GRAPHICS: Add setBackgroundPattern() to MacWindow

Set a background pattern for the window surface. For instance, the
exits window in the MacVenture engine should have a light gray
background, rather than a white one, and this will allow it to get
one without having to draw it by itself.

1 files changed, 27 insertions, 0 deletions

diff --git a/graphics/macgui/macwindow.cpp b/graphics/macgui/macwindow.cpp
index ea9a0a141d..2a6e191ded 100644
--- a/graphics/macgui/macwindow.cpp
+++ b/graphics/macgui/macwindow.cpp
@@ -44,6 +44,9 @@ MacWindow::MacWindow(int id, bool scrollable, bool resizable, bool editable, Mac
 	_active = false;
 	_borderIsDirty = true;
 
+	_pattern = 0;
+	_hasPattern = false;
+
 	_highlightedPart = kBorderNone;
 
 	_scrollPos = _scrollSize = 0.0;
@@ -83,6 +86,10 @@ void MacWindow::resize(int w, int h) {
 
 	_surface.free();
 	_surface.create(w, h, PixelFormat::createFormatCLUT8());
+
+	if (_hasPattern)
+		drawPattern();
+
 	_borderSurface.free();
 	_borderSurface.create(w, h, PixelFormat::createFormatCLUT8());
 	_composeSurface.free();
@@ -115,6 +122,13 @@ void MacWindow::setDimensions(const Common::Rect &r) {
 	_contentIsDirty = true;
 }
 
+void MacWindow::setBackgroundPattern(int pattern) {
+	_pattern = pattern;
+	_hasPattern = true;
+	drawPattern();
+	_contentIsDirty = true;
+}
+
 bool MacWindow::draw(ManagedSurface *g, bool forceRedraw) {
 	if (!_borderIsDirty && !_contentIsDirty && !forceRedraw)
 		return false;
@@ -273,6 +287,19 @@ void MacWindow::drawSimpleBorder(ManagedSurface *g) {
 	}
 }
 
+void MacWindow::drawPattern() {
+	byte *pat = _wm->getPatterns()[_pattern - 1];
+	for (int y = 0; y < _surface.h; y++) {
+		for (int x = 0; x < _surface.w; x++) {
+			byte *dst = (byte *)_surface.getBasePtr(x, y);
+			if (pat[y % 8] & (1 << (7 - (x % 8))))
+				*dst = kColorBlack;
+			else
+				*dst = kColorWhite;
+		}
+	}
+}
+
 void MacWindow::setHighlight(WindowClick highlightedPart) {
 	if (_highlightedPart == highlightedPart)
 		return;