[mutter/gbsneto/graphene-matrix: 3/20] clutter/offscreen-effect: Use graphene APIs

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 3705348a17ff4b015e034cdc34bdeb92d65b4a11
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Sep 11 16:34:59 2020 -0300

    clutter/offscreen-effect: Use graphene APIs
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1439

 clutter/clutter/clutter-offscreen-effect.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)
---
diff --git a/clutter/clutter/clutter-offscreen-effect.c b/clutter/clutter/clutter-offscreen-effect.c
index e4a9a45e5a..08b419878f 100644
--- a/clutter/clutter/clutter-offscreen-effect.c
+++ b/clutter/clutter/clutter-offscreen-effect.c
@@ -428,6 +428,7 @@ clutter_offscreen_effect_paint_texture (ClutterOffscreenEffect *effect,
   CoglFramebuffer *framebuffer =
     clutter_paint_context_get_framebuffer (paint_context);
   graphene_matrix_t modelview;
+  graphene_matrix_t translate;
   float resource_scale;
 
   cogl_framebuffer_push_matrix (framebuffer);
@@ -441,14 +442,19 @@ clutter_offscreen_effect_paint_texture (ClutterOffscreenEffect *effect,
 
   if (resource_scale != 1.0f)
     {
+      graphene_matrix_t scale;
       float paint_scale = 1.0f / resource_scale;
-      cogl_matrix_scale (&modelview, paint_scale, paint_scale, 1);
+
+      graphene_matrix_init_scale (&scale, paint_scale, paint_scale, 1.f);
+      graphene_matrix_multiply (&scale, &modelview, &modelview);
     }
 
-  cogl_matrix_translate (&modelview,
-                         priv->fbo_offset_x,
-                         priv->fbo_offset_y,
-                         0.0f);
+  graphene_matrix_init_translate (&translate,
+                                  &GRAPHENE_POINT3D_INIT (priv->fbo_offset_x,
+                                                          priv->fbo_offset_y,
+                                                          0.0f));
+  graphene_matrix_multiply (&translate, &modelview, &modelview);
+
   cogl_framebuffer_set_modelview_matrix (framebuffer, &modelview);
 
   /* paint the target material; this is virtualized for