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@ -4,20 +4,15 @@ |
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/* */ |
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/* TrueType and OpenType embedded bitmap support (body). */ |
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/* */ |
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/* Copyright 1996-1999 by */ |
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/* Copyright 1996-2000 by */ |
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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/* */ |
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/* This file is part of the FreeType project, and may only be used */ |
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/* modified and distributed under the terms of the FreeType project */ |
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/* This file is part of the FreeType project, and may only be used, */ |
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/* modified, and distributed under the terms of the FreeType project */ |
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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/* this file you indicate that you have read the license and */ |
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/* understand and accept it fully. */ |
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/* */ |
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/* */ |
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/* WARNING: This file should not be compiled directly, it is meant to be */ |
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/* included in the source of several font drivers (i.e., the TTF */ |
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/* and OTF drivers). */ |
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/* */ |
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/***************************************************************************/ |
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@ -76,10 +71,10 @@ |
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line_incr = target->pitch; |
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line_buff = target->buffer; |
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if (line_incr < 0) |
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line_buff -= line_incr*(target->rows-1); |
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if ( line_incr < 0 ) |
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line_buff -= line_incr * ( target->rows - 1 ); |
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line_buff += (x_offset >> 3) + y_offset * line_incr; |
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line_buff += ( x_offset >> 3 ) + y_offset * line_incr; |
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/***********************************************************************/ |
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/* */ |
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@ -112,16 +107,17 @@ |
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{ |
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FT_Byte val; |
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/* ensure that there are at least 8 bits in the accumulator */ |
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if ( loaded < 8 ) |
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{ |
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acc |= (FT_UShort)*source++ << (8 - loaded); |
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acc |= (FT_UShort)*source++ << ( 8 - loaded ); |
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loaded += 8; |
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} |
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/* now write one byte */ |
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val = (FT_Byte)(acc >> 8); |
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if (shift) |
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val = (FT_Byte)( acc >> 8 ); |
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if ( shift ) |
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{ |
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cur[0] |= val >> shift; |
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cur[1] |= val << space; |
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@ -150,12 +146,12 @@ |
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/* ensure that there are at least `count' bits in the accumulator */ |
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if ( loaded < count ) |
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{ |
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acc |= (FT_UShort)*source++ << (8 - loaded); |
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acc |= (FT_UShort)*source++ << ( 8 - loaded ); |
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loaded += 8; |
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} |
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/* now write remaining bits */ |
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val = ((FT_Byte)(acc >> 8)) & ~(0xFF >> count); |
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val = ( (FT_Byte)( acc >> 8 ) ) & ~( 0xFF >> count ); |
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cur[0] |= val >> shift; |
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if ( count > space ) |
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@ -288,6 +284,7 @@ |
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{ |
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TT_Error error; |
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if ( !ACCESS_Frame( 12L ) ) |
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{ |
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range->image_size = GET_ULong(); |
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@ -353,7 +350,7 @@ |
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{ |
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range->glyph_codes[n] = GET_UShort(); |
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if (load_offsets) |
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if ( load_offsets ) |
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range->glyph_offsets[n] = (TT_ULong)range->image_offset + |
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GET_UShort(); |
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} |
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@ -375,6 +372,7 @@ |
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/* */ |
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/* <Input> */ |
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/* range :: The target range. */ |
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/* */ |
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/* stream :: The input stream. */ |
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/* */ |
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/* <Return> */ |
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@ -395,24 +393,23 @@ |
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{ |
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TT_ULong num_glyphs, n; |
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TT_Int size_elem; |
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TT_Bool large = (range->index_format == 1); |
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TT_Bool large = ( range->index_format == 1 ); |
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num_glyphs = range->last_glyph - range->first_glyph + 1L; |
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range->num_glyphs = num_glyphs; |
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num_glyphs++; /* XXX : BEWARE - see spec */ |
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num_glyphs++; /* XXX: BEWARE - see spec */ |
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size_elem = ( large ? 4 : 2 ); |
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size_elem = large ? 4 : 2; |
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if ( ALLOC_ARRAY( range->glyph_offsets, |
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num_glyphs, TT_ULong ) || |
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ACCESS_Frame( num_glyphs * size_elem ) ) |
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goto Exit; |
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for ( n = 0; n < num_glyphs; n++ ) |
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range->glyph_offsets[n] = (TT_ULong)( range->image_offset + |
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(large ? GET_ULong() : GET_UShort()) ); |
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large ? GET_ULong() : GET_UShort() ); |
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FORGET_Frame(); |
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} |
