axmol/core/renderer/backend/metal/ProgramMTL.mm

/****************************************************************************
 Copyright (c) 2018-2019 Xiamen Yaji Software Co., Ltd.
 Copyright (c) 2019-present Axmol Engine contributors (see AUTHORS.md).

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 all copies or substantial portions of the Software.

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#include "ProgramMTL.h"
#include "ShaderModuleMTL.h"
#include "base/Macros.h"
#include "DriverMTL.h"

NS_AX_BACKEND_BEGIN
namespace
{
// constexpr std::string_view metalSpecificDefine = "#define METAL\n"sv;
}

ProgramMTL::ProgramMTL(std::string_view vertexShader, std::string_view fragmentShader)
    : Program(vertexShader, fragmentShader)
{
    _vertexShader = static_cast<ShaderModuleMTL*>(ShaderCache::getInstance()->newVertexShaderModule(vertexShader));
    _fragmentShader = static_cast<ShaderModuleMTL*>(ShaderCache::getInstance()->newFragmentShaderModule(fragmentShader));

    AX_SAFE_RETAIN(_vertexShader);
    AX_SAFE_RETAIN(_fragmentShader);
}

ProgramMTL::~ProgramMTL()
{
    AX_SAFE_RELEASE(_vertexShader);
    AX_SAFE_RELEASE(_fragmentShader);
}

int ProgramMTL::getAttributeLocation(Attribute name) const
{
    return _vertexShader->getAttributeLocation(name);
}

int ProgramMTL::getAttributeLocation(std::string_view name) const
{
    return _vertexShader->getAttributeLocation(name);
}

UniformLocation ProgramMTL::getUniformLocation(backend::Uniform name) const
{
    UniformLocation uniformLocation;
    uniformLocation = _vertexShader->getUniformLocation(name);
    if (uniformLocation.location[0] != -1)
        return uniformLocation;
    return _fragmentShader->getUniformLocation(name);
}

UniformLocation ProgramMTL::getUniformLocation(std::string_view uniform) const
{
    UniformLocation uniformLocation;
    uniformLocation = _vertexShader->getUniformLocation(uniform);
    if (uniformLocation.location[0] != -1)
        return uniformLocation;
    return _fragmentShader->getUniformLocation(uniform);
}

int ProgramMTL::getMaxVertexLocation() const
{
    return _vertexShader->getMaxLocation();
}

int ProgramMTL::getMaxFragmentLocation() const
{
    return _fragmentShader->getMaxLocation();
}

const hlookup::string_map<AttributeBindInfo>& ProgramMTL::getActiveAttributes() const
{
    return _vertexShader->getAttributeInfo();
}

std::size_t ProgramMTL::getUniformBufferSize(ShaderStage stage) const
{
    switch (stage)
    {
    case ShaderStage::VERTEX:
        return _vertexShader->getUniformBufferSize();
    case ShaderStage::FRAGMENT:
        return _fragmentShader->getUniformBufferSize();
    default:
        AXASSERT(false, "Invalid shader stage.");
        break;
    }
    return 0;
}

const hlookup::string_map<UniformInfo>& ProgramMTL::getAllActiveUniformInfo(ShaderStage stage) const
{
    switch (stage)
    {
    case ShaderStage::VERTEX:
        return _vertexShader->getAllActiveUniformInfo();
    case ShaderStage::FRAGMENT:
        return _fragmentShader->getAllActiveUniformInfo();
    default:
        AXASSERT(false, "Invalid shader stage.");
    }
}

NS_AX_BACKEND_END