minor fixes

src/hb-ot-color-colr-table.cc

@@ -0,0 +1,73 @@
+#include "hb-ot-color-colr-table.hh"
+
+namespace OT {
+
+void PaintColrLayers::paint_glyph (hb_paint_context_t *c) const
+{
+  const LayerList &paint_offset_lists = c->get_colr_table ()->get_layerList ();
+  for (unsigned i = firstLayerIndex; i < firstLayerIndex + numLayers; i++)
+  {
+    const Paint &paint = std::addressof (paint_offset_lists) + paint_offset_lists[i];
+    c->funcs->push_group (c->data);
+    paint_glyph_dispatch (&paint, c);
+    c->funcs->pop_group (c->data, HB_PAINT_COMPOSITE_MODE_SRC_OVER);
+  }
+}
+
+void PaintColrGlyph::paint_glyph (hb_paint_context_t *c) const
+{
+  const COLR *colr_table = c->get_colr_table ();
+  const Paint *paint = colr_table->get_base_glyph_paint (gid);
+
+  if (paint)
+    paint_glyph_dispatch (paint, c);
+}
+
+}
+
+unsigned int
+hb_color_line_get_color_stops (hb_color_line_t *cl,
+                               unsigned int start,
+                               unsigned int *count,
+                               hb_color_stop_t *color_stops)
+{
+  switch (cl->format)
+  {
+  case 4:
+    return reinterpret_cast<const OT::PaintLinearGradient<OT::NoVariable> *>(cl->base)->get_color_stops (start, count, color_stops);
+  case 5:
+    return reinterpret_cast<const OT::PaintLinearGradient<OT::Variable> *>(cl->base)->get_color_stops (start, count, color_stops);
+  case 6:
+    return reinterpret_cast<const OT::PaintRadialGradient<OT::NoVariable> *>(cl->base)->get_color_stops (start, count, color_stops);
+  case 7:
+    return reinterpret_cast<const OT::PaintRadialGradient<OT::Variable> *>(cl->base)->get_color_stops (start, count, color_stops);
+  case 8:
+    return reinterpret_cast<const OT::PaintSweepGradient<OT::NoVariable> *>(cl->base)->get_color_stops (start, count, color_stops);
+  case 9:
+    return reinterpret_cast<const OT::PaintSweepGradient<OT::Variable> *>(cl->base)->get_color_stops (start, count, color_stops);
+  default: assert (0);
+  }
+  return 0;
+}
+
+hb_paint_extend_t
+hb_color_line_get_extend (hb_color_line_t *cl)
+{
+  switch (cl->format)
+  {
+  case 4:
+    return reinterpret_cast<const OT::PaintLinearGradient<OT::NoVariable> *>(cl->base)->get_extend ();
+  case 5:
+    return reinterpret_cast<const OT::PaintLinearGradient<OT::Variable> *>(cl->base)->get_extend ();
+  case 6:
+    return reinterpret_cast<const OT::PaintRadialGradient<OT::NoVariable> *>(cl->base)->get_extend ();
+  case 7:
+    return reinterpret_cast<const OT::PaintRadialGradient<OT::Variable> *>(cl->base)->get_extend ();
+  case 8:
+    return reinterpret_cast<const OT::PaintSweepGradient<OT::NoVariable> *>(cl->base)->get_extend ();
+  case 9:
+    return reinterpret_cast<const OT::PaintSweepGradient<OT::Variable> *>(cl->base)->get_extend ();
+  default: assert (0);
+  }
+  return HB_PAINT_EXTEND_PAD;
+}

src/hb-ot-color-colr-table.hh

@@ -1916,8 +1916,13 @@ struct COLR
   {
     const BaseGlyphList &baseglyph_paintrecords = this+baseGlyphList;
     const BaseGlyphPaintRecord* record = get_base_glyph_paintrecord (glyph);
-    const Paint &paint = &baseglyph_paintrecords+record->paint;
-    return &paint;
+    if (record)
+    {
+      const Paint &paint = &baseglyph_paintrecords+record->paint;
+      return &paint;
+    }
+    else
+      return nullptr;
   }
 
   bool