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Add ability to simulate a few kinds of Vulkan initialization failures…

…, to test the GL fallback.
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hrydgard committed Nov 26, 2017
1 parent 234f30a commit b9bad7431a3e7de6f5204c260384caf3b9938679
Showing with 20 additions and 0 deletions.
  1. +20 −0 Common/Vulkan/VulkanContext.cpp
@@ -10,6 +10,10 @@
#include "GPU/Common/ShaderCommon.h"
#include "Common/StringUtils.h"
// Change this to 1, 2, and 3 to fake failures in a few places, so that
// we can test our fallback-to-GL code.
#define SIMULATE_VULKAN_FAILURE 0
#ifdef USE_CRT_DBG
#undef new
#endif
@@ -76,6 +80,9 @@ const char *PresentModeString(VkPresentModeKHR presentMode) {
}
VulkanContext::VulkanContext() {
#if SIMULATE_VULKAN_FAILURE == 1
return;
#endif
if (!VulkanLoad()) {
init_error_ = "Failed to load Vulkan driver library";
// No DLL?
@@ -89,6 +96,11 @@ VulkanContext::VulkanContext() {
}
VkResult VulkanContext::CreateInstance(const char *app_name, int app_ver, uint32_t flags) {
if (!vkCreateInstance) {
init_error_ = "Vulkan not loaded - can't create instance";
return VK_ERROR_INITIALIZATION_FAILED;
}
flags_ = flags;
// List extensions to try to enable.
@@ -123,7 +135,11 @@ VkResult VulkanContext::CreateInstance(const char *app_name, int app_ver, uint32
inst_info.enabledExtensionCount = (uint32_t)instance_extensions_enabled_.size();
inst_info.ppEnabledExtensionNames = instance_extensions_enabled_.size() ? instance_extensions_enabled_.data() : nullptr;
#if SIMULATE_VULKAN_FAILURE == 2
VkResult res = VK_ERROR_INCOMPATIBLE_DRIVER;
#else
VkResult res = vkCreateInstance(&inst_info, nullptr, &instance_);
#endif
if (res != VK_SUCCESS) {
if (res == VK_ERROR_LAYER_NOT_PRESENT) {
WLOG("Validation on but layers not available - dropping layers");
@@ -152,7 +168,11 @@ VkResult VulkanContext::CreateInstance(const char *app_name, int app_ver, uint32
}
uint32_t gpu_count = 1;
#if SIMULATE_VULKAN_FAILURE == 3
gpu_count = 0;
#else
res = vkEnumeratePhysicalDevices(instance_, &gpu_count, nullptr);
#endif
if (gpu_count <= 0) {
ELOG("Vulkan driver found but no supported GPU is available");
init_error_ = "No Vulkan physical devices found";

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