queryutils.cpp

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Author : Corentin Wallez
Date : 2018-02-27 15:17:10
Hash : 99d492c2
Message : Use packed enums for the texture types and targets, part 2 This completes the refactor by using the packed enums in the gl:: layer and in the backends. The packed enum code generation is modified to support explicitly assigning values to the packed enums so that the TextureTarget cube map faces are in the correct order and easy to iterate over. BUG=angleproject:2169 Change-Id: I5903235e684ccf382e92a8a1e10c5c85b4b16a04 Reviewed-on: https://chromium-review.googlesource.com/939994 Commit-Queue: Corentin Wallez <cwallez@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/Surface.h"
#include "libANGLE/Texture.h"
#include "libANGLE/Uniform.h"
#include "libANGLE/VertexAttribute.h"
#include "libANGLE/queryconversions.h"

namespace gl
{

namespace
{

template <typename ParamType>
void QueryTexLevelParameterBase(const Texture *texture,
                                TextureTarget 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 = CastFromGLintStateValue<ParamType>(
                pname, info->redBits ? info->componentType : GL_NONE);
            break;
        case GL_TEXTURE_GREEN_TYPE:
            *params = CastFromGLintStateValue<ParamType>(
                pname, info->greenBits ? info->componentType : GL_NONE);
            break;
        case GL_TEXTURE_BLUE_TYPE:
            *params = CastFromGLintStateValue<ParamType>(
                pname, info->blueBits ? info->componentType : GL_NONE);
            break;
        case GL_TEXTURE_ALPHA_TYPE:
            *params = CastFromGLintStateValue<ParamType>(
                pname, info->alphaBits ? info->componentType : GL_NONE);
            break;
        case GL_TEXTURE_DEPTH_TYPE:
            *params = CastFromGLintStateValue<ParamType>(
                pname, info->depthBits ? info->componentType : GL_NONE);
            break;
        case GL_TEXTURE_RED_SIZE:
            *params = CastFromGLintStateValue<ParamType>(pname, info->redBits);
            break;
        case GL_TEXTURE_GREEN_SIZE:
            *params = CastFromGLintStateValue<ParamType>(pname, info->greenBits);
            break;
        case GL_TEXTURE_BLUE_SIZE:
            *params = CastFromGLintStateValue<ParamType>(pname, info->blueBits);
            break;
        case GL_TEXTURE_ALPHA_SIZE:
            *params = CastFromGLintStateValue<ParamType>(pname, info->alphaBits);
            break;
        case GL_TEXTURE_DEPTH_SIZE:
            *params = CastFromGLintStateValue<ParamType>(pname, info->depthBits);
            break;
        case GL_TEXTURE_STENCIL_SIZE:
            *params = CastFromGLintStateValue<ParamType>(pname, info->stencilBits);
            break;
        case GL_TEXTURE_SHARED_SIZE:
            *params = CastFromGLintStateValue<ParamType>(pname, info->sharedBits);
            break;
        case GL_TEXTURE_INTERNAL_FORMAT:
            *params = CastFromGLintStateValue<ParamType>(
                pname, info->internalFormat ? info->internalFormat : GL_RGBA);
            break;
        case GL_TEXTURE_WIDTH:
            *params = CastFromGLintStateValue<ParamType>(
                pname, static_cast<uint32_t>(texture->getWidth(target, level)));
            break;
        case GL_TEXTURE_HEIGHT:
            *params = CastFromGLintStateValue<ParamType>(
                pname, static_cast<uint32_t>(texture->getHeight(target, level)));
            break;
        case GL_TEXTURE_DEPTH:
            *params = CastFromGLintStateValue<ParamType>(
                pname, static_cast<uint32_t>(texture->getDepth(target, level)));
            break;
        case GL_TEXTURE_SAMPLES:
            *params = CastFromStateValue<ParamType>(pname, texture->getSamples(target, level));
            break;
        case GL_TEXTURE_FIXED_SAMPLE_LOCATIONS:
            *params = CastFromStateValue<ParamType>(
                pname, static_cast<GLint>(texture->getFixedSampleLocations(target, level)));
            break;
        case GL_TEXTURE_COMPRESSED:
            *params = CastFromStateValue<ParamType>(pname, static_cast<GLint>(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 = CastFromGLintStateValue<ParamType>(pname, texture->getMagFilter());
            break;
        case GL_TEXTURE_MIN_FILTER:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getMinFilter());
            break;
        case GL_TEXTURE_WRAP_S:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getWrapS());
            break;
        case GL_TEXTURE_WRAP_T:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getWrapT());
            break;
        case GL_TEXTURE_WRAP_R:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getWrapR());
            break;
        case GL_TEXTURE_IMMUTABLE_FORMAT:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getImmutableFormat());
            break;
        case GL_TEXTURE_IMMUTABLE_LEVELS:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getImmutableLevels());
            break;
        case GL_TEXTURE_USAGE_ANGLE:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getUsage());
            break;
        case GL_TEXTURE_MAX_ANISOTROPY_EXT:
            *params = CastFromStateValue<ParamType>(pname, texture->getMaxAnisotropy());
            break;
        case GL_TEXTURE_SWIZZLE_R:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getSwizzleRed());
            break;
        case GL_TEXTURE_SWIZZLE_G:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getSwizzleGreen());
            break;
        case GL_TEXTURE_SWIZZLE_B:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getSwizzleBlue());
            break;
        case GL_TEXTURE_SWIZZLE_A:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getSwizzleAlpha());
            break;
        case GL_TEXTURE_BASE_LEVEL:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getBaseLevel());
            break;
        case GL_TEXTURE_MAX_LEVEL:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getMaxLevel());
            break;
        case GL_TEXTURE_MIN_LOD:
            *params = CastFromStateValue<ParamType>(pname, texture->getSamplerState().minLod);
            break;
        case GL_TEXTURE_MAX_LOD:
            *params = CastFromStateValue<ParamType>(pname, texture->getSamplerState().maxLod);
            break;
        case GL_TEXTURE_COMPARE_MODE:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getCompareMode());
            break;
        case GL_TEXTURE_COMPARE_FUNC:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getCompareFunc());
            break;
        case GL_TEXTURE_SRGB_DECODE_EXT:
            *params = CastFromGLintStateValue<ParamType>(pname, texture->getSRGBDecode());
            break;
        case GL_DEPTH_STENCIL_TEXTURE_MODE:
            *params =
                CastFromGLintStateValue<ParamType>(pname, texture->getDepthStencilTextureMode());
            break;
        default:
            UNREACHABLE();
            break;
    }
}

