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therein. Starting with libpng-1.6.26, this also governs how an ADLER32 error is handled while reading the IDAT chunk. Note that it is impossible to "discard" data in a critical chunk. Choices for (int) crit_action are PNG_CRC_DEFAULT 0 error/quit ...
library is built with iTXt chunk support. Prior to libpng-1.4.0 the library was built by default without iTXt support. Also note that when iTXt is supported, they contain NULL pointers when the "compression" field contains PNG_TEXT_COMPRESSION_NONE or PNG_TEXT_COMPRESSION_zTXt. num...
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We read every piece of feedback, and take your input very seriously. Include my email address so I can be contacted Cancel Submit feedback Saved searches Use saved searches to filter your results more quickly Cancel Create saved search Sign in Sign up Reseting focus {...
/* This is an example of how to use libpng to read and write PNG files.* The file libpng-manual.txt is much more verbose then this. If you have * not read it, do so first. This was designed to be a starting point of an ...
routines can determine if the chunk is in the right place - all chunk handling routines have the same prototypes, so we will be able to handle all chunks via a callback mechanism try to fix Linux "setjmp" buffer size problems removed png_large_malloc, png_large_free, and png_reall...
#ifdef PNG_WRITE_iTXt_SUPPORTED /* Write an iTXt chunk */ void /* PRIVATE */ png_write_iTXt(png_structrp png_ptr, int compression, png_const_charp key, png_const_charp lang, png_const_charp lang_key, png_const_charp text) { png_uint_32 key_len, prefix_len;...
As well, it is now possible to set the library action on the detection of chunk CRC errors. It is possible to set different actions based on whether the CRC error occurred in a critical or an ancillary chunk. For a detailed description on using libpng, read libpng-manual.txt. For ...