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

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• Author : Ian Elliott
  Date : 2019-02-01 15:43:59
  Hash : 3d6e3004
  Message : Implement EGL_ANDROID_recordable for Vulkan back-end. This initial implementation provides the extension, and always answers that the ANativeWindow is not recordable. BUG=angleproject:2511 Change-Id: Id3c57351dd1029bff7adf7166f9c82eee6e634b3 Reviewed-on: https://chromium-review.googlesource.com/c/1412507 Commit-Queue: Ian Elliott <ianelliott@google.com> Reviewed-by: Geoff Lang <geofflang@chromium.org>

• src/libANGLE/Config.cpp

• //
  // Copyright (c) 2002-2010 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.
  //
  
  // Config.cpp: Implements the egl::Config class, describing the format, type
  // and size for an egl::Surface. Implements EGLConfig and related functionality.
  // [EGL 1.5] section 3.4 page 19.
  
  #include "libANGLE/Config.h"
  #include "libANGLE/AttributeMap.h"
  
  #include <algorithm>
  #include <vector>
  
  #include <EGL/eglext.h>
  #include "angle_gl.h"
  
  #include "common/debug.h"
  
  namespace egl
  {
  
  Config::Config()
      : renderTargetFormat(GL_NONE),
        depthStencilFormat(GL_NONE),
        bufferSize(0),
        redSize(0),
        greenSize(0),
        blueSize(0),
        luminanceSize(0),
        alphaSize(0),
        alphaMaskSize(0),
        bindToTextureRGB(EGL_FALSE),
        bindToTextureRGBA(EGL_FALSE),
        colorBufferType(EGL_NONE),
        configCaveat(EGL_NONE),
        configID(0),
        conformant(0),
        depthSize(0),
        level(0),
        matchNativePixmap(EGL_FALSE),
        maxPBufferWidth(0),
        maxPBufferHeight(0),
        maxPBufferPixels(0),
        maxSwapInterval(0),
        minSwapInterval(0),
        nativeRenderable(EGL_FALSE),
        nativeVisualID(0),
        nativeVisualType(0),
        renderableType(0),
        sampleBuffers(0),
        samples(0),
        stencilSize(0),
        surfaceType(0),
        transparentType(EGL_NONE),
        transparentRedValue(0),
        transparentGreenValue(0),
        transparentBlueValue(0),
        optimalOrientation(0),
        colorComponentType(EGL_COLOR_COMPONENT_TYPE_FIXED_EXT),
        recordable(EGL_FALSE)
  {}
  
  Config::~Config() {}
  
  Config::Config(const Config &other) = default;
  
  Config &Config::operator=(const Config &other) = default;
  
  ConfigSet::ConfigSet() = default;
  
  ConfigSet::ConfigSet(const ConfigSet &other) = default;
  
  ConfigSet &ConfigSet::operator=(const ConfigSet &other) = default;
  
  ConfigSet::~ConfigSet() = default;
  
  EGLint ConfigSet::add(const Config &config)
  {
      // Set the config's ID to a small number that starts at 1 ([EGL 1.5] section 3.4)
      EGLint id = static_cast<EGLint>(mConfigs.size()) + 1;
  
      Config copyConfig(config);
      copyConfig.configID = id;
      mConfigs.insert(std::make_pair(id, copyConfig));
  
      return id;
  }
  
  const Config &ConfigSet::get(EGLint id) const
  {
      ASSERT(mConfigs.find(id) != mConfigs.end());
      return mConfigs.find(id)->second;
  }
  
  void ConfigSet::clear()
  {
      mConfigs.clear();
  }
  
  size_t ConfigSet::size() const
  {
      return mConfigs.size();
  }
  
  bool ConfigSet::contains(const Config *config) const
  {
      for (auto i = mConfigs.begin(); i != mConfigs.end(); i++)
      {
          const Config &item = i->second;
          if (config == &item)
          {
              return true;
          }
      }
  
      return false;
  }
  
  // Function object used by STL sorting routines for ordering Configs according to [EGL 1.5]
  // section 3.4.1.2 page 28.
  class ConfigSorter
  {
    public:
      explicit ConfigSorter(const AttributeMap &attributeMap)
          : mWantRed(false),
            mWantGreen(false),
            mWantBlue(false),
            mWantAlpha(false),
            mWantLuminance(false)
      {
          scanForWantedComponents(attributeMap);
      }
  
      bool operator()(const Config *x, const Config *y) const { return (*this)(*x, *y); }
  
