Try Vulkan renderer first, fallback to OpenGL if it fails.

src/engine/engine.cc

@@ -507,10 +507,7 @@ std::unique_ptr<Image> Engine::PrintStats() {
   line = "fps: ";
   line += std::to_string(fps_);
   lines.push_back(line);
-  // line = "cmd: ";
-  // line += std::to_string(renderer_->global_queue_size() +
-  //                        renderer_->render_queue_size());
-  // lines.push_back(line);
+  lines.push_back(renderer_->GetDebugName());
 
   constexpr int margin = 5;
   int line_height = system_font_->GetLineHeight();

src/engine/platform/platform.cc

@@ -7,8 +7,6 @@
 #include "engine/renderer/opengl/renderer_opengl.h"
 #include "engine/renderer/vulkan/renderer_vulkan.h"
 
-#define USE_VULKAN_RENDERER 1
-
 using namespace base;
 
 namespace eng {
@@ -31,11 +29,13 @@ void Platform::InitializeCommon() {
     throw internal_error;
   }
 
-#if (USE_VULKAN_RENDERER == 1)
-  renderer_ = std::make_unique<RendererVulkan>();
-#else
-  renderer_ = std::make_unique<RendererOpenGL>();
-#endif
+  auto context = std::make_unique<VulkanContext>();
+  if (context->Initialize()) {
+    renderer_ = std::make_unique<RendererVulkan>(std::move(context));
+  } else {
+    LOG << "Failed to initialize Vulkan context. Fallback to OpenGL.";
+    renderer_ = std::make_unique<RendererOpenGL>();
+  }
 }
 
 void Platform::ShutdownCommon() {

src/engine/renderer/opengl/renderer_opengl.h

@@ -87,6 +87,8 @@ class RendererOpenGL final : public Renderer {
 
   size_t GetAndResetFPS() final;
 
+  const char* GetDebugName() final { return "OpenGL"; }
+
 #if defined(__linux__) && !defined(__ANDROID__)
   XVisualInfo* GetXVisualInfo(Display* display) final;
 #endif

src/engine/renderer/renderer.h

@@ -92,6 +92,8 @@ class Renderer {
 
   virtual size_t GetAndResetFPS() = 0;
 
+  virtual const char* GetDebugName() = 0;
+
 #if defined(__linux__) && !defined(__ANDROID__)
   virtual XVisualInfo* GetXVisualInfo(Display* display) = 0;
 #endif

src/engine/renderer/vulkan/renderer_vulkan.cc

@@ -370,7 +370,8 @@ std::pair<int, int> GetNumBlocksForImageFormat(VkFormat format,
 
 namespace eng {
 
-RendererVulkan::RendererVulkan() = default;
+RendererVulkan::RendererVulkan(std::unique_ptr<VulkanContext> context)
+    : context_{std::move(context)} {}
 
 RendererVulkan::~RendererVulkan() = default;
 
@@ -706,7 +707,7 @@ uint64_t RendererVulkan::CreateShader(
   pipeline_info.pDepthStencilState = &depth_stencil;
   pipeline_info.pDynamicState = &dynamic_state_create_info;
   pipeline_info.layout = shader.pipeline_layout;
-  pipeline_info.renderPass = context_.GetRenderPass();
+  pipeline_info.renderPass = context_->GetRenderPass();
   pipeline_info.subpass = 0;
   pipeline_info.basePipelineHandle = VK_NULL_HANDLE;
 
@@ -827,7 +828,7 @@ void RendererVulkan::UploadUniforms(uint64_t resource_id) {
 }
 
 void RendererVulkan::PrepareForDrawing() {
-  context_.PrepareBuffers();
+  context_->PrepareBuffers();
   DrawListBegin();
 }
 
@@ -839,20 +840,20 @@ void RendererVulkan::Present() {
 bool RendererVulkan::InitializeInternal() {
   glslang::InitializeProcess();
 
-  device_ = context_.GetDevice();
+  device_ = context_->GetDevice();
 
   // Allocate one extra frame to ensure it's unused at any time without having
   // to use a fence.
-  int frame_count = context_.GetSwapchainImageCount() + 1;
+  int frame_count = context_->GetSwapchainImageCount() + 1;
   frames_.resize(frame_count);
   frames_drawn_ = frame_count;
 
   // Initialize allocator
   VmaAllocatorCreateInfo allocator_info;
   memset(&allocator_info, 0, sizeof(VmaAllocatorCreateInfo));
-  allocator_info.physicalDevice = context_.GetPhysicalDevice();
+  allocator_info.physicalDevice = context_->GetPhysicalDevice();
   allocator_info.device = device_;
-  allocator_info.instance = context_.GetInstance();
+  allocator_info.instance = context_->GetInstance();
   vmaCreateAllocator(&allocator_info, &allocator_);
 
   for (size_t i = 0; i < frames_.size(); i++) {
@@ -860,7 +861,7 @@ bool RendererVulkan::InitializeInternal() {
     VkCommandPoolCreateInfo cmd_pool_info;
     cmd_pool_info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
     cmd_pool_info.pNext = nullptr;
-    cmd_pool_info.queueFamilyIndex = context_.GetGraphicsQueue();
+    cmd_pool_info.queueFamilyIndex = context_->GetGraphicsQueue();
     cmd_pool_info.flags = 0;
 
     VkResult err = vkCreateCommandPool(device_, &cmd_pool_info, nullptr,
@@ -1013,8 +1014,8 @@ void RendererVulkan::Shutdown() {
   current_staging_buffer_ = 0;
   staging_buffer_used_ = false;
 
