src/sprite.h

   1 /*
   2  * This file is part of OpenTTD.
   3  * 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.
   4  * 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.
   5  * 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/>.
   6  */
   7
   8 /** @file sprite.h Base for drawing complex sprites. */
   9
  10 #ifndef SPRITE_H
  11 #define SPRITE_H
  12
  13 #include "transparency.h"
  14
  15 #include "table/sprites.h"
  16
  17 #define GENERAL_SPRITE_COLOUR(colour) ((colour) + PALETTE_RECOLOUR_START)
  18 #define COMPANY_SPRITE_COLOUR(owner) (GENERAL_SPRITE_COLOUR(_company_colours[owner]))
  19
  20 /* The following describes bunch of sprites to be drawn together in a single 3D
  21  * bounding box. Used especially for various multi-sprite buildings (like
  22  * depots or stations): */
  23
  24 /** A tile child sprite and palette to draw for stations etc, with 3D bounding box */
  25 struct DrawTileSeqStruct {
  26         int8 delta_x; ///< \c 0x80 is sequence terminator
  27         int8 delta_y;
  28         int8 delta_z; ///< \c 0x80 identifies child sprites
  29         byte size_x;
  30         byte size_y;
  31         byte size_z;
  32         PalSpriteID image;
  33
  34         /** Make this struct a sequence terminator. */
  35         void MakeTerminator()
  36         {
  37                 this->delta_x = (int8)0x80;
  38         }
  39
  40         /** Check whether this is a sequence terminator. */
  41         bool IsTerminator() const
  42         {
  43                 return (byte)this->delta_x == 0x80;
  44         }
  45
  46         /** Check whether this is a parent sprite with a boundingbox. */
  47         bool IsParentSprite() const
  48         {
  49                 return (byte)this->delta_z != 0x80;
  50         }
  51 };
  52
  53 /**
  54  * Ground palette sprite of a tile, together with its sprite layout.
  55  * This struct is used for static sprite layouts in the code.
  56  * For allocated ones from NewGRF see #NewGRFSpriteLayout.
  57  */
  58 struct DrawTileSprites {
  59         PalSpriteID ground;           ///< Palette and sprite for the ground
  60         const DrawTileSeqStruct *seq; ///< Array of child sprites. Terminated with a terminator entry
  61 };
  62
  63 /**
  64  * This structure is the same for both Industries and Houses.
  65  * Buildings here reference a general type of construction
  66  */
  67 struct DrawBuildingsTileStruct {
  68         PalSpriteID ground;
  69         PalSpriteID building;
  70         byte subtile_x;
  71         byte subtile_y;
  72         byte width;
  73         byte height;
  74         byte dz;
  75         byte draw_proc;  // this allows to specify a special drawing procedure.
  76 };
  77
  78 /** Iterate through all DrawTileSeqStructs in DrawTileSprites. */
  79 #define foreach_draw_tile_seq(idx, list) for (idx = list; !idx->IsTerminator(); idx++)
  80
  81 void DrawCommonTileSeq(const struct TileInfo *ti, const DrawTileSprites *dts, TransparencyOption to, int32 orig_offset, uint32 newgrf_offset, PaletteID default_palette, bool child_offset_is_unsigned);
  82 void DrawCommonTileSeqInGUI(int x, int y, const DrawTileSprites *dts, int32 orig_offset, uint32 newgrf_offset, PaletteID default_palette, bool child_offset_is_unsigned);
  83
  84 /**
  85  * Draw tile sprite sequence on tile with railroad specifics.
  86  * @param total_offset Spriteoffset from normal rail to current railtype.
  87  * @param newgrf_offset Startsprite of the Action1 to use.
  88  */
  89 static inline void DrawRailTileSeq(const struct TileInfo *ti, const DrawTileSprites *dts, TransparencyOption to, int32 total_offset, uint32 newgrf_offset, PaletteID default_palette)
  90 {
  91         DrawCommonTileSeq(ti, dts, to, total_offset, newgrf_offset, default_palette, false);
  92 }
  93
  94 /**
  95  * Draw tile sprite sequence in GUI with railroad specifics.
  96  * @param total_offset Spriteoffset from normal rail to current railtype.
