Re: proposed updateBacgroundColor() fix

From: Leonard Rosenthol (
Date: Mon Jul 29 2002 - 12:54:27 EDT

  • Next message: Leonard Rosenthol: "Re: proposed updateBacgroundColor() fix"

    At 3:41 PM +0100 7/29/02, Tomas Frydrych wrote:
    >At the heart of the problem is the fact that our colour classes cannot
    >represent transparent colour. My suggestion is that we change the
    >m_red, m_grn, m_blu members of UT_RGBColor and related from
    >unsigned char to signed short and use -1,-1,-1 as a representation
    >of transparent color. This will do away with the need to re-examine
    >the bgcolor property in fp_Run::updateBackgroundColor().

            Rather than a hack, which would only get you on/off
    transparency - wouldn't it make MORE sense to add a m_alpha member to
    the UT_RGBColor struct? Right now it would only be either 0 or
    MAX_RGB, but in the future you could have full alpha blending...


    Leonard Rosenthol                            <>

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