gpu: fix OpenGL context creation and shader patching on macOS Catalina.

src/application/sdl-app.cpp

@@ -56,6 +56,9 @@ sdl::app_display::app_display(char const *title, ivec2 res)
     // Ask for GL 3.2 at least
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
+#if __APPLE__
+    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
+#endif
 
 #if LOL_BUILD_DEBUG
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_DEBUG_FLAG);

src/gpu/shader.cpp

@@ -653,6 +653,10 @@ std::string ShaderData::Patch(std::string const &code, ShaderType type)
         /* Perform small replaces */
         char const * const fast_replaces[] =
         {
+#if __APPLE__
+            "#version 130", "#version 150",
+            "texture2D", "texture",
+#else
             "#version 130", "#version 120",
             "out vec4 out_color;", " ",
             "out_color =", "gl_FragColor =",
@@ -664,6 +668,7 @@ std::string ShaderData::Patch(std::string const &code, ShaderType type)
             "out vec3", "varying vec3",
             "out vec4", "varying vec4",
             "out mat4", "varying mat4",
+#endif
             nullptr
         };