forked from minhngoc25a/freetype2
added the structure of new `sdf' module
This commit is contained in:
preversewharf45
anujverma
parent
986a340dd5
commit
185d07b0cd
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@ -347,6 +347,7 @@ set(BASE_SRCS
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src/pshinter/pshinter.c
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src/psnames/psnames.c
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src/raster/raster.c
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src/sdf/sdf.c
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src/sfnt/sfnt.c
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src/smooth/smooth.c
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src/truetype/truetype.c
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@ -0,0 +1,23 @@
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2020-06-18 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Added the structure of a new module to render
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signed distance fields.
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* src/sdf/sdf.c, src/sdf/ftsdfrend.c, src/sdf/ftsdf.c,
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src/sdf/ftsdfrend.h, src/sdf/ftsdf.h, src/sdf/ftsdferrs.h:
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Added files required by the `sdf' renderer module and added
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the basic structure and functions required.
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* src/sdf/rules.mk, src/sdf/module.mk: Added files required to
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build the `sdf' module using the default build system.
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* CMakeLists.txt (`BASE_SRCS'): Add `src/sdf/sdf.c' to the variable.
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* include/freetype/config/ftmodule.h: Added `sdf' module
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declaration so that the module can be added when not compiling
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with GNU make.
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* modules.cfg (RASTER_MODULES): Include `sdf' module to the default
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rasterizer module list.
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* include/freetype/ftmoderr.h: sdf module error define
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@ -26,5 +26,6 @@ FT_USE_MODULE( FT_Renderer_Class, ft_raster1_renderer_class )
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FT_USE_MODULE( FT_Module_Class, sfnt_module_class )
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FT_USE_MODULE( FT_Renderer_Class, ft_smooth_renderer_class )
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FT_USE_MODULE( FT_Driver_ClassRec, bdf_driver_class )
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FT_USE_MODULE( FT_Renderer_Class, ft_sdf_renderer_class )
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/* EOF */
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@ -171,6 +171,7 @@
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FT_MODERRDEF( Type42, 0x1400, "Type 42 module" )
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FT_MODERRDEF( Winfonts, 0x1500, "Windows FON/FNT module" )
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FT_MODERRDEF( GXvalid, 0x1600, "GX validation module" )
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FT_MODERRDEF( Sdf, 0x1700, "signed distance field raster module" )
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#ifdef FT_MODERR_END_LIST
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@ -99,6 +99,8 @@ RASTER_MODULES += raster
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# Anti-aliasing rasterizer.
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RASTER_MODULES += smooth
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# Signed distance field rasterizer.
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RASTER_MODULES += sdf
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####
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#### auxiliary modules
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@ -0,0 +1,73 @@
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#include <freetype/internal/ftobjs.h>
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#include <freetype/internal/ftdebug.h>
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#include "ftsdf.h"
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#include "ftsdferrs.h"
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static int
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sdf_raster_new( FT_Memory memory,
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FT_Raster* araster)
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{
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FT_Error error = FT_THROW( Unimplemented_Feature );
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FT_UNUSED( memory );
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FT_UNUSED( araster );
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return error;
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}
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static void
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sdf_raster_reset( FT_Raster raster,
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unsigned char* pool_base,
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unsigned long pool_size )
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{
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FT_UNUSED( raster );
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FT_UNUSED( pool_base );
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FT_UNUSED( pool_size );
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}
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static int
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sdf_raster_set_mode( FT_Raster raster,
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unsigned long mode,
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void* args )
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{
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FT_UNUSED( raster );
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FT_UNUSED( mode );
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FT_UNUSED( args );
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return 0;
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}
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static int
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sdf_raster_render( FT_Raster raster,
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const FT_Raster_Params* params )
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{
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FT_UNUSED( raster );
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FT_UNUSED( params );
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return 0;
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}
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static void
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sdf_raster_done( FT_Raster raster )
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{
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FT_UNUSED( raster );
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}
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FT_DEFINE_RASTER_FUNCS(
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ft_sdf_raster,
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FT_GLYPH_FORMAT_OUTLINE,
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(FT_Raster_New_Func) sdf_raster_new, /* raster_new */
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(FT_Raster_Reset_Func) sdf_raster_reset, /* raster_reset */
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(FT_Raster_Set_Mode_Func) sdf_raster_set_mode, /* raster_set_mode */
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(FT_Raster_Render_Func) sdf_raster_render, /* raster_render */
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(FT_Raster_Done_Func) sdf_raster_done /* raster_done */
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)
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/* END */
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@ -0,0 +1,17 @@
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#ifndef FTSDF_H_
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#define FTSDF_H_
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#include <ft2build.h>
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#include FT_CONFIG_CONFIG_H
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#include <freetype/ftimage.h>
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FT_BEGIN_HEADER
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FT_EXPORT_VAR( const FT_Raster_Funcs ) ft_sdf_raster;
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FT_END_HEADER
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#endif /* FTSDF_H_ */
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/* END */
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@ -0,0 +1,18 @@
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#ifndef FTSDFERRS_H_
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#define FTSDFERRS_H_
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#include <freetype/ftmoderr.h>
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#undef FTERRORS_H_
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#undef FT_ERR_PREFIX
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#define FT_ERR_PREFIX Sdf_Err_
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#define FT_ERR_BASE FT_Mod_Err_Sdf
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#include <freetype/fterrors.h>
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#endif /* FTSDFERRS_H_ */
