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

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

 http://www.cocos2d-x.org

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 of this software and associated documentation files (the "Software"), to deal
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 all copies or substantial portions of the Software.

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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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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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 THE SOFTWARE.
 ****************************************************************************/
 
#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 (std::nothrow) DeviceGL();
    
    return _instance;
}

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

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

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

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

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

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

RenderTarget* DeviceGL::newRenderTarget(TargetBufferFlags rtf,
    TextureBackend* colorAttachment,
    TextureBackend* depthAttachment,
    TextureBackend* stencilAttachhment)
{
    auto rtGL = new RenderTargetGL(false);
    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, const std::string& source)
{
    return new (std::nothrow) ShaderModuleGL(stage, source);
}

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

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

Program* DeviceGL::newProgram(const std::string& vertexShader, const std::string& fragmentShader)
{
    return new (std::nothrow) ProgramGL(vertexShader, fragmentShader);
}

CC_BACKEND_END