# sprite.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
    00012 #include "stdafx.h"
    00013 #include "sprite.h"
    00014 #include "viewport_func.h"
    00015 #include "landscape.h"
    00016 #include "spritecache.h"
    00017 #include "core/alloc_func.hpp"
    00018 #include "core/mem_func.hpp"
    00019
    00020
    00031 void DrawCommonTileSeq(const TileInfo *ti, const DrawTileSprites *dts, TransparencyOption to, int32 orig_offset, uint32 newgrf_offset, PaletteID default_palette, bool child_offset_is_unsigned)
    00032 {
    00033   bool parent_sprite_encountered = false;
    00034   const DrawTileSeqStruct *dtss;
    00035   bool skip_childs = false;
    00036   foreach_draw_tile_seq(dtss, dts->seq) {
    00037     SpriteID image = dtss->image.sprite;
    00038     PaletteID pal = dtss->image.pal;
    00039
    00040     if (skip_childs) {
    00041       if (!dtss->IsParentSprite()) continue;
    00042       skip_childs = false;
    00043     }
    00044
    00045     /* TTD sprite 0 means no sprite */
    00046     if (GB(image, 0, SPRITE_WIDTH) == 0 && !HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
    00047       skip_childs = dtss->IsParentSprite();
    00048       continue;
    00049     }
    00050
    00051     /* Stop drawing sprite sequence once we meet a sprite that doesn't have to be opaque */
    00052     if (IsInvisibilitySet(to) && !HasBit(image, SPRITE_MODIFIER_OPAQUE)) return;
    00053
    00054     image += (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? newgrf_offset : orig_offset);
    00055     if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += newgrf_offset;
    00056
    00057     pal = SpriteLayoutPaletteTransform(image, pal, default_palette);
    00058
    00059     if (dtss->IsParentSprite()) {
    00060       parent_sprite_encountered = true;
    00061       AddSortableSpriteToDraw(
    00062         image, pal,
    00063         ti->x + dtss->delta_x, ti->y + dtss->delta_y,
    00064         dtss->size_x, dtss->size_y,
    00065         dtss->size_z, ti->z + dtss->delta_z,
    00066         !HasBit(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(to)
    00067       );
    00068     } else {
    00069       int offs_x = child_offset_is_unsigned ? (uint8)dtss->delta_x : dtss->delta_x;
    00070       int offs_y = child_offset_is_unsigned ? (uint8)dtss->delta_y : dtss->delta_y;
    00071       bool transparent = !HasBit(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(to);
    00072       if (parent_sprite_encountered) {
    00073         AddChildSpriteScreen(image, pal, offs_x, offs_y, transparent);
    00074       } else {
    00075         if (transparent) {
    00076           SetBit(image, PALETTE_MODIFIER_TRANSPARENT);
    00077           pal = PALETTE_TO_TRANSPARENT;
    00078         }
    00079         DrawGroundSprite(image, pal, NULL, offs_x, offs_y);
    00080       }
    00081     }
    00082   }
    00083 }
    00084
    00095 void DrawCommonTileSeqInGUI(int x, int y, const DrawTileSprites *dts, int32 orig_offset, uint32 newgrf_offset, PaletteID default_palette, bool child_offset_is_unsigned)
    00096 {
    00097   const DrawTileSeqStruct *dtss;
    00098   Point child_offset = {0, 0};
    00099
    00100   bool skip_childs = false;
    00101   foreach_draw_tile_seq(dtss, dts->seq) {
    00102     SpriteID image = dtss->image.sprite;
    00103     PaletteID pal = dtss->image.pal;
    00104
    00105     if (skip_childs) {
    00106       if (!dtss->IsParentSprite()) continue;
    00107       skip_childs = false;
    00108     }
    00109
    00110     /* TTD sprite 0 means no sprite */
    00111     if (GB(image, 0, SPRITE_WIDTH) == 0 && !HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
    00112       skip_childs = dtss->IsParentSprite();
    00113       continue;
    00114     }
    00115
    00116     image += (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? newgrf_offset : orig_offset);
    00117     if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += newgrf_offset;
    00118
    00119     pal = SpriteLayoutPaletteTransform(image, pal, default_palette);
    00120
    00121     if (dtss->IsParentSprite()) {
    00122       Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z);
    00123       DrawSprite(image, pal, x + pt.x, y + pt.y);
    00124
    00125       const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL);
    00126       child_offset.x = pt.x + spr->x_offs;
    00127       child_offset.y = pt.y + spr->y_offs;
    00128     } else {
    00129       int offs_x = child_offset_is_unsigned ? (uint8)dtss->delta_x : dtss->delta_x;
    00130       int offs_y = child_offset_is_unsigned ? (uint8)dtss->delta_y : dtss->delta_y;
    00131       DrawSprite(image, pal, x + child_offset.x + offs_x, y + child_offset.y + offs_y);
    00132     }
    00133   }
    00134 }