OSYSTEM: Add resetGraphicsScale() method.

This fixes a hack for resetting the graphics scale to x1 when starting games that have a large screen size. The SDL graphics manager should now scale back to x1 without changing the current scaler in use, as well as the OpenGL graphics manager.

svn-id: r51492

1 files changed, 4 insertions, 0 deletions

diff --git a/backends/graphics/sdl/sdl-graphics.cpp b/backends/graphics/sdl/sdl-graphics.cpp
index 2d61cec185..a6cf5c54dd 100644
--- a/backends/graphics/sdl/sdl-graphics.cpp
+++ b/backends/graphics/sdl/sdl-graphics.cpp
@@ -248,6 +248,10 @@ int SdlGraphicsManager::getDefaultGraphicsMode() const {
 	return GFX_DOUBLESIZE;
 }
 
+void SdlGraphicsManager::resetGraphicsScale() {
+	setGraphicsMode(s_gfxModeSwitchTable[_scalerType][0]);
+}
+
 void SdlGraphicsManager::beginGFXTransaction() {
 	assert(_transactionMode == kTransactionNone);