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usagi/file0.txt

Created April 6, 2017 07:54
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libpng を使ったアプリが実行時に `libpng warning: Interlace handling should be turned on when using png_read_image` を吐いてくれる時の正しい対処法 ref: http://qiita.com/usagi/items/c607fb833fdd63929d33
Raw
file0.txt
libpng warning: Interlace handling should be turned on when using png_read_image
Raw
file1.txt
...
// 本件で欲しい情報
int interlace_type = PNG_INTERLACE_NONE;
// 情報が要らないところは nullptr を渡す仕様
png_get_IHDR
( png.get()
, nullptr // info
, &width
, &height
, &bits_per_element
, &color_type
, &interlace_type
, nullptr // compression_type
, nullptr //filter_type
);
...
// 本件に必要な修正
if ( interlace_type != PNG_INTERLACE_NONE )
png_set_interlace_handling( png.get() );
...
// read
png_read_image( png.get(), rows.data() );
png_read_end( png.get(), nullptr );
...
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