PHP ewww_image_optimizer_jpg_quality函数代码示例

//.........这里部分代码省略.........
</td></tr>
				<tr><th><label for="ewww_image_optimizer_jpg_to_png"><?php 
    printf(__('enable %s to %s conversion', EWWW_IMAGE_OPTIMIZER_DOMAIN), 'JPG', 'PNG');
    ?>
</label></th><td><span><input type="checkbox" id="ewww_image_optimizer_jpg_to_png" name="ewww_image_optimizer_jpg_to_png" <?php 
    if (ewww_image_optimizer_get_option('ewww_image_optimizer_jpg_to_png') == TRUE) {
        ?>
checked="true"<?php 
    }
    ?>
 /> <b><?php 
    _e('WARNING:', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</b> <?php 
    _e('Removes metadata and increases cpu usage dramatically.', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</span>
				<p class="description"><?php 
    _e('PNG is generally much better than JPG for logos and other images with a limited range of colors. Checking this option will slow down JPG processing significantly, and you may want to enable it only temporarily.', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</p></td></tr>
				<tr><th><label for="ewww_image_optimizer_png_to_jpg"><?php 
    printf(__('enable %s to %s conversion', EWWW_IMAGE_OPTIMIZER_DOMAIN), 'PNG', 'JPG');
    ?>
</label></th><td><span><input type="checkbox" id="ewww_image_optimizer_png_to_jpg" name="ewww_image_optimizer_png_to_jpg" <?php 
    if (ewww_image_optimizer_get_option('ewww_image_optimizer_png_to_jpg') == TRUE) {
        ?>
checked="true"<?php 
    }
    ?>
 /> <b><?php 
    _e('WARNING:', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</b> <?php 
    _e('This is not a lossless conversion.', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</span>
				<p class="description"><?php 
    _e('JPG is generally much better than PNG for photographic use because it compresses the image and discards data. PNGs with transparency are not converted by default.', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</p>
				<span><label for="ewww_image_optimizer_jpg_background"> <?php 
    _e('JPG background color:', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</label> #<input type="text" id="ewww_image_optimizer_jpg_background" name="ewww_image_optimizer_jpg_background" class="small-text" value="<?php 
    echo ewww_image_optimizer_jpg_background();
    ?>
" /> <span style="padding-left: 12px; font-size: 12px; border: solid 1px #555555; background-color: #<?php 
    echo ewww_image_optimizer_jpg_background();
    ?>
">&nbsp;</span> <?php 
    _e('HEX format (#123def)', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
.</span>
				<p class="description"><?php 
    _e('Background color is used only if the PNG has transparency. Leave this value blank to skip PNGs with transparency.', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</p>
				<span><label for="ewww_image_optimizer_jpg_quality"><?php 
    _e('JPG quality level:', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</label> <input type="text" id="ewww_image_optimizer_jpg_quality" name="ewww_image_optimizer_jpg_quality" class="small-text" value="<?php 
    echo ewww_image_optimizer_jpg_quality();
    ?>
" /> <?php 
    _e('Valid values are 1-100.', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</span>
				<p class="description"><?php 
    _e('If JPG quality is blank, the plugin will attempt to set the optimal quality level or default to 92. Remember, this is a lossy conversion, so you are losing pixels, and it is not recommended to actually set the level here unless you want noticable loss of image quality.', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</p></td></tr>
				<tr><th><label for="ewww_image_optimizer_gif_to_png"><?php 
    printf(__('enable %s to %s conversion', EWWW_IMAGE_OPTIMIZER_DOMAIN), 'GIF', 'PNG');
    ?>
</label></th><td><span><input type="checkbox" id="ewww_image_optimizer_gif_to_png" name="ewww_image_optimizer_gif_to_png" <?php 
    if (ewww_image_optimizer_get_option('ewww_image_optimizer_gif_to_png') == TRUE) {
        ?>
checked="true"<?php 
    }
    ?>
 /> <?php 
    _e('No warnings here, just do it.', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</span>
				<p class="description"> <?php 
    _e('PNG is generally better than GIF, but animated images cannot be converted.', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
</p></td></tr>
			</table>
			</div></div>
			<p class="submit"><input type="submit" class="button-primary" value="<?php 
    _e('Save Changes', EWWW_IMAGE_OPTIMIZER_DOMAIN);
    ?>
" /></p>
		</form>
		<p>I recommend hosting your Wordpress site with <a href="http://www.dreamhost.com/r.cgi?132143">Dreamhost.com</a> or <a href="http://www.bluehost.com/track/nosilver4u">Bluehost.com</a>. Using these referral links will allow you to support future development of this plugin: <a href=http://www.dreamhost.com/r.cgi?132143">Dreamhost</a> | <a href="http://www.bluehost.com/track/nosilver4u">Bluehost</a>. Alternatively, you can contribute directly by <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=MKMQKCBFFG3WW">donating with Paypal</a>.</p>
	</div>
	<?php 
}

//.........这里部分代码省略.........