template <typename ParamType>
void SetTexParameterBase(Context *context, Texture *texture, GLenum pname, const ParamType *params)
{
    ASSERT(texture != nullptr);

    switch (pname)
    {
        case GL_TEXTURE_WRAP_S:
            texture->setWrapS(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_WRAP_T:
            texture->setWrapT(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_WRAP_R:
            texture->setWrapR(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_MIN_FILTER:
            texture->setMinFilter(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_MAG_FILTER:
            texture->setMagFilter(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_USAGE_ANGLE:
            texture->setUsage(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_MAX_ANISOTROPY_EXT:
            texture->setMaxAnisotropy(CastQueryValueTo<GLfloat>(pname, params[0]));
            break;
        case GL_TEXTURE_COMPARE_MODE:
            texture->setCompareMode(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_COMPARE_FUNC:
            texture->setCompareFunc(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_SWIZZLE_R:
            texture->setSwizzleRed(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_SWIZZLE_G:
            texture->setSwizzleGreen(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_SWIZZLE_B:
            texture->setSwizzleBlue(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_SWIZZLE_A:
            texture->setSwizzleAlpha(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_BASE_LEVEL:
        {
            context->handleError(texture->setBaseLevel(
                context, clampCast<GLuint>(CastQueryValueTo<GLint>(pname, params[0]))));
            break;
        }
        case GL_TEXTURE_MAX_LEVEL:
            texture->setMaxLevel(clampCast<GLuint>(CastQueryValueTo<GLint>(pname, params[0])));
            break;
        case GL_TEXTURE_MIN_LOD:
            texture->setMinLod(CastQueryValueTo<GLfloat>(pname, params[0]));
            break;
        case GL_TEXTURE_MAX_LOD:
            texture->setMaxLod(CastQueryValueTo<GLfloat>(pname, params[0]));
            break;
        case GL_DEPTH_STENCIL_TEXTURE_MODE:
            texture->setDepthStencilTextureMode(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_SRGB_DECODE_EXT:
            texture->setSRGBDecode(ConvertToGLenum(pname, 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 = CastFromGLintStateValue<ParamType>(pname, sampler->getMinFilter());
            break;
        case GL_TEXTURE_MAG_FILTER:
            *params = CastFromGLintStateValue<ParamType>(pname, sampler->getMagFilter());
            break;
        case GL_TEXTURE_WRAP_S:
            *params = CastFromGLintStateValue<ParamType>(pname, sampler->getWrapS());
            break;
        case GL_TEXTURE_WRAP_T:
            *params = CastFromGLintStateValue<ParamType>(pname, sampler->getWrapT());
            break;
        case GL_TEXTURE_WRAP_R:
            *params = CastFromGLintStateValue<ParamType>(pname, sampler->getWrapR());
            break;
        case GL_TEXTURE_MAX_ANISOTROPY_EXT:
            *params = CastFromStateValue<ParamType>(pname, sampler->getMaxAnisotropy());
            break;
        case GL_TEXTURE_MIN_LOD:
            *params = CastFromStateValue<ParamType>(pname, sampler->getMinLod());
            break;
        case GL_TEXTURE_MAX_LOD:
            *params = CastFromStateValue<ParamType>(pname, sampler->getMaxLod());
            break;
        case GL_TEXTURE_COMPARE_MODE:
            *params = CastFromGLintStateValue<ParamType>(pname, sampler->getCompareMode());
            break;
        case GL_TEXTURE_COMPARE_FUNC:
            *params = CastFromGLintStateValue<ParamType>(pname, sampler->getCompareFunc());
            break;
        case GL_TEXTURE_SRGB_DECODE_EXT:
            *params = CastFromGLintStateValue<ParamType>(pname, 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(pname, params[0]));
            break;
        case GL_TEXTURE_WRAP_T:
            sampler->setWrapT(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_WRAP_R:
            sampler->setWrapR(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_MIN_FILTER:
            sampler->setMinFilter(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_MAG_FILTER:
            sampler->setMagFilter(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_MAX_ANISOTROPY_EXT:
            sampler->setMaxAnisotropy(CastQueryValueTo<GLfloat>(pname, params[0]));
            break;
        case GL_TEXTURE_COMPARE_MODE:
            sampler->setCompareMode(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_COMPARE_FUNC:
            sampler->setCompareFunc(ConvertToGLenum(pname, params[0]));
            break;
        case GL_TEXTURE_MIN_LOD:
            sampler->setMinLod(CastQueryValueTo<GLfloat>(pname, params[0]));
            break;
        case GL_TEXTURE_MAX_LOD:
            sampler->setMaxLod(CastQueryValueTo<GLfloat>(pname, params[0]));
            break;
        case GL_TEXTURE_SRGB_DECODE_EXT:
            sampler->setSRGBDecode(ConvertToGLenum(pname, params[0]));
            break;
        default:
            UNREACHABLE();
            break;
    }
}

