Avatar for Username

Tìm kiếm hỗ trợ

Tránh các lừa đảo về hỗ trợ. Chúng tôi sẽ không bao giờ yêu cầu bạn gọi hoặc nhắn tin đến số điện thoại hoặc chia sẻ thông tin cá nhân. Vui lòng báo cáo hoạt động đáng ngờ bằng cách sử dụng tùy chọn "Báo cáo lạm dụng".

Tìm hiểu thêm

Chủ đề này đã được lưu trữ. Vui lòng hỏi một câu hỏi mới nếu bạn cần giúp đỡ.

Rendering of images with preserveAspectRatio attribute

  • 1 trả lời
  • 2 gặp vấn đề này
  • 15 lượt xem
  • Trả lời mới nhất được viết bởi cor-el

asturur
asturur
more options

It looks like that rendering of svg with images tags and preserveAspectRaio attribute behaves very different if the image is a png or svg.

I created a svg starting from the example here: http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute

i did this SVG: 

<?xml version="1.0" encoding="UTF-8"?>
  <svg width="450px" height="300px" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" >
  <desc>Example PreserveAspectRatio - illustrates preserveAspectRatio attribute</desc>
  <rect x="1" y="1" width="448" height="298"
        fill="none" stroke="blue"/>
  <g font-size="9">
    <text x="10" y="30">SVG to fit</text>
    <g transform="translate(20,40)"><image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" width="30" height="40" ></image></g>
    <text x="10" y="110">Viewport 1</text>
    <g transform="translate(10,120)"><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/></g>
    <text x="10" y="180">Viewport 2</text>
    <g transform="translate(20,190)"><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/></g>

    <g id="meet-group-1" transform="translate(100, 60)">
      <text x="0" y="-30">--------------- meet ---------------</text>
      <g><text y="-10">xMin*</text><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/>
        <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMinYMin meet" width="50" height="30"></image></g>
      <g transform="translate(70,0)"><text y="-10">xMid*</text><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/>
        <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMidYMid meet" 
             width="50" height="30"></image></g>
      <g transform="translate(0,70)"><text y="-10">xMax*</text><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/>
        <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMaxYMax meet" 
             width="50" height="30"></image></g>
    </g>

    <g id="meet-group-2" transform="translate(250, 60)">
      <text x="0" y="-30">---------- meet ----------</text>
      <g><text y="-10">*YMin</text><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/>
        <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMinYMin meet" 
             width="30" height="60"></image></g>
      <g transform="translate(50, 0)"><text y="-10">*YMid</text><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/>
        <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMidYMid meet" 
             width="30" height="60"></image></g>
      <g transform="translate(100, 0)"><text y="-10">*YMax</text><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/>
        <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMaxYMax meet" 
             width="30" height="60"></image></g>
    </g>

    <g id="slice-group-1" transform="translate(100, 220)">
      <text x="0" y="-30">---------- slice ----------</text>
      <g><text y="-10">xMin*</text><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/>
        <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMinYMin slice" 
             width="30" height="60"></image></g>
      <g transform="translate(50,0)"><text y="-10">xMid*</text><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/>
        <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMidYMid slice" 
             width="30" height="60"></image></g>
      <g transform="translate(100,0)"><text y="-10">xMax*</text><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/>
        <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMaxYMax slice" 
             width="30" height="60"></image></g>
    </g>

    <g id="slice-group-2" transform="translate(250, 220)">
      <text x="0" y="-30">--------------- slice ---------------</text>
      <g><text y="-10">*YMin</text><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/>
        <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMinYMin slice" 
             width="50" height="30"></image></g>
      <g transform="translate(70,0)"><text y="-10">*YMid</text><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/>
        <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMidYMid slice" 
             width="50" height="30"></image></g>
      <g transform="translate(140,0)"><text y="-10">*YMax</text><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/>
        <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMaxYMax slice" 
             width="50" height="30"></image></g>
    </g>   
  </g>
</svg>

It renders bad, images are small and do not respect the preserverAspectRatio attribute.

If i swap in the attribute xlink:href the final .svg with a .png ( other version of same image ) everything works as expected , as the reference image in the link i posted. Every browser render same way, inkscape render it better, respecting the attribute.

