4 files changed, 8 insertions, 42 deletions

diff --git a/drivers/gles3/rasterizer_gles3.cpp b/drivers/gles3/rasterizer_gles3.cpp
index 1abdaa5f80..97c4a98aab 100644
--- a/drivers/gles3/rasterizer_gles3.cpp
+++ b/drivers/gles3/rasterizer_gles3.cpp
@@ -192,22 +192,15 @@ void RasterizerGLES3::initialize() {
 	scene->initialize();
 }
 
-void RasterizerGLES3::begin_frame() {
+void RasterizerGLES3::begin_frame(double frame_step) {
 
-	uint64_t tick = OS::get_singleton()->get_ticks_usec();
+	time_total += frame_step;
 
-	double delta = double(tick - prev_ticks) / 1000000.0;
-	delta *= Engine::get_singleton()->get_time_scale();
-
-	time_total += delta;
-
-	if (delta == 0) {
+	if (frame_step == 0) {
 		//to avoid hiccups
-		delta = 0.001;
+		frame_step = 0.001;
 	}
 
-	prev_ticks = tick;
-
 	double time_roll_over = GLOBAL_GET("rendering/limits/time/time_rollover_secs");
 	if (time_total > time_roll_over)
 		time_total = 0; //roll over every day (should be customz
@@ -217,9 +210,7 @@ void RasterizerGLES3::begin_frame() {
 	storage->frame.time[2] = Math::fmod(time_total, 900);
 	storage->frame.time[3] = Math::fmod(time_total, 60);
 	storage->frame.count++;
-	storage->frame.delta = delta;
-
-	storage->frame.prev_tick = tick;
+	storage->frame.delta = frame_step;
 
 	storage->update_dirty_resources();
 
@@ -281,7 +272,7 @@ void RasterizerGLES3::set_boot_image(const Ref<Image> &p_image, const Color &p_c
 	if (p_image.is_null() || p_image->empty())
 		return;
 
-	begin_frame();
+	begin_frame(0.0);
 
 	int window_w = OS::get_singleton()->get_video_mode(0).width;
 	int window_h = OS::get_singleton()->get_video_mode(0).height;
@@ -333,28 +324,7 @@ void RasterizerGLES3::set_boot_image(const Ref<Image> &p_image, const Color &p_c
 
 	storage->free(texture); // free since it's only one frame that stays there
 
-	if (OS::get_singleton()->is_layered_allowed()) {
-		if (OS::get_singleton()->get_window_per_pixel_transparency_enabled()) {
-#if (defined WINDOWS_ENABLED) && !(defined UWP_ENABLED)
-			Size2 wndsize = OS::get_singleton()->get_layered_buffer_size();
-			uint8_t *data = OS::get_singleton()->get_layered_buffer_data();
-			if (data) {
-				glReadPixels(0, 0, wndsize.x, wndsize.y, GL_BGRA, GL_UNSIGNED_BYTE, data);
-				OS::get_singleton()->swap_layered_buffer();
-
-				return;
-			}
-#endif
-		} else {
-			//clear alpha
-			glColorMask(false, false, false, true);
-			glClearColor(0, 0, 0, 1);
-			glClear(GL_COLOR_BUFFER_BIT);
-			glColorMask(true, true, true, true);
-		}
-	}
-
-	OS::get_singleton()->swap_buffers();
+	end_frame(true);
 }
 
 void RasterizerGLES3::blit_render_target_to_screen(RID p_render_target, const Rect2 &p_screen_rect, int p_screen) {
@@ -451,7 +421,6 @@ RasterizerGLES3::RasterizerGLES3() {
 	scene->storage = storage;
 	storage->scene = scene;
 
-	prev_ticks = 0;
 	time_total = 0;
 }
 
diff --git a/drivers/gles3/rasterizer_gles3.h b/drivers/gles3/rasterizer_gles3.h
index 5213101778..f4449ac0f9 100644
--- a/drivers/gles3/rasterizer_gles3.h
+++ b/drivers/gles3/rasterizer_gles3.h
@@ -44,7 +44,6 @@ class RasterizerGLES3 : public Rasterizer {
 	RasterizerCanvasGLES3 *canvas;
 	RasterizerSceneGLES3 *scene;
 
-	uint64_t prev_ticks;
 	double time_total;
 
 public:
@@ -55,7 +54,7 @@ public:
 	virtual void set_boot_image(const Ref<Image> &p_image, const Color &p_color, bool p_scale);
 
 	virtual void initialize();
-	virtual void begin_frame();
+	virtual void begin_frame(double frame_step);
 	virtual void set_current_render_target(RID p_render_target);
 	virtual void restore_render_target();
 	virtual void clear_render_target(const Color &p_color);
diff --git a/drivers/gles3/rasterizer_storage_gles3.cpp b/drivers/gles3/rasterizer_storage_gles3.cpp
index 9e389a353e..6361ddc846 100644
--- a/drivers/gles3/rasterizer_storage_gles3.cpp
+++ b/drivers/gles3/rasterizer_storage_gles3.cpp
@@ -7489,7 +7489,6 @@ void RasterizerStorageGLES3::initialize() {
 #endif
 
 	frame.count = 0;
-	frame.prev_tick = 0;
 	frame.delta = 0;
 	frame.current_rt = NULL;
 	config.keep_original_textures = false;
diff --git a/drivers/gles3/rasterizer_storage_gles3.h b/drivers/gles3/rasterizer_storage_gles3.h
index 1db577f23c..d9c770d1b7 100644
--- a/drivers/gles3/rasterizer_storage_gles3.h
+++ b/drivers/gles3/rasterizer_storage_gles3.h
@@ -1427,7 +1427,6 @@ public:
 		int canvas_draw_commands;
 		float time[4];
 		float delta;
-		uint64_t prev_tick;
 		uint64_t count;
 
 	} frame;