rsx: Add color interpolation animation

- Adds color interpolation and modulation pass and refactors the code a
bit. Elements with this pass applied have their color modulated by the
animated color from the pass. Modulation transform is multiplicative.

rpcs3/Emu/RSX/Overlays/overlay_animation.cpp

@@ -1,5 +1,4 @@
 #include "stdafx.h"
-#pragma optimize("", off)
 #include "overlay_animation.h"
 #include "overlay_controls.h"
 
@@ -9,6 +8,38 @@ namespace rsx
 {
     namespace overlays
     {
+        void animation_base::begin_animation(u64 frame)
+        {
+            frame_start = frame;
+            frame_end = u64(frame + duration * g_cfg.video.vblank_rate);
+        }
+
+        f32 animation_base::get_progress_ratio(u64 frame) const
+        {
+            if (!frame_start)
+            {
+                return 0.f;
+            }
+
+            f32 t = f32(frame - frame_start) / (frame_end - frame_start);
+
+            switch (type) {
+            case animation_type::linear:
+                break;
+            case animation_type::ease_in_quad:
+                t = t * t;
+                break;
+            case animation_type::ease_out_quad:
+                t = t * (2.0 - t);
+                break;
+            case animation_type::ease_in_out_cubic:
+                t = t > 0.5 ? 4.0 * std::pow((t - 1.0), 3.0) + 1.0 : 4.0 * std::pow(t, 3.0);
+                break;
+            }
+
+            return t;
+        }
+
         void animation_translate::apply(compiled_resource& resource)
         {
             if (!active)
@@ -36,9 +67,7 @@ namespace rsx
             if (frame_start == 0)
             {
                 start = current;
-                frame_start = frame;
-                frame_end = u64(frame + duration * g_cfg.video.vblank_rate);
-
+                begin_animation(frame);
                 return;
             }
 
@@ -49,23 +78,8 @@ namespace rsx
                 return;
             }
 
-            f32 t = f32(frame - frame_start) / (frame_end - frame_start);
-
-            switch (type) {
-            case animation_type::linear:
-                break;
-            case animation_type::ease_in_quad:
-                t = t * t;
-                break;
-            case animation_type::ease_out_quad:
-                t = t * (2.0 - t);
-                break;
-            case animation_type::ease_in_out_cubic:
-                t = t > 0.5 ? 4.0 * std::pow((t - 1.0), 3.0) + 1.0 : 4.0 * std::pow(t, 3.0);
-                break;
-            }
-
-            current = (1.f - t) * start + t * end;
+            f32 t = get_progress_ratio(frame);
+            current = lerp(start, end, t);
         }
 
         void animation_translate::finish()
@@ -80,5 +94,55 @@ namespace rsx
                 on_finish();
             }
         }
+
+        void animation_color_interpolate::apply(compiled_resource& data)
+        {
+            if (!active)
+            {
+                return;
+            }
+
+            for (auto& cmd : data.draw_commands)
+            {
+                cmd.config.color *= current;
+            }
+        }
+
+        void animation_color_interpolate::update(u64 frame)
+        {
+            if (!active)
+            {
+                return;
+            }
+
+            if (frame_start == 0)
+            {
+                start = current;
+                begin_animation(frame);
+                return;
+            }
+
+            if (frame >= frame_end)
+            {
+                finish();
+                return;
+            }
+
+            f32 t = get_progress_ratio(frame);
+            current = lerp(start, end, t);
+        }
+
+        void animation_color_interpolate::finish()
+        {
+            active = false;
+            frame_start = 0;
+            frame_end = 0;
+            current = end;
+
+            if (on_finish)
+            {
+                on_finish();
+            }
+        }
     };
 }

rpcs3/Emu/RSX/Overlays/overlay_animation.h

@@ -19,8 +19,23 @@ namespace rsx
 
         struct animation_base
         {
+        protected:
+            u64 frame_start = 0;
+            u64 frame_end = 0;
+
+            void begin_animation(u64 frame);
+            f32 get_progress_ratio(u64 frame) const;
+
+            template<typename T>
+            T lerp(const T& a, const T& b, f32 t) const
+            {
+                return (a * (1.f - t)) + (b * t);
+            }
+
+        public:
             bool active = false;
             animation_type type { animation_type::linear };
+            f32 duration = 1.f; // in seconds
 
             std::function<void()> on_finish;
 
@@ -34,12 +49,23 @@ namespace rsx
             vector3f start{}; // Set `current` instead of this
                               // NOTE: Necessary because update() is called after rendering,
                               //       resulting in one frame of incorrect translation
-            u64 frame_start = 0;
-            u64 frame_end = 0;
         public:
             vector3f current{};
             vector3f end{};
-            f32 duration{}; // in seconds
+
+            void apply(compiled_resource& data) override;
+            void update(u64 frame) override;
+            void finish();
+        };
+
+        struct animation_color_interpolate : animation_translate
+        {
+        private:
+            color4f start{};
+
+        public:
+            color4f current{};
+            color4f end{};
 
             void apply(compiled_resource& data) override;
             void update(u64 frame) override;