Java 使用 iText 在 pdf 的特定位置标记
Java Stamp on certain location of pdf using iText
我正在为前端使用 Javascript 制作一个 Web 应用程序，它是这样工作的：
我启动了应用程序，它通过我的浏览器打开了一个网页。
显示从我的目录中获取的 PDF 页面。
我可以选择单击图章并在图章周围拖动和移动
pdf 并放在我想要的地方。
完成后，我可以单击“保存”，它会自动保存 pdf
文件在我的目录中。
我可以打开文件夹中的 pdf 文件来查看更新后的 PDF
添加了邮票。
问题是当我打开 PDF 文件查看时，位置与图章在网络浏览器中的位置不一致。
window.dragMoveListener = dragMoveListener;
interact('.signer-box')
.draggable({
onmove: dragMoveListener,
inertia: true,
autoScroll: true,
restrict: {
elementRect: {top: 0, left: 0, bottom: 1, right: 1}
}
})
.resizable({
onmove: resizeMoveListener,
inertia: true,
edges: {left: true, right: true, bottom: true, top: true}
})
function dragMoveListener(event) {
var target = event.target;
var x = (parseFloat(target.getAttribute('data-x')) || 0) + event.dx;
var y = (parseFloat(target.getAttribute('data-y')) || 0) + event.dy;
target.style.webkitTransform = target.style.transform = 'translate(' + x + 'px, ' + y + 'px)';
target.setAttribute('data-x', x);
target.setAttribute('data-y', y);
computeSignerBoxPosition();
}
function resizeMoveListener(event) {
var target = event.target;
var x = (parseFloat(target.getAttribute('data-x')) || 0);
var y = (parseFloat(target.getAttribute('data-y')) || 0);
x += event.deltaRect.left;
y += event.deltaRect.top;
target.style.width = event.rect.width + 'px';
target.style.height = event.rect.height + 'px';
target.style.webkitTransform = target.style.transform = 'translate(' + x + 'px,' + y + 'px)';
target.setAttribute('data-x', x);
target.setAttribute('data-y', y);
computeSignerBoxPosition();
}
function computeSignerBoxPosition() {
var $signatureBox = $('.signer-box');
var sbDataX = parseFloat($signatureBox.attr('data-x'));
var sbDataY = parseFloat($signatureBox.attr('data-y'));
var sbOuterWidth = $signatureBox.outerWidth();
var sbOuterHeight = $signatureBox.outerHeight();
var w = $('#pdf-page').width();
var h = $('#pdf-page').height();
var top = sbDataX / w;
var left = sbDataY / h;
var width = sbOuterWidth / w;
var height = sbOuterHeight / h;
document.getElementById("widthValue").value = width;
document.getElementById("heightValue").value = height;
document.getElementById("coorX").value = top;
document.getElementById("coorY").value = left;
}
@charset "UTF-8";
#content{
text-align: center;
}
#pdf-container {
display: inline-block;
width: 100%;
user-select: none;
}
#pdf-page {
width: 100%;
}
.signer-box {
background: url('../images/pen_icon.png') #29e no-repeat 50% 50%;
background-size: 50%;
color: white;
font-size: 20px;
font-family: sans-serif;
border-radius: 8px;
width: 180px;
height: 150px;
position:absolute;
opacity: .8;
box-sizing: border-box;
box-shadow: rgb(0, 0, 0, 0.7) 0.2em 0.2em 0.5em;
-ms-touch-action: none;
touch-action: none;
}
#signature-pad {
position: relative;
width: 100%;
height: 160px;
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
user-select: none;
}
#signatureImg{
width: 100%;
}
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<div id="content">
<div class="wrap">
<hr style="border:15px;"><hr style="border:2px;">
<div id="wrapper">
<div id="content">
<div id="pdf-container" >
<div id="signers-list">
<div id="signer-1" class="signer-box"></div>
</div>
<img id="pdf-page" src="data:image/png;base64,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" />
