forked from minhngoc25a/freetype2
* 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
2 years ago
committed by
Werner Lemberg
parent
97c09a803e
commit
0bf49bd229
@ -0,0 +1,46 @@
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/****************************************************************************
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*
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* svginterface.h
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*
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* Interface of ot-svg module (specification only).
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*
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* Copyright (C) 2022 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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#ifndef SVGINTERFACE_H_
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#define SVGINTERFACE_H_
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#include <ft2build.h>
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#include <freetype/otsvg.h>
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FT_BEGIN_HEADER
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typedef FT_Error
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(*Preset_Bitmap_Func)( FT_Module module,
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FT_GlyphSlot slot,
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FT_Bool cache );
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typedef struct SVG_Interface_
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{
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Preset_Bitmap_Func preset_slot;
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} SVG_Interface;
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typedef SVG_Interface* SVG_Service;
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FT_END_HEADER
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#endif /* SVGINTERFACE_H_ */
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/* END */
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@ -0,0 +1,332 @@
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/****************************************************************************
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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) 2022 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 <freetype/internal/ftdebug.h>
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#include <freetype/internal/ftserv.h>
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#include <freetype/internal/services/svprop.h>
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#include <freetype/otsvg.h>
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#include <freetype/internal/svginterface.h>
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#include <freetype/ftbbox.h>
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#include "ftsvg.h"
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#include "svgtypes.h"
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/**************************************************************************
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*
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* The macro FT_COMPONENT is used in trace mode. It is an implicit
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* parameter of the FT_TRACE() and FT_ERROR() macros, usued to print/log
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* messages during execution.
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*/
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#undef FT_COMPONENT
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#define FT_COMPONENT otsvg
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#ifdef FT_CONFIG_OPTION_SVG
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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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svg_module->hooks_set = 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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if ( svg_module->loaded == TRUE &&
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svg_module->hooks_set == TRUE )
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svg_module->hooks.free_svg( &svg_module->state );
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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_preset_slot( FT_Module module,
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FT_GlyphSlot slot,
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FT_Bool cache )
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{
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SVG_Renderer svg_renderer = (SVG_Renderer)module;
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SVG_RendererHooks hooks = svg_renderer->hooks;
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if ( svg_renderer->hooks_set == FALSE )
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{
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FT_TRACE1(( "Hooks are NOT set. Can't render OT-SVG glyphs\n" ));
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return FT_THROW( Missing_SVG_Hooks );
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}
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if ( svg_renderer->loaded == FALSE )
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{
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FT_TRACE3(( "ft_svg_preset_slot: first presetting call,"
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" calling init hook\n" ));
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hooks.init_svg( &svg_renderer->state );
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svg_renderer->loaded = TRUE;
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}
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return hooks.preset_slot( slot, cache, &svg_renderer->state );
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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_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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FT_UNUSED( mode );
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FT_UNUSED( origin );
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if ( mode != FT_RENDER_MODE_NORMAL )
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return FT_THROW( Bad_Argument );
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if ( svg_renderer->hooks_set == FALSE )
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{
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FT_TRACE1(( "Hooks are NOT set. Can't render OT-SVG glyphs\n" ));
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return FT_THROW( Missing_SVG_Hooks );
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}
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if ( svg_renderer->loaded == FALSE )
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{
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FT_TRACE3(( "ft_svg_render: first rendering, calling init hook\n" ));
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error = hooks.init_svg( &svg_renderer->state );
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svg_renderer->loaded = TRUE;
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}
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ft_svg_preset_slot( (FT_Module)renderer, slot, TRUE );
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size_image_buffer = (FT_ULong)slot->bitmap.pitch * slot->bitmap.rows;
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/* No `FT_QALLOC` here since we need a clean, empty canvas */
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/* to start with. */
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if ( FT_ALLOC( slot->bitmap.buffer, size_image_buffer ) )
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return error;
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error = hooks.render_svg( slot, &svg_renderer->state );
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if ( error )
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FT_FREE( slot->bitmap.buffer );
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else
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slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
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return error;
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}
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static const SVG_Interface svg_interface =
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{
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(Preset_Bitmap_Func)ft_svg_preset_slot
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};
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static FT_Error
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ft_svg_property_set( FT_Module module,
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const char* property_name,
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const void* value,
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FT_Bool value_is_string )
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{
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FT_Error error = FT_Err_Ok;
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SVG_Renderer renderer = (SVG_Renderer)module;
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if ( !ft_strcmp( property_name, "svg_hooks" ) )
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{
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SVG_RendererHooks* hooks;
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if ( value_is_string == TRUE )
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return FT_THROW( Invalid_Argument );
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hooks = (SVG_RendererHooks*)value;
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renderer->hooks = *hooks;
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renderer->hooks_set = TRUE;
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}
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else
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error = FT_THROW( Missing_Property );
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return error;
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}
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static FT_Error
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ft_svg_property_get( FT_Module module,
