ref: ef3c12650edd2dfa462f661596f3f62843846c1c
dir: /src/base/ftapi.c/
/***************************************************************************/
/* */
/* ftobjs.c */
/* */
/* The FreeType private base classes (body). */
/* */
/* Copyright 1996-2001 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 <ft2build.h>
#include FT_LIST_H
#include FT_OUTLINE_H
#include FT_INTERNAL_OBJECTS_H
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_STREAM_H
#include FT_TRUETYPE_TABLES_H
#include FT_OUTLINE_H
#include <string.h> /* for strcmp() */
/* documentation is in freetype.h */
FT_EXPORT_DEF( void )
FT_Set_Transform( FT_Face face,
FT_Matrix* matrix,
FT_Vector* delta )
{
FT_Face_Internal internal;
if ( !face )
return;
internal = face->internal;
internal->transform_flags = 0;
if ( !matrix )
{
internal->transform_matrix.xx = 0x10000L;
internal->transform_matrix.xy = 0;
internal->transform_matrix.yx = 0;
internal->transform_matrix.yy = 0x10000L;
matrix = &internal->transform_matrix;
}
else
internal->transform_matrix = *matrix;
/* set transform_flags bit flag 0 if `matrix' isn't the identity */
if ( ( matrix->xy | matrix->yx ) ||
matrix->xx != 0x10000L ||
matrix->yy != 0x10000L )
internal->transform_flags |= 1;
if ( !delta )
{
internal->transform_delta.x = 0;
internal->transform_delta.y = 0;
delta = &internal->transform_delta;
}
else
internal->transform_delta = *delta;
/* set transform_flags bit flag 1 if `delta' isn't the null vector */
if ( delta->x | delta->y )
internal->transform_flags |= 2;
}
static FT_Renderer
ft_lookup_glyph_renderer( FT_GlyphSlot slot );
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Load_Glyph( FT_Face face,
FT_UInt glyph_index,
FT_Int load_flags )
{
FT_Error error;
FT_Driver driver;
FT_GlyphSlot slot;
FT_Library library;
FT_Bool autohint;
FT_Module hinter;
if ( !face || !face->size || !face->glyph )
return FT_Err_Invalid_Face_Handle;
if ( glyph_index >= (FT_UInt)face->num_glyphs )
return FT_Err_Invalid_Argument;
slot = face->glyph;
ft_glyphslot_clear( slot );
driver = face->driver;
/* if the flag NO_RECURSE is set, we disable hinting and scaling */
if ( load_flags & FT_LOAD_NO_RECURSE )
{
/* disable scaling, hinting, and transformation */
load_flags |= FT_LOAD_NO_SCALE |
FT_LOAD_NO_HINTING |
FT_LOAD_IGNORE_TRANSFORM;
/* disable bitmap rendering */
load_flags &= ~FT_LOAD_RENDER;
}
/* do we need to load the glyph through the auto-hinter? */
library = driver->root.library;
hinter = library->auto_hinter;
autohint =
FT_BOOL( hinter &&
!( load_flags & ( FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING ) ) &&
FT_DRIVER_IS_SCALABLE( driver ) &&
FT_DRIVER_USES_OUTLINES( driver ) );
if ( autohint )
{
if ( FT_DRIVER_HAS_HINTER( driver ) &&
!( load_flags & FT_LOAD_FORCE_AUTOHINT ) )
autohint = 0;
}
if ( autohint )
{
FT_AutoHinter_Service hinting;
/* try to load embedded bitmaps first if available */
/* */
/* XXX: This is really a temporary hack that should disappear */
/* promptly with FreeType 2.1! */
/* */
if ( FT_HAS_FIXED_SIZES( face ) )
{
error = driver->clazz->load_glyph( slot, face->size,
glyph_index,
load_flags | FT_LOAD_SBITS_ONLY );
if ( !error && slot->format == ft_glyph_format_bitmap )
goto Load_Ok;
}
/* load auto-hinted outline */
hinting = (FT_AutoHinter_Service)hinter->clazz->module_interface;
error = hinting->load_glyph( (FT_AutoHinter)hinter,
slot, face->size,
glyph_index, load_flags );
}
else
{
error = driver->clazz->load_glyph( slot,
face->size,
glyph_index,
load_flags );
if ( error )
goto Exit;
/* check that the loaded outline is correct */
error = FT_Outline_Check( &slot->outline );
if ( error )
goto Exit;
}
Load_Ok:
/* compute the advance */
if ( load_flags & FT_LOAD_VERTICAL_LAYOUT )
{
slot->advance.x = 0;
slot->advance.y = slot->metrics.vertAdvance;
}
else
{
slot->advance.x = slot->metrics.horiAdvance;
slot->advance.y = 0;
}
/* compute the linear advance in 16.16 pixels */
if ( ( load_flags & FT_LOAD_LINEAR_DESIGN ) == 0 )
{
FT_UInt EM = face->units_per_EM;
FT_Size_Metrics* metrics = &face->size->metrics;
slot->linearHoriAdvance = FT_MulDiv( slot->linearHoriAdvance,
(FT_Long)metrics->x_ppem << 16, EM );
slot->linearVertAdvance = FT_MulDiv( slot->linearVertAdvance,
(FT_Long)metrics->y_ppem << 16, EM );
}
if ( ( load_flags & FT_LOAD_IGNORE_TRANSFORM ) == 0 )
{
FT_Face_Internal internal = face->internal;
/* now, transform the glyph image if needed */
if ( internal->transform_flags )
{
/* get renderer */
FT_Renderer renderer = ft_lookup_glyph_renderer( slot );
if ( renderer )
error = renderer->clazz->transform_glyph(
renderer, slot,
&internal->transform_matrix,
&internal->transform_delta );
/* transform advance */
FT_Vector_Transform( &slot->advance, &internal->transform_matrix );
}
}
