[freetype2] ewaldhew-wip fb43043 37/52: decoder funcs

[Hew Yih Shiuan Ewald]

branch: ewaldhew-wip
commit fb43043674060da8956fda152c916ebcaab20bcf
Author: Ewald Hew <address@hidden>
Commit: Ewald Hew <address@hidden>

    decoder funcs
---
 src/psaux/Jamfile    |   2 +
 src/psaux/psaux.c    |   1 +
 src/psaux/psdecode.c | 158 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/psaux/psdecode.h |  13 +++++
 src/psaux/rules.mk   |   1 +
 5 files changed, 175 insertions(+)

diff --git a/src/psaux/Jamfile b/src/psaux/Jamfile
index 392acab..ab861e6 100644
--- a/src/psaux/Jamfile
+++ b/src/psaux/Jamfile
@@ -22,6 +22,8 @@ SubDir  FT2_TOP $(FT2_SRC_DIR) psaux ;
                psobjs
                t1cmap
                t1decode
+               cffdecode
+               psdecode
                psarrst
                psblues
                pserror
diff --git a/src/psaux/psaux.c b/src/psaux/psaux.c
index e30c9b0..8c9e633 100644
--- a/src/psaux/psaux.c
+++ b/src/psaux/psaux.c
@@ -26,6 +26,7 @@
 #include "t1cmap.c"
 #include "t1decode.c"
 #include "cffdecode.c"
+#include "psdecode.c"
 
