[Libwpg-cvs] libwpg/src/lib WPG1Parser.cpp,1.41,1.42

[Fridrich S. <str...@us...>]

Update of /cvsroot/libwpg/libwpg/src/lib
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv17370/src/lib

Modified Files:
	WPG1Parser.cpp 
Log Message:
handle bitmaps with colour depth 2 and 4 in wpg1

Index: WPG1Parser.cpp
===================================================================
RCS file: /cvsroot/libwpg/libwpg/src/lib/WPG1Parser.cpp,v
retrieving revision 1.41
retrieving revision 1.42
diff -u -d -r1.41 -r1.42
--- WPG1Parser.cpp	17 Jul 2008 14:41:57 -0000	1.41
+++ WPG1Parser.cpp	17 Jul 2008 15:38:19 -0000	1.42
@@ -558,8 +558,8 @@
 				if (!raster_source || raster_source < buffer)
 					return 0;
 				for( ; count; --count)
-					for(unsigned r = 0; r < scanline_width && ptr < buffer + buffer_size; r++)
-						*ptr++ = raster_source[r];
+					for(unsigned r = 0; r < scanline_width && ptr < buffer + buffer_size;)
+						*ptr++ = raster_source[r++];
 			}
 		}
 	}
@@ -593,9 +593,36 @@
 					bitmap.setPixel(x, y, black);
 		}
 	}
-
-	// 8-bit image: indexed color
-	if(depth == 8)
+	// 2-bit image: 4-color bitmap (indexed)
+	else if(depth == 2)
+	{
+		int i = 0;
+		for (int y = 0; y < height; y++)
+		for (int x = 0; x < width; x++, i++)
+		{
+			if ((x==0) && (i % 4 != 0))
+				i = (i/4 + 1) * 4;
+			unsigned index = ((buffer[i/4] & (0x03 << 2*(3 - (i % 4)))) >> 2*(3 - (i % 4)));
+			const libwpg::WPGColor& color = m_colorPalette[index];
+			bitmap.setPixel(x, y, color);
+		}
+	}
+	// 4 -bit image: 16-colour bitmap (indexed)
+	else if(depth == 4)
+	{
+		int i = 0;
+		for (int y = 0; y < height; y++)
+		for (int x = 0; x < width; x++, i++)
+		{
+			if ((x==0) && (i % 2 != 0))
+				i = (i/2 + 1) * 2;
+			unsigned index = ((buffer[i/2] & (0x0f << 4*(1 - (i % 2)))) >> 4*(1 - (i % 2)));
+			const libwpg::WPGColor& color = m_colorPalette[index];
+			bitmap.setPixel(x, y, color);
+		}
+	}
+	// 8-bit image: 256-colour image (indexed)
+	else if(depth == 8)
 	{
 		for(int y = 0; y < height; y++)
 		{
@@ -761,7 +788,7 @@
 	if (!m_graphicsStarted)
 		return;
 #ifdef DEBUG
-	size_t lengthOfData = readU32();
+	unsigned lengthOfData = readU32();
 	int rotation = readS16();
 #else
 	readU32();