      bool operator()(const Config &x, const Config &y) const
      {
  #define SORT(attribute)                       \
      do                                        \
      {                                         \
          if (x.attribute != y.attribute)       \
              return x.attribute < y.attribute; \
      } while (0)
  
          static_assert(EGL_NONE < EGL_SLOW_CONFIG && EGL_SLOW_CONFIG < EGL_NON_CONFORMANT_CONFIG,
                        "Unexpected EGL enum value.");
          SORT(configCaveat);
  
          static_assert(EGL_COLOR_COMPONENT_TYPE_FIXED_EXT < EGL_COLOR_COMPONENT_TYPE_FLOAT_EXT,
                        "Unexpected order of EGL enums.");
          SORT(colorComponentType);
  
          static_assert(EGL_RGB_BUFFER < EGL_LUMINANCE_BUFFER, "Unexpected EGL enum value.");
          SORT(colorBufferType);
  
          // By larger total number of color bits, only considering those that are requested to be >
          // 0.
          EGLint xComponentsSize = wantedComponentsSize(x);
          EGLint yComponentsSize = wantedComponentsSize(y);
          if (xComponentsSize != yComponentsSize)
          {
              return xComponentsSize > yComponentsSize;
          }
  
          SORT(bufferSize);
          SORT(sampleBuffers);
          SORT(samples);
          SORT(depthSize);
          SORT(stencilSize);
          SORT(alphaMaskSize);
          SORT(nativeVisualType);
          SORT(configID);
  
  #undef SORT
  
          return false;
      }
  
    private:
      static bool wantsComponent(const AttributeMap &attributeMap, EGLAttrib component)
      {
          // [EGL 1.5] section 3.4.1.2 page 30
          // Sorting rule #3: by larger total number of color bits, not considering
          // components that are 0 or don't-care.
          EGLAttrib value = attributeMap.get(component, 0);
          return value != 0 && value != EGL_DONT_CARE;
      }
  
      void scanForWantedComponents(const AttributeMap &attributeMap)
      {
          mWantRed       = wantsComponent(attributeMap, EGL_RED_SIZE);
          mWantGreen     = wantsComponent(attributeMap, EGL_GREEN_SIZE);
          mWantBlue      = wantsComponent(attributeMap, EGL_BLUE_SIZE);
          mWantAlpha     = wantsComponent(attributeMap, EGL_ALPHA_SIZE);
          mWantLuminance = wantsComponent(attributeMap, EGL_LUMINANCE_SIZE);
      }
  
      EGLint wantedComponentsSize(const Config &config) const
      {
          EGLint total = 0;
  
          if (mWantRed)
              total += config.redSize;
          if (mWantGreen)
              total += config.greenSize;
          if (mWantBlue)
              total += config.blueSize;
          if (mWantAlpha)
              total += config.alphaSize;
          if (mWantLuminance)
              total += config.luminanceSize;
  
          return total;
      }
  
      bool mWantRed;
      bool mWantGreen;
      bool mWantBlue;
      bool mWantAlpha;
      bool mWantLuminance;
  };
  
  std::vector<const Config *> ConfigSet::filter(const AttributeMap &attributeMap) const
  {
      std::vector<const Config *> result;
      result.reserve(mConfigs.size());
  
      for (auto configIter = mConfigs.begin(); configIter != mConfigs.end(); configIter++)
      {
          const Config &config = configIter->second;
          bool match           = true;
  
          for (auto attribIter = attributeMap.begin(); attribIter != attributeMap.end(); attribIter++)
          {
              EGLAttrib attributeKey   = attribIter->first;
              EGLAttrib attributeValue = attribIter->second;
  
              if (attributeValue == EGL_DONT_CARE)
              {
                  continue;
              }
  
