For setting DIB bits SetDIBits and SetDIBitsToDevice.
For getting DIB bits though there's only GetDIBits, at least as far I have seen.
Is there some kind of undocumented GetDIBitsFromDevice function that exists? SetDIBitsToDevice is a very powerful function (far more than just SetDIBits), because it allows you to take any rectangular portion of an image, who's pixels are represented by a byte array, and paste it anywhere in a displayed image (where that displayed image is represented by a DC). I would like to be able to do the reverse of this, take any portion of a displayed image, and copy it into byte array. GetDIBits does not have the ability to select a rectangular portion of an image displayed in a DC. GetDIBits only allows you to capture the entire displayed image (whether that image is the screen, or just one window on the screen).
Yes, I could use a set of functions like creating a new DC and a new DIB and then selecting the DIB into the DC, and then BitBlt a portion of the source into the new DC, and then in turn use GetDIBits to get a byte array copy of that new DC that I had created, and then clean up by unselecting the DIB, and deleting both the DIB and the DC, but that seems like unnecesary extra work. If a single function like SetDIBitsToDevice can be used for setting only a portion of the pixels in a displayed image, it seems only logical that there would be (and should be) an equivalent function to get only a portion of the pixels within an image.
For getting DIB bits though there's only GetDIBits, at least as far I have seen.
Is there some kind of undocumented GetDIBitsFromDevice function that exists? SetDIBitsToDevice is a very powerful function (far more than just SetDIBits), because it allows you to take any rectangular portion of an image, who's pixels are represented by a byte array, and paste it anywhere in a displayed image (where that displayed image is represented by a DC). I would like to be able to do the reverse of this, take any portion of a displayed image, and copy it into byte array. GetDIBits does not have the ability to select a rectangular portion of an image displayed in a DC. GetDIBits only allows you to capture the entire displayed image (whether that image is the screen, or just one window on the screen).
Yes, I could use a set of functions like creating a new DC and a new DIB and then selecting the DIB into the DC, and then BitBlt a portion of the source into the new DC, and then in turn use GetDIBits to get a byte array copy of that new DC that I had created, and then clean up by unselecting the DIB, and deleting both the DIB and the DC, but that seems like unnecesary extra work. If a single function like SetDIBitsToDevice can be used for setting only a portion of the pixels in a displayed image, it seems only logical that there would be (and should be) an equivalent function to get only a portion of the pixels within an image.