/* do we need to render the image now? */
if ( !error &&
slot->format != ft_glyph_format_bitmap &&
slot->format != ft_glyph_format_composite &&
load_flags & FT_LOAD_RENDER )
{
error = FT_Render_Glyph( slot,
( load_flags & FT_LOAD_MONOCHROME )
? ft_render_mode_mono
: ft_render_mode_normal );
}
Exit:
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Load_Char( FT_Face face,
FT_ULong char_code,
FT_Int load_flags )
{
FT_UInt glyph_index;
if ( !face )
return FT_Err_Invalid_Face_Handle;
glyph_index = (FT_UInt)char_code;
if ( face->charmap )
glyph_index = FT_Stream_Get_Char_Index( face, char_code );
return FT_Load_Glyph( face, glyph_index, load_flags );
}
/* destructor for sizes list */
static void
destroy_size( FT_Memory memory,
FT_Size size,
FT_Driver driver )
{
/* finalize client-specific data */
if ( size->generic.finalizer )
size->generic.finalizer( size );
/* finalize format-specific stuff */
if ( driver->clazz->done_size )
driver->clazz->done_size( size );
FREE( size->internal );
FREE( size );
}
/* destructor for faces list */
static void
destroy_face( FT_Memory memory,
FT_Face face,
FT_Driver driver )
{
FT_Driver_Class clazz = driver->clazz;
/* discard auto-hinting data */
if ( face->autohint.finalizer )
face->autohint.finalizer( face->autohint.data );
/* Discard glyph slots for this face */
/* Beware! FT_GlyphSlot_New() changes the field `face->glyph' */
while ( face->glyph )
FT_GlyphSlot_New( face->glyph );
/* Discard all sizes for this face */
FT_List_Finalize( &face->sizes_list,
(FT_List_Destructor)destroy_size,
memory,
driver );
face->size = 0;
/* Now discard client data */
if ( face->generic.finalizer )
face->generic.finalizer( face );
/* finalize format-specific stuff */
if ( clazz->done_face )
clazz->done_face( face );
/* close the stream for this face if needed */
ft_done_stream(
&face->stream,
( face->face_flags & FT_FACE_FLAG_EXTERNAL_STREAM ) != 0 );
/* get rid of it */
if ( face->internal )
{
FREE( face->internal->postscript_name );
FREE( face->internal );
}
FREE( face );
}
static void
ft_driver_destroy( FT_Driver driver )
{
FT_List_Finalize( &driver->faces_list,
(FT_List_Destructor)destroy_face,
driver->root.memory,
driver );
/* check whether we need to drop the driver's glyph loader */
if ( FT_DRIVER_USES_OUTLINES( driver ) )
FT_GlyphLoader_Done( driver->glyph_loader );
}
/*************************************************************************/
/* */
/* <Function> */
/* open_face */
/* */
/* <Description> */
/* This function does some work for FT_Open_Face(). */
/* */
static FT_Error
open_face( FT_Driver driver,
FT_Stream stream,
FT_Long face_index,
FT_Int num_params,
FT_Parameter* params,
FT_Face* aface )
{
FT_Memory memory;
FT_Driver_Class clazz;
FT_Face face = 0;
FT_Error error;
FT_Face_Internal internal;
clazz = driver->clazz;
memory = driver->root.memory;
/* allocate the face object and perform basic initialization */
if ( ALLOC( face, clazz->face_object_size ) )
goto Fail;
if ( ALLOC( internal, sizeof ( *internal ) ) )
goto Fail;
face->internal = internal;
face->driver = driver;
face->memory = memory;
face->stream = stream;
error = clazz->init_face( stream,
face,
face_index,
num_params,
params );
if ( error )
goto Fail;
*aface = face;
Fail:
if ( error )
{
clazz->done_face( face );
FREE( face->internal );
FREE( face );
*aface = 0;
}
return error;
}
/* there's a Mac-specific extended implementation of FT_New_Face() */
/* in src/mac/ftmac.c */
#ifndef macintosh
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_New_Face( FT_Library library,
const char* pathname,
FT_Long face_index,
FT_Face *aface )
{
FT_Open_Args args;
/* test for valid `library' and `aface' delayed to FT_Open_Face() */
if ( !pathname )
return FT_Err_Invalid_Argument;
args.flags = ft_open_pathname;
args.pathname = (char*)pathname;
return FT_Open_Face( library, &args, face_index, aface );
}
#endif /* !macintosh */
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_New_Memory_Face( FT_Library library,
const FT_Byte* file_base,
FT_Long file_size,
FT_Long face_index,
FT_Face *aface )
{
FT_Open_Args args;
/* test for valid `library' and `face' delayed to FT_Open_Face() */
if ( !file_base )
return FT_Err_Invalid_Argument;
args.flags = ft_open_memory;
args.memory_base = file_base;
args.memory_size = file_size;
return FT_Open_Face( library, &args, face_index, aface );
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Open_Face( FT_Library library,
FT_Open_Args* args,
FT_Long face_index,
FT_Face *aface )
{
FT_Error error;
FT_Driver driver;
FT_Memory memory;
FT_Stream stream;
FT_Face face = 0;
FT_ListNode node = 0;
FT_Bool external_stream;
/* test for valid `library' delayed to */
/* ft_new_input_stream() */
if ( !aface || !args )