Someone knows why?

It looks like that rendering of svg with images tags and preserveAspectRaio attribute behaves very different if the image is a png or svg. I created a svg starting from the example here: http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute i did this SVG: ----------------------------------- <pre><nowiki><?xml version="1.0" encoding="UTF-8"?> <svg width="450px" height="300px" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" > <desc>Example PreserveAspectRatio - illustrates preserveAspectRatio attribute</desc> <rect x="1" y="1" width="448" height="298" fill="none" stroke="blue"/> <g font-size="9"> <text x="10" y="30">SVG to fit</text> <g transform="translate(20,40)"><image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" width="30" height="40" ></image></g> <text x="10" y="110">Viewport 1</text> <g transform="translate(10,120)"><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/></g> <text x="10" y="180">Viewport 2</text> <g transform="translate(20,190)"><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/></g> <g id="meet-group-1" transform="translate(100, 60)"> <text x="0" y="-30">--------------- meet ---------------</text> <g><text y="-10">xMin*</text><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/> <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMinYMin meet" width="50" height="30"></image></g> <g transform="translate(70,0)"><text y="-10">xMid*</text><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/> <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMidYMid meet" width="50" height="30"></image></g> <g transform="translate(0,70)"><text y="-10">xMax*</text><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/> <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMaxYMax meet" width="50" height="30"></image></g> </g> <g id="meet-group-2" transform="translate(250, 60)"> <text x="0" y="-30">---------- meet ----------</text> <g><text y="-10">*YMin</text><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/> <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMinYMin meet" width="30" height="60"></image></g> <g transform="translate(50, 0)"><text y="-10">*YMid</text><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/> <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMidYMid meet" width="30" height="60"></image></g> <g transform="translate(100, 0)"><text y="-10">*YMax</text><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/> <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMaxYMax meet" width="30" height="60"></image></g> </g> <g id="slice-group-1" transform="translate(100, 220)"> <text x="0" y="-30">---------- slice ----------</text> <g><text y="-10">xMin*</text><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/> <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMinYMin slice" width="30" height="60"></image></g> <g transform="translate(50,0)"><text y="-10">xMid*</text><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/> <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMidYMid slice" width="30" height="60"></image></g> <g transform="translate(100,0)"><text y="-10">xMax*</text><rect x='.5' y='.5' width='29' height='59' fill='none' stroke='blue'/> <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMaxYMax slice" width="30" height="60"></image></g> </g> <g id="slice-group-2" transform="translate(250, 220)"> <text x="0" y="-30">--------------- slice ---------------</text> <g><text y="-10">*YMin</text><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/> <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMinYMin slice" width="50" height="30"></image></g> <g transform="translate(70,0)"><text y="-10">*YMid</text><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/> <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMidYMid slice" width="50" height="30"></image></g> <g transform="translate(140,0)"><text y="-10">*YMax</text><rect x='.5' y='.5' width='49' height='29' fill='none' stroke='blue'/> <image xlink:href="http://www.deltalink.it/andreab/fabric/assets/smile.svg" preserveAspectRatio="xMaxYMax slice" width="50" height="30"></image></g> </g> </g> </svg></nowiki></pre> ------------------------- It renders bad, images are small and do not respect the preserverAspectRatio attribute. If i swap in the attribute xlink:href the final .svg with a .png ( other version of same image ) everything works as expected , as the reference image in the link i posted. Every browser render same way, inkscape render it better, respecting the attribute. Someone knows why?

Được chỉnh sửa bởi cor-el vào

Tất cả các câu trả lời (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

The only difference I see between Firefox and Google Chrome is that the images are centered in their view boxes in GC and left aligned in Firefox.

You may have zoomed the page(s) by accident. Reset the page zoom on pages that cause problems.

  • View > Zoom > Reset (Ctrl/Command+0 (zero))

Can you attach a screenshot?

  • Use a compressed image type like PNG or JPG to save the screenshot
  • Make sure that you do not exceed the maximum size of 1 MB

A good place to ask advice about web development is at the mozillaZine "Web Development/Standards Evangelism" forum.

The helpers at that forum are more knowledgeable about web development issues. You need to register at the mozillaZine forum site in order to post at that forum.