</div>
</div>
</div>
</table></form>
<hr style="border:15px;"><hr style="border:2px;">
<div class="content">
<table id="customers">
<tr>
<td>
X:
</td>
<td>
<input type="text" name="coorX" id="coorX" value="0" readonly="readonly">
</td>
<td>
h:
</td>
<td>
<input type="text" name="heightValue" id="heightValue" value="150" readonly="readonly">
</td>
</tr>
<tr>
<td>
Y:
</td>
<td>
<input type="text" name="coorY" id="coorY" value="0" readonly="readonly">
</td>
<td>
w:
</td>
<td>
<input type="text" name="widthValue" id="widthValue" value="180" readonly="readonly">
</td>
</tr>
</table>
<hr>
</form>
</div><!-- /.wrap -->
</div><!-- /.content -->
</div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.0.943/pdf.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/interact.js/1.2.9/interact.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.0.943/pdf.worker.min.js'></script>
</body>
</html>
以下是使用 iText 处理冲压件的后端代码：
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
File file = new File("D:\Documents\pruebaPdf\Ejemplo_Uno.pdf");
file.getParentFile().mkdirs();
PdfReader reader = new PdfReader("D:\Documents\pruebaPdf\Ejemplo_Uno.pdf");
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("D:\Documents\pruebaPdf\Ejemplo_Dos.pdf"));
Document document = new Document();
try {
PdfContentByte cb = stamper.getOverContent(request.getParameter("page"));
float top = Float.valueOf(request.getParameter("top"));
float left = Float.valueOf(request.getParameter("left"));
float width = Float.valueOf(request.getParameter("width"));
float height = Float.valueOf(request.getParameter("height"));
// Just in case, take into account page rotation
Rectangle pdfRectangle = reader.getPageSizeWithRotation(1);
float pdfWidth = pdfRectangle.getWidth();
float pdfHeight = pdfRectangle.getHeight();
float llx = pdfWidth * left;
float lly = pdfHeight * (1 - top - height);
// Until iText 5 this code should work
float urx = llx + (pdfWidth * width);
float ury = lly + (pdfHeight * height);
Rectangle rect = new Rectangle(llx, lly, urx, ury);
rect.setBorder(Rectangle.BOX);
rect.setBorderWidth(1);
rect.setBackgroundColor(BaseColor.GRAY);
rect.setBorderColor(BaseColor.GREEN);
cb.rectangle(rect);
} catch (Exception e) {
System.out.println("ERROR=>>>>>>" + e);
}finally{
stamper.close();
reader.close();
document.close();
}
}
我要画出来的位置
我用计算出的坐标得到的位置
如 this companion question 中所述，目标是能够在图像在浏览器和实际 PDF 中的表示之间转换图像相对于 PDF 的位置和尺寸。
在此特定用例中，您已经拥有定义明确的元素结构，其中您的 PDF 预览图像以可预测的方式显示。
根据上述问题的建议，我觉得你需要把你签名框的相关要点，说：
var $signatureBox = $('.signer-box');
var sbDataX = parseFloat($signatureBox.attr('data-x'));
var sbDataY = parseFloat($signatureBox.attr('data-y'));
var sbOuterWidth = $signatureBox.outerWidth();
var sbOuterHeight = $signatureBox.outerHeight();
并将它们转换为相对于 PDF 图像宽度和高度的百分比：
var w = $('#pdf-page').width();
var h = $('#pdf-page').height();
var top = sbDataY / h;
var left = sbDataX / w;
var width = sbOuterWidth / w;
var height = sbOuterHeight / h;
我使用了相对于单位的值，如果您更喜欢使用百分比，请随时将它们乘以 100。只需在下一步中考虑即可。
这些相对值 top、left、width 和 height 将发送到您的后端。
可以在您的不同侦听器中计算此信息。例如，考虑一个通用函数的定义，该函数将用于在发生拖放或调整大小事件时定义正确的表单值：
window.dragMoveListener = dragMoveListener;
interact('.signer-box')
.draggable({
onmove: dragMoveListener,
inertia: true,
autoScroll: true,
