Function writeImageToMemory

TheForceEngine/TFE_Asset/imageAsset.cpp:202–265

///////////////////////////////////////////////// Code to write and read images from memory. /////////////////////////////////////////////////

	// Code to write and read images from memory.
	//////////////////////////////////////////////////////
	size_t writeImageToMemory(u8* output, u32 srcw, u32 srch, u32 dstw,
				  u32 dsth, const u32* pixelData)
	{
		size_t written;
		int ret;

		SDL_Surface* surf = SDL_CreateRGBSurfaceFrom((void *)pixelData, srcw, srch, 32, srcw * sizeof(u32),
							     0xFF, 0xFF00, 0xFF0000, 0xFF000000);
		if (!surf)
			return 0;
		if ((srcw != dstw) || (srch != dsth))
		{
			const SDL_Rect rs = { 0, 0, (int)srcw, (int)srch };
			const SDL_Rect rd = { 0, 0, (int)dstw, (int)dsth };
			SDL_Surface* scaled = SDL_CreateRGBSurface(0, dstw, dsth, 32,
								  0xFF, 0xFF00, 0xFF0000, 0xFF000000);
			if (!scaled)
			{
				SDL_FreeSurface(surf);
				return 0;
			}
			ret = SDL_SoftStretch(surf, &rs, scaled, &rd);
			if (ret != 0)
			{
				SDL_FreeSurface(surf);
				SDL_FreeSurface(scaled);
				return 0;
			}
			SDL_FreeSurface(surf);
			surf = scaled;
			srcw = dstw;
			srch = dsth;
		}

		SDL_RWops* memops = SDL_RWFromMem(output, srcw * srch * sizeof(u32));
		if (!memops)
		{
			SDL_FreeSurface(surf);
			return 0;
		}
		memops->write = _sdl_wop_mem;

		// I'm not a fan of this, but a few people on Linux have run into crashes executing this function.
		// Given it is from a third-party library, there is only so much I can do.
		bool imageSaveSuccess = true;
		try
		{
			ret = IMG_SavePNG_RW(surf, memops, 0);
		}
		catch (std::exception& ex)
		{
			written = 0;
			imageSaveSuccess = false;
			TFE_System::logWrite(LOG_ERROR, "Serialization", "Failed to generate a PNG for the save file, IMG_SavePNG_RW failed with exception '%s'", ex.what());
		};

		SDL_FreeSurface(surf);
		if (ret == 0 && imageSaveSuccess)