devcolor.h

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// $Id: devcolor.h 751 2006-03-31 15:43:49Z alex $
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 */
// devcolor.h - Interface between kernel DocColours and ColourContexts and the
// outside world. Currently this is a very thin veneer over functions supplied
// in the RGBT colour context, but this may change in ported versions of Camelot
// and/or as other output devices are supoprted by the rendering subsystem.


#ifndef INC_DEVCOLOR
#define INC_DEVCOLOR


#include "colcontx.h"

/****************************************************************************

>   inline DWORD ConvertColourToScreenWord(ColourContext *cc, DocColour *col)

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    28/4/94

    Inputs:     cc  - An *RGBT* colourContext for screen output
                col - The Colour to be converted
    Outputs:    -
    Returns:    An RGB value suitable for passing to the host OS
                - In this case, an rgb DWORD as used by Windows GDI (0x00BBGGRR)

    Purpose:    Converts the given DocColour into the given screen (RGB) output
                context for whatever host OS we are running under. This function
                does NOT include any transparency information in the result.

    Notes:      Note that to save poking about in the internal DocColour
                representations, a function is supplied by the ColourContextRGBT
                class which just happens (!) to suit our needs. However, I've
                wrapped the call up in this WinOil veneer so that on other OS's
                it will not be necessary to touch that kernel code (just write
                equivalent code to go into here)

****************************************************************************/

inline DWORD ConvertColourToScreenWord(ColourContext *cc, DocColour *col)
{
    return( ((ColourContextRGBT *)cc)->ConvertToScreenWord(col) );
}



/****************************************************************************

>   inline DWORD ConvertColourToTransScreenWord(ColourContext *cc, DocColour *col)

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    28/4/94

    Inputs:     cc  - An *RGBT* colourContext for screen output
                col - The Colour to be converted
    Outputs:    -
    Returns:    An RGB value suitable for passing to the host OS
                - In this case, an rgb DWORD as used by GAVIN (0xTTBBGGRR)
                NOTE that this word must NOT be passed to Windows GDI, as GDI
                uses the MS byte in a different manner to Gavin.

    Purpose:    Converts the given DocColour into the given screen (RGB) output
                context for whatever host OS we are running under, including
                the transparent component as well.

    Notes:      Note that to save poking about in the internal DocColour
                representations, a function is supplied by the ColourContextRGBT
                class which just happens (!) to suit our needs. However, I've
                wrapped the call up in this WinOil veneer so that on other OS's
                it will not be necessary to touch that kernel code (just write
                equivalent code to go into here)

****************************************************************************/

inline DWORD ConvertColourToTransScreenWord(ColourContext *cc, DocColour *col)
{
    return( ((ColourContextRGBT *)cc)->ConvertToTransparentScreenWord(col) );
}

#endif

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