Preparation of more correct support for state stack.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13201 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/servers/app/LayerData.h

@@ -51,6 +51,9 @@ class DrawData {
 								DrawData(const DrawData& from);
 	virtual						~DrawData();
 
+	// NOTE: this operator will not make a 1:1 copy, it is used
+	// for the state stack and therefor origin and scale are reset
+	// to B_ORIGIN and 1.0.
 			DrawData&			operator=(const DrawData& from);
 
 								// coordinate transformation
@@ -155,13 +158,16 @@ class DrawData {
 			float				fPenSize;
 
 			ServerFont			fFont;
+// TODO: Remove, see above
 			bool				fFontAntiAliasing;
 			escapement_delta	fEscapementDelta;
+//
 
 			cap_mode			fLineCapMode;
 			join_mode			fLineJoinMode;
 			float				fMiterLimit;
-
+			// "internal", used to calculate the size
+			// of the font (again) when the scale changes
 			float				fUnscaledFontSize;
 };
 

src/servers/app/LayerData.cpp

@@ -81,8 +81,16 @@ DrawData::~DrawData()
 DrawData&
 DrawData::operator=(const DrawData& from)
 {
-	fOrigin				= from.fOrigin;
+	// NOTE: This function is intended for use by the Layer
-	fScale				= from.fScale;
+	// state stack only.
+	// So it does not make a true copy of the DrawData, but resets
+	// fOrigin and fScale and uses the current the font size as
+	// fUnscaledFontSize.
+
+//	fOrigin				= from.fOrigin;
+//	fScale				= from.fScale;
+	fOrigin				= BPoint(0.0, 0.0);
+	fScale				= 1.0;
 
 	if (from.fClippingRegion) {
 		SetClippingRegion(*(from.fClippingRegion));
@@ -110,7 +118,11 @@ DrawData::operator=(const DrawData& from)
 	fLineJoinMode		= from.fLineJoinMode;
 	fMiterLimit			= from.fMiterLimit;
 
-	fUnscaledFontSize	= from.fUnscaledFontSize;
+//	fUnscaledFontSize	= from.fUnscaledFontSize;
+	// Since fScale is reset to 1.0, the unscaled
+	// font size is the current size of the font
+	// (which is from.fFont.Size() * from.fScale)
+	fUnscaledFontSize	= fFont.Size();
 
 	return *this;
 }