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

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• Hash : fe28ca06
  Author :
  Date : 2013-06-04T10:10:48
  

  Added table entries for reading colors from D3D and DXGI formats and writing colors to format/type combinations.
  
  TRAC #23256
  
  Signed-off-by: Jamie Madill
  Signed-off-by: Shannon Woods
  Author: Geoff Lang
  

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• src/libEGL/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 1.4] section 3.4 page 15.
  
  #include "libEGL/Config.h"
  
  #include <algorithm>
  #include <vector>
  
  #include <GLES3/gl3.h>
  #include <GLES3/gl3ext.h>
  #include <GLES2/gl2.h>
  #include <GLES2/gl2ext.h>
  #include <EGL/eglext.h>
  
  #include "common/debug.h"
  
  using namespace std;
  
  namespace egl
  {
  Config::Config(rx::ConfigDesc desc, EGLint minInterval, EGLint maxInterval, EGLint texWidth, EGLint texHeight)
      : mRenderTargetFormat(desc.renderTargetFormat), mDepthStencilFormat(desc.depthStencilFormat), mMultiSample(desc.multiSample)
  {
      mBindToTextureRGB = EGL_FALSE;
      mBindToTextureRGBA = EGL_FALSE;
      switch (desc.renderTargetFormat)
      {
        case GL_RGB5_A1:
          mBufferSize = 16;
          mRedSize = 5;
          mGreenSize = 5;
          mBlueSize = 5;
          mAlphaSize = 1;
          break;
        case GL_BGR5_A1_ANGLEX:
          mBufferSize = 16;
          mRedSize = 5;
          mGreenSize = 5;
          mBlueSize = 5;
          mAlphaSize = 1;
          break;
        case GL_RGBA8_OES:
          mBufferSize = 32;
          mRedSize = 8;
          mGreenSize = 8;
          mBlueSize = 8;
          mAlphaSize = 8;
          mBindToTextureRGBA = true;
          break;
        case GL_RGB565:
          mBufferSize = 16;
          mRedSize = 5;
          mGreenSize = 6;
          mBlueSize = 5;
          mAlphaSize = 0;
          break;
        case GL_RGB8_OES:
          mBufferSize = 32;
          mRedSize = 8;
          mGreenSize = 8;
          mBlueSize = 8;
          mAlphaSize = 0;
          mBindToTextureRGB = true;
          break;
        case GL_BGRA8_EXT:
          mBufferSize = 32;
          mRedSize = 8;
          mGreenSize = 8;
          mBlueSize = 8;
          mAlphaSize = 8;
          mBindToTextureRGBA = true;
          break;
        default:
          UNREACHABLE();   // Other formats should not be valid
      }
  
      mLuminanceSize = 0;
      mAlphaMaskSize = 0;
      mColorBufferType = EGL_RGB_BUFFER;
      mConfigCaveat = (desc.fastConfig) ? EGL_NONE : EGL_SLOW_CONFIG;
      mConfigID = 0;
      mConformant = EGL_OPENGL_ES2_BIT;
  
      switch (desc.depthStencilFormat)
      {
        case GL_NONE:
          mDepthSize = 0;
          mStencilSize = 0;
          break;
        case GL_DEPTH_COMPONENT32_OES:
          mDepthSize = 32;
          mStencilSize = 0;
          break;
        case GL_DEPTH24_STENCIL8_OES:
          mDepthSize = 24;
          mStencilSize = 8;
          break;
        case GL_DEPTH_COMPONENT24_OES:
          mDepthSize = 24;
          mStencilSize = 0;
          break;
        case GL_DEPTH_COMPONENT16:
          mDepthSize = 16;
          mStencilSize = 0;
          break;
        default:
          UNREACHABLE();
      }
  
      mLevel = 0;
      mMatchNativePixmap = EGL_NONE;
      mMaxPBufferWidth = texWidth;
      mMaxPBufferHeight = texHeight;
      mMaxPBufferPixels = texWidth*texHeight;
      mMaxSwapInterval = maxInterval;
      mMinSwapInterval = minInterval;
      mNativeRenderable = EGL_FALSE;
      mNativeVisualID = 0;
      mNativeVisualType = 0;
      mRenderableType = EGL_OPENGL_ES2_BIT;
      mSampleBuffers = desc.multiSample ? 1 : 0;
      mSamples = desc.multiSample;
      mSurfaceType = EGL_PBUFFER_BIT | EGL_WINDOW_BIT | EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
      mTransparentType = EGL_NONE;
      mTransparentRedValue = 0;
      mTransparentGreenValue = 0;
      mTransparentBlueValue = 0;
  
      if (desc.es3Capable)
      {
          mRenderableType |= EGL_OPENGL_ES3_BIT_KHR;
          mConformant |= EGL_OPENGL_ES3_BIT_KHR;
      }
  }
  
