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/****************************************************************************
*
* ftcolor.c
*
* FreeType's glyph color management (body).
*
* Copyright (C) 2018-2022 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 <freetype/internal/ftdebug.h>
#include <freetype/internal/sfnt.h>
#include <freetype/internal/tttypes.h>
#include <freetype/ftcolor.h>
#ifdef TT_CONFIG_OPTION_COLOR_LAYERS
static
const FT_Palette_Data null_palette_data = { 0, NULL, NULL, 0, NULL };
/* documentation is in ftcolor.h */
FT_EXPORT_DEF( FT_Error )
FT_Palette_Data_Get( FT_Face face,
FT_Palette_Data *apalette_data )
{
if ( !face )
return FT_THROW( Invalid_Face_Handle );
if ( !apalette_data )
return FT_THROW( Invalid_Argument );
if ( FT_IS_SFNT( face ) )
*apalette_data = ( (TT_Face)face )->palette_data;
else
*apalette_data = null_palette_data;
return FT_Err_Ok;
}
/* documentation is in ftcolor.h */
FT_EXPORT_DEF( FT_Error )
FT_Palette_Select( FT_Face face,
FT_UShort palette_index,
FT_Color* *apalette )
{
FT_Error error;
TT_Face ttface;
SFNT_Service sfnt;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
if ( !FT_IS_SFNT( face ) )
{
if ( apalette )
*apalette = NULL;
return FT_Err_Ok;
}
ttface = (TT_Face)face;
sfnt = (SFNT_Service)ttface->sfnt;
error = sfnt->set_palette( ttface, palette_index );
if ( error )
return error;
ttface->palette_index = palette_index;
if ( apalette )
*apalette = ttface->palette;
return FT_Err_Ok;
}
/* documentation is in ftcolor.h */
FT_EXPORT_DEF( FT_Error )
FT_Palette_Set( FT_Face face,
FT_Int index,
FT_Color* palette )
{
TT_Face ttface;
FT_UShort i;
if ( !face || !FT_IS_SFNT( face ) )
return FT_THROW( Invalid_Face_Handle );
if ( !palette || index >= 0 )
return FT_THROW( Invalid_Argument );
ttface = (TT_Face)face;
for ( i = 0; i < ttface->palette_data.num_palette_entries; i++ )
ttface->palette[i] = palette[i];
ttface->palette_index = index;
return FT_Err_Ok;
}
/* documentation is in ftcolor.h */
FT_EXPORT_DEF( FT_Error )
FT_Palette_Get( FT_Face face,
FT_Int *anindex,
FT_Color* *apalette )
{
TT_Face ttface;
if ( !face || !FT_IS_SFNT( face ) )
return FT_THROW( Invalid_Face_Handle );
ttface = (TT_Face)face;
if ( anindex )
*anindex = ttface->palette_index;
if ( apalette )
*apalette = ttface->palette;
return FT_Err_Ok;
}
/* documentation is in ftcolor.h */
FT_EXPORT_DEF( FT_Error )
FT_Palette_Set_Foreground_Color( FT_Face face,
FT_Color foreground_color )
{
TT_Face ttface;
if ( !face )
return FT_THROW( Invalid_Face_Handle );
if ( !FT_IS_SFNT( face ) )
return FT_Err_Ok;
ttface = (TT_Face)face;
ttface->foreground_color = foreground_color;
ttface->have_foreground_color = 1;
return FT_Err_Ok;
}
/* documentation is in ftcolor.h */
FT_EXPORT_DEF( FT_Error )
FT_Palette_Get_Foreground_Color( FT_Face face,
FT_Color* aforeground_color )
{
TT_Face ttface;
FT_Color white = { 0xFF, 0xFF, 0xFF, 0xFF };
FT_Color black = { 0x00, 0x00, 0x00, 0xFF };
if ( !face || !FT_IS_SFNT( face ) )
return FT_THROW( Invalid_Face_Handle );
if ( !aforeground_color )
return FT_THROW( Invalid_Argument );
ttface = (TT_Face)face;
if ( ttface->have_foreground_color )
*aforeground_color = ttface->foreground_color;
else if ( ttface->palette_index < 0 )
*aforeground_color = black;
else
{
if ( ttface->palette_data.palette_flags &&
( ttface->palette_data.palette_flags[ttface->palette_index] &
FT_PALETTE_FOR_DARK_BACKGROUND ) )
*aforeground_color = white;
else
*aforeground_color = black;
}
return FT_Err_Ok;
}
#else /* !TT_CONFIG_OPTION_COLOR_LAYERS */
FT_EXPORT_DEF( FT_Error )
FT_Palette_Data_Get( FT_Face face,
FT_Palette_Data *apalette_data )
{
FT_UNUSED( face );
FT_UNUSED( apalette_data );
return FT_THROW( Unimplemented_Feature );
}
FT_EXPORT_DEF( FT_Error )
FT_Palette_Select( FT_Face face,
FT_UShort palette_index,
FT_Color* *apalette )
{
FT_UNUSED( face );
FT_UNUSED( palette_index );
FT_UNUSED( apalette );
return FT_THROW( Unimplemented_Feature );
}
FT_EXPORT_DEF( FT_Error )
FT_Palette_Set( FT_Face face,
FT_Int index,
FT_Color* palette )
{
FT_UNUSED( face );
FT_UNUSED( index );
FT_UNUSED( palette );
return FT_THROW( Unimplemented_Feature );
}
FT_EXPORT_DEF( FT_Error )
FT_Palette_Get( FT_Face face,
FT_Int *anindex,
FT_Color* *apalette )
{
FT_UNUSED( face );
FT_UNUSED( anindex );
FT_UNUSED( apalette );
return FT_THROW( Unimplemented_Feature );
}
FT_EXPORT_DEF( FT_Error )
FT_Palette_Set_Foreground_Color( FT_Face face,
FT_Color foreground_color )
{
FT_UNUSED( face );
FT_UNUSED( foreground_color );
return FT_THROW( Unimplemented_Feature );
}
FT_EXPORT_DEF( FT_Error )
FT_Palette_Get_Foreground_Color( FT_Face face,
FT_Color* aforeground_color )
{
FT_UNUSED( face );
FT_UNUSED( aforeground_color );
return FT_THROW( Unimplemented_Feature );
}
#endif /* !TT_CONFIG_OPTION_COLOR_LAYERS */
/* END */
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