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Add 'svg' module for OT-SVG rendering.

* CMakeLists.txt (BASE_SRCS): Add svg module file.
* meson.build (ft2_public_headers): Add `otsvg.h`.

* modules.cfg (RASTER_MODULES): Add `svg` module.

* builds/meson/parse_modules_cfg.py: Add svg module.

* include/freetype/config/ftmodule.h: Add `ft_svg_renderer_class`.
* include/freetype/fterrdef.h: Add `Invalid_SVG_Document` and
`Missing_SVG_Hooks` error codes.
* include/freetype/internal/fttrace.h: Add tracing for `otsvg`.
* include/freetype/internal/svginterface.h: New file.  It adds an interface
to enable the presetting hook from the `base` module.
* include/freetype/otsvg.h (SVG_Lib_Init_Func, SVG_Lib_Free_Func,
SVG_Lib_Render_Func, SVG_Lib_Preset_Slot_Func): New hooks for SVG rendering.
(SVG_RendererHooks): New structure to access them.

* src/base/ftobjs.c: Include `svginterface.h`.
(ft_glyphslot_preset_bitmap): Add code for presetting the slot for SVG
glyphs.
(ft_add_renderer): Updated.

* src/svg/*: New files.
fix-sdf-squared-distances
Moazin Khatti 5 months ago
committed by Werner Lemberg
parent
commit
0bf49bd229
  1. 1
      CMakeLists.txt
  2. 1
      builds/meson/parse_modules_cfg.py
  3. 1
      include/freetype/config/ftmodule.h
  4. 4
      include/freetype/fterrdef.h
  5. 3
      include/freetype/internal/fttrace.h
  6. 46
      include/freetype/internal/svginterface.h
  7. 211
      include/freetype/otsvg.h
  8. 1
      meson.build
  9. 3
      modules.cfg
  10. 21
      src/base/ftobjs.c
  11. 6
      src/sfnt/ttsvg.c
  12. 332
      src/svg/ftsvg.c
  13. 35
      src/svg/ftsvg.h
  14. 23
      src/svg/module.mk
  15. 70
      src/svg/rules.mk
  16. 24
      src/svg/svg.c
  17. 42
      src/svg/svgtypes.h

1
CMakeLists.txt

@ -400,6 +400,7 @@ set(BASE_SRCS
src/sdf/sdf.c
src/sfnt/sfnt.c
src/smooth/smooth.c
src/svg/svg.c
src/truetype/truetype.c
src/type1/type1.c
src/type42/type42.c

1
builds/meson/parse_modules_cfg.py

@ -87,6 +87,7 @@ def generate_ftmodule(lists):
name = {
"raster": "ft_raster1",
"smooth": "ft_smooth",
"svg": "ft_svg",
}.get(module)
result += (
"FT_USE_MODULE( FT_Renderer_Class, %s_renderer_class )\n" % name

1
include/freetype/config/ftmodule.h

@ -28,5 +28,6 @@ FT_USE_MODULE( FT_Renderer_Class, ft_smooth_renderer_class )
FT_USE_MODULE( FT_Renderer_Class, ft_raster1_renderer_class )
FT_USE_MODULE( FT_Renderer_Class, ft_sdf_renderer_class )
FT_USE_MODULE( FT_Renderer_Class, ft_bitmap_sdf_renderer_class )
FT_USE_MODULE( FT_Renderer_Class, ft_svg_renderer_class )
/* EOF */

4
include/freetype/fterrdef.h

@ -101,6 +101,8 @@
"too many hints" )
FT_ERRORDEF_( Invalid_Pixel_Size, 0x17,
"invalid pixel size" )
FT_ERRORDEF_( Invalid_SVG_Document, 0x18,
"invalid SVG document" )
/* handle errors */
@ -234,6 +236,8 @@
"found FDEF or IDEF opcode in glyf bytecode" )
FT_ERRORDEF_( Missing_Bitmap, 0x9D,
"missing bitmap in strike" )
FT_ERRORDEF_( Missing_SVG_Hooks, 0x9E,
"SVG hooks have not been set" )
/* CFF, CID, and Type 1 errors */

