[freetype2] GSoC-2019-moazin 705320b 24/47: Check if the size has been properly set.

[Moazin Khatti]

branch: GSoC-2019-moazin
commit 705320b72d67d7a03d992391b0fa90b4b4a08498
Author: Moazin Khatti <address@hidden>
Commit: Moazin Khatti <address@hidden>

    Check if the size has been properly set.
    
    For TTF outlines this is already handled, however,
    for traditional CFF outlines the check happens too
    late. We need to check early.
---
 src/cff/cffgload.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/cff/cffgload.c b/src/cff/cffgload.c
index 1c1fb93..3373389 100644
--- a/src/cff/cffgload.c
+++ b/src/cff/cffgload.c
@@ -358,6 +358,13 @@
       FT_UShort     advanceX;
       FT_UShort     advanceY;
 
+      if ( ( size->root.metrics.x_ppem < 1 ||
+             size->root.metrics.y_ppem < 1 ) )
+      {
+        error = FT_THROW( Invalid_Size_Handle );
+        return error;
+      }
+
       FT_TRACE3(( "Attemping to load SVG glyph\n" ));
       sfnt = (SFNT_Service)((TT_Face)glyph->root.face)->sfnt;
       error = sfnt->load_svg_doc( (FT_GlyphSlot)glyph, glyph_index );