dolphin/Source/Core/VideoBackends/Vulkan/FramebufferManager.cpp

// Copyright 2016 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#include "VideoBackends/Vulkan/FramebufferManager.h"

#include <algorithm>
#include <cstddef>

#include "Common/Assert.h"
#include "Common/CommonFuncs.h"
#include "Common/Logging/Log.h"
#include "Common/MsgHandler.h"

#include "Core/HW/Memmap.h"

#include "VideoBackends/Vulkan/CommandBufferManager.h"
#include "VideoBackends/Vulkan/ObjectCache.h"
#include "VideoBackends/Vulkan/StateTracker.h"
#include "VideoBackends/Vulkan/StreamBuffer.h"
#include "VideoBackends/Vulkan/Texture2D.h"
#include "VideoBackends/Vulkan/Util.h"
#include "VideoBackends/Vulkan/VKTexture.h"
#include "VideoBackends/Vulkan/VertexFormat.h"
#include "VideoBackends/Vulkan/VulkanContext.h"

#include "VideoCommon/RenderBase.h"
#include "VideoCommon/VideoConfig.h"

namespace Vulkan
{
// Maximum number of pixels poked in one batch * 6
constexpr size_t MAX_POKE_VERTICES = 8192;
constexpr size_t POKE_VERTEX_BUFFER_SIZE = 8 * 1024 * 1024;

FramebufferManager::FramebufferManager()
{
}

FramebufferManager::~FramebufferManager()
{
  DestroyEFBFramebuffer();

  DestroyConversionShaders();

  DestroyReadbackFramebuffer();
  DestroyReadbackTextures();
  DestroyReadbackShaders();

  DestroyPokeVertexBuffer();
  DestroyPokeShaders();
}

FramebufferManager* FramebufferManager::GetInstance()
{
  return static_cast<FramebufferManager*>(g_framebuffer_manager.get());
}

u32 FramebufferManager::GetEFBWidth() const
{
  return m_efb_color_texture->GetWidth();
}

u32 FramebufferManager::GetEFBHeight() const
{
  return m_efb_color_texture->GetHeight();
}

u32 FramebufferManager::GetEFBLayers() const
{
  return m_efb_color_texture->GetLayers();
}

VkSampleCountFlagBits FramebufferManager::GetEFBSamples() const
{
  return m_efb_color_texture->GetSamples();
}

MultisamplingState FramebufferManager::GetEFBMultisamplingState() const
{
  MultisamplingState ms = {};
  ms.per_sample_shading = g_ActiveConfig.MultisamplingEnabled() && g_ActiveConfig.bSSAA;
  ms.samples = static_cast<u32>(GetEFBSamples());
  return ms;
}

bool FramebufferManager::Initialize()
{
  if (!CreateEFBRenderPasses())
  {
    PanicAlert("Failed to create EFB render pass");
    return false;
  }
  if (!CreateEFBFramebuffer())
  {
    PanicAlert("Failed to create EFB textures");
    return false;
  }

  if (!CompileConversionShaders())
  {
    PanicAlert("Failed to compile EFB shaders");
    return false;
  }

  if (!CreateReadbackRenderPasses())
  {
    PanicAlert("Failed to create readback render passes");
    return false;
  }
  if (!CompileReadbackShaders())
  {
    PanicAlert("Failed to compile readback shaders");
    return false;
  }
  if (!CreateReadbackTextures())
  {
    PanicAlert("Failed to create readback textures");
    return false;
  }
  if (!CreateReadbackFramebuffer())
  {
    PanicAlert("Failed to create readback framebuffer");
    return false;
  }

  CreatePokeVertexFormat();
  if (!CreatePokeVertexBuffer())
  {
    PanicAlert("Failed to create poke vertex buffer");
    return false;
  }

  if (!CompilePokeShaders())
  {
    PanicAlert("Failed to compile poke shaders");
    return false;
  }

  return true;
}

bool FramebufferManager::CreateEFBRenderPasses()
{
  m_efb_load_render_pass =
      g_object_cache->GetRenderPass(EFB_COLOR_TEXTURE_FORMAT, EFB_DEPTH_TEXTURE_FORMAT,
                                    g_ActiveConfig.iMultisamples, VK_ATTACHMENT_LOAD_OP_LOAD);
  m_efb_clear_render_pass =
      g_object_cache->GetRenderPass(EFB_COLOR_TEXTURE_FORMAT, EFB_DEPTH_TEXTURE_FORMAT,
                                    g_ActiveConfig.iMultisamples, VK_ATTACHMENT_LOAD_OP_CLEAR);
  m_depth_resolve_render_pass = g_object_cache->GetRenderPass(
      EFB_DEPTH_AS_COLOR_TEXTURE_FORMAT, VK_FORMAT_UNDEFINED, 1, VK_ATTACHMENT_LOAD_OP_DONT_CARE);
  return m_efb_load_render_pass != VK_NULL_HANDLE && m_efb_clear_render_pass != VK_NULL_HANDLE &&
         m_depth_resolve_render_pass != VK_NULL_HANDLE;
}

bool FramebufferManager::CreateEFBFramebuffer()
{
  u32 efb_width = static_cast<u32>(std::max(g_renderer->GetTargetWidth(), 1));
  u32 efb_height = static_cast<u32>(std::max(g_renderer->GetTargetHeight(), 1));
  u32 efb_layers = (g_ActiveConfig.stereo_mode != StereoMode::Off) ? 2 : 1;
  VkSampleCountFlagBits efb_samples =
      static_cast<VkSampleCountFlagBits>(g_ActiveConfig.iMultisamples);
  INFO_LOG(VIDEO, "EFB size: %ux%ux%u", efb_width, efb_height, efb_layers);

  // Update the static variable in the base class. Why does this even exist?
  FramebufferManagerBase::m_EFBLayers = efb_layers;

  // Allocate EFB render targets
  m_efb_color_texture =
      Texture2D::Create(efb_width, efb_height, 1, efb_layers, EFB_COLOR_TEXTURE_FORMAT, efb_samples,
                        VK_IMAGE_VIEW_TYPE_2D_ARRAY, VK_IMAGE_TILING_OPTIMAL,
                        VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT |
                            VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT);

