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VER-2-0-4-PATCH
Werner Lemberg 25 years ago
parent f697866ec2
commit 0db8d1ab84
5 changed files with 289 additions and 172 deletions
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  1. 1
      src/base/ftbbox.c
  2. 1
      src/base/ftdebug.h
  3. 43
      src/base/ftdriver.h
  4. 209
      src/base/ftextend.c
  5. 207
      src/base/ftextend.h

1
src/base/ftbbox.c
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@ -15,7 +15,6 @@
/* */
/***************************************************************************/
/*************************************************************************/
/* */
/* This component has a _single_ role: to compute exact outline bounding */

1
src/base/ftdebug.h
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@ -15,7 +15,6 @@
/* */
/***************************************************************************/
/*************************************************************************/
/* */
/* This component contains various macros and functions used to ease the */

43
src/base/ftdriver.h
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@ -42,7 +42,7 @@
/* A driver method used to create a new driver object for a given */
/* format. */
/* */
/* <Input> */
/* <InOut> */
/* driver :: A handle to the `new' driver object. The fields */
/* `library', `system', and `lock' are already set when the */
/* base layer calls this method. */
@ -64,7 +64,7 @@
/* this call, and that this function should NOT destroy the driver */
/* object. */
/* */
/* <Input> */
/* <InOut> */
/* driver :: A handle to target driver object. */
/* */
/* <Return> */
@ -72,7 +72,6 @@
/* */
typedef FT_Error (*FTDriver_doneDriver)( FT_Driver driver );
/*************************************************************************/
/* */
@ -88,10 +87,12 @@
/* `postscript names' interface which can be used to retrieve the */
/* PostScript name of a given glyph index). */
/* */
/* <Input> */
/* <InOut> */
/* driver :: A handle to a driver object. */
/* interface :: A string designing the interface. Examples */
/* are `sfnt', `post_names', `charmaps', etc. */
/* */
/* <Input> */
/* interface :: A string designing the interface. Examples are */
/* `sfnt', `post_names', `charmaps', etc. */
/* */
/* <Return> */
/* A typeless pointer to the extension's interface (normally a table */
@ -140,10 +141,14 @@
/* A driver method used to initialize a new face object. The object */
/* must be created by the caller. */
/* */
/* <Input> */
/* <InOut> */
/* stream :: The input stream. */
/* */
/* <Input> */
/* typeface_index :: The face index in the font resource. Used to */
/* access individual faces in collections. */
/* */
/* <Output> */
/* face :: A handle to the new target face. */
/* */
/* <Return> */
@ -174,7 +179,7 @@
/* function does NOT destroy the object, that is the responsibility */
/* of the caller. */
/* */
/* <Input> */
/* <InOut> */
/* face :: A handle to the target face object. */
/* */
/* <Return> */
@ -242,7 +247,7 @@
/* A driver method used to initialize a new size object. The object */
/* must be created by the caller. */
/* */
/* <Input> */
/* <InOut> */
/* size :: A handle to the new size object. */
/* */
/* <Return> */
@ -264,8 +269,10 @@
/* A driver method used to reset a size's character sizes (horizontal */
/* and vertical) expressed in fractional points. */
/* */
/* <Input> */
/* <InOut> */
/* size :: A handle to the target size object. */
/* */
/* <Input> */
/* char_width :: The character width expressed in 26.6 */
/* fractional points. */
/* char_height :: The character height expressed in 26.6 */
@ -296,8 +303,10 @@
/* A driver method used to reset a size's character sizes (horizontal */
/* and vertical) expressed in integer pixels. */
/* */
/* <Input> */
/* <InOut> */
/* size :: A handle to the target size object. */
/* */
/* <Input> */
/* pixel_width :: The character width expressed in 26.6 fractional */
/* pixels. */
/* pixel_height :: The character height expressed in 26.6 fractional */
@ -307,7 +316,7 @@
/* FreeType error code. 0 means success. */
/* */
/* <Note> */
/* This function should work with all kinds of `Size' objects, either */
/* This function should work with all kinds of `size' objects, either */
/* fixed or scalable ones. */
/* */
typedef FT_Error (*FTDriver_setPixelSizes)( FT_Size size,
@ -325,7 +334,7 @@
/* does NOT destroy the object; this is the responsibility of the */
/* caller. */
/* */
/* <Input> */
/* <InOut> */
/* size :: A handle to the target size object. */
/* */
typedef void (*FTDriver_doneSize)( FT_Size size );
@ -356,7 +365,7 @@
/* container where a single glyph can be loaded, either in outline or */
/* bitmap format. */
/* */
/* <Input> */
/* <InOut> */
/* slot :: A handle to the new glyph slot object. */
/* */
/* <Return> */
@ -374,7 +383,7 @@
/* A driver method used to finalize a given glyph slot. The object */
/* is not destroyed by this function. */
/* */
/* <Input> */
/* <InOut> */
/* slot :: A handle to the new glyph slot object. */
/* */
typedef void (*FTDriver_doneGlyphSlot)( FT_GlyphSlot slot );
@ -388,11 +397,13 @@
/* <Description> */
/* A driver method used to load a glyph within a given glyph slot. */
/* */
/* <Input> */
/* <InOut> */
/* slot :: A handle to target slot object where the glyph will */
/* be loaded. */
/* size :: A handle to the source face size at which the glyph */
/* must be scaled/loaded. */
/* */
/* <Input> */
/* glyph_index :: The index of the glyph in the font file. */
/* load_flags :: A flag indicating what to load for this glyph. The */
/* FTLOAD_??? constants can be used to control the */

209
src/base/ftextend.c
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@ -1,34 +1,38 @@
/*******************************************************************
*
* ftextend.h 2.0
*
* Extensions Implementation
*
* Copyright 1996-1999 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.
