From 2205493862c29cdbd0205f18489eb244e9ec1204 Mon Sep 17 00:00:00 2001
From: Lior Halphon <LIJI32@gmail.com>
Date: Sat, 30 Dec 2017 17:01:23 +0200
Subject: [PATCH] Bug fixes in the SDL port

---
 Core/gb.c    |  3 +--
 SDL/main.c   |  2 +-
 SDL/shader.c | 10 +++++++++-
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/Core/gb.c b/Core/gb.c
index c612231..bf41891 100755
--- a/Core/gb.c
+++ b/Core/gb.c
@@ -5,11 +5,10 @@
 #include <string.h>
 #include <errno.h>
 #include <stdarg.h>
-#include <sys/time.h>
 #ifndef _WIN32
 #include <sys/select.h>
-#endif
 #include <unistd.h>
+#endif
 #include "gb.h"
 
 void GB_attributed_logv(GB_gameboy_t *gb, GB_log_attributes attributes, const char *fmt, va_list args)
diff --git a/SDL/main.c b/SDL/main.c
index 62101c0..7db2df6 100755
--- a/SDL/main.c
+++ b/SDL/main.c
@@ -451,7 +451,7 @@ usage:
     
     SDL_GLContext gl_context = SDL_GL_CreateContext(window);
     
-    GLint major, minor;
+    GLint major = 0, minor = 0;
     glGetIntegerv(GL_MAJOR_VERSION, &major);
     glGetIntegerv(GL_MINOR_VERSION, &minor);
     
diff --git a/SDL/shader.c b/SDL/shader.c
index 7aebc88..a34866e 100644
--- a/SDL/shader.c
+++ b/SDL/shader.c
@@ -64,7 +64,7 @@ static GLuint create_program(const char *vsh, const char *fsh)
 
 bool init_shader_with_name(shader_t *shader, const char *name)
 {
-    GLint major, minor;
+    GLint major = 0, minor = 0;
     glGetIntegerv(GL_MAJOR_VERSION, &major);
     glGetIntegerv(GL_MINOR_VERSION, &minor);
     
@@ -184,6 +184,14 @@ void render_bitmap_with_shader(shader_t *shader, void *bitmap, void *previous,un
 
 void free_shader(shader_t *shader)
 {
+    GLint major = 0, minor = 0;
+    glGetIntegerv(GL_MAJOR_VERSION, &major);
+    glGetIntegerv(GL_MINOR_VERSION, &minor);
+    
+    if (major * 0x100 + minor < 0x302) {
+        return;
+    }
+    
     glDeleteProgram(shader->program);
     glDeleteTextures(1, &shader->texture);
     glDeleteTextures(1, &shader->previous_texture);