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

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• Author : Jamie Madill
  Date : 2017-04-20 15:46:24
  Hash : 876429b7
  Message : Update gl2.h and update entry points. Some method signatures were updated. Types like GLclampf and GLvoid were replaced with other equivalents. BUG=angleproject:1309 Change-Id: I05e8e2072c5a063d87ad96a855b907424661e680 Reviewed-on: https://chromium-review.googlesource.com/475011 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>

• src/libANGLE/queryutils.cpp

• //
  // Copyright (c) 2016 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.
  //
  
  // queryutils.cpp: Utilities for querying values from GL objects
  
  #include "libANGLE/queryutils.h"
  
  #include "common/utilities.h"
  
  #include "libANGLE/Buffer.h"
  #include "libANGLE/Config.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/Fence.h"
  #include "libANGLE/Framebuffer.h"
  #include "libANGLE/Program.h"
  #include "libANGLE/Renderbuffer.h"
  #include "libANGLE/Sampler.h"
  #include "libANGLE/Shader.h"
  #include "libANGLE/Texture.h"
  #include "libANGLE/Uniform.h"
  #include "libANGLE/VertexAttribute.h"
  
  namespace gl
  {
  
  namespace
  {
  template <typename ParamType>
  void QueryTexLevelParameterBase(const Texture *texture,
                                  GLenum target,
                                  GLint level,
                                  GLenum pname,
                                  ParamType *params)
  {
      ASSERT(texture != nullptr);
      const InternalFormat *info = texture->getTextureState().getImageDesc(target, level).format.info;
  
      switch (pname)
      {
          case GL_TEXTURE_RED_TYPE:
              *params = ConvertFromGLenum<ParamType>(info->redBits ? info->componentType : GL_NONE);
              break;
          case GL_TEXTURE_GREEN_TYPE:
              *params = ConvertFromGLenum<ParamType>(info->greenBits ? info->componentType : GL_NONE);
              break;
          case GL_TEXTURE_BLUE_TYPE:
              *params = ConvertFromGLenum<ParamType>(info->blueBits ? info->componentType : GL_NONE);
              break;
          case GL_TEXTURE_ALPHA_TYPE:
              *params = ConvertFromGLenum<ParamType>(info->alphaBits ? info->componentType : GL_NONE);
              break;
          case GL_TEXTURE_DEPTH_TYPE:
              *params = ConvertFromGLenum<ParamType>(info->depthBits ? info->componentType : GL_NONE);
              break;
          case GL_TEXTURE_RED_SIZE:
              *params = ConvertFromGLuint<ParamType>(info->redBits);
              break;
          case GL_TEXTURE_GREEN_SIZE:
              *params = ConvertFromGLuint<ParamType>(info->greenBits);
              break;
          case GL_TEXTURE_BLUE_SIZE:
              *params = ConvertFromGLuint<ParamType>(info->blueBits);
              break;
          case GL_TEXTURE_ALPHA_SIZE:
              *params = ConvertFromGLuint<ParamType>(info->alphaBits);
              break;
          case GL_TEXTURE_DEPTH_SIZE:
              *params = ConvertFromGLuint<ParamType>(info->depthBits);
              break;
          case GL_TEXTURE_STENCIL_SIZE:
              *params = ConvertFromGLuint<ParamType>(info->stencilBits);
              break;
          case GL_TEXTURE_SHARED_SIZE:
              *params = ConvertFromGLuint<ParamType>(info->sharedBits);
              break;
          case GL_TEXTURE_INTERNAL_FORMAT:
              *params =
                  ConvertFromGLenum<ParamType>(info->internalFormat ? info->internalFormat : GL_RGBA);
              break;
          case GL_TEXTURE_WIDTH:
              *params =
                  ConvertFromGLint<ParamType>(static_cast<GLint>(texture->getWidth(target, level)));
              break;
          case GL_TEXTURE_HEIGHT:
              *params =
                  ConvertFromGLint<ParamType>(static_cast<GLint>(texture->getHeight(target, level)));
              break;
          case GL_TEXTURE_DEPTH:
              *params =
                  ConvertFromGLint<ParamType>(static_cast<GLint>(texture->getDepth(target, level)));
              break;
          case GL_TEXTURE_SAMPLES:
              *params = ConvertFromGLint<ParamType>(texture->getSamples(target, level));
              break;
          case GL_TEXTURE_FIXED_SAMPLE_LOCATIONS:
              *params =
                  ConvertFromGLboolean<ParamType>(texture->getFixedSampleLocations(target, level));
              break;
          case GL_TEXTURE_COMPRESSED:
              *params = ConvertFromGLboolean<ParamType>(info->compressed);
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  template <typename ParamType>
  void QueryTexParameterBase(const Texture *texture, GLenum pname, ParamType *params)
  {
      ASSERT(texture != nullptr);
  
