How to Resolve the 'libpng warning: iCCP: known incorrect sRGB profile' Error?

Understanding the Warning: "libpng warning: iCCP: known incorrect sRGB profile"

When loading a PNG image with SDL, you may encounter the warning "libpng warning: iCCP: known incorrect sRGB profile." This warning indicates an issue with the image's International Color Consortium (ICC) profile.

Causes of the Warning:

• Incorrectly configured ICC profile in the PNG image.
• Stricter checking of ICC profiles in libpng-1.6 or higher.

Solution:

There are several options to solve this problem:

1. Ignore the Warning:

Some applications may not treat warnings as errors, allowing you to ignore the message.

2. Remove the iCCP Chunk (Windows):

• Change directory (CD) to the folder containing the PNG images.
• Use ImageMagick to convert the PNG images without the iCCP chunk:

convert in.png out.png

3. Remove the iCCP Chunk (All Platforms):

• Install the ImageMagick package with libpng16 support.
• Use the mogrify command to remove the iCCP chunk from all PNG files in a directory:

mogrify *.png

4. Identify and Fix Problematic Files (Windows):

• Use pngcrush to identify files with incorrect ICC profiles:

pngcrush -n -q *.png

5. Install and Use pngcrush:

• Install pngcrush, a tool specifically designed for manipulating PNG images.
• Remove the iCCP chunk using pngcrush:

pngcrush -nowarn -iphone in.png out.png

Note:

• For Android projects, navigate to the "res" folder within the project directory and run the ImageMagick commands from there.
• You can also use other image editing tools that support removing the iCCP chunk (e.g., GIMP, Photoshop).

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