// Copyright 2010 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#include <cinttypes>
#include <cmath>
#include <memory>
#include <string>
#include <strsafe.h>
#include <unordered_map>

#include "Common/CommonTypes.h"
#include "Common/FileUtil.h"
#include "Common/MathUtil.h"

#include "Core/ConfigManager.h"
#include "Core/Core.h"
#include "Core/Host.h"

#include "VideoBackends/D3D12/BoundingBox.h"
#include "VideoBackends/D3D12/D3DBase.h"
#include "VideoBackends/D3D12/D3DCommandListManager.h"
#include "VideoBackends/D3D12/D3DDescriptorHeapManager.h"
#include "VideoBackends/D3D12/D3DState.h"
#include "VideoBackends/D3D12/D3DUtil.h"
#include "VideoBackends/D3D12/FramebufferManager.h"
#include "VideoBackends/D3D12/NativeVertexFormat.h"
#include "VideoBackends/D3D12/Render.h"
#include "VideoBackends/D3D12/ShaderCache.h"
#include "VideoBackends/D3D12/ShaderConstantsManager.h"
#include "VideoBackends/D3D12/StaticShaderCache.h"
#include "VideoBackends/D3D12/TextureCache.h"

#include "VideoCommon/AVIDump.h"
#include "VideoCommon/BPFunctions.h"
#include "VideoCommon/Fifo.h"
#include "VideoCommon/OnScreenDisplay.h"
#include "VideoCommon/PixelEngine.h"
#include "VideoCommon/PixelShaderManager.h"
#include "VideoCommon/SamplerCommon.h"
#include "VideoCommon/VertexLoaderManager.h"
#include "VideoCommon/VideoConfig.h"

namespace DX12
{
static u32 s_last_multisamples = 1;
static bool s_last_stereo_mode = false;
static bool s_last_xfb_mode = false;

enum CLEAR_BLEND_DESC
{
  CLEAR_BLEND_DESC_ALL_CHANNELS_ENABLED = 0,
  CLEAR_BLEND_DESC_RGB_CHANNELS_ENABLED = 1,
  CLEAR_BLEND_DESC_ALPHA_CHANNEL_ENABLED = 2,
  CLEAR_BLEND_DESC_ALL_CHANNELS_DISABLED = 3
};

static D3D12_BLEND_DESC s_clear_blend_descs[4] = {};

enum CLEAR_DEPTH_DESC
{
  CLEAR_DEPTH_DESC_DEPTH_DISABLED = 0,
  CLEAR_DEPTH_DESC_DEPTH_ENABLED_WRITES_ENABLED = 1,
  CLEAR_DEPTH_DESC_DEPTH_ENABLED_WRITES_DISABLED = 2,
};

static D3D12_DEPTH_STENCIL_DESC s_clear_depth_descs[3] = {};

// These are accessed in D3DUtil.
D3D12_BLEND_DESC g_reset_blend_desc = {};
D3D12_DEPTH_STENCIL_DESC g_reset_depth_desc = {};
D3D12_RASTERIZER_DESC g_reset_rast_desc = {};

static ID3D12Resource* s_screenshot_texture = nullptr;

// Nvidia stereo blitting struct defined in "nvstereo.h" from the Nvidia SDK
typedef struct _Nv_Stereo_Image_Header
{
  unsigned int dwSignature;
  unsigned int dwWidth;
  unsigned int dwHeight;
  unsigned int dwBPP;
  unsigned int dwFlags;
} NVSTEREOIMAGEHEADER, *LPNVSTEREOIMAGEHEADER;

#define NVSTEREO_IMAGE_SIGNATURE 0x4433564e

// GX pipeline state
static struct
{
  SamplerState sampler[8];
  BlendState blend;
  ZMode zmode;
  RasterizerState raster;

} gx_state;

StateCache gx_state_cache;

static void SetupDeviceObjects()
{
  g_framebuffer_manager = std::make_unique<FramebufferManager>();

  D3D12_DEPTH_STENCIL_DESC depth_desc;
  depth_desc.DepthEnable = FALSE;
  depth_desc.DepthWriteMask = D3D12_DEPTH_WRITE_MASK_ZERO;
  depth_desc.DepthFunc = D3D12_COMPARISON_FUNC_ALWAYS;
  depth_desc.StencilEnable = FALSE;
  depth_desc.StencilReadMask = D3D12_DEFAULT_STENCIL_READ_MASK;
  depth_desc.StencilWriteMask = D3D12_DEFAULT_STENCIL_WRITE_MASK;
  s_clear_depth_descs[CLEAR_DEPTH_DESC_DEPTH_DISABLED] = depth_desc;

  depth_desc.DepthWriteMask = D3D12_DEPTH_WRITE_MASK_ALL;
  depth_desc.DepthEnable = TRUE;
  s_clear_depth_descs[CLEAR_DEPTH_DESC_DEPTH_ENABLED_WRITES_ENABLED] = depth_desc;

  depth_desc.DepthWriteMask = D3D12_DEPTH_WRITE_MASK_ZERO;
  s_clear_depth_descs[CLEAR_DEPTH_DESC_DEPTH_ENABLED_WRITES_DISABLED] = depth_desc;

  D3D12_BLEND_DESC blend_desc;
  blend_desc.AlphaToCoverageEnable = FALSE;
  blend_desc.IndependentBlendEnable = FALSE;
  blend_desc.RenderTarget[0].LogicOpEnable = FALSE;
  blend_desc.RenderTarget[0].LogicOp = D3D12_LOGIC_OP_NOOP;
  blend_desc.RenderTarget[0].BlendEnable = FALSE;
  blend_desc.RenderTarget[0].RenderTargetWriteMask = D3D12_COLOR_WRITE_ENABLE_ALL;
  blend_desc.RenderTarget[0].SrcBlend = D3D12_BLEND_ONE;
  blend_desc.RenderTarget[0].DestBlend = D3D12_BLEND_ZERO;
  blend_desc.RenderTarget[0].BlendOp = D3D12_BLEND_OP_ADD;
  blend_desc.RenderTarget[0].SrcBlendAlpha = D3D12_BLEND_ONE;
  blend_desc.RenderTarget[0].DestBlendAlpha = D3D12_BLEND_ZERO;
  blend_desc.RenderTarget[0].BlendOpAlpha = D3D12_BLEND_OP_ADD;
  g_reset_blend_desc = blend_desc;
  s_clear_blend_descs[CLEAR_BLEND_DESC_ALL_CHANNELS_ENABLED] = g_reset_blend_desc;

  blend_desc.RenderTarget[0].RenderTargetWriteMask =
      D3D12_COLOR_WRITE_ENABLE_RED | D3D12_COLOR_WRITE_ENABLE_GREEN | D3D12_COLOR_WRITE_ENABLE_BLUE;
  s_clear_blend_descs[CLEAR_BLEND_DESC_RGB_CHANNELS_ENABLED] = blend_desc;

  blend_desc.RenderTarget[0].RenderTargetWriteMask = D3D12_COLOR_WRITE_ENABLE_ALPHA;
  s_clear_blend_descs[CLEAR_BLEND_DESC_ALPHA_CHANNEL_ENABLED] = blend_desc;

  blend_desc.RenderTarget[0].RenderTargetWriteMask = 0;
  s_clear_blend_descs[CLEAR_BLEND_DESC_ALL_CHANNELS_DISABLED] = blend_desc;

  depth_desc.DepthEnable = FALSE;
  depth_desc.DepthWriteMask = D3D12_DEPTH_WRITE_MASK_ZERO;
  depth_desc.DepthFunc = D3D12_COMPARISON_FUNC_LESS;
  depth_desc.StencilEnable = FALSE;
  depth_desc.StencilReadMask = D3D12_DEFAULT_STENCIL_READ_MASK;
  depth_desc.StencilWriteMask = D3D12_DEFAULT_STENCIL_WRITE_MASK;

  g_reset_depth_desc = depth_desc;

