axmol/cocos/renderer/backend/ProgramState.cpp

/****************************************************************************
 Copyright (c) 2018-2019 Xiamen Yaji Software Co., Ltd.
 Copyright (c) 2021 Bytedance Inc.

 https://adxe.org

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 all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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#include "renderer/backend/ProgramState.h"
#include "renderer/backend/ProgramCache.h"
#include "renderer/backend/Program.h"
#include "renderer/backend/Texture.h"
#include "renderer/backend/Types.h"
#include "base/CCEventDispatcher.h"
#include "base/CCEventType.h"
#include "base/CCDirector.h"
#include <algorithm>

#include "xxhash.h"

#ifdef CC_USE_METAL
#    include "glsl_optimizer.h"
#endif

CC_BACKEND_BEGIN

namespace
{
#define MAT3_SIZE 36
#define MAT4X3_SIZE 48
#define VEC3_SIZE 12
#define VEC4_SIZE 16
#define BVEC3_SIZE 3
#define BVEC4_SIZE 4
#define IVEC3_SIZE 12
#define IVEC4_SIZE 16

void convertbVec3TobVec4(const bool* src, bool* dst)
{
    dst[0] = src[0];
    dst[1] = src[1];
    dst[2] = src[2];
    dst[3] = false;
}

void convertiVec3ToiVec4(const int* src, int* dst)
{
    dst[0] = src[0];
    dst[1] = src[1];
    dst[2] = src[2];
    dst[3] = 0;
}

void convertVec3ToVec4(const float* src, float* dst)
{
    dst[0] = src[0];
    dst[1] = src[1];
    dst[2] = src[2];
    dst[3] = 0.0f;
}

void convertMat3ToMat4x3(const float* src, float* dst)
{
    dst[3] = dst[7] = dst[11] = 0.0f;
    dst[0]                    = src[0];
    dst[1]                    = src[1];
    dst[2]                    = src[2];
    dst[4]                    = src[3];
    dst[5]                    = src[4];
    dst[6]                    = src[5];
    dst[8]                    = src[6];
    dst[9]                    = src[7];
    dst[10]                   = src[8];
}
}  // namespace

// static field
std::vector<ProgramState::AutoBindingResolver*> ProgramState::_customAutoBindingResolvers;

TextureInfo::TextureInfo(std::vector<int>&& _slots, std::vector<backend::TextureBackend*>&& _textures)
    : TextureInfo(std::move(_slots), std::vector<int>(_slots.size(), 0), std::move(_textures))
{}

TextureInfo::TextureInfo(std::vector<int>&& _slots,
                         std::vector<int>&& _indexs,
                         std::vector<backend::TextureBackend*>&& _textures)
    : slots(std::move(_slots)), indexs(std::move(_indexs)), textures(std::move(_textures))
{
    retainTextures();
}

/* CLASS TextureInfo */
TextureInfo::TextureInfo(const TextureInfo& other)
{
    this->assign(other);
}

TextureInfo::TextureInfo(TextureInfo&& other)
{
    this->assign(std::move(other));
}

TextureInfo::~TextureInfo()
{
    releaseTextures();
}

void TextureInfo::retainTextures()
{
    for (auto& texture : textures)
        CC_SAFE_RETAIN(texture);
}

void TextureInfo::releaseTextures()
{
    for (auto& texture : textures)
        CC_SAFE_RELEASE(texture);
    textures.clear();
}

TextureInfo& TextureInfo::operator=(const TextureInfo& other) noexcept
{
    this->assign(other);
    return *this;
}

TextureInfo& TextureInfo::operator=(TextureInfo&& other) noexcept
{
    this->assign(std::move(other));
    return *this;
}

void TextureInfo::assign(const TextureInfo& other)
{
    if (this != &other)
    {
        releaseTextures();

        indexs   = other.indexs;
        slots    = other.slots;
        textures = other.textures;
        retainTextures();

#if CC_ENABLE_CACHE_TEXTURE_DATA
        location = other.location;
#endif
    }
}

void TextureInfo::assign(TextureInfo&& other)
{
    if (this != &other)
    {
        releaseTextures();

        indexs   = std::move(other.indexs);
        slots    = std::move(other.slots);
        textures = std::move(other.textures);

