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plug-ins/common/file-jp2-load: Check for other kinds of alpha components
ImageMagick seems to write out the 'matte' component (number 3).
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@ -267,6 +267,11 @@ load_image (const gchar *filename,
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return -1;
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}
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components[3] = jas_image_getcmptbytype (image, JAS_IMAGE_CT_OPACITY);
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/* ImageMagick seems to write out the 'matte' component (number 3) */
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if (components[3] == -1)
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components[3] = jas_image_getcmptbytype (image, 3);
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if (components[3] != -1)
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{
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num_components = 4;
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