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break; |
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@ -427,7 +424,7 @@ |
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case 5: |
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error = Load_SBit_Const_Metrics( range, stream ) || |
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Load_SBit_Range_Codes( range, stream, 0 ); |
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Load_SBit_Range_Codes( range, stream, 0 ); |
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break; |
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default: |
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@ -449,6 +446,7 @@ |
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/* */ |
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/* <Input> */ |
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/* face :: The target face object. */ |
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/* */ |
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/* stream :: The input stream. */ |
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/* */ |
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/* <Return> */ |
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@ -464,11 +462,12 @@ |
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TT_ULong num_strikes; |
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TT_ULong table_base; |
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face->num_sbit_strikes = 0; |
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/* this table is optional */ |
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error = face->goto_table( face, TTAG_EBLC, stream, 0 ); |
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if (error) |
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if ( error ) |
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{ |
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error = 0; |
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goto Exit; |
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@ -504,6 +503,7 @@ |
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TT_SBit_Strike* strike = face->sbit_strikes; |
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TT_ULong count = num_strikes; |
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if ( ACCESS_Frame( 48L * num_strikes ) ) |
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goto Exit; |
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@ -543,8 +543,8 @@ |
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while ( count > 0 ) |
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{ |
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TT_SBit_Range* range; |
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TT_ULong count2 = strike->num_ranges; |
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TT_SBit_Range* range; |
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TT_ULong count2 = strike->num_ranges; |
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if ( ALLOC_ARRAY( strike->sbit_ranges, |
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@ -630,6 +630,7 @@ |
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TT_SBit_Range* range = strike->sbit_ranges; |
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TT_SBit_Range* range_limit = range + strike->num_ranges; |
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if ( range ) |
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{ |
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for ( ; range < range_limit; range++ ) |
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@ -772,7 +773,7 @@ |
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/* */ |
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/* <Return> */ |
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/* TrueType error code. 0 means success. Returns */ |
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/* TT_Err_Invalid_Argument if no sbit exist for the requested glyph. */ |
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/* TT_Err_Invalid_Argument if no sbit exists for the requested glyph. */ |
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/* */ |
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static |
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TT_Error Find_SBit_Image( TT_Face face, |
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@ -788,7 +789,7 @@ |
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TT_SBit_Strike* strike_limit = strike + face->num_sbit_strikes; |
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if ( !strike) |
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if ( !strike ) |
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goto Fail; |
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for ( ; strike < strike_limit; strike++ ) |
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@ -828,6 +829,7 @@ |
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/* */ |
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/* <Input> */ |
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/* stream :: The input stream. */ |
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/* */ |
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/* range :: The SBit range containing the glyph. */ |
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/* */ |
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/* <Output> */ |
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@ -858,29 +860,30 @@ |
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case 2: |
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case 8: |
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/* variable small metrics */ |
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{ |
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TT_SBit_Small_Metrics smetrics; |
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{ |
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TT_SBit_Small_Metrics smetrics; |
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/* read small metrics */ |
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if ( ACCESS_Frame( 5L ) ) |
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goto Exit; |
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TT_Load_Small_SBit_Metrics( &smetrics, stream ); |
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FORGET_Frame(); |
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/* convert it to a big metrics */ |
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metrics->height = smetrics.height; |
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metrics->width = smetrics.width; |
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metrics->horiBearingX = smetrics.bearingX; |
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metrics->horiBearingY = smetrics.bearingY; |
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metrics->horiAdvance = smetrics.advance; |
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/* these metrics are made up at a higher level when */ |
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/* needed. */ |
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metrics->vertBearingX = 0; |
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metrics->vertBearingY = 0; |
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metrics->vertAdvance = 0; |
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} |
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break; |
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/* read small metrics */ |
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if ( ACCESS_Frame( 5L ) ) |
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goto Exit; |
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TT_Load_Small_SBit_Metrics( &smetrics, stream ); |
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FORGET_Frame(); |
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/* convert it to a big metrics */ |
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metrics->height = smetrics.height; |
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metrics->width = smetrics.width; |
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metrics->horiBearingX = smetrics.bearingX; |
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metrics->horiBearingY = smetrics.bearingY; |
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metrics->horiAdvance = smetrics.advance; |
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/* these metrics are made up at a higher level when */ |
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/* needed. */ |
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metrics->vertBearingX = 0; |
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metrics->vertBearingY = 0; |
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metrics->vertAdvance = 0; |
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} |
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break; |
