[Vulkan] Untextured ImmediateDrawer, [D3D12] Small refactoring

src/xenia/ui/vulkan/vulkan_immediate_drawer.h

@@ -10,7 +10,10 @@
 #ifndef XENIA_UI_VULKAN_VULKAN_IMMEDIATE_DRAWER_H_
 #define XENIA_UI_VULKAN_VULKAN_IMMEDIATE_DRAWER_H_
 
+#include <memory>
+
 #include "xenia/ui/immediate_drawer.h"
+#include "xenia/ui/vulkan/vulkan_upload_buffer_pool.h"
 
 namespace xe {
 namespace ui {
@@ -21,6 +24,10 @@ class VulkanContext;
 class VulkanImmediateDrawer : public ImmediateDrawer {
  public:
   VulkanImmediateDrawer(VulkanContext& graphics_context);
+  ~VulkanImmediateDrawer() override;
+
+  bool Initialize();
+  void Shutdown();
 
   std::unique_ptr<ImmediateTexture> CreateTexture(uint32_t width,
                                                   uint32_t height,
@@ -36,7 +43,29 @@ class VulkanImmediateDrawer : public ImmediateDrawer {
   void End() override;
 
  private:
+  struct PushConstants {
+    struct Vertex {
+      float viewport_size_inv[2];
+    } vertex;
+  };
+
+  bool EnsurePipelinesCreated();
+
   VulkanContext& context_;
+
+  VkPipelineLayout pipeline_layout_ = VK_NULL_HANDLE;
+
+  std::unique_ptr<VulkanUploadBufferPool> vertex_buffer_pool_;
+
+  VkFormat pipeline_framebuffer_format_ = VK_FORMAT_UNDEFINED;
+  VkPipeline pipeline_triangle_ = VK_NULL_HANDLE;
+  VkPipeline pipeline_line_ = VK_NULL_HANDLE;
+
+  VkCommandBuffer current_command_buffer_ = VK_NULL_HANDLE;
+  VkExtent2D current_render_target_extent_;
+  VkPipeline current_pipeline_;
+  bool batch_open_ = false;
+  bool batch_has_index_buffer_;
 };
 
 }  // namespace vulkan