我正在尝试用坐标实现裁剪图像。但如果是坐标，它就不会成功。我的代码是：
function image_thumb($image_path, $height, $width, $x=0, $y=0)
{
// Get the CodeIgniter super object
$CI =& get_instance();
// Path to image thumbnail
$image_thumb = dirname($image_path) . '/' . $height . '_' . $width . '.jpg';
if( ! file_exists($image_thumb))
{
// LOAD LIBRARY
$CI->load->library('image_lib');
// CONFIGURE IMAGE LIBRARY
$config['x_axis'] = $x;
$config['y_axis'] = $y;
$config['image_library'] = 'gd2';
$config['source_image'] = $image_path;
$config['new_image'] = $image_thumb;
$config['maintain_ratio'] = TRUE;
$config['height'] = $height;
$config['width'] = $width;
$CI->image_lib->initialize($config);
$CI->image_lib->resize();
$CI->image_lib->clear();
}
return '<img src="' . dirname($_SERVER['SCRIPT_NAME']) . '/' . $image_thumb . '" />';
}
请帮帮我......
答案 0 :(得分：2)
也许是因为你没有使用正确的功能 ......
$CI->image_lib->resize();
您的意思是crop()吗？
$CI->image_lib->crop();
我讨厌这样说，但是RTM。
这是一个可以同时裁剪和调整大小的功能：
function ImageCR($source, $crop = null, $scale = null, $destination = null)
{
$source = @ImageCreateFromString(@file_get_contents($source));
if (is_resource($source) === true)
{
$size = array(ImageSX($source), ImageSY($source));
if (isset($crop) === true)
{
$crop = array_filter(explode('/', $crop), 'is_numeric');
if (count($crop) == 2)
{
$crop = array($size[0] / $size[1], $crop[0] / $crop[1]);
if ($crop[0] > $crop[1])
{
$size[0] = $size[1] * $crop[1];
}
else if ($crop[0] < $crop[1])
{
$size[1] = $size[0] / $crop[1];
}
$crop = array(ImageSX($source) - $size[0], ImageSY($source) - $size[1]);
}
else
{
$crop = array(0, 0);
}
}
else
{
$crop = array(0, 0);
}
if (isset($scale) === true)
{
$scale = array_filter(explode('*', $scale), 'is_numeric');
if (count($scale) >= 1)
{
if (empty($scale[0]) === true)
{
$scale[0] = $scale[1] * $size[0] / $size[1];
}
else if (empty($scale[1]) === true)
{
$scale[1] = $scale[0] * $size[1] / $size[0];
}
}
else
{
$scale = array($size[0], $size[1]);
}
}
else
{
$scale = array($size[0], $size[1]);
}
$result = ImageCreateTrueColor($scale[0], $scale[1]);
if (is_resource($result) === true)
{
ImageFill($result, 0, 0, IMG_COLOR_TRANSPARENT);
ImageSaveAlpha($result, true);
ImageAlphaBlending($result, true);
if (ImageCopyResampled($result, $source, 0, 0, $crop[0] / 2, $crop[1] / 2, $scale[0], $scale[1], $size[0], $size[1]) === true)
{
if (preg_match('~gif$~i', $destination) >= 1)
{
return ImageGIF($result, $destination);
}
else if (preg_match('~png$~i', $destination) >= 1)
{
return ImagePNG($result, $destination, 9);
}
else if (preg_match('~jpe?g$~i', $destination) >= 1)
{
return ImageJPEG($result, $destination, 90);
}
}
}
}
return false;
}
像这样使用：
// resize to 400x400 px
ImageCR('path/to/sourceImg.jpg', null, '400*400', 'path/to/outputImg.jpg');
// crop to a 1:1 ratio (square) from the center
ImageCR('path/to/sourceImg.jpg', '1/1', null, 'path/to/outputImg.jpg');
// crop to a 1:1 ratio (square) from the center AND resize to 400x400 px
ImageCR('path/to/sourceImg.jpg', '1/1', '400*400', 'path/to/outputImg.jpg');
// crop to a 1:1 ratio (square) from the center AND resize to 400 px width AND maintain aspect ratio
ImageCR('path/to/sourceImg.jpg', '1/1', '400*', 'path/to/outputImg.jpg');
// crop to a 1:1 ratio (square) from the center AND resize to 400 px height AND maintain aspect ratio
ImageCR('path/to/sourceImg.jpg', '1/1', '*400', 'path/to/outputImg.jpg');
使用选项进行游戏，如果您有任何疑问，请告诉我。
答案 1 :(得分：0)
我得到了答案。 image_lib不支持裁剪并同时调整大小。所以我必须对代码进行一些修改。
/**
* Image Process Using GD/GD2
*
* This function will resize or crop
*
* @access public
* @param string
* @return bool
*/
function image_process_gd($action = 'resize', $org_w = 0, $org_h = 0)
{
$v2_override = FALSE;
// If the target width/height match the source, AND if the new file name is not equal to the old file name
// we'll simply make a copy of the original with the new name... assuming dynamic rendering is off.