3
include/freetype/internal/fttrace.h

@ -49,6 +49,9 @@ FT_TRACE_DEF( synth ) /* bold/slant synthesizer (ftsynth.c) */
FT_TRACE_DEF( raster ) /* monochrome rasterizer (ftraster.c) */
FT_TRACE_DEF( smooth ) /* anti-aliasing raster (ftgrays.c) */
/* ot-svg module */
FT_TRACE_DEF( otsvg ) /* OT-SVG renderer (ftsvg.c) */
/* cache sub-system */
FT_TRACE_DEF( cache ) /* cache sub-system (ftcache.c, etc.) */

46
include/freetype/internal/svginterface.h

@ -0,0 +1,46 @@
/****************************************************************************
*
* svginterface.h
*
* Interface of ot-svg module (specification only).
*
* Copyright (C) 2022 by
* David Turner, Robert Wilhelm, Werner Lemberg, and Moazin Khatti.
*
* 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 SVGINTERFACE_H_
#define SVGINTERFACE_H_
#include <ft2build.h>
#include <freetype/otsvg.h>
FT_BEGIN_HEADER
typedef FT_Error
(*Preset_Bitmap_Func)( FT_Module module,
FT_GlyphSlot slot,
FT_Bool cache );
typedef struct SVG_Interface_
{
Preset_Bitmap_Func preset_slot;
} SVG_Interface;
typedef SVG_Interface* SVG_Service;
FT_END_HEADER
#endif /* SVGINTERFACE_H_ */
/* END */

