On Tue, 4 Oct 2022 18:32:33 GMT, Alexey Ivanov <aiva...@openjdk.org> wrote:
>>> Out of curiosity, can this test use `BufferedImage` to render >>> `JInternalFrame` into? >> >> @aivanov-jdk Thank you for reviewing. I wanted to clarify whether you meant >> saving just the JInternalFrame into BufferedImage? > >> > Out of curiosity, can this test use `BufferedImage` to render >> > `JInternalFrame` into? >> >> @aivanov-jdk Thank you for reviewing. I wanted to clarify whether you meant >> saving just the JInternalFrame into BufferedImage? > > Yes, just `JInternalFrame`. Yet I was talking about rendering rather than > capturing from the screen. > @aivanov-jdk Regarding saving the screen capture - > > When JIF bounds are used, a partial image of JInternalFrame (JIF) is saved. > Hence I'm using the entire outer JFrame bounds to capture the screenshot. Could be… It shouldn't. Anyway, I have no problem with capturing the entire `JFrame`. > > For the screenCapture I wanted to use **BufferedImage's getScaledInstance()** > to create the scaled version (code snippet below), but experiencing issues > while saving it. Currently I'm scaling the original image and re-drawing it > using graphics object. This is definitely not what we want. It just up-scales or down-scales the current image stored in `BufferedImage`. When you run in a HiDPI environment or with `uiScale` set explicitly to a value greater than 1.0, the number of pixels is higher. `Robot.createScreenCapture` up-scales the passed in rectangle, captures all the pixels and then down-scales the captured screenshot to the user's space coordinates. At the same time, [`createMultiResolutionScreenCapture`](https://docs.oracle.com/en/java/javase/17/docs/api/java.desktop/java/awt/Robot.html#createScreenCapture(java.awt.Rectangle)) returns a `MultiResolutionImage` which contains two variants: (1) the base image with the user specified size, down-scaled from the screen; (2) native resolution image with the device size pixels. The second variant will preserve all the pixels seen on the screen. ------------- PR: https://git.openjdk.org/jdk/pull/10274
