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/***************************************************************************
*
* Copyright (c) 2015-2024 The Khronos Group Inc.
* Copyright (c) 2015-2024 Valve Corporation
* Copyright (c) 2015-2024 LunarG, Inc.
* Copyright (c) 2015-2024 Google Inc.
*
* SPDX-License-Identifier: Apache-2.0
*
****************************************************************************/
#pragma once
#include <vulkan/vulkan.h>
#include <cassert>
#include <cstdlib>
#include <cstring>
#include <functional>
#include <vector>
namespace vku {
// State that elements in a pNext chain may need to be aware of
struct PNextCopyState {
// Custom initialization function. Returns true if the structure passed to init was initialized, false otherwise
std::function<bool(VkBaseOutStructure* /* safe_sruct */, const VkBaseOutStructure* /* in_struct */)> init;
};
void* SafePnextCopy(const void* pNext, PNextCopyState* copy_state = {});
void FreePnextChain(const void* pNext);
char* SafeStringCopy(const char* in_string);
template <typename Base, typename T>
bool AddToPnext(Base& base, const T& data) {
assert(base.ptr()); // All safe struct have a ptr() method. Prevent use with non-safe structs.
auto** prev = reinterpret_cast<VkBaseOutStructure**>(const_cast<void**>(&base.pNext));
auto* current = *prev;
while (current) {
if (data.sType == current->sType) {
return false;
}
prev = reinterpret_cast<VkBaseOutStructure**>(¤t->pNext);
current = *prev;
}
*prev = reinterpret_cast<VkBaseOutStructure*>(SafePnextCopy(&data));
return true;
}
template <typename Base>
bool RemoveFromPnext(Base& base, VkStructureType t) {
assert(base.ptr()); // All safe struct have a ptr() method. Prevent use with non-safe structs.
auto** prev = reinterpret_cast<VkBaseOutStructure**>(const_cast<void**>(&base.pNext));
auto* current = *prev;
while (current) {
if (t == current->sType) {
*prev = current->pNext;
current->pNext = nullptr;
FreePnextChain(current);
return true;
}
prev = reinterpret_cast<VkBaseOutStructure**>(¤t->pNext);
current = *prev;
}
return false;
}
template <typename CreateInfo>
uint32_t FindExtension(CreateInfo& ci, const char* extension_name) {
assert(ci.ptr()); // All safe struct have a ptr() method. Prevent use with non-safe structs.
for (uint32_t i = 0; i < ci.enabledExtensionCount; i++) {
if (strcmp(ci.ppEnabledExtensionNames[i], extension_name) == 0) {
return i;
}
}
return ci.enabledExtensionCount;
}
template <typename CreateInfo>
bool AddExtension(CreateInfo& ci, const char* extension_name) {
assert(ci.ptr()); // All safe struct have a ptr() method. Prevent use with non-safe structs.
uint32_t pos = FindExtension(ci, extension_name);
if (pos < ci.enabledExtensionCount) {
// already present
return false;
}
char** exts = new char*[ci.enabledExtensionCount + 1];
if (ci.ppEnabledExtensionNames) {
memcpy(exts, ci.ppEnabledExtensionNames, sizeof(char*) * ci.enabledExtensionCount);
}
exts[ci.enabledExtensionCount] = SafeStringCopy(extension_name);
delete[] ci.ppEnabledExtensionNames;
ci.ppEnabledExtensionNames = exts;
ci.enabledExtensionCount++;
return true;
}
template <typename CreateInfo>
bool RemoveExtension(CreateInfo& ci, const char* extension_name) {
assert(ci.ptr()); // All safe struct have a ptr() method. Prevent use with non-safe structs.
uint32_t pos = FindExtension(ci, extension_name);
if (pos >= ci.enabledExtensionCount) {
// not present
return false;
}
if (ci.enabledExtensionCount == 1) {
delete[] ci.ppEnabledExtensionNames[0];
delete[] ci.ppEnabledExtensionNames;
ci.ppEnabledExtensionNames = nullptr;
ci.enabledExtensionCount = 0;
return true;
}
uint32_t out_pos = 0;
char** exts = new char*[ci.enabledExtensionCount - 1];
for (uint32_t i = 0; i < ci.enabledExtensionCount; i++) {
if (i == pos) {
delete[] ci.ppEnabledExtensionNames[i];
} else {
exts[out_pos++] = const_cast<char*>(ci.ppEnabledExtensionNames[i]);
}
}
delete[] ci.ppEnabledExtensionNames;
ci.ppEnabledExtensionNames = exts;
ci.enabledExtensionCount--;
return true;
}
} // namespace vku
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