Class ImageLoader_GDIPlus

olcPixelGameEngine.h:6468–6535

	} gdistartup;

	class ImageLoader_GDIPlus : public olc::ImageLoader
	{
	private:
		std::wstring ConvertS2W(std::string s)
		{
#ifdef __MINGW32__
			wchar_t* buffer = new wchar_t[s.length() + 1];
			mbstowcs(buffer, s.c_str(), s.length());
			buffer[s.length()] = L'\0';
#else
			int count = MultiByteToWideChar(CP_UTF8, 0, s.c_str(), -1, NULL, 0);
			wchar_t* buffer = new wchar_t[count];
			MultiByteToWideChar(CP_UTF8, 0, s.c_str(), -1, buffer, count);
#endif
			std::wstring w(buffer);
			delete[] buffer;
			return w;
		}

	public:
		ImageLoader_GDIPlus() : ImageLoader()
		{}

		olc::rcode LoadImageResource(olc::Sprite* spr, const std::string& sImageFile, olc::ResourcePack* pack) override
		{
			// clear out existing sprite
			spr->pColData.clear();

			// Open file
			UNUSED(pack);
			Gdiplus::Bitmap* bmp = nullptr;
			if (pack != nullptr)
			{
				// Load sprite from input stream
				ResourceBuffer rb = pack->GetFileBuffer(sImageFile);
				bmp = Gdiplus::Bitmap::FromStream(SHCreateMemStream((BYTE*)rb.vMemory.data(), UINT(rb.vMemory.size())));
			}
			else
			{
				// Check file exists
				if (!_gfs::exists(sImageFile)) return olc::rcode::NO_FILE;

				// Load sprite from file
				bmp = Gdiplus::Bitmap::FromFile(ConvertS2W(sImageFile).c_str());
			}

			if (bmp->GetLastStatus() != Gdiplus::Ok) return olc::rcode::FAIL;
			spr->width = bmp->GetWidth();
			spr->height = bmp->GetHeight();

			spr->pColData.resize(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()));