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const char* property_name,
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const void* value )
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{
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FT_Error error = FT_Err_Ok;
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SVG_Renderer renderer = (SVG_Renderer)module;
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if ( !ft_strcmp( property_name, "svg_hooks" ) )
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{
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SVG_RendererHooks* hooks = (SVG_RendererHooks*)value;
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*hooks = renderer->hooks;
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}
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else
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error = FT_THROW( Missing_Property );
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return error;
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}
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FT_DEFINE_SERVICE_PROPERTIESREC(
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ft_svg_service_properties,
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(FT_Properties_SetFunc)ft_svg_property_set, /* set_property */
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(FT_Properties_GetFunc)ft_svg_property_get /* get_property */
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)
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FT_DEFINE_SERVICEDESCREC1(
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ft_svg_services,
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FT_SERVICE_ID_PROPERTIES, &ft_svg_service_properties )
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FT_CALLBACK_DEF( FT_Module_Interface )
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ft_svg_get_interface( FT_Module module,
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const char* ft_svg_interface )
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{
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FT_Module_Interface result;
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FT_UNUSED( module );
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result = ft_service_list_lookup( ft_svg_services, ft_svg_interface );
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if ( result )
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return result;
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return 0;
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}
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static FT_Error
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ft_svg_transform( FT_Renderer renderer,
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FT_GlyphSlot slot,
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const FT_Matrix* _matrix,
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const FT_Vector* _delta )
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{
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FT_SVG_Document doc = (FT_SVG_Document)slot->other;
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FT_Matrix* matrix = (FT_Matrix*)_matrix;
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FT_Vector* delta = (FT_Vector*)_delta;
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FT_Matrix tmp_matrix;
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FT_Vector tmp_delta;
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FT_Matrix a, b;
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FT_Pos x, y;
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FT_UNUSED( renderer );
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if ( !matrix )
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{
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tmp_matrix.xx = 0x10000;
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tmp_matrix.xy = 0;
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tmp_matrix.yx = 0;
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tmp_matrix.yy = 0x10000;
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matrix = &tmp_matrix;
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}
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if ( !delta )
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{
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tmp_delta.x = 0;
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tmp_delta.y = 0;
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delta = &tmp_delta;
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}
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a = doc->transform;
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b = *matrix;
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FT_Matrix_Multiply( &b, &a );
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x = ADD_LONG( ADD_LONG( FT_MulFix( matrix->xx, doc->delta.x ),
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FT_MulFix( matrix->xy, doc->delta.y ) ),
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delta->x );
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y = ADD_LONG( ADD_LONG( FT_MulFix( matrix->yx, doc->delta.x ),
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FT_MulFix( matrix->yy, doc->delta.y ) ),
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delta->y );
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doc->delta.x = x;
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doc->delta.y = y;
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doc->transform = a;
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return FT_Err_Ok;
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}
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#endif /* FT_CONFIG_OPTION_SVG */
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#ifdef FT_CONFIG_OPTION_SVG
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#define PUT_SVG_MODULE( a ) a
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#define SVG_GLYPH_FORMAT FT_GLYPH_FORMAT_SVG
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#else
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#define PUT_SVG_MODULE( a ) NULL
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#define SVG_GLYPH_FORMAT FT_GLYPH_FORMAT_NONE
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#endif
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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*)PUT_SVG_MODULE( &svg_interface ), /* module specific interface */
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(FT_Module_Constructor)PUT_SVG_MODULE( ft_svg_init ), /* module_init */
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(FT_Module_Destructor)PUT_SVG_MODULE( ft_svg_done ), /* module_done */
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PUT_SVG_MODULE( ft_svg_get_interface ), /* get_interface */
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SVG_GLYPH_FORMAT,
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(FT_Renderer_RenderFunc) PUT_SVG_MODULE( ft_svg_render ), /* render_glyph */
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(FT_Renderer_TransformFunc)PUT_SVG_MODULE( ft_svg_transform ), /* transform_glyph */
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NULL, /* get_glyph_cbox */
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NULL, /* set_mode */
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NULL /* raster_class */
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)
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/* END */
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@ -0,0 +1,35 @@
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/****************************************************************************
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*
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* ftsvg.h
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*
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* The FreeType SVG renderer interface (specification).
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*
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* Copyright (C) 2022 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,
|
||||
* 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.
|
||||
*
|
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*/
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#ifndef FTSVG_H_
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#define FTSVG_H_
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#include <ft2build.h>
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#include <freetype/ftrender.h>
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#include <freetype/internal/ftobjs.h>
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FT_BEGIN_HEADER
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FT_DECLARE_RENDERER( ft_svg_renderer_class )
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FT_END_HEADER
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#endif /* FTSVG_H_ */
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/* END */
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@ -0,0 +1,23 @@
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#
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# FreeType 2 SVG renderer module definition
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#
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|
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# Copyright (C) 2022 by
|
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# 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
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define SVG_MODULE
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$(OPEN_DRIVER) FT_Renderer_Class, ft_svg_renderer_class $(CLOSE_DRIVER)
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$(ECHO_DRIVER)ot-svg $(ECHO_DRIVER_DESC)OT-SVG glyph renderer module$(ECHO_DRIVER_DONE)
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||||
endef
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||||
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||||
# EOF
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@ -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
|
||||
@ -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 */
|
||||
@ -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 */
|
||||
Loading…
Reference in new issue