return FT_Err_Invalid_Argument;
*aface = 0;
external_stream = FT_BOOL( ( args->flags & ft_open_stream ) &&
args->stream );
/* create input stream */
error = ft_new_input_stream( library, args, &stream );
if ( error )
goto Exit;
memory = library->memory;
/* If the font driver is specified in the `args' structure, use */
/* it. Otherwise, we scan the list of registered drivers. */
if ( ( args->flags & ft_open_driver ) && args->driver )
{
driver = FT_DRIVER( args->driver );
/* not all modules are drivers, so check... */
if ( FT_MODULE_IS_DRIVER( driver ) )
{
FT_Int num_params = 0;
FT_Parameter* params = 0;
if ( args->flags & ft_open_params )
{
num_params = args->num_params;
params = args->params;
}
error = open_face( driver, stream, face_index,
num_params, params, &face );
if ( !error )
goto Success;
}
else
error = FT_Err_Invalid_Handle;
ft_done_stream( &stream, external_stream );
goto Fail;
}
else
{
/* check each font driver for an appropriate format */
FT_Module* cur = library->modules;
FT_Module* limit = cur + library->num_modules;
for ( ; cur < limit; cur++ )
{
/* not all modules are font drivers, so check... */
if ( FT_MODULE_IS_DRIVER( cur[0] ) )
{
FT_Int num_params = 0;
FT_Parameter* params = 0;
driver = FT_DRIVER( cur[0] );
if ( args->flags & ft_open_params )
{
num_params = args->num_params;
params = args->params;
}
error = open_face( driver, stream, face_index,
num_params, params, &face );
if ( !error )
goto Success;
if ( FT_ERROR_BASE( error ) != FT_Err_Unknown_File_Format )
goto Fail2;
}
}
/* no driver is able to handle this format */
error = FT_Err_Unknown_File_Format;
Fail2:
ft_done_stream( &stream, external_stream );
goto Fail;
}
Success:
FT_TRACE4(( "FT_Open_Face: New face object, adding to list\n" ));
/* set the FT_FACE_FLAG_EXTERNAL_STREAM bit for FT_Done_Face */
if ( external_stream )
face->face_flags |= FT_FACE_FLAG_EXTERNAL_STREAM;
/* add the face object to its driver's list */
if ( ALLOC( node, sizeof ( *node ) ) )
goto Fail;
node->data = face;
/* don't assume driver is the same as face->driver, so use */
/* face->driver instead. */
FT_List_Add( &face->driver->faces_list, node );
/* now allocate a glyph slot object for the face */
{
FT_GlyphSlot slot;
FT_TRACE4(( "FT_Open_Face: Creating glyph slot\n" ));
error = FT_GlyphSlot_New( face, &slot );
if ( error )
goto Fail;
face->glyph = slot;
}
/* finally, allocate a size object for the face */
{
FT_Size size;
FT_TRACE4(( "FT_Open_Face: Creating size object\n" ));
error = FT_New_Size( face, &size );
if ( error )
goto Fail;
face->size = size;
}
/* initialize internal face data */
{
FT_Face_Internal internal = face->internal;
internal->transform_matrix.xx = 0x10000L;
internal->transform_matrix.xy = 0;
internal->transform_matrix.yx = 0;
internal->transform_matrix.yy = 0x10000L;
internal->transform_delta.x = 0;
internal->transform_delta.y = 0;
}
*aface = face;
goto Exit;
Fail:
FT_Done_Face( face );
Exit:
FT_TRACE4(( "FT_Open_Face: Return %d\n", error ));
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Attach_File( FT_Face face,
const char* filepathname )
{
FT_Open_Args open;
/* test for valid `face' delayed to FT_Attach_Stream() */
if ( !filepathname )
return FT_Err_Invalid_Argument;
open.flags = ft_open_pathname;
open.pathname = (char*)filepathname;
return FT_Attach_Stream( face, &open );
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Attach_Stream( FT_Face face,
FT_Open_Args* parameters )
{
FT_Stream stream;
FT_Error error;
FT_Driver driver;
FT_Driver_Class clazz;
/* test for valid `parameters' delayed to ft_new_input_stream() */
if ( !face )
return FT_Err_Invalid_Face_Handle;
driver = face->driver;
if ( !driver )
return FT_Err_Invalid_Driver_Handle;
error = ft_new_input_stream( driver->root.library, parameters, &stream );
if ( error )
goto Exit;
/* we implement FT_Attach_Stream in each driver through the */
/* `attach_file' interface */
error = FT_Err_Unimplemented_Feature;
clazz = driver->clazz;
if ( clazz->attach_file )
error = clazz->attach_file( face, stream );
/* close the attached stream */
ft_done_stream( &stream,
(FT_Bool)( parameters->stream &&
( parameters->flags & ft_open_stream ) ) );
Exit:
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Done_Face( FT_Face face )
{
FT_Error error;
FT_Driver driver;
FT_Memory memory;
FT_ListNode node;
error = FT_Err_Invalid_Face_Handle;
if ( face && face->driver )
{
driver = face->driver;
memory = driver->root.memory;
/* find face in driver's list */
node = FT_List_Find( &driver->faces_list, face );
if ( node )
{
/* remove face object from the driver's list */
FT_List_Remove( &driver->faces_list, node );
FREE( node );
/* now destroy the object proper */
destroy_face( memory, face, driver );
error = FT_Err_Ok;
}
}