  D3D12_RASTERIZER_DESC rast_desc =
      CD3DX12_RASTERIZER_DESC(D3D12_FILL_MODE_SOLID, D3D12_CULL_MODE_NONE, false, 0, 0.f, 0.f,
                              false, false, false, 0, D3D12_CONSERVATIVE_RASTERIZATION_MODE_OFF);
  g_reset_rast_desc = rast_desc;

  s_screenshot_texture = nullptr;
}

// Kill off all device objects
static void TeardownDeviceObjects()
{
  g_framebuffer_manager.reset();

  if (s_screenshot_texture)
  {
    D3D::command_list_mgr->DestroyResourceAfterCurrentCommandListExecuted(s_screenshot_texture);
    s_screenshot_texture = nullptr;
  }

  gx_state_cache.Clear();
}

void CreateScreenshotTexture()
{
  // We can't render anything outside of the backbuffer anyway, so use the backbuffer size as the
  // screenshot buffer size.
  // This texture is released to be recreated when the window is resized in Renderer::SwapImpl.

  const unsigned int screenshot_buffer_size =
      D3D::AlignValue(D3D::GetBackBufferWidth() * 4, D3D12_TEXTURE_DATA_PITCH_ALIGNMENT) *
      D3D::GetBackBufferHeight();

  CheckHR(D3D::device12->CreateCommittedResource(
      &CD3DX12_HEAP_PROPERTIES(D3D12_HEAP_TYPE_READBACK), D3D12_HEAP_FLAG_NONE,
      &CD3DX12_RESOURCE_DESC::Buffer(screenshot_buffer_size), D3D12_RESOURCE_STATE_COPY_DEST,
      nullptr, IID_PPV_ARGS(&s_screenshot_texture)));
}

static D3D12_BOX GetScreenshotSourceBox(const TargetRectangle& target_rc)
{
  // Since the screenshot buffer is copied back to the CPU, we can't access pixels that
  // fall outside the backbuffer bounds. Therefore, when crop is enabled and the target rect is
  // off-screen to the top/left, we clamp the origin at zero, as well as the bottom/right
  // coordinates at the backbuffer dimensions. This will result in a rectangle that can be
  // smaller than the backbuffer, but never larger.

  return CD3DX12_BOX(
      std::max(target_rc.left, 0), std::max(target_rc.top, 0), 0,
      std::min(D3D::GetBackBufferWidth(), static_cast<unsigned int>(target_rc.right)),
      std::min(D3D::GetBackBufferHeight(), static_cast<unsigned int>(target_rc.bottom)), 1);
}

static void Create3DVisionTexture(int width, int height)
{
  // D3D12TODO: 3D Vision not implemented on D3D12 backend.
}

Renderer::Renderer(void*& window_handle)
{
  if (g_ActiveConfig.iStereoMode == STEREO_3DVISION)
  {
    PanicAlert("3DVision not implemented on D3D12 backend.");
    return;
  }

  s_backbuffer_width = D3D::GetBackBufferWidth();
  s_backbuffer_height = D3D::GetBackBufferHeight();

  FramebufferManagerBase::SetLastXfbWidth(MAX_XFB_WIDTH);
  FramebufferManagerBase::SetLastXfbHeight(MAX_XFB_HEIGHT);

  UpdateDrawRectangle(s_backbuffer_width, s_backbuffer_height);

  s_last_multisamples = g_ActiveConfig.iMultisamples;
  s_last_efb_scale = g_ActiveConfig.iEFBScale;
  s_last_stereo_mode = g_ActiveConfig.iStereoMode > 0;
  s_last_xfb_mode = g_ActiveConfig.bUseRealXFB;
  CalculateTargetSize(s_backbuffer_width, s_backbuffer_height);
  PixelShaderManager::SetEfbScaleChanged();

  SetupDeviceObjects();

  // Setup GX pipeline state
  gx_state.blend.blend_enable = false;
  gx_state.blend.write_mask = D3D12_COLOR_WRITE_ENABLE_ALL;
  gx_state.blend.src_blend = D3D12_BLEND_ONE;
  gx_state.blend.dst_blend = D3D12_BLEND_ZERO;
  gx_state.blend.blend_op = D3D12_BLEND_OP_ADD;
  gx_state.blend.use_dst_alpha = false;

  for (unsigned int k = 0; k < 8; k++)
  {
    gx_state.sampler[k].hex = 0;
  }

  gx_state.zmode.testenable = false;
  gx_state.zmode.updateenable = false;
  gx_state.zmode.func = ZMode::NEVER;

  gx_state.raster.cull_mode = D3D12_CULL_MODE_NONE;

  // Clear EFB textures
  float clear_color[4] = {0.f, 0.f, 0.f, 1.f};
  FramebufferManager::GetEFBColorTexture()->TransitionToResourceState(
      D3D::current_command_list, D3D12_RESOURCE_STATE_RENDER_TARGET);
  FramebufferManager::GetEFBDepthTexture()->TransitionToResourceState(
      D3D::current_command_list, D3D12_RESOURCE_STATE_DEPTH_WRITE);
  D3D::current_command_list->ClearRenderTargetView(
      FramebufferManager::GetEFBColorTexture()->GetRTV12(), clear_color, 0, nullptr);
  D3D::current_command_list->ClearDepthStencilView(
      FramebufferManager::GetEFBDepthTexture()->GetDSV12(), D3D12_CLEAR_FLAG_DEPTH, 0.f, 0, 0,
      nullptr);

  D3D12_VIEWPORT vp = {0.f,
                       0.f,
                       static_cast<float>(s_target_width),
                       static_cast<float>(s_target_height),
                       D3D12_MIN_DEPTH,
                       D3D12_MAX_DEPTH};
  D3D::current_command_list->RSSetViewports(1, &vp);

  // Already transitioned to appropriate states a few lines up for the clears.
  FramebufferManager::RestoreEFBRenderTargets();

  D3D::BeginFrame();
}

Renderer::~Renderer()
{
  D3D::EndFrame();
  D3D::WaitForOutstandingRenderingToComplete();
  TeardownDeviceObjects();
}

void Renderer::RenderText(const std::string& text, int left, int top, u32 color)
{
  D3D::font.DrawTextScaled(static_cast<float>(left + 1), static_cast<float>(top + 1), 20.f, 0.0f,
                           color & 0xFF000000, text);
  D3D::font.DrawTextScaled(static_cast<float>(left), static_cast<float>(top), 20.f, 0.0f, color,
                           text);
}

TargetRectangle Renderer::ConvertEFBRectangle(const EFBRectangle& rc)
{
  TargetRectangle result;
  result.left = EFBToScaledX(rc.left);
  result.top = EFBToScaledY(rc.top);
  result.right = EFBToScaledX(rc.right);
  result.bottom = EFBToScaledY(rc.bottom);
  return result;
}

// With D3D, we have to resize the backbuffer if the window changed
// size.
__declspec(noinline) bool Renderer::CheckForResize()
{
  RECT rc_window;
  GetClientRect(D3D::hWnd, &rc_window);
  int client_width = rc_window.right - rc_window.left;
  int client_height = rc_window.bottom - rc_window.top;

