[gtk/wip/chergert/glproto: 635/920] stub out offscreen draw

[Christian Hergert <chergert src gnome org>]

commit 9819e680dda5b8166301da0807953b06f6ba4188
Author: Christian Hergert <chergert redhat com>
Date:   Sat Jan 2 17:22:31 2021 -0800

    stub out offscreen draw

 gsk/next/gskglrenderjob.c | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)
---
diff --git a/gsk/next/gskglrenderjob.c b/gsk/next/gskglrenderjob.c
index e13109d019..6ab567e4db 100644
--- a/gsk/next/gskglrenderjob.c
+++ b/gsk/next/gskglrenderjob.c
@@ -94,8 +94,25 @@ typedef struct _GskGLRenderModelview
   graphene_matrix_t matrix;
 } GskGLRenderModelview;
 
-static void gsk_gl_render_job_visit_node (GskGLRenderJob *job,
-                                          GskRenderNode  *node);
+typedef struct _GskGLRenderOffscreen
+{
+  const graphene_rect_t *bounds;
+  guint texture_id;
+  float x;
+  float y;
+  float x2;
+  float y2;
+  guint force_offscreen : 1;
+  guint reset_clip : 1;
+  guint do_not_cache : 1;
+  guint linear_filter : 1;
+} GskGLRenderOffscreen;
+
+static void     gsk_gl_render_job_visit_node       (GskGLRenderJob       *job,
+                                                    GskRenderNode        *node);
+static gboolean gsk_gl_render_job_render_offscreen (GskGLRenderJob       *job,
+                                                    GskRenderNode        *node,
+                                                    GskGLRenderOffscreen *offscreen);
 
 static inline gboolean G_GNUC_PURE
 node_is_invisible (const GskRenderNode *node)
@@ -1478,6 +1495,18 @@ gsk_gl_render_job_visit_node (GskGLRenderJob *job,
     }
 }
 
+static gboolean
+gsk_gl_render_job_render_offscreen (GskGLRenderJob       *job,
+                                    GskRenderNode        *node,
+                                    GskGLRenderOffscreen *offscreen)
+{
+  g_assert (job != NULL);
+  g_assert (node != NULL);
+  g_assert (offscreen != NULL);
+
+  return FALSE;
+}
+
 void
 gsk_gl_render_job_render (GskGLRenderJob *job,
                           GskRenderNode  *root)