9: IMAGES in VS .NET

Maker QR Code ISO/IEC18004 in VS .NET 9: IMAGES
CHAPTER 9: IMAGES
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<body style= background-color:#BAD9CB > <!-- Safari, Chrome and Opera --> <img src= logo500x400.svg width=100 height=80> <img src= logo500x400.svg width=200 height=160> <img src= logo500x400.svg width=300 height=240><br> <img src= logo500x400.svg width=500 height=400> <!-- Firefox and Opera <object width=100 height=80 type= image/svg+xml data= logo500x400.svg ></object> <object width=200 height=160 type= image/svg+xml data= logo500x400.svg ></object> <object width=300 height=240 type= image/svg+xml data= logo500x400.svg ></ object><br> <object width=500 height=400 type= image/svg+xml data= logo500x400.svg ></object> --> </body> </html>
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At the time of this writing, Firefox did not use the <img> tag with .svg files but required the <object> tag instead. The Opera browser worked with both formats. Figure 9-10 shows the results. As you can see, the logo in Figure 9-10 looks the same no matter what size it s displayed in.
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Figure 9-10: An SVG image changed by changing attributes with no distortion.
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PART III: MEDIA IN HTML5
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Grayscale on Internet Explorer
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One interesting note in working through file sizes is the use of a special CSS property recognized only by Internet Explorer. Some designers use grayscale settings to reduce the size of their graphics or for the effect of grayscale. If you want an interesting option using Microsoft Internet Explorer, you can write a little CSS code to convert color files to grayscale. Use the following snippet in a style definition:
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<style type= text/css > img { filter:gray; } </style>
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Figure 9-11 shows a color figure (Figure 9-8) that is turned into a grayscale using CSS only.
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Figure 9-11: Using Internet Explorer CSS grayscale lter.
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Using this technique is a quick way to see how the figure looks in a grayscale before rendering it in a grayscale mode. If you re updating a site, and you want to view the images on the page in grayscale, you can add the CSS and test it on Internet Explorer first. If you want to keep the file size down and the quality up, a JPEG image in grayscale instead of color will cut the file size in half.
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CHAPTER 9: IMAGES
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PLACING IMAGES AND CREATING FLEXIBLE WEB PAGES
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The <img> tag is the primary one used to call up graphics, and although CSS3 is the primary tool for getting things to go where you want on a Web page, you can use certain <img> attributes to help out. This section examines options you have for placing text where you want it to go on your Web page and how to use certain key attributes with the <img> tag.
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IMAGE PLACEMENT WITH THE ALIGN ATTRIBUTE
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To start looking at placement, consider the align attribute of the <img> tag. The one advantage is that there is no easier way to quickly position the image relative to the text. The following script (ImagePlacement.html in this chapter s folder at www.wiley.com/ go/smashinghtml5) illustrates this.
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<!DOCTYPE HTML> <html> <head> <style type= text/css > /*048ABF,049DBF,F2F2F2,595959,0D0D0D*/ body { background-color:#F2F2F2; color:#0D0D0D; font-family:Verdana, Geneva, sans-serif; } h1 { font-family: Trebuchet MS , Arial, Helvetica, sans-serif; color:#595959; background-color:#049DBF; text-align:center; } h2 { color:#048ABF; } </style> <meta http-equiv= Content-Type content= text/html; charset=UTF-8 > <title>Simple Placement</title> </head> <body> <article> <header> <h1>Web Developer s Gym</h1> </header> <section> <header> <h2>Developer s Workout</h2> </header> <figure> <img src= webDeveloper.gif width= 250 height= 263 align= left align= workout > </figure>
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PART III: MEDIA IN HTML5
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You know you ve been thinking about it. Isn t it about time you started working on your <alt> and tags Build up your elements and attributes in HTML5 at the Web Developer s Gym. Once you get going, you can add a little <canvas> tag work and get into some serious CSS3. The gym is open 24/7 for your convenience and you can access it anywhere worldwide! All your friends have joined, and just look at them they re even adding video to their Web pages! You can do it, too! Don t let another day go by with you wishing that you could be a Web developer. Start today! </section> </article> </body> </html>
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The right and left placement of the image is simple. All that s required is the assignment of left and right values to the align attribute. Figure 9-12 shows the placement of the image in both the left and right positions.
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