// 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] = CastFromStateValue<ParamType>(pname, currentValueData[i]);
            }
            break;
        case GL_VERTEX_ATTRIB_ARRAY_ENABLED:
            *params = CastFromStateValue<ParamType>(pname, static_cast<GLint>(attrib.enabled));
            break;
        case GL_VERTEX_ATTRIB_ARRAY_SIZE:
            *params = CastFromGLintStateValue<ParamType>(pname, attrib.size);
            break;
        case GL_VERTEX_ATTRIB_ARRAY_STRIDE:
            *params = CastFromGLintStateValue<ParamType>(pname, attrib.vertexAttribArrayStride);
            break;
        case GL_VERTEX_ATTRIB_ARRAY_TYPE:
            *params = CastFromGLintStateValue<ParamType>(pname, attrib.type);
            break;
        case GL_VERTEX_ATTRIB_ARRAY_NORMALIZED:
            *params = CastFromStateValue<ParamType>(pname, static_cast<GLint>(attrib.normalized));
            break;
        case GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING:
            *params = CastFromGLintStateValue<ParamType>(pname, binding.getBuffer().id());
            break;
        case GL_VERTEX_ATTRIB_ARRAY_DIVISOR:
            *params = CastFromGLintStateValue<ParamType>(pname, binding.getDivisor());
            break;
        case GL_VERTEX_ATTRIB_ARRAY_INTEGER:
            *params = CastFromGLintStateValue<ParamType>(pname, attrib.pureInteger);
            break;
        case GL_VERTEX_ATTRIB_BINDING:
            *params = CastFromGLintStateValue<ParamType>(pname, attrib.bindingIndex);
            break;
        case GL_VERTEX_ATTRIB_RELATIVE_OFFSET:
            *params = CastFromGLintStateValue<ParamType>(pname, 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 = CastFromGLintStateValue<ParamType>(pname, ToGLenum(buffer->getUsage()));
            break;
        case GL_BUFFER_SIZE:
            *params = CastFromStateValue<ParamType>(pname, buffer->getSize());
            break;
        case GL_BUFFER_ACCESS_FLAGS:
            *params = CastFromGLintStateValue<ParamType>(pname, buffer->getAccessFlags());
            break;
        case GL_BUFFER_ACCESS_OES:
            *params = CastFromGLintStateValue<ParamType>(pname, buffer->getAccess());
            break;
        case GL_BUFFER_MAPPED:
            *params = CastFromStateValue<ParamType>(pname, buffer->isMapped());
            break;
        case GL_BUFFER_MAP_OFFSET:
            *params = CastFromStateValue<ParamType>(pname, buffer->getMapOffset());
            break;
        case GL_BUFFER_MAP_LENGTH:
            *params = CastFromStateValue<ParamType>(pname, buffer->getMapLength());
            break;
        default:
            UNREACHABLE();
            break;
    }
}

GLint GetCommonVariableProperty(const sh::ShaderVariable &var, GLenum prop)
{
    switch (prop)
    {
        case GL_TYPE:
            return clampCast<GLint>(var.type);

        case GL_ARRAY_SIZE:
            // Queryable variables are guaranteed not to be arrays of arrays or arrays of structs,
            // see GLES 3.1 spec section 7.3.1.1 page 77.
            return clampCast<GLint>(var.getBasicTypeElementCount());

        case GL_NAME_LENGTH:
            // ES31 spec p84: This counts the terminating null char.
            return clampCast<GLint>(var.name.size() + 1u);

        default:
            UNREACHABLE();
            return GL_INVALID_VALUE;
    }
}

GLint GetInputResourceProperty(const Program *program, GLuint index, GLenum prop)
{
    const auto &attribute = program->getInputResource(index);
    switch (prop)
    {
        case GL_TYPE:
        case GL_ARRAY_SIZE:
        case GL_NAME_LENGTH:
            return GetCommonVariableProperty(attribute, prop);

        case GL_LOCATION:
            return program->getAttributeLocation(attribute.name);

        case GL_REFERENCED_BY_VERTEX_SHADER:
            return 1;

        case GL_REFERENCED_BY_FRAGMENT_SHADER:
        case GL_REFERENCED_BY_COMPUTE_SHADER:
            return 0;

        default:
            UNREACHABLE();
            return GL_INVALID_VALUE;
    }
}

GLint GetOutputResourceProperty(const Program *program, GLuint index, const GLenum prop)
{
    const auto &outputVariable = program->getOutputResource(index);
    switch (prop)
    {
        case GL_TYPE:
        case GL_ARRAY_SIZE:
        case GL_NAME_LENGTH:
            return GetCommonVariableProperty(outputVariable, prop);

        case GL_LOCATION:
            return program->getFragDataLocation(outputVariable.name);

        case GL_REFERENCED_BY_VERTEX_SHADER:
            return 0;

