Ditch the renderer system in sdl1.3 and use the 'old fashioned' sdl/opengl context. This gives us more flexibility and less problem in receiving video events (expecially on mobile platform) as well as not having to care to reset the gl context every time sdl interferes.
This is a major sdl1.3 update so it should be tested with care (working great on ios)
/***************************************************************************/
/* */
/* gxvjust.c */
/* */
/* TrueTypeGX/AAT just table validation (body). */
/* */
/* Copyright 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
/* modified, and distributed under the terms of the FreeType project */
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/***************************************************************************/
/***************************************************************************/
/* */
/* gxvalid is derived from both gxlayout module and otvalid module. */
/* Development of gxlayout is supported by the Information-technology */
/* Promotion Agency(IPA), Japan. */
/* */
/***************************************************************************/
#include "gxvalid.h"
#include "gxvcommn.h"
#include FT_SFNT_NAMES_H
/*************************************************************************/
/* */
/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
/* messages during execution. */
/* */
#undef FT_COMPONENT
#define FT_COMPONENT trace_gxvjust
/*
* referred `just' table format specification:
* http://developer.apple.com/fonts/TTRefMan/RM06/Chap6just.html
* last updated 2000.
* ----------------------------------------------
* [JUST HEADER]: GXV_JUST_HEADER_SIZE
* version (fixed: 32bit) = 0x00010000
* format (uint16: 16bit) = 0 is only defined (2000)
* horizOffset (uint16: 16bit)
* vertOffset (uint16: 16bit)
* ----------------------------------------------
*/
typedef struct GXV_just_DataRec_
{
FT_UShort wdc_offset_max;
FT_UShort wdc_offset_min;
FT_UShort pc_offset_max;
FT_UShort pc_offset_min;
} GXV_just_DataRec, *GXV_just_Data;
#define GXV_JUST_DATA( a ) GXV_TABLE_DATA( just, a )
static void
gxv_just_wdp_entry_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_ULong justClass;
FT_Fixed beforeGrowLimit;
FT_Fixed beforeShrinkGrowLimit;
FT_Fixed afterGrowLimit;
FT_Fixed afterShrinkGrowLimit;
FT_UShort growFlags;
FT_UShort shrinkFlags;
GXV_LIMIT_CHECK( 4 + 4 + 4 + 4 + 4 + 2 + 2 );
justClass = FT_NEXT_ULONG( p );
beforeGrowLimit = FT_NEXT_ULONG( p );
beforeShrinkGrowLimit = FT_NEXT_ULONG( p );
afterGrowLimit = FT_NEXT_ULONG( p );
afterShrinkGrowLimit = FT_NEXT_ULONG( p );
growFlags = FT_NEXT_USHORT( p );
shrinkFlags = FT_NEXT_USHORT( p );
/* TODO: decode flags for human readability */
valid->subtable_length = p - table;
}
static void
gxv_just_wdc_entry_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_ULong count, i;
GXV_LIMIT_CHECK( 4 );
count = FT_NEXT_ULONG( p );
for ( i = 0; i < count; i++ )
{
GXV_TRACE(( "validating wdc pair %d/%d\n", i + 1, count ));
gxv_just_wdp_entry_validate( p, limit, valid );
p += valid->subtable_length;
}
valid->subtable_length = p - table;
}
static void
gxv_just_widthDeltaClusters_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table ;
FT_Bytes wdc_end = table + GXV_JUST_DATA( wdc_offset_max );
FT_UInt i;
GXV_NAME_ENTER( "just justDeltaClusters" );
if ( limit <= wdc_end )