return error;
}
/* documentation is in ftobjs.h */
FT_EXPORT_DEF( FT_Error )
FT_New_Size( FT_Face face,
FT_Size *asize )
{
FT_Error error;
FT_Memory memory;
FT_Driver driver;
FT_Driver_Class clazz;
FT_Size size = 0;
FT_ListNode node = 0;
if ( !face )
return FT_Err_Invalid_Face_Handle;
if ( !asize )
return FT_Err_Invalid_Size_Handle;
if ( !face->driver )
return FT_Err_Invalid_Driver_Handle;
*asize = 0;
driver = face->driver;
clazz = driver->clazz;
memory = face->memory;
/* Allocate new size object and perform basic initialisation */
if ( ALLOC( size, clazz->size_object_size ) ||
ALLOC( node, sizeof ( FT_ListNodeRec ) ) )
goto Exit;
size->face = face;
/* for now, do not use any internal fields in size objects */
size->internal = 0;
if ( clazz->init_size )
error = clazz->init_size( size );
/* in case of success, add to the face's list */
if ( !error )
{
*asize = size;
node->data = size;
FT_List_Add( &face->sizes_list, node );
}
Exit:
if ( error )
{
FREE( node );
FREE( size );
}
return error;
}
/* documentation is in ftobjs.h */
FT_EXPORT_DEF( FT_Error )
FT_Done_Size( FT_Size size )
{
FT_Error error;
FT_Driver driver;
FT_Memory memory;
FT_Face face;
FT_ListNode node;
if ( !size )
return FT_Err_Invalid_Size_Handle;
face = size->face;
if ( !face )
return FT_Err_Invalid_Face_Handle;
driver = face->driver;
if ( !driver )
return FT_Err_Invalid_Driver_Handle;
memory = driver->root.memory;
error = FT_Err_Ok;
node = FT_List_Find( &face->sizes_list, size );
if ( node )
{
FT_List_Remove( &face->sizes_list, node );
FREE( node );
if ( face->size == size )
{
face->size = 0;
if ( face->sizes_list.head )
face->size = (FT_Size)(face->sizes_list.head->data);
}
destroy_size( memory, size, driver );
}
else
error = FT_Err_Invalid_Size_Handle;
return error;
}
static void
ft_recompute_scaled_metrics( FT_Face face,
FT_Size_Metrics* metrics )
{
/* Compute root ascender, descender, test height, and max_advance */
metrics->ascender = ( FT_MulFix( face->ascender,
metrics->y_scale ) + 32 ) & -64;
metrics->descender = ( FT_MulFix( face->descender,
metrics->y_scale ) + 32 ) & -64;
metrics->height = ( FT_MulFix( face->height,
metrics->y_scale ) + 32 ) & -64;
metrics->max_advance = ( FT_MulFix( face->max_advance_width,
metrics->x_scale ) + 32 ) & -64;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Set_Char_Size( FT_Face face,
FT_F26Dot6 char_width,
FT_F26Dot6 char_height,
FT_UInt horz_resolution,
FT_UInt vert_resolution )
{
FT_Error error = FT_Err_Ok;
FT_Driver driver;
FT_Driver_Class clazz;
FT_Size_Metrics* metrics;
FT_Long dim_x, dim_y;
if ( !face || !face->size || !face->driver )
return FT_Err_Invalid_Face_Handle;
driver = face->driver;
metrics = &face->size->metrics;
if ( !char_width )
char_width = char_height;
else if ( !char_height )
char_height = char_width;
if ( !horz_resolution )
horz_resolution = 72;
if ( !vert_resolution )
vert_resolution = 72;
driver = face->driver;
clazz = driver->clazz;
/* default processing -- this can be overridden by the driver */
if ( char_width < 1 * 64 )
char_width = 1 * 64;
if ( char_height < 1 * 64 )
char_height = 1 * 64;
/* Compute pixel sizes in 26.6 units */
dim_x = ( ( ( char_width * horz_resolution ) / 72 ) + 32 ) & -64;
dim_y = ( ( ( char_height * vert_resolution ) / 72 ) + 32 ) & -64;
metrics->x_ppem = (FT_UShort)( dim_x >> 6 );
metrics->y_ppem = (FT_UShort)( dim_y >> 6 );
metrics->x_scale = 0x10000L;
metrics->y_scale = 0x10000L;
if ( face->face_flags & FT_FACE_FLAG_SCALABLE )
{
metrics->x_scale = FT_DivFix( dim_x, face->units_per_EM );
metrics->y_scale = FT_DivFix( dim_y, face->units_per_EM );
ft_recompute_scaled_metrics( face, metrics );
}
if ( clazz->set_char_sizes )
error = clazz->set_char_sizes( face->size,
char_width,
char_height,
horz_resolution,
vert_resolution );
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Set_Pixel_Sizes( FT_Face face,
FT_UInt pixel_width,
FT_UInt pixel_height )
{
FT_Error error = FT_Err_Ok;
FT_Driver driver;
FT_Driver_Class clazz;
FT_Size_Metrics* metrics = &face->size->metrics;
if ( !face || !face->size || !face->driver )
return FT_Err_Invalid_Face_Handle;
driver = face->driver;
clazz = driver->clazz;
/* default processing -- this can be overridden by the driver */
if ( pixel_width == 0 )
pixel_width = pixel_height;
else if ( pixel_height == 0 )
pixel_height = pixel_width;
if ( pixel_width < 1 )
pixel_width = 1;
if ( pixel_height < 1 )
pixel_height = 1;
metrics->x_ppem = (FT_UShort)pixel_width;
metrics->y_ppem = (FT_UShort)pixel_height;
if ( face->face_flags & FT_FACE_FLAG_SCALABLE )
{
metrics->x_scale = FT_DivFix( metrics->x_ppem << 6,
face->units_per_EM );
metrics->y_scale = FT_DivFix( metrics->y_ppem << 6,
face->units_per_EM );
ft_recompute_scaled_metrics( face, metrics );