if ($this->dynamic_output === FALSE)
{
if ($this->orig_width == $this->width AND $this->orig_height == $this->height)
{
if ($this->source_image != $this->new_image)
{
if (@copy($this->full_src_path, $this->full_dst_path))
{
@chmod($this->full_dst_path, DIR_WRITE_MODE);
}
}
return TRUE;
}
}
// Let's set up our values based on the action
if ($action == 'crop')
{
// Reassign the source width/height if cropping
$this->orig_width = $this->width;
$this->orig_height = $this->height;
// GD 2.0 has a cropping bug so we'll test for it
if ($this->gd_version() !== FALSE)
{
$gd_version = str_replace('0', '', $this->gd_version());
$v2_override = ($gd_version == 2) ? TRUE : FALSE;
}
}
else if ($action == 'resize')
{
// If resizing the x/y axis must be zero
$this->x_axis = 0;
$this->y_axis = 0;
} else {
$this->orig_width = $org_w;
$this->orig_height = $org_h;
}
// Create the image handle
if ( ! ($src_img = $this->image_create_gd()))
{
return FALSE;
}
// Create The Image
//
// old conditional which users report cause problems with shared GD libs who report themselves as "2.0 or greater"
// it appears that this is no longer the issue that it was in 2004, so we've removed it, retaining it in the comment
// below should that ever prove inaccurate.
//
// if ($this->image_library == 'gd2' AND function_exists('imagecreatetruecolor') AND $v2_override == FALSE)
if ($this->image_library == 'gd2' AND function_exists('imagecreatetruecolor'))
{
$create = 'imagecreatetruecolor';
$copy = 'imagecopyresampled';
}
else
{
$create = 'imagecreate';
$copy = 'imagecopyresized';
}
/*echo '<br /> Coordinate' . $this->x_axis . " x " . $this->y_axis;
echo '<br /> Destination size' .$this->width . " x " . $this->height;
echo '<br /> Originl Size' . $this->orig_width. " x " . $this->orig_height;*/
$dst_img = $create($this->width, $this->height);
$copy($dst_img, $src_img, 0, 0, $this->x_axis, $this->y_axis, $this->width, $this->height, $this->orig_width, $this->orig_height);
// Show the image
if ($this->dynamic_output == TRUE)
{
$this->image_display_gd($dst_img);
}
else
{
// Or save it
if ( ! $this->image_save_gd($dst_img))
{
return FALSE;
}
}
// Kill the file handles
imagedestroy($dst_img);
imagedestroy($src_img);
// Set the file to 777
@chmod($this->full_dst_path, DIR_WRITE_MODE);
return TRUE;
}
调用：
//set image library configuration
$config['image_library'] = 'gd2';
$config['source_image'] = $src_path;
$config['new_image'] = $des_path;
$config['maintain_ratio'] = FALSE;
$config['width'] = 150;
$config['height'] = 150;
$config['orig_width'] = $width;
$config['orig_height'] = $height;
$config['x_axis'] = $x;
$config['y_axis'] = $y;
$this->image_lib->initialize($config);
//process thumb and reset the original with and height
$this->image_lib->image_process_gd('thumb', $width, $height);