From 54b2376adad98d91d32378efc3f241f120ba970f Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sun, 10 Oct 2021 13:56:10 +0200
Subject: Draw every frame instead of x11 expose, enable vsync (if available)

---
 src/gl.c | 34 ++++++++++++++++++++++++++--------
 1 file changed, 26 insertions(+), 8 deletions(-)

(limited to 'src/gl.c')

diff --git a/src/gl.c b/src/gl.c
index c83ab49..023ffbb 100644
--- a/src/gl.c
+++ b/src/gl.c
@@ -1,6 +1,6 @@
 #include "../include/mgl/gl.h"
 #include <dlfcn.h>
-/*#include <GL/gl.h>*/
+/*#include <GL/glx.h>*/
 #include <stdio.h>
 
 typedef struct {
@@ -20,28 +20,46 @@ static void* dlsym_print_fail(void *handle, const char *name) {
 }
 
 int mgl_gl_load(mgl_gl *self) {
-    const char *gl_path = "/usr/lib/libOpenGL.so.0";
-    self->handle = dlopen(gl_path, RTLD_LAZY);
+    const char *glx_path = "/usr/lib/libGL.so.1";
+    self->handle = dlopen(glx_path, RTLD_LAZY);
     if(!self->handle) {
-        fprintf(stderr, "dlopen(\"%s\", RTLD_LAZY) failed\n", gl_path);
+        fprintf(stderr, "dlopen(\"%s\", RTLD_LAZY) failed\n", glx_path);
         return -1;
     }
 
-    const dlsym_assign assign[] = {
+    const dlsym_assign required_dlsym[] = {
+        { &self->glXChooseVisual, "glXChooseVisual" },
+        { &self->glXCreateContext, "glXCreateContext" },
+        { &self->glXDestroyContext, "glXDestroyContext" },
+        { &self->glXMakeCurrent, "glXMakeCurrent" },
+        { &self->glXSwapBuffers, "glXSwapBuffers" },
+
         { &self->glViewport, "glViewport" },
         { &self->glClearColor, "glClearColor" },
         { &self->glClear, "glClear" },
+
         { NULL, NULL }
     };
 
-    for(int i = 0; assign[i].func; ++i) {
-        *assign[i].func = dlsym_print_fail(self->handle, assign[i].name);
-        if(!assign[i].func) {
+    for(int i = 0; required_dlsym[i].func; ++i) {
+        *required_dlsym[i].func = dlsym_print_fail(self->handle, required_dlsym[i].name);
+        if(!required_dlsym[i].func) {
             mgl_gl_unload(self);
             return -1;
         }
     }
 
+    const dlsym_assign optional_dlsym[] = {
+        { &self->glXSwapIntervalEXT, "glXSwapIntervalEXT" },
+        { &self->glXSwapIntervalMESA, "glXGetSwapIntervalMESA" },
+        { &self->glXSwapIntervalSGI, "glXSwapIntervalSGI" },
+        { NULL, NULL }
+    };
+
+    for(int i = 0; optional_dlsym[i].func; ++i) {
+        *optional_dlsym[i].func = dlsym_print_fail(self->handle, optional_dlsym[i].name);
+    }
+
     return 0;
 }
 
-- 
cgit v1.2.3