📄 ttobjs.c
字号:
size->GS = tt_default_graphics_state;
/* set `face->interpreter' according to the debug hook present */
{
FT_Library library = face->root.driver->root.library;
face->interpreter = (TT_Interpreter)
library->debug_hooks[FT_DEBUG_HOOK_TRUETYPE];
if ( !face->interpreter )
face->interpreter = (TT_Interpreter)TT_RunIns;
}
/* Fine, now run the font program! */
error = tt_size_run_fpgm( size );
Exit:
if ( error )
tt_size_done_bytecode( ftsize );
return error;
}
FT_LOCAL_DEF( FT_Error )
tt_size_ready_bytecode( TT_Size size )
{
FT_Error error = TT_Err_Ok;
if ( !size->bytecode_ready )
{
error = tt_size_init_bytecode( (FT_Size)size );
if ( error )
goto Exit;
}
/* rescale CVT when needed */
if ( !size->cvt_ready )
{
FT_UInt i;
TT_Face face = (TT_Face) size->root.face;
/* Scale the cvt values to the new ppem. */
/* We use by default the y ppem to scale the CVT. */
for ( i = 0; i < size->cvt_size; i++ )
size->cvt[i] = FT_MulFix( face->cvt[i], size->ttmetrics.scale );
/* all twilight points are originally zero */
for ( i = 0; i < (FT_UInt)size->twilight.n_points; i++ )
{
size->twilight.org[i].x = 0;
size->twilight.org[i].y = 0;
size->twilight.cur[i].x = 0;
size->twilight.cur[i].y = 0;
}
/* clear storage area */
for ( i = 0; i < (FT_UInt)size->storage_size; i++ )
size->storage[i] = 0;
size->GS = tt_default_graphics_state;
error = tt_size_run_prep( size );
}
Exit:
return error;
}
#else /* !TT_USE_BYTECODE_INTERPRETER */
FT_LOCAL_DEF( FT_Error )
tt_size_ready_bytecode( TT_Size size )
{
FT_UNUSED( size );
return 0;
}
#endif /* !TT_USE_BYTECODE_INTERPRETER */
/*************************************************************************/
/* */
/* <Function> */
/* tt_size_init */
/* */
/* <Description> */
/* Initialize a new TrueType size object. */
/* */
/* <InOut> */
/* size :: A handle to the size object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF( FT_Error )
tt_size_init( FT_Size ttsize ) /* TT_Size */
{
TT_Size size = (TT_Size)ttsize;
FT_Error error = TT_Err_Ok;
#ifdef TT_USE_BYTECODE_INTERPRETER
size->bytecode_ready = 0;
size->cvt_ready = 0;
#endif
size->ttmetrics.valid = FALSE;
size->strike_index = 0xFFFFFFFFUL;
return error;
}
/*************************************************************************/
/* */
/* <Function> */
/* tt_size_done */
/* */
/* <Description> */
/* The TrueType size object finalizer. */
/* */
/* <Input> */
/* size :: A handle to the target size object. */
/* */
FT_LOCAL_DEF( void )
tt_size_done( FT_Size ttsize ) /* TT_Size */
{
TT_Size size = (TT_Size)ttsize;
#ifdef TT_USE_BYTECODE_INTERPRETER
if ( size->bytecode_ready )
tt_size_done_bytecode( ttsize );
#endif
size->ttmetrics.valid = FALSE;
}
/*************************************************************************/
/* */
/* <Function> */
/* tt_size_reset */
/* */
/* <Description> */
/* Reset a TrueType size when resolutions and character dimensions */
/* have been changed. */
/* */
/* <Input> */
/* size :: A handle to the target size object. */
/* */
FT_LOCAL_DEF( FT_Error )
tt_size_reset( TT_Size size )
{
TT_Face face;
FT_Error error = TT_Err_Ok;
FT_Size_Metrics* metrics;
size->ttmetrics.valid = FALSE;
face = (TT_Face)size->root.face;
metrics = &size->metrics;
