kc3-lang/angle/src/libANGLE/renderer/d3d/d3d11/renderer11_utils.cpp

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• Hash : 62342590
  Author :
  Date : 2015-06-18T17:29:52
  

  Revert "Add workaround for flushing before readPixels."
  
  This reverts commit 46c13a15fa90130eca14301a4ef6deed12315037.
  
  Seems to have introduced significant flakiness on the Windows AMD FYI bot. Reverting while investigating.
  
  Change-Id: I9cfdb09a4a0d792a0c5db76c8b0b9d3285c0695a
  Reviewed-on: https://chromium-review.googlesource.com/280365
  Tested-by: Kenneth Russell <kbr@chromium.org>
  Reviewed-by: Kenneth Russell <kbr@chromium.org>
  

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• src/libANGLE/renderer/d3d/d3d11/renderer11_utils.cpp

• //
  // Copyright (c) 2012-2014 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // renderer11_utils.cpp: Conversion functions and other utility routines
  // specific to the D3D11 renderer.
  
  #include "libANGLE/renderer/d3d/d3d11/renderer11_utils.h"
  
  #include <algorithm>
  
  #include "common/debug.h"
  #include "libANGLE/Framebuffer.h"
  #include "libANGLE/Program.h"
  #include "libANGLE/formatutils.h"
  #include "libANGLE/renderer/Workarounds.h"
  #include "libANGLE/renderer/d3d/FramebufferD3D.h"
  #include "libANGLE/renderer/d3d/d3d11/Renderer11.h"
  #include "libANGLE/renderer/d3d/d3d11/RenderTarget11.h"
  #include "libANGLE/renderer/d3d/d3d11/dxgi_support_table.h"
  #include "libANGLE/renderer/d3d/d3d11/formatutils11.h"
  
  namespace rx
  {
  
  namespace gl_d3d11
  {
  
  D3D11_BLEND ConvertBlendFunc(GLenum glBlend, bool isAlpha)
  {
      D3D11_BLEND d3dBlend = D3D11_BLEND_ZERO;
  
      switch (glBlend)
      {
        case GL_ZERO:                     d3dBlend = D3D11_BLEND_ZERO;                break;
        case GL_ONE:                      d3dBlend = D3D11_BLEND_ONE;                 break;
        case GL_SRC_COLOR:                d3dBlend = (isAlpha ? D3D11_BLEND_SRC_ALPHA : D3D11_BLEND_SRC_COLOR);           break;
        case GL_ONE_MINUS_SRC_COLOR:      d3dBlend = (isAlpha ? D3D11_BLEND_INV_SRC_ALPHA : D3D11_BLEND_INV_SRC_COLOR);   break;
        case GL_DST_COLOR:                d3dBlend = (isAlpha ? D3D11_BLEND_DEST_ALPHA : D3D11_BLEND_DEST_COLOR);         break;
        case GL_ONE_MINUS_DST_COLOR:      d3dBlend = (isAlpha ? D3D11_BLEND_INV_DEST_ALPHA : D3D11_BLEND_INV_DEST_COLOR); break;
        case GL_SRC_ALPHA:                d3dBlend = D3D11_BLEND_SRC_ALPHA;           break;
        case GL_ONE_MINUS_SRC_ALPHA:      d3dBlend = D3D11_BLEND_INV_SRC_ALPHA;       break;
        case GL_DST_ALPHA:                d3dBlend = D3D11_BLEND_DEST_ALPHA;          break;
        case GL_ONE_MINUS_DST_ALPHA:      d3dBlend = D3D11_BLEND_INV_DEST_ALPHA;      break;
        case GL_CONSTANT_COLOR:           d3dBlend = D3D11_BLEND_BLEND_FACTOR;        break;
        case GL_ONE_MINUS_CONSTANT_COLOR: d3dBlend = D3D11_BLEND_INV_BLEND_FACTOR;    break;
        case GL_CONSTANT_ALPHA:           d3dBlend = D3D11_BLEND_BLEND_FACTOR;        break;
        case GL_ONE_MINUS_CONSTANT_ALPHA: d3dBlend = D3D11_BLEND_INV_BLEND_FACTOR;    break;
        case GL_SRC_ALPHA_SATURATE:       d3dBlend = D3D11_BLEND_SRC_ALPHA_SAT;       break;
        default: UNREACHABLE();
      }
  
      return d3dBlend;
  }
  
  D3D11_BLEND_OP ConvertBlendOp(GLenum glBlendOp)
  {
      D3D11_BLEND_OP d3dBlendOp = D3D11_BLEND_OP_ADD;
  
      switch (glBlendOp)
      {
        case GL_FUNC_ADD:              d3dBlendOp = D3D11_BLEND_OP_ADD;           break;
        case GL_FUNC_SUBTRACT:         d3dBlendOp = D3D11_BLEND_OP_SUBTRACT;      break;
        case GL_FUNC_REVERSE_SUBTRACT: d3dBlendOp = D3D11_BLEND_OP_REV_SUBTRACT;  break;
        case GL_MIN:                   d3dBlendOp = D3D11_BLEND_OP_MIN;           break;
        case GL_MAX:                   d3dBlendOp = D3D11_BLEND_OP_MAX;           break;
        default: UNREACHABLE();
      }
  
      return d3dBlendOp;
  }
  
  UINT8 ConvertColorMask(bool red, bool green, bool blue, bool alpha)
  {
      UINT8 mask = 0;
      if (red)
      {
          mask |= D3D11_COLOR_WRITE_ENABLE_RED;
      }
      if (green)
      {
          mask |= D3D11_COLOR_WRITE_ENABLE_GREEN;
      }
      if (blue)
      {
          mask |= D3D11_COLOR_WRITE_ENABLE_BLUE;
      }
      if (alpha)
      {
          mask |= D3D11_COLOR_WRITE_ENABLE_ALPHA;
      }
      return mask;
  }
  
