[gf] Add support for parsing `xxx' and `yyy' commands.
* Now gf driver supports all the `gf' font files. * Currently `xxx'and `yyy' commands if found after the postamble are skipped over. * Mechanism for extracting information from these commands is to be added.
This commit is contained in:
Parth Wazurkar
parent
256c625c6e
commit
b619592a8f
309
src/gf/gflib.c
309
src/gf/gflib.c
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@ -53,6 +53,9 @@ unsigned char bit_table[] = {
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unsigned long gf_read_uintn(FT_Stream,int);
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#define READ_UINT1( stream ) (UINT1)gf_read_uintn( stream, 1)
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#define READ_UINT2( stream ) (UINT1)gf_read_uintn( stream, 2)
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#define READ_UINT3( stream ) (UINT1)gf_read_uintn( stream, 3)
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#define READ_UINT4( stream ) (UINT1)gf_read_uintn( stream, 4)
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#define READ_UINTN( stream,n) (UINT4)gf_read_uintn( stream, n)
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#define READ_INT1( stream ) (INT1)gf_read_intn( stream, 1)
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#define READ_INT4( stream ) (INT4)gf_read_intn( stream, 4)
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@ -114,153 +117,187 @@ unsigned char bit_table[] = {
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{
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long m, n;
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int paint_sw;
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int instr;
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int instr,inst;
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INT4 min_m, max_m, min_n, max_n, del_m, del_n;
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long w, h, d;
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int m_b, k;
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unsigned char *ptr;
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FT_Error error = FT_Err_Ok;
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switch (READ_UINT1( stream ))
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for ( ; ; )
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{
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case GF_BOC:
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if ( FT_STREAM_SKIP( 4 ) )
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return -1;
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if ( FT_STREAM_SKIP( 4 ) )
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return -1;
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min_m = READ_INT4( stream );
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max_m = READ_INT4( stream );
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min_n = READ_INT4( stream );
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max_n = READ_INT4( stream );
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break;
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case GF_BOC1:
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if ( FT_STREAM_SKIP( 1 ) )
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return -1;
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del_m = (INT4)READ_UINT1( stream );
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max_m = (INT4)READ_UINT1( stream );
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del_n = (INT4)READ_UINT1( stream );
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max_n = (INT4)READ_UINT1( stream );
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min_m = max_m - del_m;
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min_n = max_n - del_n;
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break;
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default:
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return -1;
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}
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if(error != FT_Err_Ok)
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return -1;
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w = max_m - min_m + 1;
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h = max_n - min_n + 1;
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if ((w < 0) || (h < 0))
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{
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FT_ERROR(( "gf_read_glyph: invalid w and h values\n" ));
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error = FT_THROW( Invalid_File_Format );
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return -1;
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}
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/* allocate and build bitmap */
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if ((bm->bitmap = (unsigned char*)malloc(h*((w+7)/8))) == NULL)
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{
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error = FT_THROW( Invalid_File_Format );
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return -1;
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}
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memset(bm->bitmap, 0, h*((w+7)/8));
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bm->raster = (FT_UInt)(w+7)/8;
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bm->bbx_width = w;
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bm->bbx_height = h;
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bm->off_x = -min_m;
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bm->off_y = max_n;
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#if 0
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bm->mv_x = -min_m;
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bm->mv_y = max_n;
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#endif
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m = min_m;
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n = max_n;
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paint_sw = 0;
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while ((instr = (int)READ_UINT1( stream )) != GF_EOC)
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{
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if (instr == GF_PAINT_0)
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inst = READ_UINT1( stream );
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switch ((int)inst)
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{
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paint_sw = 1 - paint_sw;
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}
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else if ((GF_NEW_ROW_0 <= instr) && (instr <= GF_NEW_ROW_164))
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{
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m = min_m + (instr - GF_NEW_ROW_0);
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n = n - 1;
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paint_sw = 1;
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}
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else if ((GF_PAINT_1 <= instr) && (instr <= GF_PAINT_63))
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{
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d = (instr - GF_PAINT_1 + 1);
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goto Paint;
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}
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else
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{
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switch ((int)instr)
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{
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case GF_PAINT1:
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case GF_PAINT2:
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case GF_PAINT3:
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d = (UINT4)READ_UINTN( stream, (instr - GF_PAINT1 + 1));
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Paint:
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if (paint_sw == 0)
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{
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m = m + d;
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}
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else
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{
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ptr = &bm->bitmap[(max_n - n) * bm->raster + (m - min_m)/8];
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m_b = (m - min_m) % 8;
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while (d > 0)
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{
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*ptr |= bit_table[m_b];
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m++;
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if (++m_b >= 8)
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{
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m_b = 0;
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++ptr;
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}
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d--;
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}
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}
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paint_sw = 1 - paint_sw;
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break;
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case GF_SKIP0:
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m = min_m;
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n = n - 1;
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paint_sw = 0;
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break;
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case GF_SKIP1:
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case GF_SKIP2:
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case GF_SKIP3:
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m = min_m;
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n = n - (UINT4)READ_UINTN( stream, (instr - GF_SKIP1 + 1)) - 1;
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paint_sw = 0;
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break;
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case GF_XXX1:
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case GF_XXX2:
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case GF_XXX3:
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case GF_XXX4:
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k = READ_UINTN( stream, instr - GF_XXX1 + 1);
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if ( FT_STREAM_SKIP( k ) )
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return -1;
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break;
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case GF_YYY:
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if ( FT_STREAM_SKIP( 4 ) )
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return -1;
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break;
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case GF_NO_OP:
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break;
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default:
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FT_FREE(bm->bitmap);
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bm->bitmap = NULL;
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error = FT_THROW( Invalid_File_Format );
