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Thread: Customize IrfanView more like Windows Photo Viewer.

  1. #1
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    Lightbulb Customize IrfanView more like Windows Photo Viewer.

    Add an option to center the image inside the viewer.

    Also it would be nice to be able to change the viewer background color (more easily) to white, grey, black or any other color when viewing transparent PNGs (or other transparent formats) so we can check the colors of the borders of the images, maybe even with a button to automatically switch the colors.
    Last edited by gau; 23.11.2011 at 05:49 AM.

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    Moderator Enterprise User Bhikkhu Pesala's Avatar
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    Quote Originally Posted by gau View Post
    Add an option to center the image inside the viewer.`
    View menu, Display options.

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    Whoa thanks, I missed that one

    Now if the background could be changed like that it would be great, maybe a preview window with black, grey and white backgrounds.
    Last edited by gau; 06.12.2011 at 02:25 AM.

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    Options -> Property Settings -> Viewing -> Main Window Color

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    Quote Originally Posted by cwb3106 View Post
    Options -> Property Settings -> Viewing -> Main Window Color
    Yes thanks I already know that option, the problem with that setting is that you have to go into options everytime you want to change the background color, if for example you want to test your image with three different colors (white, gray and black) you have to go into options three times to change the color, additionally the color won't change right away (transparent formats like PNG) but you have to change the image to the next one and go back to see the changes applied to the transparency.

    When working with multiple files this could be a tedious task.

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    Professional User Mij's Avatar
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    The last selected Tab remains selected in the Options dialog, so you only have to press P and the dialog you need reappears, and after selecting a new background color and pressing OK to close the dialog, the color changes immediately. You do not have to change the image.

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    Good tip about pressing p but the problem is with PNG files (maybe others too) with transparency, the color of the background indeed changes except for the transparency part of the image, for that you have to change the image and go back (or refresh the image using other method).

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    Professional User Mij's Avatar
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    I thought that the whole idea of the request was to change the background to a different color to the transparency so that you could see the edges of the image.

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    Yeah sorry, maybe I should post this "PNG transparency" thing as a bug report.

    But still just suggest a fast background color change feature.

    I guess that's all.

    THX.

  10. #10
    Professional User Mij's Avatar
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    Quote Originally Posted by gau View Post
    Yeah sorry, maybe I should post this "PNG transparency" thing as a bug report.
    It is not a bug though, gau. That is the way it is designed to work. Irfanview does not support layers so it cannot display true transparency. If you select the Show transparent color option for PNG images in the Viewing tab of Properties then all that happens when you open your PNG is that the color that is tagged as being transparent is replaced by the current Irfanview background color so that it simulates looking through a transparent area at the background. The background color becomes part of the displayed bitmap image though. It is not really transparent.

    So if you change the background color while the image is open the simulated transparent area does not change, as you have seen. You must open the PNG again for a new background color to become part of the displayed image.

    Personally I always leave that option in the Viewing tab unchecked and the same for the Show transparency in non-animated GIFs option in the JPG/PCD/GIF tab. That way the transparent color tag in the file is ignored and you see the original color that was last saved in that area. It does not then usually suffer from the problem you have.

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