  D3D11_CULL_MODE ConvertCullMode(bool cullEnabled, GLenum cullMode)
  {
      D3D11_CULL_MODE cull = D3D11_CULL_NONE;
  
      if (cullEnabled)
      {
          switch (cullMode)
          {
            case GL_FRONT:            cull = D3D11_CULL_FRONT;    break;
            case GL_BACK:             cull = D3D11_CULL_BACK;     break;
            case GL_FRONT_AND_BACK:   cull = D3D11_CULL_NONE;     break;
            default: UNREACHABLE();
          }
      }
      else
      {
          cull = D3D11_CULL_NONE;
      }
  
      return cull;
  }
  
  D3D11_COMPARISON_FUNC ConvertComparison(GLenum comparison)
  {
      D3D11_COMPARISON_FUNC d3dComp = D3D11_COMPARISON_NEVER;
      switch (comparison)
      {
        case GL_NEVER:    d3dComp = D3D11_COMPARISON_NEVER;           break;
        case GL_ALWAYS:   d3dComp = D3D11_COMPARISON_ALWAYS;          break;
        case GL_LESS:     d3dComp = D3D11_COMPARISON_LESS;            break;
        case GL_LEQUAL:   d3dComp = D3D11_COMPARISON_LESS_EQUAL;      break;
        case GL_EQUAL:    d3dComp = D3D11_COMPARISON_EQUAL;           break;
        case GL_GREATER:  d3dComp = D3D11_COMPARISON_GREATER;         break;
        case GL_GEQUAL:   d3dComp = D3D11_COMPARISON_GREATER_EQUAL;   break;
        case GL_NOTEQUAL: d3dComp = D3D11_COMPARISON_NOT_EQUAL;       break;
        default: UNREACHABLE();
      }
  
      return d3dComp;
  }
  
  D3D11_DEPTH_WRITE_MASK ConvertDepthMask(bool depthWriteEnabled)
  {
      return depthWriteEnabled ? D3D11_DEPTH_WRITE_MASK_ALL : D3D11_DEPTH_WRITE_MASK_ZERO;
  }
  
  UINT8 ConvertStencilMask(GLuint stencilmask)
  {
      return static_cast<UINT8>(stencilmask);
  }
  
  D3D11_STENCIL_OP ConvertStencilOp(GLenum stencilOp)
  {
      D3D11_STENCIL_OP d3dStencilOp = D3D11_STENCIL_OP_KEEP;
  
      switch (stencilOp)
      {
        case GL_ZERO:      d3dStencilOp = D3D11_STENCIL_OP_ZERO;      break;
        case GL_KEEP:      d3dStencilOp = D3D11_STENCIL_OP_KEEP;      break;
        case GL_REPLACE:   d3dStencilOp = D3D11_STENCIL_OP_REPLACE;   break;
        case GL_INCR:      d3dStencilOp = D3D11_STENCIL_OP_INCR_SAT;  break;
        case GL_DECR:      d3dStencilOp = D3D11_STENCIL_OP_DECR_SAT;  break;
        case GL_INVERT:    d3dStencilOp = D3D11_STENCIL_OP_INVERT;    break;
        case GL_INCR_WRAP: d3dStencilOp = D3D11_STENCIL_OP_INCR;      break;
        case GL_DECR_WRAP: d3dStencilOp = D3D11_STENCIL_OP_DECR;      break;
        default: UNREACHABLE();
      }
  
      return d3dStencilOp;
  }
  
  D3D11_FILTER ConvertFilter(GLenum minFilter, GLenum magFilter, float maxAnisotropy, GLenum comparisonMode)
  {
      bool comparison = comparisonMode != GL_NONE;
  
      if (maxAnisotropy > 1.0f)
      {
          return D3D11_ENCODE_ANISOTROPIC_FILTER(static_cast<D3D11_COMPARISON_FUNC>(comparison));
      }
      else
      {
          D3D11_FILTER_TYPE dxMin = D3D11_FILTER_TYPE_POINT;
          D3D11_FILTER_TYPE dxMip = D3D11_FILTER_TYPE_POINT;
          switch (minFilter)
          {
            case GL_NEAREST:                dxMin = D3D11_FILTER_TYPE_POINT;  dxMip = D3D11_FILTER_TYPE_POINT;  break;
            case GL_LINEAR:                 dxMin = D3D11_FILTER_TYPE_LINEAR; dxMip = D3D11_FILTER_TYPE_POINT;  break;
            case GL_NEAREST_MIPMAP_NEAREST: dxMin = D3D11_FILTER_TYPE_POINT;  dxMip = D3D11_FILTER_TYPE_POINT;  break;
            case GL_LINEAR_MIPMAP_NEAREST:  dxMin = D3D11_FILTER_TYPE_LINEAR; dxMip = D3D11_FILTER_TYPE_POINT;  break;
            case GL_NEAREST_MIPMAP_LINEAR:  dxMin = D3D11_FILTER_TYPE_POINT;  dxMip = D3D11_FILTER_TYPE_LINEAR; break;
            case GL_LINEAR_MIPMAP_LINEAR:   dxMin = D3D11_FILTER_TYPE_LINEAR; dxMip = D3D11_FILTER_TYPE_LINEAR; break;
            default:                        UNREACHABLE();
          }
  
          D3D11_FILTER_TYPE dxMag = D3D11_FILTER_TYPE_POINT;
          switch (magFilter)
          {
            case GL_NEAREST: dxMag = D3D11_FILTER_TYPE_POINT;  break;
            case GL_LINEAR:  dxMag = D3D11_FILTER_TYPE_LINEAR; break;
            default:         UNREACHABLE();
          }
  
          return D3D11_ENCODE_BASIC_FILTER(dxMin, dxMag, dxMip, static_cast<D3D11_COMPARISON_FUNC>(comparison));
      }
  }
  
