void PngUtil::mapObjectToPng(const char* filename, MapObject& mapObject) {
// Get the measurements
unsigned width = mapObject.getWidth();
unsigned height = mapObject.getHeight();
// Allocate a vector for the bytes array
std::vector<unsigned char> rawPixels;
rawPixels.resize(width * height * 4);
// Convert the map object to raw pixels
convertMapObjectToByteVector(mapObject,rawPixels);
// Make a png from the raw pixels
encodeOneStep(filename, rawPixels,width, height);
}
void PngUtil::convertMapObjectToByteVector(MapObject source,std::vector<unsigned char>& target) {
unsigned height = source.getHeight();
unsigned width = source.getWidth();
for (unsigned y = 0; y < height; y++) {
for (unsigned x = 0; x < width; x++) {
unsigned pixelNumber = y * width + x;
unsigned pixelBegining = 4 * pixelNumber;
unsigned red = ClearPixel.red;
unsigned green = ClearPixel.green;
unsigned blue = ClearPixel.blue;
unsigned alpha = 255;
// Decide the color of the pixel
switch(source.getCellAtPosition(x,y)){
case Clear :
break;
case Occupied :
red = OccupiedPixel.red;
green = OccupiedPixel.green;
blue = OccupiedPixel.blue;
break;
case Path:
red = PathPixel.red;
green = PathPixel.green;
blue = PathPixel.blue;
break;
case Target:
red = TargetPixel.red;
green = TargetPixel.green;
blue = TargetPixel.blue;
break;
case Source:
red = SourcePixel.red;
green = SourcePixel.green;
blue = SourcePixel.blue;
break;
}
// Fill the pixel color in the target
target[pixelBegining + 0] = red;
target[pixelBegining + 1] = green;
target[pixelBegining + 2] = blue;
target[pixelBegining + 3] = alpha;
}
}
}