On Wed, 10 Mar 2021 01:48:28 GMT, Sergey Bylokhov <s...@openjdk.org> wrote:
>> Printing text using GlyphVector outline has bad quality on printers with low >> DPI on Windows. >> The GDI system used for text printing on Windows accepts only integer path >> coordinates. >> Rounding GlyphVector outline coordinates leads to distorted printed text. >> >> The issue had been reported as JDK-8256264 but was reverted because of the >> regression JDK-8259007 "This test printed a blank page". >> >> The fix JDK-8256264 scaled coordinates in wPrinterJob.moveTo()/lineTo() >> methods up and scaled transforms in wPrinterJob.beginPath()/endPath() down. >> >> The regression was in the WPathGraphics.deviceDrawLine() method which uses >> wPrinterJob.moveTo()/lineTo() methods without surrounding them with >> wPrinterJob.beginPath()/endPath() so the line coordinates were only scaled >> up. >> >> I tried to put wPrinterJob.beginPath()/endPath() methods around >> wPrinterJob.moveTo()/lineTo() in the method WPathGraphics.deviceDrawLine() >> but the line was not drawn at all even without scaling coordinates up and >> transform down (without JDK-8256264 fix). It looks like GDI treats this case >> as an empty shape. >> >> The proposed fix applies path coordinates and transform scaling only in >> WPathGraphics.convertToWPath() method. >> The one more PathPrecisionScaleFactorShapeTest.java manual test is added >> which checks that all methods that draw paths in WPathGraphics are used: >> line in WPathGraphics.deviceDrawLine() and SEG_LINETO/SEG_QUADTO/SEG_CUBICTO >> in WPathGraphics.convertToWPath() . >> >> The `java/awt/print` and `java/awt/PrintJob` automatic and manual tests were >> run on Windows 10 Pro with the fix. >> >> There are two failed automated tests which fail without the fix as well: >> java/awt/print/PrinterJob/GlyphPositions.java >> java/awt/print/PrinterJob/PSQuestionMark.java >> >> The following manual tests have issues on my system: >> - `java/awt/print/Dialog/PrintDlgPageable.java` >> java.lang.IllegalAccessException: class >> com.sun.javatest.regtest.agent.MainWrapper$MainThread cannot access a member >> of class PrintDlgPageable with modifiers "public static" >> >> - `java/awt/print/PrinterJob/PrintAttributeUpdateTest.java` I select pages >> radio button, press the print button but the test does not finish and I do >> not see any other dialogs with pass/fail buttons. >> >> - `java/awt/PrintJob/PrintCheckboxTest/PrintCheckboxManualTest.java` Tests >> that there is no ClassCastException thrown in printing checkbox and >> scrollbar with XAWT. Error. Can't find HTML file: >> test\jdk\java\awt\PrintJob\PrintCheckboxTest\PrintCheckboxManualTest.html >> >> >> - `java/awt/print/PrinterJob/SecurityDialogTest.java` A windows with >> instructions is shown but it does not contain print/pass/fail buttons and >> it is not possible to close the window. >> >> - The tests below fail with "Error. Parse Exception: Arguments to `manual' >> option not supported: yesno" message: >> java/awt/print/Dialog/DialogOrient.java >> java/awt/print/Dialog/DialogType.java >> java/awt/print/PrinterJob/ImagePrinting/ClippedImages.java >> java/awt/print/PrinterJob/ImagePrinting/ImageTypes.java >> java/awt/print/PrinterJob/ImagePrinting/PrintARGBImage.java >> java/awt/print/PrinterJob/PageDialogTest.java >> java/awt/print/PrinterJob/PageRanges.java >> java/awt/print/PrinterJob/PageRangesDlgTest.java >> java/awt/print/PrinterJob/PrintGlyphVectorTest.java >> java/awt/print/PrinterJob/PrintLatinCJKTest.java >> java/awt/print/PrinterJob/PrintTextTest.java >> java/awt/print/PrinterJob/SwingUIText.java >> java/awt/PrintJob/ConstrainedPrintingTest/ConstrainedPrintingTest.java >> java/awt/PrintJob/PageSetupDlgBlockingTest/PageSetupDlgBlockingTest.java >> java/awt/PrintJob/SaveDialogTitleTest.java > > Marked as reviewed by serb (Reviewer). @prsadhuk please take a look ------------- PR: https://git.openjdk.java.net/jdk/pull/2756
