Diff: CharFrame.cpp

Revision:

16:d0b142ba4362

Parent:

2:bb0f631a6068

--- a/CharFrame.cpp	Sat Jun 15 15:05:19 2013 +0000
+++ b/CharFrame.cpp	Sat Jun 15 19:27:36 2013 +0000
@@ -55,3 +55,35 @@
   gd->wr( address, BottomRight );
 }
 
+/****************/
+/* WIPE A FRAME */
+/****************/
+// Pass Gameduino to draw on in gd.
+// Pass x coordinate of top left in x.
+// Pass y coordinate of top left in y.
+// Pass width in w.
+// Pass height in h.
+void CharFrame::Wipe( Gameduino *gd, UInt8 x, UInt8 y, UInt8 w, UInt8 h ) {
+  // Calculate address for top left.
+  unsigned int rowStart = Gameduino::RAM_PIC + y * SCREEN_CHAR_WIDTH + x;
+  unsigned int address;
+  UInt8 count;
+  // Wipe top edge.
+  address = rowStart;
+  for( count = w; count > 0; --count ) {
+    gd->wr( address++, TransparentChar );
+  }
+  // Wipe left and right edges.
+  address = rowStart + SCREEN_CHAR_WIDTH;
+  if( h > 2 ) {
+      for( count = h - 2; count > 0; --count ) {
+          gd->wr( address, TransparentChar );
+          gd->wr( address + w - 1, TransparentChar );
+      }
+  }
+  // Wipe bottom edge.
+  address = rowStart + SCREEN_CHAR_WIDTH * ( h - 1 );
+  for( count = w; count > 0; --count ) {
+    gd->wr( address++, TransparentChar );
+  }
+}