axmol/core/renderer/backend/opengl/DeviceInfoGL.h

    /****************************************************************************
 Copyright (c) 2018-2019 Xiamen Yaji Software Co., Ltd.
 Copyright (c) 2020 C4games Ltd

 https://axmolengine.github.io/

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
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 The above copyright notice and this permission notice shall be included in
 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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 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ****************************************************************************/

#pragma once

#include "../DeviceInfo.h"

#include "platform/PlatformConfig.h"
#include "base/hlookup.h"

NS_AX_BACKEND_BEGIN
/**
 * @addtogroup _opengl
 * @{
 */

/**
 * Used to query features and implementation limits
 */
class DeviceInfoGL : public DeviceInfo
{
public:
    DeviceInfoGL()          = default;
    virtual ~DeviceInfoGL() = default;

    /**
     * Gather features and implementation limits
     */
    virtual bool init() override;

    /**
     * Get vendor device name.
     * @return Vendor device name.
     */
    virtual const char* getVendor() const override;

    /**
     * Get the full name of the vendor device.
     * @return The full name of the vendor device.
     */
    virtual const char* getRenderer() const override;

    /**
     * Get version name.
     * @return Version name.
     */
    virtual const char* getVersion() const override;

    const char* getShaderVersion() const override;

    /**
     * Check does device has extension.
     */
    virtual bool hasExtension(std::string_view /*extName*/) const override;

    /**
    * Dump all extensions to string
    */
    virtual std::string dumpExtensions() const override;

    /**
     * Check if feature supported by OpenGL ES.
     * @param feature Specify feature to be query.
     * @return true if the feature is supported, false otherwise.
     */
    virtual bool checkForFeatureSupported(FeatureType feature) override;

    /*
    * Check does the device only support GLES2.0
    */
    bool isGLES2Only() const;

private:
    std::set<uint32_t> _glExtensions;

    const char* _vendor{nullptr};
    const char* _renderer{nullptr};
    const char* _version{nullptr};
    const char* _shaderVer{nullptr};

    struct VersionInfo
    {
        bool es{false};     // is GLES?
        uint16_t major{0};  // major version
        uint16_t minor{0};  // minor version
    } _verInfo;

    bool _textureCompressionAstc = false;
    bool _textureCompressionEtc2 = false;
};

// end of _opengl group
/// @}
NS_AX_BACKEND_END