Convert an overly cut-and-pasted comment for AlphaDivisionEffect.

[movit] / effect_chain.h

diff --git a/effect_chain.h b/effect_chain.h
index 358deedbb5e34064e4d2c52119db4c4c30413dca..b87fce7e5bf651d811bd424d6386ec848c764a7a 100644 (file)
--- a/effect_chain.h
+++ b/effect_chain.h
@@ -104,6 +104,11 @@ struct Phase {
        // Identifier used to create unique variables in GLSL.
        // Unique per-phase to increase cacheability of compiled shaders.
        std::map<Node *, std::string> effect_ids;
+
+       // For measurement of GPU time used.
+       GLuint timer_query_object;
+       uint64_t time_elapsed_ns;
+       uint64_t num_measured_iterations;
 };
 
 class EffectChain {
@@ -161,6 +166,14 @@ public:
 
        void finalize();
 
+       // Measure the GPU time used for each actual phase during rendering.
+       // Note that this is only available if GL_ARB_timer_query
+       // (or, equivalently, OpenGL 3.3) is available. Also note that measurement
+       // will incur a performance cost, as we wait for the measurements to
+       // complete at the end of rendering.
+       void enable_phase_timing(bool enable);
+       void reset_phase_timing();
+       void print_phase_timing();
 
        //void render(unsigned char *src, unsigned char *dst);
        void render_to_screen()
@@ -300,6 +313,8 @@ private:
 
        ResourcePool *resource_pool;
        bool owns_resource_pool;
+
+       bool do_phase_timing;
 };
 
 }  // namespace movit