display_server.h

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// =====================================================================================================================
//  fennec, a free and open source game engine
//  Copyright © 2025  Medusa Slockbower
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
// =====================================================================================================================
 
 
#ifndef FENNEC_PLATFORM_INTERFACE_DISPLAY_SERVER_H
#define FENNEC_PLATFORM_INTERFACE_DISPLAY_SERVER_H
 
#include <fennec/containers/bitfield.h>
 
#include <fennec/platform/interface/fwd.h>
#include <fennec/platform/interface/window.h>
 
#include <fennec/renderers/interface/gfxcontext.h>
 
#include <fennec/rtti/enable.h>
#include <fennec/rtti/type_registry.h>
 
namespace fennec
{
 
class display_server;
 
class display_server : public type_registry<display_server, platform*> {
// Typedefs/Constants/Enums ============================================================================================
public:
 
enum feature_ : uint32_t {
        feature_subwindows = 0,
        feature_icon,
 
        feature_window_drag,
 
        feature_mouse,
        feature_cursors,
        feature_custom_cursors,
 
        feature_clipboard,
        feature_clipboard_primary,
        feature_virtual_keyboard,
 
        feature_status_indicators,
        feature_dialogues,
        feature_input_dialogues,
        feature_file_dialogues,
        feature_filtered_file_dialogues,
 
        feature_orientation,
        feature_hidpi,
        feature_hdr,
        feature_swap_buffers,
        feature_window_transparency,
 
        feature_screen_reader,
        feature_text_to_speech,
        feature_touchscreen,
        feature_system_theme,
 
        feature_count,
    };
 
    using featureset_t = bitfield<feature_count>;
    using window_id    = uint32_t;
    using window_pool  = object_pool<unique_ptr<window>>;
 
 
// Public Members ======================================================================================================
    platform* const platform;
 
    explicit display_server(fennec::platform* p)
        : platform(p) {
    }
 
    virtual ~display_server() {
    }
 
 
    bool has_feature(uint32_t feature) const {
        return features.test(feature);
    }
 
    virtual window* create_window(const window::config&, window* = nullptr) = 0;
 
    virtual void connect()         = 0;
    virtual void disconnect()      = 0;
    virtual bool connected() const = 0;
 
    virtual void dispatch() = 0;
 
    virtual void* get_native_handle() = 0;
 
    gfxcontext* get_gfx_context() {
        return gfx_context.get();
    }
 
protected:
    featureset_t           features;
    unique_ptr<gfxcontext> gfx_context;
 
    FENNEC_RTTI_CLASS_ENABLE() {
    }
};
 
template<typename DisplayT, typename WindowT>
class display_server_base : public display_server, public type_registry<gfxcontext, DisplayT*> {
public:
    display_server_base(fennec::platform* p)
        : display_server(p) {
    }
 
    using ctx_registry = type_registry<gfxcontext, DisplayT*>;
    using window_t     = WindowT;
};
 
}
 
#endif // FENNEC_PLATFORM_INTERFACE_DISPLAY_SERVER_H