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145 initially. Bytes per pixel depends on colortype and bitdepth.
152 colortype: the desired color type for the raw output image. See explanation on PNG color types.
153 bitdepth: the desired bit depth for the raw output image. See explanation on PNG color types.
206 w * h * (bytes per pixel), bytes per pixel depends on colortype and bitdepth.
209 colortype: the color type of the raw input image. See explanation on PNG color types.
210 bitdepth: the bit depth of the raw input image. See explanation on PNG color types.
227 Converts raw pixel data into a PNG file on disk.
292 Converts 32-bit RGBA raw pixel data into a PNG file on disk.
445 /*get the total amount of bits per pixel, based on colortype and bitdepth in the struct*/
447 /*get the amount of color channels used, based on colortype in the struct.
506 these values. The encoder normally ignores info_png.color when auto_convert is on, but will
511 write the PNG with a more expensive color mode (when auto_convert is on).
572 …LodePNG does not apply any color conversions on pixels in the encoder or decoder and does not inte…
573 …profile values. It merely passes on the information. If you wish to use color profiles and convert…
676 unknown chunks: chunks not known by LodePNG, passed on byte for byte.
717 Converts raw buffer from one color type to another color type, based on
784 on the image, this is better or worse than minsum.*/
841 must be set to 0 to ensure this is also used on palette or low bitdepth images.*/
904 of the PNG file and outputs what it read in the state. Returns error code on failure.
911 lodepng_inspect first since format of most other chunks depends on IHDR, and if
936 -4 bytes of CRC, computed on chunk name + data
1145 Save the binary data in an std::vector to a file on disk. The file is overwritten
1198 [X] provide alternatives for C library functions not present on some platforms (memcpy, ...)
1265 -lodepng.c(pp): give it the name lodepng.c or lodepng.cpp (or .cc) depending on your usage
1273 on any external library. There are functions to decode and encode a PNG with
1300 …plus alternatively ability to pass on chroma/gamma/ICC profile information to other color manageme…
1372 Most documentation on using the decoder is at its declarations in the header
1423 Most documentation on using the encoder is at its declarations in the header
1486 zTXt chunks use zlib compression on the text. This gives a smaller result on
1487 large texts but a larger result on small texts (such as a single program name).
1499 color type that gives good compression based on the values of colors and amount
1507 not supported on purpose: this is information loss which requires a color
1630 LodePNG on purpose, there are myriads of formats, including endianness of 16-bit
1631 colors, the order in which you store R, G, B and A, and so on. Supporting and
1634 This may mean that, depending on your use case, you may want to convert the big
1638 unsigned short* buffer on x86 CPUs.
1654 different decisions based on error types as the numbers are not guaranteed to
1768 LodePNG. For the C++ version, only the standard C++ library is needed on top.
1787 version 4.7.1 on Linux, 32-bit and 64-bit.
1814 *) Compilers on Macintosh
1821 If you encounter problems on any compilers, feel free to let me know and I may
1829 examples can be found on the LodePNG website.
1878 A quick reference of some settings to set on the LodePNGState
1950 change is backwards compatible unless you relied on unknown_chunks for those.
1988 PNG color model and bit depth, based on the amount and type of colors of the
2000 *) 11 dec 2010: encoding is made faster, based on suggestion by Peter Eastman
2081 happened on PNGs with an uncompressed block.