  EGLConfig Config::getHandle() const
  {
      return (EGLConfig)(size_t)mConfigID;
  }
  
  SortConfig::SortConfig(const EGLint *attribList)
      : mWantRed(false), mWantGreen(false), mWantBlue(false), mWantAlpha(false), mWantLuminance(false)
  {
      scanForWantedComponents(attribList);
  }
  
  void SortConfig::scanForWantedComponents(const EGLint *attribList)
  {
      // [EGL] section 3.4.1 page 24
      // Sorting rule #3: by larger total number of color bits, not considering
      // components that are 0 or don't-care.
      for (const EGLint *attr = attribList; attr[0] != EGL_NONE; attr += 2)
      {
          if (attr[1] != 0 && attr[1] != EGL_DONT_CARE)
          {
              switch (attr[0])
              {
                case EGL_RED_SIZE:       mWantRed = true; break;
                case EGL_GREEN_SIZE:     mWantGreen = true; break;
                case EGL_BLUE_SIZE:      mWantBlue = true; break;
                case EGL_ALPHA_SIZE:     mWantAlpha = true; break;
                case EGL_LUMINANCE_SIZE: mWantLuminance = true; break;
              }
          }
      }
  }
  
  EGLint SortConfig::wantedComponentsSize(const Config &config) const
  {
      EGLint total = 0;
  
      if (mWantRed)       total += config.mRedSize;
      if (mWantGreen)     total += config.mGreenSize;
      if (mWantBlue)      total += config.mBlueSize;
      if (mWantAlpha)     total += config.mAlphaSize;
      if (mWantLuminance) total += config.mLuminanceSize;
  
      return total;
  }
  
  bool SortConfig::operator()(const Config *x, const Config *y) const
  {
      return (*this)(*x, *y);
  }
  
  bool SortConfig::operator()(const Config &x, const Config &y) const
  {
      #define SORT(attribute)                        \
          if (x.attribute != y.attribute)            \
          {                                          \
              return x.attribute < y.attribute;      \
          }
  
      META_ASSERT(EGL_NONE < EGL_SLOW_CONFIG && EGL_SLOW_CONFIG < EGL_NON_CONFORMANT_CONFIG);
      SORT(mConfigCaveat);
  
      META_ASSERT(EGL_RGB_BUFFER < EGL_LUMINANCE_BUFFER);
      SORT(mColorBufferType);
  
      // 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(mBufferSize);
      SORT(mSampleBuffers);
      SORT(mSamples);
      SORT(mDepthSize);
      SORT(mStencilSize);
      SORT(mAlphaMaskSize);
      SORT(mNativeVisualType);
      SORT(mConfigID);
  
      #undef SORT
  
      return false;
  }
  
  // We'd like to use SortConfig to also eliminate duplicate configs.
  // This works as long as we never have two configs with different per-RGB-component layouts,
  // but the same total.
  // 5551 and 565 are different because R+G+B is different.
  // 5551 and 555 are different because bufferSize is different.
  const EGLint ConfigSet::mSortAttribs[] =
  {
      EGL_RED_SIZE, 1,
      EGL_GREEN_SIZE, 1,
      EGL_BLUE_SIZE, 1,
      EGL_LUMINANCE_SIZE, 1,
      // BUT NOT ALPHA
      EGL_NONE
  };
  
  ConfigSet::ConfigSet()
      : mSet(SortConfig(mSortAttribs))
  {
  }
  
  void ConfigSet::add(rx::ConfigDesc desc, EGLint minSwapInterval, EGLint maxSwapInterval, EGLint texWidth, EGLint texHeight)
  {
      Config config(desc, minSwapInterval, maxSwapInterval, texWidth, texHeight);
      mSet.insert(config);
  }
  
  size_t ConfigSet::size() const
  {
      return mSet.size();
  }
  
  bool ConfigSet::getConfigs(EGLConfig *configs, const EGLint *attribList, EGLint configSize, EGLint *numConfig)
  {
      vector<const Config*> passed;
      passed.reserve(mSet.size());
  
      for (Iterator config = mSet.begin(); config != mSet.end(); config++)
      {
          bool match = true;
          const EGLint *attribute = attribList;
  