  // We need a second texture to swap with for changing pixel formats
  m_efb_convert_color_texture =
      Texture2D::Create(efb_width, efb_height, 1, efb_layers, EFB_COLOR_TEXTURE_FORMAT, efb_samples,
                        VK_IMAGE_VIEW_TYPE_2D_ARRAY, VK_IMAGE_TILING_OPTIMAL,
                        VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT |
                            VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT);

  m_efb_depth_texture = Texture2D::Create(
      efb_width, efb_height, 1, efb_layers, EFB_DEPTH_TEXTURE_FORMAT, efb_samples,
      VK_IMAGE_VIEW_TYPE_2D_ARRAY, VK_IMAGE_TILING_OPTIMAL,
      VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT |
          VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT);

  if (!m_efb_color_texture || !m_efb_convert_color_texture || !m_efb_depth_texture)
    return false;

  // Create resolved textures if MSAA is on
  if (g_ActiveConfig.MultisamplingEnabled())
  {
    m_efb_resolve_color_texture = Texture2D::Create(
        efb_width, efb_height, 1, efb_layers, EFB_COLOR_TEXTURE_FORMAT, VK_SAMPLE_COUNT_1_BIT,
        VK_IMAGE_VIEW_TYPE_2D_ARRAY, VK_IMAGE_TILING_OPTIMAL,
        VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT |
            VK_IMAGE_USAGE_SAMPLED_BIT);

    m_efb_resolve_depth_texture = Texture2D::Create(
        efb_width, efb_height, 1, efb_layers, EFB_DEPTH_AS_COLOR_TEXTURE_FORMAT,
        VK_SAMPLE_COUNT_1_BIT, VK_IMAGE_VIEW_TYPE_2D_ARRAY, VK_IMAGE_TILING_OPTIMAL,
        VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT |
            VK_IMAGE_USAGE_SAMPLED_BIT);

    if (!m_efb_resolve_color_texture || !m_efb_resolve_depth_texture)
      return false;

    VkImageView attachment = m_efb_resolve_depth_texture->GetView();
    VkFramebufferCreateInfo framebuffer_info = {VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO,
                                                nullptr,
                                                0,
                                                m_depth_resolve_render_pass,
                                                1,
                                                &attachment,
                                                efb_width,
                                                efb_height,
                                                efb_layers};

    VkResult res = vkCreateFramebuffer(g_vulkan_context->GetDevice(), &framebuffer_info, nullptr,
                                       &m_depth_resolve_framebuffer);
    if (res != VK_SUCCESS)
    {
      LOG_VULKAN_ERROR(res, "vkCreateFramebuffer failed: ");
      return false;
    }
  }

  VkImageView framebuffer_attachments[] = {
      m_efb_color_texture->GetView(),
      m_efb_depth_texture->GetView(),
  };

  VkFramebufferCreateInfo framebuffer_info = {VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO,
                                              nullptr,
                                              0,
                                              m_efb_load_render_pass,
                                              static_cast<u32>(ArraySize(framebuffer_attachments)),
                                              framebuffer_attachments,
                                              efb_width,
                                              efb_height,
                                              efb_layers};

  VkResult res = vkCreateFramebuffer(g_vulkan_context->GetDevice(), &framebuffer_info, nullptr,
                                     &m_efb_framebuffer);
  if (res != VK_SUCCESS)
  {
    LOG_VULKAN_ERROR(res, "vkCreateFramebuffer failed: ");
    return false;
  }

  // Create second framebuffer for format conversions
  framebuffer_attachments[0] = m_efb_convert_color_texture->GetView();
  res = vkCreateFramebuffer(g_vulkan_context->GetDevice(), &framebuffer_info, nullptr,
                            &m_efb_convert_framebuffer);
  if (res != VK_SUCCESS)
  {
    LOG_VULKAN_ERROR(res, "vkCreateFramebuffer failed: ");
    return false;
  }

  // Transition to state that can be used to clear
  m_efb_color_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                          VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);
  m_efb_convert_color_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                                  VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);
  m_efb_depth_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                          VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);

  // Clear the contents of the buffers.
  static const VkClearColorValue clear_color = {{0.0f, 0.0f, 0.0f, 0.0f}};
  static const VkClearDepthStencilValue clear_depth = {0.0f, 0};
  VkImageSubresourceRange clear_color_range = {VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, efb_layers};
  VkImageSubresourceRange clear_depth_range = {VK_IMAGE_ASPECT_DEPTH_BIT, 0, 1, 0, efb_layers};
  vkCmdClearColorImage(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                       m_efb_color_texture->GetImage(), VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
                       &clear_color, 1, &clear_color_range);
  vkCmdClearColorImage(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                       m_efb_convert_color_texture->GetImage(),
                       VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, &clear_color, 1, &clear_color_range);
  vkCmdClearDepthStencilImage(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                              m_efb_depth_texture->GetImage(), VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
                              &clear_depth, 1, &clear_depth_range);

  // Transition to color attachment state ready for rendering.
  m_efb_color_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                          VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
  m_efb_depth_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                          VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL);

  return true;
}

void FramebufferManager::DestroyEFBFramebuffer()
{
  if (m_efb_framebuffer != VK_NULL_HANDLE)
  {
    vkDestroyFramebuffer(g_vulkan_context->GetDevice(), m_efb_framebuffer, nullptr);
    m_efb_framebuffer = VK_NULL_HANDLE;
  }

  if (m_efb_convert_framebuffer != VK_NULL_HANDLE)
  {
    vkDestroyFramebuffer(g_vulkan_context->GetDevice(), m_efb_convert_framebuffer, nullptr);
    m_efb_convert_framebuffer = VK_NULL_HANDLE;
  }

  if (m_depth_resolve_framebuffer != VK_NULL_HANDLE)
  {
    vkDestroyFramebuffer(g_vulkan_context->GetDevice(), m_depth_resolve_framebuffer, nullptr);
    m_depth_resolve_framebuffer = VK_NULL_HANDLE;
  }

  m_efb_color_texture.reset();
  m_efb_convert_color_texture.reset();
  m_efb_depth_texture.reset();
  m_efb_resolve_color_texture.reset();
  m_efb_resolve_depth_texture.reset();
}

void FramebufferManager::RecreateEFBFramebuffer()
{
  DestroyEFBFramebuffer();

  if (!CreateEFBRenderPasses())
    PanicAlert("Failed to create EFB render pass");

  if (!CreateEFBFramebuffer())
    PanicAlert("Failed to create EFB textures");
}

void FramebufferManager::RecompileShaders()
{
  DestroyConversionShaders();

  if (!CompileConversionShaders())
    PanicAlert("Failed to compile EFB shaders");