              switch (attributeKey)
              {
                  case EGL_BUFFER_SIZE:
                      match = config.bufferSize >= attributeValue;
                      break;
                  case EGL_ALPHA_SIZE:
                      match = config.alphaSize >= attributeValue;
                      break;
                  case EGL_BLUE_SIZE:
                      match = config.blueSize >= attributeValue;
                      break;
                  case EGL_GREEN_SIZE:
                      match = config.greenSize >= attributeValue;
                      break;
                  case EGL_RED_SIZE:
                      match = config.redSize >= attributeValue;
                      break;
                  case EGL_DEPTH_SIZE:
                      match = config.depthSize >= attributeValue;
                      break;
                  case EGL_STENCIL_SIZE:
                      match = config.stencilSize >= attributeValue;
                      break;
                  case EGL_CONFIG_CAVEAT:
                      match = config.configCaveat == static_cast<EGLenum>(attributeValue);
                      break;
                  case EGL_CONFIG_ID:
                      match = config.configID == attributeValue;
                      break;
                  case EGL_LEVEL:
                      match = config.level >= attributeValue;
                      break;
                  case EGL_NATIVE_RENDERABLE:
                      match = config.nativeRenderable == static_cast<EGLBoolean>(attributeValue);
                      break;
                  case EGL_NATIVE_VISUAL_TYPE:
                      match = config.nativeVisualType == attributeValue;
                      break;
                  case EGL_SAMPLES:
                      match = config.samples >= attributeValue;
                      break;
                  case EGL_SAMPLE_BUFFERS:
                      match = config.sampleBuffers >= attributeValue;
                      break;
                  case EGL_SURFACE_TYPE:
                      match = (config.surfaceType & attributeValue) == attributeValue;
                      break;
                  case EGL_TRANSPARENT_TYPE:
                      match = config.transparentType == static_cast<EGLenum>(attributeValue);
                      break;
                  case EGL_TRANSPARENT_BLUE_VALUE:
                      match = config.transparentBlueValue == attributeValue;
                      break;
                  case EGL_TRANSPARENT_GREEN_VALUE:
                      match = config.transparentGreenValue == attributeValue;
                      break;
                  case EGL_TRANSPARENT_RED_VALUE:
                      match = config.transparentRedValue == attributeValue;
                      break;
                  case EGL_BIND_TO_TEXTURE_RGB:
                      match = config.bindToTextureRGB == static_cast<EGLBoolean>(attributeValue);
                      break;
                  case EGL_BIND_TO_TEXTURE_RGBA:
                      match = config.bindToTextureRGBA == static_cast<EGLBoolean>(attributeValue);
                      break;
                  case EGL_MIN_SWAP_INTERVAL:
                      match = config.minSwapInterval == attributeValue;
                      break;
                  case EGL_MAX_SWAP_INTERVAL:
                      match = config.maxSwapInterval == attributeValue;
                      break;
                  case EGL_LUMINANCE_SIZE:
                      match = config.luminanceSize >= attributeValue;
                      break;
                  case EGL_ALPHA_MASK_SIZE:
                      match = config.alphaMaskSize >= attributeValue;
                      break;
                  case EGL_COLOR_BUFFER_TYPE:
                      match = config.colorBufferType == static_cast<EGLenum>(attributeValue);
                      break;
                  case EGL_RENDERABLE_TYPE:
                      match = (config.renderableType & attributeValue) == attributeValue;
                      break;
                  case EGL_MATCH_NATIVE_PIXMAP:
                      match = false;
                      UNIMPLEMENTED();
                      break;
                  case EGL_CONFORMANT:
                      match = (config.conformant & attributeValue) == attributeValue;
                      break;
                  case EGL_MAX_PBUFFER_WIDTH:
                      match = config.maxPBufferWidth >= attributeValue;
                      break;
                  case EGL_MAX_PBUFFER_HEIGHT:
                      match = config.maxPBufferHeight >= attributeValue;
                      break;
                  case EGL_MAX_PBUFFER_PIXELS:
                      match = config.maxPBufferPixels >= attributeValue;
                      break;
                  case EGL_OPTIMAL_SURFACE_ORIENTATION_ANGLE:
                      match = config.optimalOrientation == attributeValue;
                      break;
                  case EGL_COLOR_COMPONENT_TYPE_EXT:
                      match = config.colorComponentType == static_cast<EGLenum>(attributeValue);
                      break;
                  case EGL_RECORDABLE_ANDROID:
                      match = config.recordable == static_cast<EGLBoolean>(attributeValue);
                      break;
                  default:
                      UNREACHABLE();
              }
  
              if (!match)
              {
                  break;
              }
          }
  
          if (match)
          {
              result.push_back(&config);
          }
      }
  
      // Sort the result
      std::sort(result.begin(), result.end(), ConfigSorter(attributeMap));
  
      return result;
  }
  
  ConfigSet::ConfigMap::iterator ConfigSet::begin()
  {
      return mConfigs.begin();
  }
  
  ConfigSet::ConfigMap::iterator ConfigSet::end()
  {
      return mConfigs.end();
  }
  }  // namespace egl