Function LoadSpriteV1

src/spriteloader/grf.cpp:215–254

}

static ZoomLevels LoadSpriteV1(SpriteLoader::SpriteCollection &sprite, SpriteFile &file, size_t file_pos, SpriteType sprite_type, bool load_32bpp, ZoomLevels &avail_8bpp)
{
	/* Check the requested colour depth. */
	if (load_32bpp) return {};

	/* Open the right file and go to the correct position */
	file.SeekTo(file_pos, SEEK_SET);

	/* Read the size and type */
	int num = file.ReadWord();
	uint8_t type = file.ReadByte();

	/* Type 0xFF indicates either a colourmap or some other non-sprite info; we do not handle them here */
	if (type == 0xFF) return {};

	ZoomLevel zoom_lvl = (sprite_type != SpriteType::MapGen) ? ZoomLevel::Normal : ZoomLevel::Min;
	auto &dest_sprite = sprite[zoom_lvl];

	dest_sprite.height = file.ReadByte();
	dest_sprite.width = file.ReadWord();
	dest_sprite.x_offs = file.ReadWord();
	dest_sprite.y_offs = file.ReadWord();
	dest_sprite.colours = SpriteComponent::Palette;

	if (dest_sprite.width > INT16_MAX) {
		WarnCorruptSprite(file, file_pos, __LINE__);
		return {};
	}

	/* 0x02 indicates it is a compressed sprite, so we can't rely on 'num' to be valid.
	 * In case it is uncompressed, the size is 'num' - 8 (header-size). */
	num = (type & 0x02) ? dest_sprite.width * dest_sprite.height : num - 8;

	if (DecodeSingleSprite(&dest_sprite, file, file_pos, sprite_type, num, type, zoom_lvl, SpriteComponent::Palette, 1)) {
		avail_8bpp.Set(zoom_lvl);
		return avail_8bpp;
	}

	return {};
}

static ZoomLevels LoadSpriteV2(SpriteLoader::SpriteCollection &sprite, SpriteFile &file, size_t file_pos, SpriteType sprite_type, bool load_32bpp, SpriteCacheCtrlFlags control_flags, ZoomLevels &avail_8bpp, ZoomLevels &avail_32bpp)
{