  // Sanity check
  if ((client_width != Renderer::GetBackbufferWidth() ||
       client_height != Renderer::GetBackbufferHeight()) &&
      client_width >= 4 && client_height >= 4)
  {
    return true;
  }

  return false;
}

void Renderer::SetScissorRect(const EFBRectangle& rc)
{
  TargetRectangle trc = ConvertEFBRectangle(rc);
  D3D::current_command_list->RSSetScissorRects(1, trc.AsRECT());
}

void Renderer::SetColorMask()
{
  // Only enable alpha channel if it's supported by the current EFB format
  UINT8 color_mask = 0;
  if (bpmem.alpha_test.TestResult() != AlphaTest::FAIL)
  {
    if (bpmem.blendmode.alphaupdate && (bpmem.zcontrol.pixel_format == PEControl::RGBA6_Z24))
      color_mask = D3D12_COLOR_WRITE_ENABLE_ALPHA;
    if (bpmem.blendmode.colorupdate)
      color_mask |= D3D12_COLOR_WRITE_ENABLE_RED | D3D12_COLOR_WRITE_ENABLE_GREEN |
                    D3D12_COLOR_WRITE_ENABLE_BLUE;
  }
  gx_state.blend.write_mask = color_mask;

  D3D::command_list_mgr->SetCommandListDirtyState(COMMAND_LIST_STATE_PSO, true);
}

// This function allows the CPU to directly access the EFB.
// There are EFB peeks (which will read the color or depth of a pixel)
// and EFB pokes (which will change the color or depth of a pixel).
//
// The behavior of EFB peeks can only be modified by:
//  - GX_PokeAlphaRead
// The behavior of EFB pokes can be modified by:
//  - GX_PokeAlphaMode (TODO)
//  - GX_PokeAlphaUpdate (TODO)
//  - GX_PokeBlendMode (TODO)
//  - GX_PokeColorUpdate (TODO)
//  - GX_PokeDither (TODO)
//  - GX_PokeDstAlpha (TODO)
//  - GX_PokeZMode (TODO)
u32 Renderer::AccessEFB(EFBAccessType type, u32 x, u32 y, u32 poke_data)
{
  if (type == PEEK_COLOR)
  {
    u32 color = FramebufferManager::ReadEFBColorAccessCopy(x, y);

    // a little-endian value is expected to be returned
    color = ((color & 0xFF00FF00) | ((color >> 16) & 0xFF) | ((color << 16) & 0xFF0000));

    // check what to do with the alpha channel (GX_PokeAlphaRead)
    PixelEngine::UPEAlphaReadReg alpha_read_mode = PixelEngine::GetAlphaReadMode();

    if (bpmem.zcontrol.pixel_format == PEControl::RGBA6_Z24)
    {
      color = RGBA8ToRGBA6ToRGBA8(color);
    }
    else if (bpmem.zcontrol.pixel_format == PEControl::RGB565_Z16)
    {
      color = RGBA8ToRGB565ToRGBA8(color);
    }
    if (bpmem.zcontrol.pixel_format != PEControl::RGBA6_Z24)
    {
      color |= 0xFF000000;
    }

    if (alpha_read_mode.ReadMode == 2)
    {
      return color;  // GX_READ_NONE
    }
    else if (alpha_read_mode.ReadMode == 1)
    {
      return (color | 0xFF000000);  // GX_READ_FF
    }
    else /*if(alpha_read_mode.ReadMode == 0)*/
    {
      return (color & 0x00FFFFFF);  // GX_READ_00
    }
  }
  else  // if (type == PEEK_Z)
  {
    // depth buffer is inverted in the d3d backend
    float depth = 1.0f - FramebufferManager::ReadEFBDepthAccessCopy(x, y);
    u32 ret = 0;

    if (bpmem.zcontrol.pixel_format == PEControl::RGB565_Z16)
    {
      // if Z is in 16 bit format you must return a 16 bit integer
      ret = MathUtil::Clamp<u32>(static_cast<u32>(depth * 65536.0f), 0, 0xFFFF);
    }
    else
    {
      ret = MathUtil::Clamp<u32>(static_cast<u32>(depth * 16777216.0f), 0, 0xFFFFFF);
    }

    return ret;
  }
}

void Renderer::PokeEFB(EFBAccessType type, const EfbPokeData* points, size_t num_points)
{
  D3D::SetViewportAndScissor(0, 0, GetTargetWidth(), GetTargetHeight());

  if (type == POKE_COLOR)
  {
    // In the D3D12 backend, the rt/db/viewport is passed into DrawEFBPokeQuads, and set there.
    D3D::DrawEFBPokeQuads(type, points, num_points, &g_reset_blend_desc, &g_reset_depth_desc,
                          &FramebufferManager::GetEFBColorTexture()->GetRTV12(), nullptr,
                          FramebufferManager::GetEFBColorTexture()->GetMultisampled());
  }
  else  // if (type == POKE_Z)
  {
    D3D::DrawEFBPokeQuads(type, points, num_points,
                          &s_clear_blend_descs[CLEAR_BLEND_DESC_ALL_CHANNELS_DISABLED],
                          &s_clear_depth_descs[CLEAR_DEPTH_DESC_DEPTH_ENABLED_WRITES_ENABLED],
                          &FramebufferManager::GetEFBColorTexture()->GetRTV12(),
                          &FramebufferManager::GetEFBDepthTexture()->GetDSV12(),
                          FramebufferManager::GetEFBColorTexture()->GetMultisampled());
  }

  RestoreAPIState();
}

void Renderer::SetViewport()
{
  // reversed gxsetviewport(xorig, yorig, width, height, nearz, farz)
  // [0] = width/2
  // [1] = height/2
  // [2] = 16777215 * (farz - nearz)
  // [3] = xorig + width/2 + 342
  // [4] = yorig + height/2 + 342
  // [5] = 16777215 * farz

  // D3D crashes for zero viewports
  if (xfmem.viewport.wd == 0 || xfmem.viewport.ht == 0)
    return;

  int scissor_x_offset = bpmem.scissorOffset.x * 2;
  int scissor_y_offset = bpmem.scissorOffset.y * 2;

  float x = Renderer::EFBToScaledXf(xfmem.viewport.xOrig - xfmem.viewport.wd - scissor_x_offset);
  float y = Renderer::EFBToScaledYf(xfmem.viewport.yOrig + xfmem.viewport.ht - scissor_y_offset);
  float width = Renderer::EFBToScaledXf(2.0f * xfmem.viewport.wd);
  float height = Renderer::EFBToScaledYf(-2.0f * xfmem.viewport.ht);
  if (width < 0.0f)
  {
    x += width;
    width = -width;
  }
  if (height < 0.0f)
  {
    y += height;
    height = -height;
  }

  // In D3D, the viewport rectangle must fit within the render target.
  x = (x >= 0.f) ? x : 0.f;
  y = (y >= 0.f) ? y : 0.f;
  width = (x + width <= GetTargetWidth()) ? width : (GetTargetWidth() - x);
  height = (y + height <= GetTargetHeight()) ? height : (GetTargetHeight() - y);

  // We do depth clipping and depth range in the vertex shader instead of relying
  // on the graphics API. However we still need to ensure depth values don't exceed
  // the maximum value supported by the console GPU. We also need to account for the
  // fact that the entire depth buffer is inverted on D3D, so we set GX_MAX_DEPTH as
  // an inverted near value.
  D3D12_VIEWPORT vp = {x, y, width, height, 1.0f - GX_MAX_DEPTH, D3D12_MAX_DEPTH};
  D3D::current_command_list->RSSetViewports(1, &vp);
}

void Renderer::ClearScreen(const EFBRectangle& rc, bool color_enable, bool alpha_enable,
                           bool z_enable, u32 color, u32 z)
{
  D3D12_BLEND_DESC* blend_desc = nullptr;

  if (color_enable && alpha_enable)
    blend_desc = &s_clear_blend_descs[CLEAR_BLEND_DESC_ALL_CHANNELS_ENABLED];
  else if (color_enable)
    blend_desc = &s_clear_blend_descs[CLEAR_BLEND_DESC_RGB_CHANNELS_ENABLED];
  else if (alpha_enable)
    blend_desc = &s_clear_blend_descs[CLEAR_BLEND_DESC_ALPHA_CHANNEL_ENABLED];
  else
    blend_desc = &s_clear_blend_descs[CLEAR_BLEND_DESC_ALL_CHANNELS_DISABLED];