      switch (pname)
      {
          case GL_TEXTURE_MAG_FILTER:
              *params = ConvertFromGLenum<ParamType>(texture->getMagFilter());
              break;
          case GL_TEXTURE_MIN_FILTER:
              *params = ConvertFromGLenum<ParamType>(texture->getMinFilter());
              break;
          case GL_TEXTURE_WRAP_S:
              *params = ConvertFromGLenum<ParamType>(texture->getWrapS());
              break;
          case GL_TEXTURE_WRAP_T:
              *params = ConvertFromGLenum<ParamType>(texture->getWrapT());
              break;
          case GL_TEXTURE_WRAP_R:
              *params = ConvertFromGLenum<ParamType>(texture->getWrapR());
              break;
          case GL_TEXTURE_IMMUTABLE_FORMAT:
              *params = ConvertFromGLboolean<ParamType>(texture->getImmutableFormat());
              break;
          case GL_TEXTURE_IMMUTABLE_LEVELS:
              *params = ConvertFromGLuint<ParamType>(texture->getImmutableLevels());
              break;
          case GL_TEXTURE_USAGE_ANGLE:
              *params = ConvertFromGLenum<ParamType>(texture->getUsage());
              break;
          case GL_TEXTURE_MAX_ANISOTROPY_EXT:
              *params = ConvertFromGLfloat<ParamType>(texture->getMaxAnisotropy());
              break;
          case GL_TEXTURE_SWIZZLE_R:
              *params = ConvertFromGLenum<ParamType>(texture->getSwizzleRed());
              break;
          case GL_TEXTURE_SWIZZLE_G:
              *params = ConvertFromGLenum<ParamType>(texture->getSwizzleGreen());
              break;
          case GL_TEXTURE_SWIZZLE_B:
              *params = ConvertFromGLenum<ParamType>(texture->getSwizzleBlue());
              break;
          case GL_TEXTURE_SWIZZLE_A:
              *params = ConvertFromGLenum<ParamType>(texture->getSwizzleAlpha());
              break;
          case GL_TEXTURE_BASE_LEVEL:
              *params = ConvertFromGLuint<ParamType>(texture->getBaseLevel());
              break;
          case GL_TEXTURE_MAX_LEVEL:
              *params = ConvertFromGLuint<ParamType>(texture->getMaxLevel());
              break;
          case GL_TEXTURE_MIN_LOD:
              *params = ConvertFromGLfloat<ParamType>(texture->getSamplerState().minLod);
              break;
          case GL_TEXTURE_MAX_LOD:
              *params = ConvertFromGLfloat<ParamType>(texture->getSamplerState().maxLod);
              break;
          case GL_TEXTURE_COMPARE_MODE:
              *params = ConvertFromGLenum<ParamType>(texture->getCompareMode());
              break;
          case GL_TEXTURE_COMPARE_FUNC:
              *params = ConvertFromGLenum<ParamType>(texture->getCompareFunc());
              break;
          case GL_TEXTURE_SRGB_DECODE_EXT:
              *params = ConvertFromGLenum<ParamType>(texture->getSRGBDecode());
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  template <typename ParamType>
  void SetTexParameterBase(Texture *texture, GLenum pname, const ParamType *params)
  {
      ASSERT(texture != nullptr);
  