FT_INVALID_OFFSET;
for ( i = 0; p <= wdc_end; i++ )
{
gxv_just_wdc_entry_validate( p, limit, valid );
p += valid->subtable_length;
}
valid->subtable_length = p - table;
GXV_EXIT;
}
static void
gxv_just_actSubrecord_type0_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_Fixed lowerLimit;
FT_Fixed upperLimit;
FT_UShort order;
FT_UShort decomposedCount;
FT_UInt i;
GXV_LIMIT_CHECK( 4 + 4 + 2 + 2 );
lowerLimit = FT_NEXT_ULONG( p );
upperLimit = FT_NEXT_ULONG( p );
order = FT_NEXT_USHORT( p );
decomposedCount = FT_NEXT_USHORT( p );
for ( i = 0; i < decomposedCount; i++ )
{
FT_UShort glyphs;
GXV_LIMIT_CHECK( 2 );
glyphs = FT_NEXT_USHORT( p );
}
valid->subtable_length = p - table;
}
static void
gxv_just_actSubrecord_type1_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_UShort addGlyph;
GXV_LIMIT_CHECK( 2 );
addGlyph = FT_NEXT_USHORT( p );
valid->subtable_length = p - table;
}
static void
gxv_just_actSubrecord_type2_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_Fixed substThreshhold; /* Apple misspelled "Threshhold" */
FT_UShort addGlyph;
FT_UShort substGlyph;
GXV_LIMIT_CHECK( 4 + 2 + 2 );
substThreshhold = FT_NEXT_ULONG( p );
addGlyph = FT_NEXT_USHORT( p );
substGlyph = FT_NEXT_USHORT( p );
valid->subtable_length = p - table;
}
static void
gxv_just_actSubrecord_type4_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_ULong variantsAxis;
FT_Fixed minimumLimit;
FT_Fixed noStretchValue;
FT_Fixed maximumLimit;
GXV_LIMIT_CHECK( 4 + 4 + 4 + 4 );
variantsAxis = FT_NEXT_ULONG( p );
minimumLimit = FT_NEXT_ULONG( p );
noStretchValue = FT_NEXT_ULONG( p );
maximumLimit = FT_NEXT_ULONG( p );
valid->subtable_length = p - table;
}
static void
gxv_just_actSubrecord_type5_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_UShort flags;
FT_UShort glyph;
GXV_LIMIT_CHECK( 2 + 2 );
flags = FT_NEXT_USHORT( p );
glyph = FT_NEXT_USHORT( p );
valid->subtable_length = p - table;
}
/* parse single actSubrecord */
static void
gxv_just_actSubrecord_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_UShort actionClass;
FT_UShort actionType;
FT_ULong actionLength;
GXV_NAME_ENTER( "just actSubrecord" );
GXV_LIMIT_CHECK( 2 + 2 + 4 );
actionClass = FT_NEXT_USHORT( p );
actionType = FT_NEXT_USHORT( p );
actionLength = FT_NEXT_ULONG( p );
if ( actionType == 0 )
gxv_just_actSubrecord_type0_validate( p, limit, valid );
else if ( actionType == 1 )
gxv_just_actSubrecord_type1_validate( p, limit, valid );
else if ( actionType == 2 )
gxv_just_actSubrecord_type2_validate( p, limit, valid );
else if ( actionType == 3 )
; /* Stretch glyph action: no actionData */
else if ( actionType == 4 )
gxv_just_actSubrecord_type4_validate( p, limit, valid );
else if ( actionType == 5 )
gxv_just_actSubrecord_type5_validate( p, limit, valid );
else
FT_INVALID_DATA;
valid->subtable_length = actionLength;
GXV_EXIT;
}
static void
gxv_just_pcActionRecord_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_ULong actionCount;
FT_ULong i;
GXV_LIMIT_CHECK( 4 );
actionCount = FT_NEXT_ULONG( p );
GXV_TRACE(( "actionCount = %d\n", actionCount ));
for ( i = 0; i < actionCount; i++ )
{
gxv_just_actSubrecord_validate( p, limit, valid );
p += valid->subtable_length;
}
valid->subtable_length = p - table;
GXV_EXIT;
}
static void
gxv_just_pcTable_LookupValue_entry_validate( FT_UShort glyph,
GXV_LookupValueCPtr value_p,
GXV_Validator valid )
