英语翻译This flag is set when the bitmap has an Alpha channel (that is,per-pixel alpha).Because this API uses premultiplied alpha,the red,green and blue channel values in the bitmap must be premultiplied with the alpha channel value.
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英语翻译This flag is set when the bitmap has an Alpha channel (that is,per-pixel alpha).Because this API uses premultiplied alpha,the red,green and blue channel values in the bitmap must be premultiplied with the alpha channel value.
英语翻译
This flag is set when the bitmap has an Alpha channel (that is,per-pixel alpha).Because this API uses premultiplied alpha,the red,green and blue channel values in the bitmap must be premultiplied with the alpha channel value.
英语翻译This flag is set when the bitmap has an Alpha channel (that is,per-pixel alpha).Because this API uses premultiplied alpha,the red,green and blue channel values in the bitmap must be premultiplied with the alpha channel value.
当位图含有Alpha通道时(即逐像素alpha),此标志被设定.因为该API使用预乘的alpha通道,所以位图中的红、绿、蓝通道值必须与alpha通道值预乘.