[gtk/wip/baedert/for-master: 52/54] gl renderer: Fix repeat nodes that don't repeat

[Timm Bäder <baedert src gnome org>]

commit 604f44da11da9b46dae6b3d812d8ede29eb2b8ec
Author: Timm Bäder <mail baedert org>
Date:   Tue Nov 19 10:31:21 2019 +0100

    gl renderer: Fix repeat nodes that don't repeat
    
    Fixes #2234

 gsk/gl/gskglrenderer.c            | 4 ++--
 gsk/resources/glsl/repeat.fs.glsl | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/gsk/gl/gskglrenderer.c b/gsk/gl/gskglrenderer.c
index 1e1086d761..357e09108d 100644
--- a/gsk/gl/gskglrenderer.c
+++ b/gsk/gl/gskglrenderer.c
@@ -1973,8 +1973,8 @@ render_repeat_node (GskGLRenderer   *self,
   ops_set_texture (builder, region.texture_id);
 
   op = ops_begin (builder, OP_CHANGE_REPEAT);
-  op->child_bounds[0] = 0; /* Both currently unused */
-  op->child_bounds[1] = 0;
+  op->child_bounds[0] = (node->bounds.origin.x - child_bounds->origin.x) / child_bounds->size.width;
+  op->child_bounds[1] = (node->bounds.origin.y - child_bounds->origin.y) / child_bounds->size.height;
   op->child_bounds[2] = node->bounds.size.width / child_bounds->size.width;
   op->child_bounds[3] = node->bounds.size.height / child_bounds->size.height;
 
diff --git a/gsk/resources/glsl/repeat.fs.glsl b/gsk/resources/glsl/repeat.fs.glsl
index a58047335e..070b56abe6 100644
--- a/gsk/resources/glsl/repeat.fs.glsl
+++ b/gsk/resources/glsl/repeat.fs.glsl
@@ -21,8 +21,8 @@ void main() {
   float mapped_x = (vUv.x - u_texture_rect.x) / tw;
   float mapped_y = (vUv.y - u_texture_rect.y) / th;
 
-  float wrapped_x = wrap(mapped_x * u_child_bounds.z, 1.0);
-  float wrapped_y = wrap(mapped_y * u_child_bounds.w, 1.0);
+  float wrapped_x = u_child_bounds.x + wrap(mapped_x * u_child_bounds.z, 1.0);
+  float wrapped_y = u_child_bounds.y + wrap(mapped_y * u_child_bounds.w, 1.0);
 
   vec2 tp;
   tp.x = u_texture_rect.x + (wrapped_x * tw);