feature/android 7fb0df0ce2 3/7: Fix graphics state when instructing glyphs

[Po Lu]

branch: feature/android
commit 7fb0df0ce2858eeb03ec18b540acf49a5b8d90c9
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Fix graphics state when instructing glyphs
    
    * src/sfntfont.c (sfntfont_get_glyph_outline): Take new argument
    STATE and restore it prior to instructing the glyph.
    (sfntfont_measure_instructed_pcm, sfntfont_measure_pcm)
    (sfntfont_draw): Adjust accordingly.
---
 src/sfntfont.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/src/sfntfont.c b/src/sfntfont.c
index 607ab30afd..9ab76a3082 100644
--- a/src/sfntfont.c
+++ b/src/sfntfont.c
@@ -1457,7 +1457,7 @@ sfntfont_dereference_outline (struct sfnt_glyph_outline 
*outline)
    LOCA_LONG and LOCA_SHORT, whichever is set.
 
    If INTERPRETER is non-NULL, then possibly use the unscaled glyph
-   metrics in METRICS when instructing the glyph.
+   metrics in METRICS and the interpreter STATE to instruct the glyph.
 
    Return the outline with an incremented reference count and enter
    the generated outline into CACHE upon success, possibly discarding
@@ -1472,7 +1472,8 @@ sfntfont_get_glyph_outline (sfnt_glyph glyph_code,
                            struct sfnt_loca_table_short *loca_short,
                            struct sfnt_loca_table_long *loca_long,
                            struct sfnt_interpreter *interpreter,
-                           struct sfnt_glyph_metrics *metrics)
+                           struct sfnt_glyph_metrics *metrics,
+                           struct sfnt_graphics_state *state)
 {
   struct sfnt_outline_cache *start;
   struct sfnt_glyph_outline *outline;
@@ -1518,6 +1519,10 @@ sfntfont_get_glyph_outline (sfnt_glyph glyph_code,
 
   if (interpreter && glyph->simple)
     {
+      /* Restore the interpreter state from the snapshot taken after
+        loading the preprogram.  */
+      interpreter->state = *state;
+
       error = sfnt_interpret_simple_glyph (glyph, interpreter,
                                           metrics, &value);
 
@@ -2269,7 +2274,8 @@ sfntfont_measure_instructed_pcm (struct sfnt_font_info 
*font, sfnt_glyph glyph,
                                        font->glyf, font->head,
                                        font->loca_short,
                                        font->loca_long,
-                                       font->interpreter, &metrics);
+                                       font->interpreter, &metrics,
+                                       &font->state);
 
   if (!outline)
     return 1;
@@ -2316,7 +2322,8 @@ sfntfont_measure_pcm (struct sfnt_font_info *font, 
sfnt_glyph glyph,
                                        &font->outline_cache_size,
                                        font->glyf, font->head,
                                        font->loca_short,
-                                       font->loca_long, NULL, NULL);
+                                       font->loca_long, NULL, NULL,
+                                       NULL);
 
   if (!outline)
     return 1;
@@ -2465,7 +2472,8 @@ sfntfont_draw (struct glyph_string *s, int from, int to,
                                            info->loca_short,
                                            info->loca_long,
                                            info->interpreter,
-                                           &metrics);
+                                           &metrics,
+                                           &info->state);
       x_coords[i - from] = 0;
 
       if (!outline)