  D3D12_DEPTH_STENCIL_DESC* depth_stencil_desc = nullptr;

  // EXISTINGD3D11TODO: Should we enable Z testing here?
  /*if (!bpmem.zmode.testenable) depth_stencil_desc =
  &s_clear_depth_descs[CLEAR_DEPTH_DESC_DEPTH_DISABLED];
  else */
  if (z_enable)
    depth_stencil_desc = &s_clear_depth_descs[CLEAR_DEPTH_DESC_DEPTH_ENABLED_WRITES_ENABLED];
  else /*if (!z_enable)*/
    depth_stencil_desc = &s_clear_depth_descs[CLEAR_DEPTH_DESC_DEPTH_ENABLED_WRITES_DISABLED];

  // Update the view port for clearing the picture
  TargetRectangle target_rc = Renderer::ConvertEFBRectangle(rc);

  // Color is passed in bgra mode so we need to convert it to rgba
  u32 rgba_color = (color & 0xFF00FF00) | ((color >> 16) & 0xFF) | ((color << 16) & 0xFF0000);
  D3D::SetViewportAndScissor(target_rc.left, target_rc.top, target_rc.GetWidth(),
                             target_rc.GetHeight());
  D3D::DrawClearQuad(rgba_color, 1.0f - (z & 0xFFFFFF) / 16777216.0f, blend_desc,
                     depth_stencil_desc,
                     FramebufferManager::GetEFBColorTexture()->GetMultisampled());

  // Restores proper viewport/scissor settings.
  SetViewport();
  BPFunctions::SetScissor();

  FramebufferManager::InvalidateEFBAccessCopies();
}

void Renderer::ReinterpretPixelData(unsigned int convtype)
{
  // EXISTINGD3D11TODO: MSAA support..
  D3D12_RECT source = CD3DX12_RECT(0, 0, GetTargetWidth(), GetTargetHeight());
  D3D12_SHADER_BYTECODE pixel_shader = {};

  if (convtype == 0)
  {
    pixel_shader = StaticShaderCache::GetReinterpRGB8ToRGBA6PixelShader(true);
  }
  else if (convtype == 2)
  {
    pixel_shader = StaticShaderCache::GetReinterpRGBA6ToRGB8PixelShader(true);
  }
  else
  {
    ERROR_LOG(VIDEO, "Trying to reinterpret pixel data with unsupported conversion type %d",
              convtype);
    return;
  }

  D3D::SetViewportAndScissor(0, 0, GetTargetWidth(), GetTargetHeight());

  FramebufferManager::GetEFBColorTempTexture()->TransitionToResourceState(
      D3D::current_command_list, D3D12_RESOURCE_STATE_RENDER_TARGET);
  D3D::current_command_list->OMSetRenderTargets(
      1, &FramebufferManager::GetEFBColorTempTexture()->GetRTV12(), FALSE, nullptr);

  D3D::SetPointCopySampler();
  D3D::DrawShadedTexQuad(
      FramebufferManager::GetEFBColorTexture(), &source, GetTargetWidth(), GetTargetHeight(),
      pixel_shader, StaticShaderCache::GetSimpleVertexShader(),
      StaticShaderCache::GetSimpleVertexShaderInputLayout(),
      StaticShaderCache::GetCopyGeometryShader(), 1.0f, 0, DXGI_FORMAT_R8G8B8A8_UNORM, false,
      FramebufferManager::GetEFBColorTempTexture()->GetMultisampled());

  FramebufferManager::SwapReinterpretTexture();

  FramebufferManager::GetEFBColorTexture()->TransitionToResourceState(
      D3D::current_command_list, D3D12_RESOURCE_STATE_RENDER_TARGET);
  FramebufferManager::GetEFBDepthTexture()->TransitionToResourceState(
      D3D::current_command_list, D3D12_RESOURCE_STATE_DEPTH_WRITE);

  // Restores proper viewport/scissor settings.
  RestoreAPIState();
}

void Renderer::SetBlendMode(bool force_update)
{
  // Our render target always uses an alpha channel, so we need to override the blend functions to
  // assume a destination alpha of 1 if the render target isn't supposed to have an alpha channel
  // Example: D3DBLEND_DESTALPHA needs to be D3DBLEND_ONE since the result without an alpha channel
  // is assumed to always be 1.
  bool target_has_alpha = bpmem.zcontrol.pixel_format == PEControl::RGBA6_Z24;
  const D3D12_BLEND d3d_src_factors[8] = {
      D3D12_BLEND_ZERO,
      D3D12_BLEND_ONE,
      D3D12_BLEND_DEST_COLOR,
      D3D12_BLEND_INV_DEST_COLOR,
      D3D12_BLEND_SRC_ALPHA,
      D3D12_BLEND_INV_SRC_ALPHA,  // NOTE: Use SRC1_ALPHA if dst alpha is enabled!
      (target_has_alpha) ? D3D12_BLEND_DEST_ALPHA : D3D12_BLEND_ONE,
      (target_has_alpha) ? D3D12_BLEND_INV_DEST_ALPHA : D3D12_BLEND_ZERO};
  const D3D12_BLEND d3d_dst_factors[8] = {
      D3D12_BLEND_ZERO,
      D3D12_BLEND_ONE,
      D3D12_BLEND_SRC_COLOR,
      D3D12_BLEND_INV_SRC_COLOR,
      D3D12_BLEND_SRC_ALPHA,
      D3D12_BLEND_INV_SRC_ALPHA,  // NOTE: Use SRC1_ALPHA if dst alpha is enabled!
      (target_has_alpha) ? D3D12_BLEND_DEST_ALPHA : D3D12_BLEND_ONE,
      (target_has_alpha) ? D3D12_BLEND_INV_DEST_ALPHA : D3D12_BLEND_ZERO};

  if (bpmem.blendmode.logicopenable && !bpmem.blendmode.blendenable && !force_update)
    return;

  if (bpmem.blendmode.subtract)
  {
    gx_state.blend.blend_enable = true;
    gx_state.blend.blend_op = D3D12_BLEND_OP_REV_SUBTRACT;
    gx_state.blend.src_blend = D3D12_BLEND_ONE;
    gx_state.blend.dst_blend = D3D12_BLEND_ONE;
  }
  else
  {
    gx_state.blend.blend_enable = static_cast<u32>(bpmem.blendmode.blendenable);
    if (bpmem.blendmode.blendenable)
    {
      gx_state.blend.blend_op = D3D12_BLEND_OP_ADD;
      gx_state.blend.src_blend = d3d_src_factors[bpmem.blendmode.srcfactor];
      gx_state.blend.dst_blend = d3d_dst_factors[bpmem.blendmode.dstfactor];
    }
  }

  D3D::command_list_mgr->SetCommandListDirtyState(COMMAND_LIST_STATE_PSO, true);
}

// This function has the final picture. We adjust the aspect ratio here.
void Renderer::SwapImpl(u32 xfb_addr, u32 fb_width, u32 fb_stride, u32 fb_height,
                        const EFBRectangle& rc, u64 ticks, float gamma)
{
  if ((!XFBWrited && !g_ActiveConfig.RealXFBEnabled()) || !fb_width || !fb_height)
  {
    Core::Callback_VideoCopiedToXFB(false);
    return;
  }

  u32 xfb_count = 0;
  const XFBSourceBase* const* xfb_source_list =
      FramebufferManager::GetXFBSource(xfb_addr, fb_stride, fb_height, &xfb_count);
  if ((!xfb_source_list || xfb_count == 0) && g_ActiveConfig.bUseXFB && !g_ActiveConfig.bUseRealXFB)
  {
    Core::Callback_VideoCopiedToXFB(false);
    return;
  }