211
include/freetype/otsvg.h

@ -30,6 +30,217 @@
FT_BEGIN_HEADER
/**************************************************************************
*
* @functype:
* SVG_Lib_Init_Func
*
* @description:
* A callback that is called when the first OT-SVG glyph is rendered in
* the lifetime of an @FT_Library object. In a typical implementation,
* one would want to allocate a structure and point the `data_pointer`
* to it and perform any library initializations that might be needed.
*
* For more information on the implementation, see our standard hooks
* based on Librsvg in the 'FreeType Demo Programs' repository.
*
* @inout:
* data_pointer ::
* The SVG rendering module stores a pointer variable that can be used
* by clients to store any data that needs to be shared across
* different hooks. `data_pointer` is essentially a pointer to that
* pointer such that it can be written to as well as read from.
*
* @return:
* FreeType error code. 0 means success.
*
* @since:
* 2.12
*/
typedef FT_Error
(*SVG_Lib_Init_Func)( FT_Pointer *data_pointer );
/**************************************************************************
*
* @functype:
* SVG_Lib_Free_Func
*
* @description:
* A callback that is called when the `ot-svg` module is being freed.
* It is only called if the init hook was called earlier. This means
* that neither the init nor the free hook is called if no OT-SVG glyph
* is rendered.
*
* In a typical implementation, one would want to free any state
* structure that was allocated in the init hook and perform any
* library-related closure that might be needed.
*
* For more information on the implementation, see our standard hooks
* based on Librsvg in the 'FreeType Demo Programs' repository.
*
* @inout:
* data_pointer ::
* The SVG rendering module stores a pointer variable that can be used
* by clients to store any data that needs to be shared across
* different hooks. `data_pointer` is essentially a pointer to that
* pointer such that it can be written to as well as read from.
*
* @since:
* 2.12
*/
typedef void
(*SVG_Lib_Free_Func)( FT_Pointer *data_pointer );
/**************************************************************************
*
* @functype:
* SVG_Lib_Render_Func
*
* @description:
* A callback that is called to render an OT-SVG glyph. This callback
* hook is called right after the preset hook @SVG_Lib_Preset_SlotFunc
* has been called with `cache` set to `TRUE`. The data necessary to
* render is available through the handle @FT_SVG_Document, which is set
* in the `other` field of @FT_GlyphSlotRec.
*
* The render hook is expected to render the SVG glyph to the bitmap
* buffer that is allocated already at `slot->bitmap.buffer`. It also
* sets the `num_grays` value as well as `slot->format`.
*
* For more information on the implementation, see our standard hooks
* based on Librsvg in the 'FreeType Demo Programs' repository.
*
* @input:
* slot ::
* The slot to render.
*
* @inout:
* data_pointer ::
* The SVG rendering module stores a pointer variable that can be used
* by clients to store any data that needs to be shared across
* different hooks. `data_pointer` is essentially a pointer to that
* pointer such that it can be written to as well as read from.
*
* @return:
* FreeType error code. 0 means success.
*
* @since:
* 2.12
*/
typedef FT_Error
(*SVG_Lib_Render_Func)( FT_GlyphSlot slot,
FT_Pointer *data_pointer );
/**************************************************************************
*
* @functype:
* SVG_Lib_Preset_Slot_Func
*
* @description:
* A callback that is called to preset the glyph slot. It is called from
* two places.
*
* 1. When `FT_Load_Glyph` needs to preset the glyph slot.
* 2. Right before the `svg` module calls the render callback hook.
*
* When it is the former, the argument `cache` is set to `FALSE`. When
* it is the latter, the argument `cache` is set to `TRUE`. This
* distinction has been made because many calculations that are necessary
* for presetting a glyph slot are the same needed later for the render
* callback hook. Thus, if `cache` is `TRUE`, the hook can _cache_ those
* calculations in a memory block referenced by the state pointer.
*
* This hook is expected to preset the slot by setting parameters such as
* `bitmap_left`, `bitmap_top`, `width`, `rows`, `pitch`, and
* `pixel_mode`. It is also expected to set all the metrics for the slot
* including the vertical advance if it is not already set. Typically,
* fonts have horizontal advances but not vertical ones. If those are
* available, they had already been set, otherwise they have to be
* estimated and set manually. The hook must take into account the
* transformations that have been set, and translate the transformation
* matrices into the SVG coordinate system, as the original matrix is
* intended for the TTF/CFF coordinate system.
*
* For more information on the implementation, see our standard hooks
* based on Librsvg in the 'FreeType Demo Programs' repository.
*
* @input:
* slot ::
* The glyph slot that has the SVG document loaded.
*
* cache ::
* See description.
*
* @inout:
* data_pointer ::
* The SVG rendering module stores a pointer variable that can be used
* by clients to store any data that needs to be shared across
* different hooks. `data_pointer` is essentially a pointer to that
* pointer such that it can be written to as well as read from.
*
* @return:
* FreeType error code. 0 means success.
*
* @since:
* 2.12
*/
typedef FT_Error
(*SVG_Lib_Preset_Slot_Func)( FT_GlyphSlot slot,
FT_Bool cache,
FT_Pointer *state );
/**************************************************************************
*
* @struct:
* SVG_RendererHooks
*
* @description:
* A structure that stores the four hooks needed to render OT-SVG glyphs
* properly. The structure is publicly used to set the hooks via driver
* properties.
*
* The behavior of each hook is described in its documentation. One
* thing to note is that the preset hook and the render hook often need
* to do the same operations; therefore, it's better to cache the
* intermediate data in a state structure to avoid calculating it twice.
* For example, in the preset hook one can draw the glyph on a recorder
* surface and later create a bitmap surface from it in the render hook.
*
* For more information on the implementation, see our standard hooks
* based on Librsvg in the 'FreeType Demo Programs' repository.
*
* @fields:
* init_svg ::
* The initialization hook.
*
* free_svg ::
* The cleanup hook.
*
* render_hook ::
* The render hook.
*
* preset_slot ::
* The preset hook.
*
* @since:
* 2.12
*/
typedef struct SVG_RendererHooks_
{
SVG_Lib_Init_Func init_svg;
SVG_Lib_Free_Func free_svg;
SVG_Lib_Render_Func render_svg;
SVG_Lib_Preset_Slot_Func preset_slot;
} SVG_RendererHooks;
/**************************************************************************
*
* @struct:

1
meson.build

@ -172,6 +172,7 @@ ft2_public_headers = files([
'include/freetype/fttrigon.h',
'include/freetype/fttypes.h',
'include/freetype/ftwinfnt.h',
'include/freetype/otsvg.h',
'include/freetype/t1tables.h',
'include/freetype/ttnameid.h',
'include/freetype/tttables.h',