      switch (pname)
      {
          case GL_TEXTURE_WRAP_S:
              texture->setWrapS(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_WRAP_T:
              texture->setWrapT(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_WRAP_R:
              texture->setWrapR(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_MIN_FILTER:
              texture->setMinFilter(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_MAG_FILTER:
              texture->setMagFilter(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_USAGE_ANGLE:
              texture->setUsage(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_MAX_ANISOTROPY_EXT:
              texture->setMaxAnisotropy(ConvertToGLfloat(params[0]));
              break;
          case GL_TEXTURE_COMPARE_MODE:
              texture->setCompareMode(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_COMPARE_FUNC:
              texture->setCompareFunc(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_SWIZZLE_R:
              texture->setSwizzleRed(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_SWIZZLE_G:
              texture->setSwizzleGreen(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_SWIZZLE_B:
              texture->setSwizzleBlue(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_SWIZZLE_A:
              texture->setSwizzleAlpha(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_BASE_LEVEL:
              texture->setBaseLevel(ConvertToGLuint(params[0]));
              break;
          case GL_TEXTURE_MAX_LEVEL:
              texture->setMaxLevel(ConvertToGLuint(params[0]));
              break;
          case GL_TEXTURE_MIN_LOD:
              texture->setMinLod(ConvertToGLfloat(params[0]));
              break;
          case GL_TEXTURE_MAX_LOD:
              texture->setMaxLod(ConvertToGLfloat(params[0]));
              break;
          case GL_DEPTH_STENCIL_TEXTURE_MODE:
              texture->setDepthStencilTextureMode(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_SRGB_DECODE_EXT:
              texture->setSRGBDecode(ConvertToGLenum(params[0]));
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  template <typename ParamType>
  void QuerySamplerParameterBase(const Sampler *sampler, GLenum pname, ParamType *params)
  {
      switch (pname)
      {
          case GL_TEXTURE_MIN_FILTER:
              *params = ConvertFromGLenum<ParamType>(sampler->getMinFilter());
              break;
          case GL_TEXTURE_MAG_FILTER:
              *params = ConvertFromGLenum<ParamType>(sampler->getMagFilter());
              break;
          case GL_TEXTURE_WRAP_S:
              *params = ConvertFromGLenum<ParamType>(sampler->getWrapS());
              break;
          case GL_TEXTURE_WRAP_T:
              *params = ConvertFromGLenum<ParamType>(sampler->getWrapT());
              break;
          case GL_TEXTURE_WRAP_R:
              *params = ConvertFromGLenum<ParamType>(sampler->getWrapR());
              break;
          case GL_TEXTURE_MAX_ANISOTROPY_EXT:
              *params = ConvertFromGLfloat<ParamType>(sampler->getMaxAnisotropy());
              break;
          case GL_TEXTURE_MIN_LOD:
              *params = ConvertFromGLfloat<ParamType>(sampler->getMinLod());
              break;
          case GL_TEXTURE_MAX_LOD:
              *params = ConvertFromGLfloat<ParamType>(sampler->getMaxLod());
              break;
          case GL_TEXTURE_COMPARE_MODE:
              *params = ConvertFromGLenum<ParamType>(sampler->getCompareMode());
              break;
          case GL_TEXTURE_COMPARE_FUNC:
              *params = ConvertFromGLenum<ParamType>(sampler->getCompareFunc());
              break;
          case GL_TEXTURE_SRGB_DECODE_EXT:
              *params = ConvertFromGLenum<ParamType>(sampler->getSRGBDecode());
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  template <typename ParamType>
  void SetSamplerParameterBase(Sampler *sampler, GLenum pname, const ParamType *params)
  {
      switch (pname)
      {
          case GL_TEXTURE_WRAP_S:
              sampler->setWrapS(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_WRAP_T:
              sampler->setWrapT(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_WRAP_R:
              sampler->setWrapR(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_MIN_FILTER:
              sampler->setMinFilter(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_MAG_FILTER:
              sampler->setMagFilter(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_MAX_ANISOTROPY_EXT:
              sampler->setMaxAnisotropy(ConvertToGLfloat(params[0]));
              break;
          case GL_TEXTURE_COMPARE_MODE:
              sampler->setCompareMode(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_COMPARE_FUNC:
              sampler->setCompareFunc(ConvertToGLenum(params[0]));
              break;
          case GL_TEXTURE_MIN_LOD:
              sampler->setMinLod(ConvertToGLfloat(params[0]));
              break;
          case GL_TEXTURE_MAX_LOD:
              sampler->setMaxLod(ConvertToGLfloat(params[0]));
              break;
          case GL_TEXTURE_SRGB_DECODE_EXT:
              sampler->setSRGBDecode(ConvertToGLenum(params[0]));
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  template <typename ParamType, typename CurrentDataType>
  ParamType ConvertCurrentValue(CurrentDataType currentValue)
  {
      return static_cast<ParamType>(currentValue);
  }
  
  template <>
  GLint ConvertCurrentValue(GLfloat currentValue)
  {
      return iround<GLint>(currentValue);
  }
  
  // Warning: you should ensure binding really matches attrib.bindingIndex before using this function.
  template <typename ParamType, typename CurrentDataType, size_t CurrentValueCount>
  void QueryVertexAttribBase(const VertexAttribute &attrib,
                             const VertexBinding &binding,
                             const CurrentDataType (&currentValueData)[CurrentValueCount],
                             GLenum pname,
                             ParamType *params)
  {
      switch (pname)
      {
          case GL_CURRENT_VERTEX_ATTRIB:
              for (size_t i = 0; i < CurrentValueCount; ++i)
              {
                  params[i] = ConvertCurrentValue<ParamType>(currentValueData[i]);
              }
              break;
          case GL_VERTEX_ATTRIB_ARRAY_ENABLED:
              *params = ConvertFromGLboolean<ParamType>(attrib.enabled);
              break;
          case GL_VERTEX_ATTRIB_ARRAY_SIZE:
              *params = ConvertFromGLuint<ParamType>(attrib.size);
              break;
          case GL_VERTEX_ATTRIB_ARRAY_STRIDE:
              *params = ConvertFromGLuint<ParamType>(attrib.vertexAttribArrayStride);
              break;
          case GL_VERTEX_ATTRIB_ARRAY_TYPE:
              *params = ConvertFromGLenum<ParamType>(attrib.type);
              break;
          case GL_VERTEX_ATTRIB_ARRAY_NORMALIZED:
              *params = ConvertFromGLboolean<ParamType>(attrib.normalized);
              break;
          case GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING:
              *params = ConvertFromGLuint<ParamType>(binding.buffer.id());
              break;
          case GL_VERTEX_ATTRIB_ARRAY_DIVISOR:
              *params = ConvertFromGLuint<ParamType>(binding.divisor);
              break;
          case GL_VERTEX_ATTRIB_ARRAY_INTEGER:
              *params = ConvertFromGLboolean<ParamType>(attrib.pureInteger);
              break;
          case GL_VERTEX_ATTRIB_BINDING:
              *params = ConvertFromGLuint<ParamType>(attrib.bindingIndex);
              break;
          case GL_VERTEX_ATTRIB_RELATIVE_OFFSET:
              // attrib.relativeOffset should not be negative or greater than max GLint
              ASSERT(attrib.relativeOffset >= 0 &&
                     attrib.relativeOffset <= std::numeric_limits<GLint>::max());
              *params = ConvertFromGLint<ParamType>(static_cast<GLint>(attrib.relativeOffset));
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  template <typename ParamType>
  void QueryBufferParameterBase(const Buffer *buffer, GLenum pname, ParamType *params)
  {
      ASSERT(buffer != nullptr);
  
