1 files changed, 83 insertions, 0 deletions
diff --git a/source/blender/draw/engines/overlay/overlay_fade.cc b/source/blender/draw/engines/overlay/overlay_fade.cc
new file mode 100644
index 00000000000..b9523a4eac9
--- /dev/null
+++ b/source/blender/draw/engines/overlay/overlay_fade.cc
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2020 Blender Foundation. */
+
+/** \file
+ * \ingroup draw_engine
+ */
+
+#include "BKE_paint.h"
+#include "DRW_render.h"
+
+#include "ED_view3d.h"
+
+#include "overlay_private.hh"
+
+void OVERLAY_fade_init(OVERLAY_Data * /*vedata*/)
+{
+}
+
+void OVERLAY_fade_cache_init(OVERLAY_Data *vedata)
+{
+  OVERLAY_PassList *psl = vedata->psl;
+  OVERLAY_PrivateData *pd = vedata->stl->pd;
+
+  for (int i = 0; i < 2; i++) {
+    /* Non Meshes Pass (Camera, empties, lights ...) */
+    DRWState state = DRW_STATE_WRITE_COLOR | DRW_STATE_DEPTH_EQUAL | DRW_STATE_BLEND_ALPHA;
+    DRW_PASS_CREATE(psl->fade_ps[i], state | pd->clipping_state);
+
+    GPUShader *sh = OVERLAY_shader_uniform_color();
+    pd->fade_grp[i] = DRW_shgroup_create(sh, psl->fade_ps[i]);
+
+    const DRWContextState *draw_ctx = DRW_context_state_get();
+    float color[4];
+    ED_view3d_background_color_get(draw_ctx->scene, draw_ctx->v3d, color);
+    color[3] = pd->overlay.fade_alpha;
+    if (draw_ctx->v3d->shading.background_type == V3D_SHADING_BACKGROUND_THEME) {
+      srgb_to_linearrgb_v4(color, color);
+    }
+    DRW_shgroup_uniform_vec4_copy(pd->fade_grp[i], "ucolor", color);
+  }
+
+  if (!pd->use_in_front) {
+    pd->fade_grp[IN_FRONT] = pd->fade_grp[NOT_IN_FRONT];
+  }
+}
+
+void OVERLAY_fade_cache_populate(OVERLAY_Data *vedata, Object *ob)
+{
+  OVERLAY_PrivateData *pd = vedata->stl->pd;
+
+  if (pd->xray_enabled) {
+    return;
+  }
+
+  const DRWContextState *draw_ctx = DRW_context_state_get();
+  const bool use_sculpt_pbvh = BKE_sculptsession_use_pbvh_draw(ob, draw_ctx->rv3d) &&
+                               !DRW_state_is_image_render();
+  const bool is_xray = (ob->dtx & OB_DRAW_IN_FRONT) != 0;
+
+  if (use_sculpt_pbvh) {
+    DRW_shgroup_call_sculpt(pd->fade_grp[is_xray], ob, false, false, false, false, false);
+  }
+  else {
+    struct GPUBatch *geom = DRW_cache_object_surface_get(ob);
+    if (geom) {
+      DRW_shgroup_call(pd->fade_grp[is_xray], geom, ob);
+    }
+  }
+}
+
+void OVERLAY_fade_draw(OVERLAY_Data *vedata)
+{
+  OVERLAY_PassList *psl = vedata->psl;
+
+  DRW_draw_pass(psl->fade_ps[NOT_IN_FRONT]);
+}
+
+void OVERLAY_fade_infront_draw(OVERLAY_Data *vedata)
+{
+  OVERLAY_PassList *psl = vedata->psl;
+
+  DRW_draw_pass(psl->fade_ps[IN_FRONT]);
+}