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

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• Hash : e93d24ef
  Author :
  Date : 2016-07-28T12:06:05
  

  Add es3.1 shader constants
  
  The patch adds all shader built-in constants.
  
  BUG=angleproject:1442
  
  TEST=angle_unittests
  TEST=angle_end2end_tests
  
  Change-Id: I81cae479d6506a8faa2dce023d5fcc2c1291d521
  Reviewed-on: https://chromium-review.googlesource.com/364460
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  

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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;
  
  ShShaderSpec SelectShaderSpec(GLint majorVersion, GLint minorVersion)
  {
      if (majorVersion >= 3)
      {
          if (minorVersion == 1)
          {
              return SH_GLES3_1_SPEC;
          }
          else
          {
              return SH_GLES3_SPEC;
          }
      }
      return SH_GLES2_SPEC;
  }
  
  }  // anonymous namespace
  
  Compiler::Compiler(rx::GLImplFactory *implFactory, const ContextState &state)
      : mImplementation(implFactory->createCompiler()),
        mSpec(SelectShaderSpec(state.getClientMajorVersion(), state.getClientMinorVersion())),
        mOutputType(mImplementation->getTranslatorOutputType()),
        mResources(),
        mFragmentCompiler(nullptr),
        mVertexCompiler(nullptr)
  {
      ASSERT(state.getClientMajorVersion() == 2 || state.getClientMajorVersion() == 3);
  
      const gl::Caps &caps             = state.getCaps();
      const gl::Extensions &extensions = state.getExtensions();
  
      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;
      mResources.OES_EGL_image_external          = extensions.eglImageExternal;
      mResources.OES_EGL_image_external_essl3    = extensions.eglImageExternalEssl3;
      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;
  
      // GLSL ES 3.1 compute shader constants
      mResources.MaxImageUnits                    = caps.maxImageUnits;
      mResources.MaxVertexImageUniforms           = caps.maxVertexImageUniforms;
      mResources.MaxFragmentImageUniforms         = caps.maxFragmentImageUniforms;
      mResources.MaxComputeImageUniforms          = caps.maxComputeImageUniforms;
      mResources.MaxCombinedImageUniforms         = caps.maxCombinedImageUniforms;
      mResources.MaxCombinedShaderOutputResources = caps.maxCombinedShaderOutputResources;
  
      for (size_t index = 0u; index < 3u; ++index)
      {
          mResources.MaxComputeWorkGroupCount[index] = caps.maxComputeWorkGroupCount[index];
          mResources.MaxComputeWorkGroupSize[index]  = caps.maxComputeWorkGroupSize[index];
      }
  
      mResources.MaxComputeUniformComponents = caps.maxComputeUniformComponents;
      mResources.MaxComputeTextureImageUnits = caps.maxComputeTextureImageUnits;
  
      mResources.MaxComputeAtomicCounters       = caps.maxComputeAtomicCounters;
      mResources.MaxComputeAtomicCounterBuffers = caps.maxComputeAtomicCounterBuffers;
  
      mResources.MaxVertexAtomicCounters         = caps.maxVertexAtomicCounters;
      mResources.MaxFragmentAtomicCounters       = caps.maxFragmentAtomicCounters;
      mResources.MaxCombinedAtomicCounters       = caps.maxCombinedAtomicCounters;
      mResources.MaxAtomicCounterBindings        = caps.maxAtomicCounterBufferBindings;
      mResources.MaxVertexAtomicCounterBuffers   = caps.maxVertexAtomicCounterBuffers;
      mResources.MaxFragmentAtomicCounterBuffers = caps.maxFragmentAtomicCounterBuffers;
      mResources.MaxCombinedAtomicCounterBuffers = caps.maxCombinedAtomicCounterBuffers;
      mResources.MaxAtomicCounterBufferSize      = caps.maxAtomicCounterBufferSize;
  }
  
  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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