SchrodingersChess/sprites.cpp

#include "sprites.hpp"

SDL_Surface* Sprite::sheet = nullptr;

int Sprite::get(Piece piece, SDL_Surface* dest_surface)
{
    return get(piece.get_team(), piece.get_type(), piece.get_vis(),  dest_surface);
}

int Sprite::get(Team team, Type type, Visibility vis, SDL_Surface* dest_surface)
{
    if (nullptr == sheet)
    {
        load();
    }

    if (NO_TYPE == type || NO_TEAM == team || VIS_NONE == vis)
    {
        return -1;
    }

    //Offsetting magic to get the right image of the piece
    SDL_Rect dest_rect{0,0,SPRITE_SIZE,SPRITE_SIZE};
    SDL_Rect src_rect{type*SPRITE_SIZE,team*SPRITE_SIZE+vis*2*SPRITE_SIZE,SPRITE_SIZE,SPRITE_SIZE};
    SDL_BlitSurface(sheet, &src_rect, dest_surface, &dest_rect);

    return 0;
}

void Sprite::close()
{
    if (nullptr != sheet)
    {
        SDL_FreeSurface(sheet);
        sheet = nullptr;
    }
}

void Sprite::load()
{
    close();
    sheet = SDL_LoadBMP("Chess_Pieces_Sprite.bmp");
    SDL_SetColorKey(sheet, SDL_TRUE, SDL_MapRGB(sheet->format, 0xFF, 0, 0xFF));
}