[Scummvm-cvs-logs] SF.net SVN: scummvm:[53336] scummvm/trunk/engines/sword25/gfx/opengl/ glimage.cpp

[sev at users.sourceforge.net]

Revision: 53336
          http://scummvm.svn.sourceforge.net/scummvm/?rev=53336&view=rev
Author:   sev
Date:     2010-10-12 23:43:24 +0000 (Tue, 12 Oct 2010)

Log Message:
-----------
SWORD25: Implement transparent bg color for images

Modified Paths:
--------------
    scummvm/trunk/engines/sword25/gfx/opengl/glimage.cpp

Modified: scummvm/trunk/engines/sword25/gfx/opengl/glimage.cpp
===================================================================
--- scummvm/trunk/engines/sword25/gfx/opengl/glimage.cpp	2010-10-12 23:43:03 UTC (rev 53335)
+++ scummvm/trunk/engines/sword25/gfx/opengl/glimage.cpp	2010-10-12 23:43:24 UTC (rev 53336)
@@ -213,13 +213,21 @@
 		img = &srcImage;
 	}
 
-	if ((color & 0xff000000) != 0xff000000) {
-		warning("STUB: Image transparent bg color: %x", color);
-	}
+	int ca = (color >> 24) & 0xff;
 	int cr = (color >> 16) & 0xff;
 	int cg = (color >> 8) & 0xff;
 	int cb = (color >> 0) & 0xff;
 
+	// Check if we need to draw anything at all
+	if (ca == 0)
+		return true;
+
+	if (ca != 255) {
+		cr = cr * ca >> 8;
+		cg = cg * ca >> 8;
+		cb = cb * ca >> 8;
+	}
+
 	// Handle off-screen clipping
 	if (posY < 0) {
 		img->h -= -posY;


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