Stroking on tab widgets. Basic support for backcaching.

svn-id: r33084

3 files changed, 24 insertions, 6 deletions

diff --git a/gui/ThemeDefaultXML.cpp b/gui/ThemeDefaultXML.cpp
index 0561f4b8d1..bbd18fce5c 100644
--- a/gui/ThemeDefaultXML.cpp
+++ b/gui/ThemeDefaultXML.cpp
@@ -63,7 +63,7 @@ bool ThemeRenderer::loadDefaultXML() {
 	
 	"<drawdata id = 'tab_active' cache = false>"
 		"<text vertical_align = 'center' horizontal_align = 'center' color = '255, 255, 255' />"
-		"<drawstep func = 'tab' radius = '8' stroke = '0' fill = 'gradient' gradient_start = '206, 121, 99' gradient_end = '173, 40, 8' shadow = 3 />"
+		"<drawstep func = 'tab' radius = '8' stroke = '2' fill = 'gradient' gradient_start = '206, 121, 99' gradient_end = '173, 40, 8' shadow = 3 />"
 	"</drawdata>"
 	
 	"<drawdata id = 'tab_inactive' cache = false>"
diff --git a/gui/ThemeRenderer.cpp b/gui/ThemeRenderer.cpp
index 7995c34a40..4b56eba4a2 100644
--- a/gui/ThemeRenderer.cpp
+++ b/gui/ThemeRenderer.cpp
@@ -76,7 +76,7 @@ const char *ThemeRenderer::kDrawDataStrings[] = {
 
 ThemeRenderer::ThemeRenderer(Common::String themeName, GraphicsMode mode) : 
 	_vectorRenderer(0), _system(0), _graphicsMode(kGfxDisabled), 
-	_screen(0), _bytesPerPixel(0), _initOk(false), _themeOk(false), _enabled(false) {
+	_screen(0), _backBuffer(0), _bytesPerPixel(0), _initOk(false), _themeOk(false), _enabled(false) {
 	_system = g_system;
 	_parser = new ThemeParser(this);
 
@@ -153,9 +153,15 @@ void ThemeRenderer::disable() {
 }
 
 template<typename PixelType> 
-void ThemeRenderer::screenInit() {
+void ThemeRenderer::screenInit(bool backBuffer) {
 	freeScreen();
-
+	freeBackbuffer();
+	
+	if (backBuffer) {
+		_backBuffer = new Surface;
+		_backBuffer->create(_system->getOverlayWidth(), _system->getOverlayHeight(), sizeof(PixelType));
+	}
+	
 	_screen = new Surface;
 	_screen->create(_system->getOverlayWidth(), _system->getOverlayHeight(), sizeof(PixelType));
 	_system->clearOverlay();
@@ -166,7 +172,7 @@ void ThemeRenderer::setGraphicsMode(GraphicsMode mode) {
 	case kGfxStandard16bit:
 	case kGfxAntialias16bit:
 		_bytesPerPixel = sizeof(uint16);
-		screenInit<uint16>();
+		screenInit<uint16>(kEnableBackCaching);
 		break;
 
 	default:
diff --git a/gui/ThemeRenderer.h b/gui/ThemeRenderer.h
index 3addda17a7..e7e320d048 100644
--- a/gui/ThemeRenderer.h
+++ b/gui/ThemeRenderer.h
@@ -73,6 +73,9 @@ class ThemeRenderer : public Theme {
 
 	/** Constant value to expand dirty rectangles, to make sure they are fully copied */
 	static const int kDirtyRectangleThreshold = 2;
+	
+	/** Sets whether backcaching is enabled */
+	static const bool kEnableBackCaching = true;
 
 public:
 	enum GraphicsMode {
@@ -204,7 +207,7 @@ public:
 	void setGraphicsMode(GraphicsMode mode);
 
 protected:
-	template<typename PixelType> void screenInit();
+	template<typename PixelType> void screenInit(bool backBuffer);
 
 	bool loadThemeXML(Common::String themeName);
 	bool loadDefaultXML();
@@ -228,6 +231,14 @@ protected:
 		delete _vectorRenderer;
 		_vectorRenderer = 0;
 	}
+	
+	void freeBackbuffer() {
+		if (_backBuffer != 0) {
+			_backBuffer->free();
+			delete _backBuffer;
+			_backBuffer = 0;
+		}
+	}
 
 	void freeScreen() {
 		if (_screen != 0) {
@@ -283,6 +294,7 @@ protected:
 	GUI::ThemeParser *_parser;
 
 	Graphics::Surface *_screen;
+	Graphics::Surface *_backBuffer;
 
 	int _bytesPerPixel;
 	GraphicsMode _graphicsMode;