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/* END */
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@ -0,0 +1,95 @@
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#include <freetype/internal/ftdebug.h>
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#include <freetype/internal/ftobjs.h>
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#include "ftsdfrend.h"
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#include "ftsdf.h"
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#include "ftsdferrs.h"
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static FT_Error
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ft_sdf_render( FT_Renderer render,
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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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FT_Error error = FT_THROW( Unimplemented_Feature );
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FT_UNUSED( render );
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FT_UNUSED( slot );
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FT_UNUSED( mode );
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FT_UNUSED( origin );
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return error;
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}
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static FT_Error
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ft_sdf_transform( FT_Renderer render,
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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_Error error = FT_THROW( Unimplemented_Feature );
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FT_UNUSED( render );
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FT_UNUSED( slot );
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FT_UNUSED( matrix );
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FT_UNUSED( delta );
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return error;
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}
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static void
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ft_sdf_get_cbox( FT_Renderer render,
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FT_GlyphSlot slot,
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FT_BBox* cbox )
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{
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FT_UNUSED( render );
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FT_UNUSED( slot );
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FT_UNUSED( cbox );
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}
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static FT_Error
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ft_sdf_set_mode( FT_Renderer render,
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FT_ULong mode_tag,
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FT_Pointer data )
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{
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FT_Error error = FT_THROW( Unimplemented_Feature );
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FT_UNUSED( render );
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FT_UNUSED( mode_tag );
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FT_UNUSED( data );
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return error;
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}
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FT_DEFINE_RENDERER(
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ft_sdf_renderer_class,
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FT_MODULE_RENDERER,
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sizeof( FT_RendererRec ),
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"sdf",
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0x10000L,
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0x20000L,
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NULL,
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(FT_Module_Constructor) NULL,
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(FT_Module_Destructor) NULL,
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(FT_Module_Requester) NULL,
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FT_GLYPH_FORMAT_OUTLINE,
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(FT_Renderer_RenderFunc) ft_sdf_render, /* render_glyph */
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(FT_Renderer_TransformFunc)ft_sdf_transform, /* transform_glyph */
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(FT_Renderer_GetCBoxFunc) ft_sdf_get_cbox, /* get_glyph_cbox */
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(FT_Renderer_SetModeFunc) ft_sdf_set_mode, /* set_mode */
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(FT_Raster_Funcs*)&ft_sdf_raster /* raster_class */
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)
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/* END */
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@ -0,0 +1,20 @@
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#ifndef FTSDFREND_H_
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#define FTSDFREND_H_
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#include <freetype/ftrender.h>
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FT_BEGIN_HEADER
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FT_DECLARE_RENDERER( ft_sdf_renderer_class )
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FT_END_HEADER
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#endif /* FTSDFREND_H_ */
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/* END */
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@ -0,0 +1,10 @@
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FTMODULE_H_COMMANDS += SDF_RENDERER
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define SDF_RENDERER
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$(OPEN_DRIVER) FT_Renderer_Class, ft_sdf_renderer_class $(CLOSE_DRIVER)
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$(ECHO_DRIVER)sdf $(ECHO_DRIVER_DESC) signed distance field renderer $(ECHO_DRIVER_DONE)
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endef
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#EOF
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@ -0,0 +1,58 @@
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# sdf driver directory
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#
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SDF_DIR := $(SRC_DIR)/sdf
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# compilation flags for the driver
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#
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SDF_COMPILE := $(CC) $(ANSIFLAGS) \
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$I$(subst /,$(COMPILER_SEP),$(SDF_DIR)) \
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$(INCLUDE_FLAGS) \
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$(FT_CFLAGS)
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# sdf driver sources (i.e., C files)
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#
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SDF_DRV_SRC := $(SDF_DIR)/ftsdfrend.c \
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$(SDF_DIR)/ftsdf.c
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# sdf driver headers
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#
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SDF_DRV_H := $(SDF_DRV_SRC:%.c=%.h) \
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$(SDF_DIR)/ftsdferrs.h
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# sdf driver object(s)
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#
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# SDF_DRV_OBJ_M is used during `multi' builds.
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# SDF_DRV_OBJ_S is used during `single' builds.
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#
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SDF_DRV_OBJ_M := $(SDF_DRV_SRC:$(SDF_DIR)/%.c=$(OBJ_DIR)/%.$O)
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SDF_DRV_OBJ_S := $(OBJ_DIR)/sdf.$O
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# sdf driver source file for single build
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#
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SDF_DRV_SRC_S := $(SDF_DIR)/sdf.c
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# sdf driver - single object
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#
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$(SDF_DRV_OBJ_S): $(SDF_DRV_SRC_S) $(SDF_DRV_SRC) \
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$(FREETYPE_H) $(SDF_DRV_H)
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$(SDF_COMPILE) $T$(subst /,$(COMPILER_SEP),$@ $(SDF_DRV_SRC_S))
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# sdf driver - multiple objects
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#
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$(OBJ_DIR)/%.$O: $(SDF_DIR)/%.c $(FREETYPE_H) $(SDF_DRV_H)
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$(SDF_COMPILE) $T$(subst /,$(COMPILER_SEP),$@ $<)
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# update main driver list
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#
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DRV_OBJ_S += $(SDF_DRV_OBJ_S)
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DRV_OBJ_M += $(SDF_DRV_OBJ_M)
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@ -0,0 +1,9 @@
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#define FT_MAKE_OPTION_SINGLE_OBJECT
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#include "ftsdfrend.c"
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#include "ftsdf.c"
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/* END */
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