Add SDL_Window to initGraphicsContext prototype

This value is needed for vulkan to properly allocate a surface, and would benefit OpenGL to move more of its initialization code into here rather than in `emulator.cpp`.

include/renderer.hpp

@@ -16,6 +16,7 @@ enum class RendererType : s8 {
 };
 
 class GPU;
+class SDL_Window;
 
 class Renderer {
   protected:
@@ -42,7 +43,7 @@ class Renderer {
 
 	virtual void reset() = 0;
 	virtual void display() = 0;                                                              // Display the 3DS screen contents to the window
-	virtual void initGraphicsContext() = 0;                                                  // Initialize graphics context
+	virtual void initGraphicsContext(SDL_Window* window) = 0;                                // Initialize graphics context
 	virtual void clearBuffer(u32 startAddress, u32 endAddress, u32 value, u32 control) = 0;  // Clear a GPU buffer in VRAM
 	virtual void displayTransfer(u32 inputAddr, u32 outputAddr, u32 inputSize, u32 outputSize, u32 flags) = 0;  // Perform display transfer
 	virtual void drawVertices(PICA::PrimType primType, std::span<const PICA::Vertex> vertices) = 0;             // Draw the given vertices