gview.c

source code: Covert TXT to PDF

#include <nirvana.h>
#include NV_VIEWPORT_H
#include <stdio.h>

#include <ft2build.h>
#include FT_FREETYPE_H

/* include FreeType internals to debug hints */
#include <../src/pshinter/pshrec.h>
#include <../src/pshinter/pshalgo1.h>
#include <../src/pshinter/pshalgo2.h>

#include <../src/autohint/ahtypes.h>

 /************************************************************************/
 /************************************************************************/
 /*****                                                              *****/
 /*****                     ROOT DEFINITIONS                         *****/
 /*****                                                              *****/
 /************************************************************************/
 /************************************************************************/


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

/* 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

static int  first_glyph = 0;

static NV_Renderer   renderer;
static NV_Painter    painter;
static NV_Pixmap     target;
static NV_Error      error;
static NV_Memory     memory;
static NVV_Display   display;
static NVV_Surface   surface;

static FT_Library    freetype;
static FT_Face       face;


static  NV_Pos        glyph_scale;
static  NV_Pos        glyph_org_x;
static  NV_Pos        glyph_org_y;
static  NV_Transform  glyph_transform;  /* font units -> device pixels */
static  NV_Transform  size_transform;   /* subpixels  -> device pixels */

static  NV_Scale      grid_scale = 1.0;

static  int   glyph_index;
static  int   pixel_size = 12;

 /************************************************************************/
 /************************************************************************/
 /*****                                                              *****/
 /*****                 OPTIONS, COLORS and OTHERS                   *****/
 /*****                                                              *****/
 /************************************************************************/
 /************************************************************************/

static  int   option_show_axis     = 1;
static  int   option_show_dots     = 1;
static  int   option_show_stroke   = 0;
static  int   option_show_glyph    = 1;
static  int   option_show_grid     = 1;
static  int   option_show_em       = 0;
static  int   option_show_smooth   = 1;
static  int   option_show_blues    = 0;
static  int   option_show_edges    = 0;
static  int   option_show_segments = 1;
static  int   option_show_links    = 1;
static  int   option_show_indices  = 0;

static  int   option_show_ps_hints   = 1;
static  int   option_show_horz_hints = 1;
static  int   option_show_vert_hints = 1;


static  int   option_hinting = 1;

static  char  temp_message[1024];

static  NV_Path   symbol_dot     = NULL;
static  NV_Path   symbol_circle  = NULL;
static  NV_Path   symbol_square  = NULL;
static  NV_Path   symbol_rect_h  = NULL;
static  NV_Path   symbol_rect_v  = NULL;



#define  AXIS_COLOR        0xFFFF0000
#define  GRID_COLOR        0xFFD0D0D0
#define  ON_COLOR          0xFFFF2000
#define  OFF_COLOR         0xFFFF0080
#define  STRONG_COLOR      0xFF404040
#define  INTERP_COLOR      0xFF206040
#define  SMOOTH_COLOR      0xF000B040
#define  BACKGROUND_COLOR  0xFFFFFFFF
#define  TEXT_COLOR        0xFF000000
#define  EM_COLOR          0x80008000
#define  BLUES_TOP_COLOR   0x4000008F
#define  BLUES_BOT_COLOR   0x40008F00

#define  GHOST_HINT_COLOR  0xE00000FF
#define  STEM_HINT_COLOR   0xE02020FF
#define  STEM_JOIN_COLOR   0xE020FF20

#define  EDGE_COLOR        0xF0704070
#define  SEGMENT_COLOR     0xF0206040
#define  LINK_COLOR        0xF0FFFF00
#define  SERIF_LINK_COLOR  0xF0FF808F

/* print message and abort program */
static void
Panic( const char*  message )
{
  fprintf( stderr, "PANIC: %s\n", message );
  exit(1);
}


static void
init_symbols( void )
{
  nv_path_new_rectangle( renderer, -1, -1, 3, 3, 0, 0, &symbol_square );
  nv_path_new_rectangle( renderer, -1, -6, 2, 12, 0, 0, &symbol_rect_v );
  nv_path_new_rectangle( renderer, -6, -1, 12, 2, 0, 0, &symbol_rect_h );
  nv_path_new_circle( renderer, 0, 0, 3., &symbol_dot );
  nv_path_stroke( symbol_dot, 0.6,
                  nv_path_linecap_butt,
                  nv_path_linejoin_miter, 1.,
                  &symbol_circle );

  nv_path_destroy( symbol_dot );
  nv_path_new_circle( renderer, 0, 0, 2., &symbol_dot );

 }

static void
done_symbols( void )
{
  nv_path_destroy( symbol_circle );
  nv_path_destroy( symbol_dot );
  nv_path_destroy( symbol_rect_v );
  nv_path_destroy( symbol_rect_h );
  nv_path_destroy( symbol_square );
}

