On Wed, 6 Nov 2024 14:15:44 GMT, GennadiyKrivoshein <d...@openjdk.org> wrote:
> This update allows users to print with grayscale using color printers. > Actually, it is not possible to use the "Monochrome" option from the "Color > Appearance" panel. Also Chromaticity.MONOCHROME can't be used to print > grayscale on color printers > ([JDK-8315113](https://bugs.openjdk.org/browse/JDK-8315113)). > > **Fix description** > When a printer supports color printing and a user adds > Chromaticity.MONOCHROME attribute to a PrintRequestAttributeSet, then the > final printing raster is transformed to the grayscale color using > java.awt.image.ColorConvertOp. When the job is a PostScript job, then the > "setColor" and "setPaint" methods of the Graphics are overridden, and user > colors (paints) are transformed to the grayscale form using the new proxy > class GrayscaleProxyGraphics2D. > > This approach is assumed to be platform, CUPS, and IPP protocol independent. > > **Tests** > The fix was tested on Ubuntu 22.04 and MacOS 12.6.1. src/java.desktop/macosx/classes/sun/lwawt/macosx/CPrinterJob.java line 802: > 800: g2.dispose(); > 801: monochromeConverter.filter(bufferedImage, > bufferedImage); > 802: pathGraphics.drawImage(bufferedImage, null, 0,0); Suggestion: pathGraphics.drawImage(bufferedImage, null, 0, 0); ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/21930#discussion_r1839519030
