kc3-lang/angle/src/libANGLE/renderer/d3d/WorkaroundsD3D.h

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• Hash : 6941a556
  Author :
  Date : 2015-07-27T11:06:45
  

  Rename Workarounds to WorkaroundsD3D.
  
  It is not referenced outside of the d3d classes.
  
  BUG=angleproject:884
  
  Change-Id: Ibeec034b1b78b569bea2f1c77d6a686b58b8e010
  Reviewed-on: https://chromium-review.googlesource.com/288582
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Tested-by: Geoff Lang <geofflang@chromium.org>
  

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• src/libANGLE/renderer/d3d/WorkaroundsD3D.h

• //
  // Copyright (c) 2015 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.
  //
  
  // WorkaroundsD3D.h: Workarounds for D3D driver bugs and other issues.
  
  #ifndef LIBANGLE_RENDERER_D3D_WORKAROUNDSD3D_H_
  #define LIBANGLE_RENDERER_D3D_WORKAROUNDSD3D_H_
  
  // TODO(jmadill,zmo,geofflang): make a workarounds library that can operate
  // independent of ANGLE's renderer. Workarounds should also be accessible
  // outside of the Renderer.
  
  namespace rx
  {
  struct D3DCompilerWorkarounds
  {
      D3DCompilerWorkarounds()
          : skipOptimization(false), useMaxOptimization(false), enableIEEEStrictness(false)
      {
      }
  
      bool skipOptimization;
      bool useMaxOptimization;
  
      // IEEE strictness needs to be enabled for NANs to work.
      bool enableIEEEStrictness;
  };
  
  struct WorkaroundsD3D
  {
      WorkaroundsD3D()
          : mrtPerfWorkaround(false),
            setDataFasterThanImageUpload(false),
            zeroMaxLodWorkaround(false),
            useInstancedPointSpriteEmulation(false)
      {
      }
  
      // On some systems, having extra rendertargets than necessary slows down the shader.
      // We can fix this by optimizing those out of the shader. At the same time, we can
      // work around a bug on some nVidia drivers that they ignore "null" render targets
      // in D3D11, by compacting the active color attachments list to omit null entries.
      bool mrtPerfWorkaround;
  
      bool setDataFasterThanImageUpload;
  
      // Some renderers can't disable mipmaps on a mipmapped texture (i.e. solely sample from level
      // zero, and ignore the other levels). D3D11 Feature Level 10+ does this by setting MaxLOD to
      // 0.0f in the Sampler state. D3D9 sets D3DSAMP_MIPFILTER to D3DTEXF_NONE. There is no
      // equivalent to this in D3D11 Feature Level 9_3. This causes problems when (for example) an
      // application creates a mipmapped texture2D, but sets GL_TEXTURE_MIN_FILTER to GL_NEAREST
      // (i.e disables mipmaps). To work around this, D3D11 FL9_3 has to create two copies of the
      // texture. The textures' level zeros are identical, but only one texture has mips.
      bool zeroMaxLodWorkaround;
  
      // Some renderers do not support Geometry Shaders so the Geometry Shader-based PointSprite
      // emulation will not work. To work around this, D3D11 FL9_3 has to use a different pointsprite
      // emulation that is implemented using instanced quads.
      bool useInstancedPointSpriteEmulation;
  };
  }
  
  #endif  // LIBANGLE_RENDERER_D3D_WORKAROUNDSD3D_H_
  

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