  D3D11_TEXTURE_ADDRESS_MODE ConvertTextureWrap(GLenum wrap)
  {
      switch (wrap)
      {
        case GL_REPEAT:          return D3D11_TEXTURE_ADDRESS_WRAP;
        case GL_CLAMP_TO_EDGE:   return D3D11_TEXTURE_ADDRESS_CLAMP;
        case GL_MIRRORED_REPEAT: return D3D11_TEXTURE_ADDRESS_MIRROR;
        default:                 UNREACHABLE();
      }
  
      return D3D11_TEXTURE_ADDRESS_WRAP;
  }
  
  D3D11_QUERY ConvertQueryType(GLenum queryType)
  {
      switch (queryType)
      {
        case GL_ANY_SAMPLES_PASSED_EXT:
        case GL_ANY_SAMPLES_PASSED_CONSERVATIVE_EXT:   return D3D11_QUERY_OCCLUSION;
        case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN: return D3D11_QUERY_SO_STATISTICS;
        default: UNREACHABLE();                        return D3D11_QUERY_EVENT;
      }
  }
  
  }
  
  
  namespace d3d11_gl
  {
  
  namespace
  {
  
  // Helper functor for querying DXGI support. Saves passing the parameters repeatedly.
  class DXGISupportHelper : angle::NonCopyable
  {
    public:
      DXGISupportHelper(ID3D11Device *device, D3D_FEATURE_LEVEL featureLevel)
          : mDevice(device),
            mFeatureLevel(featureLevel)
      {
      }
  
      bool query(DXGI_FORMAT dxgiFormat, UINT supportMask)
      {
          if (dxgiFormat == DXGI_FORMAT_UNKNOWN)
              return false;
  
          auto dxgiSupport = d3d11::GetDXGISupport(dxgiFormat, mFeatureLevel);
  
          UINT supportedBits = dxgiSupport.alwaysSupportedFlags;
  
          if ((dxgiSupport.optionallySupportedFlags & supportMask) != 0)
          {
              UINT formatSupport;
              if (SUCCEEDED(mDevice->CheckFormatSupport(dxgiFormat, &formatSupport)))
              {
                  supportedBits |= (formatSupport & supportMask);
              }
              else
              {
                  // TODO(jmadill): find out why we fail this call sometimes in FL9_3
                  // ERR("Error checking format support for format 0x%x", dxgiFormat);
              }
          }
  
          return ((supportedBits & supportMask) == supportMask);
      }
  
    private:
      ID3D11Device *mDevice;
      D3D_FEATURE_LEVEL mFeatureLevel;
  };
  
  } // anonymous namespace
  
  GLint GetMaximumClientVersion(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return 3;
  
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 2;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static gl::TextureCaps GenerateTextureFormatCaps(GLint maxClientVersion, GLenum internalFormat, ID3D11Device *device, const Renderer11DeviceCaps &renderer11DeviceCaps)
  {
      gl::TextureCaps textureCaps;
  
      DXGISupportHelper support(device, renderer11DeviceCaps.featureLevel);
      const d3d11::TextureFormat &formatInfo =
          d3d11::GetTextureFormatInfo(internalFormat, renderer11DeviceCaps);
  
      const gl::InternalFormat &internalFormatInfo = gl::GetInternalFormatInfo(internalFormat);
  
      UINT texSupportMask = D3D11_FORMAT_SUPPORT_TEXTURE2D;
      if (internalFormatInfo.depthBits == 0 && internalFormatInfo.stencilBits == 0)
      {
          texSupportMask |= D3D11_FORMAT_SUPPORT_TEXTURECUBE;
          if (maxClientVersion > 2)
          {
              texSupportMask |= D3D11_FORMAT_SUPPORT_TEXTURE3D;
          }
      }
  
      textureCaps.texturable = support.query(formatInfo.texFormat, texSupportMask);
      textureCaps.filterable = support.query(formatInfo.srvFormat, D3D11_FORMAT_SUPPORT_SHADER_SAMPLE);
      textureCaps.renderable = (support.query(formatInfo.rtvFormat, D3D11_FORMAT_SUPPORT_RENDER_TARGET)) ||
                               (support.query(formatInfo.dsvFormat, D3D11_FORMAT_SUPPORT_DEPTH_STENCIL));
  
      if (support.query(formatInfo.renderFormat, D3D11_FORMAT_SUPPORT_MULTISAMPLE_RENDERTARGET))
      {
          // Assume 1x
          textureCaps.sampleCounts.insert(1);
  
          for (size_t sampleCount = 2; sampleCount <= D3D11_MAX_MULTISAMPLE_SAMPLE_COUNT; sampleCount *= 2)
          {
              UINT qualityCount = 0;
              if (SUCCEEDED(device->CheckMultisampleQualityLevels(formatInfo.renderFormat, sampleCount, &qualityCount)))
              {
                  // Assume we always support lower sample counts
                  if (qualityCount == 0)
                  {
                      break;
                  }
                  textureCaps.sampleCounts.insert(sampleCount);
              }
          }
      }
  
      return textureCaps;
  }
  
  static bool GetNPOTTextureSupport(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return true;
  
          // From http://msdn.microsoft.com/en-us/library/windows/desktop/ff476876.aspx
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return false;
  
        default: UNREACHABLE();      return false;
      }
  }
  
  static float GetMaximumAnisotropy(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_MAX_MAXANISOTROPY;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_MAX_MAXANISOTROPY;
  
