# sprite.cpp

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    00001 /* $Id: sprite.cpp 18846 2010-01-17 15:05:25Z frosch $ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
    00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
    00008  */
    00009
    00012 #include "stdafx.h"
    00013 #include "sprite.h"
    00014 #include "tile_cmd.h"
    00015 #include "viewport_func.h"
    00016 #include "landscape.h"
    00017 #include "spritecache.h"
    00018
    00019 #include "table/sprites.h"
    00020
    00031 void DrawCommonTileSeq(const TileInfo *ti, const DrawTileSprites *dts, TransparencyOption to, int32 orig_offset, uint32 newgrf_offset, SpriteID default_palette, bool child_offset_is_unsigned)
    00032 {
    00033   const DrawTileSeqStruct *dtss;
    00034   foreach_draw_tile_seq(dtss, dts->seq) {
    00035     SpriteID image = dtss->image.sprite;
    00036
    00037     /* TTD sprite 0 means no sprite */
    00038     if (GB(image, 0, SPRITE_WIDTH) == 0 && !HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) continue;
    00039
    00040     /* Stop drawing sprite sequence once we meet a sprite that doesn't have to be opaque */
    00041     if (IsInvisibilitySet(to) && !HasBit(image, SPRITE_MODIFIER_OPAQUE)) return;
    00042
    00043     image += (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? newgrf_offset : orig_offset);
    00044
    00045     SpriteID pal = SpriteLayoutPaletteTransform(image, dtss->image.pal, default_palette);
    00046
    00047     if ((byte)dtss->delta_z != 0x80) {
    00048       AddSortableSpriteToDraw(
    00049         image, pal,
    00050         ti->x + dtss->delta_x, ti->y + dtss->delta_y,
    00051         dtss->size_x, dtss->size_y,
    00052         dtss->size_z, ti->z + dtss->delta_z,
    00053         !HasBit(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(to)
    00054       );
    00055     } else {
    00056       int offs_x = child_offset_is_unsigned ? (uint8)dtss->delta_x : dtss->delta_x;
    00057       int offs_y = child_offset_is_unsigned ? (uint8)dtss->delta_y : dtss->delta_y;
    00058       AddChildSpriteScreen(image, pal, offs_x, offs_y, !HasBit(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(to));
    00059     }
    00060   }
    00061 }
    00062
    00073 void DrawCommonTileSeqInGUI(int x, int y, const DrawTileSprites *dts, int32 orig_offset, uint32 newgrf_offset, SpriteID default_palette, bool child_offset_is_unsigned)
    00074 {
    00075   const DrawTileSeqStruct *dtss;
    00076   Point child_offset = {0, 0};
    00077
    00078   foreach_draw_tile_seq(dtss, dts->seq) {
    00079     SpriteID image = dtss->image.sprite;
    00080
    00081     /* TTD sprite 0 means no sprite */
    00082     if (GB(image, 0, SPRITE_WIDTH) == 0 && !HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) continue;
    00083
    00084     image += (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? newgrf_offset : orig_offset);
    00085
    00086     SpriteID pal = SpriteLayoutPaletteTransform(image, dtss->image.pal, default_palette);
    00087
    00088     if ((byte)dtss->delta_z != 0x80) {
    00089       Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z);
    00090       DrawSprite(image, pal, x + pt.x, y + pt.y);
    00091
    00092       const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
    00093       child_offset.x = pt.x + spr->x_offs;
    00094       child_offset.y = pt.y + spr->y_offs;
    00095     } else {
    00096       int offs_x = child_offset_is_unsigned ? (uint8)dtss->delta_x : dtss->delta_x;
    00097       int offs_y = child_offset_is_unsigned ? (uint8)dtss->delta_y : dtss->delta_y;
    00098       DrawSprite(image, pal, x + child_offset.x + offs_x, y + child_offset.y + offs_y);
    00099     }
    00100   }
    00101 }