/* copy the result from base layer */
*metrics = size->root.metrics;
if ( metrics->x_ppem < 1 || metrics->y_ppem < 1 )
return TT_Err_Invalid_PPem;
/* This bit flag, if set, indicates that the ppems must be */
/* rounded to integers. Nearly all TrueType fonts have this bit */
/* set, as hinting won't work really well otherwise. */
/* */
if ( face->header.Flags & 8 )
{
metrics->x_scale = FT_DivFix( metrics->x_ppem << 6,
face->root.units_per_EM );
metrics->y_scale = FT_DivFix( metrics->y_ppem << 6,
face->root.units_per_EM );
metrics->ascender =
FT_PIX_ROUND( FT_MulFix( face->root.ascender, metrics->y_scale ) );
metrics->descender =
FT_PIX_ROUND( FT_MulFix( face->root.descender, metrics->y_scale ) );
metrics->height =
FT_PIX_ROUND( FT_MulFix( face->root.height, metrics->y_scale ) );
metrics->max_advance =
FT_PIX_ROUND( FT_MulFix( face->root.max_advance_width,
metrics->x_scale ) );
}
/* compute new transformation */
if ( metrics->x_ppem >= metrics->y_ppem )
{
size->ttmetrics.scale = metrics->x_scale;
size->ttmetrics.ppem = metrics->x_ppem;
size->ttmetrics.x_ratio = 0x10000L;
size->ttmetrics.y_ratio = FT_MulDiv( metrics->y_ppem,
0x10000L,
metrics->x_ppem );
}
else
{
size->ttmetrics.scale = metrics->y_scale;
size->ttmetrics.ppem = metrics->y_ppem;
size->ttmetrics.x_ratio = FT_MulDiv( metrics->x_ppem,
0x10000L,
metrics->y_ppem );
size->ttmetrics.y_ratio = 0x10000L;
}
#ifdef TT_USE_BYTECODE_INTERPRETER
size->cvt_ready = 0;
#endif /* TT_USE_BYTECODE_INTERPRETER */
if ( !error )
size->ttmetrics.valid = TRUE;
return error;
}
/*************************************************************************/
/* */
/* <Function> */
/* tt_driver_init */
/* */
/* <Description> */
/* Initialize a given TrueType driver object. */
/* */
/* <Input> */
/* driver :: A handle to the target driver object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF( FT_Error )
tt_driver_init( FT_Module ttdriver ) /* TT_Driver */
{
#ifdef TT_USE_BYTECODE_INTERPRETER
TT_Driver driver = (TT_Driver)ttdriver;
if ( !TT_New_Context( driver ) )
return TT_Err_Could_Not_Find_Context;
#else
FT_UNUSED( ttdriver );
#endif
return TT_Err_Ok;
}
/*************************************************************************/
/* */
/* <Function> */
/* tt_driver_done */
/* */
/* <Description> */
/* Finalize a given TrueType driver. */
/* */
/* <Input> */
/* driver :: A handle to the target TrueType driver. */
/* */
FT_LOCAL_DEF( void )
tt_driver_done( FT_Module ttdriver ) /* TT_Driver */
{
#ifdef TT_USE_BYTECODE_INTERPRETER
TT_Driver driver = (TT_Driver)ttdriver;
/* destroy the execution context */
if ( driver->context )
{
TT_Done_Context( driver->context );
driver->context = NULL;
}
#else
FT_UNUSED( ttdriver );
#endif
}
/*************************************************************************/
/* */
/* <Function> */
/* tt_slot_init */
/* */
/* <Description> */
/* Initialize a new slot object. */
/* */
/* <InOut> */
/* slot :: A handle to the slot object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
FT_LOCAL_DEF( FT_Error )
tt_slot_init( FT_GlyphSlot slot )
{
return FT_GlyphLoader_CreateExtra( slot->internal->loader );
}
/* END */
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -