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

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• Hash : 95738972
  Author :
  Date : 2016-09-13T10:30:57
  

  Specialize GLTypeToGLEnum in headers
  
  BUG=angleproject:1514
  
  Change-Id: I1f95e985471ea7a2ea0242d8b48ceccca68edf42
  Reviewed-on: https://chromium-review.googlesource.com/384891
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Corentin Wallez <cwallez@chromium.org>
  

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• src/libANGLE/queryconversions.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.
  //
  
  // queryconversions.cpp: Implementation of state query cast conversions
  
  #include "libANGLE/queryconversions.h"
  
  #include <vector>
  
  #include "libANGLE/Context.h"
  #include "common/utilities.h"
  
  namespace gl
  {
  
  namespace
  {
  
  GLint64 ExpandFloatToInteger(GLfloat value)
  {
      return static_cast<GLint64>((static_cast<double>(0xFFFFFFFFULL) * value - 1.0) / 2.0);
  }
  
  template <typename QueryT>
  QueryT ClampToQueryRange(GLint64 value)
  {
      const GLint64 min = static_cast<GLint64>(std::numeric_limits<QueryT>::min());
      const GLint64 max = static_cast<GLint64>(std::numeric_limits<QueryT>::max());
      return static_cast<QueryT>(clamp(value, min, max));
  }
  
  template <typename QueryT, typename NativeT>
  QueryT CastStateValueToInt(GLenum pname, NativeT value)
  {
      GLenum queryType  = GLTypeToGLenum<QueryT>::value;
      GLenum nativeType = GLTypeToGLenum<NativeT>::value;
  
      if (nativeType == GL_FLOAT)
      {
          // RGBA color values and DepthRangeF values are converted to integer using Equation 2.4 from Table 4.5
          if (pname == GL_DEPTH_RANGE || pname == GL_COLOR_CLEAR_VALUE || pname == GL_DEPTH_CLEAR_VALUE || pname == GL_BLEND_COLOR)
          {
              return ClampToQueryRange<QueryT>(ExpandFloatToInteger(static_cast<GLfloat>(value)));
          }
          else
          {
              return gl::iround<QueryT>(static_cast<GLfloat>(value));
          }
      }
  
      // Clamp 64-bit int values when casting to int
      if (nativeType == GL_INT_64_ANGLEX && queryType == GL_INT)
      {
          GLint64 minIntValue = static_cast<GLint64>(std::numeric_limits<GLint>::min());
          GLint64 maxIntValue = static_cast<GLint64>(std::numeric_limits<GLint>::max());
          GLint64 clampedValue = std::max(std::min(static_cast<GLint64>(value), maxIntValue), minIntValue);
          return static_cast<QueryT>(clampedValue);
      }
  
      return static_cast<QueryT>(value);
  }
  
  template <typename QueryT, typename NativeT>
  QueryT CastStateValue(GLenum pname, NativeT value)
  {
      GLenum queryType = GLTypeToGLenum<QueryT>::value;
  
      switch (queryType)
      {
          case GL_INT:
              return CastStateValueToInt<QueryT, NativeT>(pname, value);
          case GL_INT_64_ANGLEX:
              return CastStateValueToInt<QueryT, NativeT>(pname, value);
          case GL_FLOAT:
              return static_cast<QueryT>(value);
          case GL_BOOL:
              return static_cast<QueryT>(value == static_cast<NativeT>(0) ? GL_FALSE : GL_TRUE);
          default:
              UNREACHABLE();
              return 0;
      }
  }
  
