Add sample for VK_AMDX_dense_geometry_format

Author: stu-s

.gitmodules

@@ -53,3 +53,6 @@
 [submodule "third_party/opencl"]
 	path = third_party/opencl
 	url = https://github.com/KhronosGroup/OpenCL-Headers.git
+[submodule "third_party/DGF-SDK"]
+	path = third_party/DGF-SDK
+	url = https://github.com/GPUOpen-LibrariesAndSDKs/DGF-SDK.git

README.md

@@ -38,6 +38,19 @@ Navigate to the following paths to learn more:
   - [shaders/gpu_dispatch](./shaders/gpu_dispatch)
   - [shaders/gpu_draw_dispatch](./shaders/gpu_draw_dispatch)
 
+# Vulkan Dense Geometry Format sample <!-- omit in toc -->
+
+This branch adds a sample application for the `VK_AMDX_dense_geometry_format` extension that enables
+the use of pre-compressed Dense Geometry Format data to build acceleration structures.
+
+To build the sample, follow the standard build instructions.
+
+To run sample, execute with the arguments `sample dense_geometry_format`.
+
+Navigate to the following path to learn more:
+- Source code
+  - [samples/extensions/dense_geometry_format](./samples/extensions/dense_geometry_format)
+
 # Vulkan Samples <!-- omit in toc -->
 
 ![Vulkan Samples banner](banner.jpg)

assets_local/teapot.dgf

@@ -1,5 +1,6 @@
 /* Copyright (c) 2019-2021, Arm Limited and Contributors
- *
+ * Copyright (c) 2025 Advanced Micro Devices, Inc. All Rights Reserved.
+ * 
  * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 the "License";
@@ -23,7 +24,7 @@ namespace vkb
 {
 namespace core
 {
-Buffer::Buffer(Device const &device, VkDeviceSize size, VkBufferUsageFlags buffer_usage, VmaMemoryUsage memory_usage, VmaAllocationCreateFlags flags, const std::vector<uint32_t> &queue_family_indices) :
+Buffer::Buffer(Device const &device, VkDeviceSize size, VkBufferUsageFlags buffer_usage, VmaMemoryUsage memory_usage, VmaAllocationCreateFlags flags, const std::vector<uint32_t> &queue_family_indices, const void *pNext) :
     VulkanResource{VK_NULL_HANDLE, &device},
     size{size}
 {
@@ -36,6 +37,7 @@ Buffer::Buffer(Device const &device, VkDeviceSize size, VkBufferUsageFlags buffe
 	persistent = (flags & VMA_ALLOCATION_CREATE_MAPPED_BIT) != 0;
 
 	VkBufferCreateInfo buffer_info{VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO};
+	buffer_info.pNext = pNext;
 	buffer_info.usage = buffer_usage;
 	buffer_info.size  = size;
 	if (queue_family_indices.size() >= 2)

framework/core/buffer.cpp

@@ -1,4 +1,5 @@
 /* Copyright (c) 2019-2021, Arm Limited and Contributors
+ * Copyright (c) 2025 Advanced Micro Devices, Inc. All Rights Reserved.
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -44,7 +45,8 @@ class Buffer : public VulkanResource<VkBuffer, VK_OBJECT_TYPE_BUFFER, const Devi
 	       VkBufferUsageFlags           buffer_usage,
 	       VmaMemoryUsage               memory_usage,
 	       VmaAllocationCreateFlags     flags                = VMA_ALLOCATION_CREATE_MAPPED_BIT,
-	       const std::vector<uint32_t> &queue_family_indices = {});
+	       const std::vector<uint32_t> &queue_family_indices = {},
+	       const void                  *pNext = 0);
 
 	Buffer(const Buffer &) = delete;
 

framework/core/buffer.h

@@ -1,4 +1,5 @@
 # Copyright (c) 2019-2023, Arm Limited and Contributors
+# Copyright (c) 2025 Advanced Micro Devices, Inc. All Rights Reserved.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
@@ -83,6 +84,7 @@ set(ORDER_LIST
     "fragment_shader_barycentric"
     "gpu_dispatch"
     "gpu_draw_dispatch"
+    "dense_geometry_format"
 
     #Performance Samples
     "swapchain_images"

samples/CMakeLists.txt

@@ -0,0 +1,33 @@
+# Copyright (c) 2019-2021, Sascha Willems
+# Copyright (c) 2025 Advanced Micro Devices, Inc. All Rights Reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 the "License";
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+get_filename_component(FOLDER_NAME ${CMAKE_CURRENT_LIST_DIR} NAME)
+get_filename_component(PARENT_DIR ${CMAKE_CURRENT_LIST_DIR} PATH)
+get_filename_component(CATEGORY_NAME ${PARENT_DIR} NAME)
+
+add_sample_with_tags(
+    ID ${FOLDER_NAME}
+    CATEGORY ${CATEGORY_NAME}
+    AUTHOR "Advanced Micro Devices, Inc."
+    NAME "Dense Geometry Format"
+    DESCRIPTION "Basic example for using dense geometry format data in ray tracing"
+    LIBS DGFLib
+    SHADER_FILES_GLSL
+        "dense_geometry_format/raygen.rgen"
+        "dense_geometry_format/miss.rmiss"
+        "dense_geometry_format/closesthit.rchit")

samples/extensions/dense_geometry_format/CMakeLists.txt

@@ -0,0 +1,23 @@
+<!--
+- Copyright (c) 2020-2023, The Khronos Group 
+-
+- SPDX-License-Identifier: Apache-2.0
+-
+- Licensed under the Apache License, Version 2.0 the "License";
+- you may not use this file except in compliance with the License.
+- You may obtain a copy of the License at
+-
+-     http://www.apache.org/licenses/LICENSE-2.0
+-
+- Unless required by applicable law or agreed to in writing, software
+- distributed under the License is distributed on an "AS IS" BASIS,
+- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+- See the License for the specific language governing permissions and
+- limitations under the License.
+-
+-->
+### Basic hardware accelerated ray tracing
+
+**Extensions**: [```VK_KHR_ray_tracing_pipeline```](https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#VK_KHR_ray_tracing_pipeline), [```VK_KHR_acceleration_structure```](https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/vkspec.html#VK_KHR_acceleration_structure)
+
+Render a basic scene using the official cross-vendor ray tracing extension. Shows how to setup all data structures required for ray tracing, including the bottom and top level acceleration structures for the geometry, the shader binding table and the ray tracing pipelines with shader groups for ray generation, ray hits, and ray misses. After dispatching the rays, the final result is copied to the swapchain image.