#if CC_ENABLE_CACHE_TEXTURE_DATA
        location       = other.location;
        other.location = -1;
#endif
    }
}

/* CLASS ProgramState */
ProgramState::ProgramState(Program* program)
{
    init(program);
}

bool ProgramState::init(Program* program)
{
    CC_SAFE_RETAIN(program);
    _program                 = program;
    _vertexUniformBufferSize = _program->getUniformBufferSize(ShaderStage::VERTEX);
    _vertexUniformBuffer     = (char*)calloc(1, _vertexUniformBufferSize);
#ifdef CC_USE_METAL
    _fragmentUniformBufferSize = _program->getUniformBufferSize(ShaderStage::FRAGMENT);
    _fragmentUniformBuffer     = (char*)calloc(1, _fragmentUniformBufferSize);
#endif
#ifdef CC_USE_METAL
    _uniformHashState = XXH32_createState();
#endif

#if CC_ENABLE_CACHE_TEXTURE_DATA
    _backToForegroundListener =
        EventListenerCustom::create(EVENT_RENDERER_RECREATED, [this](EventCustom*) { this->resetUniforms(); });
    Director::getInstance()->getEventDispatcher()->addEventListenerWithFixedPriority(_backToForegroundListener, -1);
#endif
    return true;
}

void ProgramState::resetUniforms()
{
#if CC_ENABLE_CACHE_TEXTURE_DATA
    if (_program == nullptr)
        return;

    const auto& uniformLocation = _program->getAllUniformsLocation();
    for (const auto& uniform : uniformLocation)
    {
        auto location       = uniform.second;
        auto mappedLocation = _program->getMappedLocation(location);

        // check if current location had been set before
        if (_vertexTextureInfos.find(location) != _vertexTextureInfos.end())
        {
            _vertexTextureInfos[location].location = mappedLocation;
        }
    }
#endif
}

ProgramState::~ProgramState()
{
#ifdef CC_USE_METAL
    XXH32_freeState(_uniformHashState);
#endif
    CC_SAFE_RELEASE(_program);
    CC_SAFE_FREE(_vertexUniformBuffer);
    CC_SAFE_FREE(_fragmentUniformBuffer);

#if CC_ENABLE_CACHE_TEXTURE_DATA
    Director::getInstance()->getEventDispatcher()->removeEventListener(_backToForegroundListener);
#endif
}

ProgramState* ProgramState::clone() const
{
    ProgramState* cp          = new ProgramState(_program);
    cp->_vertexTextureInfos   = _vertexTextureInfos;
    cp->_fragmentTextureInfos = _fragmentTextureInfos;
    memcpy(cp->_vertexUniformBuffer, _vertexUniformBuffer, _vertexUniformBufferSize);
    cp->_vertexLayout = _vertexLayout;
#ifdef CC_USE_METAL
    memcpy(cp->_fragmentUniformBuffer, _fragmentUniformBuffer, _fragmentUniformBufferSize);
#endif
    cp->_uniformID = _uniformID;
    return cp;
}

backend::UniformLocation ProgramState::getUniformLocation(backend::Uniform name) const
{
    return _program->getUniformLocation(name);
}

backend::UniformLocation ProgramState::getUniformLocation(std::string_view uniform) const
{
    return _program->getUniformLocation(uniform);
}

void ProgramState::setCallbackUniform(const backend::UniformLocation& uniformLocation, const UniformCallback& callback)
{
    _callbackUniforms[uniformLocation] = callback;
}

void ProgramState::setUniform(const backend::UniformLocation& uniformLocation, const void* data, std::size_t size)
{
    switch (uniformLocation.shaderStage)
    {
    case backend::ShaderStage::VERTEX:
        setVertexUniform(uniformLocation.location[0], data, size, uniformLocation.location[1]);
        break;
    case backend::ShaderStage::FRAGMENT:
        setFragmentUniform(uniformLocation.location[1], data, size);
        break;
    case backend::ShaderStage::VERTEX_AND_FRAGMENT:
        setVertexUniform(uniformLocation.location[0], data, size, uniformLocation.location[1]);
        setFragmentUniform(uniformLocation.location[1], data, size);
        break;
    default:
        break;
    }
}

