The alpha data of the image. <p> Every pixel can have an <em>alpha blending</em> value that varies from 0, meaning fully transparent, to 255 meaning fully opaque. The number of bytes per scanline is 'width'. </p>
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The alpha data of the image. <p> Every pixel can have an <em>alpha blending</em> value that varies from 0, meaning fully transparent, to 255 meaning fully opaque. The number of bytes per scanline is 'width'. </p>