<AWT Dev> [9] Review request for JDK-8145174 HiDPI splash screen support on Linux

[Rajeev Chamyal]

Hello Alexandr,

 

Thanks for the review.

I have updated the webrev as per review comments.

 

Webrev : http://cr.openjdk.java.net/~rchamyal/8145174/webrev.01/

 

- It may be useful to have the same name convention for high-resolution splash screen on all platforms.
    It allows to use only one  image.java-scale2x.ext file instead to have HYPERLINK "mailto:image at 2x.ext"image at 2x.ext on Mac OS X and name.scale-200.ext on Windows.
   For windows we can have scale factor as float  value so it would be difficult to identify which image name to be displayed.

 

Regards,

Rajeev Chamyal

 

From: Alexander Scherbatiy 
Sent: 18 February 2016 02:55
To: Rajeev Chamyal; awt-dev at openjdk.java.net; Sergey Bylokhov
Subject: Re: <AWT Dev> [9] Review request for JDK-8145174 HiDPI splash screen support on Linux

 

On 12/02/16 16:21, Rajeev Chamyal wrote:



Hello All,

 

Could you please review the following fix.

Bug : https://bugs.openjdk.java.net/browse/JDK-8145174

Webrev : HYPERLINK "http://cr.openjdk.java.net/%7Erchamyal/8145174/webrev.00/"http://cr.openjdk.java.net/~rchamyal/8145174/webrev.00/

 

This is an enhancement to support HiDPI splash screen on Linux.

As a part of this enhancement implementation to splashscreen_sys.c::SplashGetScaledImageName method has been provided based on the GDK_SCALE environment variable set on unix/linux system.

The new implementation checks for GDK_SCALE set on system and returns the scaled image name, if GDK_SCALE=2 otherwise NULL.

The naming convention followed for scaled image is as follows:

 

Unscaled image name : image.ext

Scaled image name : image.java-scale2x.ext


  - It may be useful to have the same name convention for high-resolution splash screen on all platforms.
    It allows to use only one  image.java-scale2x.ext file instead to have HYPERLINK "mailto:image at 2x.ext"image at 2x.ext on Mac OS X and name.scale-200.ext on Windows.
    Could you create an enhancement on it and send it to the review? 



The automated jtreg test for this is currently failing due to issues in robot.getPixelColor it is returning wrong pixel color for GDK_SCALE=2.

 

Also fixed issues in following files.

1)      splashscreen_impl.c::SplashInit() was resetting the scaleFactor to 1.

  - SplashSetScaleFactor should not be called from the SplashGetScaledImageName method because SplashInit has not been called yet.
  - The problem with setting the scale factor in SplashInit is that it is not clear is the high-resolution splash screen image provided or not. If the the high-resolution splash screen is not provided the scale factor should be set to 1.
  - The java.c uses the following sequence for the splash screen initialization:
    --------------
     scaled_splash_name = DoSplashGetScaledImageName(
                        jar_name, file_name, &scale_factor);
    DoSplashInit();
    DoSplashSetScaleFactor(scale_factor);
    DoSplashLoadFile(scaled_splash_name);
    --------------
  To make the SplashSetScaleFactor method work it should also be added to the make/mapfiles/libsplashscreen/mapfile-vers file.

 - There are two codes which detect the scale factor. One is in the splash screen (getNativeScaleFactor()  method)
  and another in the AWT (src/java.desktop/unix/native/libawt_xawt/awt/awt_GraphicsEnv.c file).
  Is it possible to move it one code that it will be used both from splash screen and from AWT?

  Thanks,
  Alexandr.



2)      SplashScreen.java:: getBounds fixed the typo.

 

Regards,

Rajeev Chamyal

 
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