GOB: Add Surface::drawRect()

scummvm · Jun 22, 2012 · 62cf663 · 62cf663
1 parent b1e50b4
commit 62cf663
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diff --git a/engines/gob/surface.cpp b/engines/gob/surface.cpp
@@ -695,6 +695,34 @@ void Surface::drawLine(uint16 x0, uint16 y0, uint16 x1, uint16 y1, uint32 color)
 	Graphics::drawLine(x0, y0, x1, y1, color, &plotPixel, this);
 }
 
+void Surface::drawRect(uint16 left, uint16 top, uint16 right, uint16 bottom, uint32 color) {
+	// Just in case those are swapped
+	if (left > right)
+		SWAP(left, right);
+	if (top  > bottom)
+		SWAP(top, bottom);
+
+	if ((left >= _width) || (top >= _height))
+		// Nothing to do
+		return;
+
+	// Area to actually draw
+	const uint16 width  = CLIP<int32>(right  - left + 1, 0, _width  - left);
+	const uint16 height = CLIP<int32>(bottom - top  + 1, 0, _height - top);
+
+	if ((width == 0) || (height == 0))
+		// Nothing to do
+		return;
+
+	right  = left + width  - 1;
+	bottom = top  + height - 1;
+
+	drawLine(left , top   , left , bottom, color);
+	drawLine(right, top   , right, bottom, color);
+	drawLine(left , top   , right, top   , color);
+	drawLine(left , bottom, right, bottom, color);
+}
+
 /*
  * The original's version of the Bresenham Algorithm was a bit "unclean"
  * and produced strange edges at 45, 135, 225 and 315 degrees, so using the

diff --git a/engines/gob/surface.h b/engines/gob/surface.h
@@ -158,6 +158,7 @@ class Surface {
 
 	void putPixel(uint16 x, uint16 y, uint32 color);
 	void drawLine(uint16 x0, uint16 y0, uint16 x1, uint16 y1, uint32 color);
+	void drawRect(uint16 left, uint16 top, uint16 right, uint16 bottom, uint32 color);
 	void drawCircle(uint16 x0, uint16 y0, uint16 radius, uint32 color, int16 pattern = 0);
 
 	void blitToScreen(uint16 left, uint16 top, uint16 right, uint16 bottom, uint16 x, uint16 y) const;