- Prevented direct reference to the back buffer in many cases (apart from a few, where it's modified directly)

- Added skeleton code for dirty rectangle handling (still unfinished and non-working)
- Added wrapper functions to access the back buffer, which add the appropriate dirty rectangles automatically

svn-id: r35264

1 files changed, 25 insertions, 0 deletions

diff --git a/engines/saga/gfx.cpp b/engines/saga/gfx.cpp
index 285a33b656..eac1d871ae 100644
--- a/engines/saga/gfx.cpp
+++ b/engines/saga/gfx.cpp
@@ -30,6 +30,7 @@
 #include "saga/interface.h"
 #include "saga/rscfile.h"
 #include "saga/scene.h"
+#include "saga/render.h"
 
 #include "common/system.h"
 #include "graphics/cursorman.h"
@@ -561,4 +562,28 @@ bool hitTestPoly(const Point *points, unsigned int npoints, const Point& test_po
 	return inside_flag;
 }
 
+// This method adds a dirty rectangle automatically
+void Gfx::drawFrame(const Common::Point &p1, const Common::Point &p2, int color) {
+	_backBuffer.drawFrame(p1, p2, color);
+	_vm->_render->addDirtyRect(Common::Rect(p1.x, p1.y, p2.x, p2.y));
+}
+
+// This method adds a dirty rectangle automatically
+void Gfx::drawRect(const Common::Rect &destRect, int color) {
+	_backBuffer.drawRect(destRect, color);
+	_vm->_render->addDirtyRect(destRect);
+}
+
+// This method adds a dirty rectangle automatically
+void Gfx::fillRect(const Common::Rect &destRect, uint32 color) {
+	_backBuffer.fillRect(destRect, color);
+	_vm->_render->addDirtyRect(destRect);
+}
+
+// This method adds a dirty rectangle automatically
+void Gfx::drawRegion(const Common::Rect &destRect, const byte *sourceBuffer) {
+	_backBuffer.blit(destRect, sourceBuffer);
+	_vm->_render->addDirtyRect(destRect);
+}
+
 } // End of namespace Saga