 #include "psarrst.c"
 #include "psblues.c"
diff --git a/src/psaux/psdecode.c b/src/psaux/psdecode.c
new file mode 100644
index 0000000..92d4326
--- /dev/null
+++ b/src/psaux/psdecode.c
@@ -0,0 +1,158 @@
+
+
+#include <ft2build.h>
+#include FT_INTERNAL_SERVICE_H
+#include FT_SERVICE_CFF_TABLE_LOAD_H
+
+#include "psdecode.h"
+#include "psobjs.h"
+
+#include "psauxerr.h"
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    ps_decoder_init                                                    */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    Initializes a given glyph decoder.                                 */
+  /*                                                                       */
+  /* <InOut>                                                               */
+  /*    decoder :: A pointer to the glyph builder to initialize.           */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    face      :: The current face object.                              */
+  /*                                                                       */
+  /*    size      :: The current size object.                              */
+  /*                                                                       */
+  /*    slot      :: The current glyph object.                             */
+  /*                                                                       */
+  /*    hinting   :: Whether hinting is active.                            */
+  /*                                                                       */
+  /*    hint_mode :: The hinting mode.                                     */
+  /*                                                                       */
+  FT_LOCAL_DEF( void )
+  ps_decoder_init( PS_Decoder*     decoder,
+                   TT_Face         face,
+                   FT_Size         size,
+                   CFF_GlyphSlot   slot,
+                   FT_Byte**       glyph_names,
+                   PS_Blend        blend,
+                   FT_Bool         hinting,
+                   FT_Render_Mode  hint_mode,
+                   PS_Decoder_Get_Glyph_Callback   get_callback,
+                   PS_Decoder_Free_Glyph_Callback  free_callback )
+  {
+    CFF_Font  cff = (CFF_Font)face->extra.data;
+
+
+    /* clear everything */
+    FT_ZERO( decoder );
+
+    /* initialize builder */
+    ps_builder_init( &decoder->builder, face, size, slot, hinting );
+
+    if ( face->is_t1 )
+    {
+      /* retrieve PSNames interface from list of current modules */
+      {
+        FT_Service_PsCMaps  psnames;
+
+
+        FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
+        if ( !psnames )
+        {
+          FT_ERROR(( "ps_decoder_init:"
+                     " the `psnames' module is not available\n" ));
+          return FT_THROW( Unimplemented_Feature );
+        }
+
+        decoder->psnames = psnames;
+      }
+
+      /* decoder->buildchar and decoder->len_buildchar have to be  */
+      /* initialized by the caller since we cannot know the length */
+      /* of the BuildCharArray                                     */
+
+      decoder->num_glyphs     = (FT_UInt)face->root.num_glyphs;
+      decoder->glyph_names    = glyph_names;
+      decoder->blend          = blend;
+    }
+    else
+    {
+      /* initialize Type2 decoder */
+      decoder->cff          = cff;
+      decoder->num_globals  = cff->global_subrs_index.count;
+      decoder->globals      = cff->global_subrs;
+      decoder->globals_bias = cff_compute_bias(
+                                cff->top_font.font_dict.charstring_type,
+                                decoder->num_globals );
+    }
+
+    decoder->hint_mode    = hint_mode;
+
+    decoder->get_glyph_callback  = get_callback;
+    decoder->free_glyph_callback = free_callback;
+  }
+
+
+  /* this function is used to select the subfont */
+  /* and the locals subrs array                  */
+  FT_LOCAL_DEF( FT_Error )
+  ps_decoder_prepare( PS_Decoder*  decoder,
+                      FT_Size      size,
+                      FT_UInt      glyph_index )
+  {
+    PS_Builder   *builder = &decoder->builder;
+    FT_Error      error   = FT_Err_Ok;
+
+    if ( !builder->face->is_t1 )
+    {
+      CFF_Font      cff     = (CFF_Font)builder->face->extra.data;
+      CFF_SubFont   sub     = &cff->top_font;
+
+      FT_Service_CFFLoad  cffload = (FT_Service_CFFLoad)cff->cffload;
+
+      /* manage CID fonts */
+      if ( cff->num_subfonts )
+      {
+        FT_Byte  fd_index = cffload->fd_select_get( &cff->fd_select, 
glyph_index );
+
+
+        if ( fd_index >= cff->num_subfonts )
+        {
+          FT_TRACE4(( "cff_decoder_prepare: invalid CID subfont index\n" ));
+          error = FT_THROW( Invalid_File_Format );
+          goto Exit;
+        }
+
+        FT_TRACE3(( "  in subfont %d:\n", fd_index ));
+
+        sub = cff->subfonts[fd_index];
+
+        if ( builder->hints_funcs && size )
+        {
+          CFF_Internal  internal = (CFF_Internal)size->internal->module_data;
+
+
+          /* for CFFs without subfonts, this value has already been set */
+          builder->hints_globals = (void *)internal->subfonts[fd_index];
+        }
+
+        decoder->num_locals    = sub->local_subrs_index.count;
+        decoder->locals        = sub->local_subrs;
+        decoder->locals_bias   = cff_compute_bias(
+                                   
decoder->cff->top_font.font_dict.charstring_type,
+                                   decoder->num_locals );
+
+        decoder->glyph_width   = sub->private_dict.default_width;
+        decoder->nominal_width = sub->private_dict.nominal_width;
+
+        decoder->current_subfont = sub;
+      }
+    }
+
+  Exit:
+    return error;
+  }
diff --git a/src/psaux/psdecode.h b/src/psaux/psdecode.h
new file mode 100644
index 0000000..2a53065
--- /dev/null
+++ b/src/psaux/psdecode.h
@@ -0,0 +1,13 @@
+#ifndef PSDECODE_H_
+#define PSDECODE_H_
+
+
+#include <ft2build.h>
+#include FT_INTERNAL_POSTSCRIPT_AUX_H
+
+#include "cffdecode.h"
+#include "t1decode.h"
+
+
+
+#endif
diff --git a/src/psaux/rules.mk b/src/psaux/rules.mk
index b6767ef..f34bdd2 100644
--- a/src/psaux/rules.mk
+++ b/src/psaux/rules.mk
@@ -36,6 +36,7 @@ PSAUX_DRV_SRC := $(PSAUX_DIR)/psobjs.c   \
                  $(PSAUX_DIR)/psauxmod.c \
                  $(PSAUX_DIR)/psarrst.c \
                  $(PSAUX_DIR)/psblues.c \
+                 $(PSAUX_DIR)/psdecode.c \
                  $(PSAUX_DIR)/pserror.c \
                  $(PSAUX_DIR)/psfont.c  \
                  $(PSAUX_DIR)/psft.c    \