system/Images/Handlers/GDHandler.php
protected function createImage(string $path = '', string $imageType = '')
	{
		if ($this->resource !== null)
		{
			return $this->resource;
		}

		if ($path === '')
		{
			$path = $this->image->getPathname();
		}

		if ($imageType === '')
		{
			$imageType = $this->image->imageType;
		}

		switch ($imageType)
		{
			case IMAGETYPE_GIF:
				if (! function_exists('imagecreatefromgif'))
				{
					throw ImageException::forInvalidImageCreate(lang('images.gifNotSupported'));
				}

				return imagecreatefromgif($path);
			case IMAGETYPE_JPEG:
				if (! function_exists('imagecreatefromjpeg'))
				{
					throw ImageException::forInvalidImageCreate(lang('images.jpgNotSupported'));
				}

				return imagecreatefromjpeg($path);
			case IMAGETYPE_PNG:
				if (! function_exists('imagecreatefrompng'))
				{
					throw ImageException::forInvalidImageCreate(lang('images.pngNotSupported'));
				}

				return imagecreatefrompng($path);
			default:
				throw ImageException::forInvalidImageCreate('Ima');
		}
	}
protected function createImage(string $path = '', string $imageType = '')
	{
		if ($this->resource !== null)
		{
			return $this->resource;
		}

		if ($path === '')
		{
			$path = $this->image->getPathname();
		}

		if ($imageType === '')
		{
			$imageType = $this->image->imageType;
		}

		switch ($imageType)
		{
			case IMAGETYPE_GIF:
				if (! function_exists('imagecreatefromgif'))
				{
					throw ImageException::forInvalidImageCreate(lang('images.gifNotSupported'));
				}

				return imagecreatefromgif($path);
			case IMAGETYPE_JPEG:
				if (! function_exists('imagecreatefromjpeg'))
				{
					throw ImageException::forInvalidImageCreate(lang('images.jpgNotSupported'));
				}

				return imagecreatefromjpeg($path);
			case IMAGETYPE_PNG:
				if (! function_exists('imagecreatefrompng'))
				{
					throw ImageException::forInvalidImageCreate(lang('images.pngNotSupported'));
				}

				return imagecreatefrompng($path);
			default:
				throw ImageException::forInvalidImageCreate('Ima');
		}
	}
Create Image Resource

This simply creates an image resource handle
based on the type of image being processed

@param string    $path
@param string    $imageType

@return resource|boolean