Merge pull request #5756 from vitor-k/gl_extensions

Check for OpenGL extensions

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -61,6 +61,11 @@ RasterizerOpenGL::RasterizerOpenGL()
                     "Shadow might not be able to render because of unsupported OpenGL extensions.");
     }
 
+    if (!GLAD_GL_ARB_copy_image) {
+        LOG_WARNING(Render_OpenGL,
+                    "ARB_copy_image not supported. Some games might produce artifacts.");
+    }
+
     // Clipping plane 0 is always enabled for PICA fixed clip plane z <= 0
     state.clip_distance[0] = true;
 
@@ -772,7 +777,7 @@ bool RasterizerOpenGL::Draw(bool accelerate, bool is_indexed) {
     }
 
     OGLTexture temp_tex;
-    if (need_duplicate_texture) {
+    if (need_duplicate_texture && GLAD_GL_ARB_copy_image) {
         // The game is trying to use a surface as a texture and framebuffer at the same time
         // which causes unpredictable behavior on the host.
         // Making a copy to sample from eliminates this issue and seems to be fairly cheap.

src/video_core/renderer_opengl/gl_shader_disk_cache.cpp

@@ -365,6 +365,10 @@ void ShaderDiskCache::SaveDecompiled(u64 unique_identifier,
 void ShaderDiskCache::SaveDump(u64 unique_identifier, GLuint program) {
     if (!IsUsable())
         return;
+    if (!GLAD_GL_ARB_get_program_binary) {
+        LOG_WARNING(Render_OpenGL, "ARB_get_program_binary is not supported. Problems may occur if "
+                                   "use_disk_shader_cache is ON.");
+    }
 
     GLint binary_length{};
     glGetProgramiv(program, GL_PROGRAM_BINARY_LENGTH, &binary_length);