restrict: {
elementRect: {top: 0, left: 0, bottom: 1, right: 1}
}
})
.resizable({
onmove: resizeMoveListener,
inertia: true,
edges: {left: true, right: true, bottom: true, top: true}
})
function dragMoveListener(event) {
var target = event.target;
var x = (parseFloat(target.getAttribute('data-x')) || 0) + event.dx;
var y = (parseFloat(target.getAttribute('data-y')) || 0) + event.dy;
target.style.webkitTransform = target.style.transform = 'translate(' + x + 'px, ' + y + 'px)';
target.setAttribute('data-x', x);
target.setAttribute('data-y', y);
computeSignerBoxPosition();
}
function resizeMoveListener(event) {
var target = event.target;
var x = (parseFloat(target.getAttribute('data-x')) || 0);
var y = (parseFloat(target.getAttribute('data-y')) || 0);
x += event.deltaRect.left;
y += event.deltaRect.top;
target.style.width = event.rect.width + 'px';
target.style.height = event.rect.height + 'px';
target.style.webkitTransform = target.style.transform = 'translate(' + x + 'px,' + y + 'px)';
target.setAttribute('data-x', x);
target.setAttribute('data-y', y);
computeSignerBoxPosition();
}
function computeSignerBoxPosition() {
var $signatureBox = $('.signer-box');
var sbDataX = parseFloat($signatureBox.attr('data-x'));
var sbDataY = parseFloat($signatureBox.attr('data-y'));
var sbOuterWidth = $signatureBox.outerWidth();
var sbOuterHeight = $signatureBox.outerHeight();
var w = $('#pdf-page').width();
var h = $('#pdf-page').height();
var top = sbDataY / h;
var left = sbDataX / w;
var width = sbOuterWidth / w;
var height = sbOuterHeight / h;
document.getElementById("widthValue").value = width;
document.getElementById("heightValue").value = height;
document.getElementById("coorX").value = left;
document.getElementById("coorY").value = top;
}
如前所述，我们的想法是计算当两个侦听器都发生变化时应该发送到后端的信息。作为一种优化，请不要在侦听器中计算必要的信息，而是考虑在您用于提交表单的按钮或可视元素上附加一个点击侦听器，该侦听器会在将信息发送到之前调用上述 computeSignerBoxPosition 函数后端，因为只有在那一刻才需要它。
有了这些信息，如原始答案中所示，您可以获得这样的正确位置：
float top = Float.valueOf(request.getParameter("top"));
float left = Float.valueOf(request.getParameter("left"));
float width = Float.valueOf(request.getParameter("width"));
float height = Float.valueOf(request.getParameter("height"));
// Just in case, take into account page rotation
Rectangle pdfRectangle = reader.getPageSizeWithRotation(1);
float pdfWidth = pdfRectangle.getWidth();
float pdfHeight = pdfRectangle.getHeight();
float llx = pdfWidth * left;
float lly = pdfHeight * (1 - top - height);
// Until iText 5 this code should work
float urx = llx + (pdfWidth * width);
float ury = lly + (pdfHeight * height);
// It seems that changed in Itext7 to this (they use just width and height)
// If it is your use case, please, comment the block above
// and uncomment the following lines
// float urx = pdfWidth * width;
// float ury = pdfHeight * height;
Rectangle rect = new Rectangle(llx, lly, urx, ury);
PdfStampAnnotation stamp = new PdfStampAnnotation(rect).setStampName(new PdfName("Approved"));
PdfFormXObject xObj = new PdfFormXObject(new Rectangle(width,height));
PdfCanvas canvas = new PdfCanvas(xObj,doc);
canvas.addImage(image,0,0,false);
该算法考虑到在 PDF 中页面的左下角与坐标系 (0, 0) 的原点重合，其中正 x 值位于原点的右侧和正 y 值高于原点（与浏览器对比）：
这张图片的来源是 Bruno Lowagie 在描述 and 时的作品。
