Remove binding changes from runtime measurement

include/shadertoy/RenderContext.hpp

@@ -240,6 +240,14 @@ public:
 	 */
 	void RenderScreenQuad();
 
+	/**
+	 * @brief      Render a screen quad using the current context
+	 *
+	 * @param timerQuery Query object to use for measuring the runtime of the
+	 *                   draw call.
+	 */
+	void RenderScreenQuad(OpenGL::Query &timerQuery);
+
 	/**
 	 * @brief      Binds the texture containing the shadertoy result as well as
 	 *             a program which renders this texture to the viewport. Useful

src/RenderContext.cpp

@@ -382,6 +382,17 @@ void RenderContext::RenderScreenQuad()
 	glCall(glDrawElements, GL_TRIANGLES, 3 * 2, GL_UNSIGNED_INT, nullptr);
 }
 
+void RenderContext::RenderScreenQuad(OpenGL::Query &timerQuery)
+{
+	screenQuadCorners.Bind(GL_ARRAY_BUFFER);
+
+	timerQuery.Begin(GL_TIME_ELAPSED);
+
+	glCall(glDrawElements, GL_TRIANGLES, 3 * 2, GL_UNSIGNED_INT, nullptr);
+
+	timerQuery.End(GL_TIME_ELAPSED);
+}
+
 void RenderContext::BindResult()
 {
 	// Prepare prog and texture

src/ToyBuffer.cpp

@@ -161,14 +161,8 @@ void ToyBuffer::Render()
 	for (auto &inputs : boundInputs)
 		inputs->Apply();
 
-	// Start query measurement
-	timeDeltaQuery.Begin(GL_TIME_ELAPSED);
-
 	// Render the program
-	context.RenderScreenQuad();
-
-	// End query measurement
-	timeDeltaQuery.End(GL_TIME_ELAPSED);
+	context.RenderScreenQuad(timeDeltaQuery);
 
 	// Swap texture object pointers
 	swap(sourceTex, targetTex);