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#ifndef OILY_PNG_PNG_DECODING_H
#define OILY_PNG_PNG_DECODING_H
#define UNFILTER_BYTE(byte, adjustment) byte = (BYTE) (((byte) + (adjustment)) & 0x000000ff)
#define ADD_PIXEL_FROM_PALLETE(pixels, decoding_palette, palette_entry) \
if (RARRAY_LEN(decoding_palette) > (palette_entry)) { \
rb_ary_push(pixels, rb_ary_entry(decoding_palette, (palette_entry))); \
} else { \
rb_raise(rb_eRuntimeError, "The decoding palette does not have %d entries!", (palette_entry)); \
}
#define ADD_PIXEL_FROM_RGBA(pixels, r, g, b, a) rb_ary_push(pixels, UINT2NUM(BUILD_PIXEL(r,g,b,a)));
typedef void(*scanline_decoder_func)(VALUE, BYTE*, long, long, VALUE);
/*
Decodes an image pass from the given byte stream at the given position.
A normal PNG will only have one pass that consumes the entire stream, while an
interlaced image requires 7 passes which are loaded from different starting positions.
This function shouild replace ChunkyPNG::Canvas::PNGDecoding.decode_png_image_pass
*/
VALUE oily_png_decode_png_image_pass(VALUE self, VALUE stream, VALUE width, VALUE height, VALUE color_mode, VALUE depth, VALUE start_pos);
#endif
Version data entries
11 entries across 11 versions & 2 rubygems