void Level::LoadFromPng(std::string pngFile) {
File file;
if (!file.Load(pngFile)) {
return;
}
LodePNG::Decoder decoder;
std::vector<unsigned char> image;
decoder.decode(image, (const unsigned char*)file.Data(), file.Size());
for(int i=0; i<image.size();i+=4) {
int pixelIndex = i/4;
unsigned char r = image[i];
unsigned char g = image[i+1];
unsigned char b = image[i+2];
unsigned char a = image[i+3];
/*
"Green",
"Red",
"Blue",
"Yellow"
*/
if (r==255 && g == 0 && b == 255) continue; //magenta is nothing
int x = pixelIndex % decoder.getWidth();
int y = pixelIndex / decoder.getWidth();
Point p = {x,y};
allPoints.insert(p);
if (r==255 && g == 255 && b == 255) {
blockable.insert(p);
} else if (r == 0 && g == 0 && b == 0) {
spawnable.insert(p);
} else if (r==0 && g == 255 && b == 0) {
colorSpawnPoints[0].insert(p);
}else if (r==255 && g == 0 && b == 0) {
colorSpawnPoints[1].insert(p);
}else if (r==0 && g == 0 && b == 255) {
colorSpawnPoints[2].insert(p);
}else if (r==255 && g == 255 && b == 0) {
colorSpawnPoints[3].insert(p);
}
}
if (allPoints.empty()) return;
Point min = *allPoints.begin();
Point max = min;
for(auto p : allPoints) {
if (p.x>max.x) max.x = p.x;
if (p.x<min.x) min.x = p.x;
if (p.y>max.y) max.y = p.y;
if (p.y<min.y) min.y = p.y;
}
Point mid = (max - min)/2;
Point size = (max - min)/2 ;
ModifyList(blockable, -mid - size);
ModifyList(spawnable, -mid-size);
}