}
if ( clazz->set_pixel_sizes )
error = clazz->set_pixel_sizes( face->size,
pixel_width,
pixel_height );
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Get_Kerning( FT_Face face,
FT_UInt left_glyph,
FT_UInt right_glyph,
FT_UInt kern_mode,
FT_Vector *akerning )
{
FT_Error error = FT_Err_Ok;
FT_Driver driver;
if ( !face )
return FT_Err_Invalid_Face_Handle;
if ( !akerning )
return FT_Err_Invalid_Argument;
driver = face->driver;
akerning->x = 0;
akerning->y = 0;
if ( driver->clazz->get_kerning )
{
error = driver->clazz->get_kerning( face,
left_glyph,
right_glyph,
akerning );
if ( !error )
{
if ( kern_mode != ft_kerning_unscaled )
{
akerning->x = FT_MulFix( akerning->x, face->size->metrics.x_scale );
akerning->y = FT_MulFix( akerning->y, face->size->metrics.y_scale );
if ( kern_mode != ft_kerning_unfitted )
{
akerning->x = ( akerning->x + 32 ) & -64;
akerning->y = ( akerning->y + 32 ) & -64;
}
}
}
}
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Select_Charmap( FT_Face face,
FT_Encoding encoding )
{
FT_CharMap* cur;
FT_CharMap* limit;
if ( !face )
return FT_Err_Invalid_Face_Handle;
cur = face->charmaps;
if ( !cur )
return FT_Err_Invalid_CharMap_Handle;
limit = cur + face->num_charmaps;
for ( ; cur < limit; cur++ )
{
if ( cur[0]->encoding == encoding )
{
face->charmap = cur[0];
return 0;
}
}
return FT_Err_Invalid_Argument;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Set_Charmap( FT_Face face,
FT_CharMap charmap )
{
FT_CharMap* cur;
FT_CharMap* limit;
if ( !face )
return FT_Err_Invalid_Face_Handle;
cur = face->charmaps;
if ( !cur )
return FT_Err_Invalid_CharMap_Handle;
limit = cur + face->num_charmaps;
for ( ; cur < limit; cur++ )
{
if ( cur[0] == charmap )
{
face->charmap = cur[0];
return 0;
}
}
return FT_Err_Invalid_Argument;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_UInt )
FT_Stream_Get_Char_Index( FT_Face face,
FT_ULong charcode )
{
FT_UInt result;
FT_Driver driver;
result = 0;
if ( face && face->charmap )
{
driver = face->driver;
result = driver->clazz->get_char_index( face->charmap, charcode );
}
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_ULong )
FT_Get_First_Char( FT_Face face,
FT_UInt *agindex )
{
FT_ULong result = 0;
FT_UInt gindex;
gindex = FT_Stream_Get_Char_Index( face, 0 );
if ( gindex == 0 )
result = FT_Get_Next_Char( face, 0, &gindex );
*agindex = gindex;
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_ULong )
FT_Get_Next_Char( FT_Face face,
FT_ULong charcode,
FT_UInt *agindex )
{
FT_ULong result = 0;
FT_UInt gindex = 0;
result = 0;
if ( face && face->charmap )
{
FT_Driver driver;
driver = face->driver;
result = driver->clazz->get_next_char( face->charmap, charcode, &gindex );
}
if ( agindex )
*agindex = gindex;
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_UInt )
FT_Get_Name_Index( FT_Face face,
FT_String* glyph_name )
{
FT_UInt result = 0;
if ( face && FT_HAS_GLYPH_NAMES( face ) )
{
/* now, lookup for glyph name */
FT_Driver driver = face->driver;
FT_Module_Class* clazz = FT_MODULE_CLASS( driver );
if ( clazz->get_interface )
{
FT_Name_Index_Requester requester;
requester = (FT_Name_Index_Requester)clazz->get_interface(
FT_MODULE( driver ), "name_index" );
if ( requester )
result = requester( face, glyph_name );
}
}
return result;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Get_Glyph_Name( FT_Face face,
FT_UInt glyph_index,
FT_Pointer buffer,
FT_UInt buffer_max )
{
FT_Error error = FT_Err_Invalid_Argument;
/* clean up buffer */
if ( buffer && buffer_max > 0 )
((FT_Byte*)buffer)[0] = 0;
if ( face &&
glyph_index < (FT_UInt)face->num_glyphs &&
FT_HAS_GLYPH_NAMES( face ) )
{
/* now, lookup for glyph name */
FT_Driver driver = face->driver;
FT_Module_Class* clazz = FT_MODULE_CLASS( driver );
if ( clazz->get_interface )
{
FT_Glyph_Name_Requester requester;
requester = (FT_Glyph_Name_Requester)clazz->get_interface(
FT_MODULE( driver ), "glyph_name" );
if ( requester )
error = requester( face, glyph_index, buffer, buffer_max );
}
}
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( const char* )
FT_Get_Postscript_Name( FT_Face face )
{
const char* result = NULL;
if ( !face )
goto Exit;
result = face->internal->postscript_name;
if ( !result )
{
/* now, lookup for glyph name */
FT_Driver driver = face->driver;
FT_Module_Class* clazz = FT_MODULE_CLASS( driver );
if ( clazz->get_interface )
{
FT_PSName_Requester requester;
requester = (FT_PSName_Requester)clazz->get_interface(
FT_MODULE( driver ), "postscript_name" );
if ( requester )
result = requester( face );
}
}
Exit:
return result;
}
/* documentation is in tttables.h */
FT_EXPORT_DEF( void* )
FT_Get_Sfnt_Table( FT_Face face,
FT_Sfnt_Tag tag )
{
void* table = 0;
FT_Get_Sfnt_Table_Func func;
FT_Driver driver;
