[sdf] Add interface functions for the 'sdf' rasterizer.
* src/sdf/ftsdf.c (sdf_raster_new, sdf_raster_reset, sdf_raster_set_mode, sdf_raster_render, sdf_raster_done): New functions. (ft_sdf_raster): New structure.
This commit is contained in:
Anuj Verma
Werner Lemberg
parent
1010f2c39c
commit
665ac96792
@ -1,3 +1,12 @@
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2020-08-19 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Add interface functions for the 'sdf' rasterizer.
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* src/sdf/ftsdf.c (sdf_raster_new, sdf_raster_reset,
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sdf_raster_set_mode, sdf_raster_render, sdf_raster_done): New
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functions.
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(ft_sdf_raster): New structure.
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2020-08-19 Anuj Verma <anujv@iitbhilai.ac.in>
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[sdf] Add subdivision and bounding box optimization.
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194
src/sdf/ftsdf.c
194
src/sdf/ftsdf.c
@ -3352,4 +3352,198 @@
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return error;
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}
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/**************************************************************************
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*
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* interface functions
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*
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*/
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static FT_Error
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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_Err_Ok;
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SDF_TRaster* raster = NULL;
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FT_Int line = __LINE__;
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/* in non-debugging mode this is not used */
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FT_UNUSED( line );
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*araster = 0;
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if ( !FT_ALLOC( raster, sizeof ( SDF_TRaster ) ) )
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{
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raster->memory = memory;
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*araster = (FT_Raster)raster;
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}
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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 FT_Error
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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 FT_Err_Ok;
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}
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static FT_Error
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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_Error error = FT_Err_Ok;
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SDF_TRaster* sdf_raster = (SDF_TRaster*)raster;
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FT_Outline* outline = NULL;
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const SDF_Raster_Params* sdf_params = (const SDF_Raster_Params*)params;
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FT_Memory memory = NULL;
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SDF_Shape* shape = NULL;
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SDF_Params internal_params;
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SDF_MEMORY_TRACKER_DECLARE();
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/* check for valid arguments */
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if ( !sdf_raster || !sdf_params )
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{
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error = FT_THROW( Invalid_Argument );
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goto Exit;
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}
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outline = (FT_Outline*)sdf_params->root.source;
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/* check whether outline is valid */
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if ( !outline )
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{
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error = FT_THROW( Invalid_Outline );
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goto Exit;
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}
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/* if the outline is empty, return */
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if ( outline->n_points <= 0 || outline->n_contours <= 0 )
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goto Exit;
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/* check whether the outline has valid fields */
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if ( !outline->contours || !outline->points )
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{
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error = FT_THROW( Invalid_Outline );
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goto Exit;
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}
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/* check whether spread is set properly */
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if ( sdf_params->spread > MAX_SPREAD ||
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sdf_params->spread < MIN_SPREAD )
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{
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FT_TRACE0(( "sdf_raster_render:"
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" The `spread' field of `SDF_Raster_Params' is invalid,\n" ));
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FT_TRACE0(( " "
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" the value of this field must be within [%d, %d].\n",
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MIN_SPREAD, MAX_SPREAD ));
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FT_TRACE0(( " "
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" Also, you must pass `SDF_Raster_Params' instead of\n" ));
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FT_TRACE0(( " "
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" the default `FT_Raster_Params' while calling\n" ));
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FT_TRACE0(( " "
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" this function and set the fields properly.\n" ));
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error = FT_THROW( Invalid_Argument );
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goto Exit;
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}
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memory = sdf_raster->memory;
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if ( !memory )
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{
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FT_TRACE0(( "sdf_raster_render:"
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" Raster not setup properly,\n" ));
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FT_TRACE0(( " "
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" unable to find memory handle.\n" ));
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error = FT_THROW( Invalid_Handle );
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goto Exit;
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}
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/* set up the parameters */
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internal_params.orientation = FT_Outline_Get_Orientation( outline );
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internal_params.flip_sign = sdf_params->flip_sign;
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internal_params.flip_y = sdf_params->flip_y;
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internal_params.overload_sign = 0;
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/* assign a custom user pointer to `FT_Memory`; */
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/* also keep a reference of the old user pointer */
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/* in order to debug the memory while compiling */
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/* with `FT_DEBUG_MEMORY`. */
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SDF_MEMORY_TRACKER_SETUP();
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FT_CALL( sdf_shape_new( memory, &shape ) );
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FT_CALL( sdf_outline_decompose( outline, shape ) );
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#if 0
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/* XXX to be added */
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if ( sdf_params->overlaps )
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FT_CALL( sdf_generate_with_overlaps( internal_params,
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shape, sdf_params->spread,
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sdf_params->root.target ) );
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else
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#endif
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FT_CALL( sdf_generate_subdivision( internal_params,
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shape, sdf_params->spread,
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sdf_params->root.target ) );
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if ( shape )
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sdf_shape_done( &shape );
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/* restore the memory->user */
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SDF_MEMORY_TRACKER_DONE();
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Exit:
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return error;
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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_Memory memory = (FT_Memory)((SDF_TRaster*)raster)->memory;
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FT_Int line = __LINE__;
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/* in non-debugging mode this is not used */
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FT_UNUSED( line );
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FT_FREE( 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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