neutrino: implement COSDFader under GPL-3.0+

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

src/driver/fade.h

@@ -0,0 +1,2 @@
+/* for compatibility */
+#include "fader.h"

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;
+}

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