*
* This is an updated version of the extension component, now
* located in the main library's source directory. It allows
* the dynamic registration/use of various face object extensions
* through a simple API.
*
******************************************************************/
#include "ftextend.h"
#include "ftobjs.h"
/***************************************************************************/
/* */
/* ftextend.h */
/* */
/* FreeType extensions implementation (body). */
/* */
/* Copyright 1996-2000 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. */
/* */
/***************************************************************************/
/*************************************************************************/
/* */
/* This is an updated version of the extension component, now located */
/* in the main library's source directory. It allows the dynamic */
/* registration/use of various face object extensions through a simple */
/* API. */
/* */
/*************************************************************************/
#include <ftextend.h>
#include <ftobjs.h>
/* required by the tracing mode */
#undef FT_COMPONENT
#define FT_COMPONENT trace_extend
#define FT_COMPONENT trace_extend
typedef struct FT_Extension_Registry_
typedef struct FT_Extension_Registry_
{
FT_Int num_extensions;
FT_Long cur_offset;
@ -37,17 +41,30 @@
} FT_Extension_Registry;
/* Initialize the extension component */
/*************************************************************************/
/* */
/* <Function> */
/* FT_Init_Extensions */
/* */
/* <Description> */
/* Initializes the extension component. */
/* */
/* <InOut> */
/* driver :: A handle to the driver object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
LOCAL_FUNC
FT_Error FT_Init_Extensions( FT_Driver driver )
{
FT_Error error;
FT_Error error;
FT_Memory memory;
FT_Extension_Registry* registry;
memory = driver->library->memory;
if ( ALLOC( registry, sizeof (*registry) ) )
if ( ALLOC( registry, sizeof ( *registry ) ) )
return error;
registry->num_extensions = 0;
@ -58,36 +75,64 @@
}
/* Finalize the extension component */
/*************************************************************************/
/* */
/* <Function> */
/* FT_Done_Extensions */
/* */
/* <Description> */
/* Finalizes the extension component. */
/* */
/* <InOut> */
/* driver :: A handle to the driver object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
LOCAL_FUNC
FT_Error FT_Done_Extensions( FT_Driver driver )
{
FT_Memory memory = driver->memory;
FREE( driver->extensions );
return FT_Err_Ok;
}
/* Register a new extension */
/*************************************************************************/
/* */
/* <Function> */
/* FT_Register_Extension */
/* */
/* <Description> */
/* Registers a new extension. */
/* */
/* <InOut> */
/* driver :: A handle to the driver object. */
/* class :: A pointer to a class describing the extension. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
EXPORT_FUNC
FT_Error FT_Register_Extension( FT_Driver driver,
FT_Extension_Class* clazz )
FT_Extension_Class* class )
{
FT_Extension_Registry* registry;
registry = (FT_Extension_Registry*)driver->extensions;
if (registry)
if ( registry )
{
FT_Int n = registry->num_extensions;
FT_Extension_Class* cur = registry->classes + n;
if ( n >= FT_MAX_EXTENSIONS )
return FT_Err_Too_Many_Extensions;
*cur = *clazz;
*cur = *class;
cur->offset = registry->cur_offset;
@ -99,20 +144,40 @@
}
/* Query an extension block by extension_ID */
/*************************************************************************/
/* */
/* <Function> */
/* FT_Get_Extension */
/* */
/* <Description> */
/* Queries an extension block by an extension ID string. */
/* */
/* <Input> */
/* face :: A handle to the face object. */
/* extension_id :: An ID string identifying the extension. */
/* */
/* <Output> */
/* extension_interface :: A generic pointer, usually pointing to a */
/* table of functions implementing the */
/* extension interface. */
/* */
/* <Return> */
/* A pointer to the extension block. */
/* */
EXPORT_FUNC
void* FT_Get_Extension( FT_Face face,
const char* extension_id,
void* *extension_interface )
{
FT_Extension_Registry* registry;
registry = (FT_Extension_Registry*)face->driver->extensions;
if (registry && face->extensions)
if ( registry && face->extensions )
