misc/libfreetype/src/raster/ftrend1.c
author koda
Tue, 16 Jul 2013 11:14:27 +0200
changeset 9357 a501f5ec7b34
parent 5172 88f2e05288ba
permissions -rw-r--r--
fromAscii is deprecated in qt5
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/***************************************************************************/
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/*                                                                         */
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/*  ftrend1.c                                                              */
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/*                                                                         */
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/*    The FreeType glyph rasterizer interface (body).                      */
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/*                                                                         */
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/*  Copyright 1996-2001, 2002, 2003, 2005, 2006 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 <ft2build.h>
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#include FT_INTERNAL_OBJECTS_H
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#include FT_OUTLINE_H
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#include "ftrend1.h"
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#include "ftraster.h"
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#include "rastpic.h"
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#include "rasterrs.h"
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  /* initialize renderer -- init its raster */
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  static FT_Error
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  ft_raster1_init( FT_Renderer  render )
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  {
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    FT_Library  library = FT_MODULE_LIBRARY( render );
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    render->clazz->raster_class->raster_reset( render->raster,
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                                               library->raster_pool,
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                                               library->raster_pool_size );
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    return Raster_Err_Ok;
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  }
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  /* set render-specific mode */
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  static FT_Error
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  ft_raster1_set_mode( FT_Renderer  render,
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                       FT_ULong     mode_tag,
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                       FT_Pointer   data )
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  {
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    /* we simply pass it to the raster */
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    return render->clazz->raster_class->raster_set_mode( render->raster,
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                                                         mode_tag,
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                                                         data );
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  }
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  /* transform a given glyph image */
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  static FT_Error
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  ft_raster1_transform( FT_Renderer       render,
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                        FT_GlyphSlot      slot,
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                        const FT_Matrix*  matrix,
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                        const FT_Vector*  delta )
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  {
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    FT_Error error = Raster_Err_Ok;
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    if ( slot->format != render->glyph_format )
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    {
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      error = Raster_Err_Invalid_Argument;
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      goto Exit;
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    }
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    if ( matrix )
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      FT_Outline_Transform( &slot->outline, matrix );
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    if ( delta )
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      FT_Outline_Translate( &slot->outline, delta->x, delta->y );
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  Exit:
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    return error;
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  }
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  /* return the glyph's control box */
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  static void
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  ft_raster1_get_cbox( FT_Renderer   render,
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                       FT_GlyphSlot  slot,
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                       FT_BBox*      cbox )
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  {
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    FT_MEM_ZERO( cbox, sizeof ( *cbox ) );
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    if ( slot->format == render->glyph_format )
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      FT_Outline_Get_CBox( &slot->outline, cbox );
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  }
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  /* convert a slot's glyph image into a bitmap */
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  static FT_Error
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  ft_raster1_render( FT_Renderer       render,
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                     FT_GlyphSlot      slot,
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                     FT_Render_Mode    mode,
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                     const FT_Vector*  origin )
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  {
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    FT_Error     error;
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    FT_Outline*  outline;
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    FT_BBox      cbox;
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    FT_UInt      width, height, pitch;
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    FT_Bitmap*   bitmap;
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    FT_Memory    memory;
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    FT_Raster_Params  params;
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    /* check glyph image format */
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    if ( slot->format != render->glyph_format )
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    {
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      error = Raster_Err_Invalid_Argument;
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      goto Exit;
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    }
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    /* check rendering mode */
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#ifndef FT_CONFIG_OPTION_PIC
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    if ( mode != FT_RENDER_MODE_MONO )
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    {
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      /* raster1 is only capable of producing monochrome bitmaps */
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      if ( render->clazz == &ft_raster1_renderer_class )
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        return Raster_Err_Cannot_Render_Glyph;
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    }
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    else
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    {
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      /* raster5 is only capable of producing 5-gray-levels bitmaps */
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      if ( render->clazz == &ft_raster5_renderer_class )
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        return Raster_Err_Cannot_Render_Glyph;
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    }
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#else /* FT_CONFIG_OPTION_PIC */
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    /* When PIC is enabled, we cannot get to the class object      */
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    /* so instead we check the final character in the class name   */
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    /* ("raster5" or "raster1"). Yes this is a hack.               */
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    /* The "correct" thing to do is have different render function */
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    /* for each of the classes.                                    */
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    if ( mode != FT_RENDER_MODE_MONO )
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    {
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      /* raster1 is only capable of producing monochrome bitmaps */
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      if ( render->clazz->root.module_name[6] == '1' )
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        return Raster_Err_Cannot_Render_Glyph;
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    }
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    else
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    {
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      /* raster5 is only capable of producing 5-gray-levels bitmaps */
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      if ( render->clazz->root.module_name[6] == '5' )
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        return Raster_Err_Cannot_Render_Glyph;
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    }
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#endif /* FT_CONFIG_OPTION_PIC */
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    outline = &slot->outline;
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    /* translate the outline to the new origin if needed */
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    if ( origin )
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      FT_Outline_Translate( outline, origin->x, origin->y );
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   160
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    /* compute the control box, and grid fit it */
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    FT_Outline_Get_CBox( outline, &cbox );
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   163
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    /* undocumented but confirmed: bbox values get rounded */
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   165
#if 1
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    cbox.xMin = FT_PIX_ROUND( cbox.xMin );
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    cbox.yMin = FT_PIX_ROUND( cbox.yMin );
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    cbox.xMax = FT_PIX_ROUND( cbox.xMax );
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    cbox.yMax = FT_PIX_ROUND( cbox.yMax );
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#else
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    cbox.xMin = FT_PIX_FLOOR( cbox.xMin );
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    cbox.yMin = FT_PIX_FLOOR( cbox.yMin );
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    cbox.xMax = FT_PIX_CEIL( cbox.xMax );
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    cbox.yMax = FT_PIX_CEIL( cbox.yMax );
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#endif
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   176
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    width  = (FT_UInt)( ( cbox.xMax - cbox.xMin ) >> 6 );
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    height = (FT_UInt)( ( cbox.yMax - cbox.yMin ) >> 6 );
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    bitmap = &slot->bitmap;
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    memory = render->root.memory;
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   181
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    /* release old bitmap buffer */
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    if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP )
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   184
    {
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      FT_FREE( bitmap->buffer );
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      slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP;
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   187
    }
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   188
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   189
    /* allocate new one, depends on pixel format */
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   190
    if ( !( mode & FT_RENDER_MODE_MONO ) )
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   191
    {
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      /* we pad to 32 bits, only for backwards compatibility with FT 1.x */
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      pitch              = FT_PAD_CEIL( width, 4 );
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      bitmap->pixel_mode = FT_PIXEL_MODE_GRAY;
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      bitmap->num_grays  = 256;
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   196
    }
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    else
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   198
    {
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      pitch              = ( ( width + 15 ) >> 4 ) << 1;
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      bitmap->pixel_mode = FT_PIXEL_MODE_MONO;
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   201
    }
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   202
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    bitmap->width = width;
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    bitmap->rows  = height;
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    bitmap->pitch = pitch;
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   206
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    if ( FT_ALLOC_MULT( bitmap->buffer, pitch, height ) )
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   208
      goto Exit;
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   209
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    slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
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   211
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    /* translate outline to render it into the bitmap */
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    FT_Outline_Translate( outline, -cbox.xMin, -cbox.yMin );
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   214
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    /* set up parameters */
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   216
    params.target = bitmap;
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    params.source = outline;
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    params.flags  = 0;
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koda
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   219
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   220
    if ( bitmap->pixel_mode == FT_PIXEL_MODE_GRAY )
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koda
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   221
      params.flags |= FT_RASTER_FLAG_AA;
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   222
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    /* render outline into the bitmap */
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   224
    error = render->raster_render( render->raster, &params );
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   225
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   226
    FT_Outline_Translate( outline, cbox.xMin, cbox.yMin );
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koda
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   227
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koda
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   228
    if ( error )
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   229
      goto Exit;
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   230
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koda
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   231
    slot->format      = FT_GLYPH_FORMAT_BITMAP;
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   232
    slot->bitmap_left = (FT_Int)( cbox.xMin >> 6 );
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   233
    slot->bitmap_top  = (FT_Int)( cbox.yMax >> 6 );