  // Invalidate EFB access copies. Not strictly necessary, but this avoids having the buffers mapped
  // when calling Present().
  FramebufferManager::InvalidateEFBAccessCopies();
  BBox::Invalidate();

  // Prepare to copy the XFBs to our backbuffer
  UpdateDrawRectangle(s_backbuffer_width, s_backbuffer_height);
  TargetRectangle target_rc = GetTargetRectangle();

  D3D::GetBackBuffer()->TransitionToResourceState(D3D::current_command_list,
                                                  D3D12_RESOURCE_STATE_RENDER_TARGET);
  D3D::current_command_list->OMSetRenderTargets(1, &D3D::GetBackBuffer()->GetRTV12(), FALSE,
                                                nullptr);

  float clear_color[4] = {0.f, 0.f, 0.f, 1.f};
  D3D::current_command_list->ClearRenderTargetView(D3D::GetBackBuffer()->GetRTV12(), clear_color, 0,
                                                   nullptr);

  // activate linear filtering for the buffer copies
  D3D::SetLinearCopySampler();

  if (g_ActiveConfig.bUseXFB)
  {
    const XFBSource* xfb_source;

    // draw each xfb source
    for (u32 i = 0; i < xfb_count; ++i)
    {
      xfb_source = static_cast<const XFBSource*>(xfb_source_list[i]);

      TargetRectangle drawRc;
      TargetRectangle source_rc;
      source_rc.left = xfb_source->sourceRc.left;
      source_rc.top = xfb_source->sourceRc.top;
      source_rc.right = xfb_source->sourceRc.right;
      source_rc.bottom = xfb_source->sourceRc.bottom;

      // use virtual xfb with offset
      int xfb_height = xfb_source->srcHeight;
      int xfb_width = xfb_source->srcWidth;
      int hOffset = (static_cast<s32>(xfb_source->srcAddr) - static_cast<s32>(xfb_addr)) /
                    (static_cast<s32>(fb_stride) * 2);

      if (g_ActiveConfig.bUseRealXFB)
      {
        drawRc = target_rc;
        source_rc.right -= fb_stride - fb_width;
      }
      else
      {
        drawRc.top = target_rc.top + hOffset * target_rc.GetHeight() / static_cast<s32>(fb_height);
        drawRc.bottom =
            target_rc.top +
            (hOffset + xfb_height) * target_rc.GetHeight() / static_cast<s32>(fb_height);
        drawRc.left = target_rc.left +
                      (target_rc.GetWidth() -
                       xfb_width * target_rc.GetWidth() / static_cast<s32>(fb_stride)) /
                          2;
        drawRc.right = target_rc.left +
                       (target_rc.GetWidth() +
                        xfb_width * target_rc.GetWidth() / static_cast<s32>(fb_stride)) /
                           2;

        // The following code disables auto stretch.  Kept for reference.
        // scale draw area for a 1 to 1 pixel mapping with the draw target
        // float vScale = static_cast<float>(fbHeight) / static_cast<float>(s_backbuffer_height);
        // float hScale = static_cast<float>(fbWidth) / static_cast<float>(s_backbuffer_width);
        // drawRc.top *= vScale;
        // drawRc.bottom *= vScale;
        // drawRc.left *= hScale;
        // drawRc.right *= hScale;

        source_rc.right -= Renderer::EFBToScaledX(fb_stride - fb_width);
      }

      BlitScreen(source_rc, drawRc, xfb_source->m_tex, xfb_source->texWidth, xfb_source->texHeight,
                 gamma);
    }
  }
  else
  {
    TargetRectangle source_rc = Renderer::ConvertEFBRectangle(rc);

    // EXISTINGD3D11TODO: Improve sampling algorithm for the pixel shader so that we can use the
    // multisampled EFB texture as source
    D3DTexture2D* read_texture = FramebufferManager::GetResolvedEFBColorTexture();

    BlitScreen(source_rc, target_rc, read_texture, GetTargetWidth(), GetTargetHeight(), gamma);
  }

  // Dump frames
  if (IsFrameDumping())
  {
    if (!s_screenshot_texture)
      CreateScreenshotTexture();

    D3D12_BOX source_box = GetScreenshotSourceBox(target_rc);

    unsigned int source_width = source_box.right - source_box.left;
    unsigned int source_height = source_box.bottom - source_box.top;

    D3D12_TEXTURE_COPY_LOCATION dst_location = {};
    dst_location.pResource = s_screenshot_texture;
    dst_location.Type = D3D12_TEXTURE_COPY_TYPE_PLACED_FOOTPRINT;
    dst_location.PlacedFootprint.Offset = 0;
    dst_location.PlacedFootprint.Footprint.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
    dst_location.PlacedFootprint.Footprint.Width = GetTargetRectangle().GetWidth();
    dst_location.PlacedFootprint.Footprint.Height = GetTargetRectangle().GetHeight();
    dst_location.PlacedFootprint.Footprint.Depth = 1;
    dst_location.PlacedFootprint.Footprint.RowPitch = D3D::AlignValue(
        dst_location.PlacedFootprint.Footprint.Width * 4, D3D12_TEXTURE_DATA_PITCH_ALIGNMENT);

    D3D12_TEXTURE_COPY_LOCATION src_location = {};
    src_location.Type = D3D12_TEXTURE_COPY_TYPE_SUBRESOURCE_INDEX;
    src_location.SubresourceIndex = 0;
    src_location.pResource = D3D::GetBackBuffer()->GetTex12();

    D3D::GetBackBuffer()->TransitionToResourceState(D3D::current_command_list,
                                                    D3D12_RESOURCE_STATE_COPY_SOURCE);
    D3D::current_command_list->CopyTextureRegion(&dst_location, 0, 0, 0, &src_location,
                                                 &source_box);

    D3D::command_list_mgr->ExecuteQueuedWork(true);

    void* screenshot_texture_map;
    D3D12_RANGE read_range = {0, dst_location.PlacedFootprint.Footprint.RowPitch * source_height};
    CheckHR(s_screenshot_texture->Map(0, &read_range, &screenshot_texture_map));

    DumpFrameData(reinterpret_cast<const u8*>(screenshot_texture_map), source_width, source_height,
                  dst_location.PlacedFootprint.Footprint.RowPitch, ticks);
    FinishFrameData();

    D3D12_RANGE write_range = {};
    s_screenshot_texture->Unmap(0, &write_range);
  }

  // Reset viewport for drawing text
  D3D::SetViewportAndScissor(0, 0, GetBackbufferWidth(), GetBackbufferHeight());

  Renderer::DrawDebugText();

  OSD::DrawMessages();
  D3D::EndFrame();

  TextureCacheBase::Cleanup(frameCount);

  // Enable configuration changes
  UpdateActiveConfig();
  TextureCacheBase::OnConfigChanged(g_ActiveConfig);

  SetWindowSize(fb_stride, fb_height);

  const bool window_resized = CheckForResize();
  const bool fullscreen = g_ActiveConfig.bFullscreen && !g_ActiveConfig.bBorderlessFullscreen &&
                          !SConfig::GetInstance().bRenderToMain;

  bool xfb_changed = s_last_xfb_mode != g_ActiveConfig.bUseRealXFB;

  if (FramebufferManagerBase::LastXfbWidth() != fb_stride ||
      FramebufferManagerBase::LastXfbHeight() != fb_height)
  {
    xfb_changed = true;
    unsigned int xfb_w = (fb_stride < 1 || fb_stride > MAX_XFB_WIDTH) ? MAX_XFB_WIDTH : fb_stride;
    unsigned int xfb_h = (fb_height < 1 || fb_height > MAX_XFB_HEIGHT) ? MAX_XFB_HEIGHT : fb_height;
    FramebufferManagerBase::SetLastXfbWidth(xfb_w);
    FramebufferManagerBase::SetLastXfbHeight(xfb_h);
  }