{
FT_Extension_Class* cur = registry->classes;
FT_Extension_Class* limit = cur + registry->num_extensions;
for ( ; cur < limit; cur++ )
if ( strcmp( cur->id, extension_id ) == 0 )
@ -123,55 +188,92 @@
}
/* could not find the extension id */
*extension_interface = 0;
return 0;
}
/* Destroy all extensions within a face object. Called by the */
/* face object destructor. */
/*************************************************************************/
/* */
/* <Function> */
/* FT_Destroy_Extensions */
/* */
/* <Description> */
/* Destroys all extensions within a face object. */
/* */
/* <InOut> */
/* face :: A handle to the face object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
/* <Note> */
/* Called by the face object destructor. */
/* */
LOCAL_FUNC
FT_Error FT_Destroy_Extensions( FT_Face face )
{
FT_Extension_Registry* registry;
FT_Memory memory;
registry = (FT_Extension_Registry*)face->driver->extensions;
if (registry && face->extensions)
if ( registry && face->extensions )
{
FT_Extension_Class* cur = registry->classes;
FT_Extension_Class* limit = cur + registry->num_extensions;
for ( ; cur < limit; cur++ )
{
char* ext = (char*)face->extensions + cur->offset;
if (cur->finalize)
if ( cur->finalize )
cur->finalize( ext, face );
}
memory = face->driver->memory;
FREE( face->extensions );
}
return FT_Err_Ok;
}
/* Create an extension within a face object. Called by the */
/* face object constructor. */
/*************************************************************************/
/* */
/* <Function> */
/* FT_Create_Extensions */
/* */
/* <Description> */
/* Creates an extension object within a face object for all */
/* registered extensions. */
/* */
/* <InOut> */
/* face :: A handle to the face object. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
/* <Note> */
/* Called by the face object constructor. */
/* */
LOCAL_FUNC
FT_Error FT_Create_Extensions( FT_Face face )
{
FT_Extension_Registry* registry;
FT_Memory memory;
FT_Error error;
face->extensions = 0;
/* load extensions registry, exit succesfully if none is there */
/* load extensions registry, exit successfully if none is there */
registry = (FT_Extension_Registry*)face->driver->extensions;
if (!registry) return FT_Err_Ok;
if ( !registry )
return FT_Err_Ok;
memory = face->driver->memory;
if ( ALLOC( face->extensions, registry->cur_offset ) )
@ -180,18 +282,21 @@
{
FT_Extension_Class* cur = registry->classes;
FT_Extension_Class* limit = cur + registry->num_extensions;
for ( ; cur < limit; cur++ )
{
char* ext = (char*)face->extensions + cur->offset;
if (cur->init)
if ( cur->init )
{
error = cur->init( ext, face );
if (error) break;
if ( error )
break;
}
}
}
return error;
}

207
src/base/ftextend.h
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@ -1,117 +1,114 @@
/*******************************************************************
*
* ftextend.h 2.0
*
* Extensions Interface.
*
* Copyright 1996-1999 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.
*
******************************************************************/
/***************************************************************************/
/* */
/* ftextend.h */
/* */
/* FreeType extensions implementation (specification). */
/* */
/* Copyright 1996-2000 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. */
/* */
/***************************************************************************/
#ifndef FTEXTEND_H
#define FTEXTEND_H
#include "ftconfig.h"
#include "ftobjs.h"
#include <ftconfig.h>
#include <ftobjs.h>
#ifdef __cplusplus
extern "C" {
#endif
/* The extensions don't need to be integrated at compile time into */
/* the engine, only at link time. */
/*****************************************************************
*
* <FuncType>
* FT_Extension_Initializer
*
* <Description>
* Each new face object can have several extensions associated
* to it at creation time. This function is used to initialize
* a given extension data for a given face.
*
* <Input>
* ext :: a typeless pointer to the extension data.
* face :: handle to the source face object the extension is
* associated with
*
* <Return>
* Error condition. 0 means success
*
* <Note>
* In case of error, the initializer should not destroy the
* extension data, as the finalizer will get called later
* by the function's caller..