同样重要的是要注意图像和 PDF 页面在浏览器中的实际尺寸和实际 PDF 文件应该保持不变，它们需要保持适当的纵横比；反之，您需要通过相应的系数修正您的尺寸。
我正在为前端使用 Javascript 制作一个 Web 应用程序，它是这样工作的：
我启动了应用程序，它通过我的浏览器打开了一个网页。
显示从我的目录中获取的 PDF 页面。
我可以选择单击图章并在图章周围拖动和移动 pdf 并放在我想要的地方。
完成后，我可以单击“保存”，它会自动保存 pdf 文件在我的目录中。
我可以打开文件夹中的 pdf 文件来查看更新后的 PDF 添加了邮票。
问题是当我打开 PDF 文件查看时，位置与图章在网络浏览器中的位置不一致。
window.dragMoveListener = dragMoveListener;
interact('.signer-box')
.draggable({
onmove: dragMoveListener,
inertia: true,
autoScroll: true,
restrict: {
elementRect: {top: 0, left: 0, bottom: 1, right: 1}
}
})
.resizable({
onmove: resizeMoveListener,
inertia: true,
edges: {left: true, right: true, bottom: true, top: true}
})
function dragMoveListener(event) {
var target = event.target;
var x = (parseFloat(target.getAttribute('data-x')) || 0) + event.dx;
var y = (parseFloat(target.getAttribute('data-y')) || 0) + event.dy;
target.style.webkitTransform = target.style.transform = 'translate(' + x + 'px, ' + y + 'px)';
target.setAttribute('data-x', x);
target.setAttribute('data-y', y);
computeSignerBoxPosition();
}
function resizeMoveListener(event) {
var target = event.target;
var x = (parseFloat(target.getAttribute('data-x')) || 0);
var y = (parseFloat(target.getAttribute('data-y')) || 0);
x += event.deltaRect.left;
y += event.deltaRect.top;
target.style.width = event.rect.width + 'px';
target.style.height = event.rect.height + 'px';
target.style.webkitTransform = target.style.transform = 'translate(' + x + 'px,' + y + 'px)';
target.setAttribute('data-x', x);
target.setAttribute('data-y', y);
computeSignerBoxPosition();
}
function computeSignerBoxPosition() {
var $signatureBox = $('.signer-box');
var sbDataX = parseFloat($signatureBox.attr('data-x'));
var sbDataY = parseFloat($signatureBox.attr('data-y'));
var sbOuterWidth = $signatureBox.outerWidth();
var sbOuterHeight = $signatureBox.outerHeight();
var w = $('#pdf-page').width();
var h = $('#pdf-page').height();
var top = sbDataX / w;
var left = sbDataY / h;
var width = sbOuterWidth / w;
var height = sbOuterHeight / h;
document.getElementById("widthValue").value = width;
document.getElementById("heightValue").value = height;
document.getElementById("coorX").value = top;
document.getElementById("coorY").value = left;
}
@charset "UTF-8";
#content{
text-align: center;
}
#pdf-container {
display: inline-block;
width: 100%;
user-select: none;
}
#pdf-page {
width: 100%;
}
.signer-box {
background: url('../images/pen_icon.png') #29e no-repeat 50% 50%;
background-size: 50%;
color: white;
font-size: 20px;
font-family: sans-serif;
border-radius: 8px;
width: 180px;
height: 150px;
position:absolute;
opacity: .8;
box-sizing: border-box;
box-shadow: rgb(0, 0, 0, 0.7) 0.2em 0.2em 0.5em;
-ms-touch-action: none;
touch-action: none;
}
#signature-pad {
position: relative;
width: 100%;
height: 160px;
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
user-select: none;
}
#signatureImg{
width: 100%;
}
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<div id="content">
<div class="wrap">
<hr style="border:15px;"><hr style="border:2px;">
<div id="wrapper">
<div id="content">
<div id="pdf-container" >
<div id="signers-list">
<div id="signer-1" class="signer-box"></div>
</div>
<img id="pdf-page" src="data:image/png;base64,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" />
</div>
