Font rendering (on OS-X)

[Phil Race]

I tried on firefox and Safari and then downloaded to my Mac and tried 
directly from disk
using quicktime but it still failed ..

-phil.

On 1/9/15 9:47 AM, Kevin Rushforth wrote:
> I tried the video on Firefox, which said "Video can't be played 
> because the file is corrupt."
>
> So I tried it on Chrome and it plays fine for me (as an aside, I find 
> Chrome to be the most robust browser these days even though I haven't 
> quite made the switch from Firefox as my default browser).
>
> -- Kevin
>
>
> Phil Race wrote:
>> PS .. your video came up all black for me ..
>>
>> -phil.
>>
>> On 1/9/15 9:37 AM, Phil Race wrote:
>>> Glyphs advances are accumulated in floating point and the rendering 
>>> of the glyph sub-pixel positioned.
>>> The nodes however are I expect, positioned at an integer position 
>>> and in
>>> any case I am pretty sure that the fractional advance at the end of 
>>> "ABC" is not passed
>>> on to the start of drawing "DEF".
>>> So I think you are just seeing a subtle consequence of rounding 
>>> because the
>>> starting position of the first glyph in the 2nd text node/string is 
>>> not the same as you will get if
>>> you draw it as one string. Where exactly it happens (at which glyph) 
>>> will depend on
>>> the way the numbers work out. Whether it happens elsewhere will depend
>>> on the advances the platform returns, but its possible.
>>>
>>> Its possible that with some amount of work that TextFlow could pass 
>>> on this
>>> information so that its less apparent but I don't know off-hand what 
>>> would
>>> be involved or how complete a fix it would be. Nor whether its 
>>> actually worth
>>> the effort for this case.
>>>
>>> -phil.
>>>
>>> On 1/9/15 8:27 AM, Tom Schindl wrote:
>>>> Hi,
>>>>
>>>> I know font rendering has been discussed a lot already on this 
>>>> forum but
>>>> I don't want to talk about sharpness of text but very strange 
>>>> effects of
>>>> glyph positioning.
>>>>
>>>> The program below switches between 1 and 2 text-nodes which results in
>>>> strange effects at least on my OS-X box.
>>>>
>>>> With a font size 15 you see the 2nd text shifting a bit to the 
>>>> right now
>>>> you could explain this with rounding but it gets even more interesting
>>>> if you make the font size 25 suddenly the F is changing its position!
>>>>
>>>> I recorded a video showing the behavior on my system at
>>>> http://efxclipse.bestsolution.at/ScreenFlow.mp4
>>>>
>>>> My questions are:
>>>> a) does that happen on other OSes as well
>>>> b) does anyone have an idea where I could start searching
>>>> c) do you think this can be fixed?
>>>>
>>>>
>>>>> package application;
>>>>>
>>>>>
>>>>> import javafx.application.Application;
>>>>> import javafx.scene.Node;
>>>>> import javafx.scene.Scene;
>>>>> import javafx.scene.control.Button;
>>>>> import javafx.scene.control.TextField;
>>>>> import javafx.scene.layout.VBox;
>>>>> import javafx.scene.text.Font;
>>>>> import javafx.scene.text.Text;
>>>>> import javafx.scene.text.TextFlow;
>>>>> import javafx.stage.Stage;
>>>>>
>>>>> public class TestMe extends Application {
>>>>>
>>>>>     private TextField fontSize;
>>>>>     private TextField text;
>>>>>
>>>>>     @Override
>>>>>     public void start(Stage primaryStage) throws Exception {
>>>>>         VBox b = new VBox();
>>>>>
>>>>>         text = new TextField("ABCDEF");
>>>>>         b.getChildren().add(text);
>>>>>
>>>>>         fontSize = new TextField("15");
>>>>>         b.getChildren().add(fontSize);
>>>>>
>>>>>         TextFlow f = new TextFlow(createText(text.getText()));
>>>>>
>>>>>         b.getChildren().add(f);
>>>>>         Button bu = new Button("Split text");
>>>>>         bu.setOnAction((e) -> {
>>>>>             if( f.getChildren().size() == 1 ) {
>>>>>                 int l = text.getText().length() / 2;
>>>>>
>>>>> f.getChildren().setAll(createText(text.getText().substring(0, 
>>>>> l)),createText(text.getText().substring(l)));
>>>>>                 bu.setText("One Text");
>>>>>             } else {
>>>>> f.getChildren().setAll(createText(text.getText()));
>>>>>                 bu.setText("Split text");
>>>>>             }
>>>>>         });
>>>>>         b.getChildren().add(bu);
>>>>>
>>>>>         Scene s = new Scene(b);
>>>>> s.getStylesheets().add(TestMe.class.getResource("application.css").toExternalForm()); 
>>>>>
>>>>>         primaryStage.setScene(s);
>>>>>         primaryStage.show();
>>>>>     }
>>>>>
>>>>>     private Node createText(String text) {
>>>>>         Text t = new Text(text);
>>>>> //        t.setSmooth(false);
>>>>> t.setFont(Font.font(Integer.parseInt(fontSize.getText())));
>>>>>         return t;
>>>>>     }
>>>>>
>>>>>     public static void main(String[] args) {
>>>>>         Application.launch(args);
>>>>>     }
>>>>> }
>>>>
>>>> Tom
>>>>
>>>
>>