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

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• Hash : 7aea7e05
  Author :
  Date : 2016-05-10T10:39:45
  

  Add EGLImplFactory.
  
  Also rename ImplFactory to GLImplFactory.
  
  This will allow us to use the same factory design pattern for EGL
  objects, and to use State helper classes to share data with Impls.
  
  BUG=angleproject:1363
  BUG=angleproject:1369
  
  Change-Id: I07a8fe40838d5d4ca32b04910c306edeab4d25a7
  Reviewed-on: https://chromium-review.googlesource.com/342051
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• 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/ContextState.h"
  #include "libANGLE/renderer/CompilerImpl.h"
  #include "libANGLE/renderer/GLImplFactory.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::GLImplFactory *implFactory, const ContextState &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;
      mResources.NV_EGL_stream_consumer_external = extensions.eglStreamConsumerExternal;
      // 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
  

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