126 lines
3.3 KiB
C
126 lines
3.3 KiB
C
/****************************************************************************
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*
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* ftsvg.c
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*
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* The FreeType svg renderer interface (body).
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*
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* Copyright (C) 1996-2019 by
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* David Turner, Robert Wilhelm, Werner Lemberg and Moazin Khatti.
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*
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* This file is part of the FreeType project, and may only be used,
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* modified, and distributed under the terms of the FreeType project
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* license, LICENSE.TXT. By continuing to use, modify, or distribute
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* this file you indicate that you have read the license and
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* understand and accept it fully.
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*
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*/
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#include <ft2build.h>
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#include FT_SVG_RENDER_H
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#include FT_BBOX_H
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#include <stdio.h>
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#include "ftsvg.h"
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/* ft_svg_init */
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static FT_Error
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ft_svg_init( SVG_Renderer svg_module )
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{
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FT_Error error = FT_Err_Ok;
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svg_module->loaded = FALSE;
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return error;
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}
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static void
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ft_svg_done( SVG_Renderer svg_module )
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{
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FT_Library library = svg_module->root.root.library;
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if ( svg_module->loaded == TRUE )
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svg_module->hooks.free_svg( library );
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svg_module->loaded = FALSE;
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}
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static FT_Error
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ft_svg_render( FT_Renderer renderer,
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FT_GlyphSlot slot,
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FT_Render_Mode mode,
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const FT_Vector* origin )
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{
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SVG_Renderer svg_renderer = (SVG_Renderer)renderer;
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FT_Library library = renderer->root.library;
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FT_Memory memory = library->memory;
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FT_BBox outline_bbox;
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FT_Error error;
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FT_ULong size_image_buffer;
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SVG_RendererHooks hooks = svg_renderer->hooks;
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if ( svg_renderer->loaded == FALSE )
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{
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error = hooks.init_svg( library );
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svg_renderer->loaded = TRUE;
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}
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/* Let's calculate the bounding box in font units here */
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error = FT_Outline_Get_BBox( &slot->outline, &outline_bbox );
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if( error != FT_Err_Ok )
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return error;
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size_image_buffer = hooks.get_buffer_size( slot, outline_bbox );
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FT_MEM_ALLOC( slot->bitmap.buffer, size_image_buffer );
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if ( error )
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return error;
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return hooks.render_svg( slot, outline_bbox );
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}
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static FT_Error
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ft_svg_set_hooks( FT_Module module,
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SVG_Lib_Init_Func init_svg,
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SVG_Lib_Free_Func free_svg,
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SVG_Lib_Render_Func render_svg,
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SVG_Lib_Get_Buffer_Size_Func get_buffer_size )
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{
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SVG_Renderer renderer;
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renderer = (SVG_Renderer)module;
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renderer->hooks.init_svg = init_svg;
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renderer->hooks.free_svg = free_svg;
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renderer->hooks.render_svg = render_svg;
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renderer->hooks.get_buffer_size = get_buffer_size;
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return FT_Err_Ok;
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}
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static const SVG_Renderer_Interface svg_renderer_interface =
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{
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(SVG_Set_Hooks_Func)ft_svg_set_hooks
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};
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FT_DEFINE_RENDERER(
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ft_svg_renderer_class,
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FT_MODULE_RENDERER,
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sizeof( SVG_RendererRec ),
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"ot-svg",
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0x10000L,
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0x20000L,
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(const void*)&svg_renderer_interface, /* module specific interface */
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(FT_Module_Constructor)ft_svg_init, /* module_init */
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(FT_Module_Destructor)ft_svg_done, /* module_done */
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NULL,
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FT_GLYPH_FORMAT_SVG,
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(FT_Renderer_RenderFunc)ft_svg_render,
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NULL,
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NULL,
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NULL,
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NULL
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)
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