      switch (pname)
      {
          case GL_BUFFER_USAGE:
              *params = ConvertFromGLenum<ParamType>(buffer->getUsage());
              break;
          case GL_BUFFER_SIZE:
              *params = ConvertFromGLint64<ParamType>(buffer->getSize());
              break;
          case GL_BUFFER_ACCESS_FLAGS:
              *params = ConvertFromGLuint<ParamType>(buffer->getAccessFlags());
              break;
          case GL_BUFFER_ACCESS_OES:
              *params = ConvertFromGLenum<ParamType>(buffer->getAccess());
              break;
          case GL_BUFFER_MAPPED:
              *params = ConvertFromGLboolean<ParamType>(buffer->isMapped());
              break;
          case GL_BUFFER_MAP_OFFSET:
              *params = ConvertFromGLint64<ParamType>(buffer->getMapOffset());
              break;
          case GL_BUFFER_MAP_LENGTH:
              *params = ConvertFromGLint64<ParamType>(buffer->getMapLength());
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  }  // anonymous namespace
  
  void QueryFramebufferAttachmentParameteriv(const Framebuffer *framebuffer,
                                             GLenum attachment,
                                             GLenum pname,
                                             GLint *params)
  {
      ASSERT(framebuffer);
  
      const FramebufferAttachment *attachmentObject = framebuffer->getAttachment(attachment);
      if (attachmentObject == nullptr)
      {
          // ES 2.0.25 spec pg 127 states that if the value of FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE
          // is NONE, then querying any other pname will generate INVALID_ENUM.
  
          // ES 3.0.2 spec pg 235 states that if the attachment type is none,
          // GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME will return zero and be an
          // INVALID_OPERATION for all other pnames
  
          switch (pname)
          {
              case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE:
                  *params = GL_NONE;
                  break;
  
              case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME:
                  *params = 0;
                  break;
  
              default:
                  UNREACHABLE();
                  break;
          }
  
          return;
      }
  
      switch (pname)
      {
          case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE:
              *params = attachmentObject->type();
              break;
  
          case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME:
              *params = attachmentObject->id();
              break;
  
          case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL:
              *params = attachmentObject->mipLevel();
              break;
  
          case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE:
              *params = attachmentObject->cubeMapFace();
              break;
  
          case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
              *params = attachmentObject->getRedSize();
              break;
  
          case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
              *params = attachmentObject->getGreenSize();
              break;
  
          case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
              *params = attachmentObject->getBlueSize();
              break;
  
          case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
              *params = attachmentObject->getAlphaSize();
              break;
  
          case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
              *params = attachmentObject->getDepthSize();
              break;
  
          case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
              *params = attachmentObject->getStencilSize();
              break;
  
          case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:
              *params = attachmentObject->getComponentType();
              break;
  
          case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING:
              *params = attachmentObject->getColorEncoding();
              break;
  
          case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER:
              *params = attachmentObject->layer();
              break;
  
          default:
              UNREACHABLE();
              break;
      }
  }
  
  void QueryBufferParameteriv(const Buffer *buffer, GLenum pname, GLint *params)
  {
      QueryBufferParameterBase(buffer, pname, params);
  }
  
  void QueryBufferParameteri64v(const Buffer *buffer, GLenum pname, GLint64 *params)
  {
      QueryBufferParameterBase(buffer, pname, params);
  }
  
  void QueryBufferPointerv(const Buffer *buffer, GLenum pname, void **params)
  {
      switch (pname)
      {
          case GL_BUFFER_MAP_POINTER:
              *params = buffer->getMapPointer();
              break;
  
          default:
              UNREACHABLE();
              break;
      }
  }
  
  void QueryProgramiv(const Program *program, GLenum pname, GLint *params)
  {
      ASSERT(program != nullptr);
  