        case GL_REFERENCED_BY_FRAGMENT_SHADER:
            return 1;

        case GL_REFERENCED_BY_COMPUTE_SHADER:
            return 0;

        default:
            UNREACHABLE();
            return GL_INVALID_VALUE;
    }
}

GLint GetTransformFeedbackVaryingResourceProperty(const Program *program,
                                                  GLuint index,
                                                  const GLenum prop)
{
    const auto &tfVariable = program->getTransformFeedbackVaryingResource(index);
    switch (prop)
    {
        case GL_TYPE:
            return clampCast<GLint>(tfVariable.type);

        case GL_ARRAY_SIZE:
            return clampCast<GLint>(tfVariable.size());

        case GL_NAME_LENGTH:
            return clampCast<GLint>(tfVariable.nameWithArrayIndex().size() + 1);

        default:
            UNREACHABLE();
            return GL_INVALID_VALUE;
    }
}

GLint QueryProgramInterfaceActiveResources(const Program *program, GLenum programInterface)
{
    switch (programInterface)
    {
        case GL_PROGRAM_INPUT:
            return clampCast<GLint>(program->getAttributes().size());

        case GL_PROGRAM_OUTPUT:
            return clampCast<GLint>(program->getState().getOutputVariables().size());

        case GL_UNIFORM:
            return clampCast<GLint>(program->getState().getUniforms().size());

        case GL_UNIFORM_BLOCK:
            return clampCast<GLint>(program->getState().getUniformBlocks().size());

        case GL_ATOMIC_COUNTER_BUFFER:
            return clampCast<GLint>(program->getState().getAtomicCounterBuffers().size());

        case GL_BUFFER_VARIABLE:
            return clampCast<GLint>(program->getState().getBufferVariables().size());

        case GL_SHADER_STORAGE_BLOCK:
            return clampCast<GLint>(program->getState().getShaderStorageBlocks().size());

        case GL_TRANSFORM_FEEDBACK_VARYING:
            return clampCast<GLint>(program->getTransformFeedbackVaryingCount());

        default:
            UNREACHABLE();
            return 0;
    }
}

template <typename T, typename M>
GLint FindMaxSize(const std::vector<T> &resources, M member)
{
    GLint max = 0;
    for (const T &resource : resources)
    {
        max = std::max(max, clampCast<GLint>((resource.*member).size()));
    }
    return max;
}

GLint QueryProgramInterfaceMaxNameLength(const Program *program, GLenum programInterface)
{
    GLint maxNameLength = 0;
    switch (programInterface)
    {
        case GL_PROGRAM_INPUT:
            maxNameLength = FindMaxSize(program->getAttributes(), &sh::Attribute::name);
            break;

        case GL_PROGRAM_OUTPUT:
            maxNameLength =
                FindMaxSize(program->getState().getOutputVariables(), &sh::OutputVariable::name);
            break;

        case GL_UNIFORM:
            maxNameLength = FindMaxSize(program->getState().getUniforms(), &LinkedUniform::name);
            break;

        case GL_UNIFORM_BLOCK:
            return program->getActiveUniformBlockMaxNameLength();

        case GL_BUFFER_VARIABLE:
            maxNameLength =
                FindMaxSize(program->getState().getBufferVariables(), &BufferVariable::name);
            break;

        case GL_SHADER_STORAGE_BLOCK:
            return program->getActiveShaderStorageBlockMaxNameLength();

        case GL_TRANSFORM_FEEDBACK_VARYING:
            return clampCast<GLint>(program->getTransformFeedbackVaryingMaxLength());

        default:
            UNREACHABLE();
            return 0;
    }
    // This length includes an extra character for the null terminator.
    return (maxNameLength == 0 ? 0 : maxNameLength + 1);
}

GLint QueryProgramInterfaceMaxNumActiveVariables(const Program *program, GLenum programInterface)
{
    switch (programInterface)
    {
        case GL_UNIFORM_BLOCK:
            return FindMaxSize(program->getState().getUniformBlocks(),
                               &InterfaceBlock::memberIndexes);
        case GL_ATOMIC_COUNTER_BUFFER:
            return FindMaxSize(program->getState().getAtomicCounterBuffers(),
                               &AtomicCounterBuffer::memberIndexes);

        case GL_SHADER_STORAGE_BLOCK:
            return FindMaxSize(program->getState().getShaderStorageBlocks(),
                               &InterfaceBlock::memberIndexes);

        default:
            UNREACHABLE();
            return 0;
    }
}

GLenum GetUniformPropertyEnum(GLenum prop)
{
    switch (prop)
    {
        case GL_UNIFORM_TYPE:
            return GL_TYPE;
        case GL_UNIFORM_SIZE:
            return GL_ARRAY_SIZE;
        case GL_UNIFORM_NAME_LENGTH:
            return GL_NAME_LENGTH;
        case GL_UNIFORM_BLOCK_INDEX:
            return GL_BLOCK_INDEX;
        case GL_UNIFORM_OFFSET:
            return GL_OFFSET;
        case GL_UNIFORM_ARRAY_STRIDE:
            return GL_ARRAY_STRIDE;
        case GL_UNIFORM_MATRIX_STRIDE:
            return GL_MATRIX_STRIDE;
        case GL_UNIFORM_IS_ROW_MAJOR:
            return GL_IS_ROW_MAJOR;

