- invalidate the render state after finishing a frame.

Last bound textures in particular may not be valid anymore in the next frame in movie playback.

source/common/rendering/gl/system/gl_framebuffer.cpp

@@ -465,5 +465,6 @@ void videoShowFrame(int32_t w)
     }
 	twodpsp.Clear();
 	twodgen.Clear();
+	GLInterface.ResetFrame();
 }
 

source/glbackend/glbackend.cpp

@@ -204,6 +204,14 @@ FHardwareTexture* GLInstance::NewTexture()
 	return new FHardwareTexture;
 }
 
+void GLInstance::ResetFrame()
+{
+	GLState s;
+	lastState = s; // Back to defaults.
+	lastState.Style.BlendOp = -1;	// invalidate. This forces a reset for the next operation
+
+}
+
 	
 std::pair<size_t, BaseVertex *> GLInstance::AllocVertices(size_t num)
 {

source/glbackend/glbackend.h

@@ -215,6 +215,7 @@ public:
 	void LoadVPXShader();
 	void Draw2D(F2DDrawer* drawer);
 	void DrawImGui(ImDrawData*);
+	void ResetFrame();
 
 	void Deinit();