vulkan: add an overlay layer

Just a starting point to display frame timings & drawcalls/submissions
per frame.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
+1-by: Mike Lothian <mike@fireburn.co.uk>
+1-by: Tapani Pälli <tapani.palli@intel.com>
+1-by: Eric Engestrom <eric.engestrom@intel.com>
+1-by: Yurii Kolesnykov <root@yurikoles.com>
+1-by: myfreeweb <greg@unrelenting.technology>
+1-by: Kenneth Graunke <kenneth@whitecape.org>

src/vulkan/overlay-layer/vk_layer_table.cpp

@@ -0,0 +1,146 @@
+/* Copyright (c) 2015-2016 The Khronos Group Inc.
+ * Copyright (c) 2015-2016 Valve Corporation
+ * Copyright (c) 2015-2016 LunarG, Inc.
+ * Copyright (c) 2015-2016 Google, Inc.
+ *
+ * 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.
+ *
+ * Author: Tobin Ehlis <tobin@lunarg.com>
+ */
+#include <assert.h>
+#include <unordered_map>
+#include "vk_dispatch_table_helper.h"
+#include "vulkan/vk_layer.h"
+#include "vk_layer_table.h"
+static device_table_map tableMap;
+static instance_table_map tableInstanceMap;
+
+// Map lookup must be thread safe
+VkLayerDispatchTable *device_dispatch_table(void *object) {
+    dispatch_key key = get_dispatch_key(object);
+    device_table_map::const_iterator it = tableMap.find((void *)key);
+    assert(it != tableMap.end() && "Not able to find device dispatch entry");
+    return it->second;
+}
+
+VkLayerInstanceDispatchTable *instance_dispatch_table(void *object) {
+    dispatch_key key = get_dispatch_key(object);
+    instance_table_map::const_iterator it = tableInstanceMap.find((void *)key);
+    assert(it != tableInstanceMap.end() && "Not able to find instance dispatch entry");
+    return it->second;
+}
+
+void destroy_dispatch_table(device_table_map &map, dispatch_key key) {
+    device_table_map::const_iterator it = map.find((void *)key);
+    if (it != map.end()) {
+        delete it->second;
+        map.erase(it);
+    }
+}
+
+void destroy_dispatch_table(instance_table_map &map, dispatch_key key) {
+    instance_table_map::const_iterator it = map.find((void *)key);
+    if (it != map.end()) {
+        delete it->second;
+        map.erase(it);
+    }
+}
+
+void destroy_device_dispatch_table(dispatch_key key) { destroy_dispatch_table(tableMap, key); }
+
+void destroy_instance_dispatch_table(dispatch_key key) { destroy_dispatch_table(tableInstanceMap, key); }
+
+VkLayerDispatchTable *get_dispatch_table(device_table_map &map, void *object) {
+    dispatch_key key = get_dispatch_key(object);
+    device_table_map::const_iterator it = map.find((void *)key);
+    assert(it != map.end() && "Not able to find device dispatch entry");
+    return it->second;
+}
+
+VkLayerInstanceDispatchTable *get_dispatch_table(instance_table_map &map, void *object) {
+    dispatch_key key = get_dispatch_key(object);
+    instance_table_map::const_iterator it = map.find((void *)key);
+    assert(it != map.end() && "Not able to find instance dispatch entry");
+    return it->second;
+}
+
+VkLayerInstanceCreateInfo *get_chain_info(const VkInstanceCreateInfo *pCreateInfo, VkLayerFunction func) {
+    VkLayerInstanceCreateInfo *chain_info = (VkLayerInstanceCreateInfo *)pCreateInfo->pNext;
+    while (chain_info && !(chain_info->sType == VK_STRUCTURE_TYPE_LOADER_INSTANCE_CREATE_INFO && chain_info->function == func)) {
+        chain_info = (VkLayerInstanceCreateInfo *)chain_info->pNext;
+    }
+    assert(chain_info != NULL);
+    return chain_info;
+}
+
+VkLayerDeviceCreateInfo *get_chain_info(const VkDeviceCreateInfo *pCreateInfo, VkLayerFunction func) {
+    VkLayerDeviceCreateInfo *chain_info = (VkLayerDeviceCreateInfo *)pCreateInfo->pNext;
+    while (chain_info && !(chain_info->sType == VK_STRUCTURE_TYPE_LOADER_DEVICE_CREATE_INFO && chain_info->function == func)) {
+        chain_info = (VkLayerDeviceCreateInfo *)chain_info->pNext;
+    }
+    assert(chain_info != NULL);
+    return chain_info;
+}
+
+/* Various dispatchable objects will use the same underlying dispatch table if they
+ * are created from that "parent" object. Thus use pointer to dispatch table
+ * as the key to these table maps.
+ *    Instance -> PhysicalDevice
+ *    Device -> CommandBuffer or Queue
+ * If use the object themselves as key to map then implies Create entrypoints have to be intercepted
+ * and a new key inserted into map */
+VkLayerInstanceDispatchTable *initInstanceTable(VkInstance instance, const PFN_vkGetInstanceProcAddr gpa, instance_table_map &map) {
+    VkLayerInstanceDispatchTable *pTable;
+    dispatch_key key = get_dispatch_key(instance);
+    instance_table_map::const_iterator it = map.find((void *)key);
+
+    if (it == map.end()) {
+        pTable = new VkLayerInstanceDispatchTable;
+        map[(void *)key] = pTable;
+    } else {
+        return it->second;
+    }
+
+    layer_init_instance_dispatch_table(instance, pTable, gpa);
+
+    // Setup func pointers that are required but not externally exposed.  These won't be added to the instance dispatch table by
+    // default.
+    pTable->GetPhysicalDeviceProcAddr = (PFN_GetPhysicalDeviceProcAddr)gpa(instance, "vk_layerGetPhysicalDeviceProcAddr");
+
+    return pTable;
+}
+
+VkLayerInstanceDispatchTable *initInstanceTable(VkInstance instance, const PFN_vkGetInstanceProcAddr gpa) {
+    return initInstanceTable(instance, gpa, tableInstanceMap);
+}
+
+VkLayerDispatchTable *initDeviceTable(VkDevice device, const PFN_vkGetDeviceProcAddr gpa, device_table_map &map) {
+    VkLayerDispatchTable *pTable;
+    dispatch_key key = get_dispatch_key(device);
+    device_table_map::const_iterator it = map.find((void *)key);
+
+    if (it == map.end()) {
+        pTable = new VkLayerDispatchTable;
+        map[(void *)key] = pTable;
+    } else {
+        return it->second;
+    }
+
+    layer_init_device_dispatch_table(device, pTable, gpa);
+
+    return pTable;
+}
+
+VkLayerDispatchTable *initDeviceTable(VkDevice device, const PFN_vkGetDeviceProcAddr gpa) {
+    return initDeviceTable(device, gpa, tableMap);
+}