        default:
            return prop;
    }
}

GLenum GetUniformBlockPropertyEnum(GLenum prop)
{
    switch (prop)
    {
        case GL_UNIFORM_BLOCK_BINDING:
            return GL_BUFFER_BINDING;

        case GL_UNIFORM_BLOCK_DATA_SIZE:
            return GL_BUFFER_DATA_SIZE;

        case GL_UNIFORM_BLOCK_NAME_LENGTH:
            return GL_NAME_LENGTH;

        case GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS:
            return GL_NUM_ACTIVE_VARIABLES;

        case GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES:
            return GL_ACTIVE_VARIABLES;

        case GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER:
            return GL_REFERENCED_BY_VERTEX_SHADER;

        case GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER:
            return GL_REFERENCED_BY_FRAGMENT_SHADER;

        default:
            return prop;
    }
}

void GetShaderVariableBufferResourceProperty(const ShaderVariableBuffer &buffer,
                                             GLenum pname,
                                             GLint *params,
                                             GLsizei bufSize,
                                             GLsizei *outputPosition)

{
    switch (pname)
    {
        case GL_BUFFER_BINDING:
            params[(*outputPosition)++] = buffer.binding;
            break;
        case GL_BUFFER_DATA_SIZE:
            params[(*outputPosition)++] = clampCast<GLint>(buffer.dataSize);
            break;
        case GL_NUM_ACTIVE_VARIABLES:
            params[(*outputPosition)++] = buffer.numActiveVariables();
            break;
        case GL_ACTIVE_VARIABLES:
            for (size_t memberIndex = 0;
                 memberIndex < buffer.memberIndexes.size() && *outputPosition < bufSize;
                 ++memberIndex)
            {
                params[(*outputPosition)++] = clampCast<GLint>(buffer.memberIndexes[memberIndex]);
            }
            break;
        case GL_REFERENCED_BY_VERTEX_SHADER:
            params[(*outputPosition)++] = static_cast<GLint>(buffer.vertexStaticUse);
            break;
        case GL_REFERENCED_BY_FRAGMENT_SHADER:
            params[(*outputPosition)++] = static_cast<GLint>(buffer.fragmentStaticUse);
            break;
        case GL_REFERENCED_BY_COMPUTE_SHADER:
            params[(*outputPosition)++] = static_cast<GLint>(buffer.computeStaticUse);
            break;
        default:
            UNREACHABLE();
            break;
    }
}

void GetInterfaceBlockResourceProperty(const InterfaceBlock &block,
                                       GLenum pname,
                                       GLint *params,
                                       GLsizei bufSize,
                                       GLsizei *outputPosition)
{
    if (pname == GL_NAME_LENGTH)
    {
        params[(*outputPosition)++] = clampCast<GLint>(block.nameWithArrayIndex().size() + 1);
        return;
    }
    GetShaderVariableBufferResourceProperty(block, pname, params, bufSize, outputPosition);
}

void GetUniformBlockResourceProperty(const Program *program,
                                     GLuint blockIndex,
                                     GLenum pname,
                                     GLint *params,
                                     GLsizei bufSize,
                                     GLsizei *outputPosition)

{
    ASSERT(*outputPosition < bufSize);
    const auto &block = program->getUniformBlockByIndex(blockIndex);
    GetInterfaceBlockResourceProperty(block, pname, params, bufSize, outputPosition);
}

void GetShaderStorageBlockResourceProperty(const Program *program,
                                           GLuint blockIndex,
                                           GLenum pname,
                                           GLint *params,
                                           GLsizei bufSize,
                                           GLsizei *outputPosition)

{
    ASSERT(*outputPosition < bufSize);
    const auto &block = program->getShaderStorageBlockByIndex(blockIndex);
    GetInterfaceBlockResourceProperty(block, pname, params, bufSize, outputPosition);
}

void GetAtomicCounterBufferResourceProperty(const Program *program,
                                            GLuint index,
                                            GLenum pname,
                                            GLint *params,
                                            GLsizei bufSize,
                                            GLsizei *outputPosition)

{
    ASSERT(*outputPosition < bufSize);
    const auto &buffer = program->getState().getAtomicCounterBuffers()[index];
    GetShaderVariableBufferResourceProperty(buffer, pname, params, bufSize, outputPosition);
}

}  // anonymous namespace

void QueryFramebufferAttachmentParameteriv(const Context *context,
                                           const Framebuffer *framebuffer,
                                           GLenum attachment,
                                           GLenum pname,
                                           GLint *params)
{
    ASSERT(framebuffer);

    const FramebufferAttachment *attachmentObject = framebuffer->getAttachment(context, 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:
        {
            TextureTarget face = attachmentObject->cubeMapFace();
            if (face != TextureTarget::InvalidEnum)
            {
                *params = ToGLenum(attachmentObject->cubeMapFace());
            }
            else
            {
                // This happens when the attachment isn't a texture cube map face
                *params = GL_NONE;
            }
        }
        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;

        case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_NUM_VIEWS_ANGLE:
            *params = attachmentObject->getNumViews();
            break;

        case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_MULTIVIEW_LAYOUT_ANGLE:
            *params = static_cast<GLint>(attachmentObject->getMultiviewLayout());
            break;

        case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_BASE_VIEW_INDEX_ANGLE:
            *params = attachmentObject->getBaseViewIndex();
            break;

