1 files changed, 99 insertions, 0 deletions
diff --git a/servers/rendering/renderer_canvas_render.cpp b/servers/rendering/renderer_canvas_render.cpp
index 3b68cd74fd..49417bd3a6 100644
--- a/servers/rendering/renderer_canvas_render.cpp
+++ b/servers/rendering/renderer_canvas_render.cpp
@@ -29,3 +29,102 @@
 /*************************************************************************/
 
 #include "renderer_canvas_render.h"
+#include "servers/rendering/rendering_server_globals.h"
+
+const Rect2 &RendererCanvasRender::Item::get_rect() const {
+	if (custom_rect || (!rect_dirty && !update_when_visible)) {
+		return rect;
+	}
+
+	//must update rect
+
+	if (commands == nullptr) {
+		rect = Rect2();
+		rect_dirty = false;
+		return rect;
+	}
+
+	Transform2D xf;
+	bool found_xform = false;
+	bool first = true;
+
+	const Item::Command *c = commands;
+
+	while (c) {
+		Rect2 r;
+
+		switch (c->type) {
+			case Item::Command::TYPE_RECT: {
+				const Item::CommandRect *crect = static_cast<const Item::CommandRect *>(c);
+				r = crect->rect;
+
+			} break;
+			case Item::Command::TYPE_NINEPATCH: {
+				const Item::CommandNinePatch *style = static_cast<const Item::CommandNinePatch *>(c);
+				r = style->rect;
+			} break;
+
+			case Item::Command::TYPE_POLYGON: {
+				const Item::CommandPolygon *polygon = static_cast<const Item::CommandPolygon *>(c);
+				r = polygon->polygon.rect_cache;
+			} break;
+			case Item::Command::TYPE_PRIMITIVE: {
+				const Item::CommandPrimitive *primitive = static_cast<const Item::CommandPrimitive *>(c);
+				for (uint32_t j = 0; j < primitive->point_count; j++) {
+					if (j == 0) {
+						r.position = primitive->points[0];
+					} else {
+						r.expand_to(primitive->points[j]);
+					}
+				}
+			} break;
+			case Item::Command::TYPE_MESH: {
+				const Item::CommandMesh *mesh = static_cast<const Item::CommandMesh *>(c);
+				AABB aabb = RSG::mesh_storage->mesh_get_aabb(mesh->mesh, RID());
+
+				r = Rect2(aabb.position.x, aabb.position.y, aabb.size.x, aabb.size.y);
+
+			} break;
+			case Item::Command::TYPE_MULTIMESH: {
+				const Item::CommandMultiMesh *multimesh = static_cast<const Item::CommandMultiMesh *>(c);
+				AABB aabb = RSG::mesh_storage->multimesh_get_aabb(multimesh->multimesh);
+
+				r = Rect2(aabb.position.x, aabb.position.y, aabb.size.x, aabb.size.y);
+
+			} break;
+			case Item::Command::TYPE_PARTICLES: {
+				const Item::CommandParticles *particles_cmd = static_cast<const Item::CommandParticles *>(c);
+				if (particles_cmd->particles.is_valid()) {
+					AABB aabb = RendererRD::ParticlesStorage::get_singleton()->particles_get_aabb(particles_cmd->particles);
+					r = Rect2(aabb.position.x, aabb.position.y, aabb.size.x, aabb.size.y);
+				}
+
+			} break;
+			case Item::Command::TYPE_TRANSFORM: {
+				const Item::CommandTransform *transform = static_cast<const Item::CommandTransform *>(c);
+				xf = transform->xform;
+				found_xform = true;
+				[[fallthrough]];
+			}
+			default: {
+				c = c->next;
+				continue;
+			}
+		}
+
+		if (found_xform) {
+			r = xf.xform(r);
+		}
+
+		if (first) {
+			rect = r;
+			first = false;
+		} else {
+			rect = rect.merge(r);
+		}
+		c = c->next;
+	}
+
+	rect_dirty = false;
+	return rect;
+}