          // From http://msdn.microsoft.com/en-us/library/windows/desktop/ff476876.aspx
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:  return 16;
  
        case D3D_FEATURE_LEVEL_9_1:  return D3D_FL9_1_DEFAULT_MAX_ANISOTROPY;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static bool GetOcclusionQuerySupport(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return true;
  
          // From http://msdn.microsoft.com/en-us/library/windows/desktop/ff476150.aspx ID3D11Device::CreateQuery
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:  return true;
        case D3D_FEATURE_LEVEL_9_1:  return false;
  
        default: UNREACHABLE();      return false;
      }
  }
  
  static bool GetEventQuerySupport(D3D_FEATURE_LEVEL featureLevel)
  {
      // From http://msdn.microsoft.com/en-us/library/windows/desktop/ff476150.aspx ID3D11Device::CreateQuery
  
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0:
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return true;
  
        default: UNREACHABLE();      return false;
      }
  }
  
  static bool GetInstancingSupport(D3D_FEATURE_LEVEL featureLevel)
  {
      // From http://msdn.microsoft.com/en-us/library/windows/desktop/ff476150.aspx ID3D11Device::CreateInputLayout
  
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return true;
  
        // Feature Level 9_3 supports instancing, but slot 0 in the input layout must not be instanced.
        // D3D9 has a similar restriction, where stream 0 must not be instanced.
        // This restriction can be worked around by remapping any non-instanced slot to slot 0.
        // This works because HLSL uses shader semantics to match the vertex inputs to the elements in the input layout, rather than the slots.
        // Note that we only support instancing via ANGLE_instanced_array on 9_3, since 9_3 doesn't support OpenGL ES 3.0
        case D3D_FEATURE_LEVEL_9_3:  return true;
  
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return false;
  
        default: UNREACHABLE();      return false;
      }
  }
  
  static bool GetFramebufferMultisampleSupport(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return true;
  
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return false;
  
        default: UNREACHABLE();      return false;
      }
  }
  
  static bool GetFramebufferBlitSupport(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return true;
  
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return false;
  
        default: UNREACHABLE();      return false;
      }
  }
  
  static bool GetDerivativeInstructionSupport(D3D_FEATURE_LEVEL featureLevel)
  {
      // http://msdn.microsoft.com/en-us/library/windows/desktop/bb509588.aspx states that shader model
      // ps_2_x is required for the ddx (and other derivative functions).
  
      // http://msdn.microsoft.com/en-us/library/windows/desktop/ff476876.aspx states that feature level
      // 9.3 supports shader model ps_2_x.
  
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0:
        case D3D_FEATURE_LEVEL_9_3:  return true;
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return false;
  
        default: UNREACHABLE();      return false;
      }
  }
  
  static bool GetShaderTextureLODSupport(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return true;
  
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return false;
  
        default: UNREACHABLE();      return false;
      }
  }
  
  static size_t GetMaximumSimultaneousRenderTargets(D3D_FEATURE_LEVEL featureLevel)
  {
      // From http://msdn.microsoft.com/en-us/library/windows/desktop/ff476150.aspx ID3D11Device::CreateInputLayout
  
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_SIMULTANEOUS_RENDER_TARGET_COUNT;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_SIMULTANEOUS_RENDER_TARGET_COUNT;
  
        case D3D_FEATURE_LEVEL_9_3:  return D3D_FL9_3_SIMULTANEOUS_RENDER_TARGET_COUNT;
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return D3D_FL9_1_SIMULTANEOUS_RENDER_TARGET_COUNT;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximum2DTextureSize(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_REQ_TEXTURE2D_U_OR_V_DIMENSION;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_REQ_TEXTURE2D_U_OR_V_DIMENSION;
  
        case D3D_FEATURE_LEVEL_9_3:  return D3D_FL9_3_REQ_TEXTURE2D_U_OR_V_DIMENSION;
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return D3D_FL9_1_REQ_TEXTURE2D_U_OR_V_DIMENSION;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumCubeMapTextureSize(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_REQ_TEXTURECUBE_DIMENSION;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_REQ_TEXTURECUBE_DIMENSION;
  
        case D3D_FEATURE_LEVEL_9_3:  return D3D_FL9_3_REQ_TEXTURECUBE_DIMENSION;
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return D3D_FL9_1_REQ_TEXTURECUBE_DIMENSION;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximum2DTextureArraySize(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_REQ_TEXTURE2D_ARRAY_AXIS_DIMENSION;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_REQ_TEXTURE2D_ARRAY_AXIS_DIMENSION;
  
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 0;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximum3DTextureSize(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_REQ_TEXTURE3D_U_V_OR_W_DIMENSION;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_REQ_TEXTURE3D_U_V_OR_W_DIMENSION;
  
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return D3D_FL9_1_REQ_TEXTURE3D_U_V_OR_W_DIMENSION;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumViewportSize(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_VIEWPORT_BOUNDS_MAX;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_VIEWPORT_BOUNDS_MAX;
  
        // No constants for D3D11 Feature Level 9 viewport size limits, use the maximum texture sizes
        case D3D_FEATURE_LEVEL_9_3:  return D3D_FL9_3_REQ_TEXTURE2D_U_OR_V_DIMENSION;
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return D3D_FL9_1_REQ_TEXTURE2D_U_OR_V_DIMENSION;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumDrawIndexedIndexCount(D3D_FEATURE_LEVEL featureLevel)
  {
      // D3D11 allows up to 2^32 elements, but we report max signed int for convenience since that's what's
      // returned from glGetInteger
      static_assert(D3D11_REQ_DRAWINDEXED_INDEX_COUNT_2_TO_EXP == 32, "Unexpected D3D11 constant value.");
      static_assert(D3D10_REQ_DRAWINDEXED_INDEX_COUNT_2_TO_EXP == 32, "Unexpected D3D11 constant value.");
  
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return std::numeric_limits<GLint>::max();
  