</div>
</div>
</table></form>
<hr style="border:15px;"><hr style="border:2px;">
<div class="content">
<table id="customers">
<tr>
<td>
X:
</td>
<td>
<input type="text" name="coorX" id="coorX" value="0" readonly="readonly">
</td>
<td>
h:
</td>
<td>
<input type="text" name="heightValue" id="heightValue" value="150" readonly="readonly">
</td>
</tr>
<tr>
<td>
Y:
</td>
<td>
<input type="text" name="coorY" id="coorY" value="0" readonly="readonly">
</td>
<td>
w:
</td>
<td>
<input type="text" name="widthValue" id="widthValue" value="180" readonly="readonly">
</td>
</tr>
</table>
<hr>
</form>
</div><!-- /.wrap -->
</div><!-- /.content -->
</div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.0.943/pdf.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/interact.js/1.2.9/interact.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.0.943/pdf.worker.min.js'></script>
</body>
</html>
以下是使用 iText 处理冲压件的后端代码：
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
File file = new File("D:\Documents\pruebaPdf\Ejemplo_Uno.pdf");
file.getParentFile().mkdirs();
PdfReader reader = new PdfReader("D:\Documents\pruebaPdf\Ejemplo_Uno.pdf");
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("D:\Documents\pruebaPdf\Ejemplo_Dos.pdf"));
Document document = new Document();
try {
PdfContentByte cb = stamper.getOverContent(request.getParameter("page"));
float top = Float.valueOf(request.getParameter("top"));
float left = Float.valueOf(request.getParameter("left"));
float width = Float.valueOf(request.getParameter("width"));
float height = Float.valueOf(request.getParameter("height"));
// Just in case, take into account page rotation
Rectangle pdfRectangle = reader.getPageSizeWithRotation(1);
float pdfWidth = pdfRectangle.getWidth();
float pdfHeight = pdfRectangle.getHeight();
float llx = pdfWidth * left;
float lly = pdfHeight * (1 - top - height);
// Until iText 5 this code should work
float urx = llx + (pdfWidth * width);
float ury = lly + (pdfHeight * height);
Rectangle rect = new Rectangle(llx, lly, urx, ury);
rect.setBorder(Rectangle.BOX);
rect.setBorderWidth(1);
rect.setBackgroundColor(BaseColor.GRAY);
rect.setBorderColor(BaseColor.GREEN);
cb.rectangle(rect);
} catch (Exception e) {
System.out.println("ERROR=>>>>>>" + e);
}finally{
stamper.close();
reader.close();
document.close();
}
}
我要画出来的位置
我用计算出的坐标得到的位置
如 this companion question 中所述，目标是能够在图像在浏览器和实际 PDF 中的表示之间转换图像相对于 PDF 的位置和尺寸。
在此特定用例中，您已经拥有定义明确的元素结构，其中您的 PDF 预览图像以可预测的方式显示。
根据上述问题的建议，我觉得你需要把你签名框的相关要点，说：
var $signatureBox = $('.signer-box');
var sbDataX = parseFloat($signatureBox.attr('data-x'));
var sbDataY = parseFloat($signatureBox.attr('data-y'));
var sbOuterWidth = $signatureBox.outerWidth();
var sbOuterHeight = $signatureBox.outerHeight();
并将它们转换为相对于 PDF 图像宽度和高度的百分比：
var w = $('#pdf-page').width();
var h = $('#pdf-page').height();
var top = sbDataY / h;
var left = sbDataX / w;
var width = sbOuterWidth / w;
var height = sbOuterHeight / h;
我使用了相对于单位的值，如果您更喜欢使用百分比，请随时将它们乘以 100。只需在下一步中考虑即可。
这些相对值 top、left、width 和 height 将发送到您的后端。
可以在您的不同侦听器中计算此信息。例如，考虑一个通用函数的定义，该函数将用于在发生拖放或调整大小事件时定义正确的表单值：
window.dragMoveListener = dragMoveListener;
interact('.signer-box')
.draggable({
onmove: dragMoveListener,
inertia: true,
autoScroll: true,
restrict: {