  97  * @param newgrf_offset Startsprite of the Action1 to use.
  98  */
  99 static inline void DrawRailTileSeqInGUI(int x, int y, const DrawTileSprites *dts, int32 total_offset, uint32 newgrf_offset, PaletteID default_palette)
 100 {
 101         DrawCommonTileSeqInGUI(x, y, dts, total_offset, newgrf_offset, default_palette, false);
 102 }
 103
 104 /**
 105  * Draw TTD sprite sequence on tile.
 106  */
 107 static inline void DrawOrigTileSeq(const struct TileInfo *ti, const DrawTileSprites *dts, TransparencyOption to, PaletteID default_palette)
 108 {
 109         DrawCommonTileSeq(ti, dts, to, 0, 0, default_palette, false);
 110 }
 111
 112 /**
 113  * Draw TTD sprite sequence in GUI.
 114  */
 115 static inline void DrawOrigTileSeqInGUI(int x, int y, const DrawTileSprites *dts, PaletteID default_palette)
 116 {
 117         DrawCommonTileSeqInGUI(x, y, dts, 0, 0, default_palette, false);
 118 }
 119
 120 /**
 121  * Draw NewGRF industrytile or house sprite layout
 122  * @param stage Sprite inside the Action1 spritesets to use, i.e. construction stage.
 123  */
 124 static inline void DrawNewGRFTileSeq(const struct TileInfo *ti, const DrawTileSprites *dts, TransparencyOption to, uint32 stage, PaletteID default_palette)
 125 {
 126         DrawCommonTileSeq(ti, dts, to, 0, stage, default_palette, true);
 127 }
 128
 129 /**
 130  * Draw NewGRF object in GUI
 131  * @param stage Sprite inside the Action1 spritesets to use, i.e. construction stage.
 132  */
 133 static inline void DrawNewGRFTileSeqInGUI(int x, int y, const DrawTileSprites *dts, uint32 stage, PaletteID default_palette)
 134 {
 135         DrawCommonTileSeqInGUI(x, y, dts, 0, stage, default_palette, true);
 136 }
 137
 138 /**
 139  * Applies PALETTE_MODIFIER_TRANSPARENT and PALETTE_MODIFIER_COLOUR to a palette entry of a sprite layout entry
 140  * @note for ground sprites use #GroundSpritePaletteTransform
 141  * @note Not useable for OTTD internal spritelayouts from table/xxx_land.h as PALETTE_MODIFIER_TRANSPARENT is only set
 142  *       when to use the default palette.
 143  *
 144  * @param image The sprite to draw
 145  * @param pal The palette from the sprite layout
 146  * @param default_pal The default recolour sprite to use (typically company colour resp. random industry/house colour)
 147  * @return The palette to use
 148  */
 149 static inline PaletteID SpriteLayoutPaletteTransform(SpriteID image, PaletteID pal, PaletteID default_pal)
 150 {
 151         if (HasBit(image, PALETTE_MODIFIER_TRANSPARENT) || HasBit(image, PALETTE_MODIFIER_COLOUR)) {
 152                 return (pal != 0 ? pal : default_pal);
 153         } else {
 154                 return PAL_NONE;
 155         }
 156 }
 157
 158 /**
 159  * Applies PALETTE_MODIFIER_COLOUR to a palette entry of a ground sprite
 160  * @note Not useable for OTTD internal spritelayouts from table/xxx_land.h as PALETTE_MODIFIER_TRANSPARENT is only set
 161  *       when to use the default palette.
 162  *
 163  * @param image The sprite to draw
 164  * @param pal The palette from the sprite layout
 165  * @param default_pal The default recolour sprite to use (typically company colour resp. random industry/house colour)
 166  * @return The palette to use
 167  */
 168 static inline PaletteID GroundSpritePaletteTransform(SpriteID image, PaletteID pal, PaletteID default_pal)
 169 {
 170         if (HasBit(image, PALETTE_MODIFIER_COLOUR)) {
 171                 return (pal != 0 ? pal : default_pal);
 172         } else {
 173                 return PAL_NONE;
 174         }
 175 }
 176
 177 #endif /* SPRITE_H */