if ( !face || !FT_IS_SFNT( face ) )
goto Exit;
driver = face->driver;
func = (FT_Get_Sfnt_Table_Func)driver->root.clazz->get_interface(
FT_MODULE( driver ), "get_sfnt" );
if ( func )
table = func( face, tag );
Exit:
return table;
}
FT_EXPORT_DEF( FT_Error )
FT_Activate_Size( FT_Size size )
{
FT_Face face;
if ( size == NULL )
return FT_Err_Bad_Argument;
face = size->face;
if ( face == NULL || face->driver == NULL )
return FT_Err_Bad_Argument;
/* we don't need anything more complex than that; all size objects */
/* are already listed by the face */
face->size = size;
return FT_Err_Ok;
}
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** ****/
/**** R E N D E R E R S ****/
/**** ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* lookup a renderer by glyph format in the library's list */
FT_BASE_DEF( FT_Renderer )
FT_Lookup_Renderer( FT_Library library,
FT_Glyph_Format format,
FT_ListNode* node )
{
FT_ListNode cur;
FT_Renderer result = 0;
if ( !library )
goto Exit;
cur = library->renderers.head;
if ( node )
{
if ( *node )
cur = (*node)->next;
*node = 0;
}
while ( cur )
{
FT_Renderer renderer = FT_RENDERER( cur->data );
if ( renderer->glyph_format == format )
{
if ( node )
*node = cur;
result = renderer;
break;
}
cur = cur->next;
}
Exit:
return result;
}
static FT_Renderer
ft_lookup_glyph_renderer( FT_GlyphSlot slot )
{
FT_Face face = slot->face;
FT_Library library = FT_FACE_LIBRARY( face );
FT_Renderer result = library->cur_renderer;
if ( !result || result->glyph_format != slot->format )
result = FT_Lookup_Renderer( library, slot->format, 0 );
return result;
}
static void
ft_set_current_renderer( FT_Library library )
{
FT_Renderer renderer;
renderer = FT_Lookup_Renderer( library, ft_glyph_format_outline, 0 );
library->cur_renderer = renderer;
}
static FT_Error
ft_add_renderer( FT_Module module )
{
FT_Library library = module->library;
FT_Memory memory = library->memory;
FT_Error error;
FT_ListNode node;
if ( ALLOC( node, sizeof ( *node ) ) )
goto Exit;
{
FT_Renderer render = FT_RENDERER( module );
FT_Renderer_Class* clazz = (FT_Renderer_Class*)module->clazz;
render->clazz = clazz;
render->glyph_format = clazz->glyph_format;
/* allocate raster object if needed */
if ( clazz->glyph_format == ft_glyph_format_outline &&
clazz->raster_class->raster_new )
{
error = clazz->raster_class->raster_new( memory, &render->raster );
if ( error )
goto Fail;
render->raster_render = clazz->raster_class->raster_render;
render->render = clazz->render_glyph;
}
/* add to list */
node->data = module;
FT_List_Add( &library->renderers, node );
ft_set_current_renderer( library );
}
Fail:
if ( error )
FREE( node );
Exit:
return error;
}
static void
ft_renderer_remove( FT_Module module )
{
FT_Library library = module->library;
FT_Memory memory = library->memory;
FT_ListNode node;
node = FT_List_Find( &library->renderers, module );
if ( node )
{
FT_Renderer render = FT_RENDERER( module );
/* release raster object, if any */
if ( render->raster )
render->clazz->raster_class->raster_done( render->raster );
/* remove from list */
FT_List_Remove( &library->renderers, node );
FREE( node );
ft_set_current_renderer( library );
}
}
/* documentation is in ftrender.h */
FT_EXPORT_DEF( FT_Renderer )
FT_Get_Renderer( FT_Library library,
FT_Glyph_Format format )
{
/* test for valid `library' delayed to FT_Lookup_Renderer() */
return FT_Lookup_Renderer( library, format, 0 );
}
/* documentation is in ftrender.h */
FT_EXPORT_DEF( FT_Error )
FT_Set_Renderer( FT_Library library,
FT_Renderer renderer,
FT_UInt num_params,
FT_Parameter* parameters )
{
FT_ListNode node;
FT_Error error = FT_Err_Ok;
if ( !library )
return FT_Err_Invalid_Library_Handle;
if ( !renderer )
return FT_Err_Invalid_Argument;
node = FT_List_Find( &library->renderers, renderer );
if ( !node )
{
error = FT_Err_Invalid_Argument;
goto Exit;
}
FT_List_Up( &library->renderers, node );
if ( renderer->glyph_format == ft_glyph_format_outline )
library->cur_renderer = renderer;
if ( num_params > 0 )
{
FTRenderer_setMode set_mode = renderer->clazz->set_mode;
for ( ; num_params > 0; num_params-- )
{
error = set_mode( renderer, parameters->tag, parameters->data );
if ( error )
break;
}
}
Exit:
return error;
}
FT_EXPORT_DEF( FT_Error )
FT_Render_Glyph_Internal( FT_Library library,
FT_GlyphSlot slot,
FT_UInt render_mode )
{
FT_Error error = FT_Err_Ok;
FT_Renderer renderer;
/* if it is already a bitmap, no need to do anything */
switch ( slot->format )
{
case ft_glyph_format_bitmap: /* already a bitmap, don't do anything */
break;
default:
{
FT_ListNode node = 0;
FT_Bool update = 0;
/* small shortcut for the very common case */
if ( slot->format == ft_glyph_format_outline )
{
renderer = library->cur_renderer;