  // Flip/present backbuffer to frontbuffer here
  D3D::Present();

  // Resize the back buffers NOW to avoid flickering
  if (CalculateTargetSize(s_backbuffer_width, s_backbuffer_height) || xfb_changed ||
      window_resized || s_last_efb_scale != g_ActiveConfig.iEFBScale ||
      s_last_multisamples != g_ActiveConfig.iMultisamples ||
      s_last_stereo_mode != (g_ActiveConfig.iStereoMode > 0))
  {
    s_last_xfb_mode = g_ActiveConfig.bUseRealXFB;

    // Block on any changes until the GPU catches up, so we can free resources safely.
    D3D::command_list_mgr->ExecuteQueuedWork(true);

    if (s_last_multisamples != g_ActiveConfig.iMultisamples)
    {
      s_last_multisamples = g_ActiveConfig.iMultisamples;
      StaticShaderCache::InvalidateMSAAShaders();
      gx_state_cache.OnMSAASettingsChanged();
    }

    if (window_resized)
    {
      // TODO: Aren't we still holding a reference to the back buffer right now?
      D3D::Reset();

      if (s_screenshot_texture)
      {
        D3D::command_list_mgr->DestroyResourceAfterCurrentCommandListExecuted(s_screenshot_texture);
        s_screenshot_texture = nullptr;
      }

      s_backbuffer_width = D3D::GetBackBufferWidth();
      s_backbuffer_height = D3D::GetBackBufferHeight();
    }

    UpdateDrawRectangle(s_backbuffer_width, s_backbuffer_height);

    s_last_efb_scale = g_ActiveConfig.iEFBScale;
    s_last_stereo_mode = g_ActiveConfig.iStereoMode > 0;

    PixelShaderManager::SetEfbScaleChanged();

    D3D::GetBackBuffer()->TransitionToResourceState(D3D::current_command_list,
                                                    D3D12_RESOURCE_STATE_RENDER_TARGET);
    D3D::current_command_list->OMSetRenderTargets(1, &D3D::GetBackBuffer()->GetRTV12(), FALSE,
                                                  nullptr);

    g_framebuffer_manager.reset();
    g_framebuffer_manager = std::make_unique<FramebufferManager>();
    const float clear_color[4] = {0.f, 0.f, 0.f, 1.f};

    FramebufferManager::GetEFBColorTexture()->TransitionToResourceState(
        D3D::current_command_list, D3D12_RESOURCE_STATE_RENDER_TARGET);
    D3D::current_command_list->ClearRenderTargetView(
        FramebufferManager::GetEFBColorTexture()->GetRTV12(), clear_color, 0, nullptr);

    FramebufferManager::GetEFBDepthTexture()->TransitionToResourceState(
        D3D::current_command_list, D3D12_RESOURCE_STATE_DEPTH_WRITE);
    D3D::current_command_list->ClearDepthStencilView(
        FramebufferManager::GetEFBDepthTexture()->GetDSV12(), D3D12_CLEAR_FLAG_DEPTH, 0.f, 0, 0,
        nullptr);
  }

  // begin next frame
  D3D::BeginFrame();

  FramebufferManager::GetEFBColorTexture()->TransitionToResourceState(
      D3D::current_command_list, D3D12_RESOURCE_STATE_RENDER_TARGET);
  FramebufferManager::GetEFBDepthTexture()->TransitionToResourceState(
      D3D::current_command_list, D3D12_RESOURCE_STATE_DEPTH_WRITE);

  RestoreAPIState();
}

void Renderer::ResetAPIState()
{
  CHECK(0, "This should never be called.. just required for inheritance.");
}

void Renderer::RestoreAPIState()
{
  // Restores viewport/scissor rects, which might have been
  // overwritten elsewhere (particularly the viewport).
  SetViewport();
  BPFunctions::SetScissor();

  FramebufferManager::RestoreEFBRenderTargets();
  BBox::Bind();
}

static bool s_previous_use_dst_alpha = false;
static D3DVertexFormat* s_previous_vertex_format = nullptr;

void Renderer::ApplyState(bool use_dst_alpha)
{
  if (use_dst_alpha != s_previous_use_dst_alpha)
  {
    s_previous_use_dst_alpha = use_dst_alpha;
    D3D::command_list_mgr->SetCommandListDirtyState(COMMAND_LIST_STATE_PSO, true);
  }

  gx_state.blend.use_dst_alpha = use_dst_alpha;

  if (D3D::command_list_mgr->GetCommandListDirtyState(COMMAND_LIST_STATE_SAMPLERS))
  {
    D3D12_GPU_DESCRIPTOR_HANDLE sample_group_gpu_handle;
    sample_group_gpu_handle =
        D3D::sampler_descriptor_heap_mgr->GetHandleForSamplerGroup(gx_state.sampler, 8);

    D3D::current_command_list->SetGraphicsRootDescriptorTable(DESCRIPTOR_TABLE_PS_SAMPLER,
                                                              sample_group_gpu_handle);

    D3D::command_list_mgr->SetCommandListDirtyState(COMMAND_LIST_STATE_SAMPLERS, false);
  }

  // Uploads and binds required constant buffer data for all stages.
  ShaderConstantsManager::LoadAndSetGeometryShaderConstants();
  ShaderConstantsManager::LoadAndSetPixelShaderConstants();
  ShaderConstantsManager::LoadAndSetVertexShaderConstants();

  if (D3D::command_list_mgr->GetCommandListDirtyState(COMMAND_LIST_STATE_PSO) ||
      s_previous_vertex_format !=
          reinterpret_cast<D3DVertexFormat*>(VertexLoaderManager::GetCurrentVertexFormat()))
  {
    s_previous_vertex_format =
        reinterpret_cast<D3DVertexFormat*>(VertexLoaderManager::GetCurrentVertexFormat());

    D3D12_PRIMITIVE_TOPOLOGY_TYPE topologyType = ShaderCache::GetCurrentPrimitiveTopology();
    RasterizerState modifiableRastState = gx_state.raster;

    if (topologyType != D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE)
    {
      modifiableRastState.cull_mode = D3D12_CULL_MODE_NONE;
    }

    SmallPsoDesc pso_desc = {
        ShaderCache::GetActiveGeometryShaderBytecode(),  // D3D12_SHADER_BYTECODE GS;
        ShaderCache::GetActivePixelShaderBytecode(),     // D3D12_SHADER_BYTECODE PS;
        ShaderCache::GetActiveVertexShaderBytecode(),    // D3D12_SHADER_BYTECODE VS;
        s_previous_vertex_format,                        // D3DVertexFormat* InputLayout;
        gx_state.blend,                                  // BlendState BlendState;
        modifiableRastState,                             // RasterizerState RasterizerState;
        gx_state.zmode,                                  // ZMode DepthStencilState;
    };

    if (use_dst_alpha)
    {
      // restore actual state
      SetBlendMode(false);
      SetLogicOpMode();
    }

    ID3D12PipelineState* pso = nullptr;
    CheckHR(gx_state_cache.GetPipelineStateObjectFromCache(
        &pso_desc, &pso, topologyType, ShaderCache::GetActiveGeometryShaderUid(),
        ShaderCache::GetActivePixelShaderUid(), ShaderCache::GetActiveVertexShaderUid()));

    D3D::current_command_list->SetPipelineState(pso);