      switch (pname)
      {
          case GL_DELETE_STATUS:
              *params = program->isFlaggedForDeletion();
              return;
          case GL_LINK_STATUS:
              *params = program->isLinked();
              return;
          case GL_VALIDATE_STATUS:
              *params = program->isValidated();
              return;
          case GL_INFO_LOG_LENGTH:
              *params = program->getInfoLogLength();
              return;
          case GL_ATTACHED_SHADERS:
              *params = program->getAttachedShadersCount();
              return;
          case GL_ACTIVE_ATTRIBUTES:
              *params = program->getActiveAttributeCount();
              return;
          case GL_ACTIVE_ATTRIBUTE_MAX_LENGTH:
              *params = program->getActiveAttributeMaxLength();
              return;
          case GL_ACTIVE_UNIFORMS:
              *params = program->getActiveUniformCount();
              return;
          case GL_ACTIVE_UNIFORM_MAX_LENGTH:
              *params = program->getActiveUniformMaxLength();
              return;
          case GL_PROGRAM_BINARY_LENGTH_OES:
              *params = program->getBinaryLength();
              return;
          case GL_ACTIVE_UNIFORM_BLOCKS:
              *params = program->getActiveUniformBlockCount();
              return;
          case GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH:
              *params = program->getActiveUniformBlockMaxLength();
              break;
          case GL_TRANSFORM_FEEDBACK_BUFFER_MODE:
              *params = program->getTransformFeedbackBufferMode();
              break;
          case GL_TRANSFORM_FEEDBACK_VARYINGS:
              *params = program->getTransformFeedbackVaryingCount();
              break;
          case GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH:
              *params = program->getTransformFeedbackVaryingMaxLength();
              break;
          case GL_PROGRAM_BINARY_RETRIEVABLE_HINT:
              *params = program->getBinaryRetrievableHint();
              break;
          case GL_PROGRAM_SEPARABLE:
              *params = program->isSeparable();
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  void QueryRenderbufferiv(const Context *context,
                           const Renderbuffer *renderbuffer,
                           GLenum pname,
                           GLint *params)
  {
      ASSERT(renderbuffer != nullptr);
  
      switch (pname)
      {
          case GL_RENDERBUFFER_WIDTH:
              *params = renderbuffer->getWidth();
              break;
          case GL_RENDERBUFFER_HEIGHT:
              *params = renderbuffer->getHeight();
              break;
          case GL_RENDERBUFFER_INTERNAL_FORMAT:
              // Special case the WebGL 1 DEPTH_STENCIL format.
              if (context->isWebGL1() &&
                  renderbuffer->getFormat().info->internalFormat == GL_DEPTH24_STENCIL8)
              {
                  *params = GL_DEPTH_STENCIL;
              }
              else
              {
                  *params = renderbuffer->getFormat().info->internalFormat;
              }
              break;
          case GL_RENDERBUFFER_RED_SIZE:
              *params = renderbuffer->getRedSize();
              break;
          case GL_RENDERBUFFER_GREEN_SIZE:
              *params = renderbuffer->getGreenSize();
              break;
          case GL_RENDERBUFFER_BLUE_SIZE:
              *params = renderbuffer->getBlueSize();
              break;
          case GL_RENDERBUFFER_ALPHA_SIZE:
              *params = renderbuffer->getAlphaSize();
              break;
          case GL_RENDERBUFFER_DEPTH_SIZE:
              *params = renderbuffer->getDepthSize();
              break;
          case GL_RENDERBUFFER_STENCIL_SIZE:
              *params = renderbuffer->getStencilSize();
              break;
          case GL_RENDERBUFFER_SAMPLES_ANGLE:
              *params = renderbuffer->getSamples();
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  void QueryShaderiv(const Shader *shader, GLenum pname, GLint *params)
  {
      ASSERT(shader != nullptr);
  
      switch (pname)
      {
          case GL_SHADER_TYPE:
              *params = shader->getType();
              return;
          case GL_DELETE_STATUS:
              *params = shader->isFlaggedForDeletion();
              return;
          case GL_COMPILE_STATUS:
              *params = shader->isCompiled() ? GL_TRUE : GL_FALSE;
              return;
          case GL_INFO_LOG_LENGTH:
              *params = shader->getInfoLogLength();
              return;
          case GL_SHADER_SOURCE_LENGTH:
              *params = shader->getSourceLength();
              return;
          case GL_TRANSLATED_SHADER_SOURCE_LENGTH_ANGLE:
              *params = shader->getTranslatedSourceWithDebugInfoLength();
              return;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  void QueryTexLevelParameterfv(const Texture *texture,
                                GLenum target,
                                GLint level,
                                GLenum pname,
                                GLfloat *params)
  {
      QueryTexLevelParameterBase(texture, target, level, pname, params);
  }
  
