Contents

#ifndef PNG_ENCODING_H
#define PNG_ENCODING_H

#define R_BYTE(pixel)  ((BYTE) ((pixel & (PIXEL) 0xff000000) >> 24))
#define G_BYTE(pixel)  ((BYTE) ((pixel & (PIXEL) 0x00ff0000) >> 16))
#define B_BYTE(pixel)  ((BYTE) ((pixel & (PIXEL) 0x0000ff00) >> 8))
#define A_BYTE(pixel)  ((BYTE) ((pixel & (PIXEL) 0x000000ff)))

#define FILTER_BYTE(byte, adjustment)  byte = (BYTE) (((byte) - (adjustment)) & 0x000000ff)

/*
  Encodes an image and append it to the stream.
  A normal PNG will only have one pass and call this method once, while interlaced
  images are split up in 7 distinct images. This method will be called for every one
  of these images, reusing the stream.
  
  This function should replace ChunkyPNG::Canvas::PNGEncoding.encode_png_image_pass_to_stream
*/
VALUE oily_png_encode_png_image_pass_to_stream(VALUE self, VALUE stream, VALUE color_mode, VALUE filtering);

#endif

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
oily_png-0.0.7	ext/oily_png/png_encoding.h
oily_png-0.0.6	ext/oily_png/png_encoding.h