3
modules.cfg

@ -99,6 +99,9 @@ RASTER_MODULES += smooth
# Monochrome rasterizer.
RASTER_MODULES += raster
# OT-SVG.
RASTER_MODULES += svg
# Signed distance field rasterizer.
RASTER_MODULES += sdf

21
src/base/ftobjs.c

@ -28,6 +28,7 @@
#include <freetype/internal/ftstream.h>
#include <freetype/internal/sfnt.h> /* for SFNT_Load_Table_Func */
#include <freetype/internal/psaux.h> /* for PS_Driver */
#include <freetype/internal/svginterface.h>
#include <freetype/tttables.h>
#include <freetype/tttags.h>
@ -386,7 +387,18 @@
FT_Pos width, height, pitch;
if ( slot->format != FT_GLYPH_FORMAT_OUTLINE )
if ( slot->format == FT_GLYPH_FORMAT_SVG )
{
FT_Module module;
SVG_Service svg_service;
module = FT_Get_Module( slot->library, "ot-svg" );
svg_service = (SVG_Service)module->clazz->module_interface;
return (FT_Bool)svg_service->preset_slot( module, slot, FALSE );
}
else if ( slot->format != FT_GLYPH_FORMAT_OUTLINE )
return 1;
if ( origin )
@ -4539,7 +4551,7 @@
render->glyph_format = clazz->glyph_format;
/* allocate raster object if needed */
if ( clazz->raster_class->raster_new )
if ( clazz->raster_class && clazz->raster_class->raster_new )
{
error = clazz->raster_class->raster_new( memory, &render->raster );
if ( error )
@ -4549,6 +4561,11 @@
render->render = clazz->render_glyph;
}
#ifdef FT_CONFIG_OPTION_SVG
if ( clazz->glyph_format == FT_GLYPH_FORMAT_SVG )
render->render = clazz->render_glyph;
#endif
/* add to list */
node->data = module;
FT_List_Add( &library->renderers, node );

6
src/sfnt/ttsvg.c

@ -299,7 +299,7 @@
if ( ( doc_list[0] == 0x1F ) && ( doc_list[1] == 0x8B )
&& ( doc_list[2] == 0x08 ) )
{
#ifdef FT_CONFIG_OPTION_SYSTEM_ZLIB
#ifdef FT_CONFIG_OPTION_USE_ZLIB
FT_ULong uncomp_size;
FT_Byte* uncomp_buffer;
@ -339,12 +339,12 @@
doc_list = uncomp_buffer;
doc_length = uncomp_size;
#else /* !FT_CONFIG_OPTION_SYSTEM_ZLIB */
#else /* !FT_CONFIG_OPTION_USE_ZLIB */
error = FT_THROW( Unimplemented_Feature );
goto Exit;
#endif /* !FT_CONFIG_OPTION_SYSTEM_ZLIB */
#endif /* !FT_CONFIG_OPTION_USE_ZLIB */
}
svg_document->svg_document = doc_list;

