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120 initially. Bytes per pixel depends on colortype and bitdepth.
127 colortype: the desired color type for the raw output image. See explanation on PNG color types.
128 bitdepth: the desired bit depth for the raw output image. See explanation on PNG color types.
173 w * h * (bytes per pixel), bytes per pixel depends on colortype and bitdepth.
176 colortype: the color type of the raw input image. See explanation on PNG color types.
177 bitdepth: the bit depth of the raw input image. See explanation on PNG color types.
194 Converts raw pixel data into a PNG file on disk.
246 Converts 32-bit RGBA raw pixel data into a PNG file on disk.
393 /*get the total amount of bits per pixel, based on colortype and bitdepth in the struct*/
395 /*get the amount of color channels used, based on colortype in the struct.
452 these values. The encoder normally ignores info_png.color when auto_convert is on, but will
457 write the PNG with a more expensive color mode (when auto_convert is on).
518 …LodePNG does not apply any color conversions on pixels in the encoder or decoder and does not inte…
519 …profile values. It merely passes on the information. If you wish to use color profiles and convert…
583 unknown chunks: chunks not known by LodePNG, passed on byte for byte.
624 Converts raw buffer from one color type to another color type, based on
691 on the image, this is better or worse than minsum.*/
747 must be set to 0 to ensure this is also used on palette or low bitdepth images.*/
806 read in the state. Returns error code on failure.
813 lodepng_inspect first since format of most other chunks depends on IHDR, and if
838 -4 bytes of CRC, computed on chunk name + data
1035 Save the binary data in an std::vector to a file on disk. The file is overwritten
1085 [X] provide alternatives for C library functions not present on some platforms (memcpy, ...)
1148 -lodepng.c(pp): give it the name lodepng.c or lodepng.cpp (or .cc) depending on your usage
1156 on any external library. There are functions to decode and encode a PNG with
1183 …plus alternatively ability to pass on chroma/gamma/ICC profile information to other color manageme…
1257 Most documentation on using the decoder is at its declarations in the header
1308 Most documentation on using the encoder is at its declarations in the header
1371 zTXt chunks use zlib compression on the text. This gives a smaller result on
1372 large texts but a larger result on small texts (such as a single program name).
1384 color type that gives good compression based on the values of colors and amount
1392 not supported on purpose: this is information loss which requires a color
1515 LodePNG on purpose, there are myriads of formats, including endianness of 16-bit
1516 colors, the order in which you store R, G, B and A, and so on. Supporting and
1519 This may mean that, depending on your use case, you may want to convert the big
1523 unsigned short* buffer on x86 CPUs.
1539 different decisions based on error types as the numbers are not guaranteed to
1653 LodePNG. For the C++ version, only the standard C++ library is needed on top.
1672 version 4.7.1 on Linux, 32-bit and 64-bit.
1699 *) Compilers on Macintosh
1706 If you encounter problems on any compilers, feel free to let me know and I may
1714 examples can be found on the LodePNG website.
1760 A quick reference of some settings to set on the LodePNGState
1826 change is backwards compatible unless you relied on unknown_chunks for those.
1864 PNG color model and bit depth, based on the amount and type of colors of the
1876 *) 11 dec 2010: encoding is made faster, based on suggestion by Peter Eastman
1957 happened on PNGs with an uncompressed block.