  DestroyReadbackShaders();
  if (!CompileReadbackShaders())
    PanicAlert("Failed to compile readback shaders");
}

void FramebufferManager::ReinterpretPixelData(int convtype)
{
  VkShaderModule pixel_shader = VK_NULL_HANDLE;
  if (convtype == 0)
  {
    pixel_shader = m_ps_rgb8_to_rgba6;
  }
  else if (convtype == 2)
  {
    pixel_shader = m_ps_rgba6_to_rgb8;
  }
  else
  {
    ERROR_LOG(VIDEO, "Unhandled reinterpret pixel data %d", convtype);
    return;
  }

  // Transition EFB color buffer to shader resource, and the convert buffer to color attachment.
  m_efb_color_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                          VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
  m_efb_convert_color_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                                  VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);

  UtilityShaderDraw draw(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                         g_object_cache->GetPipelineLayout(PIPELINE_LAYOUT_STANDARD),
                         m_efb_load_render_pass, g_shader_cache->GetScreenQuadVertexShader(),
                         g_shader_cache->GetScreenQuadGeometryShader(), pixel_shader);

  VkRect2D region = {{0, 0}, {GetEFBWidth(), GetEFBHeight()}};
  draw.SetMultisamplingState(GetEFBMultisamplingState());
  draw.BeginRenderPass(m_efb_convert_framebuffer, region);
  draw.SetPSSampler(0, m_efb_color_texture->GetView(), g_object_cache->GetPointSampler());
  draw.SetViewportAndScissor(0, 0, GetEFBWidth(), GetEFBHeight());
  draw.DrawWithoutVertexBuffer(4);
  draw.EndRenderPass();

  // Swap EFB texture pointers
  std::swap(m_efb_color_texture, m_efb_convert_color_texture);
  std::swap(m_efb_framebuffer, m_efb_convert_framebuffer);
}

Texture2D* FramebufferManager::ResolveEFBColorTexture(const VkRect2D& region)
{
  // Return the normal EFB texture if multisampling is off.
  if (GetEFBSamples() == VK_SAMPLE_COUNT_1_BIT)
    return m_efb_color_texture.get();

  // Can't resolve within a render pass.
  StateTracker::GetInstance()->EndRenderPass();

  // It's not valid to resolve out-of-bounds coordinates.
  // Ensuring the region is within the image is the caller's responsibility.
  ASSERT(region.offset.x >= 0 && region.offset.y >= 0 &&
         (static_cast<u32>(region.offset.x) + region.extent.width) <= GetEFBWidth() &&
         (static_cast<u32>(region.offset.y) + region.extent.height) <= GetEFBHeight());

  // Resolving is considered to be a transfer operation.
  m_efb_color_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                          VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
  m_efb_resolve_color_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                                  VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);

  // Resolve to our already-created texture.
  VkImageResolve resolve = {
      {VK_IMAGE_ASPECT_COLOR_BIT, 0, 0, GetEFBLayers()},  // VkImageSubresourceLayers srcSubresource
      {region.offset.x, region.offset.y, 0},              // VkOffset3D                  srcOffset
      {VK_IMAGE_ASPECT_COLOR_BIT, 0, 0, GetEFBLayers()},  // VkImageSubresourceLayers dstSubresource
      {region.offset.x, region.offset.y, 0},              // VkOffset3D                  dstOffset
      {region.extent.width, region.extent.height, GetEFBLayers()}  // VkExtent3D extent
  };
  vkCmdResolveImage(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                    m_efb_color_texture->GetImage(), VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
                    m_efb_resolve_color_texture->GetImage(), VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
                    1, &resolve);

  // Restore MSAA texture ready for rendering again
  m_efb_color_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                          VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
  return m_efb_resolve_color_texture.get();
}

Texture2D* FramebufferManager::ResolveEFBDepthTexture(const VkRect2D& region)
{
  // Return the normal EFB texture if multisampling is off.
  if (GetEFBSamples() == VK_SAMPLE_COUNT_1_BIT)
    return m_efb_depth_texture.get();

  // Can't resolve within a render pass.
  StateTracker::GetInstance()->EndRenderPass();

  m_efb_depth_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                          VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
  m_efb_resolve_depth_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                                  VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);

  // Draw using resolve shader to write the minimum depth of all samples to the resolve texture.
  UtilityShaderDraw draw(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                         g_object_cache->GetPipelineLayout(PIPELINE_LAYOUT_STANDARD),
                         m_depth_resolve_render_pass, g_shader_cache->GetScreenQuadVertexShader(),
                         g_shader_cache->GetScreenQuadGeometryShader(), m_ps_depth_resolve);
  draw.BeginRenderPass(m_depth_resolve_framebuffer, region);
  draw.SetPSSampler(0, m_efb_depth_texture->GetView(), g_object_cache->GetPointSampler());
  draw.SetViewportAndScissor(region.offset.x, region.offset.y, region.extent.width,
                             region.extent.height);
  draw.DrawWithoutVertexBuffer(4);
  draw.EndRenderPass();

