From 7ff1f918084b8d41826ad869d8c9865e1d53e082 Mon Sep 17 00:00:00 2001
From: Alexander Tkachev
Date: Fri, 3 Jun 2016 17:44:26 +0600
Subject: GUI: Add copyRectToOSD()

I was lazy to implement that in OpenGLGraphicsManager and I'm not sure
it's implemented correctly in SurfaceSdlGraphicsManager, but it works
for me.
---
 backends/graphics/graphics.h                       |  1 +
 backends/graphics/opengl/opengl-graphics.cpp       |  6 +++
 backends/graphics/opengl/opengl-graphics.h         |  1 +
 .../graphics/surfacesdl/surfacesdl-graphics.cpp    | 48 ++++++++++++++++++++++
 backends/graphics/surfacesdl/surfacesdl-graphics.h |  1 +
 5 files changed, 57 insertions(+)

(limited to 'backends/graphics')

diff --git a/backends/graphics/graphics.h b/backends/graphics/graphics.h
index 3671b9f0b9..8b0ac19d9e 100644
--- a/backends/graphics/graphics.h
+++ b/backends/graphics/graphics.h
@@ -84,6 +84,7 @@ public:
 	virtual void setCursorPalette(const byte *colors, uint start, uint num) = 0;
 
 	virtual void displayMessageOnOSD(const char *msg) {}
+	virtual void copyRectToOSD(const void *buf, int pitch, int x, int y, int w, int h) {}
 
 	// Graphics::PaletteManager interface
 	//virtual void setPalette(const byte *colors, uint start, uint num) = 0;
diff --git a/backends/graphics/opengl/opengl-graphics.cpp b/backends/graphics/opengl/opengl-graphics.cpp
index 4d6a00a3b3..e9f26bc7bc 100644
--- a/backends/graphics/opengl/opengl-graphics.cpp
+++ b/backends/graphics/opengl/opengl-graphics.cpp
@@ -751,6 +751,12 @@ void OpenGLGraphicsManager::displayMessageOnOSD(const char *msg) {
 #endif
 }
 
+void OpenGLGraphicsManager::copyRectToOSD(const void *buf, int pitch, int x, int y, int w, int h) {
+#ifdef USE_OSD
+	warning("implement copyRectToOSD"); //TODO
+#endif
+}
+
 void OpenGLGraphicsManager::setPalette(const byte *colors, uint start, uint num) {
 	assert(_gameScreen->hasPalette());
 
diff --git a/backends/graphics/opengl/opengl-graphics.h b/backends/graphics/opengl/opengl-graphics.h
index 35435c156e..e0d1664e76 100644
--- a/backends/graphics/opengl/opengl-graphics.h
+++ b/backends/graphics/opengl/opengl-graphics.h
@@ -115,6 +115,7 @@ public:
 	virtual void setCursorPalette(const byte *colors, uint start, uint num);
 
 	virtual void displayMessageOnOSD(const char *msg);
+	virtual void copyRectToOSD(const void *buf, int pitch, int x, int y, int w, int h);
 
 	// PaletteManager interface
 	virtual void setPalette(const byte *colors, uint start, uint num);
diff --git a/backends/graphics/surfacesdl/surfacesdl-graphics.cpp b/backends/graphics/surfacesdl/surfacesdl-graphics.cpp
index 5b591e77ff..88fdc09f0a 100644
--- a/backends/graphics/surfacesdl/surfacesdl-graphics.cpp
+++ b/backends/graphics/surfacesdl/surfacesdl-graphics.cpp
@@ -2197,6 +2197,54 @@ void SurfaceSdlGraphicsManager::displayMessageOnOSD(const char *msg) {
 	// Ensure a full redraw takes place next time the screen is updated
 	_forceFull = true;
 }
+
+void SurfaceSdlGraphicsManager::copyRectToOSD(const void *buf, int pitch, int x, int y, int w, int h) {
+	assert(_transactionMode == kTransactionNone);
+	assert(buf);
+
+	Common::StackLock lock(_graphicsMutex);	// Lock the mutex until this function ends
+
+	// Lock the OSD surface for drawing
+	if (SDL_LockSurface(_osdSurface))
+		error("displayMessageOnOSD: SDL_LockSurface failed: %s", SDL_GetError());
+
+#ifdef USE_RGB_COLOR
+	byte *dst = (byte *)_osdSurface->pixels + y * _osdSurface->pitch + x * _osdSurface->format->BytesPerPixel;
+	if (_videoMode.screenWidth == w && pitch == _osdSurface->pitch) {
+		memcpy(dst, buf, h*pitch);
+	} else {
+		const byte *src = (const byte *)buf;
+		do {
+			memcpy(dst, src, w * _osdSurface->format->BytesPerPixel);
+			src += pitch;
+			dst += _osdSurface->pitch;
+		} while (--h);
+	}
+#else
+	byte *dst = (byte *)_osdSurface->pixels + y * _osdSurface->pitch + x;
+	if (_osdSurface->pitch == pitch && pitch == w) {
+		memcpy(dst, buf, h*w);
+	} else {
+		const byte *src = (const byte *)buf;
+		do {
+			memcpy(dst, src, w);
+			src += pitch;
+			dst += _osdSurface->pitch;
+		} while (--h);
+	}
+#endif
+
+	// Finished drawing, so unlock the OSD surface again
+	SDL_UnlockSurface(_osdSurface);
+
+	// Init the OSD display parameters, and the fade out
+	_osdAlpha = SDL_ALPHA_TRANSPARENT + kOSDInitialAlpha * (SDL_ALPHA_OPAQUE - SDL_ALPHA_TRANSPARENT) / 100;
+	_osdFadeStartTime = SDL_GetTicks() + kOSDFadeOutDelay;
+	SDL_SetAlpha(_osdSurface, SDL_RLEACCEL | SDL_SRCCOLORKEY | SDL_SRCALPHA, _osdAlpha);
+
+	// Ensure a full redraw takes place next time the screen is updated
+	_forceFull = true;
+}
 #endif
 
 bool SurfaceSdlGraphicsManager::handleScalerHotkeys(Common::KeyCode key) {
diff --git a/backends/graphics/surfacesdl/surfacesdl-graphics.h b/backends/graphics/surfacesdl/surfacesdl-graphics.h
index 25d6ff041c..a8bafd0a84 100644
--- a/backends/graphics/surfacesdl/surfacesdl-graphics.h
+++ b/backends/graphics/surfacesdl/surfacesdl-graphics.h
@@ -145,6 +145,7 @@ public:
 
 #ifdef USE_OSD
 	virtual void displayMessageOnOSD(const char *msg);
+	virtual void copyRectToOSD(const void *buf, int pitch, int x, int y, int w, int h);
 #endif
 
 	// Override from Common::EventObserver
-- 
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