332
src/svg/ftsvg.c

@ -0,0 +1,332 @@
/****************************************************************************
*
* ftsvg.c
*
* The FreeType SVG renderer interface (body).
*
* Copyright (C) 2022 by
* David Turner, Robert Wilhelm, Werner Lemberg, and Moazin Khatti.
*
* 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 <freetype/internal/ftdebug.h>
#include <freetype/internal/ftserv.h>
#include <freetype/internal/services/svprop.h>
#include <freetype/otsvg.h>
#include <freetype/internal/svginterface.h>
#include <freetype/ftbbox.h>
#include "ftsvg.h"
#include "svgtypes.h"
/**************************************************************************
*
* The macro FT_COMPONENT is used in trace mode. It is an implicit
* parameter of the FT_TRACE() and FT_ERROR() macros, usued to print/log
* messages during execution.
*/
#undef FT_COMPONENT
#define FT_COMPONENT otsvg
#ifdef FT_CONFIG_OPTION_SVG
/* ft_svg_init */
static FT_Error
ft_svg_init( SVG_Renderer svg_module )
{
FT_Error error = FT_Err_Ok;
svg_module->loaded = FALSE;
svg_module->hooks_set = FALSE;
return error;
}
static void
ft_svg_done( SVG_Renderer svg_module )
{
if ( svg_module->loaded == TRUE &&
svg_module->hooks_set == TRUE )
svg_module->hooks.free_svg( &svg_module->state );
svg_module->loaded = FALSE;
}
static FT_Error
ft_svg_preset_slot( FT_Module module,
FT_GlyphSlot slot,
FT_Bool cache )
{
SVG_Renderer svg_renderer = (SVG_Renderer)module;
SVG_RendererHooks hooks = svg_renderer->hooks;
if ( svg_renderer->hooks_set == FALSE )
{
FT_TRACE1(( "Hooks are NOT set. Can't render OT-SVG glyphs\n" ));
return FT_THROW( Missing_SVG_Hooks );
}
if ( svg_renderer->loaded == FALSE )
{
FT_TRACE3(( "ft_svg_preset_slot: first presetting call,"
" calling init hook\n" ));
hooks.init_svg( &svg_renderer->state );
svg_renderer->loaded = TRUE;
}
return hooks.preset_slot( slot, cache, &svg_renderer->state );
}
static FT_Error
ft_svg_render( FT_Renderer renderer,
FT_GlyphSlot slot,
FT_Render_Mode mode,
const FT_Vector* origin )
{
SVG_Renderer svg_renderer = (SVG_Renderer)renderer;
FT_Library library = renderer->root.library;
FT_Memory memory = library->memory;
FT_Error error;
FT_ULong size_image_buffer;
SVG_RendererHooks hooks = svg_renderer->hooks;
FT_UNUSED( mode );
FT_UNUSED( origin );
if ( mode != FT_RENDER_MODE_NORMAL )
return FT_THROW( Bad_Argument );
if ( svg_renderer->hooks_set == FALSE )
{
FT_TRACE1(( "Hooks are NOT set. Can't render OT-SVG glyphs\n" ));
return FT_THROW( Missing_SVG_Hooks );
}
if ( svg_renderer->loaded == FALSE )
{
FT_TRACE3(( "ft_svg_render: first rendering, calling init hook\n" ));
error = hooks.init_svg( &svg_renderer->state );
svg_renderer->loaded = TRUE;
}
ft_svg_preset_slot( (FT_Module)renderer, slot, TRUE );
size_image_buffer = (FT_ULong)slot->bitmap.pitch * slot->bitmap.rows;
/* No `FT_QALLOC` here since we need a clean, empty canvas */
/* to start with. */
if ( FT_ALLOC( slot->bitmap.buffer, size_image_buffer ) )
return error;
error = hooks.render_svg( slot, &svg_renderer->state );
if ( error )
FT_FREE( slot->bitmap.buffer );
else
slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
return error;
}
static const SVG_Interface svg_interface =
{
(Preset_Bitmap_Func)ft_svg_preset_slot
};
static FT_Error
