/* $Id$ */ /* * This file is part of OpenTTD. * 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. * 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. * 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/>. */ /** @file sprite.cpp Handling of sprites */ #include "stdafx.h" #include "sprite.h" #include "viewport_func.h" #include "landscape.h" #include "spritecache.h" #include "core/alloc_func.hpp" #include "core/mem_func.hpp" /** * Draws a tile sprite sequence. * @param ti The tile to draw on * @param dts Sprite and subsprites to draw * @param to The transparancy bit that toggles drawing of these sprites * @param orig_offset Sprite-Offset for original sprites * @param newgrf_offset Sprite-Offset for NewGRF defined sprites * @param default_palette The default recolour sprite to use (typically company colour) * @param child_offset_is_unsigned Whether child sprite offsets are interpreted signed or unsigned */ void DrawCommonTileSeq(const TileInfo *ti, const DrawTileSprites *dts, TransparencyOption to, int32 orig_offset, uint32 newgrf_offset, PaletteID default_palette, bool child_offset_is_unsigned) { bool parent_sprite_encountered = false; const DrawTileSeqStruct *dtss; bool skip_childs = false; foreach_draw_tile_seq(dtss, dts->seq) { SpriteID image = dtss->image.sprite; PaletteID pal = dtss->image.pal; if (skip_childs) { if (!dtss->IsParentSprite()) continue; skip_childs = false; } /* TTD sprite 0 means no sprite */ if (GB(image, 0, SPRITE_WIDTH) == 0 && !HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) { skip_childs = dtss->IsParentSprite(); continue; } /* Stop drawing sprite sequence once we meet a sprite that doesn't have to be opaque */ if (IsInvisibilitySet(to) && !HasBit(image, SPRITE_MODIFIER_OPAQUE)) return; image += (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? newgrf_offset : orig_offset); if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += newgrf_offset; pal = SpriteLayoutPaletteTransform(image, pal, default_palette); if (dtss->IsParentSprite()) { parent_sprite_encountered = true; AddSortableSpriteToDraw( image, pal, ti->x + dtss->delta_x, ti->y + dtss->delta_y, dtss->size_x, dtss->size_y, dtss->size_z, ti->z + dtss->delta_z, !HasBit(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(to) ); } else { int offs_x = child_offset_is_unsigned ? (uint8)dtss->delta_x : dtss->delta_x; int offs_y = child_offset_is_unsigned ? (uint8)dtss->delta_y : dtss->delta_y; bool transparent = !HasBit(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(to); if (parent_sprite_encountered) { AddChildSpriteScreen(image, pal, offs_x, offs_y, transparent); } else { if (transparent) { SetBit(image, PALETTE_MODIFIER_TRANSPARENT); pal = PALETTE_TO_TRANSPARENT; } DrawGroundSprite(image, pal, NULL, offs_x, offs_y); } } } } /** * Draws a tile sprite sequence in the GUI * @param x X position to draw to * @param y Y position to draw to * @param dts Sprite and subsprites to draw * @param orig_offset Sprite-Offset for original sprites * @param newgrf_offset Sprite-Offset for NewGRF defined sprites * @param default_palette The default recolour sprite to use (typically company colour) * @param child_offset_is_unsigned Whether child sprite offsets are interpreted signed or unsigned */ void DrawCommonTileSeqInGUI(int x, int y, const DrawTileSprites *dts, int32 orig_offset, uint32 newgrf_offset, PaletteID default_palette, bool child_offset_is_unsigned) { const DrawTileSeqStruct *dtss; Point child_offset = {0, 0}; bool skip_childs = false; foreach_draw_tile_seq(dtss, dts->seq) { SpriteID image = dtss->image.sprite; PaletteID pal = dtss->image.pal; if (skip_childs) { if (!dtss->IsParentSprite()) continue; skip_childs = false; } /* TTD sprite 0 means no sprite */ if (GB(image, 0, SPRITE_WIDTH) == 0 && !HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) { skip_childs = dtss->IsParentSprite(); continue; } image += (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? newgrf_offset : orig_offset); if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += newgrf_offset; pal = SpriteLayoutPaletteTransform(image, pal, default_palette); if (dtss->IsParentSprite()) { Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z); DrawSprite(image, pal, x + pt.x, y + pt.y); const Sprite *spr = GetSprite(image & SPRITE_MASK, ST_NORMAL); child_offset.x = pt.x + spr->x_offs; child_offset.y = pt.y + spr->y_offs; } else { int offs_x = child_offset_is_unsigned ? (uint8)dtss->delta_x : dtss->delta_x; int offs_y = child_offset_is_unsigned ? (uint8)dtss->delta_y : dtss->delta_y; DrawSprite(image, pal, x + child_offset.x + offs_x, y + child_offset.y + offs_y); } } }