From 3f12927b77735c17eedfbe14f36607ddc6580c83 Mon Sep 17 00:00:00 2001
From: Paul Gilbert
Date: Sun, 3 Jul 2016 14:22:33 -0400
Subject: TITANIC: Added CVideoSurface transPixelate

---
 engines/titanic/support/video_surface.cpp | 28 ++++++++++++++++++++++++++++
 engines/titanic/support/video_surface.h   | 12 ++++++++++++
 2 files changed, 40 insertions(+)

(limited to 'engines/titanic/support')

diff --git a/engines/titanic/support/video_surface.cpp b/engines/titanic/support/video_surface.cpp
index e71b25184b..85a1aa1c58 100644
--- a/engines/titanic/support/video_surface.cpp
+++ b/engines/titanic/support/video_surface.cpp
@@ -476,6 +476,34 @@ bool OSVideoSurface::loadIfReady() {
 	}
 }
 
+void OSVideoSurface::transPixelate() {
+	if (!loadIfReady())
+		return;
+
+	lock();
+	Graphics::ManagedSurface *surface = _rawSurface;
+	uint transColor = getTransparencyColor();
+	// TODO: Check whether color is correct
+	uint pixelColor = surface->format.RGBToColor(0x50, 0, 0);
+
+	for (int yp = 0; yp < surface->h; ++yp) {
+		uint16 *pixelsP = (uint16 *)surface->getBasePtr(0, yp);
+		bool bitFlag = (yp % 2) == 0;
+		int replaceCtr = yp & 3;
+
+		for (int xp = 0; xp < surface->w; ++xp, ++pixelsP) {
+			if (bitFlag && *pixelsP == transColor && replaceCtr == 0)
+				*pixelsP = pixelColor;
+
+			bitFlag = !bitFlag;
+			replaceCtr = (replaceCtr + 1) & 3;
+		}
+	}
+
+	surface->markAllDirty();
+	unlock();
+}
+
 int OSVideoSurface::freeSurface() {
 	if (!_ddSurface)
 		return 0;
diff --git a/engines/titanic/support/video_surface.h b/engines/titanic/support/video_surface.h
index 9b7e0fbaec..45c6182fe6 100644
--- a/engines/titanic/support/video_surface.h
+++ b/engines/titanic/support/video_surface.h
@@ -224,6 +224,12 @@ public:
 	 */
 	virtual bool load() = 0;
 
+	/**
+	 * Does a replacement of transparent pixels on certain lines at regular
+	 * intervals. This is totally weird
+	 */
+	virtual void transPixelate() = 0;
+
 	virtual bool proc45();
 
 	/**
@@ -423,6 +429,12 @@ public:
 	 */
 	virtual bool load();
 
+	/**
+	 * Does a replacement of transparent pixels on certain lines at regular
+	 * intervals. This is totally weird
+	 */
+	virtual void transPixelate();
+
 	/**
 	 * Frees the underlying surface
 	 */
-- 
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