From 21d3754b29398abcee40e0a22e506151ba101010 Mon Sep 17 00:00:00 2001 From: Parth Wazurkar Date: Thu, 12 Jul 2018 22:33:12 +0530 Subject: [pk] Define `pk' font loader functions. * src/pk/pk.h: Add `pk' format specific opcodes. * src/pk/pklib.c: Define `pk_font_load', `pk_free_font' and other format specific utility functions. --- src/pk/pk.h | 24 ++- src/pk/pklib.c | 490 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 511 insertions(+), 3 deletions(-) diff --git a/src/pk/pk.h b/src/pk/pk.h index c0ef30564..92028ca19 100644 --- a/src/pk/pk.h +++ b/src/pk/pk.h @@ -27,7 +27,29 @@ FT_BEGIN_HEADER -/* TO-DO */ +#define FONT_DRIVER_PK 1 + +#define PK_PRE 247 +#define PK_ID 89 +#define PK_XXX1 240 +#define PK_XXX2 241 +#define PK_XXX3 242 +#define PK_XXX4 243 +#define PK_YYY 244 +#define PK_POST 245 +#define PK_NO_OP 246 + +/* Temporary TO BE REMOVED */ + +typedef char INT1; +typedef unsigned char UINT1; +typedef int INT2; +typedef unsigned int UINT2; +typedef long INT3; +typedef unsigned long UINT3; +typedef long INT4; +typedef unsigned long UINT4; + FT_END_HEADER diff --git a/src/pk/pklib.c b/src/pk/pklib.c index db4310b59..6274003ed 100644 --- a/src/pk/pklib.c +++ b/src/pk/pklib.c @@ -40,13 +40,237 @@ #undef FT_COMPONENT #define FT_COMPONENT trace_pklib +unsigned char bit_table[] = { + 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 }; + + /************************************************************************** * * PK font utility functions. * */ - /* TO-DO */ + long pk_read_intn(FT_Stream,int); + unsigned long pk_read_uintn(FT_Stream,int); + +#define READ_UINT1( stream ) (UINT1)pk_read_uintn( stream, 1) +#define READ_UINTN( stream,n) (UINT4)pk_read_uintn( stream, n) +#define READ_INT1( stream ) (INT1)pk_read_intn( stream, 1) +#define READ_INT4( stream ) (INT4)pk_read_intn( stream, 4) + +/* + * Reading a Number from file + */ + unsigned long + pk_read_uintn(FT_Stream stream, int size) + { + unsigned long v,k; + FT_Error error; + FT_Byte tp; + v = 0L; + while (size >= 1) + { + if ( FT_READ_BYTE(tp) ) + return 0; /* To be changed */ + k =(unsigned long)tp; + v = v*256L + k; + --size; + } + return v; + } + + long + pk_read_intn(FT_Stream stream, int size) + { + long v; + FT_Byte tp; + FT_Error error; + unsigned long z ; + if ( FT_READ_BYTE(tp) ) + return 0;/* To be changed */ + z= (unsigned long)tp; + v = (long)z & 0xffL; + if (v & 0x80L) + v = v - 256L; + --size; + while (size >= 1) + { + if ( FT_READ_BYTE(tp) ) + return 0;/* To be changed */ + z= (unsigned long)tp; + v = v*256L + z; + --size; + } + return v; + } + + int + pk_read_14(FT_Stream stream, int dyn_f, int bw, UINT4 rs, PK_Bitmap bm, long cc) + { + long x, y, x8, xm; + unsigned char *bm_ptr; + unsigned long bit16_buff; + int rest_bit16_buff; + static unsigned int mask_table[] = + { 0xdead, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xdead }; + + if (rs == 0) + return 0; + + x8 = bm->bbx_width / 8; + xm = bm->bbx_width % 8; + bm_ptr = bm->bitmap; + + bit16_buff = READ_UINT1( stream ) << 8; + rest_bit16_buff = 8; + --rs; + + for(y = 0; y < bm->bbx_height; y++) + { + for(x = 0; x < x8; x++) + { + *(bm_ptr++) = bit16_buff >> 8; + rest_bit16_buff -= 8; + bit16_buff = (bit16_buff << 8) & 0xffff; + if (rs > 0) + { + bit16_buff |= (READ_UINT1( stream ) << (8 - rest_bit16_buff)); + rest_bit16_buff += 8; + --rs; + } + } + if (xm != 0) + { + *(bm_ptr++) = (bit16_buff >> 8) & mask_table[xm]; + rest_bit16_buff -= xm; + bit16_buff = (bit16_buff << xm) & 0xffff; + if (rest_bit16_buff < 8) + { + if (rs > 0) + { + bit16_buff |= (READ_UINT1( stream ) << (8 - rest_bit16_buff)); + rest_bit16_buff += 8; + --rs; + } + } + } + } + return 0; + } + + int + pk_read_n14(FT_Stream stream, int dyn_f, int bw, UINT4 rs, PK_Bitmap bm, long cc) + { + long x, y, xx, yy, repeat; + int bits, b_p; + unsigned char *p, *p0, *p1; + + pk_read_nyble_init(rs); + p = bm->bitmap; + bw = 1-bw; + bits = 0; + for (y = 0; y < bm->bbx_height; ) + { + b_p = 0; + repeat = 0; + p0 = p; + for (x = 0; x < bm->bbx_width; x++) + { + if (bits == 0) + { + bw = 1-bw; + if ((bits = pk_read_packed_number(&repeat, stream, dyn_f)) < 0) + return -1; + } + if (bw == 1) + *p = *p | bit_table[b_p]; + --bits; + if (++b_p >= 8) + { + b_p = 0; + p++; + } + } + if (b_p != 0) + p++; + y++; + for (yy = 0; yy < repeat; yy++) + { + p1 = p0; + for (xx = 0; xx < bm->raster; xx++) + *(p++) = *(p1++); + y++; + } + } + return 0; + } + + long + pk_read_packed_number(long* repeat, FT_Stream, int dyn_f) + { + int d, n; + long di; + + entry: + d = pk_read_nyble( stream ); + if (d == 0) + { + n = 0; + do + { + di = pk_read_nyble( stream ); + n++; + } + while (di == 0); + for ( ; n > 0; n--) + di = di*16 + pk_read_nyble( stream ); + return di - 15 + (13 - dyn_f)*16 + dyn_f; + } + if (d <= dyn_f) + return d; + if (d <= 13) + return (d - dyn_f - 1)*16 + pk_read_nyble( stream ) + dyn_f + 1; + *repeat = 1; + if (d == 14) + *repeat = pk_read_packed_number(repeat, stream, dyn_f); + goto entry; + } + + int pk_read_nyble_rest_cnt; + int pk_read_nyble_max_bytes; + + void + pk_read_nyble_init(int max) + { + pk_read_nyble_rest_cnt = 0; + pk_read_nyble_max_bytes = max; + } + + int + pk_read_nyble(FT_Stream stream) + { + static UINT1 d; + int v; + + switch (pk_read_nyble_rest_cnt) + { + case 0: + d = READ_UINT1( stream ); + if (--pk_read_nyble_max_bytes < 0) + return -1L; + v = d / 0x10; + d = d % 0x10; + pk_read_nyble_rest_cnt = 1; + break; + case 1: + default: + v = d; + pk_read_nyble_rest_cnt = 0; + break; + } + return v; + } + /************************************************************************** * @@ -54,6 +278,268 @@ * */ - /* TO-DO */ + FT_LOCAL_DEF( FT_Error ) + pk_load_font(FT_Stream stream, + FT_Memory extmemory, + PK_Glyph *goptr ) + { + PK_Glyph go; + UINT1 instr; + UINT4 ds, check_sum, hppp, vppp, k; + unsigned int flag, dny_f, bw, ess, size; + UINT4 cc, tfm, dx, dy, dm, w, h, rs; + INT4 hoff, voff, mv_x, mv_y; + long gptr; + int