ref: e595014a64c1ed5adaf095e4671af3b0a6f98a1b
dir: /src/type1/t1objs.c/
/*******************************************************************
*
* t1objs.c 1.0
*
* Type1 Objects manager.
*
* Copyright 1996-1998 by
* 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.
*
******************************************************************/
#include <ftdebug.h>
#include <ftstream.h>
#include <t1gload.h>
#include <t1load.h>
#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
#include <t1hinter.h>
#endif
#include <psnames.h>
/* Required by tracing mode */
#undef FT_COMPONENT
#define FT_COMPONENT trace_t1objs
/*******************************************************************
* *
* SIZE FUNCTIONS *
* *
* *
*******************************************************************/
/*******************************************************************
*
* <Function> T1_Done_Size
*
* <Description>
* The TrueDoc instance object destructor. Used to discard
* a given instance object..
*
* <Input>
* instance :: handle to the target instance object
*
* <Return>
* TrueDoc error code. 0 means success
*
******************************************************************/
LOCAL_FUNC
void T1_Done_Size( T1_Size size )
{
if (size)
{
#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
T1_Done_Size_Hinter( size );
#endif
size->valid = 0;
}
}
/*******************************************************************
*
* <Function> T1_Init_Size
*
* <Description>
* The instance object constructor
*
* <Input>
* instance : handle to new instance object
* face : pointer to parent face object
*
* <Return>
* TrueDoc error code. 0 means success.
*
******************************************************************/
LOCAL_DEF
T1_Error T1_Init_Size( T1_Size size )
{
T1_Error error;
size->valid = 0;
#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
error = T1_New_Size_Hinter( size );
return error;
#else
(void)error;
return T1_Err_Ok;
#endif
}
/*******************************************************************
*
* <Function> T1_Reset_Size
*
* <Description>
* Resets an instance to a new pointsize/transform.
* This function is in charge of resetting the blue zones,
* As well as the stem snap tables for a given size..
*
* <Input>
* instance the instance object to destroy
*
* <Output>
* Error code.
*
******************************************************************/
LOCAL_FUNC
T1_Error T1_Reset_Size( T1_Size size )
{
#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
return T1_Reset_Size_Hinter( size );
#else
(void)size;
return 0;
#endif
}
/*******************************************************************
* *
* FACE FUNCTIONS *
* *
* *
*******************************************************************/
/*******************************************************************
*
* <Function> T1_Done_Face
*
* <Description>
* The face object destructor.
*
* <Input>
* face :: typeless pointer to the face object to destroy
*
* <Return>
* Error code.
*
******************************************************************/
LOCAL_FUNC
void T1_Done_Face( T1_Face face )
{
FT_Memory memory;
if (face)
{
memory = face->root.memory;
/* XXXX : TO DO */
}
}
/*******************************************************************
*
* <Function> T1_Init_Face
*
* <Description>
* The face object constructor.
*
* <Input>
* face :: face record to build
* Input :: input stream where to load font data
*
* <Return>
* Error code.
*
******************************************************************/
LOCAL_FUNC
T1_Error T1_Init_Face( FT_Stream stream,
FT_Int face_index,
T1_Face face )
{
T1_Tokenizer tokenizer;
T1_Error error;
PSNames_Interface* psnames;
(void)face_index;
(void)face;
face->root.num_faces = 1;
psnames = (PSNames_Interface*)face->psnames;
if (!psnames)
{
/* look-up the PSNames driver */
FT_Driver psnames_driver;
psnames_driver = FT_Get_Driver( face->root.driver->library, "psnames" );
if (psnames_driver)
face->psnames = (PSNames_Interface*)
(psnames_driver->interface.format_interface);
}
/* open the tokenizer, this will also check the font format */
error = New_Tokenizer( stream, &tokenizer );
if (error) goto Fail;
/* if we just wanted to check the format, leave successfully now */
if (face_index < 0)
goto Leave;
/* check the face index */
if ( face_index != 0 )
{
FT_ERROR(( "T1.Init_Face : invalid face index\n" ));
