// O------------------------------------------------------------------------------O
// | END RENDERER: OpenGL 3.3 (3.0 es) (sh-sh-sh-shaders....)                     |
// O------------------------------------------------------------------------------O

// O------------------------------------------------------------------------------O
// | START IMAGE LOADER: GDI+, Windows Only, always exists, a little slow         |
// O------------------------------------------------------------------------------O
#if defined(OLC_IMAGE_GDI)

#define min(a, b) ((a < b) ? a : b)
#define max(a, b) ((a > b) ? a : b)
#include <gdiplus.h>
#if defined(__MINGW32__) // Thanks Gusgo & Dandistine, but c'mon mingw!! wtf?!
#include <gdiplus/gdiplusinit.h>
#else
#include <gdiplusinit.h>
#endif
#include <shlwapi.h>
#undef min
#undef max

#if !defined(__MINGW32__)
#pragma comment(lib, "gdiplus.lib")
#pragma comment(lib, "Shlwapi.lib")
#endif

namespace olc
{
	// Thanks @MaGetzUb for this, which allows sprites to be defined
	// at construction, by initialising the GDI subsystem
	static class GDIPlusStartup
	{
	public:
		GDIPlusStartup()
		{
			Gdiplus::GdiplusStartupInput startupInput;
			GdiplusStartup(&token, &startupInput, NULL);
		}

		ULONG_PTR	token;

		~GDIPlusStartup()
		{
			// Well, MarcusTU thought this was important :D
			Gdiplus::GdiplusShutdown(token);
		}
	} 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
			if (spr->pColData != nullptr) delete[] spr->pColData;

			// 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();