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/****************************************************************************
*
* ftsvg.c
*
* The FreeType svg renderer interface (body).
*
* Copyright (C) 1996-2019 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 <ft2build.h>
#include FT_INTERNAL_DEBUG_H
#include FT_SERVICE_PROPERTIES_H
#include FT_SVG_RENDER_H
#include FT_BBOX_H
#include <stdio.h>
#include "ftsvg.h"
/* ft_svg_init */
static FT_Error
ft_svg_init( SVG_Renderer svg_module )
{
FT_Error error = FT_Err_Ok;
svg_module->loaded = FALSE;
return error;
}
static void
ft_svg_done( SVG_Renderer svg_module )
{
FT_Library library = svg_module->root.root.library;
if ( svg_module->loaded == TRUE )
svg_module->hooks.free_svg( library );
svg_module->loaded = FALSE;
}
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_BBox outline_bbox;
FT_Error error;
FT_ULong size_image_buffer;
SVG_RendererHooks hooks = svg_renderer->hooks;
if ( svg_renderer->loaded == FALSE )
{
error = hooks.init_svg( library );
svg_renderer->loaded = TRUE;
}
/* Let's calculate the bounding box in font units here */
error = FT_Outline_Get_BBox( &slot->outline, &outline_bbox );
if( error != FT_Err_Ok )
return error;
size_image_buffer = hooks.get_buffer_size( slot, outline_bbox );
FT_MEM_ALLOC( slot->bitmap.buffer, size_image_buffer );
if ( error )
return error;
return hooks.render_svg( slot, outline_bbox );
}
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, "init_svg_hook" ) )
renderer->hooks.init_svg = (SVG_Lib_Init_Func)value;
else if ( !ft_strcmp( property_name, "free_svg_hook" ) )
renderer->hooks.free_svg = (SVG_Lib_Free_Func)value;
else if ( !ft_strcmp( property_name, "render_svg_hook" ) )
renderer->hooks.render_svg = (SVG_Lib_Render_Func)value;
else if ( !ft_strcmp( property_name, "get_buffer_size_hook" ) )
renderer->hooks.get_buffer_size = (SVG_Lib_Get_Buffer_Size_Func)value;
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, "init_svg_hook" ) )
{
SVG_Lib_Init_Func* val = (SVG_Lib_Init_Func*)value;
*val = (SVG_Lib_Init_Func)renderer->hooks.init_svg;
}
else if ( !ft_strcmp( property_name, "free_svg_hook" ) )
{
SVG_Lib_Free_Func* val = (SVG_Lib_Free_Func*)value;
*val = (SVG_Lib_Free_Func)renderer->hooks.free_svg;
}
else if ( !ft_strcmp( property_name, "render_svg_hook" ) )
{
SVG_Lib_Render_Func* val = (SVG_Lib_Render_Func*)value;
*val = (SVG_Lib_Render_Func)renderer->hooks.render_svg;
}
else if ( !ft_strcmp( property_name, "get_buffer_size_hook" ) )
{
SVG_Lib_Get_Buffer_Size_Func* val;
val = (SVG_Lib_Get_Buffer_Size_Func*)value;
*val = (SVG_Lib_Get_Buffer_Size_Func)renderer->hooks.render_svg;
}
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;
result = ft_service_list_lookup( ft_svg_services, ft_svg_interface );
if ( result )
return result;
return 0;
}
FT_DEFINE_RENDERER(
ft_svg_renderer_class,
FT_MODULE_RENDERER,
sizeof( SVG_RendererRec ),
"ot-svg",
0x10000L,
0x20000L,
NULL, /* module specific interface */
(FT_Module_Constructor)ft_svg_init, /* module_init */
(FT_Module_Destructor)ft_svg_done, /* module_done */
ft_svg_get_interface, /* get_interface */
FT_GLYPH_FORMAT_SVG,
(FT_Renderer_RenderFunc)ft_svg_render,
NULL,
NULL,
NULL,
NULL
)
|