  // Restore MSAA texture ready for rendering again
  m_efb_depth_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                          VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL);

  return m_efb_resolve_depth_texture.get();
}

bool FramebufferManager::CompileConversionShaders()
{
  static const char RGB8_TO_RGBA6_SHADER_SOURCE[] = R"(
    #if MSAA_ENABLED
      SAMPLER_BINDING(0) uniform sampler2DMSArray samp0;
    #else
      SAMPLER_BINDING(0) uniform sampler2DArray samp0;
    #endif
    layout(location = 0) in vec3 uv0;
    layout(location = 0) out vec4 ocol0;

    void main()
    {
      int layer = 0;
      #if EFB_LAYERS > 1
        layer = int(uv0.z);
      #endif

      ivec3 coords = ivec3(gl_FragCoord.xy, layer);

      vec4 val;
      #if !MSAA_ENABLED
        // No MSAA - just load the first (and only) sample
        val = texelFetch(samp0, coords, 0);
      #elif SSAA_ENABLED
        // Sample shading, shader runs once per sample
        val = texelFetch(samp0, coords, gl_SampleID);
      #else
        // MSAA without sample shading, average out all samples.
        val = vec4(0, 0, 0, 0);
        for (int i = 0; i < MSAA_SAMPLES; i++)
          val += texelFetch(samp0, coords, i);
        val /= float(MSAA_SAMPLES);
      #endif

      ivec4 src8 = ivec4(round(val * 255.f));
      ivec4 dst6;
      dst6.r = src8.r >> 2;
      dst6.g = ((src8.r & 0x3) << 4) | (src8.g >> 4);
      dst6.b = ((src8.g & 0xF) << 2) | (src8.b >> 6);
      dst6.a = src8.b & 0x3F;

      ocol0 = float4(dst6) / 63.f;
    }
  )";

  static const char RGBA6_TO_RGB8_SHADER_SOURCE[] = R"(
    #if MSAA_ENABLED
      SAMPLER_BINDING(0) uniform sampler2DMSArray samp0;
    #else
      SAMPLER_BINDING(0) uniform sampler2DArray samp0;
    #endif
    layout(location = 0) in vec3 uv0;
    layout(location = 0) out vec4 ocol0;

    void main()
    {
      int layer = 0;
      #if EFB_LAYERS > 1
        layer = int(uv0.z);
      #endif

      ivec3 coords = ivec3(gl_FragCoord.xy, layer);

      vec4 val;
      #if !MSAA_ENABLED
        // No MSAA - just load the first (and only) sample
        val = texelFetch(samp0, coords, 0);
      #elif SSAA_ENABLED
        // Sample shading, shader runs once per sample
        val = texelFetch(samp0, coords, gl_SampleID);
      #else
        // MSAA without sample shading, average out all samples.
        val = vec4(0, 0, 0, 0);
        for (int i = 0; i < MSAA_SAMPLES; i++)
          val += texelFetch(samp0, coords, i);
        val /= float(MSAA_SAMPLES);
      #endif

      ivec4 src6 = ivec4(round(val * 63.f));
      ivec4 dst8;
      dst8.r = (src6.r << 2) | (src6.g >> 4);
      dst8.g = ((src6.g & 0xF) << 4) | (src6.b >> 2);
      dst8.b = ((src6.b & 0x3) << 6) | src6.a;
      dst8.a = 255;

      ocol0 = float4(dst8) / 255.f;
    }
  )";

  static const char DEPTH_RESOLVE_SHADER_SOURCE[] = R"(
    SAMPLER_BINDING(0) uniform sampler2DMSArray samp0;
    layout(location = 0) in vec3 uv0;
    layout(location = 0) out float ocol0;

    void main()
    {
      int layer = 0;
      #if EFB_LAYERS > 1
        layer = int(uv0.z);
      #endif

      // gl_FragCoord is in window coordinates, and we're rendering to
      // the same rectangle in the resolve texture.
      ivec3 coords = ivec3(gl_FragCoord.xy, layer);

      // Take the minimum of all depth samples.
      ocol0 = texelFetch(samp0, coords, 0).r;
      for (int i = 1; i < MSAA_SAMPLES; i++)
        ocol0 = min(ocol0, texelFetch(samp0, coords, i).r);
    }
  )";

  std::string header = g_shader_cache->GetUtilityShaderHeader();
  DestroyConversionShaders();

  m_ps_rgb8_to_rgba6 = Util::CompileAndCreateFragmentShader(header + RGB8_TO_RGBA6_SHADER_SOURCE);
  m_ps_rgba6_to_rgb8 = Util::CompileAndCreateFragmentShader(header + RGBA6_TO_RGB8_SHADER_SOURCE);
  if (GetEFBSamples() != VK_SAMPLE_COUNT_1_BIT)
    m_ps_depth_resolve = Util::CompileAndCreateFragmentShader(header + DEPTH_RESOLVE_SHADER_SOURCE);

  return (m_ps_rgba6_to_rgb8 != VK_NULL_HANDLE && m_ps_rgb8_to_rgba6 != VK_NULL_HANDLE &&
          (GetEFBSamples() == VK_SAMPLE_COUNT_1_BIT || m_ps_depth_resolve != VK_NULL_HANDLE));
}

void FramebufferManager::DestroyConversionShaders()
{
  auto DestroyShader = [this](VkShaderModule& shader) {
    if (shader != VK_NULL_HANDLE)
    {
      vkDestroyShaderModule(g_vulkan_context->GetDevice(), shader, nullptr);
      shader = VK_NULL_HANDLE;
    }
  };

  DestroyShader(m_ps_rgb8_to_rgba6);
  DestroyShader(m_ps_rgba6_to_rgb8);
  DestroyShader(m_ps_depth_resolve);
}

u32 FramebufferManager::PeekEFBColor(u32 x, u32 y)
{
  if (!m_color_readback_texture_valid && !PopulateColorReadbackTexture())
    return 0;

  u32 value;
  m_color_readback_texture->ReadTexel(x, y, &value);
  return value;
}

bool FramebufferManager::PopulateColorReadbackTexture()
{
  // Can't be in our normal render pass.
  StateTracker::GetInstance()->EndRenderPass();
  StateTracker::GetInstance()->OnReadback();

