axmol/core/renderer/backend/opengl/DeviceGL.cpp

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

 https://adxeproject.github.io/

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 of this software and associated documentation files (the "Software"), to deal
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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 THE SOFTWARE.
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#include "DeviceGL.h"
#include "RenderPipelineGL.h"
#include "BufferGL.h"
#include "ShaderModuleGL.h"
#include "CommandBufferGL.h"
#include "TextureGL.h"
#include "DepthStencilStateGL.h"
#include "ProgramGL.h"
#include "DeviceInfoGL.h"
#include "RenderTargetGL.h"

CC_BACKEND_BEGIN

Device* Device::getInstance()
{
    if (!_instance)
        _instance = new DeviceGL();

    return _instance;
}

DeviceGL::DeviceGL()
{
    _deviceInfo = new DeviceInfoGL();
    if (!_deviceInfo->init())
    {
        delete _deviceInfo;
        _deviceInfo = nullptr;
    }

    glGetIntegerv(GL_FRAMEBUFFER_BINDING, &_defaultFBO);
}

DeviceGL::~DeviceGL()
{
    ProgramCache::destroyInstance();
    delete _deviceInfo;
    _deviceInfo = nullptr;
}

GLint DeviceGL::getDefaultFBO() const
{
    return _defaultFBO;
}

CommandBuffer* DeviceGL::newCommandBuffer()
{
    return new CommandBufferGL();
}

Buffer* DeviceGL::newBuffer(std::size_t size, BufferType type, BufferUsage usage)
{
    return new BufferGL(size, type, usage);
}

TextureBackend* DeviceGL::newTexture(const TextureDescriptor& descriptor)
{
    switch (descriptor.textureType)
    {
    case TextureType::TEXTURE_2D:
        return new Texture2DGL(descriptor);
    case TextureType::TEXTURE_CUBE:
        return new TextureCubeGL(descriptor);
    default:
        return nullptr;
    }
}

RenderTarget* DeviceGL::newDefaultRenderTarget(TargetBufferFlags rtf)
{
    auto rtGL = new RenderTargetGL(true, this);
    rtGL->setTargetFlags(rtf);
    return rtGL;
}

RenderTarget* DeviceGL::newRenderTarget(TargetBufferFlags rtf,
                                        TextureBackend* colorAttachment,
                                        TextureBackend* depthAttachment,
                                        TextureBackend* stencilAttachhment)
{
    auto rtGL = new RenderTargetGL(false, this);
    rtGL->setTargetFlags(rtf);
    rtGL->bindFrameBuffer();
    RenderTarget::ColorAttachment colors{{colorAttachment, 0}};
    rtGL->setColorAttachment(colors);
    rtGL->setDepthAttachment(depthAttachment);
    rtGL->setStencilAttachment(stencilAttachhment);
    return rtGL;
}

ShaderModule* DeviceGL::newShaderModule(ShaderStage stage, std::string_view source)
{
    return new ShaderModuleGL(stage, source);
}

DepthStencilState* DeviceGL::newDepthStencilState()
{
    return new DepthStencilStateGL();
}

RenderPipeline* DeviceGL::newRenderPipeline()
{
    return new RenderPipelineGL();
}

Program* DeviceGL::newProgram(std::string_view vertexShader, std::string_view fragmentShader)
{
    return new ProgramGL(vertexShader, fragmentShader);
}

CC_BACKEND_END