数码相框——矢量字体原理（5）

/* example1.c                                                      *//*                                                                 *//* This small program shows how to print a rotated string with the *//* FreeType 2 library.                                             */#include <stdio.h>#include <string.h>#include <math.h>#include <wchar.h>#include <ft2build.h>#include <string.h>#include FT_FREETYPE_H #include FT_GLYPH_H#define WIDTH   80#define HEIGHT  80/* origin is the upper left corner */unsigned char image[HEIGHT][WIDTH];/* Replace this function with something useful. */voiddraw_bitmap( FT_Bitmap*  bitmap,             FT_Int      x,             FT_Int      y){  FT_Int  i, j, p, q;  FT_Int  x_max = x + bitmap->width;  FT_Int  y_max = y + bitmap->rows;//printf("x =%d,y =%d\n",x,y);  for ( i = x, p = 0; i < x_max; i++, p++ )  {    for ( j = y, q = 0; j < y_max; j++, q++ )    {      if ( i < 0      || j < 0       ||           i >= WIDTH || j >= HEIGHT )        continue;      image[j][i] |= bitmap->buffer[q * bitmap->width + p];    }  }}voidshow_image( void ){  int  i, j;  for ( i = 0; i < HEIGHT; i++ )  {  printf("%d",i);    for ( j = 0; j < WIDTH; j++ )      putchar( image[i][j] == 0 ? ' '                                : image[i][j] < 128 ? '+'                                                    : '*' );    putchar( '\n' );  }}intmain( int     argc,      char**  argv ){  FT_Library    library;  FT_Face       face;  FT_GlyphSlot  slot;  FT_Matrix     matrix;                 /* transformation matrix */  FT_Vector     pen;                    /* untransformed origin  */  FT_Error      error; FT_BBox  bbox;   FT_Glyph  glyph;   char*         filename;  char*         text;  double        angle;  int           target_height;  int           n, num_chars; //unsigned int str[]= {0x8D75,0x521B,0x007A};wchar_t *chinese_str = L"ÕÔ´´abc";unsigned int *p = (wchar_t *)chinese_str;int i;printf("Unicode:\n");for(i=0;i<wcslen(chinese_str);i++){printf("0x%x\n",p[i]);}printf("\n");  if ( argc != 2 )  {    fprintf ( stderr, "usage: %s font sample-text\n", argv[0] );    exit( 1 );  }  filename      = argv[1];                           /* first argument     */ //text          = argv[2];                           /* second argument    */ // num_chars     = strlen( text );  angle         = ( 0.0 / 360 ) * 3.14159 * 2;      /* use 25 degrees     */  target_height = HEIGHT;  error = FT_Init_FreeType( &library );              /* initialize library */  /* error handling omitted */  error = FT_New_Face( library, argv[1], 0, &face ); /* create face object */  /* error handling omitted */#if 0  /* use 50pt at 100dpi */  error = FT_Set_Char_Size( face, 50 * 64, 0,                            100, 0 );                /* set character size */  /* error handling omitted */#elseFT_Set_Pixel_Sizes(face, 24, 0);#endif  slot = face->glyph  ;  /* set up matrix */  matrix.xx = (FT_Fixed)( cos( angle ) * 0x10000L );  matrix.xy = (FT_Fixed)(-sin( angle ) * 0x10000L );  matrix.yx = (FT_Fixed)( sin( angle ) * 0x10000L );  matrix.yy = (FT_Fixed)( cos( angle ) * 0x10000L );  /* the pen position in 26.6 cartesian space coordinates; */  /* start at (0,40) relative to the upper left corner  */  pen.x = 0 * 64;  pen.y = ( target_height - 40 ) * 64;  for ( n = 0; n < wcslen(chinese_str); n++ )  {    /* set transformation */    FT_Set_Transform( face, &matrix, &pen );      /* load glyph image into the slot (erase previous one) */    error = FT_Load_Char( face, p[n], FT_LOAD_RENDER );    if ( error )      continue;                 /* ignore errors */   error = FT_Get_Glyph( face->glyph, &glyph );   if(error)   {printf("FT_Get_Glyph error\n");   }    FT_Glyph_Get_CBox( glyph, FT_GLYPH_BBOX_TRUNCATE, &bbox );    /* now, draw to our target surface (convert position) */    draw_bitmap( &slot->bitmap,                 slot->bitmap_left,                 target_height - slot->bitmap_top );printf("Unicode:0x%x\n",chinese_str[n]);printf("origin.x/64 = %d, origin.y/64 = %d\n",pen.x/64,pen.y/64);printf("lcd_x = %d,lcd_y = %d ,xMin = %d, xMax = %d,yMin = %d, yMax = %d\n ",slot->bitmap_left,target_height - slot->bitmap_top,bbox.xMin,bbox.xMax,bbox.yMin,bbox.yMax);printf("slot->advance.x/64 = %d",slot->advance.x/64);printf("slot->advance.y/64 = %d\n",slot->advance.y/64);    /* increment pen position */    pen.x += slot->advance.x;    pen.y += slot->advance.y;  }  show_image();  FT_Done_Face    ( face );  FT_Done_FreeType( library );  return 0;}/* EOF */