kc3-lang/angle/src/libANGLE/renderer/d3d/CompilerD3D.cpp

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• Author : Jamie Madill
  Date : 2015-04-01 16:15:32
  Hash : f4bf3811
  Message : Use GetAs/GetImplAs whenever possible. This patch cleans up the rest of our custom casting helper functions. Change-Id: I41975c736765fca855c4498acca31116df3e8317 Reviewed-on: https://chromium-review.googlesource.com/263477 Tested-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Brandon Jones <bajones@chromium.org>

• src/libANGLE/renderer/d3d/CompilerD3D.cpp

• //
  // Copyright (c) 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.
  //
  
  // CompilerD3D.cpp: Implementation of the rx::CompilerD3D class.
  
  #include "libANGLE/renderer/d3d/CompilerD3D.h"
  
  #include "libANGLE/Caps.h"
  #include "libANGLE/Data.h"
  
  #include "common/debug.h"
  
  namespace rx
  {
  
  // Global count of active shader compiler handles. Needed to know when to call ShInitialize and ShFinalize.
  static size_t activeCompilerHandles = 0;
  
  CompilerD3D::CompilerD3D(const gl::Data &data, ShShaderOutput outputType)
      : mSpec(data.clientVersion > 2 ? SH_GLES3_SPEC : SH_GLES2_SPEC),
        mOutputType(outputType),
        mResources(),
        mFragmentCompiler(NULL),
        mVertexCompiler(NULL)
  {
      ASSERT(data.clientVersion == 2 || data.clientVersion == 3);
  
      const gl::Caps &caps = *data.caps;
      const gl::Extensions &extensions = *data.extensions;
  
      ShInitBuiltInResources(&mResources);
      mResources.MaxVertexAttribs = caps.maxVertexAttributes;
      mResources.MaxVertexUniformVectors = caps.maxVertexUniformVectors;
      mResources.MaxVaryingVectors = caps.maxVaryingVectors;
      mResources.MaxVertexTextureImageUnits = caps.maxVertexTextureImageUnits;
      mResources.MaxCombinedTextureImageUnits = caps.maxCombinedTextureImageUnits;
      mResources.MaxTextureImageUnits = caps.maxTextureImageUnits;
      mResources.MaxFragmentUniformVectors = caps.maxFragmentUniformVectors;
      mResources.MaxDrawBuffers = caps.maxDrawBuffers;
      mResources.OES_standard_derivatives = extensions.standardDerivatives;
      mResources.EXT_draw_buffers = extensions.drawBuffers;
      mResources.EXT_shader_texture_lod = 1;
      // resources.OES_EGL_image_external = mRenderer->getShareHandleSupport() ? 1 : 0; // TODO: commented out until the extension is actually supported.
      mResources.FragmentPrecisionHigh = 1;   // Shader Model 2+ always supports FP24 (s16e7) which corresponds to highp
      mResources.EXT_frag_depth = 1; // Shader Model 2+ always supports explicit depth output
  
      // GLSL ES 3.0 constants
      mResources.MaxVertexOutputVectors = caps.maxVertexOutputComponents / 4;
      mResources.MaxFragmentInputVectors = caps.maxFragmentInputComponents / 4;
      mResources.MinProgramTexelOffset = caps.minProgramTexelOffset;
      mResources.MaxProgramTexelOffset = caps.maxProgramTexelOffset;
  }
  
  CompilerD3D::~CompilerD3D()
  {
      release();
  }
  
  gl::Error CompilerD3D::release()
  {
      if (mFragmentCompiler)
      {
          ShDestruct(mFragmentCompiler);
          mFragmentCompiler = NULL;
  
          ASSERT(activeCompilerHandles > 0);
          activeCompilerHandles--;
      }
  
      if (mVertexCompiler)
      {
          ShDestruct(mVertexCompiler);
          mVertexCompiler = NULL;
  
          ASSERT(activeCompilerHandles > 0);
          activeCompilerHandles--;
      }
  
      if (activeCompilerHandles == 0)
      {
          ShFinalize();
      }
  
      return gl::Error(GL_NO_ERROR);
  }
  
  ShHandle CompilerD3D::getCompilerHandle(GLenum type)
  {
      ShHandle *compiler = NULL;
      switch (type)
      {
        case GL_VERTEX_SHADER:
          compiler = &mVertexCompiler;
          break;
  
        case GL_FRAGMENT_SHADER:
          compiler = &mFragmentCompiler;
          break;
  
        default:
          UNREACHABLE();
          return NULL;
      }
  
      if (!(*compiler))
      {
          if (activeCompilerHandles == 0)
          {
              ShInitialize();
          }
  
          *compiler = ShConstructCompiler(type, mSpec, mOutputType, &mResources);
          activeCompilerHandles++;
      }
  
      return *compiler;
  }
  
  }