Removed restrictions preventing sRGB and non-sRGB canvases from being used together when doing multi-canvas rendering.

src/modules/graphics/opengl/OpenGL.h

@@ -238,6 +238,16 @@ public:
 	 **/
 	float getPointSize() const;
 
+	/**
+	 * Calls glEnable/glDisable(GL_FRAMEBUFFER_SRGB).
+	 **/
+	void setFramebufferSRGB(bool enable);
+
+	/**
+	 * Equivalent to glIsEnabled(GL_FRAMEBUFFER_SRGB).
+	 **/
+	bool hasFramebufferSRGB() const;
+
 	/**
 	 * Binds a Framebuffer Object to the specified target.
 	 **/
@@ -360,6 +370,8 @@ private:
 
 		float pointSize;
 
+		bool framebufferSRGBEnabled;
+
 		GLuint defaultTexture;
 
 		Matrix lastProjectionMatrix;