kc3-lang/angle/src/libANGLE/Compiler.cpp

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• Author : Jamie Madill
  Date : 2015-09-23 09:50:36
  Hash : 83f349ea
  Message : Remove CompilerImpl and merge code to gl::Compiler. This class uses no Impl-specific code. We can also do a similar code relocation for the gl::Shader class, but in several steps because it is a bit more complex. BUG=angleproject:1159 Change-Id: I4d3ce3253df0a2bdee1d98e46cfd4b999d86be6e Reviewed-on: https://chromium-review.googlesource.com/299874 Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>

• src/libANGLE/Compiler.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.
  //
  
  // Compiler.cpp: implements the gl::Compiler class.
  
  #include "libANGLE/Compiler.h"
  
  #include "common/debug.h"
  #include "libANGLE/Data.h"
  #include "libANGLE/renderer/CompilerImpl.h"
  #include "libANGLE/renderer/ImplFactory.h"
  
  namespace gl
  {
  
  namespace
  {
  
  // Global count of active shader compiler handles. Needed to know when to call ShInitialize and
  // ShFinalize.
  size_t activeCompilerHandles = 0;
  
  }  // anonymous namespace
  
  Compiler::Compiler(rx::ImplFactory *implFactory, const gl::Data &data)
      : mImplementation(implFactory->createCompiler()),
        mSpec(data.clientVersion > 2 ? SH_GLES3_SPEC : SH_GLES2_SPEC),
        mOutputType(mImplementation->getTranslatorOutputType()),
        mResources(),
        mFragmentCompiler(nullptr),
        mVertexCompiler(nullptr)
  {
      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       = extensions.shaderTextureLOD;
      // TODO: disabled until the extension is actually supported.
      mResources.OES_EGL_image_external = 0;
      // TODO: use shader precision caps to determine if high precision is supported?
      mResources.FragmentPrecisionHigh = 1;
      mResources.EXT_frag_depth        = extensions.fragDepth;
  
      // GLSL ES 3.0 constants
      mResources.MaxVertexOutputVectors  = caps.maxVertexOutputComponents / 4;
      mResources.MaxFragmentInputVectors = caps.maxFragmentInputComponents / 4;
      mResources.MinProgramTexelOffset   = caps.minProgramTexelOffset;
      mResources.MaxProgramTexelOffset   = caps.maxProgramTexelOffset;
  }
  
  Compiler::~Compiler()
  {
      release();
      SafeDelete(mImplementation);
  }
  
  Error Compiler::release()
  {
      if (mFragmentCompiler)
      {
          ShDestruct(mFragmentCompiler);
          mFragmentCompiler = nullptr;
  
          ASSERT(activeCompilerHandles > 0);
          activeCompilerHandles--;
      }
  
      if (mVertexCompiler)
      {
          ShDestruct(mVertexCompiler);
          mVertexCompiler = nullptr;
  
          ASSERT(activeCompilerHandles > 0);
          activeCompilerHandles--;
      }
  
      if (activeCompilerHandles == 0)
      {
          ShFinalize();
      }
  
      mImplementation->release();
  
      return gl::Error(GL_NO_ERROR);
  }
  
  ShHandle Compiler::getCompilerHandle(GLenum type)
  {
      ShHandle *compiler = nullptr;
      switch (type)
      {
          case GL_VERTEX_SHADER:
              compiler = &mVertexCompiler;
              break;
  
          case GL_FRAGMENT_SHADER:
              compiler = &mFragmentCompiler;
              break;
  
          default:
              UNREACHABLE();
              return nullptr;
      }
  
      if (!(*compiler))
      {
          if (activeCompilerHandles == 0)
          {
              ShInitialize();
          }
  
          *compiler = ShConstructCompiler(type, mSpec, mOutputType, &mResources);
          activeCompilerHandles++;
      }
  
      return *compiler;
  }
  
  }  // namespace gl