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:  return D3D_FL9_2_IA_PRIMITIVE_MAX_COUNT;
        case D3D_FEATURE_LEVEL_9_1:  return D3D_FL9_1_IA_PRIMITIVE_MAX_COUNT;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumDrawVertexCount(D3D_FEATURE_LEVEL featureLevel)
  {
      // D3D11 allows up to 2^32 elements, but we report max signed int for convenience since that's what's
      // returned from glGetInteger
      static_assert(D3D11_REQ_DRAW_VERTEX_COUNT_2_TO_EXP == 32, "Unexpected D3D11 constant value.");
      static_assert(D3D10_REQ_DRAW_VERTEX_COUNT_2_TO_EXP == 32, "Unexpected D3D11 constant value.");
  
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return std::numeric_limits<GLint>::max();
  
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:  return D3D_FL9_2_IA_PRIMITIVE_MAX_COUNT;
        case D3D_FEATURE_LEVEL_9_1:  return D3D_FL9_1_IA_PRIMITIVE_MAX_COUNT;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumVertexInputSlots(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_STANDARD_VERTEX_ELEMENT_COUNT;
  
        case D3D_FEATURE_LEVEL_10_1: return D3D10_1_STANDARD_VERTEX_ELEMENT_COUNT;
        case D3D_FEATURE_LEVEL_10_0: return D3D10_STANDARD_VERTEX_ELEMENT_COUNT;
  
        // From http://http://msdn.microsoft.com/en-us/library/windows/desktop/ff476876.aspx "Max Input Slots"
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 16;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumVertexUniformVectors(D3D_FEATURE_LEVEL featureLevel)
  {
      // TODO(geofflang): Remove hard-coded limit once the gl-uniform-arrays test can pass
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return 1024; // D3D11_REQ_CONSTANT_BUFFER_ELEMENT_COUNT;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return 1024; // D3D10_REQ_CONSTANT_BUFFER_ELEMENT_COUNT;
  
        // From http://msdn.microsoft.com/en-us/library/windows/desktop/ff476149.aspx ID3D11DeviceContext::VSSetConstantBuffers
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 255;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetReservedVertexUniformBuffers()
  {
      // Reserve one buffer for the application uniforms, and one for driver uniforms
      return 2;
  }
  
  static size_t GetMaximumVertexUniformBlocks(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_COMMONSHADER_CONSTANT_BUFFER_API_SLOT_COUNT - GetReservedVertexUniformBuffers();
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_COMMONSHADER_CONSTANT_BUFFER_API_SLOT_COUNT - GetReservedVertexUniformBuffers();
  
        // Uniform blocks not supported on D3D11 Feature Level 9
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 0;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetReservedVertexOutputVectors(D3D_FEATURE_LEVEL featureLevel)
  {
      // According to The OpenGL ES Shading Language specifications 
      // (Language Version 1.00 section 10.16, Language Version 3.10 section 12.21)
      // built-in special variables (e.g. gl_FragCoord, or gl_PointCoord)
      // which are statically used in the shader should be included in the variable packing algorithm.
      // Therefore, we should not reserve output vectors for them.
  
      switch (featureLevel)
      {
        // We must reserve one output vector for dx_Position.
        // We also reserve one for gl_Position, which we unconditionally output on Feature Levels 10_0+,
        // even if it's unused in the shader (e.g. for transform feedback). TODO: This could be improved.
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return 2;
  
        // Just reserve dx_Position on Feature Level 9, since we don't ever need to output gl_Position.
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 1;
  
        default: UNREACHABLE();      return 0;
      }
  
      return 1;
  }
  
  static size_t GetMaximumVertexOutputVectors(D3D_FEATURE_LEVEL featureLevel)
  {
      static_assert(gl::IMPLEMENTATION_MAX_VARYING_VECTORS == D3D11_VS_OUTPUT_REGISTER_COUNT, "Unexpected D3D11 constant value.");
  
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_VS_OUTPUT_REGISTER_COUNT - GetReservedVertexOutputVectors(featureLevel);
  
        case D3D_FEATURE_LEVEL_10_1: return D3D10_1_VS_OUTPUT_REGISTER_COUNT - GetReservedVertexOutputVectors(featureLevel);
        case D3D_FEATURE_LEVEL_10_0: return D3D10_VS_OUTPUT_REGISTER_COUNT - GetReservedVertexOutputVectors(featureLevel);
  
        // Use Shader Model 2.X limits
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 8 - GetReservedVertexOutputVectors(featureLevel);
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumVertexTextureUnits(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_COMMONSHADER_SAMPLER_SLOT_COUNT;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_COMMONSHADER_SAMPLER_SLOT_COUNT;
  
        // Vertex textures not supported on D3D11 Feature Level 9 according to
        // http://msdn.microsoft.com/en-us/library/windows/desktop/ff476149.aspx
        // ID3D11DeviceContext::VSSetSamplers and ID3D11DeviceContext::VSSetShaderResources
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 0;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumPixelUniformVectors(D3D_FEATURE_LEVEL featureLevel)
  {
      // TODO(geofflang): Remove hard-coded limit once the gl-uniform-arrays test can pass
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return 1024; // D3D11_REQ_CONSTANT_BUFFER_ELEMENT_COUNT;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return 1024; // D3D10_REQ_CONSTANT_BUFFER_ELEMENT_COUNT;
  
        // From http://msdn.microsoft.com/en-us/library/windows/desktop/ff476149.aspx ID3D11DeviceContext::PSSetConstantBuffers
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 32;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetReservedPixelUniformBuffers()
  {
      // Reserve one buffer for the application uniforms, and one for driver uniforms
      return 2;
  }
  
  static size_t GetMaximumPixelUniformBlocks(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_COMMONSHADER_CONSTANT_BUFFER_API_SLOT_COUNT - GetReservedPixelUniformBuffers();
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_COMMONSHADER_CONSTANT_BUFFER_API_SLOT_COUNT - GetReservedPixelUniformBuffers();
  
