XoopsModules25x / apcal

        if (strtolower($this->f) == 'jpg') {

            $this->f = 'jpeg';

        }

        if (phpthumb_functions::CaseInsensitiveInArray($this->config_output_format, $AvailableImageOutputFormats)) {

            // set output format to config default if that format is available

            $this->DebugMessage('$this->thumbnailFormat set to $this->config_output_format "' . strtolower($this->config_output_format) . '"', __FILE__, __LINE__);

            $this->thumbnailFormat = strtolower($this->config_output_format);

        } elseif ($this->config_output_format) {

            $this->DebugMessage('$this->thumbnailFormat staying as "'

                                . $this->thumbnailFormat

                                . '" because $this->config_output_format ('

                                . strtolower($this->config_output_format)

                                . ') is not in $AvailableImageOutputFormats', __FILE__, __LINE__);

        }

        if ($this->f && phpthumb_functions::CaseInsensitiveInArray($this->f, $AvailableImageOutputFormats)) {

            // override output format if $this->f is set and that format is available

            $this->DebugMessage('$this->thumbnailFormat set to $this->f "' . strtolower($this->f) . '"', __FILE__, __LINE__);

                                . strtolower($this->config_output_format)

                                . ') is not in $AvailableImageOutputFormats', __FILE__, __LINE__);

        }

        if ($this->f && phpthumb_functions::CaseInsensitiveInArray($this->f, $AvailableImageOutputFormats)) {

            // override output format if $this->f is set and that format is available

            $this->DebugMessage('$this->thumbnailFormat set to $this->f "' . strtolower($this->f) . '"', __FILE__, __LINE__);

            $this->thumbnailFormat = strtolower($this->f);

        } elseif ($this->f) {

            $this->DebugMessage('$this->thumbnailFormat staying as "' . $this->thumbnailFormat . '" because $this->f (' . strtolower($this->f) . ') is not in $AvailableImageOutputFormats', __FILE__,

                                __LINE__);

        }

        // for JPEG images, quality 1 (worst) to 99 (best)

        // quality < 25 is nasty, with not much size savings - not recommended