Commit d248d8d681354d06b85ce17d79bb74ecd0a9d5bb
2002-02-22T18:29:12
adding API-specific source
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diff --git a/src/base/ftapi.c b/src/base/ftapi.c
new file mode 100644
index 0000000..b95c42a
--- /dev/null
+++ b/src/base/ftapi.c
@@ -0,0 +1,2089 @@
+/***************************************************************************/
+/* */
+/* 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_Interface* 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_Interface*)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_New_Memory_Stream( 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_Seek_Stream( FT_Stream stream,
+ FT_ULong pos )
+ {
+ return FT_Stream_Seek( stream, pos );
+ }
+
+
+ FT_BASE_DEF( FT_Error )
+ FT_Skip_Stream( FT_Stream stream,
+ FT_Long distance )
+ {
+ return FT_Stream_Skip( stream, distance );
+ }
+
+
+ FT_BASE_DEF( FT_Error )
+ FT_Read_Stream( FT_Stream stream,
+ FT_Byte* buffer,
+ FT_ULong count )
+ {
+ return FT_Stream_Read( stream, buffer, count );
+ }
+
+
+ FT_BASE_DEF( FT_Error )
+ FT_Read_Stream_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_Extract_Frame( FT_Stream stream,
+ FT_ULong count,
+ FT_Byte** pbytes )
+ {
+ return FT_Stream_Extract_Frame( stream, count, pbytes );
+ }
+
+
+ FT_BASE_DEF( void )
+ FT_Release_Frame( FT_Stream stream,
+ FT_Byte** pbytes )
+ {
+ FT_Stream_Release_Frame( stream, pbytes );
+ }
+
+ FT_BASE_DEF( FT_Error )
+ FT_Access_Frame( FT_Stream stream,
+ FT_ULong count )
+ {
+ return FT_Stream_Enter_Frame( stream, count );
+ }
+
+
+ FT_BASE_DEF( void )
+ FT_Forget_Frame( FT_Stream stream )
+ {
+ FT_Stream_Exit_Frame( stream );
+ }
+
+
+/* END */