    D3D::command_list_mgr->SetCommandListDirtyState(COMMAND_LIST_STATE_PSO, false);
  }

  // Always called prior to drawing, so we can invalidate the CPU EFB copies here.
  FramebufferManager::InvalidateEFBAccessCopies();
}

void Renderer::RestoreState()
{
}

void Renderer::ApplyCullDisable()
{
  // This functionality is handled directly in ApplyState.
}

void Renderer::RestoreCull()
{
  // This functionality is handled directly in ApplyState.
}

void Renderer::SetGenerationMode()
{
  const D3D12_CULL_MODE d3d_cull_modes[4] = {D3D12_CULL_MODE_NONE, D3D12_CULL_MODE_BACK,
                                             D3D12_CULL_MODE_FRONT, D3D12_CULL_MODE_BACK};

  // rastdc.FrontCounterClockwise must be false for this to work
  // EXISTINGD3D11TODO: GX_CULL_ALL not supported, yet!
  gx_state.raster.cull_mode = d3d_cull_modes[bpmem.genMode.cullmode];

  D3D::command_list_mgr->SetCommandListDirtyState(COMMAND_LIST_STATE_PSO, true);
}

void Renderer::SetDepthMode()
{
  gx_state.zmode.hex = bpmem.zmode.hex;

  D3D::command_list_mgr->SetCommandListDirtyState(COMMAND_LIST_STATE_PSO, true);
}

void Renderer::SetLogicOpMode()
{
  // D3D11 doesn't support logic blending, so this is a huge hack
  // EXISTINGD3D11TODO: Make use of D3D11.1's logic blending support
  // D3D12TODO: Obviously these are always available in D3D12..

  // 0   0x00
  // 1   Source & destination
  // 2   Source & ~destination
  // 3   Source
  // 4   ~Source & destination
  // 5   Destination
  // 6   Source ^ destination =  Source & ~destination | ~Source & destination
  // 7   Source | destination
  // 8   ~(Source | destination)
  // 9   ~(Source ^ destination) = ~Source & ~destination | Source & destination
  // 10  ~Destination
  // 11  Source | ~destination
  // 12  ~Source
  // 13  ~Source | destination
  // 14  ~(Source & destination)
  // 15  0xff
  const D3D12_BLEND_OP d3d_logic_ops[16] = {
      D3D12_BLEND_OP_ADD,           // 0
      D3D12_BLEND_OP_ADD,           // 1
      D3D12_BLEND_OP_SUBTRACT,      // 2
      D3D12_BLEND_OP_ADD,           // 3
      D3D12_BLEND_OP_REV_SUBTRACT,  // 4
      D3D12_BLEND_OP_ADD,           // 5
      D3D12_BLEND_OP_MAX,           // 6
      D3D12_BLEND_OP_ADD,           // 7
      D3D12_BLEND_OP_MAX,           // 8
      D3D12_BLEND_OP_MAX,           // 9
      D3D12_BLEND_OP_ADD,           // 10
      D3D12_BLEND_OP_ADD,           // 11
      D3D12_BLEND_OP_ADD,           // 12
      D3D12_BLEND_OP_ADD,           // 13
      D3D12_BLEND_OP_ADD,           // 14
      D3D12_BLEND_OP_ADD            // 15
  };
  const D3D12_BLEND d3d_logic_op_src_factors[16] = {
      D3D12_BLEND_ZERO,            // 0
      D3D12_BLEND_DEST_COLOR,      // 1
      D3D12_BLEND_ONE,             // 2
      D3D12_BLEND_ONE,             // 3
      D3D12_BLEND_DEST_COLOR,      // 4
      D3D12_BLEND_ZERO,            // 5
      D3D12_BLEND_INV_DEST_COLOR,  // 6
      D3D12_BLEND_INV_DEST_COLOR,  // 7
      D3D12_BLEND_INV_SRC_COLOR,   // 8
      D3D12_BLEND_INV_SRC_COLOR,   // 9
      D3D12_BLEND_INV_DEST_COLOR,  // 10
      D3D12_BLEND_ONE,             // 11
      D3D12_BLEND_INV_SRC_COLOR,   // 12
      D3D12_BLEND_INV_SRC_COLOR,   // 13
      D3D12_BLEND_INV_DEST_COLOR,  // 14
      D3D12_BLEND_ONE              // 15
  };
  const D3D12_BLEND d3d_logic_op_dest_factors[16] = {
      D3D12_BLEND_ZERO,            // 0
      D3D12_BLEND_ZERO,            // 1
      D3D12_BLEND_INV_SRC_COLOR,   // 2
      D3D12_BLEND_ZERO,            // 3
      D3D12_BLEND_ONE,             // 4
      D3D12_BLEND_ONE,             // 5
      D3D12_BLEND_INV_SRC_COLOR,   // 6
      D3D12_BLEND_ONE,             // 7
      D3D12_BLEND_INV_DEST_COLOR,  // 8
      D3D12_BLEND_SRC_COLOR,       // 9
      D3D12_BLEND_INV_DEST_COLOR,  // 10
      D3D12_BLEND_INV_DEST_COLOR,  // 11
      D3D12_BLEND_INV_SRC_COLOR,   // 12
      D3D12_BLEND_ONE,             // 13
      D3D12_BLEND_INV_SRC_COLOR,   // 14
      D3D12_BLEND_ONE              // 15
  };

  if (bpmem.blendmode.logicopenable && !bpmem.blendmode.blendenable)
  {
    gx_state.blend.blend_enable = true;
    gx_state.blend.blend_op = d3d_logic_ops[bpmem.blendmode.logicmode];
    gx_state.blend.src_blend = d3d_logic_op_src_factors[bpmem.blendmode.logicmode];
    gx_state.blend.dst_blend = d3d_logic_op_dest_factors[bpmem.blendmode.logicmode];
  }
  else
  {
    SetBlendMode(true);
  }

  D3D::command_list_mgr->SetCommandListDirtyState(COMMAND_LIST_STATE_PSO, true);
}

void Renderer::SetDitherMode()
{
  // EXISTINGD3D11TODO: Set dither mode to bpmem.blendmode.dither
}

void Renderer::SetSamplerState(int stage, int tex_index, bool custom_tex)
{
  const FourTexUnits& tex = bpmem.tex[tex_index];
  const TexMode0& tm0 = tex.texMode0[stage];
  const TexMode1& tm1 = tex.texMode1[stage];
  SamplerState new_state = {};

  if (tex_index)
    stage += 4;

  if (g_ActiveConfig.bForceFiltering)
  {
    // Only use mipmaps if the game says they are available.
    new_state.min_filter = SamplerCommon::AreBpTexMode0MipmapsEnabled(tm0) ? 6 : 4;
    new_state.mag_filter = 1;  // linear mag
  }
  else
  {
    new_state.min_filter = tm0.min_filter;
    new_state.mag_filter = tm0.mag_filter;
  }

  new_state.wrap_s = tm0.wrap_s;
  new_state.wrap_t = tm0.wrap_t;
  new_state.max_lod = tm1.max_lod;
  new_state.min_lod = tm1.min_lod;
  new_state.lod_bias = tm0.lod_bias;