        case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_VIEWPORT_OFFSETS_ANGLE:
        {
            const std::vector<Offset> &offsets = attachmentObject->getMultiviewViewportOffsets();
            for (size_t i = 0u; i < offsets.size(); ++i)
            {
                params[i * 2u]      = offsets[i].x;
                params[i * 2u + 1u] = offsets[i].y;
            }
        }
        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 Context *context, 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(context);
            return;
        case GL_ACTIVE_UNIFORM_BLOCKS:
            *params = program->getActiveUniformBlockCount();
            return;
        case GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH:
            *params = program->getActiveUniformBlockMaxNameLength();
            break;
        case GL_TRANSFORM_FEEDBACK_BUFFER_MODE:
            *params = program->getTransformFeedbackBufferMode();
            break;
        case GL_TRANSFORM_FEEDBACK_VARYINGS:
            *params = clampCast<GLint>(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;
        case GL_COMPUTE_WORK_GROUP_SIZE:
        {
            const sh::WorkGroupSize &localSize = program->getComputeShaderLocalSize();
            params[0]                          = localSize[0];
            params[1]                          = localSize[1];
            params[2]                          = localSize[2];
        }
        break;
        case GL_ACTIVE_ATOMIC_COUNTER_BUFFERS:
            *params = program->getActiveAtomicCounterBufferCount();
            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 Context *context, 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(context) ? GL_TRUE : GL_FALSE;
            return;
        case GL_INFO_LOG_LENGTH:
            *params = shader->getInfoLogLength(context);
            return;
        case GL_SHADER_SOURCE_LENGTH:
            *params = shader->getSourceLength();
            return;
        case GL_TRANSLATED_SHADER_SOURCE_LENGTH_ANGLE:
            *params = shader->getTranslatedSourceWithDebugInfoLength(context);
            return;
        default:
            UNREACHABLE();
            break;
    }
}

void QueryTexLevelParameterfv(const Texture *texture,
                              TextureTarget target,
                              GLint level,
                              GLenum pname,
                              GLfloat *params)
{
    QueryTexLevelParameterBase(texture, target, level, pname, params);
}

void QueryTexLevelParameteriv(const Texture *texture,
                              TextureTarget 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)
{
    GLenum prop = GetUniformBlockPropertyEnum(pname);
    QueryProgramResourceiv(program, GL_UNIFORM_BLOCK, uniformBlockIndex, 1, &prop,
                           std::numeric_limits<GLsizei>::max(), nullptr, params);
}

void QueryInternalFormativ(const TextureCaps &format, GLenum pname, GLsizei bufSize, GLint *params)
{
    switch (pname)
    {
        case GL_NUM_SAMPLE_COUNTS:
            if (bufSize != 0)
            {
                *params = clampCast<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 = ConvertToGLBoolean(framebuffer->getDefaultFixedSampleLocations());
            break;
        default:
            UNREACHABLE();
            break;
    }
}

Error QuerySynciv(const Sync *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 = clampCast<GLint>(GL_SYNC_FENCE);
            break;
        case GL_SYNC_CONDITION:
            *values = clampCast<GLint>(sync->getCondition());
            break;
        case GL_SYNC_FLAGS:
            *values = clampCast<GLint>(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(Context *context, Texture *texture, GLenum pname, GLfloat param)
{
    SetTexParameterBase(context, texture, pname, &param);
}

void SetTexParameterfv(Context *context, Texture *texture, GLenum pname, const GLfloat *params)
{
    SetTexParameterBase(context, texture, pname, params);
}

void SetTexParameteri(Context *context, Texture *texture, GLenum pname, GLint param)
{
    SetTexParameterBase(context, texture, pname, &param);
}

void SetTexParameteriv(Context *context, Texture *texture, GLenum pname, const GLint *params)
{
    SetTexParameterBase(context, 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(ConvertToBool(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(ConvertToBool(value));
            break;
        case GL_PROGRAM_SEPARABLE:
            program->setSeparable(ConvertToBool(value));
            break;
        default:
            UNREACHABLE();
            break;
    }
}

GLint GetUniformResourceProperty(const Program *program, GLuint index, const GLenum prop)
{
    const auto &uniform = program->getUniformByIndex(index);
    GLenum resourceProp = GetUniformPropertyEnum(prop);
    switch (resourceProp)
    {
        case GL_TYPE:
        case GL_ARRAY_SIZE:
        case GL_NAME_LENGTH:
            return GetCommonVariableProperty(uniform, resourceProp);

        case GL_LOCATION:
            return program->getUniformLocation(uniform.name);

        case GL_BLOCK_INDEX:
            return (uniform.isAtomicCounter() ? -1 : uniform.bufferIndex);

        case GL_OFFSET:
            return uniform.blockInfo.offset;

        case GL_ARRAY_STRIDE:
            return uniform.blockInfo.arrayStride;

        case GL_MATRIX_STRIDE:
            return uniform.blockInfo.matrixStride;

        case GL_IS_ROW_MAJOR:
            return static_cast<GLint>(uniform.blockInfo.isRowMajorMatrix);

        case GL_REFERENCED_BY_VERTEX_SHADER:
            return uniform.vertexStaticUse;

        case GL_REFERENCED_BY_FRAGMENT_SHADER:
            return uniform.fragmentStaticUse;

        case GL_REFERENCED_BY_COMPUTE_SHADER:
            return uniform.computeStaticUse;

        case GL_ATOMIC_COUNTER_BUFFER_INDEX:
            return (uniform.isAtomicCounter() ? uniform.bufferIndex : -1);

