Function DrawCommonTileSeqInGUI

src/sprite.cpp:86–124

* 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 W

 * @param child_offset_is_unsigned Whether child sprite offsets are interpreted signed or unsigned
 */
void DrawCommonTileSeqInGUI(int x, int y, const DrawTileSprites *dts, int32_t orig_offset, uint32_t newgrf_offset, PaletteID default_palette, bool child_offset_is_unsigned)
{
	Point child_offset = {0, 0};

	bool skip_childs = false;
	for (const DrawTileSeqStruct &dtss : dts->GetSequence()) {
		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.origin.x, dtss.origin.y, dtss.origin.z);
			DrawSprite(image, pal, x + UnScaleGUI(pt.x), y + UnScaleGUI(pt.y));

			const Sprite *spr = GetSprite(image & SPRITE_MASK, SpriteType::Normal);
			child_offset.x = UnScaleGUI(pt.x + spr->x_offs);
			child_offset.y = UnScaleGUI(pt.y + spr->y_offs);
		} else {
			int offs_x = child_offset_is_unsigned ? static_cast<uint8_t>(dtss.origin.x) : dtss.origin.x;
			int offs_y = child_offset_is_unsigned ? static_cast<uint8_t>(dtss.origin.y) : dtss.origin.y;
			DrawSprite(image, pal, x + child_offset.x + ScaleSpriteTrad(offs_x), y + child_offset.y + ScaleSpriteTrad(offs_y));
		}
	}
}