tile.cpp as of 2024-04-12

#include <tile.hpp>

using namespace kit;



void Scene::drawBg(){
  if(bmp_bg == nullptr) return;
  shape::point sizeBmp = bmp_bg->getSize();
  if(sizeBmp.x<1 || sizeBmp.y<1) return;


  if(stretch_bg){ //stretch entire background to entire canvas
    bmp_bg->blitRect();


  } else { //otherwise, repeat background bitmap in a tile pattern
    shape::rect dst; //destination rectangle
    dst.w = sizeBmp.x;
    dst.h = sizeBmp.y;

    shape::point sizeCanvas = gl_win->getCanvasSize();

    //increase x, then y until the entire canvas is drawn to
    for(dst.y = 0;  dst.y < sizeCanvas.y;  dst.y += dst.h)
    for(dst.x = 0;  dst.x < sizeCanvas.x;  dst.x += dst.w)
    {
      bmp_bg->blitRect(&dst, nullptr); //whole bitmap is used when src = nullptr
    }


  }
}