Fix #19431: gestures would sometimes draw incorrect, now ensures they

are always drawn in pixel space.

source/blender/windowmanager/WM_api.h

@@ -264,6 +264,7 @@ void		wmPopMatrix			(void);		/* one level only */
 void		wmFrustum			(float x1, float x2, float y1, float y2, float n, float f);
 void		wmOrtho				(float x1, float x2, float y1, float y2, float n, float f);
 void		wmOrtho2			(float x1, float x2, float y1, float y2);
+void		wmOrthoPixelSpace	(void);
 
 			/* utilities */
 void		WM_set_framebuffer_index_color(int index);

source/blender/windowmanager/intern/wm_draw.c

@@ -585,7 +585,7 @@ static void wm_method_draw_triple(bContext *C, wmWindow *win)
 		}
 	}
 
-	if(win->screen->do_draw_gesture)
+	if(screen->do_draw_gesture)
 		wm_gesture_draw(win);
 
 	if(wm->paintcursors.first) {

source/blender/windowmanager/intern/wm_gesture.c

@@ -248,6 +248,7 @@ void wm_gesture_draw(wmWindow *win)
 	for(; gt; gt= gt->next) {
 		/* all in subwindow space */
 		wmSubWindowSet(win, gt->swinid);
+		wmOrthoPixelSpace();
 		
 		if(gt->type==WM_GESTURE_RECT)
 			wm_gesture_draw_rect(win, gt);

source/blender/windowmanager/intern/wm_subwindow.c

@@ -405,6 +405,16 @@ void wmOrtho2(float x1, float x2, float y1, float y2)
 	wmOrtho(x1, x2, y1, y2, -100, 100);
 }
 
+void wmOrthoPixelSpace(void)
+{
+	if(_curswin) {
+		int width, height;
+
+		wm_subwindow_getsize(_curwindow, _curswin->swinid, &width, &height);
+		wmOrtho2(-0.375, (float)width-0.375, -0.375, (float)height-0.375);
+		wmLoadIdentity();
+	}
+}
 
 /* *************************** Framebuffer color depth, for selection codes ********************** */