[gtk] gl: Handle row stride for glyph cache upload

[Matthias Clasen <matthiasc src gnome org>]

commit 646c5f369f6dbaefb37138188959512dd820bb98
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Oct 11 21:16:40 2019 -0400

    gl: Handle row stride for glyph cache upload
    
    In theory, we can have data with a stride here,
    so set the necessary parameters to tell GL about
    it.

 gsk/gl/gskglglyphcache.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gsk/gl/gskglglyphcache.c b/gsk/gl/gskglglyphcache.c
index 0357f9910d..66b84a02be 100644
--- a/gsk/gl/gskglglyphcache.c
+++ b/gsk/gl/gskglglyphcache.c
@@ -189,11 +189,13 @@ upload_glyph (GlyphCacheKey    *key,
 
   if (render_glyph (key, value, &r))
     {
+      glPixelStorei (GL_UNPACK_ROW_LENGTH, r.stride / 4);
       glBindTexture (GL_TEXTURE_2D, value->texture_id);
       glTexSubImage2D (GL_TEXTURE_2D, 0,
                        r.x, r.y, r.width, r.height,
                        GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
                        r.data);
+      glPixelStorei (GL_UNPACK_ROW_LENGTH, 0);
       g_free (r.data);
     }