        // Uniform blocks not supported on D3D11 Feature Level 9
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 0;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumPixelInputVectors(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_PS_INPUT_REGISTER_COUNT - GetReservedVertexOutputVectors(featureLevel);
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_PS_INPUT_REGISTER_COUNT - GetReservedVertexOutputVectors(featureLevel);
  
        // Use Shader Model 2.X limits
        case D3D_FEATURE_LEVEL_9_3:  return 8 - GetReservedVertexOutputVectors(featureLevel);
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 8 - GetReservedVertexOutputVectors(featureLevel);
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumPixelTextureUnits(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_COMMONSHADER_SAMPLER_SLOT_COUNT;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_COMMONSHADER_SAMPLER_SLOT_COUNT;
  
        // http://msdn.microsoft.com/en-us/library/windows/desktop/ff476149.aspx ID3D11DeviceContext::PSSetShaderResources
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 16;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static int GetMinimumTexelOffset(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_COMMONSHADER_TEXEL_OFFSET_MAX_NEGATIVE;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_COMMONSHADER_TEXEL_OFFSET_MAX_NEGATIVE;
  
        // Sampling functions with offsets are not available below shader model 4.0.
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 0;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static int GetMaximumTexelOffset(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_COMMONSHADER_TEXEL_OFFSET_MAX_POSITIVE;
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D11_COMMONSHADER_TEXEL_OFFSET_MAX_POSITIVE;
  
        // Sampling functions with offsets are not available below shader model 4.0.
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 0;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumConstantBufferSize(D3D_FEATURE_LEVEL featureLevel)
  {
      // Returns a size_t despite the limit being a GLuint64 because size_t is the maximum size of
      // any buffer that could be allocated.
  
      const size_t bytesPerComponent = 4 * sizeof(float);
  
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_REQ_CONSTANT_BUFFER_ELEMENT_COUNT * bytesPerComponent;
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return D3D10_REQ_CONSTANT_BUFFER_ELEMENT_COUNT * bytesPerComponent;
  
        // Limits from http://msdn.microsoft.com/en-us/library/windows/desktop/ff476501.aspx remarks section
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 4096 * bytesPerComponent;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumStreamOutputBuffers(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return D3D11_SO_BUFFER_SLOT_COUNT;
  
        case D3D_FEATURE_LEVEL_10_1: return D3D10_1_SO_BUFFER_SLOT_COUNT;
        case D3D_FEATURE_LEVEL_10_0: return D3D10_SO_BUFFER_SLOT_COUNT;
  
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 0;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumStreamOutputInterleavedComponents(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0:
  
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return GetMaximumVertexOutputVectors(featureLevel) * 4;
  
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 0;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  static size_t GetMaximumStreamOutputSeparateComponents(D3D_FEATURE_LEVEL featureLevel)
  {
      switch (featureLevel)
      {
        case D3D_FEATURE_LEVEL_11_1:
        case D3D_FEATURE_LEVEL_11_0: return GetMaximumStreamOutputInterleavedComponents(featureLevel) /
                                            GetMaximumStreamOutputBuffers(featureLevel);
  
  
        // D3D 10 and 10.1 only allow one output per output slot if an output slot other than zero is used.
        case D3D_FEATURE_LEVEL_10_1:
        case D3D_FEATURE_LEVEL_10_0: return 4;
  
        case D3D_FEATURE_LEVEL_9_3:
        case D3D_FEATURE_LEVEL_9_2:
        case D3D_FEATURE_LEVEL_9_1:  return 0;
  
        default: UNREACHABLE();      return 0;
      }
  }
  
  void GenerateCaps(ID3D11Device *device, ID3D11DeviceContext *deviceContext, const Renderer11DeviceCaps &renderer11DeviceCaps, gl::Caps *caps, gl::TextureCapsMap *textureCapsMap, gl::Extensions *extensions)
  {
      GLuint maxSamples = 0;
      D3D_FEATURE_LEVEL featureLevel = renderer11DeviceCaps.featureLevel;
      const gl::FormatSet &allFormats = gl::GetAllSizedInternalFormats();
      for (gl::FormatSet::const_iterator internalFormat = allFormats.begin(); internalFormat != allFormats.end(); ++internalFormat)
      {
          gl::TextureCaps textureCaps = GenerateTextureFormatCaps(GetMaximumClientVersion(featureLevel), *internalFormat, device, renderer11DeviceCaps);
          textureCapsMap->insert(*internalFormat, textureCaps);
  
          maxSamples = std::max(maxSamples, textureCaps.getMaxSamples());
  
          if (gl::GetInternalFormatInfo(*internalFormat).compressed)
          {
              caps->compressedTextureFormats.push_back(*internalFormat);
          }
      }
  
      // GL core feature limits
      caps->maxElementIndex = static_cast<GLint64>(std::numeric_limits<unsigned int>::max());
      caps->max3DTextureSize = GetMaximum3DTextureSize(featureLevel);
      caps->max2DTextureSize = GetMaximum2DTextureSize(featureLevel);
      caps->maxCubeMapTextureSize = GetMaximumCubeMapTextureSize(featureLevel);
      caps->maxArrayTextureLayers = GetMaximum2DTextureArraySize(featureLevel);
  
      // Unimplemented, set to minimum required
      caps->maxLODBias = 2.0f;
  
      // No specific limits on render target size, maximum 2D texture size is equivalent
      caps->maxRenderbufferSize = caps->max2DTextureSize;
  