  void QueryTexLevelParameteriv(const Texture *texture,
                                GLenum target,
                                GLint level,
                                GLenum pname,
                                GLint *params)
  {
      QueryTexLevelParameterBase(texture, target, level, pname, params);
  }
  
  void QueryTexParameterfv(const Texture *texture, GLenum pname, GLfloat *params)
  {
      QueryTexParameterBase(texture, pname, params);
  }
  
  void QueryTexParameteriv(const Texture *texture, GLenum pname, GLint *params)
  {
      QueryTexParameterBase(texture, pname, params);
  }
  
  void QuerySamplerParameterfv(const Sampler *sampler, GLenum pname, GLfloat *params)
  {
      QuerySamplerParameterBase(sampler, pname, params);
  }
  
  void QuerySamplerParameteriv(const Sampler *sampler, GLenum pname, GLint *params)
  {
      QuerySamplerParameterBase(sampler, pname, params);
  }
  
  void QueryVertexAttribfv(const VertexAttribute &attrib,
                           const VertexBinding &binding,
                           const VertexAttribCurrentValueData &currentValueData,
                           GLenum pname,
                           GLfloat *params)
  {
      QueryVertexAttribBase(attrib, binding, currentValueData.FloatValues, pname, params);
  }
  
  void QueryVertexAttribiv(const VertexAttribute &attrib,
                           const VertexBinding &binding,
                           const VertexAttribCurrentValueData &currentValueData,
                           GLenum pname,
                           GLint *params)
  {
      QueryVertexAttribBase(attrib, binding, currentValueData.FloatValues, pname, params);
  }
  
  void QueryVertexAttribPointerv(const VertexAttribute &attrib, GLenum pname, void **pointer)
  {
      switch (pname)
      {
          case GL_VERTEX_ATTRIB_ARRAY_POINTER:
              *pointer = const_cast<void *>(attrib.pointer);
              break;
  
          default:
              UNREACHABLE();
              break;
      }
  }
  
  void QueryVertexAttribIiv(const VertexAttribute &attrib,
                            const VertexBinding &binding,
                            const VertexAttribCurrentValueData &currentValueData,
                            GLenum pname,
                            GLint *params)
  {
      QueryVertexAttribBase(attrib, binding, currentValueData.IntValues, pname, params);
  }
  
  void QueryVertexAttribIuiv(const VertexAttribute &attrib,
                             const VertexBinding &binding,
                             const VertexAttribCurrentValueData &currentValueData,
                             GLenum pname,
                             GLuint *params)
  {
      QueryVertexAttribBase(attrib, binding, currentValueData.UnsignedIntValues, pname, params);
  }
  
  void QueryActiveUniformBlockiv(const Program *program,
                                 GLuint uniformBlockIndex,
                                 GLenum pname,
                                 GLint *params)
  {
      const UniformBlock &uniformBlock = program->getUniformBlockByIndex(uniformBlockIndex);
      switch (pname)
      {
          case GL_UNIFORM_BLOCK_BINDING:
              *params = ConvertToGLint(program->getUniformBlockBinding(uniformBlockIndex));
              break;
          case GL_UNIFORM_BLOCK_DATA_SIZE:
              *params = ConvertToGLint(uniformBlock.dataSize);
              break;
          case GL_UNIFORM_BLOCK_NAME_LENGTH:
              *params = ConvertToGLint(uniformBlock.nameWithArrayIndex().size() + 1);
              break;
          case GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS:
              *params = ConvertToGLint(uniformBlock.memberUniformIndexes.size());
              break;
          case GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES:
              for (size_t blockMemberIndex = 0;
                   blockMemberIndex < uniformBlock.memberUniformIndexes.size(); blockMemberIndex++)
              {
                  params[blockMemberIndex] =
                      ConvertToGLint(uniformBlock.memberUniformIndexes[blockMemberIndex]);
              }
              break;
          case GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER:
              *params = ConvertToGLint(uniformBlock.vertexStaticUse);
              break;
          case GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER:
              *params = ConvertToGLint(uniformBlock.fragmentStaticUse);
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  void QueryInternalFormativ(const TextureCaps &format, GLenum pname, GLsizei bufSize, GLint *params)
  {
      switch (pname)
      {
          case GL_NUM_SAMPLE_COUNTS:
              if (bufSize != 0)
              {
                  *params = static_cast<GLint>(format.sampleCounts.size());
              }
              break;
  
          case GL_SAMPLES:
          {
              size_t returnCount   = std::min<size_t>(bufSize, format.sampleCounts.size());
              auto sampleReverseIt = format.sampleCounts.rbegin();
              for (size_t sampleIndex = 0; sampleIndex < returnCount; ++sampleIndex)
              {
                  params[sampleIndex] = *sampleReverseIt++;
              }
          }
          break;
  
