Buggy file

iomap.cpp

#include "lodepng/lodepng.h"
#include "iomap.h"

bool IOMap::exportPNG(const Map& map, std::string filename)
{
	uint32_t size = static_cast<uint32_t>(map._height) * static_cast<uint32_t>(map._width);
	std::vector<uint8_t> bytes(size * 4);

	for (uint16_t x = 0; x < map._height; ++x) {
		for (uint16_t y = 0; y < map._width; ++y) {
			auto index = map.index(x, y);
			bytes[index] = 255;
			bytes[index + 1] = 0;
			bytes[index + 2] = 0;
			bytes[index + 3] = 255;
		}
	}

	if (lodepng::encode(filename, bytes, map._height, map._width) != 0) {
		return false;
	}
	return true;
}