  // Issue a copy from framebuffer -> copy texture if we have >1xIR or MSAA on.
  VkRect2D src_region = {{0, 0}, {GetEFBWidth(), GetEFBHeight()}};
  Texture2D* src_texture = m_efb_color_texture.get();
  if (GetEFBSamples() > 1)
    src_texture = ResolveEFBColorTexture(src_region);

  if (GetEFBWidth() != EFB_WIDTH || GetEFBHeight() != EFB_HEIGHT)
  {
    // Transition EFB to shader read before drawing.
    src_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                    VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
    m_color_copy_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                             VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);

    UtilityShaderDraw draw(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                           g_object_cache->GetPipelineLayout(PIPELINE_LAYOUT_STANDARD),
                           m_copy_color_render_pass, g_shader_cache->GetScreenQuadVertexShader(),
                           VK_NULL_HANDLE, m_copy_color_shader);

    VkRect2D rect = {{0, 0}, {EFB_WIDTH, EFB_HEIGHT}};
    draw.BeginRenderPass(m_color_copy_framebuffer, rect);
    draw.SetPSSampler(0, src_texture->GetView(), g_object_cache->GetPointSampler());
    draw.SetViewportAndScissor(0, 0, EFB_WIDTH, EFB_HEIGHT);
    draw.DrawWithoutVertexBuffer(4);
    draw.EndRenderPass();

    // Restore EFB to color attachment, since we're done with it.
    if (src_texture == m_efb_color_texture.get())
    {
      src_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                      VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
    }

    // Use this as a source texture now.
    src_texture = m_color_copy_texture.get();
  }

  // Copy from EFB or copy texture to staging texture.
  src_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                  VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
  static_cast<VKStagingTexture*>(m_color_readback_texture.get())
      ->CopyFromTexture(src_texture, m_color_readback_texture->GetConfig().GetRect(), 0, 0,
                        m_color_readback_texture->GetConfig().GetRect());

  // Restore original layout if we used the EFB as a source.
  if (src_texture == m_efb_color_texture.get())
  {
    src_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                    VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
  }

  // Wait until the copy is complete.
  m_color_readback_texture->Flush();
  m_color_readback_texture_valid = true;
  return true;
}

float FramebufferManager::PeekEFBDepth(u32 x, u32 y)
{
  if (!m_depth_readback_texture_valid && !PopulateDepthReadbackTexture())
    return 0.0f;

  float value;
  m_depth_readback_texture->ReadTexel(x, y, &value);
  return value;
}

bool FramebufferManager::PopulateDepthReadbackTexture()
{
  // Can't be in our normal render pass.
  StateTracker::GetInstance()->EndRenderPass();
  StateTracker::GetInstance()->OnReadback();

  // Issue a copy from framebuffer -> copy texture if we have >1xIR or MSAA on.
  VkRect2D src_region = {{0, 0}, {GetEFBWidth(), GetEFBHeight()}};
  Texture2D* src_texture = m_efb_depth_texture.get();
  if (GetEFBSamples() > 1)
  {
    // EFB depth resolves are written out as color textures
    src_texture = ResolveEFBDepthTexture(src_region);
  }
  if (GetEFBWidth() != EFB_WIDTH || GetEFBHeight() != EFB_HEIGHT)
  {
    // Transition EFB to shader read before drawing.
    src_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                    VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
    m_depth_copy_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                             VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);

    UtilityShaderDraw draw(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                           g_object_cache->GetPipelineLayout(PIPELINE_LAYOUT_STANDARD),
                           m_copy_depth_render_pass, g_shader_cache->GetScreenQuadVertexShader(),
                           VK_NULL_HANDLE, m_copy_depth_shader);

    VkRect2D rect = {{0, 0}, {EFB_WIDTH, EFB_HEIGHT}};
    draw.BeginRenderPass(m_depth_copy_framebuffer, rect);
    draw.SetPSSampler(0, src_texture->GetView(), g_object_cache->GetPointSampler());
    draw.SetViewportAndScissor(0, 0, EFB_WIDTH, EFB_HEIGHT);
    draw.DrawWithoutVertexBuffer(4);
    draw.EndRenderPass();

    // Restore EFB to depth attachment, since we're done with it.
    if (src_texture == m_efb_depth_texture.get())
    {
      src_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                      VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL);
    }

    // Use this as a source texture now.
    src_texture = m_depth_copy_texture.get();
  }

  // Copy from EFB or copy texture to staging texture.
  src_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                  VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
  static_cast<VKStagingTexture*>(m_depth_readback_texture.get())
      ->CopyFromTexture(src_texture, m_depth_readback_texture->GetConfig().GetRect(), 0, 0,
                        m_depth_readback_texture->GetConfig().GetRect());

  // Restore original layout if we used the EFB as a source.
  if (src_texture == m_efb_depth_texture.get())
  {
    src_texture->TransitionToLayout(g_command_buffer_mgr->GetCurrentCommandBuffer(),
                                    VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL);
  }

  // Wait until the copy is complete.
  m_depth_readback_texture->Flush();
  m_depth_readback_texture_valid = true;
  return true;
}

void FramebufferManager::InvalidatePeekCache()
{
  m_color_readback_texture_valid = false;
  m_depth_readback_texture_valid = false;
}

bool FramebufferManager::CreateReadbackRenderPasses()
{
  m_copy_color_render_pass = g_object_cache->GetRenderPass(
      EFB_COLOR_TEXTURE_FORMAT, VK_FORMAT_UNDEFINED, 1, VK_ATTACHMENT_LOAD_OP_DONT_CARE);
  m_copy_depth_render_pass = g_object_cache->GetRenderPass(
      EFB_DEPTH_AS_COLOR_TEXTURE_FORMAT, VK_FORMAT_UNDEFINED, 1, VK_ATTACHMENT_LOAD_OP_DONT_CARE);
  if (m_copy_color_render_pass == VK_NULL_HANDLE || m_copy_depth_render_pass == VK_NULL_HANDLE)
    return false;