        default:
            UNREACHABLE();
            return 0;
    }
}

GLint GetBufferVariableResourceProperty(const Program *program, GLuint index, const GLenum prop)
{
    const auto &bufferVariable = program->getBufferVariableByIndex(index);
    switch (prop)
    {
        case GL_TYPE:
        case GL_ARRAY_SIZE:
        case GL_NAME_LENGTH:
            return GetCommonVariableProperty(bufferVariable, prop);

        case GL_BLOCK_INDEX:
            return bufferVariable.bufferIndex;

        case GL_OFFSET:
            return bufferVariable.blockInfo.offset;

        case GL_ARRAY_STRIDE:
            return bufferVariable.blockInfo.arrayStride;

        case GL_MATRIX_STRIDE:
            return bufferVariable.blockInfo.matrixStride;

        case GL_IS_ROW_MAJOR:
            return static_cast<GLint>(bufferVariable.blockInfo.isRowMajorMatrix);

        case GL_REFERENCED_BY_VERTEX_SHADER:
            return bufferVariable.vertexStaticUse;

        case GL_REFERENCED_BY_FRAGMENT_SHADER:
            return bufferVariable.fragmentStaticUse;

        case GL_REFERENCED_BY_COMPUTE_SHADER:
            return bufferVariable.computeStaticUse;

        case GL_TOP_LEVEL_ARRAY_SIZE:
            return bufferVariable.topLevelArraySize;

        case GL_TOP_LEVEL_ARRAY_STRIDE:
            return bufferVariable.blockInfo.topLevelArrayStride;

        default:
            UNREACHABLE();
            return 0;
    }
}

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);

        case GL_UNIFORM:
            return program->getState().getUniformIndexFromName(name);

        case GL_BUFFER_VARIABLE:
            return program->getState().getBufferVariableIndexFromName(name);

        case GL_SHADER_STORAGE_BLOCK:
            return program->getShaderStorageBlockIndex(name);

        case GL_UNIFORM_BLOCK:
            return program->getUniformBlockIndex(name);

        case GL_TRANSFORM_FEEDBACK_VARYING:
            return program->getTransformFeedbackVaryingResourceIndex(name);

        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;

        case GL_UNIFORM:
            program->getUniformResourceName(index, bufSize, length, name);
            break;

        case GL_BUFFER_VARIABLE:
            program->getBufferVariableResourceName(index, bufSize, length, name);
            break;

        case GL_SHADER_STORAGE_BLOCK:
            program->getActiveShaderStorageBlockName(index, bufSize, length, name);
            break;

        case GL_UNIFORM_BLOCK:
            program->getActiveUniformBlockName(index, bufSize, length, name);
            break;

        case GL_TRANSFORM_FEEDBACK_VARYING:
            program->getTransformFeedbackVarying(index, bufSize, length, nullptr, nullptr, name);
            break;

        default:
            UNREACHABLE();
    }
}

GLint QueryProgramResourceLocation(const Program *program,
                                   GLenum programInterface,
                                   const GLchar *name)
{
    switch (programInterface)
    {
        case GL_PROGRAM_INPUT:
            return program->getAttributeLocation(name);

        case GL_PROGRAM_OUTPUT:
            return program->getFragDataLocation(name);

        case GL_UNIFORM:
            return program->getUniformLocation(name);

        default:
            UNREACHABLE();
            return -1;
    }
}

void QueryProgramResourceiv(const Program *program,
                            GLenum programInterface,
                            GLuint index,
                            GLsizei propCount,
                            const GLenum *props,
                            GLsizei bufSize,
                            GLsizei *length,
                            GLint *params)
{
    if (!program->isLinked())
    {
        if (length != nullptr)
        {
            *length = 0;
        }
        return;
    }

    GLsizei pos = 0;
    for (GLsizei i = 0; i < propCount; i++)
    {
        switch (programInterface)
        {
            case GL_PROGRAM_INPUT:
                params[i] = GetInputResourceProperty(program, index, props[i]);
                ++pos;
                break;

            case GL_PROGRAM_OUTPUT:
                params[i] = GetOutputResourceProperty(program, index, props[i]);
                ++pos;
                break;

            case GL_UNIFORM:
                params[i] = GetUniformResourceProperty(program, index, props[i]);
                ++pos;
                break;

            case GL_BUFFER_VARIABLE:
                params[i] = GetBufferVariableResourceProperty(program, index, props[i]);
                ++pos;
                break;

            case GL_UNIFORM_BLOCK:
                GetUniformBlockResourceProperty(program, index, props[i], params, bufSize, &pos);
                break;

            case GL_SHADER_STORAGE_BLOCK:
                GetShaderStorageBlockResourceProperty(program, index, props[i], params, bufSize,
                                                      &pos);
                break;

            case GL_ATOMIC_COUNTER_BUFFER:
                GetAtomicCounterBufferResourceProperty(program, index, props[i], params, bufSize,
                                                       &pos);
                break;

            case GL_TRANSFORM_FEEDBACK_VARYING:
                params[i] = GetTransformFeedbackVaryingResourceProperty(program, index, props[i]);
                ++pos;
                break;

            default:
                UNREACHABLE();
                params[i] = GL_INVALID_VALUE;
        }
        if (pos == bufSize)
        {
            // Most properties return one value, but GL_ACTIVE_VARIABLES returns an array of values.
            // This checks not to break buffer bounds for such case.
            break;
        }
    }

