Question

我使用TCPDF在PDF中包含各种图像。图像大小不同。很少有图像是非常日志的，因为它们是完整的HTML页面转换为jpgs。当我试图包含这些图像时，他们没有移动到其他页面而是将其余部分修剪掉。这就是我正在做的事情：

class MYPDF extends TCPDF {
    public function Footer() {
        $this->SetY(-15);
        $this->SetFont('helvetica', 'I', 8);
        $this->Cell(0, 10, 'Page '.$this->getAliasNumPage().'/'.$this->getAliasNbPages(), 0, false, 'C', 0, '', 0, false, 'T', 'M');
    }
}

$pdf = new MYPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, false, 'ISO-8859-1', false);
$pdf->setHeaderData('', 0, '', '', array(0, 0, 0), array(255, 255, 255));
$pdf->SetDisplayMode('fullpage', 'SinglePage', 'UseNone');
$pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);

$pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);
$pdf->AddPage('P', 'A4');
$pdf->setJPEGQuality(100);

list($width, $height) = getimagesize($__my_image);
if (3 > $width / $height) 
    list($w, $h) = array(0, 300);
else 
    list($w, $h) = array(540, 0);

$pdf->Image($__my_image,10, 10, $w, $h, '', '', 'M');
$pdf->Output($__filename, 'F');

我想将剪裁的图像传递到下一页，但它没有这样做。

Answer 1

PHP Graphics Draw (GD)库有一些可以帮助你的工具，比如裁剪。

一个例子：

$imgUrl = $_POST['imgUrl'];
// original sizes
$imgInitW = $_POST['imgInitW'];
$imgInitH = $_POST['imgInitH'];
// resized sizes
$imgW = $_POST['imgW'];
$imgH = $_POST['imgH'];
// offsets
$imgY1 = $_POST['imgY1'];
$imgX1 = $_POST['imgX1'];
// crop box
$cropW = $_POST['cropW'];
$cropH = $_POST['cropH'];
// rotation angle
$angle = $_POST['rotation'];

$jpeg_quality = 100;

$output_dir = "temp/";
$output_filename = "croppedImg_".rand();

$img_r = imagecreatefrompng($imgUrl);
$source_image = imagecreatefrompng($imgUrl);
$type = '.png';

// resize the original image to size of editor
$resizedImage = imagecreatetruecolor($imgW, $imgH);
imagecopyresampled($resizedImage, $source_image, 0, 0, 0, 0, $imgW, $imgH, $imgInitW, $imgInitH);

// rotate the rezized image
$rotated_image = imagerotate($resizedImage, -$angle, 0);

// find new width & height of rotated image
$rotated_width = imagesx($rotated_image);
$rotated_height = imagesy($rotated_image);

// diff between rotated & original sizes
$dx = $rotated_width - $imgW;
$dy = $rotated_height - $imgH;

// crop rotated image to fit into original rezized rectangle
$cropped_rotated_image = imagecreatetruecolor($imgW, $imgH);
imagecolortransparent($cropped_rotated_image, imagecolorallocate($cropped_rotated_image, 0, 0, 0));
imagecopyresampled($cropped_rotated_image, $rotated_image, 0, 0, $dx / 2, $dy / 2, $imgW, $imgH, $imgW, $imgH);

// crop image into selected area
$final_image = imagecreatetruecolor($cropW, $cropH);
imagecolortransparent($final_image, imagecolorallocate($final_image, 0, 0, 0));
imagecopyresampled($final_image, $cropped_rotated_image, 0, 0, $imgX1, $imgY1, $cropW, $cropH, $cropW, $cropH);

// finally output png image
imagepng($final_image, $output_dir.$output_filename.".png", $png_quality);

// Delete original uploaded image
unlink($imgUrl);

现在如何调整它是两次裁剪原始图像假设您知道该页面的最大大小为800像素。但图像是1000像素。因此，您将其裁剪为0到800像素并将其保存为一个文件，然后将其保存为第二个文件的800到1000像素，然后将两个图像都放入PDF中。

我没有测试过这个，但是有点像：

if($imgH > 800){
    $diff = $imgH - 800;

    $file1 = imagecreatetruecolor($cropW, 800);
    imagecolortransparent($file1, imagecolorallocate($file1, 0, 0, 0));
    imagecopyresampled($file1, $large_image, 0, 0, 0, 0, $cropW, 800, $cropW, 800);
    imagepng($file1, $output_dir.$output_filename."-1.png", $png_quality);

    $file2 = imagecreatetruecolor($cropW, 800);
    imagecolortransparent($file2 , imagecolorallocate($file2 , 0, 0, 0));
    imagecopyresampled($file2 , $large_image, 0, 800, 0, 800, $cropW, $diff, $cropW, $diff);
    imagepng($file2, $output_dir.$output_filename."-2.png", $png_quality);
}

TCPDF：将大图像拆分为多个页面

1 个答案: