fttimer.c

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Hash : f0df85ba
Author :
Date : 2000-06-22T00:17:42

  - MAJOR INTERNAL REDESIGN:

    A lot of internal modifications have been performed lately on the
    source in order to provide the following enhancements:

      - more generic module support:

        The FT_Module type is now defined to represent a handle to a given
        module. The file <freetype/ftmodule.h> contains the FT_Module_Class
        definition, as well as the module-loading public API

        The FT_Driver type is still defined, and still represents a pointer
        to a font driver. Note that FT_Add_Driver is replaced by FT_Add_Module,
        FT_Get_Driver by FT_Get_Module, etc..


      - support for generic glyph image types:

        The FT_Renderer type is a pointer to a module used to perform various
        operations on glyph image.

        Each renderer is capable of handling images in a single format
        (e.g. ft_glyph_format_outline). Its functions are used to:

           - transform an glyph image
           - render a glyph image into a bitmap
           - return the control box (dimensions) of a given glyph image


        The scan converters "ftraster.c" and "ftgrays.c" have been moved
        to the new directory "src/renderer", and are used to provide two
        default renderer modules.

        One corresponds to the "standard" scan-converter, the other to the
        "smooth" one.

        The current renderer can be set through the new function
        FT_Set_Renderer.

        The old raster-related function FT_Set_Raster, FT_Get_Raster and
        FT_Set_Raster_Mode have now disappeared, in favor of the new:

           FT_Get_Renderer
           FT_Set_Renderer

        see the file <freetype/ftrender.h> for more details..

        These changes were necessary to properly support different scalable
        formats in the future, like bi-color glyphs, etc..


      - glyph loader object:

        A new internal object, called a 'glyph loader' has been introduced
        in the base layer. It is used by all scalable format font drivers
        to load glyphs and composites.

        This object has been created to reduce the code size of each driver,
        as each one of them basically re-implemented its functionality.

        See <freetype/internal/ftobjs.h> and the FT_GlyphLoader type for
        more information..



      - FT_GlyphSlot had new fields:

        In order to support extended features (see below), the FT_GlyphSlot
        structure has a few new fields:

           linearHoriAdvance:  this field gives the linearly scaled (i.e.
                               scaled but unhinted) advance width for the glyph,
                               expressed as a 16.16 fixed pixel value. This
                               is useful to perform WYSIWYG text.

           linearVertAdvance:  this field gives the linearly scaled advance
                               height for the glyph (relevant in vertical glyph
                               layouts only). This is useful to perform
                               WYSIWYG text.

        Note that the two above field replace the removed "metrics2" field
        in the glyph slot.

           advance:   this field is a vector that gives the transformed
                      advance for the glyph. By default, it corresponds
                      to the advance width, unless FT_LOAD_VERTICAL_LAYOUT
                      was specified when calling FT_Load_Glyph or FT_Load_Char

           bitmap_left: this field gives the distance in integer pixels from
                        the current pen position to the left-most pixel of
                        a glyph image WHEN IT IS A BITMAP. It is only valid
                        when the "format" field is set to
                        "ft_glyph_format_bitmap", for example, after calling
                        the new function FT_Render_Glyph.

           bitmap_top:  this field gives the distance in integer pixels from
                        the current pen position (located on the baseline) to
                        the top-most pixel of the glyph image WHEN IT IS A
                        BITMAP. Positive values correspond to upwards Y.

           loader:  this is a new private field for the glyph slot. Client
                    applications should not touch it..


      - support for transforms and direct rendering in FT_Load_Glyph:

        Most of the functionality found in <freetype/ftglyph.h> has been
        moved to the core library. Hence, the following:

          - a transform can be specified for a face through FT_Set_Transform.
            this transform is applied by FT_Load_Glyph to scalable glyph images
            (i.e. NOT TO BITMAPS) before the function returns, unless the
            bit flag FT_LOAD_IGNORE_TRANSFORM was set in the load flags..


          - once a glyph image has been loaded, it can be directly converted to
            a bitmap by using the new FT_Render_Glyph function. Note that this
            function takes the glyph image from the glyph slot, and converts
            it to a bitmap whose properties are returned in "face.glyph.bitmap",
            "face.glyph.bitmap_left" and "face.glyph.bitmap_top". The original
            native image might be lost after the conversion.


          - when using the new bit flag FT_LOAD_RENDER, the FT_Load_Glyph
            and FT_Load_Char functions will call FT_Render_Glyph automatically
            when needed.

Download

demos/src/fttimer.c

/****************************************************************************/
/*                                                                          */
/*  The FreeType project - a Free and Portable Quality TrueType Renderer.   */
/*                                                                          */
/*  Copyright 1996-1998 by                                                  */
/*  D. Turner, R.Wilhelm, and W. Lemberg                                    */
/*                                                                          */
/*  fttimer: A simple performance benchmark.  Now with graylevel rendering  */
/*           with the '-g' option.                                          */
/*                                                                          */
/*           Be aware that the timer program benchmarks different things    */
/*           in each release of the FreeType library.  Thus, performance    */
/*           should only be compared between similar release numbers.       */
/*                                                                          */
/*                                                                          */
/*  NOTE: This is just a test program that is used to show off and          */
/*        debug the current engine.  In no way does it shows the final      */
/*        high-level interface that client applications will use.           */
/*                                                                          */
/****************************************************************************/

#include <freetype/freetype.h>
#include <freetype/ftrender.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>    /* for clock() */

#include "graph.h"
#include <freetype/ftgrays.h>

/* SunOS 4.1.* does not define CLOCKS_PER_SEC, so include <sys/param.h> */
/* to get the HZ macro which is the equivalent.                         */
#if defined(__sun__) && !defined(SVR4) && !defined(__SVR4)
#include <sys/param.h>
#define CLOCKS_PER_SEC HZ
#endif

#define CHARSIZE    400   /* character point size */
#define MAX_GLYPHS  512   /* Maximum number of glyphs rendered at one time */

  char  Header[128];

  FT_Error      error;
  FT_Library    library;

  FT_Face       face;
  FT_Size       size;
  FT_GlyphSlot  glyph;

  FT_Outline    outline;

  FT_Pos*   cur_x;
  FT_Pos*   cur_y;

  unsigned short*  cur_endContour;
  unsigned char*   cur_touch;

  FT_Outline  outlines[MAX_GLYPHS];

  int             num_glyphs;
  int             tab_glyphs;
  int             cur_glyph;
  int             cur_point;
  unsigned short  cur_contour;

  int             pixel_size   = CHARSIZE;
  int             repeat_count = 1;
  int             use_grays    = 0;

  FT_Bitmap      Bit;
  grBitmap       bit;

  int  Fail;
  int  Num;

  int  vio_Height, vio_Width;

  short  visual;      /* display glyphs while rendering */
  short  antialias; /* smooth fonts with gray levels  */
  short  force_low;


#define RASTER_BUFF_SIZE   128000
  char     raster_buff[ RASTER_BUFF_SIZE ];


  static void Clear_Buffer();

  static void Panic( const char* message )
  {
    fprintf( stderr, "%s\n  error code = 0x%04x\n", message, error );
  }

/*******************************************************************/
/*                                                                 */
/*  Get_Time:                                                      */
/*                                                                 */
/*    Returns the current time in milliseconds.                    */
/*                                                                 */
/*******************************************************************/

  long  Get_Time( void )
  {
    return clock() * 10000 / CLOCKS_PER_SEC;
  }


/*******************************************************************/
/*                                                                 */
/*  Init_Engine:                                                   */
/*                                                                 */
/*    Allocates bitmap, render pool and other structs...           */
/*                                                                 */
/*******************************************************************/

  void  Init_Engine( void )
  {
    Bit.rows       = bit.rows;
    Bit.width      = bit.width;
    Bit.pitch      = bit.pitch;
    Bit.buffer     = bit.buffer;
    Bit.pixel_mode = antialias ? ft_pixel_mode_grays : ft_pixel_mode_mono;
    Bit.num_grays  = bit.grays;
    Clear_Buffer();
  }


/*******************************************************************/
/*                                                                 */
/*  Clear_Buffer:                                                  */
/*                                                                 */
/*    Clears current bitmap.                                       */
/*                                                                 */
/*******************************************************************/

  static void  Clear_Buffer( void )
  {
    long size = Bit.rows * Bit.pitch;

    memset( Bit.buffer, 0, size );
  }


/*******************************************************************/
/*                                                                 */
/*  LoadTrueTypeChar:                                              */
/*                                                                 */
/*    Loads a glyph into memory.                                   */
/*                                                                 */
/*******************************************************************/

  FT_Error  LoadChar( int  idx )
  {
    error = FT_Load_Glyph( face, idx, FT_LOAD_DEFAULT );
    if ( error )
      return error;

    glyph->outline.flags |= ft_outline_single_pass |
                                    ft_outline_ignore_dropouts;

    if (force_low)
      glyph->outline.flags &= ~ft_outline_high_precision;

    /* debugging */
#if 0
    if ( idx == 0 && !visual )
    {
      printf( "points = %d\n", outline.points );
      for ( j = 0; j < outline.points; j++ )
        printf( "%02x  (%01hx,%01hx)\n",
                 j, outline.xCoord[j], outline.yCoord[j] );
      printf( "\n" );
    }
#endif

    /* create a new outline */
    FT_Outline_New( library,
                    glyph->outline.n_points,
                    glyph->outline.n_contours,
                    &outlines[cur_glyph] );

    /* copy the glyph outline into it */
    glyph->outline.flags |= ft_outline_single_pass;
    if (force_low)
      glyph->outline.flags &= ~ft_outline_high_precision;

    FT_Outline_Copy( &glyph->outline, &outlines[cur_glyph] );

    /* center outline around 0 */
    {
      FT_BBox  bbox;

      FT_Outline_Get_CBox( &glyph->outline, &bbox );
      FT_Outline_Translate( &outlines[cur_glyph],
                            - ( bbox.xMax - bbox.xMin )/2,
                            - ( bbox.yMax - bbox.yMin )/2 );
    }
    /* translate it */
    FT_Outline_Translate( &outlines[cur_glyph],
                          Bit.width * 32 ,
                          Bit.rows  * 32 );
    cur_glyph++;

    return FT_Err_Ok;
  }


/*******************************************************************/
/*                                                                 */
/*  ConvertRaster:                                                 */
/*                                                                 */
/*    Performs scan conversion.                                    */
/*                                                                 */
/*******************************************************************/

  FT_Error  ConvertRaster( int  index )
  {
    outlines[index].flags |= ~ft_outline_single_pass;
    return FT_Outline_Get_Bitmap( library, &outlines[index], &Bit );
  }


  static void Usage()
  {
      fprintf( stderr, "fttimer: simple performance timer -- part of the FreeType project\n" );
      fprintf( stderr, "-----------------------------------------------------------------\n\n" );
      fprintf( stderr, "Usage: fttimer [options] fontname[.ttf|.ttc]\n\n" );
      fprintf( stderr, "options:\n");
      fprintf( stderr, "   -r : repeat count to be used (default is 1)\n" );
      fprintf( stderr, "   -s : character pixel size (default is 600)\n" );
      fprintf( stderr, "   -v : display results..\n" );
      fprintf( stderr, "   -g : render anti-aliased glyphs\n" );
      fprintf( stderr, "   -a : use smooth anti-aliaser\n" );
      fprintf( stderr, "   -l : force low quality even at small sizes\n" );
      exit(1);
  }


  int  main( int  argc, char**  argv )
  {
    int    i, total, base, rendered_glyphs;
    char   filename[128 + 4];
    char   alt_filename[128 + 4];
    char*  execname;
    grSurface*  surface = 0;

    long   t, t0, tz0;


    execname    = argv[0];

    antialias = 0;
    visual      = 0;
    force_low   = 0;

    while ( argc > 1 && argv[1][0] == '-' )
    {
      switch ( argv[1][1] )
      {
      case 'g':
        antialias = 1;
        break;

      case 'a':
        use_grays = 1;
        break;

      case 'l':
        force_low = 1;
        break;

      case 'v':
        visual = 1;
        break;

      case 's':
        argc--;
        argv++;
        if ( argc < 2 ||
            sscanf( argv[1], "%d", &pixel_size ) != 1 )
          Usage();
        break;

      case 'r':
        argc--;
        argv++;
        if ( argc < 2 ||
             sscanf( argv[1], "%d", &repeat_count ) != 1 )
          Usage();
        if (repeat_count < 1)
          repeat_count = 1;
        break;

      default:
        fprintf( stderr, "Unknown argument '%s'!\n", argv[1] );
		Usage();
      }
      argc--;
      argv++;
    }

    if ( argc != 2 )
	  Usage();

    i = strlen( argv[1] );
    while ( i > 0 && argv[1][i] != '\\' )
    {
      if ( argv[1][i] == '.' )
        i = 0;
      i--;
    }

    filename[128] = '\0';
    alt_filename[128] = '\0';

    strncpy( filename, argv[1], 128 );
    strncpy( alt_filename, argv[1], 128 );

    if ( i >= 0 )
    {
      strncpy( filename + strlen( filename ), ".ttf", 4 );
      strncpy( alt_filename + strlen( alt_filename ), ".ttc", 4 );
    }

    /* Initialize engine */

    if ( (error = FT_Init_FreeType( &library )) )
      Panic( "Error while initializing engine" );

    /* set-up smooth anti-aliaser */
    if (use_grays)
    {
      FT_Renderer  smooth;
      
      smooth = (FT_Renderer)FT_Get_Module( library, "smooth renderer" );
      if (!smooth) Panic( "Could not initialize smooth anti-aliasing renderer" );
      
      FT_Set_Renderer( library, smooth, 0, 0 );
    }

    /* Load face */

    error = FT_New_Face( library, filename, 0, &face );
    if ( error == FT_Err_Cannot_Open_Stream )
      Panic( "Could not find/open font resource" );
    else if ( error )
      Panic( "Error while opening font resource" );

    /* get face properties and allocate preload arrays */

    num_glyphs = face->num_glyphs;
    glyph      = face->glyph;

    tab_glyphs = MAX_GLYPHS;
    if ( tab_glyphs > num_glyphs )
      tab_glyphs = num_glyphs;

    /* create size */

    error = FT_Set_Pixel_Sizes( face, pixel_size, pixel_size );
    if ( error ) Panic( "Could not reset instance" );

    bit.mode  = antialias ? gr_pixel_mode_gray : gr_pixel_mode_mono;
    bit.width = 640;
    bit.rows  = 480;
    bit.grays = 128;

    if ( visual )
    {
      if ( !grInitDevices() )
        Panic( "Could not initialize graphics.\n" );

      surface = grNewSurface( 0, &bit );
      if (!surface)
        Panic( "Could not open graphics window/screen.\n" );
    }
    else
    {
      if ( grNewBitmap( bit.mode,
                        bit.grays,
                        bit.width,
                        bit.rows,
                       &bit ) )
        Panic( "Could not create rendering buffer.\n" );
    }

    Init_Engine();

    Num  = 0;
    Fail = 0;

    total = num_glyphs;
    base  = 0;

    rendered_glyphs = 0;

    t0 = 0;  /* Initial time */

    tz0 = Get_Time();

    while ( total > 0 )
    {
      int  repeat;

      /* First, preload 'tab_glyphs' in memory */
      cur_glyph   = 0;
      cur_point   = 0;
      cur_contour = 0;

      printf( "loading %d glyphs", tab_glyphs );

      for ( Num = 0; Num < tab_glyphs; Num++ )
      {
        error = LoadChar( base + Num );
        if ( error )
          Fail++;

        total--;
      }

      base += tab_glyphs;

      if ( tab_glyphs > total )
        tab_glyphs = total;

      printf( ", rendering... " );

      /* Now, render the loaded glyphs */

      t = Get_Time();

      for ( repeat = 0; repeat < repeat_count; repeat++ )
      {
        for ( Num = 0; Num < cur_glyph; Num++ )
        {
          if ( (error = ConvertRaster( Num )) )
            Fail++;

          else
  	  {
            rendered_glyphs ++;

            if ( Num == 0 && visual )
            {
              sprintf( Header, "Glyph: %5d", Num );
              grSetTitle( surface, Header );
              grRefreshSurface( surface );
              Clear_Buffer();
            }
	  }
        }
      }

      t = Get_Time() - t;
      if ( t < 0 )
        t += 1000 * 60 * 60;

      printf( " = %f s\n", (double)t / 10000 );
      t0 += t;

      /* Now free all loaded outlines */
      for ( Num = 0; Num < cur_glyph; Num++ )
        FT_Outline_Done( library, &outlines[Num] );
    }

    tz0 = Get_Time() - tz0;

    FT_Done_Face( face );

    printf( "\n" );
    printf( "rendered glyphs  = %d\n", rendered_glyphs );
    printf( "render time      = %f s\n", (double)t0 / 10000 );
    printf( "fails            = %d\n", Fail );
    printf( "average glyphs/s = %f\n",
             (double)rendered_glyphs / t0 * 10000 );

    printf( "total timing     = %f s\n", (double)tz0 / 10000 );
    printf( "Fails = %d\n", Fail );

    FT_Done_FreeType( library );

    exit( 0 );      /* for safety reasons */

    return 0;       /* never reached */
  }


/* End */

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kc3-lang/freetype/demos/src/fttimer.c

Commit

demos/src/fttimer.c