More loplugin:simplifybool

Change-Id: I445a6edc0fc2c840cde777e8664bac3362c9b6e2

canvas/source/cairo/cairo_canvas.cxx

@@ -93,7 +93,7 @@ namespace cairocanvas
             throw lang::NoSupportException( "Passed SystemGraphicsData invalid!" );
 
         bool bHasCairo = pOutDev->SupportsCairo();
-        ENSURE_ARG_OR_THROW(bHasCairo == true, "SpriteCanvas::SpriteCanvas: No Cairo capability");
+        ENSURE_ARG_OR_THROW(bHasCairo, "SpriteCanvas::SpriteCanvas: No Cairo capability");
 
         // setup helper
         maDeviceHelper.init( *this, *pOutDev );

canvas/source/cairo/cairo_spritecanvas.cxx

@@ -86,7 +86,7 @@ namespace cairocanvas
                 "Parent window not VCL window, or canvas out-of-process!", NULL);
 
         bool bHasCairo = pParentWindow->SupportsCairo();
-        ENSURE_ARG_OR_THROW(bHasCairo == true,
+        ENSURE_ARG_OR_THROW(bHasCairo,
                             "CairoSpriteCanvas::SpriteCanvas: No Cairo capability");
 
         Size aPixelSize( pParentWindow->GetOutputSizePixel() );

canvas/source/opengl/ogl_spritecanvas.cxx

@@ -97,7 +97,7 @@ namespace oglcanvas
         // avoid repaints on hidden window (hidden: not mapped to
         // screen). Return failure, since the screen really has _not_
         // been updated (caller should try again later)
-        return !mbIsVisible ? false : SpriteCanvasBaseT::showBuffer( bUpdateAll );
+        return mbIsVisible && SpriteCanvasBaseT::showBuffer( bUpdateAll );
     }
 
     sal_Bool SAL_CALL SpriteCanvas::switchBuffer( sal_Bool bUpdateAll ) throw (uno::RuntimeException, std::exception)
@@ -107,7 +107,7 @@ namespace oglcanvas
         // avoid repaints on hidden window (hidden: not mapped to
         // screen). Return failure, since the screen really has _not_
         // been updated (caller should try again later)
-        return !mbIsVisible ? false : SpriteCanvasBaseT::switchBuffer( bUpdateAll );
+        return mbIsVisible && SpriteCanvasBaseT::switchBuffer( bUpdateAll );
     }
 
     uno::Reference< rendering::XAnimatedSprite > SAL_CALL SpriteCanvas::createSpriteFromAnimation(