Web design portfolio - 292 CHAPTER 7 FILTERS AND EFFECTS If
292 CHAPTER 7 FILTERS AND EFFECTS If you specified no spacing between table elements, don t be too surprised if the web page looks like the original image. It should! Nothing has been deleted from the image; it has merely been split with a very sharp knife. The act of splitting up an image following the position of the guides is known as a guillotine operation. If you just want to split up one image into several smaller images, but you don t need an HTML table, Image . Transform . Guillotine is for you. It will open all the new images in GIMP, and you can take it from there. The final filter in GIMP s Web menu is Semi-Flatten (in some versions it can be found in Filters . Colors). Semi-Flatten provides a solution for browsers such as Internet Explorer that don t support full PNG transparency. Semi-Flatten will preserve areas of full transparency, but pixels that are only partially transparent will be given some combination of their current color and the background color. Before you use this plug-in, be sure to set the background color to match the page where the image will go. Animation Helpers The Filters . Animation menu offers optimizers to make your animated image more efficient. Optimize (for GIF) was discussed in the animation project at the end of Chapter 3: it attempts to reduce GIF file size, and adds layer names that help you control the speed of the animation. Optimize (Difference) performs more general optimizations, not specifically targeted at GIF animations. UnOptimize removes some of the optimizations that the other filters add; this can simplify layer names. Playback is the way to preview an animation in GIMP. The Animators menu offers a few filters that create animated images for you. Each of these starts from one or more existing layers and creates a new animated image. Blend makes an animation that gradually fades between the layers of the current image. Burn-in takes an image that consists of two layers a text layer and a background layer and creates an effect of the text being burned into the background, letter by letter. Rippling and Waves each make an image look as though it s being viewed through rippling water. Waves is the better effect, though you ll want to run it on an image that has only one layer. Rippling works on the active layer and ignores any others. Spinning Globe wraps your image around a globe and then rotates the globe. It works best on an image with a single layer: if there are multiple layers, you ll see flashes as the animation switches layers, but only one layer will be animated. It also works best if your image is tileable, or at least if the left and right edges join together smoothly. Alpha to Logo The Alpha to Logo scripts (in the Script-Fu menu of GIMP versions prior to 2.4) create interesting effects from a text layer (or any other layer with transparency). If you want some text in a fancy style, try some of these scripts! Figure 7-35 shows the collection, though of course they all have options to let you change fonts, colors, and other aspects of the effect. All these logo scripts are also available in the Xtns . Logos menu of the Toolbox (in earlier versions, Xtns . Script-Fu . Logos). If you don t already have a layer you want to use, the Toolbox versions will create a brand-new image containing your fancy text.
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