From 521ba2cb8ac6cbe4240ad4da7ad44d13449e3943 Mon Sep 17 00:00:00 2001
From: Bastien Bouclet
Date: Tue, 13 Sep 2016 20:25:13 +0200
Subject: OSYSTEM: Introduce a method allowing to draw a background activity
 icon

---
 backends/graphics/graphics.h |  1 +
 backends/modular-backend.cpp |  4 ++++
 backends/modular-backend.h   |  1 +
 common/system.h              | 19 +++++++++++++++++++
 4 files changed, 25 insertions(+)

diff --git a/backends/graphics/graphics.h b/backends/graphics/graphics.h
index 921dfca61c..271a482032 100644
--- a/backends/graphics/graphics.h
+++ b/backends/graphics/graphics.h
@@ -87,6 +87,7 @@ public:
 	virtual void copyRectToOSD(const void *buf, int pitch, int x, int y, int w, int h) {}
 	virtual void clearOSD() {}
 	virtual Graphics::PixelFormat getOSDFormat() { return Graphics::PixelFormat(); }
+	virtual void displayActivityIconOnOSD(const Graphics::Surface *icon) {}
 
 
 	// Graphics::PaletteManager interface
diff --git a/backends/modular-backend.cpp b/backends/modular-backend.cpp
index e1bdf15571..13db277a75 100644
--- a/backends/modular-backend.cpp
+++ b/backends/modular-backend.cpp
@@ -253,6 +253,10 @@ Graphics::PixelFormat ModularBackend::getOSDFormat() {
 	return _graphicsManager->getOSDFormat();
 }
 
+void ModularBackend::displayActivityIconOnOSD(const Graphics::Surface *icon) {
+	_graphicsManager->displayActivityIconOnOSD(icon);
+}
+
 void ModularBackend::quit() {
 	exit(0);
 }
diff --git a/backends/modular-backend.h b/backends/modular-backend.h
index 9cde27915f..886f91c320 100644
--- a/backends/modular-backend.h
+++ b/backends/modular-backend.h
@@ -130,6 +130,7 @@ public:
 	virtual void copyRectToOSD(const void *buf, int pitch, int x, int y, int w, int h);
 	virtual void clearOSD();
 	virtual Graphics::PixelFormat getOSDFormat();
+	virtual void displayActivityIconOnOSD(const Graphics::Surface *icon);
 
 	//@}
 
diff --git a/common/system.h b/common/system.h
index eb9a39bbdf..b07a5ffd1e 100644
--- a/common/system.h
+++ b/common/system.h
@@ -1101,6 +1101,25 @@ public:
 	 */
 	virtual void displayMessageOnOSD(const char *msg) = 0;
 
+	/**
+	 * Display an icon indicating background activity
+	 *
+	 * The icon is displayed in an 'on screen display'. It is visible above
+	 * the regular screen content or near it.
+	 *
+	 * The caller keeps ownership of the icon. It is acceptable to free
+	 * the surface just after the call.
+	 *
+	 * There is no preferred pixel format for the icon. The backend should
+	 * convert its copy of the icon to an appropriate format.
+	 *
+	 * The caller must call this method again with a null pointer
+	 * as a parameter to indicate the icon should no longer be displayed.
+	 *
+	 * @param icon the icon to display on screen
+	 */
+	virtual void displayActivityIconOnOSD(const Graphics::Surface *icon) = 0;
+
 	/**
 	* Blit a bitmap to the 'on screen display'.
 	*
-- 
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