  // Some devices don't support point sizes >1 (e.g. Adreno).
  // If we can't use a point size above our maximum IR, use triangles instead.
  // This means a 6x increase in the size of the vertices, though.
  if (!g_vulkan_context->GetDeviceFeatures().largePoints ||
      g_vulkan_context->GetDeviceLimits().pointSizeGranularity > 1 ||
      g_vulkan_context->GetDeviceLimits().pointSizeRange[0] > 1 ||
      g_vulkan_context->GetDeviceLimits().pointSizeRange[1] < 16)
  {
    m_poke_primitive = PrimitiveType::TriangleStrip;
  }
  else
  {
    // Points should be okay.
    m_poke_primitive = PrimitiveType::Points;
  }

  return true;
}

bool FramebufferManager::CompileReadbackShaders()
{
  std::string source;

  // TODO: Use input attachment here instead?
  // TODO: MSAA resolve in shader.
  static const char COPY_COLOR_SHADER_SOURCE[] = R"(
    SAMPLER_BINDING(0) uniform sampler2DArray samp0;
    layout(location = 0) in vec3 uv0;
    layout(location = 0) out vec4 ocol0;
    void main()
    {
      ocol0 = texture(samp0, uv0);
    }
  )";

  static const char COPY_DEPTH_SHADER_SOURCE[] = R"(
    SAMPLER_BINDING(0) uniform sampler2DArray samp0;
    layout(location = 0) in vec3 uv0;
    layout(location = 0) out float ocol0;
    void main()
    {
      ocol0 = texture(samp0, uv0).r;
    }
  )";

  source = g_shader_cache->GetUtilityShaderHeader() + COPY_COLOR_SHADER_SOURCE;
  m_copy_color_shader = Util::CompileAndCreateFragmentShader(source);

  source = g_shader_cache->GetUtilityShaderHeader() + COPY_DEPTH_SHADER_SOURCE;
  m_copy_depth_shader = Util::CompileAndCreateFragmentShader(source);

  return m_copy_color_shader != VK_NULL_HANDLE && m_copy_depth_shader != VK_NULL_HANDLE;
}

void FramebufferManager::DestroyReadbackShaders()
{
  if (m_copy_color_shader != VK_NULL_HANDLE)
  {
    vkDestroyShaderModule(g_vulkan_context->GetDevice(), m_copy_color_shader, nullptr);
    m_copy_color_shader = VK_NULL_HANDLE;
  }
  if (m_copy_depth_shader != VK_NULL_HANDLE)
  {
    vkDestroyShaderModule(g_vulkan_context->GetDevice(), m_copy_depth_shader, nullptr);
    m_copy_depth_shader = VK_NULL_HANDLE;
  }
}

bool FramebufferManager::CreateReadbackTextures()
{
  m_color_copy_texture =
      Texture2D::Create(EFB_WIDTH, EFB_HEIGHT, 1, 1, EFB_COLOR_TEXTURE_FORMAT,
                        VK_SAMPLE_COUNT_1_BIT, VK_IMAGE_VIEW_TYPE_2D, VK_IMAGE_TILING_OPTIMAL,
                        VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT |
                            VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT);

  m_depth_copy_texture =
      Texture2D::Create(EFB_WIDTH, EFB_HEIGHT, 1, 1, EFB_DEPTH_AS_COLOR_TEXTURE_FORMAT,
                        VK_SAMPLE_COUNT_1_BIT, VK_IMAGE_VIEW_TYPE_2D, VK_IMAGE_TILING_OPTIMAL,
                        VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT |
                            VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT);

  if (!m_color_copy_texture || !m_depth_copy_texture)
  {
    ERROR_LOG(VIDEO, "Failed to create EFB copy textures");
    return false;
  }

  TextureConfig readback_texture_config(EFB_WIDTH, EFB_HEIGHT, 1, 1, 1,
                                        AbstractTextureFormat::RGBA8, false);
  m_color_readback_texture =
      g_renderer->CreateStagingTexture(StagingTextureType::Mutable, readback_texture_config);
  m_depth_readback_texture =
      g_renderer->CreateStagingTexture(StagingTextureType::Mutable, readback_texture_config);
  if (!m_color_readback_texture || !m_depth_readback_texture)
  {
    ERROR_LOG(VIDEO, "Failed to create EFB readback textures");
    return false;
  }

  return true;
}

void FramebufferManager::DestroyReadbackTextures()
{
  m_color_copy_texture.reset();
  m_color_readback_texture.reset();
  m_color_readback_texture_valid = false;
  m_depth_copy_texture.reset();
  m_depth_readback_texture.reset();
  m_depth_readback_texture_valid = false;
}

bool FramebufferManager::CreateReadbackFramebuffer()
{
  VkImageView framebuffer_attachment = m_color_copy_texture->GetView();
  VkFramebufferCreateInfo framebuffer_info = {
      VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO,  // VkStructureType             sType
      nullptr,                                    // const void*                 pNext
      0,                                          // VkFramebufferCreateFlags    flags
      m_copy_color_render_pass,                   // VkRenderPass                renderPass
      1,                                          // uint32_t                    attachmentCount
      &framebuffer_attachment,                    // const VkImageView*          pAttachments
      EFB_WIDTH,                                  // uint32_t                    width
      EFB_HEIGHT,                                 // uint32_t                    height
      1                                           // uint32_t                    layers
  };
  VkResult res = vkCreateFramebuffer(g_vulkan_context->GetDevice(), &framebuffer_info, nullptr,
                                     &m_color_copy_framebuffer);
  if (res != VK_SUCCESS)
  {
    LOG_VULKAN_ERROR(res, "vkCreateFramebuffer failed: ");
    return false;
  }

  // Swap for depth
  framebuffer_info.renderPass = m_copy_depth_render_pass;
  framebuffer_attachment = m_depth_copy_texture->GetView();
  res = vkCreateFramebuffer(g_vulkan_context->GetDevice(), &framebuffer_info, nullptr,
                            &m_depth_copy_framebuffer);
  if (res != VK_SUCCESS)
  {
    LOG_VULKAN_ERROR(res, "vkCreateFramebuffer failed: ");
    return false;
  }

  return true;
}

void FramebufferManager::DestroyReadbackFramebuffer()
{
  if (m_color_copy_framebuffer != VK_NULL_HANDLE)
  {
    vkDestroyFramebuffer(g_vulkan_context->GetDevice(), m_color_copy_framebuffer, nullptr);
    m_color_copy_framebuffer = VK_NULL_HANDLE;
  }
  if (m_depth_copy_framebuffer != VK_NULL_HANDLE)
  {
    vkDestroyFramebuffer(g_vulkan_context->GetDevice(), m_depth_copy_framebuffer, nullptr);
    m_depth_copy_framebuffer = VK_NULL_HANDLE;
  }
}

void FramebufferManager::PokeEFBColor(u32 x, u32 y, u32 color)
{
  // Flush if we exceeded the number of vertices per batch.
  if ((m_color_poke_vertices.size() + 6) > MAX_POKE_VERTICES)
    FlushEFBPokes();