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koda
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diff changeset
   234
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   235
  Exit:
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   236
    return error;
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   237
  }
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   238
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   239
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   240
  FT_DEFINE_RENDERER(ft_raster1_renderer_class,
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   241
    
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   242
      FT_MODULE_RENDERER,
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koda
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   243
      sizeof( FT_RendererRec ),
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koda
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   244
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koda
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   245
      "raster1",
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koda
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   246
      0x10000L,
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koda
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   247
      0x20000L,
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koda
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   248
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koda
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   249
      0,    /* module specific interface */
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koda
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   250
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koda
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   251
      (FT_Module_Constructor)ft_raster1_init,
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koda
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   252
      (FT_Module_Destructor) 0,
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koda
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   253
      (FT_Module_Requester)  0
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koda
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   254
    ,
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koda
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   255
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koda
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   256
    FT_GLYPH_FORMAT_OUTLINE,
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koda
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   257
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koda
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   258
    (FT_Renderer_RenderFunc)   ft_raster1_render,
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koda
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   259
    (FT_Renderer_TransformFunc)ft_raster1_transform,
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   260
    (FT_Renderer_GetCBoxFunc)  ft_raster1_get_cbox,
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koda
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   261
    (FT_Renderer_SetModeFunc)  ft_raster1_set_mode,
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koda
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   262
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koda
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   263
    (FT_Raster_Funcs*)    &FT_STANDARD_RASTER_GET
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koda
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   264
  )
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koda
parents:
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   265
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koda
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   266
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koda
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   267
  /* This renderer is _NOT_ part of the default modules; you will need */
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koda
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   268
  /* to register it by hand in your application.  It should only be    */
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koda
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   269
  /* used for backwards-compatibility with FT 1.x anyway.              */
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koda
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   270
  /*                                                                   */
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koda
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   271
  FT_DEFINE_RENDERER(ft_raster5_renderer_class,
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koda
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   272
  
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koda
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   273
    
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koda
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   274
      FT_MODULE_RENDERER,
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koda
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   275
      sizeof( FT_RendererRec ),
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koda
parents:
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   276
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koda
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   277
      "raster5",
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koda
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   278
      0x10000L,
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koda
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   279
      0x20000L,
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koda
parents:
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   280
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koda
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   281
      0,    /* module specific interface */
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koda
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   282
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koda
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   283
      (FT_Module_Constructor)ft_raster1_init,
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koda
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   284
      (FT_Module_Destructor) 0,
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koda
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   285
      (FT_Module_Requester)  0
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koda
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   286
    ,
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koda
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   287
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koda
parents:
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   288
    FT_GLYPH_FORMAT_OUTLINE,
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koda
parents:
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   289
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koda
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   290
    (FT_Renderer_RenderFunc)   ft_raster1_render,
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koda
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   291
    (FT_Renderer_TransformFunc)ft_raster1_transform,
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koda
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   292
    (FT_Renderer_GetCBoxFunc)  ft_raster1_get_cbox,
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koda
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   293
    (FT_Renderer_SetModeFunc)  ft_raster1_set_mode,
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koda
parents:
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   294
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koda
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   295
    (FT_Raster_Funcs*)    &FT_STANDARD_RASTER_GET
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koda
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   296
  )
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koda
parents:
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   297
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koda
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   298
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koda
parents:
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   299
/* END */