The instructions are on the wiki https://www.pygame.org/wiki/info#Mailing%20List
On Thu, Sep 17, 2020, 15:19 Aleksandar Petrovic < aleksandar.petrovi...@gmail.com> wrote: > I want unsubscribe from this list > > чет, 17. сеп 2020. у 22:16 Russell Cumins <rcum...@gmail.com> је > написао/ла: > >> Hi Irv, >> >> Found this on Google. >> >> https://graphicdesign.stackexchange.com/questions/67964/what-does-24bit-mean-exactly-when-referring-to-png-image-file >> >> If it is correct, then the alpha channel would show up on a PNG with 32 >> bit depth. >> E.g >> (R,G,B) -> (8 bits, 8 bits, 8 bits) = PNG-24 >> (R,G,B, A) -> (8 bits, 8 bits, 8 bits, 8 bits) = PNG-32 >> >> That being said. I'm not 100% sure on this, but I think convert_alpha() >> can handle images without an alpha channel anyway. >> >> >> On Thu, 17 Sep 2020, 00:47 Irv Kalb, <i...@furrypants.com> wrote: >> >>> I'm updating a class that loads and displays an image - an Image class. >>> The class also has many additional calls to rotate, scale, show, hide, >>> etc. I'm using pygame 1.9.6 with Python 3.7.3 >>> >>> I know that I should be converting the original image that is loaded >>> into a better format for displaying in a window. So I want to change my >>> code to take care of that conversion. My understanding is that if the >>> image has an alpha channel, then when I load the image I should use >>> ".convert_alpha()", and if not, I should use ".convert()". (Please let me >>> know if this is not correct.) >>> >>> I want people who use this class to be able to load any image (typically >>> png or jpg file), and have my code do the conversion the appropriate way >>> without having to ask the caller to let me know the type of the image. >>> >>> Therefore, in my class, when I load an image, I want to know if the >>> image has an alpha channel. I'm not sure of the best way of doing this. >>> So far, I've come up with two different ways to do this. >>> >>> Approach #1 - check the extension of the file: >>> >>> self.originalImage = pygame.image.load(path) >>> if path.endswith('.png'): >>> self.originalImage.convert_alpha() >>> else: >>> self.originalImage.convert() >>> >>> >>> Approach #2 - check the bitdepth of the image: >>> >>> self.originalImage = pygame.image.load(path) >>> if pygame.Surface.get_bitsize(self.origialImage) == 24: >>> self.originalImage.convert_alpha() >>> else: >>> self.originalImage.convert() >>> >>> >>> In my tests, both seem to work, but I don't feel completely comfortable >>> with either one. I know very little about art - for example, I don't know >>> if all ".png" files have an alpha channel. I'm also not sure if all images >>> with an alpha channel are 24 bits deep. >>> >>> Looking to see if either of these is better than the other, or if there is >>> a different approach that I should take. Open to suggestions. >>> >>> Thanks in advance, >>> >>> Irv >>> >>>