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case GF_BOC:
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if ( FT_STREAM_SKIP( 4 ) )
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return -1;
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}
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if ( FT_STREAM_SKIP( 4 ) )
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return -1;
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min_m = READ_INT4( stream );
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max_m = READ_INT4( stream );
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min_n = READ_INT4( stream );
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max_n = READ_INT4( stream );
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goto BOC;
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break;
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case GF_BOC1:
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if ( FT_STREAM_SKIP( 1 ) )
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return -1;
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del_m = (INT4)READ_UINT1( stream );
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max_m = (INT4)READ_UINT1( stream );
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del_n = (INT4)READ_UINT1( stream );
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max_n = (INT4)READ_UINT1( stream );
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min_m = max_m - del_m;
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min_n = max_n - del_n;
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goto BOC;
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break;
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case GF_XXX1:
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k = (UINT4)READ_UINT1( stream );
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if ( FT_STREAM_SKIP( k ) )
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return -1;
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break;
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case GF_XXX2:
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k = (UINT4)READ_UINT2( stream );
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if ( FT_STREAM_SKIP( k ) )
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return -1;
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break;
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case GF_XXX3:
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k = (UINT4)READ_UINT3( stream );
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if ( FT_STREAM_SKIP( k ) )
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return -1;
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break;
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case GF_XXX4:
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k = (UINT4)READ_UINT4( stream );
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if ( FT_STREAM_SKIP( k ) )
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return -1;
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break;
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case GF_YYY :
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if ( FT_STREAM_SKIP( 4 ) )
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return -1;
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break;
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case GF_NO_OP:
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break;
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default:
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return -1;
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}
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}
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return 0;
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BOC:
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if(error != FT_Err_Ok)
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return -1;
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w = max_m - min_m + 1;
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h = max_n - min_n + 1;
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if ((w < 0) || (h < 0))
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{
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FT_ERROR(( "gf_read_glyph: invalid w and h values\n" ));
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error = FT_THROW( Invalid_File_Format );
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return -1;
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}
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/* allocate and build bitmap */
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if ((bm->bitmap = (unsigned char*)malloc(h*((w+7)/8))) == NULL)
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{
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error = FT_THROW( Invalid_File_Format );
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return -1;
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}
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memset(bm->bitmap, 0, h*((w+7)/8));
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bm->raster = (FT_UInt)(w+7)/8;
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bm->bbx_width = w;
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bm->bbx_height = h;
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bm->off_x = -min_m;
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bm->off_y = max_n;
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#if 0
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bm->mv_x = -min_m;
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bm->mv_y = max_n;
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#endif
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m = min_m;
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n = max_n;
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paint_sw = 0;
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while ((instr = (int)READ_UINT1( stream )) != GF_EOC)
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{
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if (instr == GF_PAINT_0)
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{
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paint_sw = 1 - paint_sw;
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}
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else if ((GF_NEW_ROW_0 <= instr) && (instr <= GF_NEW_ROW_164))
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{
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m = min_m + (instr - GF_NEW_ROW_0);
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n = n - 1;
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paint_sw = 1;
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}
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else if ((GF_PAINT_1 <= instr) && (instr <= GF_PAINT_63))
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{
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d = (instr - GF_PAINT_1 + 1);
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goto Paint;
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}
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else
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{
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switch ((int)instr)
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{
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case GF_PAINT1:
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case GF_PAINT2:
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case GF_PAINT3:
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d = (UINT4)READ_UINTN( stream, (instr - GF_PAINT1 + 1));
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Paint:
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if (paint_sw == 0)
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{
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m = m + d;
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}
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else
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{
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ptr = &bm->bitmap[(max_n - n) * bm->raster + (m - min_m)/8];
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m_b = (m - min_m) % 8;
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while (d > 0)
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{
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*ptr |= bit_table[m_b];
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m++;
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if (++m_b >= 8)
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{
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m_b = 0;
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++ptr;
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}
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d--;
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}
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}
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paint_sw = 1 - paint_sw;
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break;
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case GF_SKIP0:
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m = min_m;
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n = n - 1;
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paint_sw = 0;
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break;
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case GF_SKIP1:
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case GF_SKIP2:
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case GF_SKIP3:
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m = min_m;
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n = n - (UINT4)READ_UINTN( stream, (instr - GF_SKIP1 + 1)) - 1;
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paint_sw = 0;
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break;
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case GF_XXX1:
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case GF_XXX2:
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case GF_XXX3:
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case GF_XXX4:
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k = READ_UINTN( stream, instr - GF_XXX1 + 1);
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if ( FT_STREAM_SKIP( k ) )
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return -1;
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break;
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case GF_YYY:
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if ( FT_STREAM_SKIP( 4 ) )
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return -1;
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break;
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case GF_NO_OP:
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break;
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default:
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FT_FREE(bm->bitmap);
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bm->bitmap = NULL;
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error = FT_THROW( Invalid_File_Format );
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return -1;
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}
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}
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}
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return 0;
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}
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