OpenTTD
sprite.cpp
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1 /* $Id: sprite.cpp 27134 2015-02-01 20:54:24Z frosch $ */
2 
3 /*
4  * This file is part of OpenTTD.
5  * 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.
6  * 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.
7  * 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/>.
8  */
9 
12 #include "stdafx.h"
13 #include "sprite.h"
14 #include "viewport_func.h"
15 #include "landscape.h"
16 #include "spritecache.h"
17 #include "zoom_func.h"
18 
19 #include "safeguards.h"
20 
21 
32 void DrawCommonTileSeq(const TileInfo *ti, const DrawTileSprites *dts, TransparencyOption to, int32 orig_offset, uint32 newgrf_offset, PaletteID default_palette, bool child_offset_is_unsigned)
33 {
34  bool parent_sprite_encountered = false;
35  const DrawTileSeqStruct *dtss;
36  bool skip_childs = false;
37  foreach_draw_tile_seq(dtss, dts->seq) {
38  SpriteID image = dtss->image.sprite;
39  PaletteID pal = dtss->image.pal;
40 
41  if (skip_childs) {
42  if (!dtss->IsParentSprite()) continue;
43  skip_childs = false;
44  }
45 
46  /* TTD sprite 0 means no sprite */
47  if ((GB(image, 0, SPRITE_WIDTH) == 0 && !HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) ||
49  skip_childs = dtss->IsParentSprite();
50  continue;
51  }
52 
53  image += (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? newgrf_offset : orig_offset);
54  if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += newgrf_offset;
55 
56  pal = SpriteLayoutPaletteTransform(image, pal, default_palette);
57 
58  if (dtss->IsParentSprite()) {
59  parent_sprite_encountered = true;
61  image, pal,
62  ti->x + dtss->delta_x, ti->y + dtss->delta_y,
63  dtss->size_x, dtss->size_y,
64  dtss->size_z, ti->z + dtss->delta_z,
66  );
67  } else {
68  int offs_x = child_offset_is_unsigned ? (uint8)dtss->delta_x : dtss->delta_x;
69  int offs_y = child_offset_is_unsigned ? (uint8)dtss->delta_y : dtss->delta_y;
70  bool transparent = !HasBit(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(to);
71  if (parent_sprite_encountered) {
72  AddChildSpriteScreen(image, pal, offs_x, offs_y, transparent);
73  } else {
74  if (transparent) {
77  }
78  DrawGroundSprite(image, pal, NULL, offs_x, offs_y);
79  }
80  }
81  }
82 }
83 
94 void DrawCommonTileSeqInGUI(int x, int y, const DrawTileSprites *dts, int32 orig_offset, uint32 newgrf_offset, PaletteID default_palette, bool child_offset_is_unsigned)
95 {
96  const DrawTileSeqStruct *dtss;
97  Point child_offset = {0, 0};
98 
99  bool skip_childs = false;
100  foreach_draw_tile_seq(dtss, dts->seq) {
101  SpriteID image = dtss->image.sprite;
102  PaletteID pal = dtss->image.pal;
103 
104  if (skip_childs) {
105  if (!dtss->IsParentSprite()) continue;
106  skip_childs = false;
107  }
108 
109  /* TTD sprite 0 means no sprite */
110  if (GB(image, 0, SPRITE_WIDTH) == 0 && !HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
111  skip_childs = dtss->IsParentSprite();
112  continue;
113  }
114 
115  image += (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? newgrf_offset : orig_offset);
116  if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += newgrf_offset;
117 
118  pal = SpriteLayoutPaletteTransform(image, pal, default_palette);
119 
120  if (dtss->IsParentSprite()) {
121  Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z);
122  DrawSprite(image, pal, x + UnScaleGUI(pt.x), y + UnScaleGUI(pt.y));
123 
124  const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
125  child_offset.x = UnScaleGUI(pt.x + spr->x_offs);
126  child_offset.y = UnScaleGUI(pt.y + spr->y_offs);
127  } else {
128  int offs_x = child_offset_is_unsigned ? (uint8)dtss->delta_x : dtss->delta_x;
129  int offs_y = child_offset_is_unsigned ? (uint8)dtss->delta_y : dtss->delta_y;
130  DrawSprite(image, pal, x + child_offset.x + ScaleGUITrad(offs_x), y + child_offset.y + ScaleGUITrad(offs_y));
131  }
132  }
133 }