  CreatePokeVertices(&m_color_poke_vertices, x, y, 0.0f, color);

  // Update the peek cache if it's valid, since we know the color of the pixel now.
  if (m_color_readback_texture_valid)
    m_color_readback_texture->WriteTexel(x, y, &color);
}

void FramebufferManager::PokeEFBDepth(u32 x, u32 y, float depth)
{
  // Flush if we exceeded the number of vertices per batch.
  if ((m_color_poke_vertices.size() + 6) > MAX_POKE_VERTICES)
    FlushEFBPokes();

  CreatePokeVertices(&m_depth_poke_vertices, x, y, depth, 0);

  // Update the peek cache if it's valid, since we know the color of the pixel now.
  if (m_depth_readback_texture_valid)
    m_depth_readback_texture->WriteTexel(x, y, &depth);
}

void FramebufferManager::CreatePokeVertices(std::vector<EFBPokeVertex>* destination_list, u32 x,
                                            u32 y, float z, u32 color)
{
  if (m_poke_primitive == PrimitiveType::Points)
  {
    // GPU will expand the point to a quad.
    float cs_x = float(x) * 2.0f / EFB_WIDTH - 1.0f;
    float cs_y = float(y) * 2.0f / EFB_HEIGHT - 1.0f;
    float point_size = GetEFBWidth() / static_cast<float>(EFB_WIDTH);
    destination_list->push_back({{cs_x, cs_y, z, point_size}, color});
    return;
  }

  // Some devices don't support point sizes >1 (e.g. Adreno).
  // Generate quad from the single point (clip-space coordinates).
  float x1 = float(x) * 2.0f / EFB_WIDTH - 1.0f;
  float y1 = float(y) * 2.0f / EFB_HEIGHT - 1.0f;
  float x2 = float(x + 1) * 2.0f / EFB_WIDTH - 1.0f;
  float y2 = float(y + 1) * 2.0f / EFB_HEIGHT - 1.0f;
  destination_list->push_back({{x1, y1, z, 1.0f}, color});
  destination_list->push_back({{x2, y1, z, 1.0f}, color});
  destination_list->push_back({{x1, y2, z, 1.0f}, color});
  destination_list->push_back({{x1, y2, z, 1.0f}, color});
  destination_list->push_back({{x2, y1, z, 1.0f}, color});
  destination_list->push_back({{x2, y2, z, 1.0f}, color});
}

void FramebufferManager::FlushEFBPokes()
{
  if (!m_color_poke_vertices.empty())
  {
    DrawPokeVertices(m_color_poke_vertices.data(), m_color_poke_vertices.size(), true, false);
    m_color_poke_vertices.clear();
  }

  if (!m_depth_poke_vertices.empty())
  {
    DrawPokeVertices(m_depth_poke_vertices.data(), m_depth_poke_vertices.size(), false, true);
    m_depth_poke_vertices.clear();
  }
}

void FramebufferManager::DrawPokeVertices(const EFBPokeVertex* vertices, size_t vertex_count,
                                          bool write_color, bool write_depth)
{
  // Relatively simple since we don't have any bindings.
  VkCommandBuffer command_buffer = g_command_buffer_mgr->GetCurrentCommandBuffer();

  // We don't use the utility shader in order to keep the vertices compact.
  PipelineInfo pipeline_info = {};
  pipeline_info.vertex_format = m_poke_vertex_format.get();
  pipeline_info.pipeline_layout = g_object_cache->GetPipelineLayout(PIPELINE_LAYOUT_STANDARD);
  pipeline_info.vs = m_poke_vertex_shader;
  pipeline_info.gs = (GetEFBLayers() > 1) ? m_poke_geometry_shader : VK_NULL_HANDLE;
  pipeline_info.ps = m_poke_fragment_shader;
  pipeline_info.render_pass = m_efb_load_render_pass;
  pipeline_info.rasterization_state.hex = RenderState::GetNoCullRasterizationState().hex;
  pipeline_info.rasterization_state.primitive = m_poke_primitive;
  pipeline_info.multisampling_state.hex = GetEFBMultisamplingState().hex;
  pipeline_info.depth_state.hex = RenderState::GetNoDepthTestingDepthStencilState().hex;
  pipeline_info.blend_state.hex = RenderState::GetNoBlendingBlendState().hex;
  pipeline_info.blend_state.colorupdate = write_color;
  pipeline_info.blend_state.alphaupdate = write_color;
  if (write_depth)
  {
    pipeline_info.depth_state.testenable = true;
    pipeline_info.depth_state.updateenable = true;
    pipeline_info.depth_state.func = ZMode::ALWAYS;
  }

  VkPipeline pipeline = g_shader_cache->GetPipeline(pipeline_info);
  if (pipeline == VK_NULL_HANDLE)
  {
    PanicAlert("Failed to get pipeline for EFB poke draw");
    return;
  }

  // Populate vertex buffer.
  size_t vertices_size = sizeof(EFBPokeVertex) * m_color_poke_vertices.size();
  if (!m_poke_vertex_stream_buffer->ReserveMemory(vertices_size, sizeof(EfbPokeData), true, true,
                                                  false))
  {
    // Kick a command buffer first.
    WARN_LOG(VIDEO, "Kicking command buffer due to no EFB poke space.");
    Util::ExecuteCurrentCommandsAndRestoreState(false);
    command_buffer = g_command_buffer_mgr->GetCurrentCommandBuffer();

    if (!m_poke_vertex_stream_buffer->ReserveMemory(vertices_size, sizeof(EfbPokeData), true, true,
                                                    false))
    {
      PanicAlert("Failed to get space for EFB poke vertices");
      return;
    }
  }
  VkBuffer vb_buffer = m_poke_vertex_stream_buffer->GetBuffer();
  VkDeviceSize vb_offset = m_poke_vertex_stream_buffer->GetCurrentOffset();
  memcpy(m_poke_vertex_stream_buffer->GetCurrentHostPointer(), vertices, vertices_size);
  m_poke_vertex_stream_buffer->CommitMemory(vertices_size);

