Don't keep the dummy renderer alive for EGLRenderer's lifetime

At best, it doesn't do anything other than some queue some viewport
changes via SDL_RendererEventWatch(). At worst, it can race with
the render thread and cause trouble.

app/streaming/video/ffmpeg-renderers/eglvid.cpp

@@ -75,8 +75,7 @@ EGLRenderer::EGLRenderer(IFFmpegRenderer *backendRenderer)
         m_eglClientWaitSync(nullptr),
         m_GlesMajorVersion(0),
         m_GlesMinorVersion(0),
-        m_HasExtUnpackSubimage(false),
-        m_DummyRenderer(nullptr)
+        m_HasExtUnpackSubimage(false)
 {
     SDL_assert(backendRenderer);
     SDL_assert(backendRenderer->canExportEGL());
@@ -111,10 +110,6 @@ EGLRenderer::~EGLRenderer()
 
         SDL_GL_DeleteContext(m_Context);
     }
-
-    if (m_DummyRenderer) {
-        SDL_DestroyRenderer(m_DummyRenderer);
-    }
 }
 
 bool EGLRenderer::prepareDecoderContext(AVCodecContext*, AVDictionary**)
@@ -446,8 +441,13 @@ bool EGLRenderer::initialize(PDECODER_PARAMETERS params)
         return false;
     }
 
-    m_DummyRenderer = SDL_CreateRenderer(m_Window, renderIndex, SDL_RENDERER_ACCELERATED);
-    if (!m_DummyRenderer) {
+    // This will load OpenGL ES and convert our window to SDL_WINDOW_OPENGL if necessary
+    SDL_Renderer* dummyRenderer = SDL_CreateRenderer(m_Window, renderIndex, SDL_RENDERER_ACCELERATED);
+    if (dummyRenderer) {
+        SDL_DestroyRenderer(dummyRenderer);
+        dummyRenderer = nullptr;
+    }
+    else {
         // Print the error here (before it gets clobbered), but ensure that we flush window
         // events just in case SDL re-created the window before eventually failing.
         EGL_LOG(Error, "SDL_CreateRenderer() failed: %s", SDL_GetError());
@@ -470,12 +470,6 @@ bool EGLRenderer::initialize(PDECODER_PARAMETERS params)
         SDL_FlushEvent(SDL_WINDOWEVENT);
     }
 
-    // Now we finally bail if we failed during SDL_CreateRenderer() above.
-    if (!m_DummyRenderer) {
-        m_InitFailureReason = InitFailureReason::NoSoftwareSupport;
-        return false;
-    }
-
     SDL_SysWMinfo info;
     SDL_VERSION(&info.version);
     if (!SDL_GetWindowWMInfo(params->window, &info)) {

app/streaming/video/ffmpeg-renderers/eglvid.h

@@ -68,6 +68,4 @@ private:
 
 #define OVERLAY_PARAM_TEXTURE 0
     int m_OverlayShaderProgramParams[1];
-
-    SDL_Renderer *m_DummyRenderer;
 };