#ifdef CC_USE_METAL
void ProgramState::convertAndCopyUniformData(const backend::UniformInfo& uniformInfo,
                                             const void* srcData,
                                             std::size_t srcSize,
                                             void* buffer)
{
    auto basicType      = static_cast<glslopt_basic_type>(uniformInfo.type);
    char* convertedData = new char[uniformInfo.size];
    memset(convertedData, 0, uniformInfo.size);
    int offset = 0;
    switch (basicType)
    {
    case kGlslTypeFloat:
    {
        if (uniformInfo.isMatrix)
        {
            for (int i = 0; i < uniformInfo.count; i++)
            {
                if (offset >= srcSize)
                    break;

                convertMat3ToMat4x3((float*)srcData + offset, (float*)convertedData + i * MAT4X3_SIZE);
                offset += MAT3_SIZE;
            }
        }
        else
        {
            for (int i = 0; i < uniformInfo.count; i++)
            {
                if (offset >= srcSize)
                    break;

                convertVec3ToVec4((float*)srcData + offset, (float*)convertedData + i * VEC4_SIZE);
                offset += VEC3_SIZE;
            }
        }
        break;
    }
    case kGlslTypeBool:
    {
        for (int i = 0; i < uniformInfo.count; i++)
        {
            if (offset >= srcSize)
                break;

            convertbVec3TobVec4((bool*)srcData + offset, (bool*)convertedData + i * BVEC4_SIZE);
            offset += BVEC3_SIZE;
        }
        break;
    }
    case kGlslTypeInt:
    {
        for (int i = 0; i < uniformInfo.count; i++)
        {
            if (offset >= srcSize)
                break;

            convertiVec3ToiVec4((int*)srcData + offset, (int*)convertedData + i * IVEC4_SIZE);
            offset += IVEC3_SIZE;
        }
        break;
    }
    default:
        CC_ASSERT(false);
        break;
    }

    memcpy((char*)buffer + uniformInfo.location, convertedData, uniformInfo.size);
    CC_SAFE_DELETE_ARRAY(convertedData);
}
#endif

void ProgramState::setVertexUniform(int location, const void* data, std::size_t size, std::size_t offset)
{
    if (location < 0)
        return;

// float3 etc in Metal has both sizeof and alignment same as float4, need convert to correct laytout
#ifdef CC_USE_METAL
    const auto& uniformInfo = _program->getActiveUniformInfo(ShaderStage::VERTEX, location);
    if (uniformInfo.needConvert)
    {
        convertAndCopyUniformData(uniformInfo, data, size, _vertexUniformBuffer);
    }
    else
    {
        memcpy(_vertexUniformBuffer + location, data, size);
    }
#else
    memcpy(_vertexUniformBuffer + offset, data, size);
#endif
}

void ProgramState::setFragmentUniform(int location, const void* data, std::size_t size)
{
    if (location < 0)
        return;

// float3 etc in Metal has both sizeof and alignment same as float4, need convert to correct laytout
#ifdef CC_USE_METAL
    const auto& uniformInfo = _program->getActiveUniformInfo(ShaderStage::FRAGMENT, location);
    if (uniformInfo.needConvert)
    {
        convertAndCopyUniformData(uniformInfo, data, size, _fragmentUniformBuffer);
    }
    else
    {
        memcpy(_fragmentUniformBuffer + location, data, size);
    }
#endif
}

void ProgramState::updateUniformID(int uniformID)
{
    if (uniformID == -1)
    {
#ifdef CC_USE_METAL
        XXH32_reset(_uniformHashState, 0);
        XXH32_update(_uniformHashState, _vertexUniformBuffer, _vertexUniformBufferSize);
        XXH32_update(_uniformHashState, _fragmentUniformBuffer, _fragmentUniformBufferSize);
        _uniformID = XXH32_digest(_uniformHashState);
#else
        _uniformID = XXH32(_vertexUniformBuffer, _vertexUniformBufferSize, 0);
#endif
    }
    else
    {
        _uniformID = uniformID;
    }
}

void ProgramState::setTexture(backend::TextureBackend* texture)
{
    for (int slot = 0; slot < texture->getCount() && slot < CC_META_TEXTURES; ++slot)
    {
        auto location = getUniformLocation((backend::Uniform)(backend::Uniform::TEXTURE + slot));
        setTexture(location, slot, slot, texture);
    }
}

