From e8b1320f91838a29891c6a5b377160e27a0adcf5 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sun, 4 Aug 2024 20:27:26 +0200
Subject: Add option to choose render api (glx or egl) in window creation

---
 include/mgl/gl.h            | 37 +++++++++++++++++++++++++++++++++----
 include/mgl/gl_macro.h      | 13 +++++++++++++
 include/mgl/window/window.h |  6 ++++++
 3 files changed, 52 insertions(+), 4 deletions(-)

(limited to 'include')

diff --git a/include/mgl/gl.h b/include/mgl/gl.h
index c96beea..397d608 100644
--- a/include/mgl/gl.h
+++ b/include/mgl/gl.h
@@ -10,10 +10,25 @@ typedef struct _XDisplay Display;
 typedef struct __GLXcontextRec *GLXContext;
 typedef unsigned long GLXDrawable;
 typedef struct __GLXFBConfigRec *GLXFBConfig;
+typedef void(*__GLXextFuncPtr)(void);
+
+typedef void (*FUNC_glXSwapIntervalEXT)(Display * dpy, GLXDrawable drawable, int interval);
+typedef int (*FUNC_glXSwapIntervalMESA)(unsigned int interval);
+typedef int (*FUNC_glXSwapIntervalSGI)(int interval);
+
+typedef void* EGLDisplay;
+typedef void* EGLNativeDisplayType;
+typedef uintptr_t EGLNativeWindowType;
+typedef void* EGLConfig;
+typedef void* EGLSurface;
+typedef void* EGLContext;
 
 typedef struct {
-    void *handle;
+    void *gl_library;
+    void *glx_library;
+    void *egl_library;
 
+    __GLXextFuncPtr (*glXGetProcAddress)(const unsigned char *procName);
     GLXContext (*glXCreateNewContext)(Display *dpy, GLXFBConfig config, int renderType, GLXContext shareList, int direct);
     int (*glXMakeContextCurrent)(Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
     void (*glXDestroyContext)(Display *dpy, GLXContext ctx);
@@ -21,6 +36,20 @@ typedef struct {
     GLXFBConfig* (*glXChooseFBConfig)(Display *dpy, int screen, const int *attribList, int *nitems);
     _XVisualInfo* (*glXGetVisualFromFBConfig)(Display *dpy, GLXFBConfig config);
 
+    EGLDisplay (*eglGetDisplay)(EGLNativeDisplayType display_id);
+    unsigned int (*eglInitialize)(EGLDisplay dpy, int32_t *major, int32_t *minor);
+    unsigned int (*eglTerminate)(EGLDisplay dpy);
+    unsigned int (*eglChooseConfig)(EGLDisplay dpy, const int32_t *attrib_list, EGLConfig *configs, int32_t config_size, int32_t *num_config);
+    EGLSurface (*eglCreateWindowSurface)(EGLDisplay dpy, EGLConfig config, EGLNativeWindowType win, const int32_t *attrib_list);
+    EGLContext (*eglCreateContext)(EGLDisplay dpy, EGLConfig config, EGLContext share_context, const int32_t *attrib_list);
+    unsigned int (*eglMakeCurrent)(EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx);
+    unsigned int (*eglDestroyContext)(EGLDisplay dpy, EGLContext ctx);
+    unsigned int (*eglDestroySurface)(EGLDisplay dpy, EGLSurface surface);
+    unsigned int (*eglSwapInterval)(EGLDisplay dpy, int32_t interval);
+    unsigned int (*eglSwapBuffers)(EGLDisplay dpy, EGLSurface surface);
+    unsigned int (*eglBindAPI)(unsigned int api);
+    unsigned int (*eglGetConfigAttrib)(EGLDisplay dpy, EGLConfig config, int32_t attribute, int32_t *value);
+
     void (*glViewport)(int x, int y, int width, int height);
     void (*glScissor)(int x, int y, int width, int height);
     void (*glClearColor)(float red, float green, float blue, float alpha);
@@ -82,9 +111,9 @@ typedef struct {
     void (*glFinish)(void);
 
     /* Optional*/
-    void (*glXSwapIntervalEXT)(Display * dpy, GLXDrawable drawable, int interval);
-    int (*glXSwapIntervalMESA)(unsigned int interval);
-    int (*glXSwapIntervalSGI)(int interval);
+    FUNC_glXSwapIntervalEXT glXSwapIntervalEXT;
+    FUNC_glXSwapIntervalMESA glXSwapIntervalMESA;
+    FUNC_glXSwapIntervalSGI glXSwapIntervalSGI;
     void (*glGenerateMipmap)(unsigned int target);
 } mgl_gl;
 
diff --git a/include/mgl/gl_macro.h b/include/mgl/gl_macro.h
index ba2d3f1..bfeffce 100644
--- a/include/mgl/gl_macro.h
+++ b/include/mgl/gl_macro.h
@@ -91,4 +91,17 @@
 
 #define GL_SCISSOR_TEST 0x0C11
 
+#define EGL_SUCCESS                             0x3000
+#define EGL_BUFFER_SIZE                         0x3020
+#define EGL_RED_SIZE                            0x3024
+#define EGL_GREEN_SIZE                          0x3023
+#define EGL_BLUE_SIZE                           0x3022
+#define EGL_ALPHA_SIZE                          0x3021
+#define EGL_RENDERABLE_TYPE                     0x3040
+#define EGL_OPENGL_API                          0x30A2
+#define EGL_OPENGL_BIT                          0x0008
+#define EGL_NONE                                0x3038
+#define EGL_CONTEXT_CLIENT_VERSION              0x3098
+#define EGL_NATIVE_VISUAL_ID                    0x302E
+
 #endif /* MGL_GL_MACRO_H */
diff --git a/include/mgl/window/window.h b/include/mgl/window/window.h
index fdffd8d..7370df9 100644
--- a/include/mgl/window/window.h
+++ b/include/mgl/window/window.h
@@ -66,6 +66,11 @@ typedef enum {
     MGL_WINDOW_TYPE_NOTIFICATION  /* Also sets the window as always on top */
 } mgl_window_type;
 
+typedef enum {
+    MGL_RENDER_API_GLX,
+    MGL_RENDER_API_EGL
+} mgl_render_api;
+
 /* TODO: Some of these parameters only apply to new window */
 typedef struct {
     mgl_vec2i position;
@@ -81,6 +86,7 @@ typedef struct {
     const char *class_name;
     mgl_window_type window_type;             /* default: normal */
     mgl_window_handle transient_for_window;
+    mgl_render_api render_api;               /* default: MGL_RENDER_API_GLX */
 } mgl_window_create_params;
 
 typedef enum {
-- 
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