      // Maximum draw buffers and color attachments are the same, max color attachments could eventually be
      // increased to 16
      caps->maxDrawBuffers = GetMaximumSimultaneousRenderTargets(featureLevel);
      caps->maxColorAttachments = GetMaximumSimultaneousRenderTargets(featureLevel);
  
      // D3D11 has the same limit for viewport width and height
      caps->maxViewportWidth = GetMaximumViewportSize(featureLevel);
      caps->maxViewportHeight = caps->maxViewportWidth;
  
      // Choose a reasonable maximum, enforced in the shader.
      caps->minAliasedPointSize = 1.0f;
      caps->maxAliasedPointSize = 1024.0f;
  
      // Wide lines not supported
      caps->minAliasedLineWidth = 1.0f;
      caps->maxAliasedLineWidth = 1.0f;
  
      // Primitive count limits
      caps->maxElementsIndices = GetMaximumDrawIndexedIndexCount(featureLevel);
      caps->maxElementsVertices = GetMaximumDrawVertexCount(featureLevel);
  
      // Program and shader binary formats (no supported shader binary formats)
      caps->programBinaryFormats.push_back(GL_PROGRAM_BINARY_ANGLE);
  
      caps->vertexHighpFloat.setIEEEFloat();
      caps->vertexMediumpFloat.setIEEEFloat();
      caps->vertexLowpFloat.setIEEEFloat();
      caps->fragmentHighpFloat.setIEEEFloat();
      caps->fragmentMediumpFloat.setIEEEFloat();
      caps->fragmentLowpFloat.setIEEEFloat();
  
      // 32-bit integers are natively supported
      caps->vertexHighpInt.setTwosComplementInt(32);
      caps->vertexMediumpInt.setTwosComplementInt(32);
      caps->vertexLowpInt.setTwosComplementInt(32);
      caps->fragmentHighpInt.setTwosComplementInt(32);
      caps->fragmentMediumpInt.setTwosComplementInt(32);
      caps->fragmentLowpInt.setTwosComplementInt(32);
  
      // We do not wait for server fence objects internally, so report a max timeout of zero.
      caps->maxServerWaitTimeout = 0;
  
      // Vertex shader limits
      caps->maxVertexAttributes = GetMaximumVertexInputSlots(featureLevel);
      caps->maxVertexUniformComponents = GetMaximumVertexUniformVectors(featureLevel) * 4;
      caps->maxVertexUniformVectors = GetMaximumVertexUniformVectors(featureLevel);
      caps->maxVertexUniformBlocks = GetMaximumVertexUniformBlocks(featureLevel);
      caps->maxVertexOutputComponents = GetMaximumVertexOutputVectors(featureLevel) * 4;
      caps->maxVertexTextureImageUnits = GetMaximumVertexTextureUnits(featureLevel);
  
      // Fragment shader limits
      caps->maxFragmentUniformComponents = GetMaximumPixelUniformVectors(featureLevel) * 4;
      caps->maxFragmentUniformVectors = GetMaximumPixelUniformVectors(featureLevel);
      caps->maxFragmentUniformBlocks = GetMaximumPixelUniformBlocks(featureLevel);
      caps->maxFragmentInputComponents = GetMaximumPixelInputVectors(featureLevel) * 4;
      caps->maxTextureImageUnits = GetMaximumPixelTextureUnits(featureLevel);
      caps->minProgramTexelOffset = GetMinimumTexelOffset(featureLevel);
      caps->maxProgramTexelOffset = GetMaximumTexelOffset(featureLevel);
  
      // Aggregate shader limits
      caps->maxUniformBufferBindings = caps->maxVertexUniformBlocks + caps->maxFragmentUniformBlocks;
      caps->maxUniformBlockSize = GetMaximumConstantBufferSize(featureLevel);
  
      // With DirectX 11.1, constant buffer offset and size must be a multiple of 16 constants of 16 bytes each.
      // https://msdn.microsoft.com/en-us/library/windows/desktop/hh404649%28v=vs.85%29.aspx
      // With DirectX 11.0, we emulate UBO offsets using copies of ranges of the UBO however
      // we still keep the same alignment as 11.1 for consistency.
      caps->uniformBufferOffsetAlignment = 256;
  
      caps->maxCombinedUniformBlocks = caps->maxVertexUniformBlocks + caps->maxFragmentUniformBlocks;
      caps->maxCombinedVertexUniformComponents = (static_cast<GLint64>(caps->maxVertexUniformBlocks) * static_cast<GLint64>(caps->maxUniformBlockSize / 4)) +
                                                 static_cast<GLint64>(caps->maxVertexUniformComponents);
      caps->maxCombinedFragmentUniformComponents = (static_cast<GLint64>(caps->maxFragmentUniformBlocks) * static_cast<GLint64>(caps->maxUniformBlockSize / 4)) +
                                                   static_cast<GLint64>(caps->maxFragmentUniformComponents);
      caps->maxVaryingComponents = GetMaximumVertexOutputVectors(featureLevel) * 4;
      caps->maxVaryingVectors = GetMaximumVertexOutputVectors(featureLevel);
      caps->maxCombinedTextureImageUnits = caps->maxVertexTextureImageUnits + caps->maxTextureImageUnits;
  
      // Transform feedback limits
      caps->maxTransformFeedbackInterleavedComponents = GetMaximumStreamOutputInterleavedComponents(featureLevel);
      caps->maxTransformFeedbackSeparateAttributes = GetMaximumStreamOutputBuffers(featureLevel);
      caps->maxTransformFeedbackSeparateComponents = GetMaximumStreamOutputSeparateComponents(featureLevel);
  
      // Multisample limits
      caps->maxSamples = maxSamples;
  