node = library->renderers.head;
}
else
renderer = FT_Lookup_Renderer( library, slot->format, &node );
error = FT_Err_Unimplemented_Feature;
while ( renderer )
{
error = renderer->render( renderer, slot, render_mode, NULL );
if ( !error ||
FT_ERROR_BASE( error ) != FT_Err_Cannot_Render_Glyph )
break;
/* FT_Err_Cannot_Render_Glyph is returned if the render mode */
/* is unsupported by the current renderer for this glyph image */
/* format. */
/* now, look for another renderer that supports the same */
/* format. */
renderer = FT_Lookup_Renderer( library, slot->format, &node );
update = 1;
}
/* if we changed the current renderer for the glyph image format */
/* we need to select it as the next current one */
if ( !error && update && renderer )
FT_Set_Renderer( library, renderer, 0, 0 );
}
}
return error;
}
/* documentation is in freetype.h */
FT_EXPORT_DEF( FT_Error )
FT_Render_Glyph( FT_GlyphSlot slot,
FT_UInt render_mode )
{
FT_Library library;
if ( !slot )
return FT_Err_Invalid_Argument;
library = FT_FACE_LIBRARY( slot->face );
return FT_Render_Glyph_Internal( library, slot, render_mode );
}
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** ****/
/**** M O D U L E S ****/
/**** ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* */
/* <Function> */
/* ft_module_destroy */
/* */
/* <Description> */
/* Destroys a given module object. For drivers, this also destroys */
/* all child faces. */
/* */
/* <InOut> */
/* module :: A handle to the target driver object. */
/* */
/* <Note> */
/* The driver _must_ be LOCKED! */
/* */
static void
ft_module_destroy( FT_Module module )
{
FT_Memory memory = module->memory;
FT_Module_Class* clazz = module->clazz;
FT_Library library = module->library;
/* finalize client-data - before anything else */
if ( module->generic.finalizer )
module->generic.finalizer( module );
if ( library && library->auto_hinter == module )
library->auto_hinter = 0;
/* if the module is a renderer */
if ( FT_MODULE_IS_RENDERER( module ) )
ft_renderer_remove( module );
/* if the module is a font driver, add some steps */
if ( FT_MODULE_IS_DRIVER( module ) )
ft_driver_destroy( FT_DRIVER( module ) );
/* finalize the module object */
if ( clazz->module_done )
clazz->module_done( module );
/* discard it */
FREE( module );
}
/* documentation is in ftmodule.h */
FT_EXPORT_DEF( FT_Error )
FT_Add_Module( FT_Library library,
const FT_Module_Class* clazz )
{
FT_Error error;
FT_Memory memory;
FT_Module module;
FT_UInt nn;
#define FREETYPE_VER_FIXED ( ( (FT_Long)FREETYPE_MAJOR << 16 ) | \
FREETYPE_MINOR )
if ( !library )
return FT_Err_Invalid_Library_Handle;
if ( !clazz )
return FT_Err_Invalid_Argument;
/* check freetype version */
if ( clazz->module_requires > FREETYPE_VER_FIXED )
return FT_Err_Invalid_Version;
/* look for a module with the same name in the library's table */
for ( nn = 0; nn < library->num_modules; nn++ )
{
module = library->modules[nn];
if ( strcmp( module->clazz->module_name, clazz->module_name ) == 0 )
{
/* this installed module has the same name, compare their versions */
if ( clazz->module_version <= module->clazz->module_version )
return FT_Err_Lower_Module_Version;
/* remove the module from our list, then exit the loop to replace */
/* it by our new version.. */
FT_Remove_Module( library, module );
break;
}
}
memory = library->memory;
error = FT_Err_Ok;
if ( library->num_modules >= FT_MAX_MODULES )
{
error = FT_Err_Too_Many_Drivers;
goto Exit;
}
/* allocate module object */
if ( ALLOC( module,clazz->module_size ) )
goto Exit;
/* base initialization */
module->library = library;
module->memory = memory;
module->clazz = (FT_Module_Class*)clazz;
/* check whether the module is a renderer - this must be performed */
/* before the normal module initialization */
if ( FT_MODULE_IS_RENDERER( module ) )
{
/* add to the renderers list */
error = ft_add_renderer( module );
if ( error )
goto Fail;
}
/* is the module a auto-hinter? */
if ( FT_MODULE_IS_HINTER( module ) )
library->auto_hinter = module;
/* if the module is a font driver */
if ( FT_MODULE_IS_DRIVER( module ) )
{
/* allocate glyph loader if needed */
FT_Driver driver = FT_DRIVER( module );
driver->clazz = (FT_Driver_Class)module->clazz;
if ( FT_DRIVER_USES_OUTLINES( driver ) )
{
error = FT_GlyphLoader_New( memory, &driver->glyph_loader );
if ( error )
goto Fail;
}
}
if ( clazz->module_init )
{
error = clazz->module_init( module );
if ( error )
goto Fail;
}
/* add module to the library's table */
library->modules[library->num_modules++] = module;
Exit:
return error;
Fail:
if ( FT_MODULE_IS_DRIVER( module ) )
{
FT_Driver driver = FT_DRIVER( module );
if ( FT_DRIVER_USES_OUTLINES( driver ) )
FT_GlyphLoader_Done( driver->glyph_loader );
}
if ( FT_MODULE_IS_RENDERER( module ) )
