25 lines
807 B
HTML
25 lines
807 B
HTML
---
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template: example.html
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title: Image Filter Example
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shortdesc: Apply a filter to imagery
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docs: >
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<p>Layer rendering can be manipulated in <code>precompose</code> and <code>postcompose</code> event listeners.
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These listeners get an event with a reference to the Canvas rendering context.
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In this example, the <code>postcompose</code> listener applies a filter to the image data.</p>
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tags: "filter, image manipulation"
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---
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<div class="row-fluid">
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<div class="span12">
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<div id="map" class="map"></div>
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</div>
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</div>
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<select id="kernel" name="kernel">
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<option>none</option>
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<option selected>sharpen</option>
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<option value="sharpenless">sharpen less</option>
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<option>blur</option>
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<option>shadow</option>
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<option>emboss</option>
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<option value="edge">edge detect</option>
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</select>
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