![]() Whenever you need an image to be in icon format (*.ico), in most cases you end up getting no option to save you picture as icon in your favorite image editor. It helps users to quickly identify a particular Program, Software or File and also helps companies or individuals to represent brand. Unlike normal images, icons are used to represent n executable program, file or a web page. That means you can view the background through its blank area. Icons can have transparency property like PNG pictures. One Icon can possess multiple images each having different size and/or color. Icons usually have standard sizes like 32×32, 48×48, 64×64, etc. Every type of format has its own different properties (animated, layered, vectors, compressed, etc) and can be used to contain image of various type, resolution and size.Īs of icons, which you can identify with their *.ico file type, are slightly different from normal pictures with different properties. Normal image files comes with various formats like *.jpg, *.png, *.gif, *.bmp which are vector (composed of drawing paths) or bitmap (composed of pixels) pictures. ![]() Otherwise, the number 32 in the above code would have to be changed and should be replaced with some Pillow-image-sniffing.If you are looking for converting your Image to *.ico format ( icon file), you are probably in the right place. The code presupposes that your PNG files are 32-Bit-per-Pixel RGBA images. # Write the header entries for each individual imageĭata += bytes((img.width, img.height, 0, 0, 1, 0, 32, 0, ))īytesize = Path(sourcefile).stat().st_sizeĭata += bytesize.to_bytes(4, byteorder="little")ĭata += offset.to_bytes(4, byteorder="little") The resulting icon file, providing each possible icon resolutionīake_several_pngs_to_ico(sourcefiles, targetfile)ĭata = bytes((0, 0, 1, 0, number_of_sources, 0)) Use this function if you want to have fine-grained control over ![]() Sourcefiles (list of str): A list of pathnames of PNG files. ![]() """Converts several PNG files into one ICO file. Image.open(sourcefile).save(targetfile, icon_sizes=icon_sizes)ĭef bake_several_pngs_to_ico(sourcefiles, targetfile): Sourcefile = "Path/to/high_resolution_logo_512x512.png"īake_one_big_png_to_ico(sourcefile, targetfile, sizes) Use this function if you have one big, square PNG fileĪnd don’t care about fine-tuning individual icon sizes. Sizes (list of int): Requested sizes of the resulting Targetfile (str): Pathname of the resulting ICO file. Sourcefile (str): Pathname of a PNG file. """Converts one big PNG into one ICO file. Depending on the situation, I wrote two functions, the first one basically the solution of Ronan Paixão, while the second one provides the functionality to join several PNG files into one ICO file: from pathlib import Pathĭef bake_one_big_png_to_ico(sourcefile, targetfile, sizes=None): Fortunately, a modern ICO file can contain multiple PNG files inside, so the task boils down to the simple challenge of writing some header entries. As far as I can see, the Pillow package doesn't provide this capability. ![]() Which means that I want to convert not a single, but multiple PNG files into a single ICO file. If you have one high-resolution PNG file of your logo and want to convert it to an ICO file, the answer of Ronan Paixão is probably the easiest way to go.īut an ICO file can contain multiple images, intended for different resolutions, and I often found myself in the situation of wanting to have fine-grained control over these different resolutions, to avoid unfortunate anti-aliasing effects, which means that I want to provide each image resolution individually. If all you want is a favicon, Douglas Leeder's answer seems perfectly fine to me. Although this question is rather old, it's a prominent search result for using Python to convert PNG files to ICO, so I thought I'll add my two cents. ![]()
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