Index: source/blender/editors/interface/interface_panel.c
===================================================================
--- source/blender/editors/interface/interface_panel.c	(Revision 21774)
+++ source/blender/editors/interface/interface_panel.c	(Arbeitskopie)
@@ -465,7 +465,7 @@
 }
 
 
-static void ui_draw_aligned_panel_header(ARegion *ar, uiStyle *style, uiBlock *block, rcti *rect)
+static void ui_draw_aligned_panel_header(ARegion *ar, uiStyle *style, uiBlock *block, rcti *rect, char dir)
 {
 	Panel *panel= block->panel;
 	Panel *pa;
@@ -492,12 +492,20 @@
 		UI_ThemeColor(TH_TITLE);
 		
 		hrect= *rect;
+		if(dir == 'h') {
 		hrect.xmin= rect->xmin+pnl_icons;
 		uiStyleFontDraw(&style->paneltitle, &hrect, activename);
+		}
+		else {
+			/* ignore 'pnl_icons' */
+			hrect.xmin= rect->xmin + (PNL_ICON+5)/block->aspect + 0.001f;
+			uiStyleFontDrawRotated(&style->paneltitle, &hrect, activename);
+		}
 		
 		return;
 	}
 	
+	if(dir == 'h') {
 	a= 0;
 	width= (rect->xmax-rect->xmin - 3 - pnl_icons - PNL_ICON)/nr;
 	for(pa= ar->panels.first; pa; pa=pa->next) {
@@ -522,6 +530,13 @@
 			a++;
 		}
 	}
+	}
+	else {
+		hrect= *rect;
+		hrect.xmin= rect->xmin + (PNL_ICON+5)/block->aspect + 0.001f;
+		UI_ThemeColor(TH_TITLE);
+		uiStyleFontDrawRotated(&style->paneltitle, &hrect, activename);
+	}
 }
 
 static void rectf_scale(rctf *rect, float scale)
@@ -554,6 +569,13 @@
 	headrect.ymin= headrect.ymax;
 	headrect.ymax= headrect.ymin + floor(PNL_HEADER/block->aspect + 0.001f);
 	
+	/* title */
+	if((panel->flag & PNL_CLOSEDX)) {
+		/* draw vertical title */
+		ui_draw_aligned_panel_header(ar, style, block, &headrect, 'v');
+
+	}
+	else {
 	if(!(panel->runtime_flag & PNL_FIRST)) {
 		float minx= rect->xmin+5.0f/block->aspect;
 		float maxx= rect->xmax-5.0f/block->aspect;
@@ -567,9 +589,8 @@
 		glDisable(GL_BLEND);
 	}
 	
-	/* title */
-	if(!(panel->flag & PNL_CLOSEDX)) {
-		ui_draw_aligned_panel_header(ar, style, block, &headrect);
+		/* draw horizontal title */
+		ui_draw_aligned_panel_header(ar, style, block, &headrect, 'h');
 		
 		/* itemrect smaller */	
 		itemrect.xmax= headrect.xmax - 5.0f/block->aspect;
Index: source/blender/editors/interface/interface_style.c
===================================================================
--- source/blender/editors/interface/interface_style.c	(Revision 21774)
+++ source/blender/editors/interface/interface_style.c	(Arbeitskopie)
@@ -184,6 +184,66 @@
 		BLF_disable(BLF_KERNING_DEFAULT);
 }
 
+/* draw at 90 degree angle */
+void uiStyleFontDrawRotated(uiFontStyle *fs, rcti *rect, char *str)
+{
+	float height;
+	int xofs, yofs;
+	float angle;
+	rcti txtrect;
+
+	uiStyleFontSet(fs);
+
+	height= BLF_height("2");	/* correct offset is on baseline, the j is below that */
+	/* becomes x-offset when rotated */
+	xofs= floor( 0.5f*(rect->ymax - rect->ymin - height)) + 1;
+
+	/* ignore UI_STYLE, always aligned to top */
+
+	/* XXX rotate which way? */
+	if(0) {	/* clockwise */
+		yofs=0;
+		angle= -90.0f;
+	}
+	else {	/* counterclock */
+		xofs+= height;
+		yofs= BLF_width(str) + 5;
+		angle= 90.0f;
+	}
+
+	/* translate rect to vertical */
+	txtrect.xmin= rect->xmin - (rect->ymax - rect->ymin);
+	txtrect.ymin= rect->ymin - (rect->xmax - rect->xmin);
+	txtrect.xmax= rect->xmin;
+	txtrect.ymax= rect->ymin;
+
+	/* clip is very strict, so we give it some space */
+	/* clipping is done without rotation, so make rect big enough to contain both positions */
+	BLF_clipping(txtrect.xmin-1, txtrect.ymin-yofs-xofs-4, rect->xmax+1, rect->ymax+4);
+	BLF_enable(BLF_CLIPPING);
+	BLF_position(txtrect.xmin+xofs, txtrect.ymax-yofs, 0.0f);
+
+	BLF_enable(BLF_ROTATION);
+	BLF_rotation(angle);
+
+	if (fs->shadow) {
+		BLF_enable(BLF_SHADOW);
+		BLF_shadow(fs->shadow, fs->shadowcolor, fs->shadowcolor, fs->shadowcolor, fs->shadowalpha);
+		BLF_shadow_offset(fs->shadx, fs->shady);
+	}
+
+	if (fs->kerning == 1)
+		BLF_enable(BLF_KERNING_DEFAULT);
+
+	BLF_draw(str);
+	BLF_disable(BLF_ROTATION);
+	BLF_disable(BLF_CLIPPING);
+	if (fs->shadow)
+		BLF_disable(BLF_SHADOW);
+	if (fs->kerning == 1)
+		BLF_disable(BLF_KERNING_DEFAULT);
+}
+
 /* ************** helpers ************************ */
 
 /* temporarily, does widget font */