From 6ff6dabfb32d99772c8d36f49a9b70beb4864803 Mon Sep 17 00:00:00 2001
From: John Sebastian Peterson <jpeterson57@gmail.com>
Date: Mon, 10 Feb 2025 02:55:08 +1100
Subject: [PATCH] add epoxy_set_library_path for android angle

this is used in termux to load angle platform for a lack of other ideas

I don't know how to use lib glvnd to load angle  this didn't work only the LD library path worked

$PREFIX/share/glvnd/egl_vendor.d/angle.json
"library_path" : "libEGL_angle.so"
or this failed too
"library_path" : "libGLESv2_angle.so"

this works
LD_LIBRARY_PATH=$P/opt/angle-android/gl/ ~/demos/out/src/egl/opengl/eglinfo -p angle  -B

one horrible bug this introduced in virgl renderer is a glx failure if
epoxy support glx. I am looking for a solution for this an a better
approach overall

glXGetCurrentContext() not found: undefined symbol: glXGetCurrentContext
---
 include/epoxy/common.h |  3 +++
 src/dispatch_common.c  | 16 ++++++++++++----
 src/gen_dispatch.py    |  2 +-
 3 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/include/epoxy/common.h b/include/epoxy/common.h
index cf58ab2f..f7dd5de7 100644
--- a/include/epoxy/common.h
+++ b/include/epoxy/common.h
@@ -57,6 +57,9 @@ EPOXY_BEGIN_DECLS
 
 EPOXY_PUBLIC bool epoxy_extension_in_string(const char *extension_list,
                                             const char *ext);
+#if defined(__ANDROID__)
+EPOXY_PUBLIC void epoxy_set_library_path(const char * path, const char * suffix);
+#endif
 
 EPOXY_END_DECLS
 
diff --git a/src/dispatch_common.c b/src/dispatch_common.c
index 9f3dac46..58b45af4 100644
--- a/src/dispatch_common.c
+++ b/src/dispatch_common.c
@@ -179,10 +179,18 @@
 #define GLES1_LIB "libGLESv1_CM.so"
 #define GLES2_LIB "libGLESv2.so"
 #elif defined(__ANDROID__)
-#define GLX_LIB "libGLESv2.so"
-#define EGL_LIB "libEGL.so"
-#define GLES1_LIB "libGLESv1_CM.so"
-#define GLES2_LIB "libGLESv2.so"
+#define GLX_LIB GLES2_LIB
+static char EGL_LIB[PATH_MAX] = "libEGL.so";
+static char GLES1_LIB[PATH_MAX] = "libGLESv1_CM.so";
+static char GLES2_LIB[PATH_MAX] = "libGLESv2.so";
+/* example for angle-gl platform */ 
+/* epoxy_set_library_path("opt/angle-android/gl", "_angle); */
+EPOXY_PUBLIC void epoxy_set_library_path(const char * path, const char * suffix) {
+    char *prefix = getenv("PREFIX");
+    sprintf(EGL_LIB, "%s/%s/libEGL%s.so", prefix, path, suffix);
+    sprintf(GLES1_LIB, "%s/%s/libGLESv1_CM%s.so", prefix, path, suffix);
+    sprintf(GLES2_LIB, "%s/%s/libGLESv2%s.so", prefix, path, suffix);
+}
 #elif defined(_WIN32)
 #define EGL_LIB "libEGL.dll"
 #define GLES1_LIB "libGLES_CM.dll"
diff --git a/src/gen_dispatch.py b/src/gen_dispatch.py
index 3daad842..728db11f 100755
--- a/src/gen_dispatch.py
+++ b/src/gen_dispatch.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/bin/env python3
 # -*- coding: utf-8 -*-
 
 # Copyright © 2013 Intel Corporation