forked from minhngoc25a/freetype2
286 lines
6.2 KiB
C
286 lines
6.2 KiB
C
/****************************************************************************
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*
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* ftcolor.c
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*
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* FreeType's glyph color management (body).
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*
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* Copyright (C) 2018-2022 by
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* David Turner, Robert Wilhelm, and Werner Lemberg.
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*
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* This file is part of the FreeType project, and may only be used,
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* modified, and distributed under the terms of the FreeType project
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* license, LICENSE.TXT. By continuing to use, modify, or distribute
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* this file you indicate that you have read the license and
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* understand and accept it fully.
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*
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*/
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#include <freetype/internal/ftdebug.h>
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#include <freetype/internal/sfnt.h>
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#include <freetype/internal/tttypes.h>
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#include <freetype/ftcolor.h>
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#ifdef TT_CONFIG_OPTION_COLOR_LAYERS
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static
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const FT_Palette_Data null_palette_data = { 0, NULL, NULL, 0, NULL };
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/* documentation is in ftcolor.h */
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FT_EXPORT_DEF( FT_Error )
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FT_Palette_Data_Get( FT_Face face,
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FT_Palette_Data *apalette_data )
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{
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if ( !face )
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return FT_THROW( Invalid_Face_Handle );
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if ( !apalette_data )
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return FT_THROW( Invalid_Argument );
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if ( FT_IS_SFNT( face ) )
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*apalette_data = ( (TT_Face)face )->palette_data;
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else
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*apalette_data = null_palette_data;
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return FT_Err_Ok;
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}
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/* documentation is in ftcolor.h */
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FT_EXPORT_DEF( FT_Error )
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FT_Palette_Select( FT_Face face,
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FT_UShort palette_index,
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FT_Color* *apalette )
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{
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FT_Error error;
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TT_Face ttface;
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SFNT_Service sfnt;
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if ( !face )
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return FT_THROW( Invalid_Face_Handle );
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if ( !FT_IS_SFNT( face ) )
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{
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if ( apalette )
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*apalette = NULL;
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return FT_Err_Ok;
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}
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ttface = (TT_Face)face;
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sfnt = (SFNT_Service)ttface->sfnt;
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error = sfnt->set_palette( ttface, palette_index );
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if ( error )
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return error;
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ttface->palette_index = palette_index;
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if ( apalette )
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*apalette = ttface->palette;
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return FT_Err_Ok;
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}
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/* documentation is in ftcolor.h */
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FT_EXPORT_DEF( FT_Error )
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FT_Palette_Set( FT_Face face,
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FT_Int index,
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FT_Color* palette )
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{
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TT_Face ttface;
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FT_UShort i;
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if ( !face || !FT_IS_SFNT( face ) )
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return FT_THROW( Invalid_Face_Handle );
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if ( !palette || index >= 0 )
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return FT_THROW( Invalid_Argument );
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ttface = (TT_Face)face;
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for ( i = 0; i < ttface->palette_data.num_palette_entries; i++ )
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ttface->palette[i] = palette[i];
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ttface->palette_index = index;
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return FT_Err_Ok;
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}
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/* documentation is in ftcolor.h */
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FT_EXPORT_DEF( FT_Error )
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FT_Palette_Get( FT_Face face,
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FT_Int *anindex,
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FT_Color* *apalette )
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{
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TT_Face ttface;
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if ( !face || !FT_IS_SFNT( face ) )
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return FT_THROW( Invalid_Face_Handle );
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ttface = (TT_Face)face;
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if ( anindex )
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*anindex = ttface->palette_index;
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if ( apalette )
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*apalette = ttface->palette;
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return FT_Err_Ok;
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}
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/* documentation is in ftcolor.h */
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FT_EXPORT_DEF( FT_Error )
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FT_Palette_Set_Foreground_Color( FT_Face face,
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FT_Color foreground_color )
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{
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TT_Face ttface;
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if ( !face )
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return FT_THROW( Invalid_Face_Handle );
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if ( !FT_IS_SFNT( face ) )
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return FT_Err_Ok;
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ttface = (TT_Face)face;
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ttface->foreground_color = foreground_color;
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ttface->have_foreground_color = 1;
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return FT_Err_Ok;
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}
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/* documentation is in ftcolor.h */
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FT_EXPORT_DEF( FT_Error )
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FT_Palette_Get_Foreground_Color( FT_Face face,
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FT_Color* aforeground_color )
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{
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TT_Face ttface;
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FT_Color white = { 0xFF, 0xFF, 0xFF, 0xFF };
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FT_Color black = { 0x00, 0x00, 0x00, 0xFF };
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if ( !face || !FT_IS_SFNT( face ) )
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return FT_THROW( Invalid_Face_Handle );
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if ( !aforeground_color )
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return FT_THROW( Invalid_Argument );
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ttface = (TT_Face)face;
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if ( ttface->have_foreground_color )
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*aforeground_color = ttface->foreground_color;
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else if ( ttface->palette_index < 0 )
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*aforeground_color = black;
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else
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{
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if ( ttface->palette_data.palette_flags &&
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( ttface->palette_data.palette_flags[ttface->palette_index] &
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FT_PALETTE_FOR_DARK_BACKGROUND ) )
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*aforeground_color = white;
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else
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*aforeground_color = black;
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}
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return FT_Err_Ok;
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}
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#else /* !TT_CONFIG_OPTION_COLOR_LAYERS */
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FT_EXPORT_DEF( FT_Error )
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FT_Palette_Data_Get( FT_Face face,
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FT_Palette_Data *apalette_data )
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{
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FT_UNUSED( face );
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FT_UNUSED( apalette_data );
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return FT_THROW( Unimplemented_Feature );
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}
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FT_EXPORT_DEF( FT_Error )
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FT_Palette_Select( FT_Face face,
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FT_UShort palette_index,
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FT_Color* *apalette )
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{
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FT_UNUSED( face );
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FT_UNUSED( palette_index );
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FT_UNUSED( apalette );
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return FT_THROW( Unimplemented_Feature );
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}
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FT_EXPORT_DEF( FT_Error )
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FT_Palette_Set( FT_Face face,
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FT_Int index,
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FT_Color* palette )
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{
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FT_UNUSED( face );
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FT_UNUSED( index );
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FT_UNUSED( palette );
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return FT_THROW( Unimplemented_Feature );
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}
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FT_EXPORT_DEF( FT_Error )
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FT_Palette_Get( FT_Face face,
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FT_Int *anindex,
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FT_Color* *apalette )
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{
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FT_UNUSED( face );
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FT_UNUSED( anindex );
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FT_UNUSED( apalette );
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return FT_THROW( Unimplemented_Feature );
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}
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FT_EXPORT_DEF( FT_Error )
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FT_Palette_Set_Foreground_Color( FT_Face face,
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FT_Color foreground_color )
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{
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FT_UNUSED( face );
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FT_UNUSED( foreground_color );
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return FT_THROW( Unimplemented_Feature );
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}
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FT_EXPORT_DEF( FT_Error )
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FT_Palette_Get_Foreground_Color( FT_Face face,
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FT_Color* aforeground_color )
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{
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FT_UNUSED( face );
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FT_UNUSED( aforeground_color );
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return FT_THROW( Unimplemented_Feature );
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}
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#endif /* !TT_CONFIG_OPTION_COLOR_LAYERS */
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/* END */
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