ft_svg_property_set( FT_Module module,
const char* property_name,
const void* value,
FT_Bool value_is_string )
{
FT_Error error = FT_Err_Ok;
SVG_Renderer renderer = (SVG_Renderer)module;
if ( !ft_strcmp( property_name, "svg_hooks" ) )
{
SVG_RendererHooks* hooks;
if ( value_is_string == TRUE )
return FT_THROW( Invalid_Argument );
hooks = (SVG_RendererHooks*)value;
renderer->hooks = *hooks;
renderer->hooks_set = TRUE;
}
else
error = FT_THROW( Missing_Property );
return error;
}
static FT_Error
ft_svg_property_get( FT_Module module,
const char* property_name,
const void* value )
{
FT_Error error = FT_Err_Ok;
SVG_Renderer renderer = (SVG_Renderer)module;
if ( !ft_strcmp( property_name, "svg_hooks" ) )
{
SVG_RendererHooks* hooks = (SVG_RendererHooks*)value;
*hooks = renderer->hooks;
}
else
error = FT_THROW( Missing_Property );
return error;
}
FT_DEFINE_SERVICE_PROPERTIESREC(
ft_svg_service_properties,
(FT_Properties_SetFunc)ft_svg_property_set, /* set_property */
(FT_Properties_GetFunc)ft_svg_property_get /* get_property */
)
FT_DEFINE_SERVICEDESCREC1(
ft_svg_services,
FT_SERVICE_ID_PROPERTIES, &ft_svg_service_properties )
FT_CALLBACK_DEF( FT_Module_Interface )
ft_svg_get_interface( FT_Module module,
const char* ft_svg_interface )
{
FT_Module_Interface result;
FT_UNUSED( module );
result = ft_service_list_lookup( ft_svg_services, ft_svg_interface );
if ( result )
return result;
return 0;
}
static FT_Error
ft_svg_transform( FT_Renderer renderer,
FT_GlyphSlot slot,
const FT_Matrix* _matrix,
const FT_Vector* _delta )
{
FT_SVG_Document doc = (FT_SVG_Document)slot->other;
FT_Matrix* matrix = (FT_Matrix*)_matrix;
FT_Vector* delta = (FT_Vector*)_delta;
FT_Matrix tmp_matrix;
FT_Vector tmp_delta;
FT_Matrix a, b;
FT_Pos x, y;
FT_UNUSED( renderer );
if ( !matrix )
{
tmp_matrix.xx = 0x10000;
tmp_matrix.xy = 0;
tmp_matrix.yx = 0;
tmp_matrix.yy = 0x10000;
matrix = &tmp_matrix;
}
if ( !delta )
{
tmp_delta.x = 0;
tmp_delta.y = 0;
delta = &tmp_delta;
}
a = doc->transform;
b = *matrix;
FT_Matrix_Multiply( &b, &a );
x = ADD_LONG( ADD_LONG( FT_MulFix( matrix->xx, doc->delta.x ),
FT_MulFix( matrix->xy, doc->delta.y ) ),
delta->x );
y = ADD_LONG( ADD_LONG( FT_MulFix( matrix->yx, doc->delta.x ),
FT_MulFix( matrix->yy, doc->delta.y ) ),
delta->y );
doc->delta.x = x;
doc->delta.y = y;
doc->transform = a;
return FT_Err_Ok;
}
#endif /* FT_CONFIG_OPTION_SVG */
#ifdef FT_CONFIG_OPTION_SVG
#define PUT_SVG_MODULE( a ) a
#define SVG_GLYPH_FORMAT FT_GLYPH_FORMAT_SVG
#else
#define PUT_SVG_MODULE( a ) NULL
#define SVG_GLYPH_FORMAT FT_GLYPH_FORMAT_NONE
#endif
FT_DEFINE_RENDERER(
ft_svg_renderer_class,
FT_MODULE_RENDERER,
sizeof ( SVG_RendererRec ),
"ot-svg",
0x10000L,
0x20000L,
(const void*)PUT_SVG_MODULE( &svg_interface ), /* module specific interface */
(FT_Module_Constructor)PUT_SVG_MODULE( ft_svg_init ), /* module_init */
(FT_Module_Destructor)PUT_SVG_MODULE( ft_svg_done ), /* module_done */
PUT_SVG_MODULE( ft_svg_get_interface ), /* get_interface */
SVG_GLYPH_FORMAT,
(FT_Renderer_RenderFunc) PUT_SVG_MODULE( ft_svg_render ), /* render_glyph */
(FT_Renderer_TransformFunc)PUT_SVG_MODULE( ft_svg_transform ), /* transform_glyph */
NULL, /* get_glyph_cbox */
NULL, /* set_mode */
NULL /* raster_class */
)
/* END */

