/***************************************************************************//*                                                                         *//*  ftsmooth.c                                                             *//*                                                                         *//*    Anti-aliasing renderer interface (body).                             *//*                                                                         *//*  Copyright 2000-2001, 2002, 2003, 2004, 2005 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,                       const FT_Matrix*  matrix,                       const 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_ZERO( cbox, 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_generic( FT_Renderer       render,                            FT_GlyphSlot      slot,                            FT_Render_Mode    mode,                            const FT_Vector*  origin,                            FT_Render_Mode    required_mode,                            FT_Int            hmul,                            FT_Int            vmul )  {    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 != required_mode )      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 = FT_PIX_FLOOR( cbox.xMin );    cbox.yMin = FT_PIX_FLOOR( cbox.yMin );    cbox.xMax = FT_PIX_CEIL( cbox.xMax );    cbox.yMax = FT_PIX_CEIL( cbox.yMax );    width  = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 );    height = (FT_UInt)( ( cbox.yMax - cbox.yMin ) >> 6 );    bitmap = &slot->bitmap;    memory = render->root.memory;    /* release old bitmap buffer */    if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP )    {      FT_FREE( bitmap->buffer );      slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP;    }    /* allocate new one, depends on pixel format */    pitch = width;    if ( hmul )    {      width = width * hmul;      pitch = FT_PAD_CEIL( width, 4 );    }    if ( vmul )      height *= vmul;    bitmap->pixel_mode = FT_PIXEL_MODE_GRAY;    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->internal->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;    /* implode outline if needed */    {      FT_Int      n;      FT_Vector*  vec;      if ( hmul )        for ( vec = outline->points, n = 0; n < outline->n_points; n++, vec++ )          vec->x *= hmul;      if ( vmul )        for ( vec = outline->points, n = 0; n < outline->n_points; n++, vec++ )          vec->y *= vmul;    }    /* render outline into the bitmap */    error = render->raster_render( render->raster, &params );    /* deflate outline if needed */    {      FT_Int      n;      FT_Vector*  vec;      if ( hmul )        for ( vec = outline->points, n = 0; n < outline->n_points; n++, vec++ )          vec->x /= hmul;      if ( vmul )        for ( vec = outline->points, n = 0; n < outline->n_points; n++, vec++ )          vec->y /= vmul;    }    FT_Outline_Translate( outline, cbox.xMin, cbox.yMin );    if ( error )      goto Exit;    slot->format      = FT_GLYPH_FORMAT_BITMAP;    slot->bitmap_left = (FT_Int)( cbox.xMin >> 6 );    slot->bitmap_top  = (FT_Int)( cbox.yMax >> 6 );  Exit:    if ( outline && origin )      FT_Outline_Translate( outline, -origin->x, -origin->y );    return error;  }  /* convert a slot's glyph image into a bitmap */  static FT_Error  ft_smooth_render( FT_Renderer       render,                    FT_GlyphSlot      slot,                    FT_Render_Mode    mode,                    const FT_Vector*  origin )  {    if ( mode == FT_RENDER_MODE_LIGHT )      mode = FT_RENDER_MODE_NORMAL;    return ft_smooth_render_generic( render, slot, mode, origin,                                     FT_RENDER_MODE_NORMAL,                                     0, 0 );  }  /* convert a slot's glyph image into a horizontal LCD bitmap */  static FT_Error  ft_smooth_render_lcd( FT_Renderer       render,                        FT_GlyphSlot      slot,                        FT_Render_Mode    mode,                        const FT_Vector*  origin )  {    FT_Error  error;    error = ft_smooth_render_generic( render, slot, mode, origin,                                      FT_RENDER_MODE_LCD,                                      3, 0 );    if ( !error )      slot->bitmap.pixel_mode = FT_PIXEL_MODE_LCD;    return error;  }  /* convert a slot's glyph image into a vertical LCD bitmap */  static FT_Error  ft_smooth_render_lcd_v( FT_Renderer       render,                          FT_GlyphSlot      slot,                          FT_Render_Mode    mode,                          const FT_Vector*  origin )  {    FT_Error  error;    error = ft_smooth_render_generic( render, slot, mode, origin,                                      FT_RENDER_MODE_LCD_V,                                      0, 3 );    if ( !error )      slot->bitmap.pixel_mode = FT_PIXEL_MODE_LCD_V;    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,    (FT_Renderer_RenderFunc)   ft_smooth_render,    (FT_Renderer_TransformFunc)ft_smooth_transform,    (FT_Renderer_GetCBoxFunc)  ft_smooth_get_cbox,    (FT_Renderer_SetModeFunc)  ft_smooth_set_mode,    (FT_Raster_Funcs*)    &ft_grays_raster  };  FT_CALLBACK_TABLE_DEF  const FT_Renderer_Class  ft_smooth_lcd_renderer_class =  {    {      FT_MODULE_RENDERER,      sizeof( FT_RendererRec ),      "smooth-lcd",      0x10000L,      0x20000L,      0,    /* module specific interface */      (FT_Module_Constructor)ft_smooth_init,      (FT_Module_Destructor) 0,      (FT_Module_Requester)  0    },    FT_GLYPH_FORMAT_OUTLINE,    (FT_Renderer_RenderFunc)   ft_smooth_render_lcd,    (FT_Renderer_TransformFunc)ft_smooth_transform,    (FT_Renderer_GetCBoxFunc)  ft_smooth_get_cbox,    (FT_Renderer_SetModeFunc)  ft_smooth_set_mode,    (FT_Raster_Funcs*)    &ft_grays_raster  };  FT_CALLBACK_TABLE_DEF  const FT_Renderer_Class  ft_smooth_lcdv_renderer_class =  {    {      FT_MODULE_RENDERER,      sizeof( FT_RendererRec ),      "smooth-lcdv",      0x10000L,      0x20000L,      0,    /* module specific interface */      (FT_Module_Constructor)ft_smooth_init,      (FT_Module_Destructor) 0,      (FT_Module_Requester)  0    },    FT_GLYPH_FORMAT_OUTLINE,    (FT_Renderer_RenderFunc)   ft_smooth_render_lcd_v,    (FT_Renderer_TransformFunc)ft_smooth_transform,    (FT_Renderer_GetCBoxFunc)  ft_smooth_get_cbox,    (FT_Renderer_SetModeFunc)  ft_smooth_set_mode,    (FT_Raster_Funcs*)    &ft_grays_raster  };/* END */