1 files changed, 121 insertions, 0 deletions
diff --git a/source/blender/draw/engines/overlay/overlay_edit_curve.cc b/source/blender/draw/engines/overlay/overlay_edit_curve.cc
new file mode 100644
index 00000000000..b84eb9b3a43
--- /dev/null
+++ b/source/blender/draw/engines/overlay/overlay_edit_curve.cc
@@ -0,0 +1,121 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2019 Blender Foundation. */
+
+/** \file
+ * \ingroup draw_engine
+ */
+
+#include "DRW_render.h"
+
+#include "DNA_curve_types.h"
+
+#include "overlay_private.hh"
+
+void OVERLAY_edit_curve_cache_init(OVERLAY_Data *vedata)
+{
+  OVERLAY_PassList *psl = vedata->psl;
+  OVERLAY_PrivateData *pd = vedata->stl->pd;
+  const DRWContextState *draw_ctx = DRW_context_state_get();
+  View3D *v3d = draw_ctx->v3d;
+  DRWShadingGroup *grp;
+  GPUShader *sh;
+  DRWState state;
+
+  pd->edit_curve.show_handles = v3d->overlay.handle_display != CURVE_HANDLE_NONE;
+  pd->edit_curve.handle_display = v3d->overlay.handle_display;
+  pd->shdata.edit_curve_normal_length = v3d->overlay.normals_length;
+
+  /* Run Twice for in-front passes. */
+  for (int i = 0; i < 2; i++) {
+    state = DRW_STATE_WRITE_COLOR | DRW_STATE_WRITE_DEPTH;
+    state |= ((i == 0) ? DRW_STATE_DEPTH_LESS_EQUAL : DRW_STATE_DEPTH_ALWAYS);
+    DRW_PASS_CREATE(psl->edit_curve_wire_ps[i], state | pd->clipping_state);
+
+    sh = OVERLAY_shader_edit_curve_wire();
+    pd->edit_curve_normal_grp[i] = grp = DRW_shgroup_create(sh, psl->edit_curve_wire_ps[i]);
+    DRW_shgroup_uniform_block(grp, "globalsBlock", G_draw.block_ubo);
+    DRW_shgroup_uniform_float_copy(grp, "normalSize", pd->shdata.edit_curve_normal_length);
+
+    pd->edit_curve_wire_grp[i] = grp = DRW_shgroup_create(sh, psl->edit_curve_wire_ps[i]);
+    DRW_shgroup_uniform_block(grp, "globalsBlock", G_draw.block_ubo);
+    DRW_shgroup_uniform_float_copy(grp, "normalSize", 0.0f);
+  }
+  {
+    state = DRW_STATE_WRITE_COLOR;
+    DRW_PASS_CREATE(psl->edit_curve_handle_ps, state | pd->clipping_state);
+
+    sh = OVERLAY_shader_edit_curve_handle();
+    pd->edit_curve_handle_grp = grp = DRW_shgroup_create(sh, psl->edit_curve_handle_ps);
+    DRW_shgroup_uniform_block(grp, "globalsBlock", G_draw.block_ubo);
+    DRW_shgroup_uniform_bool_copy(grp, "showCurveHandles", pd->edit_curve.show_handles);
+    DRW_shgroup_uniform_int_copy(grp, "curveHandleDisplay", pd->edit_curve.handle_display);
+    DRW_shgroup_state_enable(grp, DRW_STATE_BLEND_ALPHA);
+
+    sh = OVERLAY_shader_edit_curve_point();
+    pd->edit_curve_points_grp = grp = DRW_shgroup_create(sh, psl->edit_curve_handle_ps);
+    DRW_shgroup_uniform_bool_copy(grp, "showCurveHandles", pd->edit_curve.show_handles);
+    DRW_shgroup_uniform_int_copy(grp, "curveHandleDisplay", pd->edit_curve.handle_display);
+    DRW_shgroup_uniform_block(grp, "globalsBlock", G_draw.block_ubo);
+  }
+}
+
+void OVERLAY_edit_curve_cache_populate(OVERLAY_Data *vedata, Object *ob)
+{
+  OVERLAY_PrivateData *pd = vedata->stl->pd;
+  bool draw_normals = (pd->overlay.edit_flag & V3D_OVERLAY_EDIT_CU_NORMALS) != 0;
+  bool do_xray = (ob->dtx & OB_DRAW_IN_FRONT) != 0;
+
+  Curve *cu = static_cast<Curve *>(ob->data);
+  struct GPUBatch *geom;
+
+  geom = DRW_cache_curve_edge_wire_get(ob);
+  if (geom) {
+    DRW_shgroup_call_no_cull(pd->edit_curve_wire_grp[do_xray], geom, ob);
+  }
+
+  if ((cu->flag & CU_3D) && draw_normals) {
+    geom = DRW_cache_curve_edge_normal_get(ob);
+    DRW_shgroup_call_instances(pd->edit_curve_normal_grp[do_xray], ob, geom, 3);
+  }
+
+  geom = DRW_cache_curve_edge_overlay_get(ob);
+  if (geom) {
+    DRW_shgroup_call_no_cull(pd->edit_curve_handle_grp, geom, ob);
+  }
+
+  geom = DRW_cache_curve_vert_overlay_get(ob);
+  if (geom) {
+    DRW_shgroup_call_no_cull(pd->edit_curve_points_grp, geom, ob);
+  }
+}
+
+void OVERLAY_edit_surf_cache_populate(OVERLAY_Data *vedata, Object *ob)
+{
+  OVERLAY_PrivateData *pd = vedata->stl->pd;
+  struct GPUBatch *geom;
+
+  geom = DRW_cache_curve_edge_overlay_get(ob);
+  if (geom) {
+    DRW_shgroup_call_no_cull(pd->edit_curve_handle_grp, geom, ob);
+  }
+
+  geom = DRW_cache_curve_vert_overlay_get(ob);
+  if (geom) {
+    DRW_shgroup_call_no_cull(pd->edit_curve_points_grp, geom, ob);
+  }
+}
+
+void OVERLAY_edit_curve_draw(OVERLAY_Data *vedata)
+{
+  OVERLAY_PassList *psl = vedata->psl;
+  OVERLAY_FramebufferList *fbl = vedata->fbl;
+
+  if (DRW_state_is_fbo()) {
+    GPU_framebuffer_bind(fbl->overlay_default_fb);
+  }
+
+  DRW_draw_pass(psl->edit_curve_wire_ps[0]);
+  DRW_draw_pass(psl->edit_curve_wire_ps[1]);
+
+  DRW_draw_pass(psl->edit_curve_handle_ps);
+}