{
FT_Renderer renderer = FT_RENDERER( module );
if ( renderer->raster )
renderer->clazz->raster_class->raster_done( renderer->raster );
}
FREE( module );
goto Exit;
}
/* documentation is in ftmodule.h */
FT_EXPORT_DEF( FT_Module )
FT_Get_Module( FT_Library library,
const char* module_name )
{
FT_Module result = 0;
FT_Module* cur;
FT_Module* limit;
if ( !library || !module_name )
return result;
cur = library->modules;
limit = cur + library->num_modules;
for ( ; cur < limit; cur++ )
if ( strcmp( cur[0]->clazz->module_name, module_name ) == 0 )
{
result = cur[0];
break;
}
return result;
}
/* documentation is in ftobjs.h */
FT_BASE_DEF( const void* )
FT_Get_Module_Interface( FT_Library library,
const char* mod_name )
{
FT_Module module;
/* test for valid `library' delayed to FT_Get_Module() */
module = FT_Get_Module( library, mod_name );
return module ? module->clazz->module_interface : 0;
}
/* documentation is in ftmodule.h */
FT_EXPORT_DEF( FT_Error )
FT_Remove_Module( FT_Library library,
FT_Module module )
{
/* try to find the module from the table, then remove it from there */
if ( !library )
return FT_Err_Invalid_Library_Handle;
if ( module )
{
FT_Module* cur = library->modules;
FT_Module* limit = cur + library->num_modules;
for ( ; cur < limit; cur++ )
{
if ( cur[0] == module )
{
/* remove it from the table */
library->num_modules--;
limit--;
while ( cur < limit )
{
cur[0] = cur[1];
cur++;
}
limit[0] = 0;
/* destroy the module */
ft_module_destroy( module );
return FT_Err_Ok;
}
}
}
return FT_Err_Invalid_Driver_Handle;
}
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** ****/
/**** L I B R A R Y ****/
/**** ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/*************************************************************************/
/* documentation is in ftmodule.h */
FT_EXPORT_DEF( FT_Error )
FT_New_Library( FT_Memory memory,
FT_Library *alibrary )
{
FT_Library library = 0;
FT_Error error;
if ( !memory )
return FT_Err_Invalid_Argument;
/* first of all, allocate the library object */
if ( ALLOC( library, sizeof ( *library ) ) )
return error;
library->memory = memory;
/* allocate the render pool */
library->raster_pool_size = FT_RENDER_POOL_SIZE;
if ( ALLOC( library->raster_pool, FT_RENDER_POOL_SIZE ) )
goto Fail;
/* That's ok now */
*alibrary = library;
return FT_Err_Ok;
Fail:
FREE( library );
return error;
}
/* documentation is in ftmodule.h */
FT_EXPORT_DEF( FT_Error )
FT_Done_Library( FT_Library library )
{
FT_Memory memory;
if ( !library )
return FT_Err_Invalid_Library_Handle;
memory = library->memory;
/* Discard client-data */
if ( library->generic.finalizer )
library->generic.finalizer( library );
/* Close all modules in the library */
#if 1
while ( library->num_modules > 0 )
FT_Remove_Module( library, library->modules[0] );
#else
{
FT_UInt n;
for ( n = 0; n < library->num_modules; n++ )
{
FT_Module module = library->modules[n];
if ( module )
{
ft_module_destroy( module );
library->modules[n] = 0;
}
}
}
#endif
/* Destroy raster objects */
FREE( library->raster_pool );
library->raster_pool_size = 0;
FREE( library );
return FT_Err_Ok;
}
/* documentation is in ftmodule.h */
FT_EXPORT_DEF( void )
FT_Set_Debug_Hook( FT_Library library,
FT_UInt hook_index,
FT_DebugHook_Func debug_hook )
{
if ( library && debug_hook &&
hook_index <
( sizeof ( library->debug_hooks ) / sizeof ( void* ) ) )
library->debug_hooks[hook_index] = debug_hook;
}
/* backwards compatibility API */
FT_BASE_DEF( void )
FT_Stream_OpenMemory( FT_Library library,
FT_Byte* base,
FT_ULong size,
FT_Stream stream )
{
return FT_Stream_New_Memory( library, base, size, stream );
}
FT_BASE_DEF( FT_Error )
FT_Stream_Seek( FT_Stream stream,
FT_ULong pos )
{
return FT_Stream_Seek( stream, pos );
}
FT_BASE_DEF( FT_Error )
FT_Stream_Skip( FT_Stream stream,
FT_Long distance )
{
return FT_Stream_Skip( stream, distance );
}
FT_BASE_DEF( FT_Error )
FT_Stream_Read( FT_Stream stream,
FT_Byte* buffer,
FT_ULong count )
{
return FT_Stream_Read( stream, buffer, count );
}
FT_BASE_DEF( FT_Error )
FT_Stream_Read_At( FT_Stream stream,
FT_ULong pos,
FT_Byte* buffer,
FT_ULong count )
{
return FT_Stream_ReadAt( stream, pos, buffer, count );
}
FT_BASE_DEF( FT_Error )
FT_Stream_Extract_Frame( FT_Stream stream,
FT_ULong count,
FT_Byte** pbytes )
{
return FT_Stream_Extract_Frame( stream, count, pbytes );
}
FT_BASE_DEF( void )
FT_Stream_Release_Frame( FT_Stream stream,
FT_Byte** pbytes )
{
FT_Stream_Release_Frame( stream, pbytes );
}
FT_BASE_DEF( FT_Error )
FT_Stream_Enter_Frame( FT_Stream stream,
FT_ULong count )
{
return FT_Stream_Enter_Frame( stream, count );
}
FT_BASE_DEF( void )
FT_Stream_Exit_Frame( FT_Stream stream )
{
FT_Stream_Exit_Frame( stream );
}
/* END */