{
FT_UNUSED( glyph );
if ( value_p->u > GXV_JUST_DATA( pc_offset_max ) )
GXV_JUST_DATA( pc_offset_max ) = value_p->u;
if ( value_p->u < GXV_JUST_DATA( pc_offset_max ) )
GXV_JUST_DATA( pc_offset_min ) = value_p->u;
}
static void
gxv_just_pcLookupTable_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
GXV_NAME_ENTER( "just pcLookupTable" );
GXV_JUST_DATA( pc_offset_max ) = 0x0000;
GXV_JUST_DATA( pc_offset_min ) = 0xFFFFU;
valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
valid->lookupval_func = gxv_just_pcTable_LookupValue_entry_validate;
gxv_LookupTable_validate( p, limit, valid );
/* subtable_length is set by gxv_LookupTable_validate() */
GXV_EXIT;
}
static void
gxv_just_postcompTable_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
GXV_NAME_ENTER( "just postcompTable" );
gxv_just_pcLookupTable_validate( p, limit, valid );
p += valid->subtable_length;
gxv_just_pcActionRecord_validate( p, limit, valid );
p += valid->subtable_length;
valid->subtable_length = p - table;
GXV_EXIT;
}
static void
gxv_just_classTable_entry_validate(
FT_Byte state,
FT_UShort flags,
GXV_StateTable_GlyphOffsetCPtr glyphOffset_p,
FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_UShort setMark;
FT_UShort dontAdvance;
FT_UShort markClass;
FT_UShort currentClass;
FT_UNUSED( state );
FT_UNUSED( glyphOffset_p );
FT_UNUSED( table );
FT_UNUSED( limit );
FT_UNUSED( valid );
setMark = (FT_UShort)( ( flags >> 15 ) & 1 );
dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 );
markClass = (FT_UShort)( ( flags >> 7 ) & 0x7F );
currentClass = (FT_UShort)( flags & 0x7F );
/* TODO: validate markClass & currentClass */
}
static void
gxv_just_justClassTable_validate ( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
FT_UShort length;
FT_UShort coverage;
FT_ULong subFeatureFlags;
GXV_NAME_ENTER( "just justClassTable" );
GXV_LIMIT_CHECK( 2 + 2 + 4 );
length = FT_NEXT_USHORT( p );
coverage = FT_NEXT_USHORT( p );
subFeatureFlags = FT_NEXT_ULONG( p );
GXV_TRACE(( " justClassTable: coverage = 0x%04x (%s)",
coverage,
( 0x4000 & coverage ) == 0 ? "ascending" : "descending" ));
valid->statetable.optdata = NULL;
valid->statetable.optdata_load_func = NULL;
valid->statetable.subtable_setup_func = NULL;
valid->statetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE;
valid->statetable.entry_validate_func =
gxv_just_classTable_entry_validate;
gxv_StateTable_validate( p, table + length, valid );
/* subtable_length is set by gxv_LookupTable_validate() */
GXV_EXIT;
}
static void
gxv_just_wdcTable_LookupValue_validate( FT_UShort glyph,
GXV_LookupValueCPtr value_p,
GXV_Validator valid )
{
FT_UNUSED( glyph );
if ( value_p->u > GXV_JUST_DATA( wdc_offset_max ) )
GXV_JUST_DATA( wdc_offset_max ) = value_p->u;
if ( value_p->u < GXV_JUST_DATA( wdc_offset_min ) )
GXV_JUST_DATA( wdc_offset_min ) = value_p->u;
}
static void
gxv_just_justData_lookuptable_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
FT_Bytes p = table;
GXV_JUST_DATA( wdc_offset_max ) = 0x0000;
GXV_JUST_DATA( wdc_offset_min ) = 0xFFFFU;
valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
valid->lookupval_func = gxv_just_wdcTable_LookupValue_validate;
gxv_LookupTable_validate( p, limit, valid );
/* subtable_length is set by gxv_LookupTable_validate() */
GXV_EXIT;
}
/*
* gxv_just_justData_validate() parses and validates horizData, vertData.