                    $type = 'image/png';
                    // successful conversion and we store the increment
                    $converted = $filenum;
                } else {
                    $ewww_debug .= "converted PNG is no good<br>";
                    // otherwise delete the PNG
                    $converted = FALSE;
                    if (is_file($pngfile)) {
                        unlink($pngfile);
                    }
                }
            }
            ewww_image_optimizer_webp_create($file, $new_size, $type, $tools['WEBP']);
            break;
        case 'image/png':
            // png2jpg conversion is turned on, and the image is in the wordpress media library
            if ((ewww_image_optimizer_get_option('ewww_image_optimizer_png_to_jpg') || !empty($_GET['ewww_convert'])) && $gallery_type == 1 && !$skip_lossy) {
                $ewww_debug .= "PNG to JPG conversion turned on<br>";
                // if the user set a fill background for transparency
                $background = '';
                if ($background = ewww_image_optimizer_jpg_background()) {
                    // set background color for GD
                    $r = hexdec('0x' . strtoupper(substr($background, 0, 2)));
                    $g = hexdec('0x' . strtoupper(substr($background, 2, 2)));
                    $b = hexdec('0x' . strtoupper(substr($background, 4, 2)));
                    // set the background flag for 'convert'
                    $background = "-background " . '"' . "#{$background}" . '"';
                } else {
                    $r = '';
                    $g = '';
                    $b = '';
                }
                // if the user manually set the JPG quality
                if ($quality = ewww_image_optimizer_jpg_quality()) {
                    // set the quality for GD
                    $gquality = $quality;
                    // set the quality flag for 'convert'
                    $cquality = "-quality {$quality}";
                } else {
                    $cquality = '';
                    $gquality = '92';
                }
                // if this is a resize version
                if ($converted) {
                    // just replace the file extension with a .jpg
                    $jpgfile = preg_replace('/\\.\\w+$/', '.jpg', $file);
                    // if this is a full version
                } else {
                    // construct the filename for the new JPG
                    list($jpgfile, $filenum) = ewww_image_optimizer_unique_filename($file, '.jpg');
                }
            } else {
                $ewww_debug .= "PNG to JPG conversion turned off<br>";
                // turn the conversion process OFF
                $convert = false;
                $jpgfile = '';
                $r = null;
                $g = null;
                $b = null;
                $gquality = null;
            }
            // check for previous optimization, so long as the force flag is on and this isn't a new image that needs converting
            if (empty($_REQUEST['ewww_force']) && !($new && $convert)) {
                if ($results_msg = ewww_image_optimizer_check_table($file, $orig_size)) {
                    return array($file, $results_msg, $converted, $original);
                }

//.........这里部分代码省略.........
    if (get_site_option('ewww_image_optimizer_optipng_level') == 7) {
        echo ' selected="selected"';
    }
    ?>
>Level 7: 240 trials</option>
				</select> (default=2)</span>
				<p class="description">According to the author of optipng, 10 trials should satisfy most people, 30 trials should satisfy everyone.</p></td></tr>
				<tr><th><label for="ewww_image_optimizer_pngout_level">pngout optimization level</label></th>
				<td><span><select id="ewww_image_optimizer_pngout_level" name="ewww_image_optimizer_pngout_level">
				<option value="0"<?php 
    if (get_site_option('ewww_image_optimizer_pngout_level') == 0) {
        echo ' selected="selected"';
    }
    ?>
>Level 0: Xtreme! (Slowest)</option>
				<option value="1"<?php 
    if (get_site_option('ewww_image_optimizer_pngout_level') == 1) {
        echo ' selected="selected"';
    }
    ?>
>Level 1: Intense (Slow)</option>
				<option value="2"<?php 
    if (get_site_option('ewww_image_optimizer_pngout_level') == 2) {
        echo ' selected="selected"';
    }
    ?>
>Level 2: Longest Match (Fast)</option>
				<option value="3"<?php 
    if (get_site_option('ewww_image_optimizer_pngout_level') == 3) {
        echo ' selected="selected"';
    }
    ?>
>Level 3: Huffman Only (Faster)</option>
			</select> (default=2)</span>
			<p class="description">If you have CPU cycles to spare, go with level 0</p></td></tr>
			</table>
			<h3>Conversion Settings</h3>
			<p>
				Conversion is not available in NextGEN or GRAND FlAGallery.