  }  // anonymous namespace
  
  template <typename QueryT>
  void CastStateValues(Context *context, GLenum nativeType, GLenum pname,
                       unsigned int numParams, QueryT *outParams)
  {
      if (nativeType == GL_INT)
      {
          std::vector<GLint> intParams(numParams, 0);
          context->getIntegerv(pname, intParams.data());
  
          for (unsigned int i = 0; i < numParams; ++i)
          {
              outParams[i] = CastStateValue<QueryT>(pname, intParams[i]);
          }
      }
      else if (nativeType == GL_BOOL)
      {
          std::vector<GLboolean> boolParams(numParams, GL_FALSE);
          context->getBooleanv(pname, boolParams.data());
  
          for (unsigned int i = 0; i < numParams; ++i)
          {
              outParams[i] = (boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1));
          }
      }
      else if (nativeType == GL_FLOAT)
      {
          std::vector<GLfloat> floatParams(numParams, 0.0f);
          context->getFloatv(pname, floatParams.data());
  
          for (unsigned int i = 0; i < numParams; ++i)
          {
              outParams[i] = CastStateValue<QueryT>(pname, floatParams[i]);
          }
      }
      else if (nativeType == GL_INT_64_ANGLEX)
      {
          std::vector<GLint64> int64Params(numParams, 0);
          context->getInteger64v(pname, int64Params.data());
  
          for (unsigned int i = 0; i < numParams; ++i)
          {
              outParams[i] = CastStateValue<QueryT>(pname, int64Params[i]);
          }
      }
      else UNREACHABLE();
  }
  
  // Explicit template instantiation (how we export template functions in different files)
  // The calls below will make CastStateValues successfully link with the GL state query types
  // The GL state query API types are: bool, int, uint, float, int64
  
  template void CastStateValues<GLboolean>(Context *, GLenum, GLenum, unsigned int, GLboolean *);
  template void CastStateValues<GLint>(Context *, GLenum, GLenum, unsigned int, GLint *);
  template void CastStateValues<GLuint>(Context *, GLenum, GLenum, unsigned int, GLuint *);
  template void CastStateValues<GLfloat>(Context *, GLenum, GLenum, unsigned int, GLfloat *);
  template void CastStateValues<GLint64>(Context *, GLenum, GLenum, unsigned int, GLint64 *);
  
  template <typename QueryT>
  void CastIndexedStateValues(Context *context,
                              GLenum nativeType,
                              GLenum pname,
                              GLuint index,
                              unsigned int numParams,
                              QueryT *outParams)
  {
      if (nativeType == GL_INT)
      {
          std::vector<GLint> intParams(numParams, 0);
          context->getIntegeri_v(pname, index, intParams.data());
  
          for (unsigned int i = 0; i < numParams; ++i)
          {
              outParams[i] = CastStateValue<QueryT>(pname, intParams[i]);
          }
      }
      else if (nativeType == GL_BOOL)
      {
          std::vector<GLboolean> boolParams(numParams, GL_FALSE);
          context->getBooleani_v(pname, index, boolParams.data());
  
          for (unsigned int i = 0; i < numParams; ++i)
          {
              outParams[i] =
                  (boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1));
          }
      }
      else if (nativeType == GL_INT_64_ANGLEX)
      {
          std::vector<GLint64> int64Params(numParams, 0);
          context->getInteger64i_v(pname, index, int64Params.data());
  
          for (unsigned int i = 0; i < numParams; ++i)
          {
              outParams[i] = CastStateValue<QueryT>(pname, int64Params[i]);
          }
      }
      else
          UNREACHABLE();
  }
  
  template void CastIndexedStateValues<GLboolean>(Context *,
                                                  GLenum,
                                                  GLenum,
                                                  GLuint index,
                                                  unsigned int,
                                                  GLboolean *);
  template void CastIndexedStateValues<GLint>(Context *,
                                              GLenum,
                                              GLenum,
                                              GLuint index,
                                              unsigned int,
                                              GLint *);
  template void CastIndexedStateValues<GLuint>(Context *,
                                               GLenum,
                                               GLenum,
                                               GLuint index,
                                               unsigned int,
                                               GLuint *);
  template void CastIndexedStateValues<GLfloat>(Context *,
                                                GLenum,
                                                GLenum,
                                                GLuint index,
                                                unsigned int,
                                                GLfloat *);
  template void CastIndexedStateValues<GLint64>(Context *,
                                                GLenum,
                                                GLenum,
                                                GLuint index,
                                                unsigned int,
                                                GLint64 *);
  }
  

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