/***************************************************************************//*                                                                         *//*  ftsmooth.c                                                             *//*                                                                         *//*    Anti-aliasing renderer interface (body).                             *//*                                                                         *//*  Copyright 2000-2001, 2002 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 <ft2build.h>#include FT_INTERNAL_OBJECTS_H#include FT_OUTLINE_H#include "ftsmooth.h"#include "ftgrays.h"#include "ftsmerrs.h"  /* initialize renderer -- init its raster */  static FT_Error  ft_smooth_init( FT_Renderer  render )  {    FT_Library  library = FT_MODULE_LIBRARY( render );    render->clazz->raster_class->raster_reset( render->raster,                                               library->raster_pool,                                               library->raster_pool_size );    return 0;  }  /* sets render-specific mode */  static FT_Error  ft_smooth_set_mode( FT_Renderer  render,                      FT_ULong     mode_tag,                      FT_Pointer   data )  {    /* we simply pass it to the raster */    return render->clazz->raster_class->raster_set_mode( render->raster,                                                         mode_tag,                                                         data );  }  /* transform a given glyph image */  static FT_Error  ft_smooth_transform( FT_Renderer   render,                       FT_GlyphSlot  slot,                       FT_Matrix*    matrix,                       FT_Vector*    delta )  {    FT_Error  error = Smooth_Err_Ok;    if ( slot->format != render->glyph_format )    {      error = Smooth_Err_Invalid_Argument;      goto Exit;    }    if ( matrix )      FT_Outline_Transform( &slot->outline, matrix );    if ( delta )      FT_Outline_Translate( &slot->outline, delta->x, delta->y );  Exit:    return error;  }  /* return the glyph's control box */  static void  ft_smooth_get_cbox( FT_Renderer   render,                      FT_GlyphSlot  slot,                      FT_BBox*      cbox )  {    FT_MEM_SET( cbox, 0, sizeof ( *cbox ) );    if ( slot->format == render->glyph_format )      FT_Outline_Get_CBox( &slot->outline, cbox );  }  /* convert a slot's glyph image into a bitmap */  static FT_Error  ft_smooth_render( FT_Renderer   render,                    FT_GlyphSlot  slot,                    FT_UInt       mode,                    FT_Vector*    origin )  {    FT_Error     error;    FT_Outline*  outline = NULL;    FT_BBox      cbox;    FT_UInt      width, height, pitch;    FT_Bitmap*   bitmap;    FT_Memory    memory;    FT_Raster_Params  params;    /* check glyph image format */    if ( slot->format != render->glyph_format )    {      error = Smooth_Err_Invalid_Argument;      goto Exit;    }    /* check mode */    if ( mode != ft_render_mode_normal )      return Smooth_Err_Cannot_Render_Glyph;    outline = &slot->outline;    /* translate the outline to the new origin if needed */    if ( origin )      FT_Outline_Translate( outline, origin->x, origin->y );    /* compute the control box, and grid fit it */    FT_Outline_Get_CBox( outline, &cbox );    cbox.xMin &= -64;    cbox.yMin &= -64;    cbox.xMax  = ( cbox.xMax + 63 ) & -64;    cbox.yMax  = ( cbox.yMax + 63 ) & -64;    width  = ( cbox.xMax - cbox.xMin ) >> 6;    height = ( cbox.yMax - cbox.yMin ) >> 6;    bitmap = &slot->bitmap;    memory = render->root.memory;    /* release old bitmap buffer */    if ( slot->flags & FT_GLYPH_OWN_BITMAP )    {      FT_FREE( bitmap->buffer );      slot->flags &= ~FT_GLYPH_OWN_BITMAP;    }    /* allocate new one, depends on pixel format */    pitch = width;    bitmap->pixel_mode = ft_pixel_mode_grays;    bitmap->num_grays  = 256;    bitmap->width      = width;    bitmap->rows       = height;    bitmap->pitch      = pitch;    if ( FT_ALLOC( bitmap->buffer, (FT_ULong)pitch * height ) )      goto Exit;    slot->flags |= FT_GLYPH_OWN_BITMAP;    /* translate outline to render it into the bitmap */    FT_Outline_Translate( outline, -cbox.xMin, -cbox.yMin );    /* set up parameters */    params.target = bitmap;    params.source = outline;    params.flags  = ft_raster_flag_aa;    /* render outline into the bitmap */    error = render->raster_render( render->raster, &params );        FT_Outline_Translate( outline, cbox.xMin, cbox.yMin );    if ( error )      goto Exit;    slot->format      = ft_glyph_format_bitmap;    slot->bitmap_left = cbox.xMin >> 6;    slot->bitmap_top  = cbox.yMax >> 6;  Exit:    if ( outline && origin )      FT_Outline_Translate( outline, -origin->x, -origin->y );    return error;  }  FT_CALLBACK_TABLE_DEF  const FT_Renderer_Class  ft_smooth_renderer_class =  {    {      ft_module_renderer,      sizeof( FT_RendererRec ),      "smooth",      0x10000L,      0x20000L,      0,    /* module specific interface */      (FT_Module_Constructor)ft_smooth_init,      (FT_Module_Destructor) 0,      (FT_Module_Requester)  0    },    ft_glyph_format_outline,    (FTRenderer_render)   ft_smooth_render,    (FTRenderer_transform)ft_smooth_transform,    (FTRenderer_getCBox)  ft_smooth_get_cbox,    (FTRenderer_setMode)  ft_smooth_set_mode,    (FT_Raster_Funcs*)    &ft_grays_raster  };/* END */