          while (attribute[0] != EGL_NONE)
          {
              switch (attribute[0])
              {
                case EGL_BUFFER_SIZE:               match = config->mBufferSize >= attribute[1];                      break;
                case EGL_ALPHA_SIZE:                match = config->mAlphaSize >= attribute[1];                       break;
                case EGL_BLUE_SIZE:                 match = config->mBlueSize >= attribute[1];                        break;
                case EGL_GREEN_SIZE:                match = config->mGreenSize >= attribute[1];                       break;
                case EGL_RED_SIZE:                  match = config->mRedSize >= attribute[1];                         break;
                case EGL_DEPTH_SIZE:                match = config->mDepthSize >= attribute[1];                       break;
                case EGL_STENCIL_SIZE:              match = config->mStencilSize >= attribute[1];                     break;
                case EGL_CONFIG_CAVEAT:             match = config->mConfigCaveat == (EGLenum) attribute[1];          break;
                case EGL_CONFIG_ID:                 match = config->mConfigID == attribute[1];                        break;
                case EGL_LEVEL:                     match = config->mLevel >= attribute[1];                           break;
                case EGL_NATIVE_RENDERABLE:         match = config->mNativeRenderable == (EGLBoolean) attribute[1];   break;
                case EGL_NATIVE_VISUAL_TYPE:        match = config->mNativeVisualType == attribute[1];                break;
                case EGL_SAMPLES:                   match = config->mSamples >= attribute[1];                         break;
                case EGL_SAMPLE_BUFFERS:            match = config->mSampleBuffers >= attribute[1];                   break;
                case EGL_SURFACE_TYPE:              match = (config->mSurfaceType & attribute[1]) == attribute[1];    break;
                case EGL_TRANSPARENT_TYPE:          match = config->mTransparentType == (EGLenum) attribute[1];       break;
                case EGL_TRANSPARENT_BLUE_VALUE:    match = config->mTransparentBlueValue == attribute[1];            break;
                case EGL_TRANSPARENT_GREEN_VALUE:   match = config->mTransparentGreenValue == attribute[1];           break;
                case EGL_TRANSPARENT_RED_VALUE:     match = config->mTransparentRedValue == attribute[1];             break;
                case EGL_BIND_TO_TEXTURE_RGB:       match = config->mBindToTextureRGB == (EGLBoolean) attribute[1];   break;
                case EGL_BIND_TO_TEXTURE_RGBA:      match = config->mBindToTextureRGBA == (EGLBoolean) attribute[1];  break;
                case EGL_MIN_SWAP_INTERVAL:         match = config->mMinSwapInterval == attribute[1];                 break;
                case EGL_MAX_SWAP_INTERVAL:         match = config->mMaxSwapInterval == attribute[1];                 break;
                case EGL_LUMINANCE_SIZE:            match = config->mLuminanceSize >= attribute[1];                   break;
                case EGL_ALPHA_MASK_SIZE:           match = config->mAlphaMaskSize >= attribute[1];                   break;
                case EGL_COLOR_BUFFER_TYPE:         match = config->mColorBufferType == (EGLenum) attribute[1];       break;
                case EGL_RENDERABLE_TYPE:           match = (config->mRenderableType & attribute[1]) == attribute[1]; break;
                case EGL_MATCH_NATIVE_PIXMAP:       match = false; UNIMPLEMENTED();                                   break;
                case EGL_CONFORMANT:                match = (config->mConformant & attribute[1]) == attribute[1];     break;
                case EGL_MAX_PBUFFER_WIDTH:         match = config->mMaxPBufferWidth >= attribute[1];                 break;
                case EGL_MAX_PBUFFER_HEIGHT:        match = config->mMaxPBufferHeight >= attribute[1];                break;
                case EGL_MAX_PBUFFER_PIXELS:        match = config->mMaxPBufferPixels >= attribute[1];                break;
                default:
                  return false;
              }
  
              if (!match)
              {
                  break;
              }
  
              attribute += 2;
          }
  
          if (match)
          {
              passed.push_back(&*config);
          }
      }
  
      if (configs)
      {
          sort(passed.begin(), passed.end(), SortConfig(attribList));
  
          EGLint index;
          for (index = 0; index < configSize && index < static_cast<EGLint>(passed.size()); index++)
          {
              configs[index] = passed[index]->getHandle();
          }
  
          *numConfig = index;
      }
      else
      {
          *numConfig = passed.size();
      }
  
      return true;
  }
  
  const egl::Config *ConfigSet::get(EGLConfig configHandle)
  {
      for (Iterator config = mSet.begin(); config != mSet.end(); config++)
      {
          if (config->getHandle() == configHandle)
          {
              return &(*config);
          }
      }
  
      return NULL;
  }
  }
  

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