From 5526a1d9055e131f711c2bfae3d4a14a6180bdb8 Mon Sep 17 00:00:00 2001
From: BearOso <bearoso@gmail.com>
Date: Thu, 1 Jun 2023 18:01:08 -0500
Subject: [PATCH] Add missing files.

---
 frontend-common/opengl_context.hpp      | 30 ++++++++++++++++
 frontend-common/wayland_egl_context.hpp | 41 +++++++++++++++++++++
 frontend-common/wayland_surface.hpp     | 48 +++++++++++++++++++++++++
 3 files changed, 119 insertions(+)
 create mode 100644 frontend-common/opengl_context.hpp
 create mode 100644 frontend-common/wayland_egl_context.hpp
 create mode 100644 frontend-common/wayland_surface.hpp

diff --git a/frontend-common/opengl_context.hpp b/frontend-common/opengl_context.hpp
new file mode 100644
index 00000000..62b1c10e
--- /dev/null
+++ b/frontend-common/opengl_context.hpp
@@ -0,0 +1,30 @@
+/*****************************************************************************\
+     Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
+                This file is licensed under the Snes9x License.
+   For further information, consult the LICENSE file in the root directory.
+\*****************************************************************************/
+
+#ifndef __GTK_OPENGL_CONTEXT_H
+#define __GTK_OPENGL_CONTEXT_H
+
+class OpenGLContext
+{
+  public:
+    virtual ~OpenGLContext(){};
+    virtual bool create_context() = 0;
+    virtual void resize() = 0;
+    virtual void swap_buffers() = 0;
+    virtual void swap_interval(int frames) = 0;
+    virtual void make_current() = 0;
+    virtual bool ready()
+    {
+        return true;
+    };
+
+    int x;
+    int y;
+    int width;
+    int height;
+};
+
+#endif
diff --git a/frontend-common/wayland_egl_context.hpp b/frontend-common/wayland_egl_context.hpp
new file mode 100644
index 00000000..be91bba5
--- /dev/null
+++ b/frontend-common/wayland_egl_context.hpp
@@ -0,0 +1,41 @@
+/*****************************************************************************\
+     Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
+                This file is licensed under the Snes9x License.
+   For further information, consult the LICENSE file in the root directory.
+\*****************************************************************************/
+
+#ifndef __WAYLAND_EGL_CONTEXT_H
+#define __WAYLAND_EGL_CONTEXT_H
+
+#include "opengl_context.hpp"
+#include "wayland_surface.hpp"
+
+#include "../external/glad/include/glad/egl.h"
+#include <memory>
+#include <wayland-egl.h>
+
+class WaylandEGLContext : public OpenGLContext
+{
+  public:
+    WaylandEGLContext();
+    ~WaylandEGLContext();
+    bool attach(wl_display *display, wl_surface *surface, WaylandSurface::Metrics m);
+    bool create_context();
+    void resize() {};
+    void resize(WaylandSurface::Metrics m);
+    void swap_buffers();
+    void swap_interval(int frames);
+    void make_current();
+    bool ready();
+
+    EGLDisplay egl_display;
+    EGLSurface egl_surface;
+    EGLContext egl_context;
+    EGLConfig egl_config;
+
+    wl_egl_window *egl_window;
+
+    std::unique_ptr<WaylandSurface> wayland_surface;
+};
+
+#endif
diff --git a/frontend-common/wayland_surface.hpp b/frontend-common/wayland_surface.hpp
new file mode 100644
index 00000000..647ceb7e
--- /dev/null
+++ b/frontend-common/wayland_surface.hpp
@@ -0,0 +1,48 @@
+/*****************************************************************************\
+     Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
+                This file is licensed under the Snes9x License.
+   For further information, consult the LICENSE file in the root directory.
+\*****************************************************************************/
+
+#pragma once
+
+#include "viewporter-client-protocol.h"
+#include "fractional-scale-v1.h"
+#include <tuple>
+
+class WaylandSurface
+{
+  public:
+    WaylandSurface();
+    ~WaylandSurface();
+
+    struct Metrics {
+        int x, y, width, height, scale;
+    };
+
+    bool attach(wl_display *display, wl_surface *surface, Metrics source_metrics);
+    void resize(Metrics new_metrics);
+    std::tuple<int, int> get_size();
+
+    struct wl_display *display;
+    struct wl_registry *registry;
+    struct wl_compositor *compositor;
+    struct wl_subcompositor *subcompositor;
+
+    struct wl_surface *parent;
+    struct wl_surface *child;
+    struct wl_subsurface *subsurface;
+    struct wl_region *region;
+
+    Metrics metrics;
+    double actual_scale;
+
+    struct zwp_idle_inhibit_manager_v1 *idle_inhibit_manager;
+    struct zwp_idle_inhibitor_v1 *idle_inhibitor;
+
+    struct wp_viewporter *viewporter;
+    struct wp_viewport *viewport;
+
+    struct wp_fractional_scale_manager_v1 *fractional_scale_manager;
+    struct wp_fractional_scale_v1 *fractional_scale;
+};