From 2094e8fb2f2d76b0f473e95a74f8258eedf8fdc1 Mon Sep 17 00:00:00 2001
From: Themaister <maister@archlinux.us>
Date: Thu, 5 Jun 2014 15:17:29 +0200
Subject: [PATCH] Auto-enable some extensions if GLES3.

---
 gfx/gl.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/gfx/gl.c b/gfx/gl.c
index ba54a3eb3b..8be87c786e 100644
--- a/gfx/gl.c
+++ b/gfx/gl.c
@@ -1858,14 +1858,26 @@ static bool resolve_extensions(gl_t *gl)
                  "32-bit path will require conversion.\n");
    }
 
-   gl->support_unpack_row_length = false;
-   if (gl_query_extension(gl, "GL_EXT_unpack_subimage"))
+   bool gles3 = false;
+   const char *version = (const char*)glGetString(GL_VERSION);
+   unsigned gles_major = 0, gles_minor = 0;
+   // This format is mandated by GLES.
+   if (version && sscanf(version, "OpenGL ES %u.%u", &gles_major, &gles_minor) == 2 && gles_major >= 3)
+   {
+      RARCH_LOG("[GL]: GLES3 or newer detected. Auto-enabling some extensions.\n");
+      gles3 = true;
+   }
+
+   // GLES3 has unpack_subimage and sRGB in core.
+
+   gl->support_unpack_row_length = gles3;
+   if (!gles3 && gl_query_extension(gl, "GL_EXT_unpack_subimage"))
    {
       RARCH_LOG("[GL]: Extension GL_EXT_unpack_subimage, can copy textures faster using UNPACK_ROW_LENGTH.\n");
       gl->support_unpack_row_length = true;
    }
    // No extensions for float FBO currently.
-   gl->has_srgb_fbo = gl_query_extension(gl, "EXT_sRGB");
+   gl->has_srgb_fbo = gles3 || gl_query_extension(gl, "EXT_sRGB");
 #else
 #ifdef HAVE_FBO
    // Float FBO is core in 3.2.