elementRect: {top: 0, left: 0, bottom: 1, right: 1}
}
})
.resizable({
onmove: resizeMoveListener,
inertia: true,
edges: {left: true, right: true, bottom: true, top: true}
})
function dragMoveListener(event) {
var target = event.target;
var x = (parseFloat(target.getAttribute('data-x')) || 0) + event.dx;
var y = (parseFloat(target.getAttribute('data-y')) || 0) + event.dy;
target.style.webkitTransform = target.style.transform = 'translate(' + x + 'px, ' + y + 'px)';
target.setAttribute('data-x', x);
target.setAttribute('data-y', y);
computeSignerBoxPosition();
}
function resizeMoveListener(event) {
var target = event.target;
var x = (parseFloat(target.getAttribute('data-x')) || 0);
var y = (parseFloat(target.getAttribute('data-y')) || 0);
x += event.deltaRect.left;
y += event.deltaRect.top;
target.style.width = event.rect.width + 'px';
target.style.height = event.rect.height + 'px';
target.style.webkitTransform = target.style.transform = 'translate(' + x + 'px,' + y + 'px)';
target.setAttribute('data-x', x);
target.setAttribute('data-y', y);
computeSignerBoxPosition();
}
function computeSignerBoxPosition() {
var $signatureBox = $('.signer-box');
var sbDataX = parseFloat($signatureBox.attr('data-x'));
var sbDataY = parseFloat($signatureBox.attr('data-y'));
var sbOuterWidth = $signatureBox.outerWidth();
var sbOuterHeight = $signatureBox.outerHeight();
var w = $('#pdf-page').width();
var h = $('#pdf-page').height();
var top = sbDataY / h;
var left = sbDataX / w;
var width = sbOuterWidth / w;
var height = sbOuterHeight / h;
document.getElementById("widthValue").value = width;
document.getElementById("heightValue").value = height;
document.getElementById("coorX").value = left;
document.getElementById("coorY").value = top;
}
如前所述，我们的想法是计算当两个侦听器都发生变化时应该发送到后端的信息。作为一种优化，请不要在侦听器中计算必要的信息，而是考虑在您用于提交表单的按钮或可视元素上附加一个点击侦听器，该侦听器会在将信息发送到之前调用上述 computeSignerBoxPosition 函数后端，因为只有在那一刻才需要它。
有了这些信息，如原始答案中所示，您可以获得这样的正确位置：
float top = Float.valueOf(request.getParameter("top"));
float left = Float.valueOf(request.getParameter("left"));
float width = Float.valueOf(request.getParameter("width"));
float height = Float.valueOf(request.getParameter("height"));
// Just in case, take into account page rotation
Rectangle pdfRectangle = reader.getPageSizeWithRotation(1);
float pdfWidth = pdfRectangle.getWidth();
float pdfHeight = pdfRectangle.getHeight();
float llx = pdfWidth * left;
float lly = pdfHeight * (1 - top - height);
// Until iText 5 this code should work
float urx = llx + (pdfWidth * width);
float ury = lly + (pdfHeight * height);
// It seems that changed in Itext7 to this (they use just width and height)
// If it is your use case, please, comment the block above
// and uncomment the following lines
// float urx = pdfWidth * width;
// float ury = pdfHeight * height;
Rectangle rect = new Rectangle(llx, lly, urx, ury);
PdfStampAnnotation stamp = new PdfStampAnnotation(rect).setStampName(new PdfName("Approved"));
PdfFormXObject xObj = new PdfFormXObject(new Rectangle(width,height));
PdfCanvas canvas = new PdfCanvas(xObj,doc);
canvas.addImage(image,0,0,false);
该算法考虑到在 PDF 中页面的左下角与坐标系 (0, 0) 的原点重合，其中正 x 值位于原点的右侧和正 y 值高于原点（与浏览器对比）：
这张图片的来源是 Bruno Lowagie 在描述
同样重要的是要注意图像和 PDF 页面在浏览器中的实际尺寸和实际 PDF 文件应该保持不变，它们需要保持适当的纵横比；反之，您需要通过相应的系数修正您的尺寸。