Unfinished Wayland PR (#1)

moved from the github repo.

current progress:

<img width="389" alt="image.png" src="attachments/6a2cb365-7348-44b4-8fa7-9980df965a67">

Other notes:

- took the opportunity to remove MwLLSetBackground which I was told was deprecated
- Updated .gitignore to more accurately cover/remove example binaries
- Uses OpenGL as the backend.
- New LL function for swapping buffers, MwLLEndDraw
- [TODO] Uses weak linking for all libraries so that systems that don't support Wayland or even have it installed can launch without it.

Reviewed-on: https://gitea.nishi.boats/pyrite-dev/milsko/pulls/1
Co-authored-by: IoIxD <alphaproject217@gmail.com>
Co-committed-by: IoIxD <alphaproject217@gmail.com>

include/Mw/BaseTypes.h

@@ -58,8 +58,8 @@ typedef unsigned long MwU64;
 #ifdef OTHER_TYPES_DEFINED
 #undef OTHER_TYPES_DEFINED
 #else
-typedef int	     MwI32;
-typedef unsigned int MwU32;
+typedef int		   MwI32;
+typedef unsigned int	   MwU32;
 
 typedef short	       MwI16;
 typedef unsigned short MwU16;

include/Mw/LowLevel.h

@@ -25,7 +25,8 @@ typedef void* MwLLPixmap;
 
 enum MwLLBackends {
 	MwLLBackendX11 = 0,
-	MwLLBackendGDI
+	MwLLBackendGDI,
+	MwLLBackendWayland,
 };
 
 struct _MwLLCommon {
@@ -55,6 +56,9 @@ struct _MwLLCommonPixmap {
 #ifdef USE_GDI
 #include <Mw/LowLevel/GDI.h>
 #endif
+#ifdef USE_WAYLAND
+#include <Mw/LowLevel/Wayland.h>
+#endif
 
 union _MwLL {
 	struct _MwLLCommon common;
@@ -64,6 +68,9 @@ union _MwLL {
 #ifdef USE_GDI
 	struct _MwLLGDI gdi;
 #endif
+#ifdef USE_WAYLAND
+	struct _MwLLWayland wayland;
+#endif
 };
 
 union _MwLLColor {
@@ -74,6 +81,9 @@ union _MwLLColor {
 #ifdef USE_GDI
 	struct _MwLLGDIColor gdi;
 #endif
+#ifdef USE_WAYLAND
+	struct _MwLLWaylandColor wayland;
+#endif
 };
 
 union _MwLLPixmap {
@@ -84,6 +94,9 @@ union _MwLLPixmap {
 #ifdef USE_GDI
 	struct _MwLLGDIPixmap gdi;
 #endif
+#ifdef USE_WAYLAND
+	struct _MwLLWaylandPixmap wayland;
+#endif
 };
 #endif
 #include <Mw/TypeDefs.h>
@@ -149,6 +162,8 @@ MWDECL void (*MwLLDestroy)(MwLL handle);
 
 MWDECL void (*MwLLPolygon)(MwLL handle, MwPoint* points, int points_count, MwLLColor color);
 MWDECL void (*MwLLLine)(MwLL handle, MwPoint* points, MwLLColor color);
+MWDECL void (*MwLLBeginDraw)(MwLL handle);
+MWDECL void (*MwLLEndDraw)(MwLL handle);
 
 MWDECL MwLLColor (*MwLLAllocColor)(MwLL handle, int r, int g, int b);
 MWDECL void (*MwLLColorUpdate)(MwLL handle, MwLLColor c, int r, int g, int b);

