Add flag to disable seperable shaders for osx Intel GPUs. Default is false

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -43,6 +43,10 @@ static bool IsVendorAmd() {
     std::string gpu_vendor{reinterpret_cast<char const*>(glGetString(GL_VENDOR))};
     return gpu_vendor == "ATI Technologies Inc." || gpu_vendor == "Advanced Micro Devices, Inc.";
 }
+static bool IsVendorIntel() {
+    std::string gpu_vendor{reinterpret_cast<char const*>(glGetString(GL_VENDOR))};
+    return gpu_vendor == "Intel Inc.";
+}
 
 RasterizerOpenGL::RasterizerOpenGL(Frontend::EmuWindow& window)
     : is_amd(IsVendorAmd()), shader_dirty(true),
@@ -161,8 +165,19 @@ RasterizerOpenGL::RasterizerOpenGL(Frontend::EmuWindow& window)
     state.Apply();
     glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, index_buffer.GetHandle());
 
+#ifdef __APPLE__
+    if (IsVendorIntel()) {
+        shader_program_manager = std::make_unique<ShaderProgramManager>(
+            VideoCore::g_seperable_shader_enabled ? GLAD_GL_ARB_separate_shader_objects : false,
+            is_amd);
+    } else {
+        shader_program_manager =
+            std::make_unique<ShaderProgramManager>(GLAD_GL_ARB_separate_shader_objects, is_amd);
+    }
+#else
     shader_program_manager =
         std::make_unique<ShaderProgramManager>(GLAD_GL_ARB_separate_shader_objects, is_amd);
+#endif
 
     glEnable(GL_BLEND);
 

src/video_core/video_core.cpp

@@ -23,6 +23,7 @@ std::unique_ptr<RendererBase> g_renderer; ///< Renderer plugin
 std::atomic<bool> g_hw_renderer_enabled;
 std::atomic<bool> g_shader_jit_enabled;
 std::atomic<bool> g_hw_shader_enabled;
+std::atomic<bool> g_seperable_shader_enabled;
 std::atomic<bool> g_hw_shader_accurate_mul;
 std::atomic<bool> g_use_disk_shader_cache;
 std::atomic<bool> g_renderer_bg_color_update_requested;

src/video_core/video_core.h

@@ -31,6 +31,7 @@ extern std::unique_ptr<RendererBase> g_renderer; ///< Renderer plugin
 extern std::atomic<bool> g_hw_renderer_enabled;
 extern std::atomic<bool> g_shader_jit_enabled;
 extern std::atomic<bool> g_hw_shader_enabled;
+extern std::atomic<bool> g_seperable_shader_enabled;
 extern std::atomic<bool> g_hw_shader_accurate_mul;
 extern std::atomic<bool> g_use_disk_shader_cache;
 extern std::atomic<bool> g_renderer_bg_color_update_requested;