*/
static void
gxv_just_justData_validate( FT_Bytes table,
FT_Bytes limit,
GXV_Validator valid )
{
/*
* following 3 offsets are measured from the start of `just'
* (which table points to), not justData
*/
FT_UShort justClassTableOffset;
FT_UShort wdcTableOffset;
FT_UShort pcTableOffset;
FT_Bytes p = table;
GXV_ODTECT( 4, odtect );
GXV_NAME_ENTER( "just justData" );
GXV_ODTECT_INIT( odtect );
GXV_LIMIT_CHECK( 2 + 2 + 2 );
justClassTableOffset = FT_NEXT_USHORT( p );
wdcTableOffset = FT_NEXT_USHORT( p );
pcTableOffset = FT_NEXT_USHORT( p );
GXV_TRACE(( " (justClassTableOffset = 0x%04x)\n", justClassTableOffset ));
GXV_TRACE(( " (wdcTableOffset = 0x%04x)\n", wdcTableOffset ));
GXV_TRACE(( " (pcTableOffset = 0x%04x)\n", pcTableOffset ));
gxv_just_justData_lookuptable_validate( p, limit, valid );
gxv_odtect_add_range( p, valid->subtable_length,
"just_LookupTable", odtect );
if ( wdcTableOffset )
{
gxv_just_widthDeltaClusters_validate(
valid->root->base + wdcTableOffset, limit, valid );
gxv_odtect_add_range( valid->root->base + wdcTableOffset,
valid->subtable_length, "just_wdcTable", odtect );
}
if ( pcTableOffset )
{
gxv_just_postcompTable_validate( valid->root->base + pcTableOffset,
limit, valid );
gxv_odtect_add_range( valid->root->base + pcTableOffset,
valid->subtable_length, "just_pcTable", odtect );
}
if ( justClassTableOffset )
{
gxv_just_justClassTable_validate(
valid->root->base + justClassTableOffset, limit, valid );
gxv_odtect_add_range( valid->root->base + justClassTableOffset,
valid->subtable_length, "just_justClassTable",
odtect );
}
gxv_odtect_validate( odtect, valid );
GXV_EXIT;
}
FT_LOCAL_DEF( void )
gxv_just_validate( FT_Bytes table,
FT_Face face,
FT_Validator ftvalid )
{
FT_Bytes p = table;
FT_Bytes limit = 0;
FT_Offset table_size;
GXV_ValidatorRec validrec;
GXV_Validator valid = &validrec;
GXV_just_DataRec justrec;
GXV_just_Data just = &justrec;
FT_ULong version;
FT_UShort format;
FT_UShort horizOffset;
FT_UShort vertOffset;
GXV_ODTECT( 3, odtect );
GXV_ODTECT_INIT( odtect );
valid->root = ftvalid;
valid->table_data = just;
valid->face = face;
FT_TRACE3(( "validating `just' table\n" ));
GXV_INIT;
limit = valid->root->limit;
table_size = limit - table;
GXV_LIMIT_CHECK( 4 + 2 + 2 + 2 );
version = FT_NEXT_ULONG( p );
format = FT_NEXT_USHORT( p );
horizOffset = FT_NEXT_USHORT( p );
vertOffset = FT_NEXT_USHORT( p );
gxv_odtect_add_range( table, p - table, "just header", odtect );
/* Version 1.0 (always:2000) */
GXV_TRACE(( " (version = 0x%08x)\n", version ));
if ( version != 0x00010000UL )
FT_INVALID_FORMAT;
/* format 0 (always:2000) */
GXV_TRACE(( " (format = 0x%04x)\n", format ));
if ( format != 0x0000 )
FT_INVALID_FORMAT;
GXV_TRACE(( " (horizOffset = %d)\n", horizOffset ));
GXV_TRACE(( " (vertOffset = %d)\n", vertOffset ));
/* validate justData */
if ( 0 < horizOffset )
{
gxv_just_justData_validate( table + horizOffset, limit, valid );
gxv_odtect_add_range( table + horizOffset, valid->subtable_length,
"horizJustData", odtect );
}
if ( 0 < vertOffset )
{
gxv_just_justData_validate( table + vertOffset, limit, valid );
gxv_odtect_add_range( table + vertOffset, valid->subtable_length,
"vertJustData", odtect );
}
gxv_odtect_validate( odtect, valid );
FT_TRACE4(( "\n" ));
}
/* END */