          default:
              UNREACHABLE();
              break;
      }
  }
  
  void QueryFramebufferParameteriv(const Framebuffer *framebuffer, GLenum pname, GLint *params)
  {
      ASSERT(framebuffer);
  
      switch (pname)
      {
          case GL_FRAMEBUFFER_DEFAULT_WIDTH:
              *params = framebuffer->getDefaultWidth();
              break;
          case GL_FRAMEBUFFER_DEFAULT_HEIGHT:
              *params = framebuffer->getDefaultHeight();
              break;
          case GL_FRAMEBUFFER_DEFAULT_SAMPLES:
              *params = framebuffer->getDefaultSamples();
              break;
          case GL_FRAMEBUFFER_DEFAULT_FIXED_SAMPLE_LOCATIONS:
              *params = framebuffer->getDefaultFixedSampleLocations();
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  Error QuerySynciv(const FenceSync *sync,
                    GLenum pname,
                    GLsizei bufSize,
                    GLsizei *length,
                    GLint *values)
  {
      ASSERT(sync);
  
      // All queries return one value, exit early if the buffer can't fit anything.
      if (bufSize < 1)
      {
          if (length != nullptr)
          {
              *length = 0;
          }
          return NoError();
      }
  
      switch (pname)
      {
          case GL_OBJECT_TYPE:
              *values = ConvertToGLint(GL_SYNC_FENCE);
              break;
          case GL_SYNC_CONDITION:
              *values = ConvertToGLint(sync->getCondition());
              break;
          case GL_SYNC_FLAGS:
              *values = ConvertToGLint(sync->getFlags());
              break;
          case GL_SYNC_STATUS:
              ANGLE_TRY(sync->getStatus(values));
              break;
  
          default:
              UNREACHABLE();
              break;
      }
  
      if (length != nullptr)
      {
          *length = 1;
      }
  
      return NoError();
  }
  
  void SetTexParameterf(Texture *texture, GLenum pname, GLfloat param)
  {
      SetTexParameterBase(texture, pname, &param);
  }
  
  void SetTexParameterfv(Texture *texture, GLenum pname, const GLfloat *params)
  {
      SetTexParameterBase(texture, pname, params);
  }
  
  void SetTexParameteri(Texture *texture, GLenum pname, GLint param)
  {
      SetTexParameterBase(texture, pname, &param);
  }
  
  void SetTexParameteriv(Texture *texture, GLenum pname, const GLint *params)
  {
      SetTexParameterBase(texture, pname, params);
  }
  
  void SetSamplerParameterf(Sampler *sampler, GLenum pname, GLfloat param)
  {
      SetSamplerParameterBase(sampler, pname, &param);
  }
  
  void SetSamplerParameterfv(Sampler *sampler, GLenum pname, const GLfloat *params)
  {
      SetSamplerParameterBase(sampler, pname, params);
  }
  
  void SetSamplerParameteri(Sampler *sampler, GLenum pname, GLint param)
  {
      SetSamplerParameterBase(sampler, pname, &param);
  }
  
  void SetSamplerParameteriv(Sampler *sampler, GLenum pname, const GLint *params)
  {
      SetSamplerParameterBase(sampler, pname, params);
  }
  
  void SetFramebufferParameteri(Framebuffer *framebuffer, GLenum pname, GLint param)
  {
      ASSERT(framebuffer);
  
      switch (pname)
      {
          case GL_FRAMEBUFFER_DEFAULT_WIDTH:
              framebuffer->setDefaultWidth(param);
              break;
          case GL_FRAMEBUFFER_DEFAULT_HEIGHT:
              framebuffer->setDefaultHeight(param);
              break;
          case GL_FRAMEBUFFER_DEFAULT_SAMPLES:
              framebuffer->setDefaultSamples(param);
              break;
          case GL_FRAMEBUFFER_DEFAULT_FIXED_SAMPLE_LOCATIONS:
              framebuffer->setDefaultFixedSampleLocations(static_cast<GLboolean>(param));
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  void SetProgramParameteri(Program *program, GLenum pname, GLint value)
  {
      ASSERT(program);
  
      switch (pname)
      {
          case GL_PROGRAM_BINARY_RETRIEVABLE_HINT:
              program->setBinaryRetrievableHint(value != GL_FALSE);
              break;
          case GL_PROGRAM_SEPARABLE:
              program->setSeparable(value != GL_FALSE);
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  GLuint QueryProgramResourceIndex(const Program *program,
                                   GLenum programInterface,
                                   const GLchar *name)
  {
      switch (programInterface)
      {
          case GL_PROGRAM_INPUT:
              return program->getInputResourceIndex(name);
  
          case GL_PROGRAM_OUTPUT:
              return program->getOutputResourceIndex(name);
  