include/Mw/LowLevel/Wayland.h

@@ -0,0 +1,121 @@
+/*!
+ * @file Mw/LowLevel/Wayland.h
+ * @brief Work in progress Wayland Backend
+ * @warning This is used internally.
+ * @warning This is disabled by default.
+ */
+#ifndef __MW_LOWLEVEL_WAYLAND_H__
+#define __MW_LOWLEVEL_WAYLAND_H__
+
+#include <Mw/MachDep.h>
+#include <Mw/TypeDefs.h>
+#include <Mw/LowLevel.h>
+
+#include <wayland-client-protocol.h>
+#include <wayland-egl.h>
+#include <EGL/egl.h>
+#include <GL/gl.h>
+#include <GL/glext.h>
+
+#include <wayland-client.h>
+#include <xkbcommon/xkbcommon.h>
+
+MWDECL int MwLLWaylandCallInit(void);
+
+#ifndef WL_PROTOCOLS_DEFINED
+#define WL_PROTOCOLS_DEFINED
+#include "Wayland/xdg-shell-client-protocol.h"
+#include "Wayland/xdg-decoration-client-protocol.h"
+#include "Wayland/cursor-shape-client-protocol.h"
+#endif
+
+struct _MwLLWayland;
+
+typedef struct wayland_protocol {
+	void* listener;
+	void* context;
+} wayland_protocol_t;
+
+typedef wayland_protocol_t*(wl_setup_func)(MwU32, struct _MwLLWayland*);
+
+struct _MwLLWaylandTopLevel {
+	struct xdg_surface*	     xdg_surface;
+	struct xdg_toplevel*	     xdg_top_level;
+	struct xdg_toplevel_listener xdg_toplevel_listener;
+	struct xdg_surface_listener  xdg_surface_listener;
+
+	struct xkb_context* xkb_context;
+	struct xkb_keymap*  xkb_keymap;
+	struct xkb_state*   xkb_state;
+
+	MwBool compositor_created;
+	MwBool xdg_wm_base_created;
+	MwBool xdg_surface_created;
+};
+
+struct _MwLLWayland {
+	struct _MwLLCommon common;
+
+	/* Pointer for data that's only loaded if the widget is a toplevel */
+	struct _MwLLWaylandTopLevel* toplevel;
+
+	enum {
+		MWLL_WAYLAND_TOPLEVEL = 0,
+		MWLL_WAYLAND_SUBLEVEL = 1, /* Sublevels are surfaces that have the toplevel as a parent. They could be implemented as subsurfaces if we ever switch away from OpenGL. Some parts of the code also call them subwidgets. */
+	} type;
+
+	/* Map of Wayland interfaces to their relevant setup functions. */
+	struct {
+		const char*    key;
+		wl_setup_func* value;
+	}* wl_protocol_setup_map;
+
+	/* Map of Wayland interfaces to any information we keep about them once we've registered them. */
+	struct {
+		const char*	    key;
+		wayland_protocol_t* value;
+	}* wl_protocol_map;
+
+	struct wl_display*	    display;
+	struct wl_registry*	    registry;
+	struct wl_compositor*	    compositor;
+	struct wl_subcompositor*    subcompositor;
+	struct wl_surface*	    surface;
+	struct wl_registry_listener registry_listener;
+	struct wl_event_queue*	    event_queue;
+
+	EGLNativeWindowType egl_window_native;
+	EGLDisplay	    egl_display;
+	EGLContext	    egl_context;
+	EGLSurface	    egl_surface;
+	EGLConfig	    egl_config;
+
+	MwLL*  sublevels;  /* stb_ds managed array of any sublevels */
+	MwBool configured; /* Whether or not xdg_toplevel_configure has run once */
+	MwBool egl_setup;  /* Whether or not EGL has been set up */
+	MwBool has_set_xy /* Whether or not MwSetXY has been called */;
+
+	int	resize_counter; /* Counter that's for a hack in event_loop */
+	MwU32	x, y, ww, wh;	/* Window position */
+	MwU32	lw, lh;		/* Last known window position */
+	MwPoint cur_mouse_pos;	/* Currently known mouse position */
+
+	struct timeval timer;
+	MwU64	       cooldown_timer;
+	MwU64	       cooldown_timer_epoch;
+
+	MwLL parent;
+	MwLL topmost_parent; /* The parent at the top of all the other parents. Usually a toplevel. */
+};
+
+struct _MwLLWaylandColor {
+	struct _MwLLCommonColor common;
+};
+
+struct _MwLLWaylandPixmap {
+	struct _MwLLCommonPixmap common;
+	GLuint			 texture;
+	MwBool			 texture_deleted;
+};
+
+#endif

include/Mw/LowLevel/Wayland/.gitignore

@@ -0,0 +1 @@
+*protocol.h

include/Mw/LowLevel/Wayland/README.md

@@ -0,0 +1 @@
+Folder for wayland-scanner to place any of its files.

include/Mw/MachDep.h

@@ -13,6 +13,7 @@
 #include <sys/types.h>
 #include <assert.h>
 #include <math.h>
+#include <errno.h>
 #include <ctype.h>
 #include <time.h>
 #include <sys/stat.h>
@@ -43,6 +44,7 @@
 #include <dlfcn.h>
 #include <signal.h>
 #include <dirent.h>
+#include <fcntl.h>
 #endif
 
 #ifndef M_PI