*
*****************************************************************/
/*************************************************************************/
/* */
/* The extensions don't need to be integrated at compile time into the */
/* engine, only at link time. */
/* */
/*************************************************************************/
/*************************************************************************/
/* */
/* <FuncType> */
/* FT_Extension_Initializer */
/* */
/* <Description> */
/* Each new face object can have several extensions associated with */
/* it at creation time. This function is used to initialize given */
/* extension data for a given face. */
/* */
/* <InOut> */
/* ext :: A typeless pointer to the extension data. */
/* face :: A handle to the source face object the extension is */
/* associated with. */
/* */
/* <Return> */
/* FreeType error code. 0 means success. */
/* */
/* <Note> */
/* In case of error, the initializer should not destroy the extension */
/* data, as the finalizer will get called later by the function's */
/* caller. */
/* */
typedef FT_Error (*FT_Extension_Initializer)( void* ext,
FT_Face face );
/*****************************************************************
*
* <FuncType>
* FT_Extension_Finalizer
*
* <Description>
* Each new face object can have several extensions associated
* to it at creation time. This function is used to finalize
* a given extension data for a given face. This occurs before
* the face object itself is finalized.
*
* <Input>
* ext :: a typeless pointer to the extension data.
* face :: handle to the source face object the extension is
* associated with
*
*****************************************************************/
typedef void (*FT_Extension_Finalizer)( void* ext, FT_Face face );
/*****************************************************************
*
* <Struct>
* FT_Extension_Class
*
* <Description>
* A simple structure used to describe a given extension to
* the FreeType base layer. An FT_Extension_Class is used as
* a parameter for FT_Register_Extension.
*
* <Fields>
* id :: the extension's id. This is a normal C string
* that is used to uniquely reference the extension's
* interface.
*
* size :: the size in bytes of the extension data that must
* be associated with each face object.
*
* init :: a pointer to the extension data's initializer
* finalize :: a pointer to the extension data's finalizer
*
* inteface :: this pointer can be anything, but should usually
* point to a table of function pointers which implement
* the extension's interface.
*
* offset :: this field is set and used within the base layer
* and should be set to 0 when registering an
* extension through FT_Register_Extension. It contains
* an offset within the face's extension block for the
* current extension's data.
*
*****************************************************************/
typedef struct FT_Extension_Class_
/*************************************************************************/
/* */
/* <FuncType> */
/* FT_Extension_Finalizer */
/* */
/* <Description> */
/* Each new face object can have several extensions associated with */
/* it at creation time. This function is used to finalize given */
/* extension data for a given face; it occurs before the face object */
/* itself is finalized. */
/* */
/* <InOut> */
/* ext :: A typeless pointer to the extension data. */
/* face :: A handle to the source face object the extension is */
/* associated with. */
/* */
typedef void (*FT_Extension_Finalizer)( void* ext,
FT_Face face );
/*************************************************************************/
/* */
/* <Struct> */
/* FT_Extension_Class */
/* */
/* <Description> */
/* A simple structure used to describe a given extension to the */
/* FreeType base layer. An FT_Extension_Class is used as a parameter */
/* for FT_Register_Extension(). */
/* */
/* <Fields> */
/* id :: The extension's ID. This is a normal C string that */
/* is used to uniquely reference the extension's */
/* interface. */
/* size :: The size in bytes of the extension data that must be */
/* associated with each face object. */
/* init :: A pointer to the extension data's initializer. */
/* finalize :: A pointer to the extension data's finalizer. */
/* interface :: This pointer can be anything, but should usually */
/* point to a table of function pointers which implement */
/* the extension's interface. */
/* */
/* offset :: This field is set and used within the base layer and */
/* should be set to 0 when registering an extension */
/* through FT_Register_Extension(). It contains an */
/* offset within the face's extension block for the */
/* current extension's data. */
/* */
typedef struct FT_Extension_Class_
{
const char* id;
FT_ULong size;
@ -130,6 +127,8 @@
#ifdef FT_CONFIG_OPTION_EXTEND_ENGINE
/* Initialize the extension component */
LOCAL_DEF
FT_Error FT_Init_Extensions( FT_Library library );
@ -147,13 +146,17 @@
/* face object destructor. */
LOCAL_DEF
FT_Error FT_Destroy_Extensions( FT_Face face );
#endif
/* Returns an extension's data & inteface according to its ID */
/* Returns an extension's data & interface according to its ID */
EXPORT_DEF
void* FT_Get_Extension( FT_Face face,
const char* extension_id,
void* *extension_interface );
#ifdef __cplusplus
}
#endif

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