TIFFFIELDWRITECOUNT(3tiff)

✨ TIFFFIELDWRITECOUNT ✨

okay bestie, welcome to the libtiff corner of the manual pages 💖 this one's from section 3tiff and it's about TIFFFieldWriteCount — yes it's a mouthful, no we're not changing it, it's iconic.

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🌸 NAME 🌸

TIFFFieldWriteCount — get number of values to be written to field

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🎀 SYNOPSIS 🎀

#include <tiffio.h>

int TIFFFieldWriteCount(const TIFFField *fip)

like. that's it. that's the whole call. short king 🫶

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💅 DESCRIPTION 💅

TIFFFieldWriteCount() returns the number of values to be written into the specified TIFF field — which is just a fancy way of saying how many arguments you're supposed to hand over to TIFFSetField(). ✨

For most field types this is a small positive integer, typically 1 or 2. cute, manageable, normal. but bestie, there are some special values and they are not like the others:

• TIFF_VARIABLE — this one means a variable number of values is possible 🌀 so you must supply a uint16_t count argument and a pointer data argument to TIFFSetField().
• TIFF_VARIABLE2 — same as TIFF_VARIABLE except the count argument has to have type uint32_t. (on most modern machines this makes zero practical difference ngl, and the count argument can just be an int in either case. slay.)
• TIFF_SPP — this one's giving "depends on the vibe of the image" 💀 because it means the number of arguments must equal the image's number of samples per pixel.

Now, about fip: it's a field information pointer that was previously returned by TIFFFindField(), TIFFFieldWithTag(), or TIFFFieldWithName(). don't just make one up, it has to come from one of those three, periodt. 👑

Also — and this is the lowkey tea — for most field types TIFFFieldWriteCount() returns the same value as TIFFFieldReadCount(), but there are some exceptions. so don't assume, bestie, check. 🌈

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⭐ RETURN VALUES ⭐

TIFFFieldWriteCount() returns an integer. that's the whole vibe. 🔥

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🦋 SEE ALSO 🦋

• TIFFFieldDataType (3tiff)
• TIFFFieldName (3tiff)
• TIFFFieldPassCount (3tiff)
• TIFFFieldQuery (3tiff)
• TIFFFieldReadCount (3tiff)
• TIFFFieldTag (3tiff)
• libtiff (3tiff)

go read the whole friend group, they're all connected iykyk 🫶

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💜 AUTHOR 💜

LibTIFF contributors — absolute legends, no cap 👑

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🌈 COPYRIGHT 🌈

1988-2025, LibTIFF contributors

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and that's the page, bestie!! this was LibTIFF version 4.7, dated Jun 27, 2026, and you read it in TIFFFIELDWRITECOUNT(3tiff). go forth and write your fields correctly 💖✨🎀