				By default, all images have a link available in the media library for one-time conversion. Turning on individual conversion operations below will enable conversion filters any time an image is uploaded or modified.<br />
				<b>NOTE:</b> The plugin will attempt to update image locations for any posts that contain the images. You may need to manually update locations/urls for converted images. 
			</p>
			<table class="form-table">
				<tr><th><label for="ewww_image_optimizer_disable_convert_links">Hide Conversion Links</label</th><td><input type="checkbox" id="ewww_image_optimizer_disable_convert_links" name="ewww_image_optimizer_disable_convert_links" <?php 
    if (get_site_option('ewww_image_optimizer_disable_convert_links') == TRUE) {
        ?>
checked="true"<?php 
    }
    ?>
 /> Site or Network admins can use this to prevent other users from using the conversion links in the Media Library which bypass the settings below.</td></tr>
				<tr><th><label for="ewww_image_optimizer_delete_originals">Delete originals</label></th><td><input type="checkbox" id="ewww_image_optimizer_delete_originals" name="ewww_image_optimizer_delete_originals" <?php 
    if (get_site_option('ewww_image_optimizer_delete_originals') == TRUE) {
        ?>
checked="true"<?php 
    }
    ?>
 /> This will remove the original image from the server after a successful conversion.</td></tr>
				<tr><th><label for="ewww_image_optimizer_jpg_to_png">enable <b>JPG</b> to <b>PNG</b> conversion</label></th><td><span><input type="checkbox" id="ewww_image_optimizer_jpg_to_png" name="ewww_image_optimizer_jpg_to_png" <?php 
    if (get_site_option('ewww_image_optimizer_jpg_to_png') == TRUE) {
        ?>
checked="true"<?php 
    }
    ?>
 /> <b>WARNING:</b> Removes metadata! Requires GD or ImageMagick and should be used sparingly.</span>
				<p class="description">PNG is generally much better than JPG for logos and other images with a limited range of colors. Checking this option will slow down JPG processing significantly, and you may want to enable it only temporarily.</p></td></tr>
				<tr><th><label for="ewww_image_optimizer_png_to_jpg">enable <b>PNG</b> to <b>JPG</b> conversion</label></th><td><span><input type="checkbox" id="ewww_image_optimizer_png_to_jpg" name="ewww_image_optimizer_png_to_jpg" <?php 
    if (get_site_option('ewww_image_optimizer_png_to_jpg') == TRUE) {
        ?>
checked="true"<?php 
    }
    ?>
 /> <b>WARNING:</b> This is not a lossless conversion and requires GD or ImageMagick.</span>
				<p class="description">JPG is generally much better than PNG for photographic use because it compresses the image and discards data. PNGs with transparency are not converted by default.</p>
				<span><label for="ewww_image_optimizer_jpg_background">JPG background color:</label> #<input type="text" id="ewww_image_optimizer_jpg_background" name="ewww_image_optimizer_jpg_background" class="small-text" value="<?php 
    echo ewww_image_optimizer_jpg_background();
    ?>
" /> <span style="padding-left: 12px; font-size: 12px; border: solid 1px #555555; background-color: #<?php 
    echo ewww_image_optimizer_jpg_background();
    ?>
">&nbsp;</span> HEX format (#123def).</span>
				<p class="description">This is used only if the PNG has transparency. Leave this value blank to skip PNGs with transparency.</p>
				<span><label for="ewww_image_optimizer_jpg_quality">JPG quality level:</label> <input type="text" id="ewww_image_optimizer_jpg_quality" name="ewww_image_optimizer_jpg_quality" class="small-text" value="<?php 
    echo ewww_image_optimizer_jpg_quality();
    ?>
" /> Valid values are 1-100.</span>
				<p class="description">If left blank, the plugin will attempt to set the optimal quality level or default to 92. Remember, this is a lossy conversion, so you are losing pixels, and it is not recommended to actually set the level here unless you want noticable loss of image quality.</p></td></tr>
				<tr><th><label for="ewww_image_optimizer_gif_to_png">enable <b>GIF</b> to <b>PNG</b> conversion</label></th><td><input type="checkbox" id="ewww_image_optimizer_gif_to_png" name="ewww_image_optimizer_gif_to_png" <?php 
    if (get_site_option('ewww_image_optimizer_gif_to_png') == TRUE) {
        ?>
checked="true"<?php 
    }
    ?>
 />
				<p class="description"> PNG is generally much better than GIF, but animated images cannot be converted.</p></td></tr>
			</table>
			<p class="submit"><input type="submit" class="button-primary" value="Save Changes" /></p>
		</form>
	</div>
	<?php 
}