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

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

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#include "../Device.h"

CC_BACKEND_BEGIN
/**
 * @addtogroup _opengl
 * @{
 */

/**
 * Use to create resoureces.
 */
class DeviceGL : public Device
{
public:
    DeviceGL();
    ~DeviceGL();

    /**
     * New a CommandBuffer object, not auto released.
     * @return A CommandBuffer object.
     */
    virtual CommandBuffer* newCommandBuffer() override;

    /**
     * New a Buffer object, not auto released.
     * @param size Specifies the size in bytes of the buffer object's new data store.
     * @param type Specifies the target buffer object. The symbolic constant must be BufferType::VERTEX or BufferType::INDEX.
     * @param usage Specifies the expected usage pattern of the data store. The symbolic constant must be BufferUsage::STATIC, BufferUsage::DYNAMIC.
     * @return A Buffer object.
     */
    virtual Buffer* newBuffer(unsigned int size, BufferType type, BufferUsage usage) override;

    /**
     * New a TextureBackend object, not auto released.
     * @param descriptor Specifies texture description.
     * @return A TextureBackend object.
     */
    virtual TextureBackend* newTexture(const TextureDescriptor& descriptor) override;

    /**
     * Create an auto released DepthStencilState object.
     * @param descriptor Specifies depth and stencil description.
     * @return An auto release DepthStencilState object.
     */
    virtual DepthStencilState* createDepthStencilState(const DepthStencilDescriptor& descriptor) override;

    /**
     * Create an auto released BlendState object.
     * @param descriptor Specifies blend description.
     * @return An auto release BlendState object.
     */
    virtual BlendState* createBlendState(const BlendDescriptor& descriptor) override;

    /**
     * New a RenderPipeline object, not auto released.
     * @param descriptor Specifies render pipeline description.
     * @return A RenderPipeline object.
     */
    virtual RenderPipeline* newRenderPipeline(const RenderPipelineDescriptor& descriptor) override;

    /**
     * Design for metal.
     */
    virtual void setFrameBufferOnly(bool frameBufferOnly) override {}

protected:
    /**
     * New a shaderModule, not auto released.
     * @param stage Specifies whether is vertex shader or fragment shader.
     * @param source Specifies shader source.
     * @return A ShaderModule object.
     */
    virtual ShaderModule* newShaderModule(ShaderStage stage, const std::string& source) override;

    /**
     * New a Program, not auto released.
     * @param vertexShader Specifes this is a vertex shader source.
     * @param fragmentShader Specifes this is a fragment shader source.
     * @return A Program object.
     */
    virtual Program* newProgram(const std::string& vertexShader, const std::string& fragmentShader) override;

};
//end of _opengl group
/// @}
CC_BACKEND_END