    if (length != nullptr)
    {
        *length = pos;
    }
}

void QueryProgramInterfaceiv(const Program *program,
                             GLenum programInterface,
                             GLenum pname,
                             GLint *params)
{
    switch (pname)
    {
        case GL_ACTIVE_RESOURCES:
            *params = QueryProgramInterfaceActiveResources(program, programInterface);
            break;

        case GL_MAX_NAME_LENGTH:
            *params = QueryProgramInterfaceMaxNameLength(program, programInterface);
            break;

        case GL_MAX_NUM_ACTIVE_VARIABLES:
            *params = QueryProgramInterfaceMaxNumActiveVariables(program, programInterface);
            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;
    }
}

void QueryContextAttrib(const gl::Context *context, EGLint attribute, EGLint *value)
{
    switch (attribute)
    {
        case EGL_CONFIG_ID:
            *value = context->getConfig()->configID;
            break;
        case EGL_CONTEXT_CLIENT_TYPE:
            *value = context->getClientType();
            break;
        case EGL_CONTEXT_CLIENT_VERSION:
            *value = context->getClientMajorVersion();
            break;
        case EGL_RENDER_BUFFER:
            *value = context->getRenderBuffer();
            break;
        case EGL_ROBUST_RESOURCE_INITIALIZATION_ANGLE:
            *value = context->isRobustResourceInitEnabled();
            break;
        default:
            UNREACHABLE();
            break;
    }
}

void QuerySurfaceAttrib(const Surface *surface, EGLint attribute, EGLint *value)
{
    switch (attribute)
    {
        case EGL_GL_COLORSPACE:
            *value = surface->getGLColorspace();
            break;
        case EGL_VG_ALPHA_FORMAT:
            *value = surface->getVGAlphaFormat();
            break;
        case EGL_VG_COLORSPACE:
            *value = surface->getVGColorspace();
            break;
        case EGL_CONFIG_ID:
            *value = surface->getConfig()->configID;
            break;
        case EGL_HEIGHT:
            *value = surface->getHeight();
            break;
        case EGL_HORIZONTAL_RESOLUTION:
            *value = surface->getHorizontalResolution();
            break;
        case EGL_LARGEST_PBUFFER:
            // The EGL spec states that value is not written if the surface is not a pbuffer
            if (surface->getType() == EGL_PBUFFER_BIT)
            {
                *value = surface->getLargestPbuffer();
            }
            break;
        case EGL_MIPMAP_TEXTURE:
            // The EGL spec states that value is not written if the surface is not a pbuffer
            if (surface->getType() == EGL_PBUFFER_BIT)
            {
                *value = surface->getMipmapTexture();
            }
            break;
        case EGL_MIPMAP_LEVEL:
            // The EGL spec states that value is not written if the surface is not a pbuffer
            if (surface->getType() == EGL_PBUFFER_BIT)
            {
                *value = surface->getMipmapLevel();
            }
            break;
        case EGL_MULTISAMPLE_RESOLVE:
            *value = surface->getMultisampleResolve();
            break;
        case EGL_PIXEL_ASPECT_RATIO:
            *value = surface->getPixelAspectRatio();
            break;
        case EGL_RENDER_BUFFER:
            *value = surface->getRenderBuffer();
            break;
        case EGL_SWAP_BEHAVIOR:
            *value = surface->getSwapBehavior();
            break;
        case EGL_TEXTURE_FORMAT:
            // The EGL spec states that value is not written if the surface is not a pbuffer
            if (surface->getType() == EGL_PBUFFER_BIT)
            {
                *value = surface->getTextureFormat();
            }
            break;
        case EGL_TEXTURE_TARGET:
            // The EGL spec states that value is not written if the surface is not a pbuffer
            if (surface->getType() == EGL_PBUFFER_BIT)
            {
                *value = surface->getTextureTarget();
            }
            break;
        case EGL_VERTICAL_RESOLUTION:
            *value = surface->getVerticalResolution();
            break;
        case EGL_WIDTH:
            *value = surface->getWidth();
            break;
        case EGL_POST_SUB_BUFFER_SUPPORTED_NV:
            *value = surface->isPostSubBufferSupported();
            break;
        case EGL_FIXED_SIZE_ANGLE:
            *value = surface->isFixedSize();
            break;
        case EGL_FLEXIBLE_SURFACE_COMPATIBILITY_SUPPORTED_ANGLE:
            *value = surface->flexibleSurfaceCompatibilityRequested();
            break;
        case EGL_SURFACE_ORIENTATION_ANGLE:
            *value = surface->getOrientation();
            break;
        case EGL_DIRECT_COMPOSITION_ANGLE:
            *value = surface->directComposition();
            break;
        case EGL_ROBUST_RESOURCE_INITIALIZATION_ANGLE:
            *value = surface->isRobustResourceInitEnabled();
            break;
        default:
            UNREACHABLE();
            break;
    }
}

void SetSurfaceAttrib(Surface *surface, EGLint attribute, EGLint value)
{
    switch (attribute)
    {
        case EGL_MIPMAP_LEVEL:
            surface->setMipmapLevel(value);
            break;
        case EGL_MULTISAMPLE_RESOLVE:
            surface->setMultisampleResolve(value);
            break;
        case EGL_SWAP_BEHAVIOR:
            surface->setSwapBehavior(value);
            break;
        default:
            UNREACHABLE();
            break;
    }
}

}  // namespace egl
kc3-lang/angle/src/libANGLE/queryutils.cpp

Commit

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