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case 6: |
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case 7: |
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@ -895,7 +898,7 @@ |
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break; |
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case 5: |
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default: /* constant metrics */ |
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default: /* constant metrics */ |
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if ( range->index_format == 2 || range->index_format == 5 ) |
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*metrics = range->metrics; |
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else |
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@ -1058,7 +1061,7 @@ |
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val = cur[1]; |
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cur[0] = old | (val >> 7); |
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cur[0] = old | ( val >> 7 ); |
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old = val << 1; |
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cur++; |
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} |
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@ -1080,14 +1083,14 @@ |
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/* */ |
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do |
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{ |
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TT_Int right = map->width-1; |
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TT_Int right = map->width - 1; |
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TT_Byte* limit; |
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TT_Byte mask; |
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line = (TT_Byte*)map->buffer + (right >> 3); |
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limit = line + rows*line_len; |
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mask = 0x80 >> (right & 7); |
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|
|
line = (TT_Byte*)map->buffer + ( right >> 3 ); |
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|
|
limit = line + rows * line_len; |
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mask = 0x80 >> ( right & 7 ); |
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for ( ; line < limit; line += line_len ) |
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|
|
if ( line[0] & mask ) |
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|
@ -1150,10 +1153,10 @@ |
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|
|
switch ( pix_bits ) |
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{ |
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|
|
case 1: line_length = (glyph_width+7) >> 3; break; |
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|
case 2: line_length = (glyph_width+3) >> 2; break; |
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|
|
case 4: line_length = (glyph_width+1) >> 1; break; |
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|
|
default: line_length = glyph_width; |
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|
|
case 1: line_length = ( glyph_width + 7 ) >> 3; break; |
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|
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case 2: line_length = ( glyph_width + 3 ) >> 2; break; |
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|
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case 4: line_length = ( glyph_width + 1 ) >> 1; break; |
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|
|
default: line_length = glyph_width; |
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|
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} |
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|
|
glyph_size = glyph_height * line_length; |
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|
@ -1201,8 +1204,8 @@ |
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|
|
FT_Stream stream, |
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|
|
TT_SBit_Metrics* metrics ) |
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|
|
|
{ |
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|
|
FT_Memory memory = stream->memory; |
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|
|
TT_Error error; |
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|
|
FT_Memory memory = stream->memory; |
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|
|
TT_Error error; |
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|
|
|
|
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|
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|
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|
|
/* place stream at beginning of glyph data and read metrics */ |
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|
@ -1229,15 +1232,15 @@ |
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{ |
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|
|
case 1: |
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|
|
map->pixel_mode = ft_pixel_mode_mono; |
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|
|
map->pitch = (map->width+7) >> 3; |
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|
|
map->pitch = ( map->width + 7 ) >> 3; |
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|
|
break; |
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|
|
case 2: |
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|
|
map->pixel_mode = ft_pixel_mode_pal2; |
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|
|
map->pitch = (map->width+3) >> 2; |
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|
|
map->pitch = ( map->width + 3 ) >> 2; |
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|
|
break; |
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|
|
case 4: |
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|
|
map->pixel_mode = ft_pixel_mode_pal4; |
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|
|
map->pitch = (map->width+1) >> 1; |
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|
|
map->pitch = ( map->width + 1 ) >> 1; |
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|
|
break; |
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|
|
case 8: |
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|
|
map->pixel_mode = ft_pixel_mode_grays; |
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|
|
|
@ -1364,10 +1367,14 @@ |
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|
|
|
/* */ |
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|
|
|
/* glyph_index :: The current glyph index. */ |
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|
|
|
/* */ |
|
|
|
|
/* load_flags :: The glyph load flags (the code checks for the flag */ |
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|
|
|
/* FT_LOAD_CROP_BITMAP */ |
|
|
|
|
/* */ |
|
|
|
|
/* stream :: The input stream. */ |
|
|
|
|
/* */ |
|
|
|
|
/* <Output> */ |
|
|
|
|
/* map :: The target pixmap. */ |
|
|
|
|
/* */ |
|
|
|
|
/* metrics :: A big sbit metrics structure for the glyph image. */ |
|
|
|
|
/* */ |
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|
|
|
/* <Return> */ |
|
|
|
|
@ -1404,12 +1411,13 @@ |
|
|
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/* now, find the location of the `EBDT' table in */ |
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/* the font file */ |
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error = face->goto_table( face, TTAG_EBDT, stream, 0 ); |
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if (error) goto Exit; |
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if ( error ) |
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goto Exit; |
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ebdt_pos = FILE_Pos(); |
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/* clear the bitmap & load the bitmap */ |
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if (face->root.glyph->flags & ft_glyph_own_bitmap) |
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if ( face->root.glyph->flags & ft_glyph_own_bitmap ) |
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FREE( map->buffer ); |
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map->rows = map->pitch = map->width = 0; |
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@ -1439,7 +1447,7 @@ |
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} |
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/* Crop the bitmap now, unless specified otherwise */ |
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if (load_flags & FT_LOAD_CROP_BITMAP) |
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if ( load_flags & FT_LOAD_CROP_BITMAP ) |
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Crop_Bitmap( map, metrics ); |
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Exit: |
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Werner Lemberg
25 years ago