35
src/svg/ftsvg.h

@ -0,0 +1,35 @@
/****************************************************************************
*
* ftsvg.h
*
* The FreeType SVG renderer interface (specification).
*
* Copyright (C) 2022 by
* David Turner, Robert Wilhelm, Werner Lemberg, and Moazin Khatti.
*
* 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 FTSVG_H_
#define FTSVG_H_
#include <ft2build.h>
#include <freetype/ftrender.h>
#include <freetype/internal/ftobjs.h>
FT_BEGIN_HEADER
FT_DECLARE_RENDERER( ft_svg_renderer_class )
FT_END_HEADER
#endif /* FTSVG_H_ */
/* END */

23
src/svg/module.mk

@ -0,0 +1,23 @@
#
# FreeType 2 SVG renderer module definition
#
# Copyright (C) 2022 by
# David Turner, Robert Wilhelm, Werner Lemberg, and Moazin Khatti.
#
# 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.
FTMODULE_H_COMMANDS += SVG_MODULE
define SVG_MODULE
$(OPEN_DRIVER) FT_Renderer_Class, ft_svg_renderer_class $(CLOSE_DRIVER)
$(ECHO_DRIVER)ot-svg $(ECHO_DRIVER_DESC)OT-SVG glyph renderer module$(ECHO_DRIVER_DONE)
endef
# EOF

70
src/svg/rules.mk

@ -0,0 +1,70 @@
#
# FreeType 2 SVG renderer module build rules
#
# Copyright (C) 2022 by
# David Turner, Robert Wilhelm, Werner Lemberg, and Moazin Khatti.
#
# 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.
# SVG renderer driver directory
#
SVG_DIR := $(SRC_DIR)/svg
# compilation flags for the driver
#
SVG_COMPILE := $(CC) $(ANSIFLAGS) \
$I$(subst /,$(COMPILER_SEP),$(SVG_DIR)) \
$(INCLUDE_FLAGS) \
$(FT_CFLAGS)
# SVG renderer sources (i.e., C files)
#
SVG_DRV_SRC := $(SVG_DIR)/ftsvg.c
# SVG renderer headers
#
SVG_DRV_H := $(SVG_DIR)/ftsvg.h \
$(SVG_DIR)/svgtypes.h
# SVG renderer object(s)
#
# SVG_DRV_OBJ_M is used during `multi' builds.
# SVG_DRV_OBJ_S is used during `single' builds.
#
SVG_DRV_OBJ_M := $(SVG_DRV_SRC:$(SVG_DIR)/%.c=$(OBJ_DIR)/%.$O)
SVG_DRV_OBJ_S := $(OBJ_DIR)/svg.$O
# SVG renderer source file for single build
#
SVG_DRV_SRC_S := $(SVG_DIR)/svg.c
# SVG renderer - single object
#
$(SVG_DRV_OBJ_S): $(SVG_DRV_SRC_S) $(SVG_DRV_SRC) \
$(FREETYPE_H) $(SVG_DRV_H)
$(SVG_COMPILE) $T$(subst /,$(COMPILER_SEP),$@ $(SVG_DRV_SRC_S))
# SVG renderer - multiple objects
#
$(OBJ_DIR)/%.$O: $(SVG_DIR)/%.c $(FREETYPE_H) $(SVG_DRV_H)
$(SVG_COMPILE) $T$(subst /,$(COMPILER_SEP),$@ $<)
# update main driver object lists
#
DRV_OBJS_S += $(SVG_DRV_OBJ_S)
DRV_OBJS_M += $(SVG_DRV_OBJ_M)
# EOF

24
src/svg/svg.c

@ -0,0 +1,24 @@
/****************************************************************************
*
* svg.c
*
* FreeType SVG renderer module component (body only).
*
* Copyright (C) 2022 by
* David Turner, Robert Wilhelm, Werner Lemberg, and Moazin Khatti.
*
* 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.
*
*/
#define FT_MAKE_OPTION_SINGLE_OBJECT
#include "svgtypes.h"
#include "ftsvg.c"
/* END */

42
src/svg/svgtypes.h

@ -0,0 +1,42 @@
/****************************************************************************
*
* svgtypes.h
*
* The FreeType SVG renderer internal types (specification).
*
* Copyright (C) 2022 by
* David Turner, Robert Wilhelm, Werner Lemberg, and Moazin Khatti.
*
* 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 SVGTYPES_H_
#define SVGTYPES_H_
#include <ft2build.h>
#include <freetype/internal/ftobjs.h>
#include <freetype/ftrender.h>
#include <freetype/otsvg.h>
typedef struct SVG_RendererRec_
{
FT_RendererRec root; /* this inherits FT_RendererRec */
FT_Bool loaded;
FT_Bool hooks_set;
SVG_RendererHooks hooks; /* this holds hooks for SVG rendering */
FT_Pointer state; /* a place for hooks to store state, if needed */
} SVG_RendererRec;
typedef struct SVG_RendererRec_* SVG_Renderer;
#endif /* SVGTYPES_H_ */
/* EOF */
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