bc, ec, nchars, index, i; + + k = READ_UINT1( stream ); + if ( FT_STREAM_SKIP( k ) ) + goto Exit; + ds = READ_UINT4( stream ); + check_sum = READ_UINT4( stream ); + hppp = READ_UINT4( stream ); + vppp = READ_UINT4( stream ); + + /* gptr = ftell(fp); */ + gptr = stream->pos; + + #if 0 + /* read min & max char code */ + bc = 256; + ec = -1; + for (;;) + { + instr = READ_UINT1( stream ); + if (instr == PK_POST) + break; + switch ((int) instr) + { + case PK_XXX1: k = (UINT4)READ_UINT1( stream ); if ( FT_STREAM_SKIP( k ) ) goto Exit; break; + case PK_XXX2: k = (UINT4)READ_UINT2( stream ); if ( FT_STREAM_SKIP( k ) ) goto Exit; break; + case PK_XXX3: k = (UINT4)READ_UINT3( stream ); if ( FT_STREAM_SKIP( k ) ) goto Exit; break; + case PK_XXX4: k = (UINT4)READ_UINT4( stream ); if ( FT_STREAM_SKIP( k ) ) goto Exit; break; + case PK_YYY: if ( FT_STREAM_SKIP( 4 ) ) goto Exit; break; + case PK_NO_OP: break; + default: + size = instr & 0x3; instr >>= 2; + ess = instr & 0x1; + if (ess == 0) + { /* short */ + rs = (UINT4)(size*256) + (UINT4)READ_UINT1( stream ); + cc = (UINT4)READ_UINT1( stream ); + } + else if ((ess == 1) && (size != 3)) + { /* extended short */ + rs = (UINT4)(size*65536) + (UINT4)READ_UINT2( stream ); + cc = (UINT4)READ_UINT1( stream ); + } + else + { /* standard */ + rs = READ_UINT4( stream ); + cc = (UINT4)READ_UINT4( stream ); + } + if ( FT_STREAM_SKIP( rs ) ) + goto Exit; + if (cc < bc) + bc = cc; + if (cc > ec) + ec = cc; + break; + } + } + #else + bc = 0; + ec = 255; + #endif + + nchars = ec - bc + 1; + if( FT_ALLOC(go, sizeof(PK_GlyphRec)) ) + goto Exit; + + if( FT_ALLOC_MULT(go->bm_table, sizeof(PK_BitmapRec), nchars) ) + goto Exit; + + for (i = 0; i < nchars; i++) + go->bm_table[i].bitmap = NULL; + + go->ds = (double)ds/(1<<20); + go->hppp = (double)hppp/(1<<16); + go->vppp = (double)vppp/(1<<16); + go->font_bbx_w = 0; + go->font_bbx_h = 0; + go->font_bbx_xoff = 0; + go->font_bbx_yoff = 0; + go->code_min = bc; + go->code_max = ec; + + /* read glyphs */ + /* fseek(fp, gptr, SEEK_SET); */ + if( FT_STREAM_SEEK( gptr ) ) + goto Exit; + + for (;;) + { + if ((instr = READ_UINT1( stream )) == PK_POST) + break; + switch ((int)instr) + { + case PK_XXX1: + k = (UINT4)READ_UINT1( stream ); + if ( FT_STREAM_SKIP( k ) ) + goto Exit; + break; + case PK_XXX2: + k = (UINT4)READ_UINT2( stream ); + if ( FT_STREAM_SKIP( k ) ) + goto Exit; + break; + case PK_XXX3: + k = (UINT4)READ_UINT3( stream ); + if ( FT_STREAM_SKIP( k ) ) + goto Exit; + break; + case PK_XXX4: + k = (UINT4)READ_UINT4( stream ); + if ( FT_STREAM_SKIP( k ) ) + goto Exit; + break; + case PK_YYY: + if ( FT_STREAM_SKIP( 4 ) ) + goto Exit; + break; + case PK_NO_OP: + break; + default: + flag = instr; + size = flag % 0x04; flag = flag >> 2; + ess = flag % 0x02; flag = flag >> 1; + bw = flag % 0x02; flag = flag >> 1; + dny_f = flag % 0x10; + if (ess == 0) + { /* short */ + rs = (UINT4)(size*256) + (UINT4)READ_UINT1( stream ) - (UINT4)8; + cc = (UINT4)READ_UINT1( stream ); + tfm = (UINT4)READ_UINT3( stream ); + dm = (UINT4)READ_UINT1( stream ); + w = (UINT4)READ_UINT1( stream ); + h = (UINT4)READ_UINT1( stream ); + hoff = (INT4)READ_INT1( stream ); + voff = (INT4)READ_INT1( stream ); + mv_x = dm; + mv_y = 0; + } + else if ((ess == 1) && (size != 3)) + { /* extended short */ + rs = (UINT4)(size*65536) + (UINT4)READ_UINT2( stream ) - (UINT4)13; + cc = (UINT4)READ_UINT1( stream ); + tfm = (UINT4)READ_UINT3( stream ); + dm = (UINT4)READ_UINT2( stream ); + w = (UINT4)READ_UINT2( stream ); + h = (UINT4)READ_UINT2( stream ); + hoff = (INT4)READ_INT2( stream ); + voff = (INT4)READ_INT2( stream ); + mv_x = dm; + mv_y = 0; + } + else + { /* standard */ + rs = READ_UINT4( stream ) - (UINT4)28; + cc = READ_UINT4( stream ); + tfm = READ_UINT4( stream ); + dx = READ_UINT4( stream ); + dy = READ_UINT4( stream ); + w = READ_UINT4( stream ); + h = READ_UINT4( stream ); + hoff = READ_INT4( stream ); + voff = READ_INT4( stream ); + mv_x = (double)dx/(double)(1<<16); + mv_y = (double)dy/(double)(1<<16); + } + + if ((cc < go->code_min) || (go->code_max < cc)) + { + error = FT_THROW( Invalid_File_Format ); + goto Exit; + } + index = cc - go->code_min; + go->bm_table[index].bbx_width = w; + go->bm_table[index].bbx_height = h; + go->bm_table[index].raster = (w+7)/8; + go->bm_table[index].off_x = -hoff; + go->bm_table[index].off_y = voff; + go->bm_table[index].mv_x = mv_x; + go->bm_table[index].mv_y = mv_y; + go->bm_table[index].bitmap = (unsigned char*)malloc(h*((w+7)/8)); + + if (go->bm_table[index].bitmap == NULL) + { + error = FT_THROW( Invalid_File_Format ); + goto Exit; + } + + memset(go->bm_table[index].bitmap, 0, h*((w+7)/8)); + + if (dny_f == 14) + { + if (pk_read_14(stream, dny_f, bw, rs, &(go->bm_table[index]), cc) < 0) + { + /* vf_error = VF_ERR_ILL_FONT_FILE; (FOR TRACING) */ + error = FT_THROW( Invalid_File_Format ); + goto Exit; + } + } + else + { + if (pk_read_n14(stream, dny_f, bw, rs, &(go->bm_table[index]), cc) < 0) + { + /* vf_error = VF_ERR_ILL_FONT_FILE; (FOR TRACING) */ + error = FT_THROW( Invalid_File_Format ); + goto Exit; + } + } + if (go->font_bbx_w < w) + go->font_bbx_w = w; + if (go->font_bbx_h < h) + go->font_bbx_h = h; + if (go->font_bbx_xoff > -hoff) + go->font_bbx_xoff = -hoff; + if (go->font_bbx_yoff > (voff - h)) + go->font_bbx_yoff = (voff - h); + } + } + *goptr = go; + return error; + + Exit: + for (i = 0; i < nchars; i++) + { + if (go->bm_table[i].bitmap != NULL) + FT_FREE(go->bm_table[i].bitmap); + } + FT_FREE(go->bm_table); + FT_FREE(go); + } + + FT_LOCAL_DEF( void ) + pk_free_font( PK_Face face ) + { + FT_Memory memory = FT_FACE( face )->memory; + GF_Glyph go = face->pk_glyph; + FT_UInt nchars = FT_FACE( face )->num_glyphs,i; + + if ( !go ) + return; + + if( go->bm_table ) + { + for (i = 0; i < nchars; i++) + { + if (go->bm_table[i].bitmap != NULL) + FT_FREE(go->bm_table[i].bitmap); + } + } + FT_FREE(go->bm_table); + FT_FREE(go); + } /* END */ -- cgit v1.2.1