用新的高度和宽度绘制PDF x和y坐标 [英] Plot PDF x and y co-ordinates with new height and width

问题描述

我正在使用DebenuPDF库生成导出PDF，我的问题与Debenu无关。



在我的网页中，我将渲染静态高度的tiff文件和宽度。在Tiff文件中，用户可以添加注释。高度和宽度示例如下所示



页面高度= 600

页面宽度= 400


当用户绘制注释时我正在捕捉X和Y坐标



X坐标= 121.25

Y坐标= 325.90



导出pdf时我必须以tiff文件的原始大小进行操作，用户上传的内容如



页面高度= 1210

页面宽度= 1650



我想知道在哪里绘制注释用户绘制。虽然导出PDF注释是用旧的X和Y坐标绘制的，所以它指向其他一些地方



请有人建议计算X和Y的公式新的高度和宽度。

I'm generating a Export PDF using DebenuPDF library, my question is not related to Debenu.

In my web page I will render tiff file with static height and width. In the Tiff file user can add the annotation. Height and width example as shown below

Page Height = 600
Page Width = 400

While the user plotting the annotation I was capturing the X and Y co-ordinates

X co-ordinate = 121.25
Y co-ordinate = 325.90

While exporting the pdf I have to do it in original size of tiff file what the user uploaded such as

Page Height = 1210
Page Width = 1650

I want to know plot the annotation where the user plotted. While exporting the PDF annotations are plotted with old X and Y co-ordinates so its pointing to some other places

Please anybody suggest the formula to calculate the X and Y co-ordinates with new height and width.

推荐答案

不确定我读得那么好，但是：



如果您的格式从600x400缩放到1210x1650，那么您的X缩放比例为1210/600 = 2,0167，Y缩放比例为1650/400 = 4,125。在您的示例中，假设是线性的，新的x和y坐标将是X = 1210/600 * 121,25 = 244并且Y = 1650/400 * 325,9 = 1340

Not sure I read that well, but:

If your format is scaled from 600x400 to 1210x1650, then you have a X scaling of 1210/600=2,0167 and a Y scaling of 1650/400=4,125. In your example, and assuming linear, the new x and y coordinate would be X=1210/600*121,25=244 and Y=1650/400*325,9=1340

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