From 76438fa098458dc34efb778f39fe6389ac7a59a6 Mon Sep 17 00:00:00 2001
From: LazyBumHorse <CirilCatington@gmail.com>
Date: Mon, 17 Jun 2019 18:26:41 +0200
Subject: [PATCH] workaround for crash due to glcore not always using at least
 OpenGL 3.2

---
 gfx/drivers/gl_core.c                 |  2 +-
 gfx/drivers_shader/shader_gl_core.cpp | 38 ++++++++++++++++++++++-----
 2 files changed, 32 insertions(+), 8 deletions(-)

diff --git a/gfx/drivers/gl_core.c b/gfx/drivers/gl_core.c
index d5ce9299bf..4b42f59971 100644
--- a/gfx/drivers/gl_core.c
+++ b/gfx/drivers/gl_core.c
@@ -1028,7 +1028,7 @@ static void *gl_core_init(const video_info_t *video,
    }
 
    if (!string_is_empty(version))
-      sscanf(version, "%d.%d", &gl->version_major, &gl->version_minor);
+      sscanf(version, "%u.%u", &gl->version_major, &gl->version_minor);
 
    {
       char device_str[128];
diff --git a/gfx/drivers_shader/shader_gl_core.cpp b/gfx/drivers_shader/shader_gl_core.cpp
index 74f4b9d6d1..93e865f58a 100644
--- a/gfx/drivers_shader/shader_gl_core.cpp
+++ b/gfx/drivers_shader/shader_gl_core.cpp
@@ -94,15 +94,39 @@ static uint32_t gl_core_get_cross_compiler_target_version()
 
 #ifdef HAVE_OPENGLES3
    if (!version || sscanf(version, "OpenGL ES %u.%u", &major, &minor) != 2)
-      return 300u;
+      return 300;
+   
+   if (major == 2 && minor == 0)
+      return 100;
 #else
    if (!version || sscanf(version, "%u.%u", &major, &minor) != 2)
-      return 150u;
-#endif
-   if (major == 3u && minor == 2u)
-      return 150u;
+      return 150;
 
-   return 100u * major + 10u * minor;
+   if (major == 3)
+   {
+      switch (minor)
+      {
+         case 2:
+            return 150;
+         case 1:
+            return 140;
+         case 0:
+            return 130;
+      }
+   }
+   else if (major == 2)
+   {
+      switch (minor)
+      {
+         case 1:
+            return 120;
+         case 0:
+            return 110;
+      }
+   }
+#endif
+
+   return 100 * major + 10 * minor;
 }
 
 GLuint gl_core_cross_compile_program(
@@ -719,7 +743,7 @@ void Framebuffer::init()
 
    levels = num_miplevels(size.width, size.height);
    if (max_levels < levels)
-	   levels = max_levels;
+      levels = max_levels;
    if (levels == 0)
       levels = 1;