 /************************************************************************/
 /************************************************************************/
 /*****                                                              *****/
 /*****                     COMMON GRID DRAWING ROUTINES             *****/
 /*****                                                              *****/
 /************************************************************************/
 /************************************************************************/

static void
reset_scale( NV_Scale  scale )
{
 /* compute font units -> grid pixels scale factor */
  glyph_scale = target->width*0.75 / face->units_per_EM * scale;

 /* setup font units -> grid pixels transform */
  nv_transform_set_scale( &glyph_transform, glyph_scale, -glyph_scale );
  glyph_org_x = glyph_transform.delta.x = target->width*0.125;
  glyph_org_y = glyph_transform.delta.y = target->height*0.875;

 /* setup subpixels -> grid pixels transform */
  nv_transform_set_scale( &size_transform,
                            glyph_scale/nv_fromfixed(face->size->metrics.x_scale),
                          - glyph_scale/nv_fromfixed(face->size->metrics.y_scale) );

  size_transform.delta = glyph_transform.delta;
}


static void
reset_size( int  pixel_size, NV_Scale  scale )
{
  FT_Set_Pixel_Sizes( face, pixel_size, pixel_size );
  reset_scale( scale );
}


static void
clear_background( void )
{
  nv_pixmap_fill_rect( target, 0, 0, target->width, target->height,
                       BACKGROUND_COLOR );
}


static void
draw_grid( void )
{
  int  x = (int)glyph_org_x;
  int  y = (int)glyph_org_y;

  /* draw grid */
  if ( option_show_grid )
  {
    NV_Scale  min, max, x, step;

    /* draw vertical grid bars */
    step = 64. * size_transform.matrix.xx;
    if (step > 1.)
    {
      min  = max = glyph_org_x;
      while ( min - step >= 0 )             min -= step;
      while ( max + step < target->width )  max += step;

      for ( x = min; x <= max; x += step )
        nv_pixmap_fill_rect( target, (NV_Int)(x+.5), 0,
                             1, target->height, GRID_COLOR );
    }

    /* draw horizontal grid bars */
    step = -64. * size_transform.matrix.yy;
    if (step > 1.)
    {
      min  = max = glyph_org_y;
      while ( min - step >= 0 )              min -= step;
      while ( max + step < target->height )  max += step;

      for ( x = min; x <= max; x += step )
        nv_pixmap_fill_rect( target, 0, (NV_Int)(x+.5),
                             target->width, 1, GRID_COLOR );
    }
  }

  /* draw axis */
  if ( option_show_axis )
  {
    nv_pixmap_fill_rect( target, x, 0, 1, target->height, AXIS_COLOR );
    nv_pixmap_fill_rect( target, 0, y, target->width, 1, AXIS_COLOR );
  }

  if ( option_show_em )
  {
    NV_Path  path;
    NV_Path  stroke;
    NV_UInt  units = (NV_UInt)face->units_per_EM;

    nv_path_new_rectangle( renderer, 0, 0, units, units, 0, 0, &path );
    nv_path_transform( path, &glyph_transform );

    nv_path_stroke( path, 1.5, nv_path_linecap_butt, nv_path_linejoin_miter,
                    4.0, &stroke );

    nv_painter_set_color( painter, EM_COLOR, 256 );
    nv_painter_fill_path( painter, NULL, 0, stroke );

    nv_path_destroy( stroke );
    nv_path_destroy( path );
  }

}


 /************************************************************************/
 /************************************************************************/
 /*****                                                              *****/
 /*****            POSTSCRIPT GLOBALS ROUTINES                       *****/
 /*****                                                              *****/
 /************************************************************************/
 /************************************************************************/

#include <../src/pshinter/pshglob.h>

static void
draw_ps_blue_zones( void )
{
  if ( option_show_blues && ps_debug_globals )
  {
    PSH_Blues       blues = &ps_debug_globals->blues;
    PSH_Blue_Table  table;
    NV_Vector       v;
    FT_Int          y1, y2;
    FT_UInt         count;
    PSH_Blue_Zone   zone;

    /* draw top zones */
    table = &blues->normal_top;
    count = table->count;
    zone  = table->zones;

    for ( ; count > 0; count--, zone++ )
    {
      v.x = 0;
      if ( !ps_debug_no_horz_hints )
      {
        v.y = zone->cur_ref + zone->cur_delta;
        nv_vector_transform( &v, &size_transform );
      }
      else
      {
        v.y = zone->org_ref + zone->org_delta;
        nv_vector_transform( &v, &glyph_transform );
      }
      y1  = (int)(v.y + 0.5);

      v.x = 0;
      if ( !ps_debug_no_horz_hints )
      {
        v.y = zone->cur_ref;
        nv_vector_transform( &v, &size_transform );
      }
      else
      {
        v.y = zone->org_ref;
        nv_vector_transform( &v, &glyph_transform );
      }
      y2 = (int)(v.y + 0.5);

      nv_pixmap_fill_rect( target, 0, y1,
                           target->width, y2-y1+1,
                           BLUES_TOP_COLOR );