      // GL extension support
      extensions->setTextureExtensionSupport(*textureCapsMap);
      extensions->elementIndexUint = true;
      extensions->getProgramBinary = true;
      extensions->rgb8rgba8 = true;
      extensions->readFormatBGRA = true;
      extensions->pixelBufferObject = true;
      extensions->mapBuffer = true;
      extensions->mapBufferRange = true;
      extensions->textureNPOT = GetNPOTTextureSupport(featureLevel);
      extensions->drawBuffers = GetMaximumSimultaneousRenderTargets(featureLevel) > 1;
      extensions->textureStorage = true;
      extensions->textureFilterAnisotropic = true;
      extensions->maxTextureAnisotropy = GetMaximumAnisotropy(featureLevel);
      extensions->occlusionQueryBoolean = GetOcclusionQuerySupport(featureLevel);
      extensions->fence = GetEventQuerySupport(featureLevel);
      extensions->timerQuery = false; // Unimplemented
      extensions->robustness = true;
      extensions->blendMinMax = true;
      extensions->framebufferBlit = GetFramebufferBlitSupport(featureLevel);
      extensions->framebufferMultisample = GetFramebufferMultisampleSupport(featureLevel);
      extensions->instancedArrays = GetInstancingSupport(featureLevel);
      extensions->packReverseRowOrder = true;
      extensions->standardDerivatives = GetDerivativeInstructionSupport(featureLevel);
      extensions->shaderTextureLOD = GetShaderTextureLODSupport(featureLevel);
      extensions->fragDepth = true;
      extensions->textureUsage = true; // This could be false since it has no effect in D3D11
      extensions->discardFramebuffer = false; // TODO: enable this once BUG:497445 is fixed (Chrome WebGL video tests fail with this extension active)
      extensions->translatedShaderSource = true;
      extensions->fboRenderMipmap = false;
      extensions->debugMarker = true;
  }
  
  }
  
  namespace d3d11
  {
  
  void MakeValidSize(bool isImage, DXGI_FORMAT format, GLsizei *requestWidth, GLsizei *requestHeight, int *levelOffset)
  {
      const DXGIFormat &dxgiFormatInfo = d3d11::GetDXGIFormatInfo(format);
  
      int upsampleCount = 0;
      // Don't expand the size of full textures that are at least (blockWidth x blockHeight) already.
      if (isImage || *requestWidth  < static_cast<GLsizei>(dxgiFormatInfo.blockWidth) ||
                     *requestHeight < static_cast<GLsizei>(dxgiFormatInfo.blockHeight))
      {
          while (*requestWidth % dxgiFormatInfo.blockWidth != 0 || *requestHeight % dxgiFormatInfo.blockHeight != 0)
          {
              *requestWidth <<= 1;
              *requestHeight <<= 1;
              upsampleCount++;
          }
      }
      *levelOffset = upsampleCount;
  }
  
  void GenerateInitialTextureData(GLint internalFormat, const Renderer11DeviceCaps &renderer11DeviceCaps, GLuint width, GLuint height, GLuint depth,
                                  GLuint mipLevels, std::vector<D3D11_SUBRESOURCE_DATA> *outSubresourceData,
                                  std::vector< std::vector<BYTE> > *outData)
  {
      const d3d11::TextureFormat &d3dFormatInfo = d3d11::GetTextureFormatInfo(internalFormat, renderer11DeviceCaps);
      ASSERT(d3dFormatInfo.dataInitializerFunction != NULL);
  
      const d3d11::DXGIFormat &dxgiFormatInfo = d3d11::GetDXGIFormatInfo(d3dFormatInfo.texFormat);
  
      outSubresourceData->resize(mipLevels);
      outData->resize(mipLevels);
  
      for (unsigned int i = 0; i < mipLevels; i++)
      {
          unsigned int mipWidth = std::max(width >> i, 1U);
          unsigned int mipHeight = std::max(height >> i, 1U);
          unsigned int mipDepth = std::max(depth >> i, 1U);
  
          unsigned int rowWidth = dxgiFormatInfo.pixelBytes * mipWidth;
          unsigned int imageSize = rowWidth * height;
  
          outData->at(i).resize(rowWidth * mipHeight * mipDepth);
          d3dFormatInfo.dataInitializerFunction(mipWidth, mipHeight, mipDepth, outData->at(i).data(), rowWidth, imageSize);
  
          outSubresourceData->at(i).pSysMem = outData->at(i).data();
          outSubresourceData->at(i).SysMemPitch = rowWidth;
          outSubresourceData->at(i).SysMemSlicePitch = imageSize;
      }
  }
  
  void SetPositionTexCoordVertex(PositionTexCoordVertex* vertex, float x, float y, float u, float v)
  {
      vertex->x = x;
      vertex->y = y;
      vertex->u = u;
      vertex->v = v;
  }
  
  void SetPositionLayerTexCoord3DVertex(PositionLayerTexCoord3DVertex* vertex, float x, float y,
                                        unsigned int layer, float u, float v, float s)
  {
      vertex->x = x;
      vertex->y = y;
      vertex->l = layer;
      vertex->u = u;
      vertex->v = v;
      vertex->s = s;
  }
  
  HRESULT SetDebugName(ID3D11DeviceChild *resource, const char *name)
  {
  #if defined(_DEBUG)
      return resource->SetPrivateData(WKPDID_D3DDebugObjectName, strlen(name), name);
  #else
      return S_OK;
  #endif
  }
  
  Workarounds GenerateWorkarounds(D3D_FEATURE_LEVEL featureLevel)
  {
      Workarounds workarounds;
      workarounds.mrtPerfWorkaround = true;
      workarounds.setDataFasterThanImageUpload = true;
      workarounds.zeroMaxLodWorkaround = (featureLevel <= D3D_FEATURE_LEVEL_9_3);
      workarounds.useInstancedPointSpriteEmulation = (featureLevel <= D3D_FEATURE_LEVEL_9_3);
      return workarounds;
  }
  
  }
  
  }
  

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