/***************************************************************************/
/*                                                                         */
/*  ftmm.c                                                                 */
/*                                                                         */
/*    Multiple Master font support (body).                                 */
/*                                                                         */
/*  Copyright 1996-2000 by                                                 */
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
/*                                                                         */
/*  This file is part of the FreeType project, and may only be used,       */
/*  modified, and distributed under the terms of the FreeType project      */
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
/*  this file you indicate that you have read the license and              */
/*  understand and accept it fully.                                        */
/*                                                                         */
/***************************************************************************/


#include "ftmm.h"
#include "ftobjs.h"


/*************************************************************************/
/*                                                                       */
/* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
/* messages during execution.                                            */
/*                                                                       */
#undef  FT_COMPONENT
#define FT_COMPONENT  trace_mm


/*************************************************************************/
/*                                                                       */
/* <Function>                                                            */
/*    FT_Get_Multi_Master                                                */
/*                                                                       */
/* <Description>                                                         */
/*    Retrieves the Multiple Master descriptor of a given font.          */
/*                                                                       */
/* <Input>                                                               */
/*    face   :: A handle to the source face.                             */
/*                                                                       */
/* <Output>                                                              */
/*    master :: The Multiple Masters descriptor.                         */
/*                                                                       */
/* <Return>                                                              */
/*    FreeType error code.  0 means success.                             */
/*                                                                       */
FT_EXPORT_FUNC( FT_Error )  FT_Get_Multi_Master( FT_Face face,
												 FT_Multi_Master *  master )
{
	FT_Error error;


	if ( !face ) {
		return FT_Err_Invalid_Face_Handle;
	}

	error = FT_Err_Invalid_Argument;

	if ( FT_HAS_MULTIPLE_MASTERS( face ) ) {
		FT_Driver driver = face->driver;
		FT_Get_MM_Func func;


		func = (FT_Get_MM_Func)driver->root.clazz->get_interface(
			FT_MODULE( driver ), "get_mm" );
		if ( func ) {
			error = func( face, master );
		}
	}

	return error;
}


/*************************************************************************/
/*                                                                       */
/* <Function>                                                            */
/*    FT_Set_MM_Design_Coordinates                                       */
/*                                                                       */
/* <Description>                                                         */
/*    For Multiple Masters fonts, choose an interpolated font design     */
/*    through design coordinates.                                        */
/*                                                                       */
/* <Input>                                                               */
/*    face       :: A handle to the source face.                         */
/*                                                                       */
/*    num_coords :: The number of design coordinates (must be equal to   */
/*                  the number of axes in the font).                     */
/*                                                                       */
/*    coords     :: The design coordinates.                              */
/*                                                                       */
/* <Return>                                                              */
/*    FreeType error code.  0 means success.                             */
/*                                                                       */
FT_EXPORT_FUNC( FT_Error )  FT_Set_MM_Design_Coordinates(
	FT_Face face,
	FT_UInt num_coords,
	FT_Long *  coords )
{
	FT_Error error;


	if ( !face ) {
		return FT_Err_Invalid_Face_Handle;
	}

	error = FT_Err_Invalid_Argument;

	if ( FT_HAS_MULTIPLE_MASTERS( face ) ) {
		FT_Driver driver = face->driver;
		FT_Set_MM_Design_Func func;


		func = (FT_Set_MM_Design_Func)driver->root.clazz->get_interface(
			FT_MODULE( driver ), "set_mm_design" );
		if ( func ) {
			error = func( face, num_coords, coords );
		}
	}

	return error;
}


/*************************************************************************/
/*                                                                       */
/* <Function>                                                            */
/*    FT_Set_MM_Blend_Coordinates                                        */
/*                                                                       */
/* <Description>                                                         */
/*    For Multiple Masters fonts, choose an interpolated font design     */
/*    through normalized blend coordinates.                              */
/*                                                                       */
/* <Input>                                                               */
/*    face       :: A handle to the source face.                         */
/*                                                                       */
/*    num_coords :: The number of design coordinates (must be equal to   */
/*                  the number of axes in the font).                     */
/*                                                                       */
/*    coords     :: The design coordinates (each one must be between 0   */
/*                  and 1.0).                                            */
/*                                                                       */
/* <Return>                                                              */
/*    FreeType error code.  0 means success.                             */
/*                                                                       */
FT_EXPORT_FUNC( FT_Error )  FT_Set_MM_Blend_Coordinates(
	FT_Face face,
	FT_UInt num_coords,
	FT_Fixed *  coords )
{
	FT_Error error;


	if ( !face ) {
		return FT_Err_Invalid_Face_Handle;
	}

	error = FT_Err_Invalid_Argument;

	if ( FT_HAS_MULTIPLE_MASTERS( face ) ) {
		FT_Driver driver = face->driver;
		FT_Set_MM_Blend_Func func;


		func = (FT_Set_MM_Blend_Func)driver->root.clazz->get_interface(
			FT_MODULE( driver ), "set_mm_blend" );
		if ( func ) {
			error = func( face, num_coords, coords );
		}
	}

	return error;
}


/* END */