          // TODO(Jie): more interfaces.
          case GL_UNIFORM:
          case GL_UNIFORM_BLOCK:
          case GL_TRANSFORM_FEEDBACK_VARYING:
          case GL_BUFFER_VARIABLE:
          case GL_SHADER_STORAGE_BLOCK:
              UNIMPLEMENTED();
              return GL_INVALID_INDEX;
  
          default:
              UNREACHABLE();
              return GL_INVALID_INDEX;
      }
  }
  
  void QueryProgramResourceName(const Program *program,
                                GLenum programInterface,
                                GLuint index,
                                GLsizei bufSize,
                                GLsizei *length,
                                GLchar *name)
  {
      switch (programInterface)
      {
          case GL_PROGRAM_INPUT:
              program->getInputResourceName(index, bufSize, length, name);
              break;
  
          case GL_PROGRAM_OUTPUT:
              program->getOutputResourceName(index, bufSize, length, name);
              break;
  
          // TODO(Jie): more interfaces.
          case GL_UNIFORM:
          case GL_UNIFORM_BLOCK:
          case GL_TRANSFORM_FEEDBACK_VARYING:
          case GL_BUFFER_VARIABLE:
          case GL_SHADER_STORAGE_BLOCK:
              UNIMPLEMENTED();
              break;
  
          default:
              UNREACHABLE();
      }
  }
  
  }  // namespace gl
  
  namespace egl
  {
  
  void QueryConfigAttrib(const Config *config, EGLint attribute, EGLint *value)
  {
      ASSERT(config != nullptr);
      switch (attribute)
      {
          case EGL_BUFFER_SIZE:
              *value = config->bufferSize;
              break;
          case EGL_ALPHA_SIZE:
              *value = config->alphaSize;
              break;
          case EGL_BLUE_SIZE:
              *value = config->blueSize;
              break;
          case EGL_GREEN_SIZE:
              *value = config->greenSize;
              break;
          case EGL_RED_SIZE:
              *value = config->redSize;
              break;
          case EGL_DEPTH_SIZE:
              *value = config->depthSize;
              break;
          case EGL_STENCIL_SIZE:
              *value = config->stencilSize;
              break;
          case EGL_CONFIG_CAVEAT:
              *value = config->configCaveat;
              break;
          case EGL_CONFIG_ID:
              *value = config->configID;
              break;
          case EGL_LEVEL:
              *value = config->level;
              break;
          case EGL_NATIVE_RENDERABLE:
              *value = config->nativeRenderable;
              break;
          case EGL_NATIVE_VISUAL_ID:
              *value = config->nativeVisualID;
              break;
          case EGL_NATIVE_VISUAL_TYPE:
              *value = config->nativeVisualType;
              break;
          case EGL_SAMPLES:
              *value = config->samples;
              break;
          case EGL_SAMPLE_BUFFERS:
              *value = config->sampleBuffers;
              break;
          case EGL_SURFACE_TYPE:
              *value = config->surfaceType;
              break;
          case EGL_TRANSPARENT_TYPE:
              *value = config->transparentType;
              break;
          case EGL_TRANSPARENT_BLUE_VALUE:
              *value = config->transparentBlueValue;
              break;
          case EGL_TRANSPARENT_GREEN_VALUE:
              *value = config->transparentGreenValue;
              break;
          case EGL_TRANSPARENT_RED_VALUE:
              *value = config->transparentRedValue;
              break;
          case EGL_BIND_TO_TEXTURE_RGB:
              *value = config->bindToTextureRGB;
              break;
          case EGL_BIND_TO_TEXTURE_RGBA:
              *value = config->bindToTextureRGBA;
              break;
          case EGL_MIN_SWAP_INTERVAL:
              *value = config->minSwapInterval;
              break;
          case EGL_MAX_SWAP_INTERVAL:
              *value = config->maxSwapInterval;
              break;
          case EGL_LUMINANCE_SIZE:
              *value = config->luminanceSize;
              break;
          case EGL_ALPHA_MASK_SIZE:
              *value = config->alphaMaskSize;
              break;
          case EGL_COLOR_BUFFER_TYPE:
              *value = config->colorBufferType;
              break;
          case EGL_RENDERABLE_TYPE:
              *value = config->renderableType;
              break;
          case EGL_MATCH_NATIVE_PIXMAP:
              *value = false;
              UNIMPLEMENTED();
              break;
          case EGL_CONFORMANT:
              *value = config->conformant;
              break;
          case EGL_MAX_PBUFFER_WIDTH:
              *value = config->maxPBufferWidth;
              break;
          case EGL_MAX_PBUFFER_HEIGHT:
              *value = config->maxPBufferHeight;
              break;
          case EGL_MAX_PBUFFER_PIXELS:
              *value = config->maxPBufferPixels;
              break;
          case EGL_OPTIMAL_SURFACE_ORIENTATION_ANGLE:
              *value = config->optimalOrientation;
              break;
          case EGL_COLOR_COMPONENT_TYPE_EXT:
              *value = config->colorComponentType;
              break;
          default:
              UNREACHABLE();
              break;
      }
  }
  
  }  // namespace egl