ftsmooth.c

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Hash : 68e9f927
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Date : 2002-09-27T11:09:23

* src/sfnt/ttpost.c (load_post_names, tt_face_free_ps_names, tt_face_get_ps_name): Replace switch statement with if clauses to make it more portable. * src/cff/cffobjs.c (cff_face_init): Ditto. * include/freetype/ftmodule.h (FT_Module_Class): Use `FT_Long' for `module_size'. * include/freetype/ftrender.h (FT_Glyph_Class_): Use `FT_Long' for `glyph_size'. * src/base/ftobjs.c (FT_Render_Glyph): Change second parameter to `FT_Render_Mode'. (FT_Render_Glyph_Internal): Change third parameter to `FT_Render_Mode'. * src/base/ftglyph.c (FT_Glyph_To_Bitmap): Change second parameter to `FT_Render_Mode'. * src/raster/ftrend1.c (ft_raster1_render): Change third parameter to `FT_Render_Mode'. * src/smooth/ftsmooth.c (ft_smooth_render, ft_smooth_render_lcd, ft_smooth_render_lcd_v): Ditto. (ft_smooth_render_generic): Change third and fifth parameter to `FT_Render_Mode'. * include/freetype/freetype.h, include/freetype/internal/ftobjs.h, include/freetype/ftglyph.h: Updated. * src/cff/cffdrivr.c (Load_Glyph), src/pcf/pcfdriver.c (PCF_Glyph_Load), src/pfr/pfrobjs.c (pfr_slot_load), src/winfonts/winfnt.c (FNT_Load_Glyph), src/t42/t42objs.c (T42_GlyphSlot_Load), src/bdf/bdfdrivr.c (BDF_Glyph_Load): Change fourth parameter to `FT_Int32'. * src/pfr/pfrobjs.c (pfr_face_init): Add two missing parameters and declare them as unused. * src/cid/cidparse.h (CID_Parser): Use FT_Long for `postscript_len'. * src/psnames/psnames.h (PS_Unicode_Value_Func): Change return value to FT_UInt32. * src/psnames/psmodule.c (ps_unicode_value, ps_build_unicode_table): Updated accordingly. * src/cff/cffdrivr.c (Get_Kerning): Use FT_Long for `middle'. (cff_get_glyph_name): Use cast for result of ft_strlen. * src/cff/cffparse.c (cff_parse_real): User cast for assigning `exp'. * src/cff/cffload.c (cff_index_get_pointers): Use FT_ULong for some local variables. (cff_charset_load, cff_encoding_load): Use casts to FT_UInt for some switch statements. (cff_font_load): Use cast in call to CFF_Load_FD_Select. * src/cff/cffobjs.c (cff_size_init): Use more casts. (cff_face_init): Use FT_Int32 for `flags'. * src/cff/cffgload.c (cff_operator_seac): Use cast for assigning `adx' and `ady'. (cff_decoder_parse_charstrings): Use FT_ULong for third parameter. Use more casts. * src/cff/cffcmap.c (cff_cmap_unicode_init): Use cast for `count'. * src/cid/cidload.c (cid_read_subrs): Use FT_ULong for `len'. * src/cid/cidgload.c (cid_load_glyph): Add missing cast for `cid_get_offset'. * src/psaux/t1decode.c (t1_decoder_parse_charstrings) <18>: Use cast for `num_points'. (t1_decoder_init): Use cast for assigning `decoder->num_glyphs'. * src/base/ftdebug.c (ft_debug_init): Use FT_Int. * include/freetype/internal/ftdriver.h (FT_Slot_LoadFunc): Use `FT_Int32' for fourth parameter. * src/base/ftobjs.c (open_face): Use cast for calling clazz->init_face. * src/raster/ftraster.c (Set_High_Precision): Use `1' instead of `1L'. (Finalize_Profile_Table, Line_Up, ft_black_init): Use casts. * src/raster/ftrend1.c (ft_raster1_render): Ditto. * src/sfnt/sfnt_dir_check: Compare `magic' with unsigned long constant. * builds/amiga/include/freetype/config/ftmodule.h: Updated.

src/smooth/ftsmooth.c

/***************************************************************************/
/*                                                                         */
/*  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_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,
                            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 &= -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;
    if ( hmul )
    {
      width = width * hmul;
      pitch = ( width + 3 ) & -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->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 = cbox.xMin >> 6;
    slot->bitmap_top  = 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,
                    FT_Vector*      origin )
  {
    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,
                        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,
                          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 */

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src/smooth/ftsmooth.c