  // Set up state.
  StateTracker::GetInstance()->EndClearRenderPass();
  StateTracker::GetInstance()->BeginRenderPass();
  StateTracker::GetInstance()->SetPendingRebind();
  Util::SetViewportAndScissor(command_buffer, 0, 0, GetEFBWidth(), GetEFBHeight());
  vkCmdBindPipeline(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
  vkCmdBindVertexBuffers(command_buffer, 0, 1, &vb_buffer, &vb_offset);
  vkCmdDraw(command_buffer, static_cast<u32>(vertex_count), 1, 0, 0);
}

void FramebufferManager::CreatePokeVertexFormat()
{
  PortableVertexDeclaration vtx_decl = {};
  vtx_decl.position.enable = true;
  vtx_decl.position.type = VAR_FLOAT;
  vtx_decl.position.components = 4;
  vtx_decl.position.integer = false;
  vtx_decl.position.offset = offsetof(EFBPokeVertex, position);
  vtx_decl.colors[0].enable = true;
  vtx_decl.colors[0].type = VAR_UNSIGNED_BYTE;
  vtx_decl.colors[0].components = 4;
  vtx_decl.colors[0].integer = false;
  vtx_decl.colors[0].offset = offsetof(EFBPokeVertex, color);
  vtx_decl.stride = sizeof(EFBPokeVertex);

  m_poke_vertex_format = std::make_unique<VertexFormat>(vtx_decl);
}

bool FramebufferManager::CreatePokeVertexBuffer()
{
  m_poke_vertex_stream_buffer = StreamBuffer::Create(
      VK_BUFFER_USAGE_VERTEX_BUFFER_BIT, POKE_VERTEX_BUFFER_SIZE, POKE_VERTEX_BUFFER_SIZE);
  if (!m_poke_vertex_stream_buffer)
  {
    ERROR_LOG(VIDEO, "Failed to create EFB poke vertex buffer");
    return false;
  }

  return true;
}

void FramebufferManager::DestroyPokeVertexBuffer()
{
  m_poke_vertex_stream_buffer.reset();
}

bool FramebufferManager::CompilePokeShaders()
{
  static const char POKE_VERTEX_SHADER_SOURCE[] = R"(
    layout(location = 0) in vec4 ipos;
    layout(location = 5) in vec4 icol0;

    layout(location = 0) out vec4 col0;

    void main()
    {
      gl_Position = vec4(ipos.xyz, 1.0f);
      #if USE_POINT_SIZE
        gl_PointSize = ipos.w;
      #endif
      col0 = icol0;
    }

    )";

  static const char POKE_GEOMETRY_SHADER_SOURCE[] = R"(
    layout(triangles) in;
    layout(triangle_strip, max_vertices = EFB_LAYERS * 3) out;

    VARYING_LOCATION(0) in VertexData
    {
      vec4 col0;
    } in_data[];

    VARYING_LOCATION(0) out VertexData
    {
      vec4 col0;
    } out_data;

    void main()
    {
      for (int j = 0; j < EFB_LAYERS; j++)
      {
        for (int i = 0; i < 3; i++)
        {
          gl_Layer = j;
          gl_Position = gl_in[i].gl_Position;
          out_data.col0 = in_data[i].col0;
          EmitVertex();
        }
        EndPrimitive();
      }
    }
  )";

  static const char POKE_PIXEL_SHADER_SOURCE[] = R"(
    layout(location = 0) in vec4 col0;
    layout(location = 0) out vec4 ocol0;
    void main()
    {
      ocol0 = col0;
    }
  )";

  std::string source = g_shader_cache->GetUtilityShaderHeader();
  if (m_poke_primitive == PrimitiveType::Points)
    source += "#define USE_POINT_SIZE 1\n";
  source += POKE_VERTEX_SHADER_SOURCE;
  m_poke_vertex_shader = Util::CompileAndCreateVertexShader(source);
  if (m_poke_vertex_shader == VK_NULL_HANDLE)
    return false;

  if (g_vulkan_context->SupportsGeometryShaders())
  {
    source = g_shader_cache->GetUtilityShaderHeader() + POKE_GEOMETRY_SHADER_SOURCE;
    m_poke_geometry_shader = Util::CompileAndCreateGeometryShader(source);
    if (m_poke_geometry_shader == VK_NULL_HANDLE)
      return false;
  }

  source = g_shader_cache->GetUtilityShaderHeader() + POKE_PIXEL_SHADER_SOURCE;
  m_poke_fragment_shader = Util::CompileAndCreateFragmentShader(source);
  if (m_poke_fragment_shader == VK_NULL_HANDLE)
    return false;

  return true;
}

void FramebufferManager::DestroyPokeShaders()
{
  if (m_poke_vertex_shader != VK_NULL_HANDLE)
  {
    vkDestroyShaderModule(g_vulkan_context->GetDevice(), m_poke_vertex_shader, nullptr);
    m_poke_vertex_shader = VK_NULL_HANDLE;
  }
  if (m_poke_geometry_shader != VK_NULL_HANDLE)
  {
    vkDestroyShaderModule(g_vulkan_context->GetDevice(), m_poke_geometry_shader, nullptr);
    m_poke_geometry_shader = VK_NULL_HANDLE;
  }
  if (m_poke_fragment_shader != VK_NULL_HANDLE)
  {
    vkDestroyShaderModule(g_vulkan_context->GetDevice(), m_poke_fragment_shader, nullptr);
    m_poke_vertex_shader = VK_NULL_HANDLE;
  }
}

}  // namespace Vulkan