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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_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_set_hooks( FT_Module module,
SVG_Lib_Init_Func init_svg,
SVG_Lib_Free_Func free_svg,
SVG_Lib_Render_Func render_svg,
SVG_Lib_Get_Buffer_Size_Func get_buffer_size )
{
SVG_Renderer renderer;
renderer = (SVG_Renderer)module;
renderer->hooks.init_svg = init_svg;
renderer->hooks.free_svg = free_svg;
renderer->hooks.render_svg = render_svg;
renderer->hooks.get_buffer_size = get_buffer_size;
return FT_Err_Ok;
}
static const SVG_Renderer_Interface svg_renderer_interface =
{
(SVG_Set_Hooks_Func)ft_svg_set_hooks
};
FT_DEFINE_RENDERER(
ft_svg_renderer_class,
FT_MODULE_RENDERER,
sizeof( SVG_RendererRec ),
"ot-svg",
0x10000L,
0x20000L,
(const void*)&svg_renderer_interface, /* module specific interface */
(FT_Module_Constructor)ft_svg_init, /* module_init */
(FT_Module_Destructor)ft_svg_done, /* module_done */
NULL,
FT_GLYPH_FORMAT_SVG,
(FT_Renderer_RenderFunc)ft_svg_render,
NULL,
NULL,
NULL,
NULL
)
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