From 589d1114ecb5fea8f2a9f68f0d06c158292044b0 Mon Sep 17 00:00:00 2001
From: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: Wed, 7 Dec 2011 22:42:26 +0100
Subject: [PATCH] neutrino: implement COSDFader under GPL-3.0+

---
 src/driver/Makefile.am |  1 +
 src/driver/fade.h      |  2 +
 src/driver/fader.cpp   | 98 ++++++++++++++++++++++++++++++++++++++++++
 src/driver/fader.h     | 42 ++++++++++++++++++
 4 files changed, 143 insertions(+)
 create mode 100644 src/driver/fade.h
 create mode 100644 src/driver/fader.cpp
 create mode 100644 src/driver/fader.h

diff --git a/src/driver/Makefile.am b/src/driver/Makefile.am
index 1a412eaf6..b07bc9bda 100644
--- a/src/driver/Makefile.am
+++ b/src/driver/Makefile.am
@@ -32,6 +32,7 @@ libneutrino_driver_a_SOURCES = \
 	streamts.cpp \
 	radiotools.cpp \
 	radiotext.cpp \
+	fader.cpp \
 	screenshot.cpp \
 	ringbuffer.c \
 	volume.cpp
diff --git a/src/driver/fade.h b/src/driver/fade.h
new file mode 100644
index 000000000..8bef1cb90
--- /dev/null
+++ b/src/driver/fade.h
@@ -0,0 +1,2 @@
+/* for compatibility */
+#include "fader.h"
diff --git a/src/driver/fader.cpp b/src/driver/fader.cpp
new file mode 100644
index 000000000..cdb6a4985
--- /dev/null
+++ b/src/driver/fader.cpp
@@ -0,0 +1,98 @@
+/*
+	Neutrino-HD GUI, COSDFader implementation
+	Copyright (C) 2011 Stefan Seyfried
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <global.h>
+#include <driver/rcinput.h>
+#include <driver/fade.h>
+
+COSDFader::COSDFader(int trans)
+{
+	fb = CFrameBuffer::getInstance();
+	target_trans = trans;
+	timer = 0;
+	step = 0;
+}
+
+COSDFader::~COSDFader()
+{
+	Stop();
+}
+
+void COSDFader::StartFadeIn()
+{
+	transparency = 100;
+	step = -FADE_STEP;
+	Fade();
+}
+
+/* returns true if fade out was not started before and fade is enabled */
+bool COSDFader::StartFadeOut()
+{
+	if (!g_settings.widget_fade) /* disabled */
+		return false;
+	if (step == FADE_STEP) /* already fading out... */
+		return false;
+
+	/* start fading */
+	step = FADE_STEP;
+	Fade();
+	return true;
+}
+
+void COSDFader::Stop()
+{
+	if (!step)
+		return;
+
+	g_RCInput->killTimer(timer);
+	fb->setBlendMode(1); /* per pixel alpha */
+}
+
+/* returns true if fade out is finished */
+bool COSDFader::Fade()
+{
+	if (!g_settings.widget_fade)
+		return false;
+
+	if (timer == 0)
+		timer = g_RCInput->addTimer(FADE_TIME, false);
+
+	if (transparency == 100 || transparency == target_trans)
+	{
+		fb->setBlendMode(2); /* 2 == "global alpha x pixel alpha" */
+		fb->setBlendLevel(transparency);
+		transparency += step;
+		return false;
+	}
+	transparency += step;
+	if (step > 0 && transparency >= 100) /* finished fading out */
+	{
+		transparency = target_trans;
+		g_RCInput->killTimer(timer);
+		return true;
+	}
+	if (step < 0 && transparency <= target_trans) /* finished fading in */
+	{
+		transparency = target_trans;
+		g_RCInput->killTimer(timer);
+		fb->setBlendMode(1); /* 1 == "per pixel alpha" */
+		return false;
+	}
+	fb->setBlendLevel(transparency);
+	return false;
+}
diff --git a/src/driver/fader.h b/src/driver/fader.h
new file mode 100644
index 000000000..fa386010b
--- /dev/null
+++ b/src/driver/fader.h
@@ -0,0 +1,42 @@
+/*
+	Neutrino-HD GUI, COSDFader implementation
+	Copyright (C) 2011 Stefan Seyfried
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __FADER_H__
+#define __FADER_H__
+
+#include <driver/framebuffer.h>
+
+class COSDFader
+{
+	private:
+		CFrameBuffer *fb;
+		int step;
+		int target_trans;
+		int transparency;
+		uint32_t timer;
+	public:
+		COSDFader(int trans);
+		~COSDFader();
+
+		void StartFadeIn();
+		bool StartFadeOut();
+		void Stop();
+		bool Fade();
+		uint32_t GetTimer(){ return timer; };
+};
+#endif