-  context_.DestroyWindow();
-  context_.Shutdown();
+  context_->DestroyWindow();
+  context_->Shutdown();
 
   glslang::FinalizeProcess();
 }
@@ -1022,8 +1023,8 @@ void RendererVulkan::Shutdown() {
 void RendererVulkan::BeginFrame() {
   FreePendingResources(current_frame_);
 
-  context_.AppendCommandBuffer(frames_[current_frame_].setup_command_buffer);
-  context_.AppendCommandBuffer(frames_[current_frame_].draw_command_buffer);
+  context_->AppendCommandBuffer(frames_[current_frame_].setup_command_buffer);
+  context_->AppendCommandBuffer(frames_[current_frame_].draw_command_buffer);
 
   vkResetCommandPool(device_, frames_[current_frame_].setup_command_pool, 0);
   vkResetCommandPool(device_, frames_[current_frame_].draw_command_pool, 0);
@@ -1062,7 +1063,7 @@ void RendererVulkan::BeginFrame() {
 void RendererVulkan::FlushSetupBuffer() {
   vkEndCommandBuffer(frames_[current_frame_].setup_command_buffer);
 
-  context_.Flush(false);
+  context_->Flush(false);
 
   vkResetCommandPool(device_, frames_[current_frame_].setup_command_pool, 0);
 
@@ -1078,8 +1079,8 @@ void RendererVulkan::FlushSetupBuffer() {
     DLOG << "vkBeginCommandBuffer failed with error " << string_VkResult(err);
     return;
   }
-  context_.AppendCommandBuffer(frames_[current_frame_].setup_command_buffer,
-                               true);
+  context_->AppendCommandBuffer(frames_[current_frame_].setup_command_buffer,
+                                true);
 }
 
 void RendererVulkan::FreePendingResources(int frame) {
@@ -1906,8 +1907,8 @@ void RendererVulkan::DrawListBegin() {
   VkRenderPassBeginInfo render_pass_begin;
   render_pass_begin.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
   render_pass_begin.pNext = nullptr;
-  render_pass_begin.renderPass = context_.GetRenderPass();
-  render_pass_begin.framebuffer = context_.GetFramebuffer();
+  render_pass_begin.renderPass = context_->GetRenderPass();
+  render_pass_begin.framebuffer = context_->GetFramebuffer();
 
   render_pass_begin.renderArea.extent.width = screen_width_;
   render_pass_begin.renderArea.extent.height = screen_height_;
@@ -1973,7 +1974,7 @@ void RendererVulkan::SwapBuffers() {
   vkEndCommandBuffer(frames_[current_frame_].setup_command_buffer);
   vkEndCommandBuffer(frames_[current_frame_].draw_command_buffer);
 
-  context_.SwapBuffers();
+  context_->SwapBuffers();
   current_frame_ = (current_frame_ + 1) % frames_.size();
 
   active_pipeline_ = VK_NULL_HANDLE;
@@ -2032,13 +2033,13 @@ bool RendererVulkan::SetUniformInternal(ShaderVulkan& shader,
 
 bool RendererVulkan::IsFormatSupported(VkFormat format) {
   VkFormatProperties properties;
-  vkGetPhysicalDeviceFormatProperties(context_.GetPhysicalDevice(), format,
+  vkGetPhysicalDeviceFormatProperties(context_->GetPhysicalDevice(), format,
                                       &properties);
   return properties.optimalTilingFeatures & VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT;
 }
 
 size_t RendererVulkan::GetAndResetFPS() {
-  return context_.GetAndResetFPS();
+  return context_->GetAndResetFPS();
 }
 
 void RendererVulkan::DestroyAllResources() {

src/engine/renderer/vulkan/renderer_vulkan.h

@@ -22,7 +22,7 @@ class Image;
 
 class RendererVulkan final : public Renderer {
  public:
-  RendererVulkan();
+  RendererVulkan(std::unique_ptr<VulkanContext> context);
   ~RendererVulkan() final;
 
 #if defined(__ANDROID__)
@@ -72,6 +72,8 @@ class RendererVulkan final : public Renderer {
 
   size_t GetAndResetFPS() final;
 
+  const char* GetDebugName() final { return "Vulkan"; }
+
 #if defined(__linux__) && !defined(__ANDROID__)
   XVisualInfo* GetXVisualInfo(Display* display) final;
 #endif
@@ -154,7 +156,7 @@ class RendererVulkan final : public Renderer {
 
   bool context_lost_ = false;
 
-  VulkanContext context_;
+  std::unique_ptr<VulkanContext> context_;
 
   VmaAllocator allocator_ = nullptr;
 

src/engine/renderer/vulkan/renderer_vulkan_android.cc

@@ -12,11 +12,7 @@ bool RendererVulkan::Initialize(ANativeWindow* window) {
   screen_width_ = ANativeWindow_getWidth(window);
   screen_height_ = ANativeWindow_getHeight(window);
 
-  if (!context_.Initialize()) {
-    LOG << "Failed to initialize Vulkan context.";
-    return false;
-  }
-  if (!context_.CreateWindow(window, screen_width_, screen_height_)) {
+  if (!context_->CreateWindow(window, screen_width_, screen_height_)) {
     LOG << "Vulkan context failed to create window.";
     return false;
   }

src/engine/renderer/vulkan/renderer_vulkan_linux.cc

@@ -12,11 +12,7 @@ bool RendererVulkan::Initialize(Display* display, Window window) {
   screen_width_ = xwa.width;
   screen_height_ = xwa.height;
 
-  if (!context_.Initialize()) {
-    LOG << "Failed to initialize Vulkan context.";
-    return false;
-  }
-  if (!context_.CreateWindow(display, window, screen_width_, screen_height_)) {
+  if (!context_->CreateWindow(display, window, screen_width_, screen_height_)) {
     LOG << "Vulkan context failed to create window.";
     return false;
   }