Commit 665ac967925618b43b3c87d96eebbd9015dafe4e
2020-08-19T16:29:51
[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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222
diff --git a/ChangeLog b/ChangeLog
index 3f565ee..1bbacd8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,14 @@
2020-08-19 Anuj Verma <anujv@iitbhilai.ac.in>
+ [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.
+
+2020-08-19 Anuj Verma <anujv@iitbhilai.ac.in>
+
[sdf] Add subdivision and bounding box optimization.
* src/sdf/ftsdf.c (sdf_generate_bounding_box): New function, which
diff --git a/src/sdf/ftsdf.c b/src/sdf/ftsdf.c
index f5c95c9..4e814bb 100644
--- a/src/sdf/ftsdf.c
+++ b/src/sdf/ftsdf.c
@@ -3352,4 +3352,198 @@
return error;
}
+
+ /**************************************************************************
+ *
+ * interface functions
+ *
+ */
+
+ static FT_Error
+ sdf_raster_new( FT_Memory memory,
+ FT_Raster* araster)
+ {
+ FT_Error error = FT_Err_Ok;
+ SDF_TRaster* raster = NULL;
+ FT_Int line = __LINE__;
+
+ /* in non-debugging mode this is not used */
+ FT_UNUSED( line );
+
+
+ *araster = 0;
+ if ( !FT_ALLOC( raster, sizeof ( SDF_TRaster ) ) )
+ {
+ raster->memory = memory;
+ *araster = (FT_Raster)raster;
+ }
+
+ return error;
+ }
+
+
+ static void
+ sdf_raster_reset( FT_Raster raster,
+ unsigned char* pool_base,
+ unsigned long pool_size )
+ {
+ FT_UNUSED( raster );
+ FT_UNUSED( pool_base );
+ FT_UNUSED( pool_size );
+ }
+
+
+ static FT_Error
+ sdf_raster_set_mode( FT_Raster raster,
+ unsigned long mode,
+ void* args )
+ {
+ FT_UNUSED( raster );
+ FT_UNUSED( mode );
+ FT_UNUSED( args );
+
+ return FT_Err_Ok;
+ }
+
+
+ static FT_Error
+ sdf_raster_render( FT_Raster raster,
+ const FT_Raster_Params* params )
+ {
+ FT_Error error = FT_Err_Ok;
+ SDF_TRaster* sdf_raster = (SDF_TRaster*)raster;
+ FT_Outline* outline = NULL;
+ const SDF_Raster_Params* sdf_params = (const SDF_Raster_Params*)params;
+
+ FT_Memory memory = NULL;
+ SDF_Shape* shape = NULL;
+ SDF_Params internal_params;
+
+ SDF_MEMORY_TRACKER_DECLARE();
+
+
+ /* check for valid arguments */
+ if ( !sdf_raster || !sdf_params )
+ {
+ error = FT_THROW( Invalid_Argument );
+ goto Exit;
+ }
+
+ outline = (FT_Outline*)sdf_params->root.source;
+
+ /* check whether outline is valid */
+ if ( !outline )
+ {
+ error = FT_THROW( Invalid_Outline );
+ goto Exit;
+ }
+
+ /* if the outline is empty, return */
+ if ( outline->n_points <= 0 || outline->n_contours <= 0 )
+ goto Exit;
+
+ /* check whether the outline has valid fields */
+ if ( !outline->contours || !outline->points )
+ {
+ error = FT_THROW( Invalid_Outline );
+ goto Exit;
+ }
+
+ /* check whether spread is set properly */
+ if ( sdf_params->spread > MAX_SPREAD ||
+ sdf_params->spread < MIN_SPREAD )
+ {
+ FT_TRACE0(( "sdf_raster_render:"
+ " The `spread' field of `SDF_Raster_Params' is invalid,\n" ));
+ FT_TRACE0(( " "
+ " the value of this field must be within [%d, %d].\n",
+ MIN_SPREAD, MAX_SPREAD ));
+ FT_TRACE0(( " "
+ " Also, you must pass `SDF_Raster_Params' instead of\n" ));
+ FT_TRACE0(( " "
+ " the default `FT_Raster_Params' while calling\n" ));
+ FT_TRACE0(( " "
+ " this function and set the fields properly.\n" ));
+
+ error = FT_THROW( Invalid_Argument );
+ goto Exit;
+ }
+
+ memory = sdf_raster->memory;
+ if ( !memory )
+ {
+ FT_TRACE0(( "sdf_raster_render:"
+ " Raster not setup properly,\n" ));
+ FT_TRACE0(( " "
+ " unable to find memory handle.\n" ));
+
+ error = FT_THROW( Invalid_Handle );
+ goto Exit;
+ }
+
+ /* set up the parameters */
+ internal_params.orientation = FT_Outline_Get_Orientation( outline );
+ internal_params.flip_sign = sdf_params->flip_sign;
+ internal_params.flip_y = sdf_params->flip_y;
+ internal_params.overload_sign = 0;
+
+ /* assign a custom user pointer to `FT_Memory`; */
+ /* also keep a reference of the old user pointer */
+ /* in order to debug the memory while compiling */
+ /* with `FT_DEBUG_MEMORY`. */
+ SDF_MEMORY_TRACKER_SETUP();
+
+ FT_CALL( sdf_shape_new( memory, &shape ) );
+
+ FT_CALL( sdf_outline_decompose( outline, shape ) );
+
+#if 0
+ /* XXX to be added */
+ if ( sdf_params->overlaps )
+ FT_CALL( sdf_generate_with_overlaps( internal_params,
+ shape, sdf_params->spread,
+ sdf_params->root.target ) );
+ else
+#endif
+ FT_CALL( sdf_generate_subdivision( internal_params,
+ shape, sdf_params->spread,
+ sdf_params->root.target ) );
+
+ if ( shape )
+ sdf_shape_done( &shape );
+
+ /* restore the memory->user */
+ SDF_MEMORY_TRACKER_DONE();
+
+ Exit:
+ return error;
+ }
+
+
+ static void
+ sdf_raster_done( FT_Raster raster )
+ {
+ FT_Memory memory = (FT_Memory)((SDF_TRaster*)raster)->memory;
+ FT_Int line = __LINE__;
+
+ /* in non-debugging mode this is not used */
+ FT_UNUSED( line );
+
+
+ FT_FREE( raster );
+ }
+
+
+ FT_DEFINE_RASTER_FUNCS(
+ ft_sdf_raster,
+
+ FT_GLYPH_FORMAT_OUTLINE,
+
+ (FT_Raster_New_Func) sdf_raster_new, /* raster_new */
+ (FT_Raster_Reset_Func) sdf_raster_reset, /* raster_reset */
+ (FT_Raster_Set_Mode_Func)sdf_raster_set_mode, /* raster_set_mode */
+ (FT_Raster_Render_Func) sdf_raster_render, /* raster_render */
+ (FT_Raster_Done_Func) sdf_raster_done /* raster_done */
+ )
+
/* END */