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/PHP-7.2/ext/gd/libgd/
H A Dgd.c2551 double alpha_factor, alpha_sum = 0.0, contrib_sum = 0.0; in gdImageCopyResampled() local
2587 alpha_factor = ((gdAlphaMax - gdTrueColorGetAlpha(p))) * pcontribution; in gdImageCopyResampled()
2588 red += gdTrueColorGetRed (p) * alpha_factor; in gdImageCopyResampled()
2589 green += gdTrueColorGetGreen (p) * alpha_factor; in gdImageCopyResampled()
2590 blue += gdTrueColorGetBlue (p) * alpha_factor; in gdImageCopyResampled()
2592 alpha_sum += alpha_factor; in gdImageCopyResampled()

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