<Swing Dev> [9] Review request for 6302464 Allow programmatic enabling of subpixel anti-aliasing in Swing

[Alexander Scherbatiy]

On 8/21/2015 2:18 PM, Sergey Bylokhov wrote:
> Hi, Alexander.
> It seems this is only a part of the request. It does not cover some 
> situations like java properties, which can be used to 
> enable/set/disable anti-aliasing.
    The awt.useSystemAAFontSettings property overrides the desktop font 
rendering hints which can be obtained from toolkit by 
awt.font.desktophints key.
> Also it is unclear how and why our look and feels modify the desktop 
> properties, this api seems private also.
    I have filled an issue on it: JDK-8134146 Java L&Fs redefine Desktop 
Font Rendering Hints
       https://bugs.openjdk.java.net/browse/JDK-8134146

   Thanks,
   Alexandr.

>
> On 13.08.15 15:07, Alexander Scherbatiy wrote:
>>
>> Hello,
>>
>> Could you review the fix:
>>   bug: https://bugs.openjdk.java.net/browse/JDK-6302464
>>   webrev: http://cr.openjdk.java.net/~alexsch/6302464/webrev.00
>>
>> Swing uses internal API to set antialiasing settings for L&Fs and 
>> components.
>>
>>     SwingUtilities2.AATextInfo aaTextInfo = new 
>> SwingUtilities2.AATextInfo(
>>             RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB, 140);
>>
>> UIManager.getDefaults().put(SwingUtilities2.AA_TEXT_PROPERTY_KEY, 
>> aaTextInfo); // set aa hints globally
>> component.putClientProperty(SwingUtilities2.AA_TEXT_PROPERTY_KEY, 
>> aaTextInfo); // set aa hints for a JComponent
>>
>>
>> There are some ways to provide a public mechanism for antialiasing 
>> enabling in Swing:
>>
>> 1. Setting antialiasing rendering hints into UI defaults and 
>> component client properties:
>>
>> UIManager.getDefaults().put(RenderingHints.KEY_TEXT_ANTIALIASING, 
>> RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB);
>> component.putClientProperty(RenderingHints.KEY_TEXT_ANTIALIASING, 
>> RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB);
>>
>> 2. Setting a map which contains antialiasing hints:
>>
>>     Map<RenderingHints.Key, Object> aaHintsMap = new HashMap<>();
>>     aaHintsMap.put(RenderingHints.KEY_TEXT_ANTIALIASING, 
>> RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB);
>>
>>     UIManager.getDefaults().put(AA_TEXT_PROPERTY_KEY, aaHintsMap);
>>     component.putClientProperty(AA_TEXT_PROPERTY_KEY, aaHintsMap);
>>
>> 3. Information about antialiasing hints can be stored in a public class
>>
>>     AATextInfo aaTextInfo = new 
>> AATextInfo(RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB, 140);
>>     UIManager.getDefaults().put(AA_TEXT_PROPERTY_KEY, aaTextInfo);
>>     component.putClientProperty(AA_TEXT_PROPERTY_KEY, aaTextInfo);
>>
>> The proposed fix used the first approach.
>>
>> Thanks,
>> Alexandr.
>>
>
>