#if 0
      printf( "top [%.3f %.3f]\n", zone->cur_bottom/64.0, zone->cur_top/64.0 );
#endif
    }


    /* draw bottom zones */
    table = &blues->normal_bottom;
    count = table->count;
    zone  = table->zones;

    for ( ; count > 0; count--, zone++ )
    {
      v.x = 0;
      v.y = zone->cur_ref;
      nv_vector_transform( &v, &size_transform );
      y1  = (int)(v.y + 0.5);

      v.x = 0;
      v.y = zone->cur_ref + zone->cur_delta;
      nv_vector_transform( &v, &size_transform );
      y2 = (int)(v.y + 0.5);

      nv_pixmap_fill_rect( target, 0, y1,
                           target->width, y2-y1+1,
                           BLUES_BOT_COLOR );

#if 0
      printf( "bot [%.3f %.3f]\n", zone->cur_bottom/64.0, zone->cur_top/64.0 );
#endif
    }
  }
}

 /************************************************************************/
 /************************************************************************/
 /*****                                                              *****/
 /*****            POSTSCRIPT HINTER ALGORITHM 1 ROUTINES            *****/
 /*****                                                              *****/
 /************************************************************************/
 /************************************************************************/

#include <../src/pshinter/pshalgo1.h>

static int pshint_cpos     = 0;
static int pshint_vertical = -1;

static void
draw_ps1_hint( PSH1_Hint   hint, FT_Bool  vertical )
{
  int        x1, x2;
  NV_Vector  v;


  if ( pshint_vertical != vertical )
  {
    if (vertical)
      pshint_cpos = 40;
    else
      pshint_cpos = 10;

    pshint_vertical = vertical;
  }

  if (vertical)
  {
    if ( !option_show_vert_hints )
      return;

    v.x = hint->cur_pos;
    v.y = 0;
    nv_vector_transform( &v, &size_transform );
    x1 = (int)(v.x + 0.5);

    v.x = hint->cur_pos + hint->cur_len;
    v.y = 0;
    nv_vector_transform( &v, &size_transform );
    x2 = (int)(v.x + 0.5);

    nv_pixmap_fill_rect( target, x1, 0, 1, target->height,
                         psh1_hint_is_ghost(hint)
                         ? GHOST_HINT_COLOR : STEM_HINT_COLOR );

    if ( psh1_hint_is_ghost(hint) )
    {
      x1 --;
      x2 = x1 + 2;
    }
    else
      nv_pixmap_fill_rect( target, x2, 0, 1, target->height,
                           psh1_hint_is_ghost(hint)
                           ? GHOST_HINT_COLOR : STEM_HINT_COLOR );

    nv_pixmap_fill_rect( target, x1, pshint_cpos, x2+1-x1, 1,
                         STEM_JOIN_COLOR );
  }
  else
  {
    if (!option_show_horz_hints)
      return;

    v.y = hint->cur_pos;
    v.x = 0;
    nv_vector_transform( &v, &size_transform );
    x1 = (int)(v.y + 0.5);

    v.y = hint->cur_pos + hint->cur_len;
    v.x = 0;
    nv_vector_transform( &v, &size_transform );
    x2 = (int)(v.y + 0.5);

    nv_pixmap_fill_rect( target, 0, x1, target->width, 1,
                         psh1_hint_is_ghost(hint)
                         ? GHOST_HINT_COLOR : STEM_HINT_COLOR );

    if ( psh1_hint_is_ghost(hint) )
    {
      x1 --;
      x2 = x1 + 2;
    }
    else
      nv_pixmap_fill_rect( target, 0, x2, target->width, 1,
                           psh1_hint_is_ghost(hint)
                           ? GHOST_HINT_COLOR : STEM_HINT_COLOR );

    nv_pixmap_fill_rect( target, pshint_cpos, x2, 1, x1+1-x2,
                         STEM_JOIN_COLOR );
  }

#if 0
  printf( "[%7.3f %7.3f] %c\n", hint->cur_pos/64.0, (hint->cur_pos+hint->cur_len)/64.0, vertical ? 'v' : 'h' );
#endif

  pshint_cpos += 10;
}



 /************************************************************************/
 /************************************************************************/
 /*****                                                              *****/
 /*****            POSTSCRIPT HINTER ALGORITHM 2 ROUTINES            *****/
 /*****                                                              *****/
 /************************************************************************/
 /************************************************************************/

#include <../src/pshinter/pshalgo2.h>

static void
draw_ps2_hint( PSH2_Hint   hint, FT_Bool  vertical )
{
  int        x1, x2;
  NV_Vector  v;

  if ( pshint_vertical != vertical )
  {
    if (vertical)
      pshint_cpos = 40;
    else
      pshint_cpos = 10;

    pshint_vertical = vertical;
  }