void ProgramState::setTexture(const backend::UniformLocation& uniformLocation,
                              int slot,
                              backend::TextureBackend* texture)
{
    setTexture(uniformLocation, slot, 0, texture);
}

void ProgramState::setTexture(const backend::UniformLocation& uniformLocation,
                              int slot,
                              int index,
                              backend::TextureBackend* texture)
{
    switch (uniformLocation.shaderStage)
    {
    case backend::ShaderStage::VERTEX:
        setTexture(uniformLocation.location[0], slot, index, texture, _vertexTextureInfos);
        break;
    case backend::ShaderStage::FRAGMENT:
        setTexture(uniformLocation.location[1], slot, index, texture, _fragmentTextureInfos);
        break;
    case backend::ShaderStage::VERTEX_AND_FRAGMENT:
        setTexture(uniformLocation.location[0], slot, index, texture, _vertexTextureInfos);
        setTexture(uniformLocation.location[1], slot, index, texture, _fragmentTextureInfos);
        break;
    default:
        break;
    }
}

void ProgramState::setTextureArray(const backend::UniformLocation& uniformLocation,
                                   std::vector<int> slots,
                                   std::vector<backend::TextureBackend*> textures)
{
    switch (uniformLocation.shaderStage)
    {
    case backend::ShaderStage::VERTEX:
        setTextureArray(uniformLocation.location[0], std::move(slots), std::move(textures), _vertexTextureInfos);
        break;
    case backend::ShaderStage::FRAGMENT:
        setTextureArray(uniformLocation.location[1], std::move(slots), std::move(textures), _fragmentTextureInfos);
        break;
    case backend::ShaderStage::VERTEX_AND_FRAGMENT:
        setTextureArray(uniformLocation.location[0], std::move(slots), std::move(textures), _vertexTextureInfos);
        setTextureArray(uniformLocation.location[1], std::move(slots), std::move(textures), _fragmentTextureInfos);
        break;
    default:
        break;
    }
}

void ProgramState::setTexture(int location,
                              int slot,
                              int index,
                              backend::TextureBackend* texture,
                              std::unordered_map<int, TextureInfo>& textureInfo)
{
    if (location < 0)
        return;

    auto& info = textureInfo[location];
    info       = {{slot}, {index}, {texture}};

#if CC_ENABLE_CACHE_TEXTURE_DATA
    info.location = location;
#endif
}

void ProgramState::setTextureArray(int location,
                                   std::vector<int> slots,
                                   std::vector<backend::TextureBackend*> textures,
                                   std::unordered_map<int, TextureInfo>& textureInfo)
{
    assert(slots.size() == textures.size());

    auto& info = textureInfo[location];
    info       = {std::move(slots), std::move(textures)};

#if CC_ENABLE_CACHE_TEXTURE_DATA
    info.location = location;
#endif
}

void ProgramState::setParameterAutoBinding(std::string_view uniform, std::string_view autoBinding)
{
    _autoBindings.emplace(uniform, autoBinding);
    applyAutoBinding(uniform, autoBinding);
}

void ProgramState::applyAutoBinding(std::string_view uniformName, std::string_view autoBinding)
{
    for (const auto resolver : _customAutoBindingResolvers)
    {
        if (resolver->resolveAutoBinding(this, uniformName, autoBinding))
            break;
    }
}

ProgramState::AutoBindingResolver::AutoBindingResolver()
{
    _customAutoBindingResolvers.emplace_back(this);
}

ProgramState::AutoBindingResolver::~AutoBindingResolver()
{
    auto& list = _customAutoBindingResolvers;
    list.erase(std::remove(list.begin(), list.end(), this), list.end());
}

void ProgramState::getVertexUniformBuffer(char** buffer, std::size_t& size) const
{
    *buffer = _vertexUniformBuffer;
    size    = _vertexUniformBufferSize;
}

void ProgramState::getFragmentUniformBuffer(char** buffer, std::size_t& size) const
{
    *buffer = _fragmentUniformBuffer;
    size    = _fragmentUniformBufferSize;
}

CC_BACKEND_END