
    02971   _thd.window_number = window_num;
    02972
    02973   if ((mode & HT_DRAG_MASK) == HT_SPECIAL) { // special tools, like tunnels or docks start with presizing mode
    02974     VpStartPreSizing();
    02975   }
    02976
    02977   if ((icon & ANIMCURSOR_FLAG) != 0) {
    02978     SetAnimatedMouseCursor(_animcursors[icon & ~ANIMCURSOR_FLAG]);
    02979   } else {
    02980     SetMouseCursor(icon, pal);
    02981   }
    02982
    02983 }
    02984
    02985 void ResetObjectToPlace()
    02986 {
    02987   SetObjectToPlace(SPR_CURSOR_MOUSE, PAL_NONE, HT_NONE, WC_MAIN_WINDOW, 0);
    02988 }
    02989
    02990 Point GetViewportStationMiddle(const ViewPort *vp, const Station *st)
    02991 {
    02992   int x = TileX(st->xy) * TILE_SIZE;
    02993   int y = TileY(st->xy) * TILE_SIZE;
    02994   int z = GetSlopePixelZ(Clamp(x, 0, MapSizeX() * TILE_SIZE - 1), Clamp(y, 0, MapSizeY() * TILE_SIZE - 1));
    02995
    02996   Point p = RemapCoords(x, y, z);
    02997   p.x = UnScaleByZoom(p.x - vp->virtual_left, vp->zoom) + vp->left;
    02998   p.y = UnScaleByZoom(p.y - vp->virtual_top, vp->zoom) + vp->top;
    02999   return p;
    03000 }