  // custom textures may have higher resolution, so disable the max_lod
  if (custom_tex)
  {
    new_state.max_lod = 255;
  }

  if (new_state.hex != gx_state.sampler[stage].hex)
  {
    gx_state.sampler[stage].hex = new_state.hex;
    D3D::command_list_mgr->SetCommandListDirtyState(COMMAND_LIST_STATE_SAMPLERS, true);
  }
}

void Renderer::SetInterlacingMode()
{
  // EXISTINGD3D11TODO
}

u32 Renderer::GetMaxTextureSize()
{
  return DX12::D3D::GetMaxTextureSize();
}

u16 Renderer::BBoxRead(int index)
{
  // Here we get the min/max value of the truncated position of the upscaled framebuffer.
  // So we have to correct them to the unscaled EFB sizes.
  int value = BBox::Get(index);

  if (index < 2)
  {
    // left/right
    value = value * EFB_WIDTH / s_target_width;
  }
  else
  {
    // up/down
    value = value * EFB_HEIGHT / s_target_height;
  }
  if (index & 1)
    value++;  // fix max values to describe the outer border

  return value;
}

void Renderer::BBoxWrite(int index, u16 value)
{
  int local_value = value;  // u16 isn't enough to multiply by the efb width
  if (index & 1)
    local_value--;
  if (index < 2)
  {
    local_value = local_value * s_target_width / EFB_WIDTH;
  }
  else
  {
    local_value = local_value * s_target_height / EFB_HEIGHT;
  }

  BBox::Set(index, local_value);
}

void Renderer::BlitScreen(TargetRectangle src, TargetRectangle dst, D3DTexture2D* src_texture,
                          u32 src_width, u32 src_height, float gamma)
{
  if (g_ActiveConfig.iStereoMode == STEREO_SBS || g_ActiveConfig.iStereoMode == STEREO_TAB)
  {
    TargetRectangle left_rc, right_rc;
    ConvertStereoRectangle(dst, left_rc, right_rc);

    // Swap chain backbuffer is never multisampled..

    D3D::SetViewportAndScissor(left_rc.left, left_rc.top, left_rc.GetWidth(), left_rc.GetHeight());
    D3D::DrawShadedTexQuad(src_texture, src.AsRECT(), src_width, src_height,
                           StaticShaderCache::GetColorCopyPixelShader(false),
                           StaticShaderCache::GetSimpleVertexShader(),
                           StaticShaderCache::GetSimpleVertexShaderInputLayout(),
                           D3D12_SHADER_BYTECODE(), gamma, 0, DXGI_FORMAT_R8G8B8A8_UNORM, false,
                           false);

    D3D::SetViewportAndScissor(right_rc.left, right_rc.top, right_rc.GetWidth(),
                               right_rc.GetHeight());
    D3D::DrawShadedTexQuad(src_texture, src.AsRECT(), src_width, src_height,
                           StaticShaderCache::GetColorCopyPixelShader(false),
                           StaticShaderCache::GetSimpleVertexShader(),
                           StaticShaderCache::GetSimpleVertexShaderInputLayout(),
                           D3D12_SHADER_BYTECODE(), gamma, 1, DXGI_FORMAT_R8G8B8A8_UNORM, false,
                           false);
  }
  else if (g_ActiveConfig.iStereoMode == STEREO_3DVISION)
  {
    // D3D12TODO
    // Not currently supported on D3D12 backend. Implemented (but untested) code kept for reference.

    // if (!s_3d_vision_texture)
    //	Create3DVisionTexture(s_backbuffer_width, s_backbuffer_height);

    // D3D12_VIEWPORT leftVp12 = { static_cast<float>(dst.left), static_cast<float>(dst.top),
    // static_cast<float>(dst.GetWidth()), static_cast<float>(dst.GetHeight()), D3D12_MIN_DEPTH,
    // D3D12_MAX_DEPTH };
    // D3D12_VIEWPORT rightVp12 = { static_cast<float>(dst.left + s_backbuffer_width),
    // static_cast<float>(dst.top), static_cast<float>(dst.GetWidth()),
    // static_cast<float>(dst.GetHeight()), D3D12_MIN_DEPTH, D3D12_MAX_DEPTH };

    //// Render to staging texture which is double the width of the backbuffer
    // s_3d_vision_texture->TransitionToResourceState(D3D::current_command_list,
    // D3D12_RESOURCE_STATE_RENDER_TARGET);
    // D3D::current_command_list->OMSetRenderTargets(1, &s_3d_vision_texture->GetRTV12(), FALSE,
    // nullptr);

    // D3D::current_command_list->RSSetViewports(1, &leftVp12);
    // D3D::DrawShadedTexQuad(src_texture, src.AsRECT(), src_width, src_height,
    // StaticShaderCache::GetColorCopyPixelShader(false),
    // StaticShaderCache::GetSimpleVertexShader(),
    // StaticShaderCache::GetSimpleVertexShaderInputLayout(), D3D12_SHADER_BYTECODE(), gamma, 0,
    // DXGI_FORMAT_R8G8B8A8_UNORM, false, s_3d_vision_texture->GetMultisampled());

    // D3D::current_command_list->RSSetViewports(1, &rightVp12);
    // D3D::DrawShadedTexQuad(src_texture, src.AsRECT(), src_width, src_height,
    // StaticShaderCache::GetColorCopyPixelShader(false),
    // StaticShaderCache::GetSimpleVertexShader(),
    // StaticShaderCache::GetSimpleVertexShaderInputLayout(), D3D12_SHADER_BYTECODE(), gamma, 1,
    // DXGI_FORMAT_R8G8B8A8_UNORM, false, s_3d_vision_texture->GetMultisampled());

    //// Copy the left eye to the backbuffer, if Nvidia 3D Vision is enabled it should
    //// recognize the signature and automatically include the right eye frame.
    //// D3D12TODO: Does this work on D3D12?

    // D3D12_BOX box = CD3DX12_BOX(0, 0, 0, s_backbuffer_width, s_backbuffer_height, 1);
    // D3D12_TEXTURE_COPY_LOCATION dst =
    // CD3DX12_TEXTURE_COPY_LOCATION(D3D::GetBackBuffer()->GetTex12(), 0);
    // D3D12_TEXTURE_COPY_LOCATION src =
    // CD3DX12_TEXTURE_COPY_LOCATION(s_3d_vision_texture->GetTex12(), 0);

    // D3D::GetBackBuffer()->TransitionToResourceState(D3D::current_command_list,
    // D3D12_RESOURCE_STATE_COPY_DEST);
    // s_3d_vision_texture->TransitionToResourceState(D3D::current_command_list,
    // D3D12_RESOURCE_STATE_COPY_SOURCE);
    // D3D::current_command_list->CopyTextureRegion(&dst, 0, 0, 0, &src, &box);

    //// Restore render target to backbuffer
    // D3D::GetBackBuffer()->TransitionToResourceState(D3D::current_command_list,
    // D3D12_RESOURCE_STATE_RENDER_TARGET);
    // D3D::current_command_list->OMSetRenderTargets(1, &D3D::GetBackBuffer()->GetRTV12(), FALSE,
    // nullptr);
  }
  else
  {
    D3D::SetViewportAndScissor(dst.left, dst.top, dst.GetWidth(), dst.GetHeight());

    D3D::DrawShadedTexQuad(src_texture, src.AsRECT(), src_width, src_height,
                           (g_Config.iStereoMode == STEREO_ANAGLYPH) ?
                               StaticShaderCache::GetAnaglyphPixelShader() :
                               StaticShaderCache::GetColorCopyPixelShader(false),
                           StaticShaderCache::GetSimpleVertexShader(),
                           StaticShaderCache::GetSimpleVertexShaderInputLayout(),
                           D3D12_SHADER_BYTECODE(), gamma, 0, DXGI_FORMAT_R8G8B8A8_UNORM, false,
                           false  // Backbuffer never multisampled.
                           );
  }
}

D3D12_BLEND_DESC Renderer::GetResetBlendDesc()
{
  return g_reset_blend_desc;
}

D3D12_DEPTH_STENCIL_DESC Renderer::GetResetDepthStencilDesc()
{
  return g_reset_depth_desc;
}

D3D12_RASTERIZER_DESC Renderer::GetResetRasterizerDesc()
{
  return g_reset_rast_desc;
}

}  // namespace DX12