spr->height = bmp->GetHeight();
			spr->pColData = new Pixel[spr->width * spr->height];

			for (int y = 0; y < spr->height; y++)
				for (int x = 0; x < spr->width; x++)
				{
					Gdiplus::Color c;
					bmp->GetPixel(x, y, &c);
					spr->SetPixel(x, y, olc::Pixel(c.GetRed(), c.GetGreen(), c.GetBlue(), c.GetAlpha()));
				}
			delete bmp;
			return olc::rcode::OK;
		}

		olc::rcode SaveImageResource(olc::Sprite* spr, const std::string& sImageFile) override
		{
			return olc::rcode::OK;
		}
	};
}
#endif
// O------------------------------------------------------------------------------O
// | END IMAGE LOADER: GDI+                                                       |
// O------------------------------------------------------------------------------O




// O------------------------------------------------------------------------------O
// | START IMAGE LOADER: libpng, default on linux, requires -lpng  (libpng-dev)   |
// O------------------------------------------------------------------------------O
#if defined(OLC_IMAGE_LIBPNG)
#include <png.h>
namespace olc
{
	void pngReadStream(png_structp pngPtr, png_bytep data, png_size_t length)
	{
		png_voidp a = png_get_io_ptr(pngPtr);
		((std::istream*)a)->read((char*)data, length);
	}

	class ImageLoader_LibPNG : public olc::ImageLoader
	{
	public:
		ImageLoader_LibPNG() : ImageLoader()
		{}

		olc::rcode LoadImageResource(olc::Sprite* spr, const std::string& sImageFile, olc::ResourcePack* pack) override
		{
			UNUSED(pack);

			// clear out existing sprite
			if (spr->pColData != nullptr) delete[] spr->pColData;

			////////////////////////////////////////////////////////////////////////////
			// Use libpng, Thanks to Guillaume Cottenceau
			// https://gist.github.com/niw/5963798
			// Also reading png from streams
			// http://www.piko3d.net/tutorials/libpng-tutorial-loading-png-files-from-streams/
			png_structp png;
			png_infop info;

			auto loadPNG = [&]()
			{
				png_read_info(png, info);
				png_byte color_type;
				png_byte bit_depth;
				png_bytep* row_pointers;
				spr->width = png_get_image_width(png, info);
				spr->height = png_get_image_height(png, info);
				color_type = png_get_color_type(png, info);
				bit_depth = png_get_bit_depth(png, info);
				if (bit_depth == 16) png_set_strip_16(png);
				if (color_type == PNG_COLOR_TYPE_PALETTE) png_set_palette_to_rgb(png);
				if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)	png_set_expand_gray_1_2_4_to_8(png);
				if (png_get_valid(png, info, PNG_INFO_tRNS)) png_set_tRNS_to_alpha(png);
				if (color_type == PNG_COLOR_TYPE_RGB || color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_PALETTE)
					png_set_filler(png, 0xFF, PNG_FILLER_AFTER);
				if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
					png_set_gray_to_rgb(png);
				png_read_update_info(png, info);
				row_pointers = (png_bytep*)malloc(sizeof(png_bytep) * spr->height);
				for (int y = 0; y < spr->height; y++) {
					row_pointers[y] = (png_byte*)malloc(png_get_rowbytes(png, info));
				}
				png_read_image(png, row_pointers);
				////////////////////////////////////////////////////////////////////////////
				// Create sprite array
				spr->pColData = new Pixel[spr->width * spr->height];
				// Iterate through image rows, converting into sprite format
				for (int y = 0; y < spr->height; y++)
				{
					png_bytep row = row_pointers[y];
					for (int x = 0; x < spr->width; x++)
					{
						png_bytep px = &(row[x * 4]);
						spr->SetPixel(x, y, Pixel(px[0], px[1], px[2], px[3]));
					}
				}