error = T1_Err_Invalid_Argument;
goto Leave;
}
/* Now, load the font program into the face object */
{
T1_Parser parser;
Init_T1_Parser( &parser, face, tokenizer );
error = Parse_T1_FontProgram( &parser );
if (error) goto Leave;
/* Init the face object fields */
/* Now set up root face fields */
{
FT_Face root = (FT_Face)&face->root;
T1_Font* type1 = &face->type1;
root->num_glyphs = type1->num_glyphs;
root->num_charmaps = 1;
root->face_index = face_index;
root->face_flags = FT_FACE_FLAG_SCALABLE;
root->face_flags |= FT_FACE_FLAG_HORIZONTAL;
if ( type1->is_fixed_pitch )
root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
/* XXX : TO DO - add kerning with .afm support */
/* get style name - be careful, some broken fonts only */
/* have a /FontName dictionary entry .. !! */
root->family_name = type1->family_name;
if (root->family_name)
{
char* full = type1->full_name;
char* family = root->family_name;
while ( *family && *full == *family )
{
family++;
full++;
}
root->style_name = ( *full == ' ' ? full+1 : "Regular" );
}
else
{
/* do we have a /FontName ?? */
if (type1->font_name)
{
root->family_name = type1->font_name;
root->style_name = "Regular";
}
}
/* no embedded bitmap support */
root->num_fixed_sizes = 0;
root->available_sizes = 0;
root->bbox = type1->font_bbox;
root->units_per_EM = 1000;
root->ascender = (T1_Short)type1->font_bbox.yMax;
root->descender = -(T1_Short)type1->font_bbox.yMin;
root->height = ((root->ascender + root->descender)*12)/10;
/* now compute the maximum advance width */
root->max_advance_width = type1->standard_width;
/* compute max advance width for proportional fonts */
if (!type1->is_fixed_pitch)
{
T1_Int max_advance;
error = T1_Compute_Max_Advance( face, &max_advance );
/* in case of error, keep the standard width */
if (!error)
root->max_advance_width = max_advance;
else
error = 0; /* clear error */
}
root->max_advance_height = root->height;
root->underline_position = type1->underline_position;
root->underline_thickness = type1->underline_thickness;
root->max_points = 0;
root->max_contours = 0;
}
}
Leave:
Done_Tokenizer( tokenizer );
Fail:
return error;
}
/*******************************************************************
*
* Function : Glyph_Destroy
*
* Description : The glyph object destructor.
*
* Input : _glyph typeless pointer to the glyph record to destroy
*
* Output : Error code.
*
******************************************************************/
LOCAL_FUNC
void T1_Done_GlyphSlot( T1_GlyphSlot glyph )
{
FT_Memory memory = glyph->root.face->memory;
FT_Library library = glyph->root.face->driver->library;
#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
T1_Done_Glyph_Hinter( glyph );
#endif
/* the bitmaps are created on demand */
FREE( glyph->root.bitmap.buffer );
FT_Done_Outline( library, &glyph->root.outline );
return;
}
/*******************************************************************
*
* Function : Glyph_Create
*
* Description : The glyph object constructor.
*
* Input : glyph glyph record to build.
* face the glyph's parent face.
*
* Output : Error code.
*
******************************************************************/
LOCAL_FUNC
T1_Error T1_Init_GlyphSlot( T1_GlyphSlot glyph )
{
FT_Library library = glyph->root.face->driver->library;
T1_Error error;
glyph->max_points = 0;
glyph->max_contours = 0;
glyph->root.bitmap.buffer = 0;
error = FT_New_Outline( library, 0, 0, &glyph->root.outline );
if (error) return error;
#ifndef T1_CONFIG_OPTION_DISABLE_HINTER
error = T1_New_Glyph_Hinter( glyph );
if (error)
FT_Done_Outline( library, &glyph->root.outline );
#endif
return error;
}
/*******************************************************************
*
* <Function> T1_Init_Driver
*
* <Description>
* Initialise a given Type 1 driver object
*
* <Input>
* driver :: handle to target driver object
*
* <Return>
* Error code.
*
******************************************************************/
LOCAL_FUNC
T1_Error T1_Init_Driver( T1_Driver driver )
{
(void)driver;
return T1_Err_Ok;
}
/*******************************************************************
*
* <Function> T1_Done_Driver
*
* <Description>
* finalise a given Type 1 driver
*
* <Input>
* driver :: handle to target Type 1 driver
*
******************************************************************/
LOCAL_DEF
void T1_Done_Driver( T1_Driver driver )
{
(void)driver;
}
/* END */